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Organic electroluminescent display panel, driving method thereof and display device

An electroluminescence display and display panel technology, applied in the computer field, can solve the problem of uneven brightness and darkness of the display screen

Active Publication Date: 2017-12-15
WUHAN TIANMA MICRO ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an organic electroluminescence display panel, its driving method, and a display device to solve the problem of uneven brightness and darkness of the display screen due to the time of the front and rear corridors in the dimming mode existing in the prior art

Method used

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  • Organic electroluminescent display panel, driving method thereof and display device
  • Organic electroluminescent display panel, driving method thereof and display device
  • Organic electroluminescent display panel, driving method thereof and display device

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Embodiment 1

[0069] In actual implementation, in the driving method of the organic electroluminescent display panel provided by the embodiment of the present invention, the front and rear corridor time N can be shortened, that is, the adjustment time of the driving circuit (IC) can be shortened as much as possible, so that the front and rear corridor time N does not exceed 1% of the scanning time M of the display area, then 1≤k≤0.01M / A.

[0070] Specifically, for a display screen with a resolution of X*Y, where X is the total number of lines in the display area, the number of lines in the front and back corridors generally does not exceed 1% of the total number of lines X corresponding to the resolution, then 1≤k≤0.01 X / A, k is an integer greater than or equal to 0, and A is the least common multiple of periods of clock signals in the gate drive circuit of the organic electroluminescence display panel. At this time, although there will be a certain difference in the number of bright and da...

Embodiment 2

[0072]In the specific implementation, in the industry, the difference in brightness is 1 / 20 of the total light emission as a judgment standard. The human eye is not sensitive to the difference in brightness not greater than 1 / 20 of the total light emission, that is, the human eye cannot distinguish the brightness difference not greater than 1 / 20 of the total light emission. 1 / 20th of the difference in brightness of the glow. Based on this, in the driving method of the above-mentioned organic electroluminescent display panel provided by the embodiment of the present invention, the front and rear corridor time N can be set to be no more than 5% of the total scanning time of the number of light-emitting rows, that is, N / (a*M )≤1 / 20, then 1≤k≤0.05a*M / A; wherein, a is the duty cycle of the effective light-emitting signal in the period of the light-emitting control signal, if the low-voltage signal part of the light-emitting control signal controls the pixel circuit to emit light, T...

Embodiment 3

[0075] In specific implementation, in the driving method of the above-mentioned organic electroluminescent display panel provided by the embodiment of the present invention, in order to ensure that the number of pixels in the light-emitting state in the display panel is the same at any time, that is, to ensure that at any time the display area The number of lines of bright and dark stripes remains stable, and the voltage drop of the high-voltage power supply signal (PVDD) keeps stable at all times, making the picture uniform, thereby completely eliminating the bright band mura. Specifically, the front and rear corridor time N can be set as a multiple of a lighting cycle of the lighting control signal, that is, to ensure that only complete b lighting cycles enter the front and rear corridor time N, that is, N=M*b / (n-b), then k= b*M / ((n-b)*A); wherein, b is a positive integer, and n is the number of light-emitting periods.

[0076] Further, in the driving method of the organic e...

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Abstract

The invention discloses an organic electroluminescent display panel, a driving method thereof and a display device, driving in a dimming mode and dividing the scanning time for each frame into the display area scanning time and the front and back porch time. In the display area scanning time, the pixel circuits in the display area of the organic electroluminescent display panel can be scanned, and the driving circuit adjusts in the front and back porch time. By controlling the front and back porch time, and under the condition of guaranteeing the front and back porch time to be less than the display area scanning time, the front and rear porch time is guaranteed to be a common multiple of each clock signal period in the gating drive circuit of the organic electroluminescent display panel, so that the switching between the front and rear porch time and the display area scanning time does not cross the clock signal cycles to ensure the integrity of the clock signal cycles in different time periods. Therefore, the problem of inconsistencies in display brightness caused by the disorder of the generated driving signal caused by the incomplete clock signal cycles in different time periods can be prevented.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to an organic electroluminescence display panel, a driving method thereof and a display device. Background technique [0002] At present, in display devices such as mobile phone products that use organic electroluminescent display panels, in order to eliminate afterimages and speed up response time, dimming mode is generally used for driving, so that the display of organic electroluminescent display panels The area presents alternating light and dark stripes that scroll down continuously (that is, the displayed picture continuously moves downward). [0003] In the signal sequence of the organic electroluminescent display panel, in addition to the normal display time (corresponding to the scan time of the display area) in each frame scanning time, there is also a period of time set as the front and rear corridor time. Make the driver circuit (IC) adjust. When the dimming mode is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208G09G3/3266
CPCG09G3/3208G09G3/3266G09G2320/0233G09G2310/0224G09G2310/08G11C19/28G09G2310/0232G09G2310/0286G09G2320/0653G09G2310/0264
Inventor 向东旭李玥陈泽源孔祥梓周星耀冷传利李元
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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