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

A pixel circuit and circuit technology, applied in static indicators, instruments, etc., can solve problems such as uneven brightness, affecting display quality, and differences

Active Publication Date: 2020-12-29
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors have found that due to the limitation of the manufacturing process of the driving transistor, there are differences in the threshold voltage and mobility of different driving transistors, so that the current flowing through the light-emitting device will vary due to the difference in the threshold voltage and mobility of the driving transistor. different, resulting in uneven brightness and affecting display quality

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0050] An embodiment of the present invention provides a pixel circuit, figure 1 A connection schematic diagram of a pixel circuit provided by an embodiment of the present invention, figure 2 A schematic structural diagram of a pixel circuit provided for an embodiment of the present invention, such as figure 1 and figure 2 As shown, the pixel circuit provided by the embodiment of the present invention is connected with an external control circuit and a light emitting element. The external control circuit includes: a data signal terminal Data, a detection signal terminal Sense, a scanning signal terminal Gate, a first control terminal G1, a second control terminal terminal G2, the first switch control terminal SW1 and the second switch control terminal SW2, the pixel circuit includes: a light emission control subcircuit, a driving transistor DTFT, a first compensation subcircuit, a second compensation subcircuit, a power supply selection subcircuit, a first power supply ter...

Embodiment 2

[0092] Based on the inventive concepts of the above-mentioned embodiments, the embodiments of the present invention further provide a method for controlling a pixel circuit, which is used in the pixel circuit provided in Embodiment 1, Figure 10 A flowchart of a control method for a pixel circuit provided in an embodiment of the present invention, such as Figure 10 As shown, the pixel circuit control method provided by the embodiment of the present invention specifically includes the following steps:

[0093] Step S1, by controlling the scan signal terminal, the data signal terminal, the first control terminal, the second control terminal, the detection signal terminal and the first switch control terminal to obtain the threshold voltage and mobility of the driving transistor.

[0094] Specifically, step S1 includes: when the external control circuit controls the turn-on of the first switching transistor through the scan control terminal, output the first data signal to the f...

Embodiment 3

[0100] Based on the inventive concepts of the above embodiments, the embodiments of the present invention further provide a display device, Figure 11 A schematic structural diagram of a display device provided for an embodiment of the present invention, such as Figure 11 As shown, the display device provided by the embodiment of the present invention includes: the pixel circuit provided by the first embodiment.

[0101] Specifically, the display device may include a display substrate, and the pixel circuits may be disposed on the display substrate. Preferably, the display device may be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.

[0102] Wherein, the display device provided by the embodiment of the present invention includes the pixel circuit provided by the first embodiment, and its implementation principle and effect are similar, ...

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PUM

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Abstract

The invention discloses a pixel circuit, a control method thereof, and a display device, wherein the circuit is connected with an external control circuit and a light-emitting element, and the external control circuit includes: a data signal terminal, a detection signal terminal, a scanning signal terminal, a first control terminal, the second control terminal, the first switch control terminal and the second switch control terminal, the external control circuit is used to control the scan signal terminal, the data signal terminal, the first control terminal, the second control terminal, the detection signal terminal and the second control terminal A switch control terminal, which obtains the threshold voltage and mobility of the driving transistor, and obtains a compensation voltage according to the threshold voltage and mobility, and is also used to control the scanning signal terminal, the data signal terminal and the second switch control terminal, according to the compensation voltage. The transistor compensates and controls the driving transistor to drive the light-emitting element to emit light. The technical solutions provided by the embodiments of the present invention can ensure uniformity of display brightness, thereby improving display quality.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a control method thereof, and a display device. Background technique [0002] Organic Light Emitting Diode (OLED for short), as a current-mode light-emitting device, has the advantages of self-luminescence, fast response, wide viewing angle, and can be fabricated on a flexible substrate, and is widely used in the field of high-performance display. [0003] In related technologies, each pixel in an OLED display device is connected to a pixel driving circuit, and the pixel driving circuit includes a driving transistor to output a driving current to a light emitting element. The inventors have found that due to the limitation of the manufacturing process of the driving transistor, there are differences in the threshold voltage and mobility of different driving transistors, so that the current flowing through the light-emitting device will vary due to the di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0233G09G3/3233G09G2320/0295G09G2300/0842G09G2300/0819G09G2300/0866G09G3/3291G09G2300/043G09G2320/029
Inventor 董甜
Owner BOE TECH GRP CO LTD