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

A pixel circuit and circuit technology are applied in the fields of pixel circuits and driving methods, display devices, and display substrates, and can solve the problems of poor uniformity of display brightness and poor display effect of OLED display panels, so as to avoid uneven display brightness and ensure show effect

Active Publication Date: 2019-07-12
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a pixel circuit and its driving method, a display substrate, and a display device, which can solve the problems of poor display brightness uniformity and poor display effect of OLED display panels in the related art

Method used

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

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Embodiment Construction

[0062] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0063] The transistors used in all the embodiments of the present invention can be thin film transistors or field effect transistors or other devices with the same characteristics, and the transistors used in the embodiments of the present invention are mainly switching transistors according to their functions in circuits. Since the source and drain of the switching transistor used here are symmetrical, the source and drain are interchangeable. In the embodiment of the present invention, the source is referred to as the first electrode, and the drain is referred to as the second electrode, or the drain may be referred to as the first electrode, and the source is referred to as the second electrode. According to the form in the accompan...

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Abstract

The invention discloses a pixel circuit and a driving method thereof, a display substrate and a display device. Because the light-emitting control circuit can output a direct-current power supply signal provided by the direct-current power supply end to the second node and control the third node to be conducted with the light-emitting element, the compensation circuit can adjust the potential of the first node according to the potential of the second node or the third node. Therefore, when the pixel circuit is driven, the potential finally written into the first node is only related to the threshold voltage of the driving transistor, the potential of the data signal provided by the data signal end and the potential of the target node. Moreover, the driving signal output by the driving circuit is related to the potential difference between the first node and the target node, so that the driving signal output by the driving circuit is irrelevant to the potential of the target node, namely the potential of the direct-current power supply signal. Therefore, the problem that the display brightness of the display panel is not uniform due to reduction of transmission of the potential of the direct-current power supply end is avoided, and the display effect of the display panel is good.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit and a driving method thereof, a display substrate, and a display device. Background technique [0002] Organic light emitting diode (OLED), as a current-mode light-emitting device, has been increasingly used in high-performance display panels due to its low energy consumption, self-luminescence, fast response, and wide viewing angle. middle. [0003] In the related art, an OLED display panel includes pixel units arranged in an array, and each pixel unit includes: a switching transistor, a driving transistor and an OLED. The switch transistor can output the data signal provided by the data signal terminal to the driving transistor, and the driving transistor can output a driving current to the OLED according to the DC power signal and the data signal provided by the DC power supply terminal to drive the OLED to emit light. [0004] However, since the pot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3258
CPCG09G3/3258G09G3/3233G09G2300/0819G09G2300/0842G09G2300/0861G09G3/3266G09G3/3275G09G2300/0426H10K59/1216
Inventor 陈帅唐秀珠张智刘丰伟
Owner BOE TECH GRP CO LTD
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