Unlock instant, AI-driven research and patent intelligence for your innovation.

A driving compensation circuit, a driving compensation method, and a display device

A compensation circuit and driving unit technology, applied in static indicators, instruments, etc., can solve the problems of easy interference of driving voltage signals, lower driving voltage values, and large parasitic capacitance of display panels.

Active Publication Date: 2019-06-07
BOE TECH GRP CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the voltage-type external compensation has the advantages of faster driving speed and better compensation effect, there are still two disadvantages in the voltage-type external compensation method: on the one hand, the extracted driving voltage signal is easily disturbed, which will inevitably affect the Compensation has a certain impact; on the other hand, with the increase in the size and resolution of AMOLED displays, the parasitic capacitance of the display panel is also increasing, which leads to a decrease in the value of the driving voltage within a fixed period of time. When performing analog-to-digital conversion on low-value driving voltages, higher requirements are placed on the accuracy of the analog-to-digital converter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A driving compensation circuit, a driving compensation method, and a display device
  • A driving compensation circuit, a driving compensation method, and a display device
  • A driving compensation circuit, a driving compensation method, and a display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] like figure 1As shown, this embodiment provides a driving compensation circuit for driving the display unit 4 . The drive compensation circuit specifically includes a drive unit 1 , a current amplification unit 2 , and a processing modulation unit 3 .

[0049] Wherein, the control terminal of the driving unit 1 is connected with the scan signal terminal SCAN, the first input terminal of the driving unit 1 is connected with the data line DATA, the second input terminal of the driving unit 1 is connected with the first power signal terminal OVDD, and the driving unit 1 The output terminals are respectively connected to the display unit 4 and the first input terminal of the current amplifying unit 2, the second input terminal of the current amplifying unit 2 is connected to the second power supply signal terminal AVDD, and the control terminal of the current amplifying unit 2 is connected to the control signal terminal SW , the first output terminal of the current amplifi...

Embodiment 2

[0079] This embodiment provides a driving compensation method, which is applied to the driving compensation circuit described in the first embodiment.

[0080] like Figure 4 As shown, the driving compensation method provided in this embodiment specifically includes:

[0081] Step S1: under the action of the scan signal provided by the scan signal terminal, convert the voltage signal provided by the data line into a current signal.

[0082] Step S2: Under the action of the control signal provided by the control signal terminal, the converted current signal is collected and the current signal is amplified.

[0083] Step S3: converting the amplified current signal into a driving voltage signal, processing and modulating the driving voltage signal, and transmitting the modulated driving voltage signal to the data line.

[0084] Step S4: Convert the modulated driving voltage signal provided by the data line into a driving current signal under the action of the scanning signal pr...

Embodiment 3

[0096] This embodiment provides a display device, which includes the driving compensation circuit and a display unit as described in the first embodiment.

[0097] In the display device provided by this embodiment, the signal output to the display unit can be compensated, so as to eliminate the mura phenomenon and afterimage phenomenon, and the display unit can be, for example, an organic light emitting diode. Moreover, since the signal collected during compensation is a current signal, it can also avoid adverse effects caused by collecting the driving voltage signal for compensation in the prior art, which is conducive to the development of large size and high resolution.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a drive compensation circuit and drive compensation method and a display device, relates to a field of display technology and can overcome negative influence brought by a method implementing compensation through collecting drive voltage in the prior art. The drive compensation circuit includes a drive unit, a current amplification unit and a processing modulation unit. A control terminal of the drive unit is connected with a scanning signal terminal. A first input terminal of the drive unit is connected with a data line. An output terminal of the drive unit is connected with the first input terminal of a current amplification unit and the display unit. A control terminal of the drive unit is connected with a control signal terminal. A first output terminal of the drive unit is connected with the input terminal processing modulation terminal. The output terminal of the processing modulation unit is connected with the data line. The drive unit converts voltage signals provided by the data line to current signals and outputs the current signals to the display unit. The current amplification unit collects amplification current signals. The processing modulation unit converts the current signals to drive voltage signals for processing modulation and transmits modulated signals to the data line. The above drive compensation circuit is used for image display.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a driving compensation circuit, a driving compensation method, and a display device. Background technique [0002] AMOLED (Active Matrix / Organic Light Emitting Diode, active matrix organic light emitting diode panel) display has the advantages of ultra-thin, high color gamut, high contrast, etc., and has been widely used in the display field. [0003] When manufacturing thin film transistors in a large area to form a pixel drive circuit for an AMOLED display, on the one hand, due to process limitations, the values ​​of electrical parameters such as threshold voltage and electron mobility of thin film transistors at different positions cannot be kept consistent, which will cause The current difference and brightness difference of organic light-emitting diodes, that is, the mura phenomenon occurs. In addition, under long-term pressure and high temperature, the threshold voltage o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 王糖祥宋琛
Owner BOE TECH GRP CO LTD