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Pixel driving circuit and display panel

A pixel driving circuit and electrode technology, applied to static indicators, instruments, etc., can solve the problems of not being able to achieve high contrast and uniform brightness at the same time, and achieve the effect of shortening the lighting time and compensating for the difference in threshold voltage

Active Publication Date: 2021-01-15
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a pixel driving circuit and a display panel to alleviate the technical problem that high contrast and uniform brightness cannot be realized simultaneously in the existing display panel

Method used

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  • Pixel driving circuit and display panel

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Embodiment Construction

[0029] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [up], [down], [front], [rear], [left], [right], [inner], [outer], [side], etc., are only for reference Additional schema orientation. Therefore, the directional terms used are for describing and understanding the present invention, not for limiting the present invention. In the figures, units with similar structures are denoted by the same reference numerals.

[0030] The present invention provides a pixel driving circuit and a display panel to alleviate the technical problem that high contrast ratio and uniform brightness cannot be simultaneously achieved in the existing display panel.

[0031] LED devices have the characteristics of high brightness and long life, and are widely used in the field of display technology. Due to the low contr...

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Abstract

The present invention provides a pixel driving circuit and a display panel. The pixel driving circuit includes: a reference voltage input module, used to input a reference voltage to a first point in a first working state; connection, for emitting light under the control of the second control signal and the potential of the first point; the sensing module, connected with the light emitting module through the second point, for sensing the threshold voltage of the light emitting module; the storage capacitor module, through the first point , the second point and the third point are connected to the light-emitting module for storing the threshold voltage of the light-emitting module; the data signal input module is connected to the reference voltage input module and the light-emitting module through the first point, and is used to send The first point inputs data signals; wherein, the reference voltage input module is also used to control the light emitting module to stop emitting light in the third working state after the light emitting module emits light. The invention can simultaneously improve the picture uniformity and realize high contrast.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a pixel driving circuit and a display panel. Background technique [0002] LED devices have the characteristics of high brightness and long life, and are widely used in the field of display technology. Due to the low contrast of LEDs at low gray scales, the existing LED driving methods use PWM dimming technology to shorten the LED light-emitting time, thereby achieving more accurate gray scale distinction. However, this driving method cannot compensate for the threshold voltage of the driving transistor. The difference will cause uneven brightness of the picture when displayed. [0003] Therefore, the existing display panel has the technical problem of not being able to achieve high contrast ratio and uniform brightness at the same time, and needs to be improved. SUMMARY OF THE INVENTION [0004] The present invention provides a pixel driving circuit and a displ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
CPCG09G3/32G09G3/2081G09G2300/0819G09G2300/0852G09G2320/066G09G2300/0426G09G2300/0842G09G2310/08G09G2320/0233
Inventor 杨波梁鹏飞
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD