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WO1985003795A1 - Appareil d'affichage de donnees - Google Patents

Appareil d'affichage de donnees Download PDF

Info

Publication number
WO1985003795A1
WO1985003795A1 PCT/JP1985/000070 JP8500070W WO8503795A1 WO 1985003795 A1 WO1985003795 A1 WO 1985003795A1 JP 8500070 W JP8500070 W JP 8500070W WO 8503795 A1 WO8503795 A1 WO 8503795A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
circuit
pulse
light emitting
emitting diode
Prior art date
Application number
PCT/JP1985/000070
Other languages
English (en)
Japanese (ja)
Inventor
Masami Tsuzawa
Muneharu Tominaga
Seizaburo Nagumo
Mitsuru Sakai
Original Assignee
Japan Traffic Management Technology Association
Koito Industries, Ltd.
Stanley Electric Co., Ltd.
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 Japan Traffic Management Technology Association, Koito Industries, Ltd., Stanley Electric Co., Ltd. filed Critical Japan Traffic Management Technology Association
Publication of WO1985003795A1 publication Critical patent/WO1985003795A1/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]

Definitions

  • This lighting relates to an information display device using a light-emitting diode as a display element.]
  • the number and type of light-emitting diodes and the luminous intensity of the light-emitting diodes are increased or decreased according to the surrounding brightness to be visually recognized. It relates to an information display device with improved performance.
  • the display was based on the luminous intensity of the light-emitting diode.
  • Display accuracy such as visibility of information content, is often affected. For example, in the daytime, when the surroundings of the light emitting diode are bright, the visibility is poor unless the light emitting intensity of the light emitting diode is increased. Conversely, at night, the light emitting diode is not bright.
  • the degree of discrimination is different depending on the emission color of the light emitting diode.] Even at the same light emission intensity, red is hard to be distinguished at night, and green and yellow are distinguished. Easy to do. On the other hand, in the daytime, red is easier to distinguish.
  • the luminous intensity of the light-emitting diode is adjusted in order to enhance its visibility and discrimination, and is synchronized with the surrounding brightness.
  • ⁇ light emitting die
  • the luminous intensity of the diode is proportional to the flowing current.
  • a method has been proposed in which the power supply voltage applied to the light emitting diode is changed by utilizing this property, and the current flowing through the light emitting diode is adjusted to change the emission color.
  • the voltage drop at the light emitting diode differs for each light emitting diode having a different emission color depending on the encounter of the constituent substances.] 3.
  • a light emitting diode having a different emission color is required.
  • an information display device configured to emit light by arranging a plurality of light-emitting diodes and displaying information in a mixed color thereof, when the power supply voltage applied to the light-emitting diodes is changed, different types of light-emitting diodes are used. There is a problem that a large difference occurs in the luminous intensity between the light emitting diodes due to the difference in the current flowing through the light emitting diodes.
  • the present invention automatically raises and lowers the luminous intensity in synchronization with the surrounding light without changing the power supply voltage applied to the light emitting diode, thereby improving visibility and discrimination.
  • -It aims to provide an enhanced information display device.
  • Another object of the present invention is to provide an information display device in which the type and number of light emitting diodes driven according to the ambient brightness are changed. thing It is an object.
  • a pulse oscillation circuit that outputs a pulse signal corresponding to the output signal is connected to a photoelectric conversion circuit that receives ambient brightness and converts it into an electric signal. It is designed to drive the light emitting diode by controlling the output time ratio of the pulse oscillation circuit. As a result, the luminous intensity of the light emitting diode is automatically adjusted to the surrounding brightness.
  • a level detection circuit for outputting a signal when the level of the output signal of the photoelectric conversion circuit exceeds a set level. Switch the type and number of light emitting diodes driven by this.
  • FIG. 1 is a circuit diagram showing a preferred information display device according to the present invention
  • FIG. 2 is a timing chart thereof
  • FIG. 3 is a layout diagram of a light emitting diode.
  • FIG. 1 is a circuit diagram showing one embodiment of an information display device according to the present invention.
  • 3 is light that irradiates the periphery of the light emitting diode from outside the information display amount
  • 2 is When the light is illuminated by this light 1 and the amount of light is large, the voltage is increased, and when the amount of light is small, the voltage is reduced and output to the terminal 3 side.
  • Photoelectric conversion circuit! An electrical circuit using sulfuric acid dome, phototransistor, etc.].
  • the voltage controlled oscillator 4 and the level test circuit 8 are connected to this photoelectric conversion circuit 2, and the signal output from the terminal 3 of the photoelectric conversion circuit 2
  • the level verification circuit 8 is composed of a Zener diode, etc.] 3, and outputs a signal to its terminal 9 when the input voltage exceeds a set level.
  • This terminal 9 is connected to the input terminal 10 of the voltage controlled oscillator 4 and connected to one input terminal of the AND circuit 11, and the signal output from the terminal 9 is connected to the voltage controlled oscillator 4. And the input to the AND circuit 11 at the same time.
  • a mono-multi 6 is connected to the other input end of the AND circuits 1 1 so that a signal output from the terminal 7 is input.
  • the mono-multi 6 is connected to the voltage-controlled oscillator 4 is______________________________, and the rising edge of the signal output from the terminal 5 of the voltage-controlled oscillator 4 is input to the terminal 7 by a pulse of t time. It outputs a signal. That is, the oscillation frequency output from the terminal 5 of the voltage-controlled oscillator 4 changes due to the change in the voltage applied to the terminal 3 of the photoelectric conversion circuit 2.
  • a pulse oscillation circuit whose output time ratio changes is configured.
  • the driving circuit of the light emitting diode is connected to this pulse oscillation circuit.
  • a transistor is used as a driving circuit of the light emitting diode.
  • One directly to terminal 7 of monomulti 6 The other is connected indirectly to transistors 13 and 14 via an AND circuit 11, and a pulse signal output from terminal 7 of mono-multi 6 is supplied.
  • the collector and the emitter are configured to be able to conduct while being output to the respective bases, and one of the transistors 13 is provided with a switch 15 and a resistor.
  • a plurality of, for example, yellow light-emitting diodes 19 are connected via a switch 17 and a plurality of transistors are connected to the other transistor 14 via a switch 16 and a resistor 18.
  • a red light emitting diode 20 is connected, and respective light emitting diodes 19 and 20 are connected to a DC power supply 21 to form a circuit.
  • the switch 15 if the switch 15 is connected, the power supplied from the DC power supply passes through the cathode from the anode of the light emitting diode 19, the resistor 17 and the switch. It flows through the switch 15 to the transistor 13, then through its collector and the emitter, to the DC power supply 21, and to the light emitting diode 19. It is driven by a screw to light it, and in this embodiment, it emits yellow light. If a signal is output from terminal 9 of the level test circuit 8 and a pulse signal is output from the terminal 7 of the mono-multi 6, the AND circuit 11 is A pulse signal is output to the terminal 12 side, and the signal is input to the base of the transistor 14, and the signal is input to the base of the transistor 14. While the collector and emitter are in communication.
  • the switch 16 is in contact, the power supplied from the DC power supply 21 passes through the cathode from the light emitting diode 20! ), A resistor 18, a switch 16, a current flowing to a transistor 14, and its collector and emitter.
  • the light is supplied to the DC power supply 21 and the light emitting diode 20 is pulse-driven to light it.
  • red light is emitted. That is, the transistors 13 and 14 constitute a drive circuit for individually driving the light emitting diodes 19 and 20 having different light emitting colors.
  • FIG. 2 shows a timing chart in the above embodiment.
  • the figure below shows the state of the voltage and output waveform of each circuit when the ambient light level is low (7), when the light level is slightly high (a), when the light level is high ( ⁇ ), and The four cases are explained separately.
  • the pulse signal output from terminal 7 of mono multi 6 has a small pulse output time ratio, and The light emitting diode 19 is driven by inputting to the base of the data 13. At this time, the light emitting diode 19 is lit darkly in synchronization with the surrounding brightness because the lighting time ratio is small.
  • the amount of light 1 is small or large, that is, during the period (a)
  • the voltage output to the terminal 3 of the photoelectric conversion circuit 2 becomes small and high.
  • the output frequency of terminal 5 is too high. However, there is no output from terminal 9 because level test circuit 8 does not operate. Therefore, the pulse signal output from pin 7 of mono-multi 6 has a large pulse output time ratio. In addition, only the light emitting diode 19 is driven by inputting to the base of the transistor 13. At this time, the light emitting diode 19 is lit brightly in synchronization with the surrounding brightness because the lighting time ratio is large. If the amount of light 1 is large, the voltage output to the terminal 3 of the photoelectric conversion circuit 2 is high in the period ( ⁇ ) immediately, and the level test circuit 8 is activated and the terminal 9 is connected to the terminal 9. Since the signal is output, the terminal of voltage controlled oscillator 4
  • the output frequency of 5 is low, and the pulse signal output from the terminal 7 of the mono-multi 6 and the terminal 12 of the AND circuit 11 has a small pulse output time ratio. Therefore, the pulse signal output from the terminal 7 of the mono-multi 6 is connected to the base of the transistor 13 and from the terminals 1 and 2 of the AND circuit 11. The output pulse signal is input to the base of the transistor 14 to drive the light emitting diodes 19 and 20, respectively. At this time, the light-emitting diodes 19 and 20 ⁇ have a small ratio of lighting time, but the number of light-emitting diodes 19 and 20 increases, and the brightness of the surroundings increases.
  • the red light emitting diode 20 is lit, the yellow and red lights are mixed, lit brightly in tune with the surrounding brightness, and the visibility is reduced. Higher. Furthermore, when the light amount of the light 1 is very large, that is, in the period of (: ⁇ ), the voltage output to the terminal 3 of the photoelectric conversion circuit 2 is very high, and the level test circuit 8 is also used. It operates and a signal is output to its terminal 9, so that the output frequency of the terminal 5 of the voltage controlled oscillator 4 is high, and the terminal 7 of the mono-multi 6 and the terminal 1 2 of the AND circuit 11 Pulse output from The signal has a large pulse output time ratio.
  • the pulse signal output from the terminal 7 of the mono-multi 6 is output to the base of the transistor 13 and from the terminal 12 of the AND circuit 11
  • the pulse signal is input to the base of the transistor 14 and drives the light emitting diodes 19 and 20 respectively.
  • the frequency of the signal output from the terminal 5 of the voltage controlled oscillator 4 depends on the pulse signal output from the terminal 7 of the monochromat 6 by the light emitting diodes 19 and 20. It is set to a high frequency so that it is not possible to distinguish between ON and OFF due to the afterimage phenomenon in human vision when it is driven and turned on. '
  • Fig. 3 shows an example of the arrangement of light-emitting diodes, and 22 to 30 are yellow light-emitting diodes, for example! ), Connected to the collector of the transistor 13 shown in FIG. 1 via the resistor 17 and the switch 15, and 31 to 39 are, for example, red light emitting diodes. De! Similarly, it is connected to the collector of the transistor 14 shown in FIG. 1 via the resistor 18 and the switch 17. Thus, the switches 16 and 17 connected to each of the light emitting diodes 19 and 20 are connected and disconnected. The desired light emitting diode is switched. By turning on 19 and 20, it is possible to display arbitrary characters, figures, patterns, etc., and furthermore, a light emitting diode according to the surrounding brightness 19. By changing the type and number of 20 and automatically increasing or decreasing the luminous intensity, the visibility of the displayed content can be improved.
  • the voltage-controlled oscillator 4 and the mono-multiplier 6 shown in FIG. 1 are used as one unit so that both the yellow and red light emitting diodes can be driven.
  • a light emitting diode for each type of light emitting diode and change the output time ratio to change the mixed color.
  • Semiconductors such as transistors and SCRs are used in place of the switches 15 and 16, and the type of light emitting diode 1920 is to use a light emitting color other than yellow and red. It is also possible to select one or more types of emission colors.
  • the present invention is configured as described above, the power supply voltage supplied to the light-emitting diode can be changed with a simple configuration, and the light-emitting diode can be easily changed according to the brightness around the light-emitting diode.
  • the number and type of the light emitting diodes are increased and decreased, and the time ratio of the pulses driving the light emitting diodes is controlled.
  • the information display device has a clear display corresponding to the brightness of the installation location as well as a road traffic information board particularly requiring a high degree of visibility. It is suitable for application to various information display boards that need to attract the attention of the viewer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Appareil d'affichage de données utilisant une pluralité de diodes d'émission de lumière (19, 20) comme éléments d'affichage pour afficher des caractères ou des chiffres sous la forme d'une chaîne de points. Les diodes d'émission de lumière (19, 20) sont commandées par un circuit de conversion photoélectrique (2) et par des circuits d'oscillation à impulsions (4, 6) qui sont connectés au circuit de conversion photoélectrique (2) et produisent des signaux d'impulsions en modifiant le rapport du temps de sortie d'impulsions en réponse à des signaux de sortie du circuit (2), si bien que la luminosité des diodes est accordée à la luminosité ambiante (1). Un circuit de détecteur de niveau (8) est également prévu pour changer les types et les nombres de diodes d'émission de lumière devant être attaquées.
PCT/JP1985/000070 1984-02-24 1985-02-20 Appareil d'affichage de donnees WO1985003795A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59/32613 1984-02-24
JP59032613A JPH0723987B2 (ja) 1984-02-24 1984-02-24 情報表示装置

Publications (1)

Publication Number Publication Date
WO1985003795A1 true WO1985003795A1 (fr) 1985-08-29

Family

ID=12363699

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1985/000070 WO1985003795A1 (fr) 1984-02-24 1985-02-20 Appareil d'affichage de donnees

Country Status (4)

Country Link
EP (1) EP0180642A4 (fr)
JP (1) JPH0723987B2 (fr)
KR (1) KR890005189B1 (fr)
WO (1) WO1985003795A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5122781A (en) * 1990-09-06 1992-06-16 Bolan Trading Inc. Hazard warning light

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0654963B2 (ja) * 1986-01-24 1994-07-20 三菱電機株式会社 フラツトマトリクスｃｒｔの輝度調整方式
JPS63137292A (ja) * 1986-11-28 1988-06-09 スタンレー電気株式会社 情報表示板の照度制御方法
FR2615977B1 (fr) * 1987-05-27 1991-11-08 Imerval Sa Equipements embarques pour le traitement et la transmission de donnees
JP2543145Y2 (ja) * 1991-01-16 1997-08-06 日立金属株式会社 フリーアクセスフロア用吊上治具
GB9914575D0 (en) * 1999-06-22 1999-08-25 Secretary Environment Brit Method and apparatus for displaying variable messages to road users
GB9919536D0 (en) * 1999-08-19 1999-10-20 Koninkl Philips Electronics Nv Active matrix electroluminescent display device
JP2012147029A (ja) * 2012-05-07 2012-08-02 Pioneer Electronic Corp 有機ｅｌ装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062398A (fr) * 1973-09-28 1975-05-28
JPS5240995A (en) * 1975-09-29 1977-03-30 Kyodo Micro Ranpu Kk Pulural-distribution luminescent diode lighting equipment
JPS53128297A (en) * 1977-04-14 1978-11-09 Toshiba Corp Display device
JPS5516593U (fr) * 1978-07-18 1980-02-01
JPS5741669U (fr) * 1980-08-21 1982-03-06

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909788A (en) * 1971-09-27 1975-09-30 Litton Systems Inc Driving circuits for light emitting diodes
JPS52143071A (en) * 1976-05-24 1977-11-29 Sanyo Electric Co Ltd Brightness modulation circuit for electronic timepiece
US4340889A (en) * 1980-08-06 1982-07-20 Ford Motor Company Method and apparatus for coordinate dimming of electronic displays
DE3035944C2 (de) * 1980-09-24 1983-06-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Optische Halbleiteranzeigevorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062398A (fr) * 1973-09-28 1975-05-28
JPS5240995A (en) * 1975-09-29 1977-03-30 Kyodo Micro Ranpu Kk Pulural-distribution luminescent diode lighting equipment
JPS53128297A (en) * 1977-04-14 1978-11-09 Toshiba Corp Display device
JPS5516593U (fr) * 1978-07-18 1980-02-01
JPS5741669U (fr) * 1980-08-21 1982-03-06

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0180642A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5122781A (en) * 1990-09-06 1992-06-16 Bolan Trading Inc. Hazard warning light

Also Published As

Publication number Publication date
EP0180642A4 (fr) 1989-06-13
JPH0723987B2 (ja) 1995-03-15
KR890005189B1 (en) 1989-12-16
EP0180642A1 (fr) 1986-05-14
JPS60177395A (ja) 1985-09-11

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