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Pixel circuit and driving method thereof and display device

A technology of pixel circuit and drive transistor, which can be applied to static indicators, instruments, etc., and can solve the problems of OLED life-span loss

Active Publication Date: 2017-06-20
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In conventional OLED display devices, RGB (red, green and blue) evaporated materials are different, and the luminous characteristics of different materials are also different, so the luminous life of RGB is also different, so the effective luminous area of ​​RGB is the same, although In this way, due to the specific display conditions, such as long-term display with strong light effect, the life of OLED will be greatly reduced

Method used

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  • Pixel circuit and driving method thereof and display device
  • Pixel circuit and driving method thereof and display device
  • Pixel circuit and driving method thereof and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0065] This embodiment provides a pixel circuit such as figure 1 As shown, the pixel circuit of this embodiment includes: a light sensing control module 10, a light emission control module 20 and a light emission module 30, wherein,

[0066] The light-sensing control module 10 is connected to the control signal terminal EM1, the first potential terminal VGH, and the light-emitting control module 20 respectively. The light-sensing control module 10 is used to receive the light from the light-emitting module 30, and generates corresponding electrical signals and signals according to the light intensity signal. Provide the signal of the first potential terminal VGH to the lighting control module 20 under the control of the regulation signal terminal EM1;

[0067] The light emission control module 20 is connected to the light emission control signal terminal EM, the light sensing control module 10 and the light emitting module 30 respectively, and the light emission control module...

Embodiment 2

[0070] Such as figure 2 As shown, the photosensitive control module 10 in this embodiment includes: a first reset unit 11, a second storage unit 12, a control unit 13 and a photosensitive unit 14, wherein,

[0071] The first reset unit 11 is respectively connected to the first scanning signal terminal Scan1, the second potential terminal Vcom and the second node N2, and is used to provide the signal of the second potential terminal Vcom to the second node under the control of the first scanning signal terminal Scan1. Two nodes N2;

[0072] The second storage module 12 is respectively connected to the second node N2 and the second potential terminal Vcom; the second storage module 12 is used for charging or discharging under the control of the signal of the second node N2 and the signal of the second potential terminal Vcom;

[0073] The photosensitive unit 14 is respectively connected to the second node N2 and the low potential terminal Vss, the photosensitive unit 14 is use...

Embodiment 3

[0087] In specific implementation, in the above-mentioned pixel circuit provided by the embodiment of the present invention, as image 3 Shown:

[0088] The second reset unit 21 includes a first switching transistor M1, wherein the control electrode of the first switching transistor M1 is connected to the first scan signal terminal Scan1, the first electrode of the first switching transistor M1 is connected to the initialization signal terminal Vinit, and the first The second pole of the switching transistor M1 is connected to the first node N1.

[0089] The first storage unit 22 includes a first capacitor C1, wherein the first capacitor C1 is connected between the first node N1 and the third potential terminal Vdd.

[0090] The compensation unit 23 includes a second switch transistor M2, wherein the control electrode of the second switch transistor M2 is connected to the second scanning signal terminal Scan2, the first electrode of the second switch transistor M2 is connecte...

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Abstract

The invention provides a pixel circuit comprising a luminescent control module, a light perception regulation and control module and a luminescent module. The light perception regulation and control module is connected with a regulation and control signal end, a first potential end and the luminescent control module. The light perception regulation and control module is used for receiving illumination of the luminescent module and providing the signal of the first potential end to the luminescent control module under the control of the corresponding electric signal generated according to an illumination intensity signal and the regulation and control signal end. The luminescent control module is connected with a luminescent control signal end, the light perception regulation and control module and the luminescent module. The luminescent control module is used for controlling the luminescent module to emit light under the control of the signal provided by the luminescent control signal end and the light perception regulation and control module. According to the scheme, the luminescent module can be periodically and intermittently adjusted to emit light so that reduction of the service life of a luminescent device caused by strong light emission of EL material can be alleviated.

Description

technical field [0001] Embodiments of the present invention relate to but are not limited to the field of display technology, and in particular, refer to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] Active-Matrix Organic Light Emitting Diode (AMOLED) is one of the hotspots in the field of flat panel display research today. Compared with liquid crystal displays, OLED (Organic Light-Emitting Diode, organic light-emitting diode) has low energy consumption, With the advantages of low production cost, self-illumination, wide viewing angle and fast response speed, OLED has begun to replace the traditional LCD (Liquid Crystal Display, Liquid Crystal Display) in display fields such as mobile phones, PDAs (Personal Digital Assistants), and digital cameras. monitor) display. [0003] In conventional OLED display devices, RGB (red, green and blue) evaporated materials are different, and the luminous characteristics of different materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3225
CPCG09G3/3225G09G2320/0633G09G2330/04
Inventor 杨盛际董学吕敬陈小川刘冬妮王磊付杰卢鹏程岳晗肖丽
Owner BOE TECH GRP CO LTD
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