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Pixel circuit, driving method thereof and display device

A technology of a pixel circuit and a driving method, which is applied in the field of a pixel circuit and its driving method, and a display device, can solve problems such as large size, increased driving IC manufacturing cost, and complex structure of the driving IC, so as to simplify the structure, reduce the manufacturing cost, reduce the small size effect

Active Publication Date: 2015-04-22
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex structure and large size of the digital circuit part, digital-to-analog conversion circuit, and analog circuit part in the driver IC, the overall structure of the driver IC is complicated and the size is large, thereby increasing the manufacturing cost of the driver IC.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] see figure 1 , The pixel circuit provided by the embodiment of the present invention includes a selection circuit P1, a charging and discharging circuit P2 and a pre-charging circuit P3. Among them, the input terminal of the selection circuit P1 is connected to the selection signal terminal S, the high-level signal terminal VH and the low-level signal terminal VL, and its output terminal is connected to the charging and discharging circuit P2. The signal controls the charging and discharging circuit P2 to charge or discharge the pixel capacitor C1. The input terminal of the charging and discharging circuit P2 is connected to the same row gate line signal terminal G corresponding to the pixel capacitor C1 n , the output end of which is connected to the pixel capacitor C1, and the charging and discharging circuit P2 is used to charge or discharge the pixel capacitor C1 under the control of the selection circuit P1. The input terminal of the pre-charging circuit P3 is co...

Embodiment 2

[0078] Further, see image 3 , the selection circuit P1 in the pixel circuit provided by the embodiment of the present invention includes a first transistor T1 and a second transistor T2, the charging and discharging circuit P2 includes a third transistor T3, the pre-charging circuit P3 includes a fourth transistor T4, C2 is liquid crystal, etc. Effective capacitance. The gate of the first transistor T1 is connected to the first data line D1, the source is connected to the high-level signal terminal VH, and the drain is connected to the charging and discharging circuit P2; the gate of the second transistor T2 is connected to the second data line D2, and the drain is connected to the low The level signal terminal VL, the source is connected to the charging and discharging circuit P2; the gate of the third transistor T3 is connected to the same row gate line signal terminal G corresponding to the pixel capacitance C1 n , the source is connected to the drain of the first transis...

Embodiment 3

[0096] Further, see Figure 6 The selection circuit P1 in the pixel circuit provided by the embodiment of the present invention includes a first transistor M1, a second transistor M2, and a fifth transistor M5, the charging and discharging circuit P2 includes a third transistor M3, and the precharging circuit P3 includes a fourth transistor M4, C2 is the equivalent capacitance of the liquid crystal. The gate of the first transistor M1 is connected to the selection signal terminal S, the source is connected to the pixel capacitor C1, and the drain is connected to the charging and discharging circuit P2; the gate of the second transistor M2 is connected to the selection signal terminal S, and the drain is connected to the low-level signal terminal VL , the source is connected to the pre-charging circuit P3; the gate of the fifth transistor M5 is connected to the selection signal terminal S, the source is connected to the high-level signal terminal VH, and the drain is connected ...

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Abstract

The invention discloses a pixel circuit, a driving method of the pixel circuit and a display device and relates to the technical field of display. The problem that the manufacturing cost of a driving IC is high is solved. The pixel circuit comprises a selection circuit, a charging and discharging circuit and a pre-charging circuit, wherein the input end of the selection circuit is connected with a selection signal end, a high-level signal end and a low-level signal end, and the output end of the selection circuit is connected with the charging and discharging circuit and used for controlling the charging and discharging circuit to perform charging or discharging according to a digital signal input from the selection signal end; the input end of the charging and discharging circuit is connected with a same row gate line signal end corresponding to a pixel capacitor, and the output end of the charging and discharging circuit is connected with the pixel capacitor and used for performing charging or discharging under the control of the selection circuit; the input end of the pre-charging circuit is connected with an upper-row gate line signal end corresponding to the pixel capacitor, and the output end of the pre-charging circuit is connected with the pixel capacitor and used for providing a reference voltage. The invention further provides the driving method of the pixel circuit and the display device comprising the pixel circuit. The pixel circuit is used for display.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] With the development of liquid crystal display technology, more and more electronic devices use liquid crystal displays as display screens. Liquid crystal displays include driver integrated circuits (Integrated circuit, hereinafter referred to as driver ICs) and pixel circuits. The driver ICs provide analog signals for pixel circuits. The pixel capacitance in the pixel circuit is charged by the analog signal. [0003] The driver IC includes a digital circuit part, a digital-to-analog conversion circuit and an analog circuit part, which are used to charge the pixel capacitance in the pixel circuit after converting the digital signal into an analog signal. However, since the structures of the digital circuit part, digital-to-analog conversion circuit, and analog circuit part in ...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3659G09G2300/0819G09G2300/0852G09G2310/0251G09G2310/0262
Inventor 王延峰商广良徐晓玲
Owner BOE TECH GRP CO LTD