CN106970478A - 一种用于lcm电测时残留电荷释放电路 - Google Patents

一种用于lcm电测时残留电荷释放电路 Download PDF

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Publication number
CN106970478A
CN106970478A CN201710225819.1A CN201710225819A CN106970478A CN 106970478 A CN106970478 A CN 106970478A CN 201710225819 A CN201710225819 A CN 201710225819A CN 106970478 A CN106970478 A CN 106970478A
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Prior art keywords
mos
lcm
panel
connection
mcui
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CN201710225819.1A
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陈良忠
欧阳生运
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Shenzhen Dili Photoelectric Technology Co Ltd
Shenzhen DJN Optronics Technology Co Ltd
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Shenzhen Dili Photoelectric Technology Co Ltd
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Priority to CN201710225819.1A priority Critical patent/CN106970478A/zh
Publication of CN106970478A publication Critical patent/CN106970478A/zh
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

本发明公开了一种用于LCM电测时残留电荷释放电路，其特征在于，包括连接外部一个MCUI/O接口，一个RC回路，一个P‑MOS和两个N‑MOS；所述的MCUI/O接口连接Panel_EN并为Panel_EN提供高低电平，Panel_EN并联一个P‑MOS和一个N‑MOS，一个N‑MOS电连接另外一个N‑MOS，最后P‑MOS和N‑MOS通过RC电路连接LCD‑POWER；所述5V电源连接连接LCD‑POWER。本发明电路简单、廉价、高效、实用、稳定，可通过调整RC值，实现对不同LCM放电时间的要求，可提高产线生产良率，避免因测试电荷残留而导致客户屏闪、液晶极化等问题，影响用户体验。

Description

一种用于LCM电测时残留电荷释放电路
技术领域
本发明属于LCM电测领域，具体地说，涉及一种用于LCM电测时残留电荷释放电路。
背景技术
目前随着液晶行业发展，液晶显示器解析度越来越高，液晶显示器RCLoading越来越大，导致液晶显示器测试时，会产生一定的残留电荷，从而影响到显示效果。如何释放液晶显示器测试时残留的电荷，是国内各个模组厂急于解决的问题，一般的模组厂的做法是，遇到液晶显示模组测试残留电荷时，会在静置一段时间直到残留电荷释放完，这样严重影响了生产效率，且生产品质不可控。本发明有效解决了这个问题，大大的提高生产效率和品质问题。
发明内容
本发明要解决的技术问题是克服上述缺陷，提供了一种用于LCM电测时残留电荷释放电路，实现了避免工厂测试因电荷残留而引起的屏闪问题。
为解决上述问题，本发明所采用的技术方案是：
一种用于LCM电测时残留电荷释放电路，其特征在于，包括连接外部一个MCUI/O接口，一个RC回路，一个P-MOS和两个N-MOS；所述的MCUI/O接口连接Panel_EN并为Panel_EN提供高低电平，Panel_EN并联一个P-MOS和一个N-MOS，一个N-MOS电连接另外一个N-MOS，最后P-MOS和N-MOS通过RC电路连接LCD-POWER；所述5V电源连接连接LCD-POWER；所述RC回路为释放LCM测试时残留电荷功能；所述MCUI/O接口用于控制MOS管导通或截止；所述MOS管控制LCM电源供电和释放回路。
由于采用了上述技术方案，与现有技术相比，本发明电路简单、廉价、高效、实用、稳定，可通过调整RC值，实现对不同LCM放电时间的要求，可提高产线生产良率，显著提升因测试非法断电导致LCM残留电荷，避免因测试电荷残留而导致客户屏闪、液晶极化等问题，影响用户体验。
附图说明
图1为本发明实施例中的电路原理图。
具体实施方式
实施例：
如图1所述，一种用于LCM电测时残留电荷释放电路，包括连接外部一个MCUI/O接口，一个RC回路，一个P-MOS和两个N-MOS；所述的MCUI/O接口连接Panel_EN并为Panel_EN提供高低电平，Panel_EN并联一个P-MOS和一个N-MOS，一个N-MOS电连接另外一个N-MOS，最后P-MOS和N-MOS通过RC电路连接LCD-POWER；所述5V电源连接连接LCD-POWER；所述RC回路为释放LCM测试时残留电荷功能；所述MCUI/O接口用于控制MOS管导通或截止；所述MOS管控制LCM电源供电和释放回路。
具体的操作是：
MCUI/O口为Panel_EN提供高电平时，Q2的MOS管导通，Q3的MOS管截止，Q1的MOS管导通，5V电源与LCD-POWER导通，从而给LCD供电。
MCUI/O口为Panel_EN提供低电平时，Q2的MOS管截止，Q3的MOS管导通，Q1的MOS管截止，5V电源与LCD_POWER不导通，从而LCD在不上电状态，LCD残留电荷可通过RC回路释放掉。
本发明电路简单、廉价、高效、实用、稳定，可通过调整RC值，实现对不同LCM放电时间的要求，可提高产线生产良率，避免因测试电荷残留而导致客户屏闪、液晶极化等问题，影响用户体验。
本发明不局限于上述的优选实施方式，任何人应该得知在本发明的启示下做出的结构变化，凡是与本发明具有相同或者相近似的技术方案，均属于本发明的保护范围。

Claims (1)

1.一种用于LCM电测时残留电荷释放电路，其特征在于，包括连接外部一个MCUI/O接口，一个RC回路，一个P-MOS和两个N-MOS；所述的MCUI/O接口连接Panel_EN并为Panel_EN提供高低电平，Panel_EN并联一个P-MOS和一个N-MOS，一个N-MOS电连接另外一个N-MOS，最后P-MOS和N-MOS通过RC电路连接LCD-POWER；所述5V电源连接连接LCD-POWER；所述RC回路为释放LCM测试时残留电荷功能；所述MCUI/O接口用于控制MOS管导通或截止；所述MOS管控制LCM电源供电和释放回路。
CN201710225819.1A 2017-04-07 2017-04-07 一种用于lcm电测时残留电荷释放电路 Pending CN106970478A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112582015A (zh) * 2020-12-30 2021-03-30 普冉半导体(上海)股份有限公司 一种用于NOR Flash可靠性测试的方法及系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103425235A (zh) * 2013-08-13 2013-12-04 佛山市顺德万和电气配件有限公司 单片机低功耗待机电路及控制方法
CN205810337U (zh) * 2016-05-17 2016-12-14 深圳前海骁客影像科技设计有限公司 一种用于液晶屏正负电源下电过程中快速放电的电路

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103425235A (zh) * 2013-08-13 2013-12-04 佛山市顺德万和电气配件有限公司 单片机低功耗待机电路及控制方法
CN205810337U (zh) * 2016-05-17 2016-12-14 深圳前海骁客影像科技设计有限公司 一种用于液晶屏正负电源下电过程中快速放电的电路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112582015A (zh) * 2020-12-30 2021-03-30 普冉半导体(上海)股份有限公司 一种用于NOR Flash可靠性测试的方法及系统

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