201209659 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種顯示面板，尤指一種具光感測定位功 能之顯示面板。 【先前技術】 近年來，具面板輸入機制的電子產品已成為流行產品，利用輸 入式顯示面板作為使用者與電子產品之間的溝通介面，可讓使用者 直接透過顯示面板來控制電子產品的操作，而不需透過鍵盤或滑 鼠。輸入式顯示面板的輸入機制分為光感測輸入模式與觸碰輸入模 式’其中觸碰輸入模式會因經常性的面板觸碰動作而容易使面板受 知’所以基於光制輸人模式峨示面板可具有較長的使用壽命。 φ習知基於光感測輸入模式的顯示面板之光感測定位機制可分為被動 式架構與主動式架構。在被動式光感測定位機制的運作中，由於光 感測訊號僅根據光感應元件受光後之漏電流而產生，所以光感應靈 敏度較低。至於主動式光感測定位機制則利用光感應元件之受光狀 態以調整放大電晶體之問極電壓，進而產生具高靈敏度之光感測訊 號。但是由於在主動式光感測定位機制的運作中，施加於光感應相 關元件與放大電晶體的高低偏壓係為固定電璧，所以元件特性容易 因長期岐㈣壓應力而發生偏移，如此會導致紐舰號之誤 201209659 差，進而造成後級電路的誤動作。 【發明内容】 盥據本發^^實施_露—種㈣面板，其包含電壓提供單元 與感測早心龍提供單元_來提供第—轉電壓轉二 壓。感測單元電連接於電顧供單元，用來根據第一驅動電壓 :=:提供讀出訊號。感測單元包含第-電晶體、第二電晶 體以及第二電晶體。第-電晶體包含第—端、第 中第Γ電晶體之第—端電連接於電壓提供單灿概第-驅=電，、 壓，第一電晶體之第二端電連接於第一 ' 端與間極端，其中第二電晶體之第-端電連接 壓提供^體之第二端’第二電晶體之第二端與閘極端電連接於電 认供早兀以接收第二驅動電壓。第三電晶體包含第—端、第 =極& ’其中第三電晶體之第1電連接於電壓提供單元以接收 1-驅動電壓，第三電晶體之閘極端電連接於第—電晶體之第二 端’第三電晶體之第二端用來輸出讀出訊號。感測單摘每一運作 =期包含第4段與第二時段，第—驅動電壓在第—時段内係高於 弟二驅動電壓，第—驅動電壓在第二時段内係低於第二驅動電壓。 依據本發明之實施例另揭露一種顯示面板，其包含電壓提供單 元、掃描細及_單元。電壓提供單元制來提做流驅動電壓。 描線翻來傳輸具賴性脈波之掃觀號。_單元電連接於 201209659 晶 屢提供單元，絲根據交赫動頓與掃減號叫供讀出訊號 感測單兀包含第-電晶體、第二電晶體以及第三電晶體。第一電 體包含第-端、第二端與閘極端，其中第—電晶體之第—端電連接 於電壓提供單元以減交流驅動麵，第—f晶體之第二端電連接 於第:電晶體之閘極端。第二電晶體包含第—端、第二端與閘極端， 其令第二電晶體之第-端電連接於第—電晶體之第二端，第二電晶 體之第二端與酿端電連接於掃描線以減掃描峨。第三電晶體 包含第-端、第二端與閘極端，其中第三電晶體之第—端電連接於 電壓提供單元以接收交流驅動賴，第三電晶體之_端電連接於 第二電晶體之第二端’第三電晶體之第二端用來輸出讀出訊號。感 測早π的每-運作職包含[時段鮮m掃描訊號在 第二時段内係高於交流驅動電壓，第—掃描訊號在第二時段内係低 於交流驅動電壓。 依據本發明之實施例另揭露一種顯示面板，其包含電壓提供單 =、掃描線以及感測單元。電壓提供單元係用來提供交流驅動電壓。 掃描線係用來傳輸具週期性脈波之掃描訊號。感測單元電連接於電 壓提供單元，用來根據交流驅動電壓與掃描訊號以提供讀出訊號。 感冽單元包含第一電晶體、第二電晶體以及第三電晶體。第一電晶 體包含第一端、第二端與閘極端，其中第一電晶體之第一端電連接 於掃插線以接收掃描訊號，第一電晶體之第二端電連接於第一電晶 體之閘極端。第二電晶體包含第一端、第二端與閘極端，其中第二 電曰曰體之第一端電連接於第一電晶體之第二端，第二電晶體之第二 201209659 端與間極端電賴於雜細單相Μ錢 體包含第m她^巾㈣败第 於掃描線以接收掃描職，第三電晶體之_ 動電壓 體之第二端，第三電晶體之第二踹用在一山按、弟電曰曰 =;運作週她W触，第=== 内係南於交流鷄賴，第—勒訊號在第二時段_低於交流驅 【實施方式】 下文依本發明具光感測定位功能之顯示面板，特舉實施例配合 所附圖式作詳細說明’但所提供之實施例並非用以限制本發明所涵 蓋的範圍。 第1圖為本發明具光感測定位功能之顯示面板的第一實施例示 思圖。如第1圖所示，顯示面板100包含複數掃描線1〇1、複數資 料線102、複數晝素單元105、複數讀出線110、複數感測單元12〇、 直流電壓提供單元刚、以及訊號處理單元195。每i掃描線101 係用來傳輸對應掃描訊號。每一條資料線102係用來傳輸對應資料 訊號。每一晝素單元105係用來根據對應掃描訊號控制對應資料訊 號之寫入運作，據以輸出對應影像訊號。直流電壓提供單元19〇係 用來提供固定之高準位驅動電壓vdh與低準位驅動電壓Vdl至複數 感測單元120。 201209659 每一感測單元120包含第一電晶體125、第二電晶體130、第 三電晶體135、電容14〇、以及第四電晶體15〇。在一實施例中，第 一電晶體125係為光感應薄膜電晶體(ph〇t；〇-sensing Thin Film Transistor)或光感應場效電晶體(ph〇to_sensing Field Effect Transistor)，第二電晶體130、第三電晶體135與第四電晶體15〇係 為薄膜電晶體或場效電晶體。在另一實施例中，第二電晶體丨3〇係 ^ 為光感應薄膜電晶體或光感應場效電晶體，第一電晶體125、第三 電晶體135與第四電晶體150係為薄膜電晶體或場效電晶體。閘極 電壓Vg係為而準位驅動電壓vdh與低準位驅動電壓vdl經由第一 電晶體125之通道電阻與第二電晶體13〇之通道電阻所產生之分 壓，其中第-電晶體125之通道電阻或第二電晶體13〇之通道電阻 係受照光影響。第三電晶體135根據閘極電壓^與高準位驅動電 壓Vdh以產生感測電壓v麵e，*電容14〇則用來儲存感測電壓 Vsense。由上述可知，感測單元12〇可根據其受光狀態以調整間極 Φ電壓vg，進而調整感測電壓Vsense。第四電晶體15〇根據對應掃 描線101所傳輸之掃描訊號將感測電壓v_e輪出為對應讀^訊 號，經由對應讀出線110饋入至訊號處理單元195。訊號處理單元 ⑼係用來對複數讀出線110饋入之複數讀出訊就執;：處r 據以產生觸碰位置訊號Spos。 在感測單元120的運作中，第一電晶體125、第二電晶體 與第三電晶體出係長時間承受固定之高準位驅動電龄二或低準 201209659 位驅動電壓Vdl所施加的電壓應力，所以容易導致元件特性偏移(嬖 如電晶體臨界電壓偏移）。當第一電晶體125或第二電晶體130之元 件特性偏移時，所產生之閘極電壓Vg就會發生誤差，進而使感測 電壓Vsense也跟著發生誤差，如此訊號處理單元195可能會產生錯 誤的觸碰位置訊號Spos。當第三電晶體135之元件特性偏移時，即 使閘極電壓Vg沒有誤差，所產生之感測電壓Vsense亦會發生誤 差’而號處理單元195也就可能產生錯誤的觸碰位置訊號Sp〇s。 请注意，若第一電晶體125、第二電晶體130與第三電晶體I%為 非晶矽(amorphous-Si)薄膜電晶體，則在固定偏壓下更容易導致元件 特性偏移。 第2圖為本發明具光感測定位功能之顯示面板的第二實施例示 意圖。如第2圖所示，顯示面板2〇〇包含複數掃描線2m、複數資 料線2〇2、複數晝素單;^ 2〇5、複數讀出線21〇、複數感測單元、 電壓提供單元290、以及訊號處理單元295。每—條掃描線2〇1係用 來傳輸對應掃描訊號。每-條資料線2〇2係用來傳輸對應資料訊 號。每-畫素單元2〇5電連接於對應掃描線加與對應資料線2〇2， 用來根據對應掃描訊號控制對應資料訊號之寫入運作，據以輸出對 應，像訊號。晝素單元2〇5可為基於液晶顯示之晝素單元。電壓提 供單元290係用來提供第一驅動電壓Vcl與第二驅動電壓—至複 數感測單ib 22〇。感測單元22〇的每—運作週期包含第一時段與第 二時段，第-驅動電壓Vel在第—時段内係高於第二驅動電壓、 Vc2 ’第一驅動電壓Vcl在第二時段内係低於第二驅動電壓^。 201209659 在-實施例中，電壓提供單元290係用來提供交流且互為反相之第 • 一驅動電壓Vcl與第二驅動電壓Vc2，亦即當第一驅動電壓％為 低準位電壓時，第二驅動電壓Vc2係為高準位電壓，反之亦然。在 另-實施例中，電壓提供單元290係用來提供交流之第一驅動電壓 Vcl與直流之第二驅動電壓㈣，其中第一驅動電壓之高準位 電壓南於第二驅動電壓Ve2 ’且第—驅動電壓Vel之低準位電壓低 於第-驅動電壓Vc2。在另一實施例中，電壓提供單元29〇係用來 籲提供直流之第-驅動電壓Vcl與交流之第二驅動電壓㈣，其中第 -驅動電壓Ve2之两準位電壓高於第—驅動電壓Vel，且第二驅動 電壓Vc2之低準位電壓低於第一驅動電壓Vcl。 在第2圖所示之實施例中，每一畫素單元2〇5均相鄰感測單元 220。在另-實施例中’感測單元22()係可間隔複數掃描線2()ι而設 置，或間隔複數資料線202而設置，亦即並非每一晝素單元2〇5均 與感測單元220相鄰。同理，讀出線21〇可相對應地間隔複數資料 鲁線2〇2而設置。每一感測單元no包含第一電晶體π5、第二電晶 體230、第三電晶體235、電容240、以及第四電晶體250。在一實 施例中’第一電晶體225係為光感應薄膜電晶體或光感應場效電晶 體’第二電晶體230、第三電晶體235與第四電晶體25〇係為薄膜 電晶體或場效電晶體。在另一實施例中，第二電晶體23〇係為光感 應薄膜電晶體或光感應場效電晶體，第一電晶體225、第三電晶體 235與第四電晶體250係為薄膜電晶體或場效電晶體。下文依感測 單元DUn一m說明其内各元件之耦合關係與電路運作原理。 201209659 第一電晶體225之通道電阻或第二電晶體230之通道電阻可根 據其受光狀態以調整閘極電壓VGn_m，據以驅動第三電晶體235。 第二電晶體235根據閘極電壓vGn_m與第一驅動電壓Vcl以產生 感測電壓VDn__m，而電容24〇則用來儲存感測電壓vDn_m。第四 電晶體250根據掃描線SLn所傳輸之掃描訊號sSn將感測電壓 VDn_m輸出為讀出訊號Sr〇—m，經由讀出線虹⑺饋入至訊號處理 單元295。訊號處理單元295係用來對複數讀出線21〇饋入之複數 讀出讯號(例如由讀出線RLm饋入之讀出訊號Sr〇—m與由讀出線 RLj饋入之讀出訊號Sr〇_j)執行訊號處理，據以產生觸碰位置訊號 Spos °201209659 VI. Description of the Invention: [Technical Field] The present invention relates to a display panel, and more particularly to a display panel having a light sensing position function. [Prior Art] In recent years, electronic products with panel input mechanisms have become popular products, and the input display panel is used as a communication interface between the user and the electronic product, so that the user can directly control the operation of the electronic product through the display panel. Without the need for a keyboard or mouse. The input mechanism of the input display panel is divided into a light sensing input mode and a touch input mode. The touch input mode is easy to make the panel known due to the frequent panel touch action, so the display mode based on the light input mode is displayed. The panel can have a long service life. The light sensing position mechanism of the display panel based on the light sensing input mode can be divided into a passive architecture and an active architecture. In the operation of the passive photo-sensing position mechanism, since the photo-sensing signal is generated only based on the leakage current after the light-sensing element receives light, the light-sensing sensitivity is low. The active light sensing position mechanism utilizes the light receiving state of the light sensing element to adjust the polarity of the amplifying transistor to generate a highly sensitive light sensing signal. However, since the high-low bias voltage applied to the light-sensing element and the amplifying transistor is a fixed power in the operation of the active light sensing position mechanism, the element characteristics are easily shifted due to long-term (four) compressive stress, It will cause the error of the new ship number 201209659, which will cause the malfunction of the latter circuit. SUMMARY OF THE INVENTION According to the present invention, a luminosity-type (four) panel includes a voltage supply unit and a sensing early-hearted supply unit _ to provide a first-to-turn voltage to two voltages. The sensing unit is electrically connected to the power supply unit for providing a read signal according to the first driving voltage :=:. The sensing unit includes a first transistor, a second transistor, and a second transistor. The first transistor of the first transistor and the third transistor is electrically connected to the voltage to provide a single light-drive, and the second terminal of the first transistor is electrically connected to the first An end-to-end extreme, wherein the second end of the second transistor is electrically connected to the second end of the second body. The second end of the second transistor is electrically connected to the gate terminal for early detection to receive the second driving voltage. . The third transistor includes a first end, a fourth pole, and a 'the third one of the third transistor is electrically connected to the voltage supply unit to receive the 1-drive voltage, and the gate of the third transistor is electrically connected to the first transistor. The second end of the second transistor is used to output a read signal. Each of the operations includes a fourth segment and a second period. The first driving voltage is higher than the second driving voltage in the first period, and the first driving voltage is lower than the second driving in the second period. Voltage. According to an embodiment of the invention, a display panel comprising a voltage supply unit, a scan thin and a _ unit is further disclosed. The voltage supply unit is configured to increase the flow drive voltage. Trace the line to transmit the sweeping look of the pulse. The unit is electrically connected to the 201209659 crystal supply unit, and the wire is used for reading signals according to the intersection and the sweeping signal. The sensing unit includes a first transistor, a second transistor, and a third transistor. The first electric body includes a first end, a second end and a gate terminal, wherein the first end of the first transistor is electrically connected to the voltage supply unit to reduce the alternating current driving surface, and the second end of the first f crystal is electrically connected to the first: The gate of the transistor is extreme. The second transistor includes a first end, a second end and a gate terminal, wherein the first end of the second transistor is electrically connected to the second end of the first transistor, and the second end of the second transistor is electrically connected to the brewing end Connect to the scan line to reduce the scan. The third transistor includes a first end, a second end and a gate terminal, wherein the first end of the third transistor is electrically connected to the voltage supply unit to receive the AC drive, and the third end of the third transistor is electrically connected to the second The second end of the crystal, the second end of the third transistor, is used to output a read signal. The per-operational operation of sensing the early π includes [the period fresh m scan signal is higher than the AC drive voltage in the second period, and the first scan signal is lower than the AC drive voltage in the second period. According to an embodiment of the invention, a display panel includes a voltage supply unit, a scan line, and a sensing unit. The voltage supply unit is used to provide an AC drive voltage. The scan line is used to transmit scan signals with periodic pulse waves. The sensing unit is electrically connected to the voltage supply unit for providing a read signal according to the AC driving voltage and the scanning signal. The sensing unit includes a first transistor, a second transistor, and a third transistor. The first transistor includes a first end, a second end, and a gate terminal, wherein the first end of the first transistor is electrically connected to the sweep wire to receive the scan signal, and the second end of the first transistor is electrically connected to the first electrode The gate of the crystal is extreme. The second transistor includes a first end, a second end and a gate terminal, wherein the first end of the second electric body is electrically connected to the second end of the first transistor, and the second end of the second transistor is 201209659 The extreme electricity depends on the heterogeneous single-phase money body including the mth her towel (four) defeated on the scan line to receive the scanning position, the third transistor, the second end of the dynamic voltage body, and the second electrode of the third transistor Use in a mountain press, younger brother 曰曰 =; operating week, her W touch, the first === internal system is in the exchange of chicken, Lai, the first time in the second period _ lower than the exchange drive [implementation] The present invention has been described in detail with reference to the accompanying drawings, which are not intended to limit the scope of the invention. Fig. 1 is a view showing a first embodiment of a display panel having a light sensing position function according to the present invention. As shown in FIG. 1, the display panel 100 includes a plurality of scanning lines 1〇1, a plurality of data lines 102, a plurality of pixel units 105, a plurality of sensing lines 110, a plurality of sensing units 12A, a DC voltage supply unit, and a signal. Processing unit 195. Each i scan line 101 is used to transmit a corresponding scan signal. Each data line 102 is used to transmit corresponding data signals. Each of the pixel units 105 is configured to control the writing operation of the corresponding data signal according to the corresponding scanning signal, thereby outputting the corresponding image signal. The DC voltage supply unit 19 is configured to provide a fixed high-level driving voltage vdh and a low-level driving voltage Vd1 to the complex sensing unit 120. 201209659 Each sensing unit 120 includes a first transistor 125, a second transistor 130, a third transistor 135, a capacitor 14A, and a fourth transistor 15A. In one embodiment, the first transistor 125 is a 感应-sensing Thin Film Transistor or a ph〇to_sensing Field Effect Transistor, and the second transistor 130. The third transistor 135 and the fourth transistor 15 are thin film transistors or field effect transistors. In another embodiment, the second transistor 〇 is a light-sensitive thin film transistor or a photo-induced field-effect transistor, and the first transistor 125, the third transistor 135, and the fourth transistor 150 are thin films. A transistor or field effect transistor. The gate voltage Vg is a partial voltage generated by the channel resistance of the level drive voltage vdh and the low level drive voltage vdl via the channel resistance of the first transistor 125 and the channel resistance of the second transistor 13〇, wherein the first transistor 125 The channel resistance or the channel resistance of the second transistor 13 is affected by the illumination. The third transistor 135 drives the voltage Vdh according to the gate voltage and the high level to generate the sensing voltage v-plane e, and the capacitor 14 用来 is used to store the sensing voltage Vsense. As can be seen from the above, the sensing unit 12 can adjust the sensing voltage Vsense according to the light receiving state to adjust the inter-pole Φ voltage vg. The fourth transistor 15 turns the sense voltage v_e into a corresponding read signal according to the scan signal transmitted by the corresponding scan line 101, and feeds the signal to the signal processing unit 195 via the corresponding read line 110. The signal processing unit (9) is configured to apply a complex read signal to the complex readout line 110; the r data is used to generate the touch position signal Spos. In the operation of the sensing unit 120, the first transistor 125, the second transistor, and the third transistor are subjected to a voltage stress applied by a high-level driving driving age 2 or a low-standard 201209659 driving voltage Vdl for a long time. Therefore, it is easy to cause component characteristic shift (such as transistor threshold voltage shift). When the component characteristics of the first transistor 125 or the second transistor 130 are shifted, an error occurs in the generated gate voltage Vg, and the sensing voltage Vsense is also followed by an error, so that the signal processing unit 195 may generate The wrong touch position signal Spos. When the element characteristics of the third transistor 135 are shifted, even if the gate voltage Vg has no error, the generated sensing voltage Vsense may also generate an error. The number processing unit 195 may also generate an erroneous touch position signal Sp〇. s. Note that if the first transistor 125, the second transistor 130, and the third transistor I% are amorphous-Si thin film transistors, it is more likely to cause component characteristic shift under a fixed bias voltage. Fig. 2 is a view showing a second embodiment of a display panel having a light sensing position function according to the present invention. As shown in FIG. 2, the display panel 2A includes a plurality of scanning lines 2m, a plurality of data lines 2〇2, a plurality of elements, a ^2〇5, a plurality of read lines 21〇, a plurality of sensing units, and a voltage supply unit. 290, and a signal processing unit 295. Each scan line 2〇1 is used to transmit the corresponding scan signal. Each data line 2〇2 is used to transmit the corresponding data signal. Each pixel unit 2〇5 is electrically connected to the corresponding scan line and the corresponding data line 2〇2, and is used for controlling the writing operation of the corresponding data signal according to the corresponding scan signal, thereby outputting a corresponding signal, such as a signal. The halogen unit 2〇5 may be a liquid crystal display based pixel unit. The voltage supply unit 290 is for providing the first driving voltage Vcl and the second driving voltage - to the complex sensing list ib 22 。. Each operation cycle of the sensing unit 22A includes a first time period and a second time period, and the first driving voltage Vel is higher than the second driving voltage in the first time period, and the first driving voltage Vcl is in the second time period. Below the second drive voltage ^. 201209659 In the embodiment, the voltage supply unit 290 is configured to provide the first driving voltage Vcl and the second driving voltage Vc2 which are alternating and mutually inverted, that is, when the first driving voltage % is a low level voltage, The second driving voltage Vc2 is a high level voltage and vice versa. In another embodiment, the voltage supply unit 290 is configured to provide a first driving voltage Vcl of the alternating current and a second driving voltage (four) of the direct current, wherein the high level voltage of the first driving voltage is greater than the second driving voltage Ve2′ and The low level voltage of the first driving voltage Vel is lower than the first driving voltage Vc2. In another embodiment, the voltage supply unit 29 is configured to invoke the first driving voltage Vcl of the direct current and the second driving voltage (four) of the alternating current, wherein the two driving voltages of the first driving voltage Ve2 are higher than the first driving voltage. Vel, and the low level voltage of the second driving voltage Vc2 is lower than the first driving voltage Vcl. In the embodiment shown in Fig. 2, each pixel unit 2〇5 is adjacent to the sensing unit 220. In another embodiment, the sensing unit 22 can be set by spacing the plurality of scanning lines 2 ( ), or by spacing the plurality of data lines 202, that is, not each of the pixel units 2 and 5 is sensed. Units 220 are adjacent. Similarly, the readout line 21〇 can be set correspondingly to the multiple data line 2〇2. Each sensing unit no includes a first transistor π5, a second transistor 230, a third transistor 235, a capacitor 240, and a fourth transistor 250. In one embodiment, 'the first transistor 225 is a photo-induced thin film transistor or a photo-induced field-effect transistor', the second transistor 230, the third transistor 235, and the fourth transistor 25 are thin film transistors or Field effect transistor. In another embodiment, the second transistor 23 is a photo-induced thin film transistor or a photo-induced field-effect transistor, and the first transistor 225, the third transistor 235, and the fourth transistor 250 are thin film transistors. Or field effect transistor. In the following, according to the sensing unit DUn-m, the coupling relationship between the components and the circuit operation principle are explained. 201209659 The channel resistance of the first transistor 225 or the channel resistance of the second transistor 230 can be adjusted according to the light receiving state thereof to adjust the gate voltage VGn_m, thereby driving the third transistor 235. The second transistor 235 generates a sensing voltage VDn__m according to the gate voltage vGn_m and the first driving voltage Vcl, and the capacitor 24 is used to store the sensing voltage vDn_m. The fourth transistor 250 outputs the sense voltage VDn_m as the read signal Sr〇-m according to the scan signal sSn transmitted by the scan line SLn, and is fed to the signal processing unit 295 via the sense line rainbow (7). The signal processing unit 295 is for reading the complex read signal (for example, the read signal Sr〇-m fed by the read line RLm and the read from the read line RLj). The signal Sr〇_j) performs signal processing to generate a touch position signal Spos °
第-電晶體225包含第一端、第二端與閘極端，其中第一端 連接於電壓提供單S29G以接收第—驅動電壓Ve卜第二端電是 於第二電晶體230與第三電晶體235，閘極端電連接於第一電㈤ 225之第一端。第-電晶體22s之第二端係用來提供閘極電壓 VGn_m。第一電晶體230包含第一端、第二端與問極端，其中第 端電連接於第-電晶體225之第二端，第二端與閘極端均電連接; 電壓提供單7G 290以接收第二驅動電壓Vc2。第三電晶體故包1 第-端、第二端與閘極端，其中第一端電連接於電麼提供單元四 以接收第-驅動電壓W，第二端電連接於電容㈣與第四電晶爱 250’閘極端電連接於第一電晶體奶之第二端以接收閉極電壓 VGn_m。第二電晶體235之第二端係用來提供感測電壓。 ⑧ 12 201209659 電^24G包含第一端與第二端’其中第-端電連接於第三電晶體235 . 之第一鳊，第二端電連接於電壓提供單元290以接收第二驅動電壓 Vc2。第四電晶體25〇包含第一端、第二端與閉極端，其中第一端 電連接於第二電晶體235之第二端以接收感測電壓y^-瓜，閘極端 電連接於掃描線SLn以接收掃描訊號SSn，第二端電連接於讀出線 RLm第四電晶體250之第二端係用來輸出讀出訊號加—⑺至讀出 線RLm。在一實施例中，電容24〇係可省略，而第三電晶體235之 籲第二端與第二電晶體230之第二端之間係為開路。在另一實施例 中’第四電晶體25(H系可省略，而第三電晶體235之第二端則直接 連接於讀出線RLm，亦即第三電晶體235之第二端所提供之感測電 壓VDn_m係直接輸出為讀出訊號Sr〇_m。 在感測單元DUn一m的運作中，由於第一電晶體225與第二電 晶體230係根據感測單元Dun—m之受光狀態，配合交流且互為反 相之第一驅動電壓Vcl與第二驅動電壓Vc2以提供閘極電壓 VGn一m。也就是說，第一電晶體225與第二電晶體23〇並不會長時 間承受固定之高準位電壓或低準位電壓所施加的電壓應力，所以可 避免第一電晶體225與第二電晶體230發生元件特性偏移現象，進 而避免所產生之閘極電壓VGn_m發生誤差。此外，第三電晶體235 係由閘極電壓VGn一m與第一驅動電壓Vcl所驅動，據以產生威測 電壓VDn_m，而閘極電壓VGn_m與第一驅動電壓Vcl均為交苄電 壓’因此第三電晶體235亦不會長時間承受固定之高準位電壓^施 加的電壓應力， 所以可避免第三電晶體235發生元件特性偏移現The first transistor 225 includes a first end, a second end and a gate terminal, wherein the first end is connected to the voltage supply unit S29G to receive the first driving voltage Ve, and the second end is electrically connected to the second transistor 230 and the third battery. The crystal 235 has a gate terminal electrically connected to the first end of the first electric (five) 225. The second end of the first transistor 22s is used to provide a gate voltage VGn_m. The first transistor 230 includes a first end, a second end and an end, wherein the first end is electrically connected to the second end of the first transistor 225, and the second end is electrically connected to the gate terminal; the voltage is supplied by the single 7G 290 to receive The second driving voltage Vc2. The third transistor is a first end, a second end and a gate terminal, wherein the first end is electrically connected to the power supply unit 4 to receive the first driving voltage W, and the second end is electrically connected to the capacitor (four) and the fourth power The crystal 250' gate is electrically connected to the second end of the first transistor milk to receive the closed voltage VGn_m. The second end of the second transistor 235 is used to provide a sense voltage. 8 12 201209659 The electric terminal 2424 includes a first end and a second end, wherein the first end is electrically connected to the first transistor of the third transistor 235. The second end is electrically connected to the voltage supply unit 290 to receive the second driving voltage Vc2. . The fourth transistor 25A includes a first end, a second end and a closed end, wherein the first end is electrically connected to the second end of the second transistor 235 to receive the sensing voltage y^-guap, and the gate terminal is electrically connected to the scan The line SLn receives the scan signal SSn, and the second end is electrically connected to the read line RLm. The second end of the fourth transistor 250 is used to output the read signal plus (7) to the read line RLm. In one embodiment, the capacitor 24 can be omitted, and the second end of the third transistor 235 is open between the second end of the second transistor 230 and the second end of the second transistor 230. In another embodiment, the fourth transistor 25 (H can be omitted, and the second end of the third transistor 235 is directly connected to the sense line RLm, that is, the second end of the third transistor 235 is provided. The sensing voltage VDn_m is directly outputted as the read signal Sr〇_m. In the operation of the sensing unit DUn-m, since the first transistor 225 and the second transistor 230 are received by the sensing unit Dun-m a state in which the first driving voltage Vcl and the second driving voltage Vc2, which are in alternating current and mutually inverted, are supplied to provide the gate voltage VGn-m. That is, the first transistor 225 and the second transistor 23 are not long. The voltage stress applied by the fixed high-level voltage or the low-level voltage is received, so that the component characteristic shift phenomenon of the first transistor 225 and the second transistor 230 can be avoided, thereby avoiding the error of the generated gate voltage VGn_m. In addition, the third transistor 235 is driven by the gate voltage VGn-m and the first driving voltage Vcl to generate the voltage VDn_m, and the gate voltage VGn_m and the first driving voltage Vcl are both the benzyl voltage' Therefore, the third transistor 235 will not be carried for a long time. Fixed high level voltage ^ applied voltage stress, can be avoided characteristics of a third transistor element 235 is now shifted
13 201209659 象，進而避免所產生之讀出訊號Sro—ms生誤差。總之，在顯示面 板200的運作中，複數感測單元22〇可長時間根據受光狀態而提供 精確的複數讀出訊號，使訊號處理單元295可據以產生精確的觸碰 位置訊號Spos。 第3圖為本發明具光感測定位功能之顯示面板的第三實施例示 意圖。如第3圖所示，顯示面板300係類似於第2圖所示之顯示面 板200，主要差異在於將電壓提供單元29〇置換為電壓提供單元 390 ’以及將複數感測單元220置換為複數感測單元32〇，其中感測 單元DUn一m係被置換為感測單元DWn_m。電壓提供單元390係用 來提供交流驅動電壓Vc3。每一感測單元320包含第一電晶體325、 第二電晶體330、第三電晶體335、電容340、以及第四電晶體350， 其中第-電減3 2 5係為光感應薄膜電晶體或光感應場效電晶體， 第二電晶體330、第三電晶體335與第四電晶體35(M系為薄膜電晶 體或場效電晶體。下文依感測單元〇”11一111說明其内各元件之耦合 關係與電路運作原理。 閘極電壓VGn_m係為交流驅動電壓Vc3與掃描訊號SSn+1經 由第一電晶體325之通道電阻與第二電晶體33〇之通道電阻所產生 之分壓，其中第一電晶體325之通道電阻係受照光影響，亦即閘極 電壓VGn_m可根據第一電Ba體325之通道電阻的受光狀態而調 整。第三電晶體335根據閘極電壓VGn—m與交流驅動電壓Vc3以 產生感測電壓VDn—m，而電谷340則用來儲存感測電壓VDn⑺。 201209659 第四電晶體350根據掃描訊號SSn將感測電壓VDn_m輸出為讀出 訊號Sro-m，經由讀出線RLm饋入至訊號處理單元295。 第一電晶體325包含第一端、第二端與閘極端，其中第一端電 連接於電壓提供單元39〇以接收交流驅動電壓Ve3，第二端電連接 於第二電晶體330與第三電晶體335 ’閘極端電連接於第—電晶體 325之第一端。第一電晶體325之第二端係用來提供閘極電壓 VGn一m。第三電晶體33〇包含第一端、第二端與問極端，其中第一 端電連接於第-電晶體325之第二端，第二端與閘極端均電連接於 掃描線SLn+l以接收掃描訊號SSn+Ι。第三電晶體335包含第一端’、 第二端與_端’其巾第—端電連接於賴提供單元撕以接收交 流驅動電壓Vc3,第二端電連接於電容與第四電晶體现，間 極端電連接於第-電晶體325之第二端以接收閘極電壓ν〇η—⑺。第 三電晶體335之第二端係用來提供感測電壓m。電容34〇包含 第一端與第二端’其中第一端電連接於第三電晶體335之第二端， 第二端電連接於掃描線SLn+1以接收掃描訊號撕+卜第四電晶體 350包含第-端、第二端與閘極端，其中第一端電連接於第三電晶 體335之第二端以接收感測電壓VDn—m，閘極端電連接於掃描線 SLn以接收掃描訊號SSn，第二端電連接於讀出線心。第四電晶 體350之第二端_來輸出讀出訊號Sio—m至讀出線心。在一實 施例中，電容340係可省略，而第三電晶體335之第二端與第二電 aa體330之第二端之間係為開路。在另一實施例中第四電晶體挪 係可省略，而第三電晶體335之第二端則直接連接於讀出線心， 15 201209659 亦P第一電曰曰體335之第一端所提供之感測電壓wn』係直接輸 出為讀出訊號Sro_m。 感測單元DWn一m @運作週期包含第一時段與第二時段，掃描 ‘虎SSn+Ι在第-時段内係高於交流驅動電壓犯，掃描訊號 在第一時段内係低於交流驅動電壓V仏掃描訊號咖+1 包含週期 性正脈波或職性貞脈波。若掃描峨娜+1包含職性正脈波， 則掃描訊號SSn+Ι之脈波時段係對應於交流驅動電壓ve3之低準位 時段。若掃描訊號SSn+1包含週期性負脈波，則掃描訊號.+1之 脈㈣段係對應於交流驅動輕Ve3之高準位時段。顯示面板3〇〇 之其餘電連接關係與魏運作係類同棚示面板2⑻，不再資述。 第4圖為本發明具光感測定位功能之顯示面板的第四實施例示 意圖。如第4圖所示，顯示面板4⑻係類似於第3圖所示之顯示面 板300 ’主要差異在於將複數感測單元,置換為複數感測單元 420 ’其中感測單元DWrun係被置換為感測單元。感測單 元DXn_m係類似於感測單元DWn_m，主要差異在於將第二電晶體 330置換為第二電晶體430，以及將電容34〇置換為電容44〇。第二 電晶體430係為薄膜電晶體或場效電晶體。第二電晶體43〇包含第 一端、第二端與閘極端，其中第一端電連接於第一電晶體325之第 二端’第二端與閘極端均電連接於掃描線SLn以接收掃描訊號 SSn。電容440包含第一端與第二端，其中第一端電連接於第三電 曰曰體335之第二端，第二端電連接於掃描線sLn以接收掃描哎麥 201209659 娜。感測單元DXn_m的運作職包含第—喊與第二時段，掃描 訊號SSn在第-時段内係高於交流驅動電壓，掃描訊號咖^ 第二時段内係低於交流驅動賴Ve3。掃描訊號咖包含週期^正 脈波或週期性負脈波。若掃描訊號SSn包含週期性正脈波，則掃^ 訊號SSn之脈波時段係對應於交流驅動電壓Vc3之低準位時段。^ 掃描訊號SSn包含週期性負脈波，則掃描訊號咖之脈波時段又係= 應於交流驅動電壓Vc3之高準位時段。顯示面板働之其餘電連接 關係與功能運作係類同於顯示面板3〇〇，不再贅述。 、 第5圖為本發明具光感測定位功能之顯示面板的第五實施例示 意圖。如第5圖所示，顯示面板係類似於第2圖所示之顯示面 板200 ’主要差異在於將電壓提供單元29〇置換為電壓提供單元 590 ’以及將複數感測單元22〇置換為複#1感測單元52〇，其中感測 單元DUn_m係被置__單元DYn—m。電紐供單元係用 來提供交流驅動電壓Vc4。每-感測單元52〇包含第—電晶體仍、 第二電晶體530、第三電晶體535、電容54〇、以及第四電晶體％〇， 其中第二電晶體53G係為域麟膜電晶體或光感應場效電晶體， 第-電晶體525、第三電晶體535與第四電晶體55〇係為薄膜電晶 體或場效電晶體。下文依感測單元DYn—mm明其内各元件之輕合 關係與電路運作原理。 間極電壓VGn_m係為掃描tfL號SSn與交流驅動電壓Vc4經由 第-電晶體525之通道電阻與第二電晶體別之通道電阻所產生之 17 201209659 分壓，其甲第二電晶體530之通道電阻係受照光影響，亦即閘極電 壓VGn—m可根據第二電晶體530之通道電阻的受光狀態而調整。 第二電晶體535根據閘極電壓VGn一m與掃描訊號SSn以產生感測 電壓VDn一m，而電容540則用來儲存感測電壓VDn一m。第四電晶 體550根據掃描訊號SSn將感測電壓VDn_m輸出為讀出訊號 Sm_m ’經由讀出線RLm饋入至訊號處理單元295。 第一電晶體525包含第一端、第二端與閘極端，其中第一端電 連接於掃描線SLn以接收掃描訊號SSn，第二端電連接於第二電晶 體530與第三電晶體535，閘極端電連接於第一電晶體525之第二 端。第-電晶體525之第二端係用來提供閘極電壓VGn—m。第二電 :曰體530包含第-端、第二端與閘極端，其中第一端電連接於第一 電曰曰體525之第二端’第二端與閘極端均電連接於電壓提供單元观 以接收交流驅動電壓VC4。第三電晶體535包含第一端、第二端與 間極端，其中第一端電連接於掃描線SLn以接收掃描訊號咖，第 二端電連接於電容540與第四電晶體55〇，閘極端電連接於第一電 =體525之第二端以接收閘極電壓VGn—m。第三電晶體奶之第二 端係用來提供感測賴VDn_m。電容包含第—端與第二端，直 :第:端電連接於第三電晶體535之第二端，第二端電連接於電壓 ，供單元590以接收交流驅動電壓Vc4。第四電晶體包含第一 端、第二端與閘極端，其中第一端電連接於第三電晶體535之第二 端以接收制 VDn_m，_端錢接畴财心以接收掃 描訊號SSn ’第二端電連接於讀出線I。第四電晶體55〇之第二 201209659 端係用來輸出讀出訊號Sro_m至讀出線虹⑺。在一實施例中，電容 540係可省略，而第三電晶體535之第二端與第二電晶體53〇之^ 一端之間係為開路。在另一實施例中，第四電晶體55〇係可省略， 而第二電晶體535之第二端則直接連接於讀出線RLm，亦即第三電 晶體535之第二端所提供之感測電壓vDn—m係直接輸出為讀出訊 號 Sro_m 〇 感測單元DYn一m的運作週期包含第一時段與第二時段，掃描 訊號SSn在第一時段内係高於交流驅動電壓Vc4，掃描訊號SSn在 第二時段内係低於交流驅動電壓Vc4。掃描訊號SSn包含週期性正 脈波或週期性負脈波。若掃描訊號SSn包含週期性正脈波，則掃描 訊號SSn之脈波時段係對應於交流驅動電壓Vc4之低準位時段。若 掃描訊號SSn包含週期性負脈波，則掃描訊號SSn之脈波時段係對 應於交流驅動電壓VC4之高準位時段。顯示面板5〇〇之其餘電連接 關係與功能運作係類同於顯示面板200，不再贅述。 第6圖為本發明具光感測定位功能之顯示面板的第六實施例示 意圖。如第6圖所示，顯示面板600係類似於第5圖所示之顯示面 板500，主要差異在於將複數感測單元52〇置換為複數感測單元 620，其中感測單元DYn_m係被置換為感測單元DZn_m。感測單 元DZn_m係類似於感測單元DYn一m，主要差異在於將第一電晶體 525置換為第一電晶體625’以及將第三電晶體535置換為第三電晶 體635。第一電晶體625與第三電晶體635係為薄膜電晶體或場 201209659 電曰曰體帛電晶體625包含第一端、第二端與閑極端，其 端電連接_描線SLn+1啸收掃描訊號 SSn+l，第二端與閘山 均電連接於第二電晶體530之第一端。第三電晶體635包含第= 端 第二端朗極端，其中第—端電連接於掃描線几㈣以接 、 號SS州，第二端電連接於第四電晶體55〇之第一端，閘極端^ 接於第-電晶體625之第二端。感測單元肠—爪的運作週 第料又與第一時段，掃描訊號SSn+1在第一時段内係高 動電壓VC4，掃描訊號制在第二時段内係低於交流驅動電^ =。掃描訊號SSn+1包含週期性正脈波或週雛負脈波。若掃描 _，n+1包含週期性正脈波’則掃描訊號％㈣之脈波時段係： 應於交流驅動電壓Ve4之低準位時段。若掃描訊號％㈣包含週期 性負脈波’則掃描訊號SSn+1之脈波時段係對應於交流驅動電壓13 201209659 Image, and thus avoid the generated read signal Sro-ms error. In summary, in the operation of the display panel 200, the plurality of sensing units 22 can provide accurate complex read signals for a long time according to the light receiving state, so that the signal processing unit 295 can generate an accurate touch position signal Spos. Fig. 3 is a view showing a third embodiment of a display panel having a light sensing position function according to the present invention. As shown in FIG. 3, the display panel 300 is similar to the display panel 200 shown in FIG. 2, and the main difference is that the voltage supply unit 29 is replaced with the voltage supply unit 390' and the complex sensing unit 220 is replaced with a complex sense. The measuring unit 32 is, wherein the sensing unit DUN-m is replaced with the sensing unit DWn_m. The voltage supply unit 390 is for supplying the AC drive voltage Vc3. Each sensing unit 320 includes a first transistor 325, a second transistor 330, a third transistor 335, a capacitor 340, and a fourth transistor 350, wherein the first-electron reduction 3 2 5 is a light-sensitive thin film transistor Or a photo-induced field effect transistor, a second transistor 330, a third transistor 335 and a fourth transistor 35 (the M system is a thin film transistor or a field effect transistor. Hereinafter, the sensing unit 〇 11 11 111) The coupling relationship between the components and the circuit operation principle. The gate voltage VGn_m is the difference between the AC drive voltage Vc3 and the scan signal SSn+1 via the channel resistance of the first transistor 325 and the channel resistance of the second transistor 33〇. Pressing, wherein the channel resistance of the first transistor 325 is affected by the illumination, that is, the gate voltage VGn_m can be adjusted according to the light receiving state of the channel resistance of the first electric Ba body 325. The third transistor 335 is based on the gate voltage VGn - m and the AC driving voltage Vc3 to generate the sensing voltage VDn_m, and the electric valley 340 is used to store the sensing voltage VDn (7). 201209659 The fourth transistor 350 outputs the sensing voltage VDn_m as the read signal Sro- according to the scanning signal SSn. m, fed through the readout line RLm To the signal processing unit 295. The first transistor 325 includes a first end, a second end and a gate terminal, wherein the first end is electrically connected to the voltage supply unit 39 to receive the AC driving voltage Ve3, and the second end is electrically connected to the second The transistor 330 and the third transistor 335 'gate are electrically connected to the first end of the first transistor 325. The second end of the first transistor 325 is used to provide the gate voltage VGn - m. The third transistor 33 The first terminal and the second terminal are electrically connected to the second end of the first transistor 325, and the second terminal and the gate terminal are electrically connected to the scan line SLn+1 to receive the scan signal SSn. The third transistor 335 includes a first end 'the second end and the _ end', the first end of the towel is electrically connected to the lap providing unit to receive the AC driving voltage Vc3, and the second end is electrically connected to the capacitor and the fourth The transistor is now electrically connected to the second terminal of the first transistor 325 to receive the gate voltage ν〇η-(7). The second terminal of the third transistor 335 is used to provide the sensing voltage m. The first end and the second end are included, wherein the first end is electrically connected to the second end of the third transistor 335 The second end is electrically connected to the scan line SLn+1 to receive the scan signal. The fourth transistor 350 includes a first end, a second end and a gate terminal, wherein the first end is electrically connected to the second transistor 335. The terminal receives the sensing voltage VDn_m, the gate terminal is electrically connected to the scanning line SLn to receive the scanning signal SSn, and the second terminal is electrically connected to the sensing core. The second terminal of the fourth transistor 350 outputs the read signal. Sio-m to the read core. In one embodiment, the capacitor 340 can be omitted, and the second end of the third transistor 335 and the second end of the second electrical aa body 330 are open. In another embodiment, the fourth transistor can be omitted, and the second end of the third transistor 335 is directly connected to the read core, 15 201209659 is also the first end of the first electric body 335. The sense voltage wn provided is directly output as the read signal Sro_m. The sensing unit DWn-m @ operating cycle includes a first time period and a second time period, and the scan 'Tiger SSn+Ι is higher than the AC driving voltage in the first time period, and the scanning signal is lower than the AC driving voltage in the first time period. V仏 scan signal coffee +1 contains periodic positive pulse or job 贞 pulse wave. If the scan 峨 +1 includes the positive pulse wave, the pulse period of the scan signal SSn+Ι corresponds to the low level period of the AC drive voltage ve3. If the scan signal SSn+1 includes a periodic negative pulse wave, the pulse (4) segment of the scan signal +1 corresponds to the high-level period of the AC drive light Ve3. The remaining electrical connection relationship of the display panel 3〇〇 is similar to that of the Wei operating system, and the panel 2 (8) is no longer described. Fig. 4 is a view showing a fourth embodiment of a display panel having a light sensing position function according to the present invention. As shown in FIG. 4, the display panel 4 (8) is similar to the display panel 300 shown in FIG. 3'. The main difference is that the complex sensing unit is replaced with a complex sensing unit 420 'where the sensing unit DWrun is replaced with a sense Measurement unit. The sensing unit DXn_m is similar to the sensing unit DWn_m, the main difference being that the second transistor 330 is replaced with the second transistor 430, and the capacitor 34 is replaced by the capacitor 44A. The second transistor 430 is a thin film transistor or a field effect transistor. The second transistor 43A includes a first end, a second end and a gate terminal, wherein the first end is electrically connected to the second end of the first transistor 325. The second end and the gate terminal are electrically connected to the scan line SLn for receiving. Scan signal SSn. The capacitor 440 includes a first end and a second end, wherein the first end is electrically connected to the second end of the third motor body 335, and the second end is electrically connected to the scan line sLn to receive the scanned buckwheat 201209659. The operation unit of the sensing unit DXn_m includes a first call and a second time period, and the scan signal SSn is higher than the AC drive voltage in the first time period, and the scan signal is lower than the AC drive feedback Ve3 in the second time period. The scan signal coffee contains a period ^ positive pulse or a periodic negative pulse. If the scan signal SSn includes a periodic positive pulse wave, the pulse wave period of the sweep signal SSn corresponds to a low level period of the AC drive voltage Vc3. ^ The scan signal SSn contains a periodic negative pulse wave, and the pulse period of the scan signal is again = the high level period of the AC drive voltage Vc3. The remaining electrical connection relationship and function operation of the display panel are similar to those of the display panel, and will not be described again. Fig. 5 is a view showing a fifth embodiment of the display panel having the light sensing position function of the present invention. As shown in FIG. 5, the display panel is similar to the display panel 200' shown in FIG. 2, and the main difference is that the voltage supply unit 29 is replaced with the voltage supply unit 590' and the complex sensing unit 22 is replaced by a complex # 1 Sensing unit 52A, wherein the sensing unit DUn_m is set to the __ unit DYn_m. The electric button supply unit is used to provide the AC drive voltage Vc4. Each of the sensing units 52A includes a first transistor, a second transistor 530, a third transistor 535, a capacitor 54A, and a fourth transistor %〇, wherein the second transistor 53G is a domain film The crystal or photoinduced field effect transistor, the first transistor 525, the third transistor 535 and the fourth transistor 55 are thin film transistors or field effect transistors. In the following, according to the sensing unit DYn-mm, the light-weight relationship of each component and the circuit operation principle are explained. The inter-electrode voltage VGn_m is a channel generated by the scanning tfL No. SSn and the AC driving voltage Vc4 via the channel resistance of the first transistor 525 and the channel resistance of the second transistor, and the channel of the second transistor 530 is formed. The resistance is affected by the illumination, that is, the gate voltage VGn-m can be adjusted according to the light receiving state of the channel resistance of the second transistor 530. The second transistor 535 generates a sensing voltage VDn of one m according to the gate voltage VGn_m and the scanning signal SSn, and the capacitor 540 stores the sensing voltage VDn-m. The fourth transistor 550 outputs the sense voltage VDn_m as a read signal Sm_m ' according to the scan signal SSn to the signal processing unit 295 via the sense line RLm. The first transistor 525 includes a first end, a second end and a gate terminal, wherein the first end is electrically connected to the scan line SLn to receive the scan signal SSn, and the second end is electrically connected to the second transistor 530 and the third transistor 535. The gate is electrically connected to the second end of the first transistor 525. The second end of the first transistor 525 is used to provide a gate voltage VGn-m. The second battery: the body 530 includes a first end, a second end and a gate terminal, wherein the first end is electrically connected to the second end of the first electrode body 525. The second end and the gate terminal are electrically connected to the voltage supply. The unit is configured to receive the AC drive voltage VC4. The third transistor 535 includes a first end, a second end, and an intermediate end, wherein the first end is electrically connected to the scan line SLn to receive the scan signal, and the second end is electrically connected to the capacitor 540 and the fourth transistor 55, the gate The terminal is electrically connected to the second end of the first electric body 525 to receive the gate voltage VGn-m. The second end of the third transistor milk is used to provide a sense of VDn_m. The capacitor includes a first end and a second end. The first end is electrically connected to the second end of the third transistor 535, and the second end is electrically connected to the voltage for the unit 590 to receive the AC driving voltage Vc4. The fourth transistor includes a first end, a second end and a gate terminal, wherein the first end is electrically connected to the second end of the third transistor 535 to receive the VDn_m, and the receiving end is received to receive the scanning signal SSn ' The second end is electrically connected to the readout line I. The second transistor 55〇 is the second 201209659 terminal for outputting the read signal Sro_m to the readout line rainbow (7). In one embodiment, the capacitor 540 can be omitted, and the second end of the third transistor 535 and the second transistor 53 are open. In another embodiment, the fourth transistor 55 can be omitted, and the second end of the second transistor 535 is directly connected to the read line RLm, that is, the second end of the third transistor 535 is provided. The sensing voltage vDn-m is directly outputted as the read signal Sro_m. The operation period of the sensing unit DYn-m includes the first period and the second period, and the scanning signal SSn is higher than the AC driving voltage Vc4 in the first period, and the scanning The signal SSn is lower than the AC drive voltage Vc4 during the second period. The scan signal SSn contains a periodic positive pulse or a periodic negative pulse. If the scan signal SSn includes a periodic positive pulse wave, the pulse wave period of the scan signal SSn corresponds to a low level period of the AC drive voltage Vc4. If the scan signal SSn includes a periodic negative pulse wave, the pulse period of the scan signal SSn corresponds to the high level period of the AC drive voltage VC4. The remaining electrical connection relationship and function operation of the display panel 5 are similar to those of the display panel 200, and will not be described again. Fig. 6 is a view showing a sixth embodiment of a display panel having a light sensing position function according to the present invention. As shown in FIG. 6, the display panel 600 is similar to the display panel 500 shown in FIG. 5, and the main difference is that the complex sensing unit 52A is replaced by a complex sensing unit 620, wherein the sensing unit DYn_m is replaced with Sensing unit DZn_m. The sensing unit DZn_m is similar to the sensing unit DYn-m, the main difference being that the first transistor 525 is replaced with the first transistor 625' and the third transistor 535 is replaced with the third transistor 635. The first transistor 625 and the third transistor 635 are thin film transistors or fields 201209659. The first phase, the second end and the idle terminal are electrically connected to each other. The scan signal SSn+1 is connected to the first end of the second transistor 530. The third transistor 635 includes a second terminal end of the second end, wherein the first end is electrically connected to the scan line (four) to connect to the SS state, and the second end is electrically connected to the first end of the fourth transistor 55? The gate terminal is connected to the second end of the first transistor 625. The operation unit of the intestine-claw of the sensing unit is again in the first period, the scanning signal SSn+1 is a high-voltage voltage VC4 in the first period, and the scanning signal is lower than the AC driving power in the second period. The scan signal SSn+1 contains a periodic positive pulse or a peripheral negative pulse. If the scan _, n+1 contains a periodic positive pulse ', then the pulse period of the scan signal % (4) is: the low level period of the AC drive voltage Ve4. If the scanning signal %(4) contains a periodic negative pulse wave', the pulse wave period of the scanning signal SSn+1 corresponds to the AC driving voltage.
Vc4之高準位時段。顯示面板_之其餘電連接_與功能運作係 類同於顯示面板5〇〇，不再贅述。 、、’τ上所$ |本發明具;^感測定位功能之顯示面板的運作中， 感測單元係由電壓提供單元所提供之至少—交流驅動電_驅動， 亦即感測單元所包含之複數電晶體均不會長時間承受固定偏壓應 力，據以敎細各電晶财生元件特⑽移縣，進而避免訊號 處理單心樣收之讀出喊發生誤差。換句話說，辭面板之複數 感測單it可長時間根據受絲細提供精麵複數讀出訊號，使訊 號處理單元可據以產生精確的觸碰位置訊號。 201209659 雖然本發明已以實施例揭露如上，然其並非用以限定本發明， 任何具有本發明所屬技術領域之通常知識者，在不脫離本發明之精 神和範圍内，當可作各種更動與潤飾，因此本發明之保護範圍當視 後附之申請專利範圍所界定者為準。 田 【圖式簡單說明】 第1圖為本發明具光感測定位功能之顯示面板的第—實施 意圖。 a歹1不 第2圖為本發明具光感測定位功能之顯示面板的第二實施、 意圖。 不 第3圖為本發明具光感測定位功能之顯示面板的第三實施八 意圖。 W不 第4圖為本發明具光感測定位功能之顯示面板的第四實施 意圖。 也1不 第5圖為本發明具光感測定位功能之顯示面板的第五實施 意圖。 ”不 第6圖為本發明具光感測定位功能之顯示面板的第六實施例示 意圖。 ' 【主要元件符號說明】 100、200、300、顯示面板 21 201209659 400、500、600 101 ' 201 102 、 202 掃描線 資料線 105 ' 205 110 ' 210 晝素單元 讀出線 120、220、320、感測單元 420 > 520 ' 620 125、225、325、第一電晶體 525 ' 625 130、230、330、第二電晶體 430、530 135、235、335、第三電晶體 535 > 635 140、240、340、電容 440、540 150、250、350、第四電晶體 550 190 直流電壓提供單元 195 ' 295 訊號處理單元 290、390、590 電壓提供單元 DUn_m、 感測單元 DWn m ' 22 201209659The high level period of Vc4. The remaining electrical connections of the display panel _ are similar to those of the display panel 5, and will not be described again. In the operation of the display panel of the sense-sensing function, the sensing unit is driven by at least the AC drive motor provided by the voltage supply unit, that is, the sensing unit includes The plurality of transistors will not be subjected to a fixed bias stress for a long time, so that each of the electro-crystalline financial components (10) is moved to the county, thereby avoiding the error of reading and shouting the signal processing. In other words, the plural sensing sub-it of the panel can provide a precise multi-level read signal according to the thinned wire for a long time, so that the signal processing unit can generate an accurate touch position signal. The present invention has been disclosed in the above embodiments, and is not intended to limit the present invention. Any of the general knowledge of the art to which the present invention pertains can be modified and retouched without departing from the spirit and scope of the present invention. Therefore, the scope of the invention is defined by the scope of the appended claims. [Simplified description of the drawings] Fig. 1 is a first embodiment of the display panel having the light sensing position function of the present invention. A歹1 No Figure 2 is a second embodiment of the display panel having the light sensing position function of the present invention. Fig. 3 is a third embodiment of the display panel having the light sensing position function of the present invention. W No. 4 is a fourth embodiment of the display panel having the light sensing position function of the present invention. Also, FIG. 5 is a fifth embodiment of the display panel having the light sensing position function of the present invention. 6 is a schematic view of a sixth embodiment of a display panel having a light sensing position function according to the present invention. ' [Main component symbol description] 100, 200, 300, display panel 21 201209659 400, 500, 600 101 ' 201 102 202 scan line data line 105 ' 205 110 ' 210 pixel unit readout lines 120, 220, 320, sensing unit 420 > 520 ' 620 125, 225, 325, first transistor 525 ' 625 130, 230, 330, second transistor 430, 530 135, 235, 335, third transistor 535 > 635 140, 240, 340, capacitor 440, 540 150, 250, 350, fourth transistor 550 190 DC voltage supply unit 195 '295 signal processing unit 290, 390, 590 voltage supply unit DON_m, sensing unit DWn m ' 22 201209659
DXn m、 DYn—m、DZn—m RLj ' RLm 讀出線 SLn、SLn+1 掃描線 Spos 觸碰位置訊號 Sro」、Sro m 讀出訊號 SSn、SSn+1 掃描訊號 Vcl 第一驅動電壓 Vc2 第二驅動電壓 Vc3、Vc4 交流驅動電壓 Vdh 高準位驅動電壓 Vdl 低準位驅動電壓 Vg、VGn—m 閘極電壓 Vsense、VDn m 感測電壓DXn m, DYn-m, DZn-m RLj ' RLm readout line SLn, SLn+1 scan line Spos touch position signal Sro", Sro m read signal SSn, SSn+1 scan signal Vcl first drive voltage Vc2 Two driving voltages Vc3, Vc4 AC driving voltage Vdh High level driving voltage Vdl Low level driving voltage Vg, VGn - m Gate voltage Vsense, VDn m Sense voltage
23twenty three