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

A technology for pixel circuits and control terminals, applied in the fields of display devices, pixel circuits and their control methods, and display panels, can solve problems such as uneven light emission of display panels, and achieve the effect of improving uniformity

Inactive Publication Date: 2019-01-04
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 control method, a display panel, and a display device for the problem of uneven light emission of the display panel due to the voltage drop on the line.

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

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Embodiment Construction

[0027] 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.

[0028] 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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PUM

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Abstract

The invention relates to a pixel circuit, a control method thereof, a display panel and a display device. The pixel circuit includes a transistor T1, a transistor T2, a transistor T3, a transistor T4,a transistor T5, a transistor T6, a transistor T7, a transistor T8, a transistor T9, a capacitor C1, and a light emitting diode D1. The pixel circuit uses a second reference voltage Vref2 to compensate a control terminal of the transistor T1 through the capacitor C1 so as to make a driving current flowing through the transistor T1 is related to the second reference voltage Vref2 and independent of first power supply VDD. Since the driving current flows through a power supply line, when the driving current is independent of first power supply VDD, current-resistance voltage drop on the power supply line has no effect on the driving current, thereby improving the illumination uniformity of a screen.

Description

technical field [0001] The present invention relates to the display field, in particular to a pixel circuit and a control 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 volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3266G09G3/3233
CPCG09G3/3233G09G3/3266G09G2320/0233G09G2300/0819G09G2320/045
Inventor 朱正勇赵国华朱晖
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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