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Pixel circuit for silicon-based AMOLED driving chip

A technology of pixel circuit and driving chip, applied in the direction of instruments, static indicators, etc., can solve the problem of poor display effect of pixel driving circuit, and achieve the effect of improving display effect, improving GAMMA change and simple structure

Active Publication Date: 2019-08-20
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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  • Pixel circuit for silicon-based AMOLED driving chip
  • Pixel circuit for silicon-based AMOLED driving chip
  • Pixel circuit for silicon-based AMOLED driving 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

The invention discloses a pixel circuit for a silicon-based AMOLED driving chip. The driving circuit is characterized by comprising a driving tube MN2, a switching tube MN1, a switching tube MP2 and astorage capacitor C2. The switch tube MP2 is a P-type MOS tube. The driving tube MN2 and the switching tube MN1 are both N-type MOS tubes. The drain electrode of the switch tube MP2 is connected withthe positive end of an input voltage source Vdata. The source electrode of the switch tube MP2, the grid electrode of the driving tube MN2 and the drain electrode of the switch tube MN1 are all connected with one end of the capacitor C2, the source electrode of the switch tube MN1 is connected with the ground GND, and the grid electrode of the switch tube MN1 is connected with an external controlsignal SEL1. The grid electrode of the switch tube MP2 is connected with a row selection control signal SEL2. The negative end of the voltage source Vdata and the other end of the capacitor C2 are connected with the ground GND. The drain electrode of the driving tube MN2 is connected with the voltage VDD, the source electrode of the driving tube MN2 is connected with the anode of the OLED, and the cathode of the OLED is connected with the Vcom voltage. Brightness adjustment is achieved through the switch tube, the structure is simple, the area can be saved, and the adjustable range is large.

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 Applications(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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