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Active matrix organic light emitting diode (AMOLED) and drive circuit and method of AMOLED

A panel drive circuit and light-emitting diode technology, applied in static indicators, instruments, etc., can solve problems such as drift, poor uniformity of transistors, poor uniformity of AMOLED brightness, etc., to achieve the effect of ensuring consistency and good uniformity

Active Publication Date: 2012-09-05
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because in the existing low-temperature polysilicon process, the threshold voltage V of the transistor th The uniformity is poor, and drift will occur during use, so when the same data voltage Vdata is input to the drive tube M2, the threshold voltage of the drive tube M2 is different to generate different drive currents, resulting in poor uniformity of AMOLED brightness

Method used

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  • Active matrix organic light emitting diode (AMOLED) and drive circuit and method of AMOLED
  • Active matrix organic light emitting diode (AMOLED) and drive circuit and method of AMOLED
  • Active matrix organic light emitting diode (AMOLED) and drive circuit and method of AMOLED

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Embodiment Construction

[0027] The active matrix organic light emitting diode panel (hereinafter referred to as AMOLED) and its driving circuit and method according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] like image 3 Shown is a schematic diagram of the AMOLED driving circuit of the present invention. The AMOLED driving circuit in this embodiment includes two transistors, a capacitor, an organic light emitting diode (hereinafter referred to as OLED), a voltage regulation module and corresponding input and output terminals. Corresponding to each AMOLED drive circuit, the corresponding input and output terminals include two row scanning signal terminals (the first row scanning signal terminal S1 and the second row scanning signal terminal S2), a data signal terminal Vdata, a reference signal terminal Vref, A high-level signal terminal Vdd and a low-level signal terminal Vss. Specifically, the AMOLED drive cir...

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Abstract

The invention discloses an active matrix organic light emitting diode (AMOLED) and a drive circuit and method of the AMOLED, relating to the technical field of organic light emitting display and aiming to improve the luminance uniformity of the AMOLED. The drive circuit of the AMOLED comprises a first transistor, a second transistor, capacitors, an organic light emitting diode and a voltage regulating module, wherein the voltage regulating module is connected among a first line scanning signal terminal, a second line scanning signal terminal, a high level signal terminal and a reference signal terminal, is connected with the capacitors and the first transistor, and is used for regulating a gate-source voltage of the first transistor connected with the capacitors so as to allow a drive circuit of the first transistor in a saturated state to be unrelated with a threshold voltage of the first transistor. The AMOLED is applicable to the organic light emitting display.

Description

technical field [0001] The invention relates to the field of organic light-emitting display technology, in particular to an active matrix organic light-emitting diode panel, a driving circuit and a method thereof. Background technique [0002] AMOLED (Active Matrix Organic Light Emitting Diode) is an active matrix organic light emitting diode panel. Compared with the traditional transistor liquid crystal display panel (TFT LCD, Thin Film Transistor Liquid Crystal Display), AMOLED has the advantages of faster response speed, higher contrast ratio, and wider viewing angle, so it is called the next generation display technology. It is favored by most display technology developers. [0003] The active matrix organic light emitting diode panel is driven by a driving circuit to emit light. The traditional 2T1C drive circuit consists of two transistors (TFT) and a capacitor (C), the traditional 2T1C drive circuit such as figure 1 shown. figure 1 Among them, transistor M1 is a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3233
Inventor 青海刚祁小敬
Owner BOE TECH GRP CO LTD
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