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

A technology of a pixel circuit and a driving method, which is applied in the display field and can solve the problems of uneven luminous brightness of a display panel and the like

Inactive Publication Date: 2019-01-11
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a pixel circuit and its driving method, a display panel, and a display device for the problem of uneven luminance of the display panel caused by different voltage drops on the line.

Method used

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

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Embodiment Construction

[0028] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0029] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected t...

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Abstract

The invention relates to a pixel circuit, including a transistor T1, a transistor T2, a transistor T3, a transistor T4, a transistor T5, a transistor T6, a transistor T7, a capacitor C1, and a light emitting diode D1. The pixel circuit initializes the first electrode plate and the second electrode plate of the capacitor C1 by setting the first light emission control signal and the second light emission control signal, respectively, so as to ensure that the accident states of the pixel circuit are the same. The control terminal of the transistor T1 is compensated by the second reference voltageVref2 through the capacitor C1 so that the driving current flowing through the transistor T1 is related to the second reference voltage Vref2 and independent of the first power supply VDD. Since thedrive current flows through the power supply line, the current on the power supply line-The resistance voltage drop has no effect on the driving current, which can improve the luminescence uniformityof the screen.

Description

technical field [0001] The invention relates to the display field, in particular to a pixel circuit and a driving method thereof, a display panel, and a display device. Background technique [0002] Organic light-emitting display panels are increasingly used in the display field due to their advantages such as high contrast ratio, low power consumption, wide viewing angle, and fast response speed. Generally, an organic light-emitting display panel includes pixel circuits arranged in an array. The pixel circuit usually includes a light-emitting diode D1 and a power supply. The current flowing through the light-emitting diode D1 is related to the power supply voltage. In the display panel, the distance between each light-emitting diode and the power supply is different, so the voltage drop on the line generated during the voltage transmission process is also different, so the actual power supply voltage obtained by each light-emitting diode D1 is different, so the voltage flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3258G09G3/3266
CPCG09G3/3258G09G3/3266G09G3/3233G09G2300/0819G09G2310/0216G09G2320/0233G09G2320/045G09G2320/0626
Inventor 朱正勇范龙飞朱晖
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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