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WO2018196348A1 - Module de rétroéclairage et dispositif d'affichage - Google Patents

Module de rétroéclairage et dispositif d'affichage Download PDF

Info

Publication number
WO2018196348A1
WO2018196348A1 PCT/CN2017/111326 CN2017111326W WO2018196348A1 WO 2018196348 A1 WO2018196348 A1 WO 2018196348A1 CN 2017111326 W CN2017111326 W CN 2017111326W WO 2018196348 A1 WO2018196348 A1 WO 2018196348A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
guide plate
quantum dot
backlight module
dot layer
Prior art date
Application number
PCT/CN2017/111326
Other languages
English (en)
Chinese (zh)
Inventor
邓天应
潘俊
陈细俊
强科文
Original Assignee
深圳Tcl新技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳Tcl新技术有限公司 filed Critical 深圳Tcl新技术有限公司
Publication of WO2018196348A1 publication Critical patent/WO2018196348A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a backlight module and a display device using the same.
  • quantum dot technology can be used to achieve ultra-high color gamut image quality display, so the backlights in most of the existing backlight modules use quantum dots.
  • the conventional quantum dot material is exposed to the air and is easily oxidized, it is necessary to use a barrier material to wrap the quantum dot material. This technique is complicated and costly, and it cannot be widely used in liquid crystal display.
  • the quantum dots are directly close to the light source, resulting in poor thermal reliability; and the quantum dots are used in a large amount, resulting in further increase in cost.
  • An object of the present invention is to provide a backlight module, which aims to obtain a backlight module with good thermal reliability and low cost.
  • a backlight module provided by the present invention includes:
  • each of the light emitting components comprising a light emitting chip and a light transmissive body portion covering the light emitting chip;
  • the optical films are arranged in parallel, wherein a surface of an optical film is provided with a quantum dot layer.
  • Light emitted by the light emitting chip passes through the optical film and the quantum dot layer to generate white light.
  • the light emitting chip comprises a blue LED chip and a green LED chip
  • the quantum dot layer is a red quantum dot layer
  • the light emitting chip comprises a blue LED chip and a red LED chip
  • the quantum dot layer is a green quantum dot layer.
  • the surface of an optical film adjacent to the light-emitting component is provided with the quantum dot layer, and the quantum dot layer faces the light-emitting component.
  • the quantum dot material of the quantum dot layer is a perovskite.
  • the quantum dot layer has a thickness ranging from greater than 0 mm to less than or equal to 0.01 mm.
  • the backlight module further includes a light guide plate adjacent to an end surface of the light guide plate, the optical film facing a surface of the light guide plate, the surface being adjacent to the light guide assembly and the light guide plate The end faces are connected, and the quantum dot layer is disposed on a surface of the optical film facing the light guide plate.
  • the backlight module further includes a reflective sheet, the reflective sheet is attached to a surface of the light guide plate facing away from the optical film, and an end of the reflective sheet abuts the light emitting component.
  • the blue LED chip emits light in a wavelength range of 440 nm to 450 nm.
  • Another object of the present invention is to provide a display device comprising the backlight module as described above.
  • the light source of the backlight module uses the light-emitting chip to excite the quantum dot layer on the optical film to generate white light, and the quantum dot layer is directly disposed on the surface of the optical film, and does not need to be packaged, thereby reducing preparation.
  • Process can increase production efficiency and reduce costs.
  • the light emitted by the light-emitting chip transmits the quantum dot layer after passing through the optical film, and the heat generated by the excited quantum dot layer can be emitted in time without being blocked by the packaging material, thereby improving the thermal reliability of the quantum dot layer.
  • FIG. 1 is a cross-sectional view showing an embodiment of a display device of the present invention
  • FIG. 2 is a cross-sectional view of a light emitting assembly of a backlight module in the display device of FIG. 1.
  • Label name Label name 100 Display device 16 Fixed frame 10 Backlight module 16a Installation space 11 Illuminating component 161 Straight section 111 Light transmissive body 163 Installation section 113 Light emitting chip 1631 Step slot 12 Heat sink 17 Quantum dot layer 13 Light guide 18 A reflective sheet 131 Black strip 19 Circuit board 14 Backplane 30 Display panel 15 Optical diaphragm 50 Front frame
  • first, second, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the terms "connected”, “fixed” and the like should be understood broadly, unless otherwise clearly defined and limited.
  • “fixed” may be a fixed connection, or may be a detachable connection, or may be integrated; It may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship of two elements unless explicitly defined otherwise.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the invention provides a backlight module 10.
  • a backlight module 10 includes:
  • a plurality of light-emitting components 11 each including a light-emitting chip 113 and a light-transmissive body portion 111 that is disposed on the light-emitting chip 113;
  • a plurality of optical films 15 and optical films 15 are arranged in parallel, wherein a surface of an optical film 15 is provided with a quantum dot layer 17,
  • Light emitted from the light-emitting chip 113 passes through the optical film 15 and the quantum dot layer 17, and white light is generated.
  • the backlight of the backlight module 10 may be a side-in type or a direct type.
  • the arrangement of the light-transmitting main body portion 111 can transmit light of the light-emitting chip 113 or protect the light-emitting chip 113.
  • the optical film 15 in the backlight module 10 may include an upper diffusion sheet, a brightness enhancement sheet, a lower diffusion sheet, a prism film, and the like. The optical film 15 is used to modify the light emitted from the light-emitting assembly 11 so that the brightness of the finally emitted light is good and uniform.
  • the light source of the backlight module 10 is used to excite the quantum dot layer 17 on the optical film 15 to generate white light.
  • the quantum dot layer 17 is directly disposed on the surface of the optical film 15, and does not need to be packaged.
  • the treatment reduces the preparation process and can improve production efficiency and reduce costs.
  • the light emitted by the light-emitting chip 113 passes through the optical film 15 and excites the quantum dot layer 17.
  • the heat generated by the excited quantum dot layer 17 can be dissipated in time without being blocked by the packaging material, thereby improving the quantum dot layer 17. Thermal reliability.
  • the light-emitting chip 113 of the present invention includes two color light chips of three primary colors.
  • the light-emitting chip 113 includes a blue LED chip and a green LED chip, and the quantum dot layer 17 is a red quantum dot layer.
  • white light can be formed by mixing blue light, green light and red light. Therefore, the blue LED chip and the green light LED chip emit blue light and green light to jointly excite the red quantum dot layer, and uniform white light can be obtained.
  • the advantages of quantum dots can be utilized, for example, the size of the example is controllable and uniform. The excitation conversion efficiency is high and the light efficiency is high, so that the color gamut of the backlight module 10 can be effectively improved, the demand for high color gamut liquid crystal display is satisfied, and the image quality display effect is remarkably improved.
  • the light emitting chip 113 includes a blue LED chip and a red LED chip, and the quantum dot layer 17 is a green quantum dot layer.
  • the blue LED chip and the red LED chip emit blue light and red light to jointly excite the green quantum dot layer, thereby forming uniform white light.
  • This embodiment also reduces the use of quantum dots while ensuring high color gamut liquid crystal display, thereby also reducing the cost of the backlight module 10.
  • the blue LED chip is used for excitation to ensure the light intensity of the final emitted light.
  • the wavelength of blue light ranges from 400 nm to 480 nm.
  • the wavelength of light emitted by the blue LED chip ranges from 440 nm to 450 nm. The blue light in this wavelength range can also reduce the damage to the human eye while ensuring the intensity of the laser.
  • the material of the quantum dot layer 17 is a perovskite.
  • the quantum dot material in the quantum dot layer 17 is different from the conventional quantum dot material, and the perovskite quantum dot not only has excellent luminescence properties such as full-spectrum luminescence and high quantum efficiency, but also has high oxidation resistance.
  • the performance so that the quantum dot layer 17 can be directly applied to the optical film 15, without using a barrier sheet for protection of water and oxygen barrier, simplifies the process, thereby saving cost.
  • a surface of an optical film 15 adjacent to the light-emitting assembly 11 is provided with a quantum dot layer 17 facing the light-emitting assembly 11.
  • the quantum dot layer 17 is provided on the optical film 15, and may be applied by glue or may be formed by forming a film. Specifically, the quantum dots are applied to the optical film 15 by mixing with the UV glue, and the quantum dots in the quantum dot layer 17 are uniformly dispersed in the UV glue. Selecting the optical film 15 closest to the light-emitting component 11 to coat the quantum dot layer 17 allows the light-emitting chip 113 to directly excite the quantum dot layer 17, so that the excitation efficiency can be improved, and the amount of quantum dots can be reduced, thereby saving cost.
  • the thickness of the quantum dot layer 17 applied to the optical film 15 is set to be uniform.
  • the quantum dot layer 17 has a thickness in the range of more than 0 mm and less than or equal to 0.01 mm. The quantum dot layer 17 in the range can ensure the uniformity of the finally emitted white light and save the quantum dot.
  • the backlight module 10 further includes a light guide plate 13 adjacent to an end surface of the light guide plate 13 .
  • the optical film 15 faces a surface of the light guide plate 13 .
  • the surface is adjacent to the light guide plate 13 .
  • the end faces are connected, and the quantum dot layer 17 is provided on the surface of the optical film 15 facing the light guide plate 13.
  • the backlight is disposed in a side-entry manner, the light-emitting component 11 is located at an end surface of the light guide plate 13, and the optical film 15 is disposed above the light guide plate 13.
  • the backlight module 10 is further provided with a back plate 14 and a fixing frame 16 .
  • the fixing frame 16 is fixed to the periphery of the back plate 14 , and the back plate 14 can be a sheet metal member.
  • the fixing frame 16 can be selected from plastic or metal materials.
  • the diaphragm 15 is mounted and fixed to the fixing frame 16.
  • the fixing frame 16 includes a straight section 161 perpendicular to the backboard 14 and a mounting section 163 extending along the straight section 161.
  • the straight section 161 forms a mounting space 16a with the mounting section 163 and the backboard 14 , and the light emitting component 11 and the light guide plate 13 are mounted on the installation space 16a, and the structure is stable.
  • a heat dissipating member 12 is disposed between the light-emitting assembly 11 and the fixing frame 16, the light guide plate 13 and the back plate 14.
  • the heat dissipating member 12 is made of aluminum material, has good thermal conductivity, is easy to process, and can heat the light-emitting component 11 in time. It is emitted to ensure the service life and working performance of the light-emitting component 11.
  • a side of the mounting section 163 facing away from the backing plate 14 is provided with two stepped grooves 1631.
  • the plurality of optical films 15 are stacked in parallel and mounted on a stepped groove 1631 adjacent to the light guiding plate 13, and are disposed opposite to the light guiding plate 13, and the quantum dots are disposed.
  • the layer 17 is disposed on one side of the optical film 15 on the light guide plate 13, facilitating excitation and improving excitation efficiency.
  • a black rubber strip 131 is disposed between the surface of the light guide plate 13 and the upper surface of the light guide plate 13 for pressing the light guide plate 13 to firmly fix the light guide plate 13, and also prevents light leakage. .
  • the backlight module 10 further includes a reflective sheet 18 attached to a surface of the light guide plate 13 facing away from the optical film 15. The end of the reflective sheet 18 abuts the light-emitting assembly 11.
  • the base material of the reflective sheet 18 is generally polyethylene terephthalate (PET), and a reflective sheet 18 is disposed on the lower surface of the light guide plate 13, so that the unscattered light can be reflected again into the light.
  • the conductive region enters the light guide plate 13 and is emitted from the light guide plate 13 toward the surface of the optical film 15.
  • the reflection of the reflective sheet 18 is specular reflection to improve the utilization of the light-emitting assembly 11.
  • the end of the reflection sheet 18 abuts against the light-emitting assembly 11, and the light diverged by the light-emitting assembly 11 can be reflected, thereby further improving the utilization of light.
  • the backlight module 10 further includes a circuit board 19, and the plurality of light emitting components 11 are uniformly distributed on the circuit board 19.
  • the circuit board 19 is arranged to increase the power support of the light-emitting component 11, and other components for control can be disposed on the circuit board 19.
  • the circuit board 19 is parallel to the side of the backlight module 10, and the plurality of light-emitting components 11 are uniformly disposed on the circuit board 19, so that the provided backlight is uniformly stabilized, so that the final light intensity is evenly distributed in each part.
  • Another object of the present invention is to provide a display device 100 including a backlight module 10 and a display panel 30.
  • the backlight module 10 is the backlight module 10, and the display panel 30 is disposed on the optical film. 15 faces away from the side of the light guide plate 13. Since the backlight module 10 of the display device 100 adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are not repeatedly described herein.
  • the display panel 30 is a liquid crystal display panel 30, and the substrate is made of glass.
  • the display panel 30 is disposed on the mounting section 163 of the fixing frame 16, specifically, in the stepped groove 1631 away from the light guide plate 13, and the optical film.
  • the sheets 15 are arranged in parallel and completely cover the optical film 15, so that the light emitted by the backlight module 10 is entirely emitted by the display panel 30, thereby improving the picture quality.
  • the display device 100 is further provided with a front frame 50 which is made of a metal material to ensure the stability of the structure of the display device 100.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Un module de rétroéclairage (10) et un dispositif d'affichage (100), le module de rétroéclairage (10) comprenant : une pluralité de montages électroluminescents (11), chaque montage électroluminescent (11) comprenant une puce électroluminescente (113) et une partie de corps de transmission de lumière (111) qui recouvre la puce électroluminescente (113); une pluralité de feuilles de film optique (15), les feuilles de film optique (15) étant empilées en parallèle, et une surface d'une feuille de film optique (15) étant pourvue d'une couche de points quantiques (17); la lumière qui est émise par la puce électroluminescente (113) passe à travers une feuille de film optique (15) et la couche de points quantiques (17) pour générer une lumière blanche, ayant une bonne fiabilité thermique et étant peu coûteuse.
PCT/CN2017/111326 2017-04-28 2017-11-16 Module de rétroéclairage et dispositif d'affichage WO2018196348A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201720471478.1U CN206805066U (zh) 2017-04-28 2017-04-28 背光模组和显示装置
CN201720471478.1 2017-04-28

Publications (1)

Publication Number Publication Date
WO2018196348A1 true WO2018196348A1 (fr) 2018-11-01

Family

ID=60738943

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/111326 WO2018196348A1 (fr) 2017-04-28 2017-11-16 Module de rétroéclairage et dispositif d'affichage

Country Status (2)

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CN (1) CN206805066U (fr)
WO (1) WO2018196348A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI693455B (zh) * 2019-04-10 2020-05-11 瑞軒科技股份有限公司 發光二極體背光模組

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109887410B (zh) * 2019-03-28 2021-03-12 厦门天马微电子有限公司 一种显示装置及显示装置的制作方法
CN113777831A (zh) 2021-09-14 2021-12-10 武汉华星光电技术有限公司 显示面板及电子装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007149500A (ja) * 2005-11-28 2007-06-14 Sony Corp 光源装置、表示装置、及び光源装置の製造方法
KR20120088273A (ko) * 2011-01-31 2012-08-08 엘지이노텍 주식회사 백라이트 유닛 및 그 제조 방법
CN103408984A (zh) * 2013-08-22 2013-11-27 广东普加福光电科技有限公司 光学涂层组合物、荧光光学膜片及其制备方法
CN105467673A (zh) * 2015-12-21 2016-04-06 南京先进激光技术研究院 量子点背光源及液晶显示装置
CN106501999A (zh) * 2016-11-11 2017-03-15 张家港海纳至精新材料科技有限公司 光学膜组和背光模块

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007149500A (ja) * 2005-11-28 2007-06-14 Sony Corp 光源装置、表示装置、及び光源装置の製造方法
KR20120088273A (ko) * 2011-01-31 2012-08-08 엘지이노텍 주식회사 백라이트 유닛 및 그 제조 방법
CN103408984A (zh) * 2013-08-22 2013-11-27 广东普加福光电科技有限公司 光学涂层组合物、荧光光学膜片及其制备方法
CN105467673A (zh) * 2015-12-21 2016-04-06 南京先进激光技术研究院 量子点背光源及液晶显示装置
CN106501999A (zh) * 2016-11-11 2017-03-15 张家港海纳至精新材料科技有限公司 光学膜组和背光模块

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI693455B (zh) * 2019-04-10 2020-05-11 瑞軒科技股份有限公司 發光二極體背光模組
US11079629B2 (en) 2019-04-10 2021-08-03 Amtran Technology Co., Ltd. LED backlight module

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