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A pixel circuit for a silicon-based amoled driver chip

A technology for driving chips and pixel circuits, applied in static indicators, instruments, etc., can solve problems such as poor display effect of pixel drive circuits, achieve the effects of improving display effect, stabilizing GAMMA characteristics, and saving area

Active Publication Date: 2021-06-04
NANJING GUOZHAO OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to design a pixel circuit for a silicon-based AMOLED driver chip for the problem of poor display effect in the existing pixel driver circuit, so as to improve the GAMMA change caused by the brightness change of AMOLED light emission.

Method used

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  • A pixel circuit for a silicon-based amoled driver chip
  • A pixel circuit for a silicon-based amoled driver chip
  • A pixel circuit for a silicon-based amoled driver chip

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as Figure 3-4 shown.

[0022] A pixel circuit for a silicon-based AMOLED driver chip, see image 3 , which is composed of the specific pixel circuit 2 inside the dotted line frame, an external voltage source Vdata, and an external OLED. The drain of the P-type MOS transistor MP2 is connected to the positive terminal of the input voltage source Vdata, the source of the P-type MOS transistor MP2, the gate of the N-type MOS transistor MN2, and the drain of the N-type MOS transistor MN1 are all connected to one end of the capacitor C2 connected. The source of the N-type MOS transistor MN1 is connected to the ground GND, and the gate of the N-type MOS transistor MN1 is connected to the external control signal SEL1. The gate of the P-type MOS transistor MP2 is connected to the row selection control signal SEL2. The negative end of...

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Abstract

A pixel circuit for a silicon-based AMOLED drive chip, characterized in that it includes a drive tube MN2, a switch tube MN1, a switch tube MP2, a storage capacitor C2, the switch tube MP2 is a P-type MOS tube, the drive tube MN2 and the switch tube MN1 Both are N-type MOS tubes, the drain of the switch tube MP2 is connected to the positive end of the input voltage source Vdata, the source of the switch tube MP2, the gate of the drive tube MN2, and the drain of the switch tube MN1 are connected to one end of the capacitor C2 , the source of the switch tube MN1 is connected to the ground GND, the gate of the switch tube MN1 is connected to the external control signal SEL1; the gate of the switch tube MP2 is connected to the row selection control signal SEL2; the negative end of the voltage source Vdata, the other end of the capacitor C2 One end is connected to the ground GND; the drain of the driving transistor MN2 is connected to the voltage VDD, the source of the driving transistor MN2 is connected to the anode of the OLED, and the cathode of the OLED is connected to the Vcom voltage. The invention adopts a switch tube to realize brightness adjustment, has a simple structure, can save area, and has a large adjustable range.

Description

technical field [0001] The invention relates to a microelectronics and display technology, in particular to a pixel circuit, in particular to a pixel circuit for a silicon-based AMOLED drive chip. Background technique [0002] As we all know, silicon-based active organic light-emitting diode (AMOLED) microdisplay is a branch of display technology, which realizes the combination of OLED technology and silicon-based integrated circuit technology. Silicon-based AMOLED microdisplay has the characteristics of thinness and lightness, active light emission, wide viewing angle, no flicker and jitter, low-voltage drive, high luminous efficiency, fast response speed, low power consumption, and high integration. It can be used in various display fields. Because of its small size, it has great advantages in portable display applications. At present, it is mainly used in helmet-mounted displays, glasses-type displays, etc., and can also be used in other mobile terminal displays, involvi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 秦昌兵张白雪陈启宏杨建兵
Owner NANJING GUOZHAO OPTOELECTRONICS TECH CO LTD
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