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A pixel circuit, its driving method, and a display device

A technology for pixel circuits and driving transistors, applied in static indicators, instruments, etc., can solve problems such as uneven threshold voltage of transistors, and achieve the effect of voltage drop

Active Publication Date: 2019-09-20
KUNSHAN GO VISIONOX OPTO ELECTRONICS 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 circuit, its driving method, and a display device, which are used to solve the problem of uneven threshold voltage of the transistor due to the uniformity of the transistor process in the prior art.

Method used

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  • A pixel circuit, its driving method, and a display device
  • A pixel circuit, its driving method, and a display device

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Embodiment Construction

[0035] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0036] figure 1 A schematic structural diagram of a pixel circuit provided in an embodiment of the present application. Such as figure 1 As shown, the pixel circuit provided in the embodiment of the present application may include: a light emitting diode D1, a storage capacitor C, a driving transistor T, a first switching transistor T1, a second swi...

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Abstract

The invention discloses a pixel circuit and a driving method thereof and a display device. The pixel circuit comprises a light emitting diode, a storage capacitor, a drive transistor, a first switch transistor, a second switch transistor, a third switch transistor, a fourth switch transistor, a fifth switch transistor and a sixth switching transistor. In a compensation stage of the pixel circuit,a grid electrode and a source electrode of the drive transistor are connected to form an electric current which flows from a second end of the storage capacitor through the drive transistor, the thirdswitch transistor and the fourth switch transistor to an initial voltage signal line, so that voltages of the grid electrode and a drain electrode of the drive transistor are the same, voltages of the source electrode of the drive transistor and the second end of the storage capacitor are the same, wherein the voltage of the second end of the storage capacitor comprises a threshold voltage of thedrive transistor, so that the voltage of the grid source of the drive transistor comprises the threshold voltage, electric currents which flow through the light emitting diode are irrelevant to the threshold voltage of the drive transistor in a light emitting stage of the pixel circuit, so that compensation of the threshold voltage of the drive transistor is achieved.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] An active matrix organic light emitting display device (AMOLED) drives organic light emitting diodes. An active matrix organic display device includes a plurality of pixels arranged at intersections between scan lines and data lines. In addition, each pixel includes an organic light emitting diode and a pixel circuit for driving the organic light emitting diode. A pixel circuit usually consists of multiple switching transistors, drive transistors and storage capacitors. [0003] Due to problems such as the uniformity of the transistor manufacturing process, the threshold voltage of the transistor is not uniform, thereby affecting the display effect of the panel. Moreover, as the size of the AMOLED panel becomes larger, the problem of the voltage drop of the power supply wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233
Inventor 张九占胡思明韩珍珍朱晖
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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