Pixel circuit, driving method thereof, array substrate and display device

A technology of pixel circuit and driving method, which is applied in the field of display driving, can solve the problems of short life, lower AMOELD, and low luminous efficiency of blue OLED, and achieve the effect of improving life and prolonging use time

Active Publication Date: 2014-01-01
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the defects of blue OLED materials, blue OLEDs have low luminous efficiency and short lifespan.
Because the blue pixels emit light too poorly, the quality o

Method used

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  • Pixel circuit, driving method thereof, array substrate and display device
  • Pixel circuit, driving method thereof, array substrate and display device
  • Pixel circuit, driving method thereof, array substrate and display device

Examples

Experimental program
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Effect test

no. 1 example

[0104] Such as Figure 7 As shown, the first embodiment of the pixel circuit driving method of the present invention includes:

[0105] Step 71: Divide the blue sub-pixel included in the pixel into N blue organic light-emitting diodes OLED, where N is a positive integer greater than 1;

[0106] Step 72: The driving module drives the N blue OLEDs in time division. The driving module includes a driving circuit for time-division driving the blue sub-pixels.

[0107] It can be understood that the time-divisional driving refers to that the blue sub-pixels or the N blue OLEDs are driven to emit light in at least two time periods. For example: N blue OLEDs can emit light independently in N time periods (N is a positive integer greater than 1); it can also be a positive integer within a certain period of time P (2≤P

[0108] In the first embodime...

no. 2 example

[0110] The second embodiment of the driving method of the pixel circuit described in the present invention is used to drive the second embodiment of the pixel circuit described in the present invention, including:

[0111] dividing the blue sub-pixel included in the pixel into N blue organic light-emitting diodes OLED, where N is a positive integer greater than 1;

[0112] When the absolute value of the voltage difference between the current level output terminal connected to a driving unit and the first level output terminal is greater than the absolute value of the lighting voltage of the blue OLED connected to the driving unit, and except the current When the level output terminal and the level output terminals other than the first level output terminal are suspended, the driving unit drives the blue OLED to emit light.

no. 4 example

[0113] The third embodiment of the driving method of the pixel circuit described in the present invention is used to drive the fourth embodiment of the pixel circuit described in the present invention, including:

[0114] dividing the blue sub-pixel included in the pixel into N blue organic light-emitting diodes OLED, where N is a positive integer greater than 1;

[0115] When the absolute value of the voltage difference between the first level output terminal and a level output terminal is greater than the absolute value of the lighting voltage of the blue OLED connected to the level output terminal, and when the N levels When the voltage difference between the level output terminals other than the level output terminal and the first level output terminal among the output terminals is smaller than the absolute value of the lighting voltage of the blue OLED, the driving circuit drives the blue OLED Color OLED emits light.

[0116] The present invention also provides an array ...

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PUM

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Abstract

The invention provides a pixel circuit, a driving method thereof, an array substrate and a display device. The pixel circuit comprises a plurality of pixels which comprise blue sub pixels and a driving module used for driving the blue sub pixels, wherein the blue sub pixels comprise N blue OLEDs, N is a positive integer and is larger than 1, and the driving module is used for driving the N blue OLEDs in a time sharing mode. The blue sub pixels are partitioned, a part of the blue sub pixels are displayed in each time of display, the service life of the blue sub pixels is prolonged, and therefore the service life of a whole AMOLED panel is prolonged.

Description

technical field [0001] The present invention relates to the technical field of display driving, in particular to a pixel circuit and a driving method thereof, an array substrate and a display device. Background technique [0002] The existing AMOELD (Active Matrix Organic Light Emitting Diode, Active Matrix Organic Light Emitting Diode) panel includes a plurality of pixels, each of which includes a blue pixel unit, a red pixel unit and a green pixel unit, usually, each Each blue pixel unit includes a blue OLED (Organic Light Emitting Diode, organic light emitting diode), each red pixel unit includes a red OLED, and each green pixel unit includes a green OLED. [0003] Commonly used pixel unit drive circuits such as figure 1 As shown, the drive circuit includes two transistors and a capacitor, one of which is a switch tube T1, which is controlled by the scan signal output by the scan line Scan, in order to control the input of the data signal on the data line Data, and the o...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCG09G3/3233G09G2300/0452G09G2300/0809G09G2300/0842G09G2320/0242G09G2320/043G09G2330/08G09G3/2003G09G3/3258G09G2310/08G09G2320/0666
Inventor 任丽君段立业
Owner BOE TECH GRP CO LTD
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