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Method for improving brightness uniformity of AMOLED panel

A technology of brightness uniformity and panel, applied in the field of OLED display, can solve the problem of poor brightness uniformity of AMOLED panel, and achieve the effect of simple implementation, low cost and remarkable effect

Inactive Publication Date: 2012-06-27
SICHUAN CCO DISPLAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to propose a method for improving the brightness uniformity of the AMOLED panel, and to solve the problem of poor brightness uniformity of the AMOLED panel in the traditional technology

Method used

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  • Method for improving brightness uniformity of AMOLED panel
  • Method for improving brightness uniformity of AMOLED panel
  • Method for improving brightness uniformity of AMOLED panel

Examples

Experimental program
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Embodiment

[0024] Add a voltage conversion circuit in the driver IC to obtain the corresponding data signal parameters that meet the brightness requirements of the AMOLED panel, and store them in the driver chip: figure 2 As shown, a resistor R1 is added between the drive tube M2 in the pixel drive circuit and the power supply VDD, and the current size Is passing through the OLED under different gray scales is determined according to the brightness requirements of the AMOLED panel, and S is the number of gray scales; then it can be calculated in OLED When the specified brightness is reached, the voltage value Vs=Is×R1 at both ends of the resistor R1; at this time, adjust the size of the input signal Vdata of the pixel circuit so that the voltage value at both ends of the resistor R1 is Vs, and read the input signal Vdatas of the pixel circuit at this time , and store the voltage value in the drive IC as a data signal parameter meeting the brightness requirements of the AMOLED panel; when...

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Abstract

The invention relates to an OLED display technology, in particular to a method for improving the brightness uniformity of an AMOLED panel. The invention discloses the method for improving the brightness uniformity of the AMOLED panel, which solves the problem of poor brightness uniformity of the AMOLED panel in a traditional technology. The technical scheme of the invention has the following key points of: (a) adding a voltage conversion circuit in a driving chip of the AMOLED panel; (b) obtaining a corresponding data signal parameter when conforming to the brightness requirement of the AMOLED panel, and storing the corresponding data signal parameter in the driving chip; (c) inputting the input signal of a pixel point as an addressing signal to the voltage conversion circuit; and (d) invoking the data signal parameter corresponding to the pixel point and converting the data signal parameter into a driving signal by the voltage conversion circuit. The invention has the advantages of good brightness uniformity of the AMOLED panel, simple realization and low cost.

Description

technical field [0001] The invention relates to OLED display technology, in particular to a method for improving the brightness uniformity of an AMOLED panel. Background technique [0002] The traditional 2T1C (two transistors and one capacitor) pixel unit drive circuit based on N-type TFT is as follows: figure 1 shown. In the figure, the M1 tube is a switching tube, which is controlled by the row scanning line Vscan, and the purpose is to control the input of the data voltage Vdata; the M2 tube is a driving tube, which controls the OLED (organic light-emitting diode) to emit light; Cs is a storage capacitor, which is M2's The gate provides bias and sustain voltages. [0003] The working period of the driving circuit in a single scanning cycle is divided into two parts: the first part is the display data writing time t1, and the row scanning line is at high level during the display data writing time. At this time, M1 is working in the switch state, and the data signal is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G3/3233G09G3/3258
Inventor 周刚
Owner SICHUAN CCO DISPLAY TECH