CN107507827A - 显示面板的静电保护电路及显示面板 - Google Patents

显示面板的静电保护电路及显示面板 Download PDF

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CN107507827A
CN107507827A CN201710780276.XA CN201710780276A CN107507827A CN 107507827 A CN107507827 A CN 107507827A CN 201710780276 A CN201710780276 A CN 201710780276A CN 107507827 A CN107507827 A CN 107507827A
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electrostatic
type tft
display panel
output line
protective circuit
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徐品全
刘元甫
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN201710780276.XA priority Critical patent/CN107507827A/zh
Priority to PCT/CN2017/114004 priority patent/WO2019041605A1/zh
Priority to US15/579,469 priority patent/US10601221B2/en
Publication of CN107507827A publication Critical patent/CN107507827A/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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
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    • 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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    • 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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    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/0203—Particular design considerations for integrated circuits
    • H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
    • H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
    • H01L27/0266—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using field effect transistors as protective elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/0203—Particular design considerations for integrated circuits
    • H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
    • H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
    • H01L27/0296—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices involving a specific disposition of the protective devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
    • H02H9/046—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere responsive to excess voltage appearing at terminals of integrated circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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    • 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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Abstract

本发明提供了一种显示面板的静电保护电路，其包括：第一P型薄膜晶体管，其栅极连接至高电位静电输出线，且其漏极连接至高电位静电输出线；第二P型薄膜晶体管，其栅极连接至高电位静电输出线，且其漏极连接至第一P型薄膜晶体管的源极，且其源极连接至静电信号输入线；第一N型薄膜晶体管，其栅极连接至低电位静电输出线，且其漏极连接至低电位静电输出线；第二N型薄膜晶体管，其栅极连接至低电位静电输出线，且其漏极连接至第一N型薄膜晶体管的源极，且其源极连接至静电信号输入线。本发明还提供了一种具有该静电保护电路的显示面板。本发明将输出针上的静电转移至静电保护电路，以保护输出针，从而提高显示面板的抗静电能力。

Description

显示面板的静电保护电路及显示面板
技术领域
本发明属于显示技术领域，具体地讲，涉及一种显示面板的静电保护电路及显示面板。
背景技术
目前，液晶显示面板上电路的静电放电(Electro-Static Discharge，ESD)现象比较严重，电路受到ESD损伤的情形已经非常普遍。
在液晶显示面板的芯片(IC)绑定(Bonding)区，外接数字信号需输入到输入针(Input Pin)，再经由芯片输入至输出针(Output Pin)而进入液晶显示面板的显示区内。在这个过程中，静电会由输入针无规则跳跃至输出针，从而易炸伤输出针，导致良率下降。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种能够将输出针的静电进行转移的显示面板的静电保护电路及显示面板。
根据本发明的一方面，提供了一种显示面板的静电保护电路，所述静电保护电路包括：高电位静电输出线、低电位静电输出线、第一P型薄膜晶体管、第二P型薄膜晶体管、第一N型薄膜晶体管、第二N型薄膜晶体管以及静电信号输入线；所述第一P型薄膜晶体管的栅极连接至所述高电位静电输出线，且其漏极连接至所述高电位静电输出线；所述第二P型薄膜晶体管的栅极连接至所述高电位静电输出线，且其漏极连接至所述第一P型薄膜晶体管的源极，且其源极连接至所述静电信号输入线；所述第一N型薄膜晶体管的栅极连接至所述低电位静电输出线，且其漏极连接至所述低电位静电输出线；所述第二N型薄膜晶体管的栅极连接至所述低电位静电输出线，且其漏极连接至所述第一N型薄膜晶体管的源极，且其源极连接至所述静电信号输入线。
进一步地，当所述显示面板没有发生静电放电现象时，所述静电信号输入线的电位介于所述高电位静电输出线与所述低电位静电输出线的电位之间，所述第一P型薄膜晶体管、所述第二P型薄膜晶体管、所述第一N型薄膜晶体管以及所述第二N型薄膜晶体管均截止。
进一步地，当所述显示面板发生静电放电现象，且所述静电信号输入线的电位高于所述高电位静电输出线的电位时，所述第一P型薄膜晶体管和所述第二P型薄膜晶体管导通，所述第一N型薄膜晶体管和所述第二N型薄膜晶体管截止。
进一步地，当所述显示面板发生静电放电现象，且所述静电信号输入线的电位低于所述低电位静电输出线的电位时，所述第一P型薄膜晶体管和所述第二P型薄膜晶体管截止，所述第一N型薄膜晶体管和所述第二N型薄膜晶体管导通。
进一步地，所述高电位静电输出线的电位与所述显示面板的像素的薄膜晶体管的栅极导通电压的电位相同，所述低电位静电输出线的电位与所述显示面板的像素的薄膜晶体管的栅极截止电压的电位相同。
根据本发明的另一方面，还提供了一种显示面板，其包括上述的静电保护电路。
进一步地，所述显示面板为液晶显示面板或者有机发光二极管显示面板。
本发明的有益效果：本发明将输出针上的静电转移至静电保护电路，这样可以避免静电炸伤输出针，从而保护输出针，进而提高显示面板的抗静电能力。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是根据本发明的实施例的显示面板的结构示意图；
图2是根据本发明的实施例的静电保护电路的电路结构图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
在附图中，为了清楚起见，夸大了层和区域的厚度。相同的标号在说明书和附图中始终用于表示相同或相近的元件。
图1是根据本发明的实施例的显示面板的结构示意图。
参照图1，根据本发明的实施例的显示面板包括：显示区10A以及位于显示区10A一侧的绑定区10B。显示区10A内通常具有阵列排布的多个像素(未示出)，每个像素包括至少一个薄膜晶体管(未示出)。绑定区10B内具有输入针20A以及与输入针20A相对的输出针20B，输入针20A接入外接数字信号，该外接数字信号经由芯片输入至输出针(Output Pin)而进入,显示面板的显示区10A内，从而提供给各个像素。此外，在本实施例中，显示面板可例如是液晶显示面板或者有机发光二极管显示面板，但本发明并不限制于此。
进一步地，绑定区10B内还具有静电保护电路30。每个输出针20B可以连接至对应的一个静电保护电路30，或者所有的输出针20B都连接至同一个静电保护电路30，这样，当输出针20B受到静电放电时可由其连接的静电保护电路30将静电转移，从而保护输出针20B。在本实施例中，每个输出针20B连接一个静电保护电路，但本发明并不限制于此。
以下对根据本发明的实施例的静电保护电路30进行详细说明。以三个输出针20B以及三个静电保护电路30为例进行说明。
图2是根据本发明的实施例的静电保护电路的电路结构图。
参照图2，根据本发明的实施例的静电保护电路30包括：高电位静电输出线HL、低电位静电输出线LL、第一P型薄膜晶体管PT1、第二P型薄膜晶体管PT2、第一N型薄膜晶体管NT1、第二N型薄膜晶体管NT2以及静电信号输入线IL。
高电位静电输出线HL的电位高于低电位静电输出线LL的电位。作为本发明的一实施方式，高电位静电输出线HL的电位与显示区10A内的像素的薄膜晶体管的栅极导通电压(VGH)的电位相同，而低电位静电输出线LL的电位与显示区10A内的像素的薄膜晶体管的栅极截止电压(VGL)的电位相同。
第一P型薄膜晶体管PT1的栅极连接至高电位静电输出线HL，且其漏极连接至高电位静电输出线HL，且其源极连接至第二P型薄膜晶体管PT2的漏极。
第二P型薄膜晶体管PT2的栅极连接至高电位静电输出线HL，且其漏极连接至第一P型薄膜晶体管PT1的源极，且其源极连接至静电信号输入线IL。
第一N型薄膜晶体管NT1的栅极连接至低电位静电输出线LL，且其漏极连接至低电位静电输出线LL，且其源极连接至第二N型薄膜晶体管NT2的漏极。
第二N型薄膜晶体管NT2的栅极连接至低电位静电输出线LL，且其漏极连接至第一N型薄膜晶体管NT1的源极，且其源极连接至静电信号输入线IL。
根据本发明的实施例的静电保护电路30的具体原理为：
当显示面板没有发生静电放电现象时，静电信号输入线IL的电位介于高电位静电输出线HL与低电位静电输出线LL的电位之间，此时第一P型薄膜晶体管PT1、第二P型薄膜晶体管PT2、第一N型薄膜晶体管NT1、第二N型薄膜晶体管NT2均截止。
当显示面板发生静电放电现象，且静电信号输入线IL的电位高于高电位静电输出线HL的电位时，第一P型薄膜晶体管PT1和第二P型薄膜晶体管PT2导通，第一N型薄膜晶体管NT1和第二N型薄膜晶体管NT2截止，静电由输出针20B转移至高电位静电输出线HL，从而保护输出针20B。
当显示面板发生静电放电现象，且静电信号输入线IL的电位低于低电位静电输出线LL的电位时，第一P型薄膜晶体管PT1和第二P型薄膜晶体管PT2截止，第一N型薄膜晶体管NT1和第二N型薄膜晶体管NT2导通，静电由输出针20B转移至低电位静电输出线LL，从而保护输出针20B。
综上所述，根据本发明的实施例，将输出针上的静电转移至静电保护电路，这样可以避免静电炸伤输出针，从而保护输出针，进而提高显示面板的抗静电能力。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (7)

1.一种显示面板的静电保护电路，其特征在于，所述静电保护电路包括：高电位静电输出线、低电位静电输出线、第一P型薄膜晶体管、第二P型薄膜晶体管、第一N型薄膜晶体管、第二N型薄膜晶体管以及静电信号输入线；
所述第一P型薄膜晶体管的栅极连接至所述高电位静电输出线，且其漏极连接至所述高电位静电输出线；
所述第二P型薄膜晶体管的栅极连接至所述高电位静电输出线，且其漏极连接至所述第一P型薄膜晶体管的源极，且其源极连接至所述静电信号输入线；
所述第一N型薄膜晶体管的栅极连接至所述低电位静电输出线，且其漏极连接至所述低电位静电输出线；
所述第二N型薄膜晶体管的栅极连接至所述低电位静电输出线，且其漏极连接至所述第一N型薄膜晶体管的源极，且其源极连接至所述静电信号输入线。
2.根据权利要求1所述的静电保护电路，其特征在于，当所述显示面板没有发生静电放电现象时，所述静电信号输入线的电位介于所述高电位静电输出线与所述低电位静电输出线的电位之间，所述第一P型薄膜晶体管、所述第二P型薄膜晶体管、所述第一N型薄膜晶体管以及所述第二N型薄膜晶体管均截止。
3.根据权利要求1所述的静电保护电路，其特征在于，当所述显示面板发生静电放电现象，且所述静电信号输入线的电位高于所述高电位静电输出线的电位时，所述第一P型薄膜晶体管和所述第二P型薄膜晶体管导通，所述第一N型薄膜晶体管和所述第二N型薄膜晶体管截止。
4.根据权利要求1所述的静电保护电路，其特征在于，当所述显示面板发生静电放电现象，且所述静电信号输入线的电位低于所述低电位静电输出线的电位时，所述第一P型薄膜晶体管和所述第二P型薄膜晶体管截止，所述第一N型薄膜晶体管和所述第二N型薄膜晶体管导通。
5.根据权利要求1至4任一项所述的静电保护电路，其特征在于，所述高电位静电输出线的电位与所述显示面板的像素的薄膜晶体管的栅极导通电压的电位相同，所述低电位静电输出线的电位与所述显示面板的像素的薄膜晶体管的栅极截止电压的电位相同。
6.一种显示面板，其特征在于，包括权利要求1至5任一项所述的静电保护电路。
7.根据权利要求6所述的显示面板，其特征在于，所述显示面板为液晶显示面板或者有机发光二极管显示面板。
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