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Shift register and grid drive circuit

A shift register, source technology, applied in static memory, digital memory information, instruments, etc., can solve the problems of complicated circuit design and unfavorable development of narrow edge of display panel.

Active Publication Date: 2014-11-19
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the gate drive circuit and the light-emitting drive circuit that provide the scanning signal and the light-emitting signal to each pixel circuit are independently arranged in the non-display area (frame area) of the display panel, and the design of such a circuit is relatively complicated. , is not conducive to the development of narrow-edge display panels

Method used

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  • Shift register and grid drive circuit
  • Shift register and grid drive circuit
  • Shift register and grid drive circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] Example 1: Combining Figure 8a shown in the shift register as well as Figure 8b shown Figure 8a The input and output timing diagrams of the present invention describe the working process of the shift register provided by the embodiment of the present invention. Specifically, choose the Figure 8b There are four stages A to D in the input and output sequence diagram shown. In the following description, 1 represents a high-level signal, and 0 represents a low-level signal.

[0119]In phase A, Input=0, CLKB=0, CLK=1, Reset=1, Ref1=1. Because Reset=1, the ninth switch transistor T9 is turned off; because Input=0, the eighth switch transistor T8 is turned on, and Ref1 is turned on with the second node P2, so that the second node P2 is at a high level, thereby making the tenth switch transistor T8 turn on. The switch transistor T10 and the sixth switch transistor T6 are turned off, and the turned off sixth switch transistor T6 makes the first switch transistor T1 turn...

Embodiment 2

[0124] Embodiment 2: Combination Figure 9a shown in the shift register as well as Figure 9b shown Figure 9a The input and output timing diagrams of the present invention describe the working process of the shift register provided by the embodiment of the present invention. Specifically, choose the Figure 9b There are four stages A to D in the input and output sequence diagram shown. In the following description, 1 represents a high-level signal, and 0 represents a low-level signal.

[0125] In phase A, Input=1, CLKB=1, CLK=0, Reset=0, Ref1=0. Because Reset=0, the ninth switching transistor T9 is turned off; because Input=1, the eighth switching transistor T8 is turned on, and Ref1 is turned on with the second node P2, so that the second node P2 is at a low level, thereby making the tenth The switch transistor T10 and the sixth switch transistor T6 are turned off, and the closed sixth switch transistor T6 turns off the first switch transistor T1; at the same time, sinc...

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Abstract

The invention discloses a shift register and a grid drive circuit. The shift register comprises a signal input unit, a reset control unit, a glowing signal output control unit and a scanning signal output control unit; in a charging stage, the signal input unit controls the glowing signal output control unit to conduct a first reference signal terminal and a glowing signal output terminal, and controls the scanning signal output control unit to conduct a second clock signal terminal and a scanning signal output terminal; in a scanning signal output stage, the scanning signal output terminal outputs a scanning signal; in a glowing signal output stage, the glowing signal output terminal outputs a glowing signal. The shift register provided by the embodiment of the invention integrates the functions of outputting the scanning signal and the glowing signal, so that a glowing drive circuit, which is arranged on the frame of an OLED display panel and is used for providing glowing signals for all pixel circuits, is eliminated; the shift register is conducive to narrow frame design of the display panel.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a shift register and a gate drive circuit. Background technique [0002] Organic Light Emitting Diode (OLED) is one of the hot spots in the field of flat panel display research today. Compared with liquid crystal displays, OLED has the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. , OLEDs have begun to replace traditional LCD displays in display fields such as mobile phones, PDAs, and digital cameras. Unlike LCD, which uses a stable voltage to control brightness, OLED is current-driven and requires a stable current to control light emission. Due to reasons such as process technology and device aging, the threshold voltage V of the driving transistor driving the OLED will be th There is inhomogeneity, which causes the current flowing through each pixel OLED to change, resulting in uneven display brightn...

Claims

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Application Information

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IPC IPC(8): G09G3/32G11C19/28G09G3/3233
CPCG09G3/3266G09G3/3233G09G2300/0819G09G2300/0842G09G2300/0861G09G2310/0262G09G2310/0278G09G2310/0286
Inventor 韦东梅青海刚邓银
Owner BOE TECH GRP CO LTD
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