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Pixel driving circuit and display panel

A technology of pixel drive circuit and drive module, which can be applied to static indicators, instruments, etc., and can solve problems such as uneven brightness of the screen

Active Publication Date: 2020-07-10
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present application provides a pixel driving circuit and a display panel to alleviate the technical problem of uneven brightness of the picture in the existing display panel

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  • Pixel driving circuit and display panel

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Embodiment Construction

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the a...

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Abstract

The invention provides a pixel driving circuit and a display panel. A first input end of a driving module in the pixel driving circuit and a data input module are connected to a first point; the second input end of the driving module is connected to a second power supply signal input end; the third input end of the driving module and a detection module are connected to a second point; the output end of the driving module, the detection module and the cathode of a luminescent device are connected to a third point; the anode of the luminescent device is connected to a first power supply signal input end; in a first detection time period, a power supply low-potential signal is input into the first power supply signal input end; a power supply high-potential signal is input into the second power supply signal input end; in the second detection time period and the display time period, a power supply high-potential signal is input into the first power supply signal input end, a power supplylow-potential signal is input into the second power supply signal input end, and in the light emitting stage of the display time period, in the pixel driving circuits corresponding to different sub-pixels, the voltage value of the output end of the driving module is within a preset range. According to the invention, the display brightness of each part of the display panel is uniform, and the detection accuracy is high.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a pixel driving circuit and a display panel. Background technique [0002] In the existing OLED or Inverted-LED display panels, the cathodes of the light-emitting devices corresponding to each sub-pixel are connected to the power supply low potential signal VSS, and the anodes are respectively connected to the 3T1C pixel driving circuit, wherein the driving transistor in the pixel driving circuit is used for To drive the light-emitting device to emit light, the threshold voltage Vth of the driving transistor will drift due to various reasons, so usually the first detection period between power-on or after power-off, and the second detection time period between adjacent display frames, Comprehensive compensation is performed on the threshold voltage Vth of the driving transistor. However, the distance between the cathodes of the light-emitting devices at different posi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3208
CPCG09G3/32G09G3/3208G09G2320/0233G09G3/3225G09G2300/0819G09G2300/0842G09G2300/0861G09G2310/0251G09G2300/0866G09G2320/0295G09G3/3291G09G3/006G09G3/3258G09G2330/12
Inventor 王利民黄泰钧王振岭
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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