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Bi-directional shift register and display driving circuit with bi-directional shift register

A shift register, shift register unit technology, applied in static memory, digital memory information, instruments, etc., can solve problems such as lack of flexibility

Active Publication Date: 2018-03-06
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the gate driver can only scan the scan lines line by line from top to bottom, which lacks flexibility

Method used

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  • Bi-directional shift register and display driving circuit with bi-directional shift register
  • Bi-directional shift register and display driving circuit with bi-directional shift register
  • Bi-directional shift register and display driving circuit with bi-directional shift register

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Embodiment Construction

[0052] The present invention provides a scan drive circuit that can be selectively switched between the forward scan mode and the reverse scan mode. At the same time, a pull-down module is set to control the pull-down transistor to turn on after reset, so as to avoid the shift register unit from outputting wrong signals. , improving the flexibility of the scan drive circuit.

[0053] see figure 1 , figure 1 It is a schematic diagram of an equivalent module of a display driving system 100 for driving a display device according to an embodiment of the present invention. The display driving system 100 is disposed in a non-display area 103 surrounding the display area 101 . The display area 101 includes a plurality of scan lines S 1 -S n and multiple data lines D 1 -D m . Among them, n and m are positive integers. Multiple scan lines S 1 -S n extending along the first direction X and arranged parallel to each other, a plurality of data lines D 1 -D m Extending along th...

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PUM

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Abstract

The present invention provides a bi-directional shift register that provides a scan signal to a scan line. The bi-directional shift register receives four clock signals output by a timing controller.Four clock signals are sequentially shifted according to the arrangement order. The bi-directional shift register can optionally switch between the forward scan mode and the reverse scan mode. The bi-directional shift register includes a plurality of cascade connected shift register units. Each shift register unit corresponds to one scan line and is controlled by two non-adjacent clock signals, and two clock signals are separated by one clock cycle. The shift register unit includes a pull-up transistor, a pull-down transistor, and a pull-down module. The shift register unit can be reset withinone frame of image display time. The pull-down module controls the pull-down transistor to turn on after the shift register unit resets to prevent the output error signal of the shift register unit.The present invention also provides a display driving system having a bi-directional shift register.

Description

technical field [0001] The invention relates to a bidirectional shift register and a display driving system with the bidirectional shift register. Background technique [0002] With the continuous development of electronic technology, most consumer electronic products such as mobile phones, portable computers, personal digital assistants (PDAs), tablet computers, and media players use displays as input and output devices to make the products more friendly. Way. Generally, a display includes a display panel and a display driving circuit for driving the display panel to display images. The display panel includes multiple data lines and multiple scan lines, and the driving circuit includes a timing controller, a gate driver and a data driving circuit. The gate driver outputs scan driving signals to the display panel for progressive scanning. The gate driver includes a multi-stage shift register unit. Each stage of shift register unit corresponds to one scan line. In the pr...

Claims

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Application Information

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IPC IPC(8): G09G3/20G11C19/28
CPCG09G3/20G11C19/28G09G3/3266G09G2300/0408G09G2310/0286G09G2310/08G09G3/3225G09G3/3677G09G2300/0426G09G2300/0852G09G2330/021
Inventor 林俊文翁裕复刘家麟
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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