[go: up one dir, main page]

CN107728352B - 一种像素驱动电路及液晶显示面板 - Google Patents

一种像素驱动电路及液晶显示面板 Download PDF

Info

Publication number
CN107728352B
CN107728352B CN201711172056.5A CN201711172056A CN107728352B CN 107728352 B CN107728352 B CN 107728352B CN 201711172056 A CN201711172056 A CN 201711172056A CN 107728352 B CN107728352 B CN 107728352B
Authority
CN
China
Prior art keywords
source
electrode
thin film
film transistor
pixel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201711172056.5A
Other languages
English (en)
Other versions
CN107728352A (zh
Inventor
徐洪远
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to CN201711172056.5A priority Critical patent/CN107728352B/zh
Priority to EP17933031.1A priority patent/EP3715939A4/en
Priority to JP2020524746A priority patent/JP6994571B2/ja
Priority to KR1020207016627A priority patent/KR102262884B1/ko
Priority to PCT/CN2017/113336 priority patent/WO2019100416A1/zh
Publication of CN107728352A publication Critical patent/CN107728352A/zh
Application granted granted Critical
Publication of CN107728352B publication Critical patent/CN107728352B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • G02F1/13624Active matrix addressed cells having more than one switching element per pixel
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306Circuit arrangements or driving methods for the control of single liquid crystal cells
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1343Electrodes
    • G02F1/134309Electrodes characterised by their geometrical arrangement
    • G02F1/134345Subdivided pixels, e.g. for grey scale or redundancy
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • G02F1/136213Storage capacitors associated with the pixel electrode
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • G02F1/136286Wiring, e.g. gate line, drain line
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3685Details of drivers for data electrodes
    • G09G3/3688Details of drivers for data electrodes suitable for active matrices only
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3696Generation of voltages supplied to electrode drivers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10DINORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D30/00Field-effect transistors [FET]
    • H10D30/60Insulated-gate field-effect transistors [IGFET]
    • H10D30/67Thin-film transistors [TFT]
    • H10D30/6729Thin-film transistors [TFT] characterised by the electrodes
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10DINORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H10D86/441Interconnections, e.g. scanning lines
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10DINORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H10D86/60Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F2201/00Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/40Arrangements for improving the aperture ratio
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0421Structural details of the set of electrodes
    • G09G2300/0426Layout of electrodes and connections
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0439Pixel structures
    • G09G2300/0443Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809Several active elements per pixel in active matrix panels
    • G09G2300/0842Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0852Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0242Compensation of deficiencies in the appearance of colours

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Power Engineering (AREA)
  • Geometry (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

本发明的像素驱动电路及液晶显示面板,将第二开关管的第一端、第二端、第三端分别与数据线、公共电极线、第二像素电极连接,通过控制第二开关管的第一端、第二端、第三端的导通,使得第二像素电极上的电压处于数据线提供的数据电压和公共电极线提供的公共电压之间,进而使得第一像素电极和第二像素电极之间形成预定电压差,在解决色偏问题的同时,能获得较高的开口率,并且不会增加额外的寄生电容,进而提高显示效果。

Description

一种像素驱动电路及液晶显示面板
技术领域
本发明涉及液晶显示领域,具体涉及一种像素驱动电路及液晶显示面板。
背景技术
液晶显示面板通常由彩色滤光片基板、薄膜晶体管阵列基板以及配置于两极板之间的液晶层构成,并分别在两基板的相对内侧设置像素电极、公共电极,通过施加电压控制液晶分子改变方向,将背光模组的光线折射出来产生画面。其中,VA(Vertical Alignment,垂直配向)型液晶显示面板具有高对比度、宽视野角、无须摩擦配向等优点而被广泛应用,但由于VA型液晶显示面板采用垂直转动的液晶,液晶分子双折射率的差异比较大,导致大视角下色偏问题比较严重。
为改善VA型液晶显示面板的色偏问题,通常采用电容耦合技术、电荷分享技术、公共电极电压调制技术和3T技术等等。其中,3T技术是目前低色偏电路架构中最有优势的一种,其通过3个薄膜晶体管使得同一个子像素单元内的不同区域的液晶分子转动角度不一样,从而改善色偏。然而3T技术中采用较多的薄膜晶体管,其开口率较大;另外,较多的薄膜晶体管会增加额外的寄生电容,影响显示效果。
故,有必要提供一种像素驱动电路及液晶显示面板,以解决现有技术存在的问题。
发明内容
本发明的目的在于提供一种像素驱动电路及液晶显示面板,在解决色偏问题的同时,能获得较高的开口率,并且不会增加额外的寄生电容,进而提高显示效果。
为实现上述目的,本发明提供一种像素驱动电路,其包括:多条扫描线和多条数据线交叉限定的多个子像素单元,每个所述子像素单元均连接一扫描线以及一数据线,每个所述子像素单元均包括第一开关管、第二开关管、第一像素电极以及第二像素电极;其中,
所述第一开关管具有控制端、第一端及第二端,所述第一开关管的控制端与所述扫描线连接,所述第一开关管的第一端与所述数据线连接,所述第一开关管的第二端与所述第一像素电极连接,用于在所述扫描线提供的扫描信号的控制下,导通所述第一开关管的第一端和第二端;
所述第二开关管具有控制端、第一端、第二端及第三端,所述第二开关管的控制端与所述扫描线连接,所述第二开关管的第一端与所述数据线连接,所述第二开关管的第二端与公共电极线连接,所述第二开关管的第三端与所述第二像素电极连接,用于在所述扫描线提供的扫描信号的控制下,导通所述第二开关管的第一端、第二端和第三端,以使所述第一像素电极和所述第二像素电极之间形成预定电压差。
在本发明的像素驱动电路中,所述第一开关管为薄膜晶体管,所述第一开关管的控制端、第一端、第二端分别为所述薄膜晶体管的栅极、源极、漏极;
所述第二开关管为双源极薄膜晶体管,所述第二开关管的控制端、第一端、第二端、第三端分别为所述双源极薄膜晶体管的栅极、第一源极、第二源极、漏极。
在本发明的像素驱动电路中,其特征在于,所述双源极薄膜晶体管的第一源极、第二源极、漏极处于同一层,且所述双源极薄膜晶体管的漏极位于所述双源极薄膜晶体管的第一源极和第二源极之间。
在本发明的像素驱动电路中,所述第一像素电极上的电压为所述数据线提供的数据电压;所述第二像素电极上的电压与所述第一像素电极上的电压的关系为:
V2=(V1*L2-Vcom*L1)/(L1+L2),其中,V2为第二像素电极上的电压,V1为第一像素电极上的电压,Vcom为公共电极线提供的公共电压,L1为双源极薄膜晶体管的第一源极与漏极之间的距离,L2为双源极薄膜晶体管的第二源极与漏极之间的距离。
在本发明的像素驱动电路中,所述扫描线、所述薄膜晶体管的栅极和所述双源极薄膜晶体管的栅极可通过同一金属层制作,
在本发明的像素驱动电路中,所述薄膜晶体管的栅极和所述双源极薄膜晶体管的栅极共享同一电极。
在本发明的像素驱动电路中,所述数据线、所述薄膜晶体管的源极和漏极、及所述双源极薄膜晶体管的第一源极、第二源极和漏极可通过同一金属层制作。
在本发明的像素驱动电路中,所述薄膜晶体管的源极和所述双源极薄膜晶体管的第一源极共享同一电极。
在本发明的像素驱动电路中,所述第一像素电极和所述第二像素电极均对应四个畴的液晶分子。
为实现上述目的,本发明还提供一种液晶显示面板,其包括以上所述的像素驱动电路。
本发明提供的像素驱动电路及液晶显示面板,将第二开关管的第一端、第二端、第三端分别与数据线、公共电极线、第二像素电极连接,通过控制第二开关管的第一端、第二端、第三端的导通,使得第二像素电极上的电压处于数据线提供的数据电压和公共电极线提供的公共电压之间,进而使得第一像素电极和第二像素电极之间形成预定电压差,在解决色偏问题的同时,能获得较高的开口率,并且不会增加额外的寄生电容,进而提高显示效果。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明优选实施例提供的像素驱动电路的示意图。
图2为本发明优选实施例提供的像素驱动电路中第二开关管的结构示意图。
图3为本发明优选实施例提供的像素驱动电路中第一开关管和第二开关管的第一结构示意图。
图4为本发明优选实施例提供的像素驱动电路中第一开关管和第二开关管的第二结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
请参阅图1,图1为本发明优选实施例提供的像素驱动电路的示意图。如图1所示,该像素驱动电路包括:多条扫描线和多条数据线交叉限定的多个子像素单元,每个子像素单元均连接一扫描线以及一数据线。本优选实施例仅仅示例性的标示出一条扫描线Gate、一条数据线Date以及一个子像素单元10。
每个子像素单元10均包括第一开关管T1、第二开关管T2、第一像素电极101以及第二像素电极102。其中,该第一开关管T1具有控制端a、第一端b及第二端c,第一开关管T1的控制端与扫描线Gate连接,第一开关管T1的第一端b与数据线Date连接,第一开关管T1的第二端c与第一像素电极101连接,用于在扫描线Gate提供的扫描信号的控制下,导通第一开关管T1的第一端b和第二端c,进而将数据线Date提供的数据电压输出至第一像素电极101。
第二开关管T2具有控制端d、第一端e、第二端f及第三端g,第二开关管T2的控制端d与扫描线连接,第二开关管T2的第一端e与数据线连接,第二开关管T2的第二端f与公共电极线连接,第二开关管T2的第三端g与第二像素电极102连接,用于在扫描线Gate提供的扫描信号的控制下,导通所述第二开关管的第一端e、第二端f和第三端g,进而将数据线Date提供的数据电压以及公共电极线Com提供的公共电压输出至第二像素电极102,以使第一像素电极101和第二像素电极102之间形成预定电压差。
进一步的,第一像素电极101与公共电极103平行放置形成第一液晶电容Clc1,第一像素电极101与公共电极线Com平行放置形成第一存储电容Cst1;第二像素电极102与公共电极103平行放置形成第二液晶电容Clc2,第二像素电极102与公共电极线Com平行放置形成第二存储电容Cst2。其中,公共电极103和公共电极线Com上的电压相同,第一液晶电容Clc1用于给第一像素电极101对应的液晶分子提供偏转电压,第一存储电容Cst1用于给第一液晶电容Clc1提供电压维持电荷,第二液晶电容Clc2用于给第二像素电极102对应的液晶分子提供偏转电压,第二存储电容Cst2用于给第二液晶电容Clc2提供电压维持。优选的,第一像素电极101和第二像素电极102均对应四个畴的液晶分子,通过在第一像素电极101和第二像素电极102上施加不同的电压,从而实现八畴显示。
在本优选实施例中,该第一开关管T1为薄膜晶体管,其中,第一开关管T1的控制端a、第一端b、第二端c分别为薄膜晶体管的栅极、源极、漏极;该第二开关管T2为双源极薄膜晶体管,其中,第二开关管T2的控制端d、第一端e、第二端f、第三端g分别为双源极薄膜晶体管的栅极、第一源极、第二源极、漏极。
请参阅图2,图2为本发明优选实施例提供的像素驱动电路中第二开关管的结构示意图。如图2所示,该第二开关管T2的结构为:从上至下依次包括衬底201、栅极202、绝缘层203和导电沟道层204,以及位于导电沟道层204上的第一源极205、第二源极206和漏极207。具体的,该双源极薄膜晶体管的第一源极205、第二源极206、漏极207处于同一层,且该双源极薄膜晶体管的漏极207位于第一源极205和第二源极206之间。其中,双源极薄膜晶体管的第一源极205与漏极207之间的距离为L1,双源极薄膜晶体管的第二源极206与漏极207之间的距离为L2,本领域技术人员可根据需要设置L1和L2的值。
具体的,双源极薄膜晶体管的第一源极205与数据线Data连接,双源极薄膜晶体管第二源极206与公共电极线Com连接,双源极薄膜晶体管的漏极207与第二像素电极102连接,双源极薄膜晶体管的栅极202与扫描线Gate连接。该第二像素电极102上的电压与数据线Data提供的数据电压的关系为:V2=(V1*L2-Vcom*L1)/(L1+L2),其中,V2为第二像素电极102上的电压,V1为数据线Data提供的数据电压,Vcom为公共电极线Com提供的公共电压,L1为双源极薄膜晶体管的第一源极205与漏极207之间的距离,L2为双源极薄膜晶体管的第二源极206与漏极207之间的距离。
薄膜晶体管的源极与数据线Data连接,薄膜晶体管的漏极与第一像素电极101连接,薄膜晶体管的栅极与扫描线Gate连接。该第一像素电极101上的电压与数据线Data提供的数据电压的关系为:V3=V1,其中,V3为第一像素电极101上的电压,V1为数据线Data提供的数据电压。
下面请参阅图3、图4,图3为本发明优选实施例提供的像素驱动电路中第一开关管和第二开关管的第一结构示意图;图4为本发明优选实施例提供的像素驱动电路中第一开关管和第二开关管的第二结构示意图。
如图1、图2、图3所示,第一开关管T1为薄膜晶体管,第二开关管T2为双源极薄膜晶体管。其中,薄膜晶体管的栅极和双源极薄膜晶体管的栅极均连接至一扫描线Gate,扫描线Gate、薄膜晶体管的栅极和双源极薄膜晶体管的栅极可通过同一金属层制作,且薄膜晶体管的栅极和双源极薄膜晶体管的栅极共享同一电极。
薄膜晶体管的源极和双源极薄膜晶体管的第一源极均连接至一数据线Data,双源极薄膜晶体管的第二源极连接至公共电极线Com,数据线Data、薄膜晶体管的源极和漏极、及双源极薄膜晶体管的第一源极、第二源极和漏极可通过同一金属层制作,且薄膜晶体管的源极和双源极薄膜晶体管的第一源极共享同一电极。
另外,薄膜晶体管的漏极连接第一像素电极101,双源极薄膜晶体管的漏极连接第二像素电极102。
需要说明的是,图3、图4为两种不同的结构,但其实现的功能一致。图3与图4的区别在于,图3中用于形成薄膜晶体管的源极和用于形成双源极薄膜晶体管的第一源极、第二源极的电极为条状,而图4中于形成薄膜晶体管的源极和用于形成双源极薄膜晶体管的第一源极、第二源极的电极为弯曲状。
如图1、图2、图4所示,第一开关管T1为薄膜晶体管,第二开关管T2为双源极薄膜晶体管。其中,薄膜晶体管的栅极和双源极薄膜晶体管的栅极均连接至一扫描线Gate,扫描线Gate、薄膜晶体管的栅极和双源极薄膜晶体管的栅极可通过同一金属层制作,且薄膜晶体管的栅极和双源极薄膜晶体管的栅极共享同一电极。
薄膜晶体管的源极和双源极薄膜晶体管的第一源极均连接至一数据线Data,双源极薄膜晶体管的第二源极连接至公共电极线Com,数据线Data、薄膜晶体管的源极和漏极、及双源极薄膜晶体管的第一源极、第二源极和漏极可通过同一金属层制作,且薄膜晶体管的源极和双源极薄膜晶体管的第一源极共享同一电极。
另外,薄膜晶体管的漏极连接第一像素电极101,双源极薄膜晶体管的漏极连接第二像素电极102。
本发明提供的像素驱动电路,将第二开关管的第一端、第二端、第三端分别与数据线、公共电极线、第二像素电极连接,通过控制第二开关管的第一端、第二端、第三端的导通,使得第二像素电极上的电压处于数据线提供的数据电压和公共电极线提供的公共电压之间,进而使得第一像素电极和第二像素电极之间形成预定电压差,在解决色偏问题的同时,能获得较高的开口率,并且不会增加额外的寄生电容,进而提高显示效果。
本发明还提供一种液晶显示面板,其包括以上所述的像素驱动电路,具体可参照上述对该像素驱动电路的描述,在此不做赘述。
本发明提供的像素驱动电路及液晶显示面板,将第二开关管的第一端、第二端、第三端分别与数据线、公共电极线、第二像素电极连接,通过控制第二开关管的第一端、第二端、第三端的导通,使得第二像素电极上的电压处于数据线提供的数据电压和公共电极线提供的公共电压之间,进而使得第一像素电极和第二像素电极之间形成预定电压差,在解决色偏问题的同时,能获得较高的开口率,并且不会增加额外的寄生电容,进而提高显示效果。
以上对本发明实施例提供的液晶显示组件进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明。同时,对于本领域的技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。

Claims (10)

1.一种像素驱动电路,包括:多条扫描线和多条数据线交叉限定的多个子像素单元,每个所述子像素单元均连接一扫描线以及一数据线,每个所述子像素单元均包括第一开关管、第二开关管、第一像素电极以及第二像素电极,其特征在于,
所述第一开关管具有控制端、第一端及第二端,所述第一开关管的控制端与所述扫描线连接,所述第一开关管的第一端与所述数据线连接,所述第一开关管的第二端与所述第一像素电极连接,用于在所述扫描线提供的扫描信号的控制下,导通所述第一开关管的第一端和第二端;
所述第二开关管具有控制端、第一端、第二端及第三端,所述第二开关管的控制端与所述扫描线连接,所述第二开关管的第一端与所述数据线连接,所述第二开关管的第二端与公共电极线连接,所述第二开关管的第三端与所述第二像素电极连接,用于在所述扫描线提供的扫描信号的控制下,导通所述第二开关管的第一端、第二端和第三端,以使所述第一像素电极和所述第二像素电极之间形成预定电压差。
2.根据权利要求1所述的像素驱动电路,其特征在于,所述第一开关管为薄膜晶体管,所述第一开关管的控制端、第一端、第二端分别为所述薄膜晶体管的栅极、源极、漏极;
所述第二开关管为双源极薄膜晶体管,所述第二开关管的控制端、第一端、第二端、第三端分别为所述双源极薄膜晶体管的栅极、第一源极、第二源极、漏极。
3.根据权利要求2所述的像素驱动电路,其特征在于,所述双源极薄膜晶体管的第一源极、第二源极、漏极处于同一层,且所述双源极薄膜晶体管的漏极位于所述双源极薄膜晶体管的第一源极和第二源极之间。
4.根据权利要求3所述的像素驱动电路,其特征在于,所述第一像素电极上的电压为所述数据线提供的数据电压;所述第二像素电极上的电压与所述第一像素电极上的电压的关系为:
V2=(V1*L2-Vcom*L1)/(L1+L2),其中,V2为第二像素电极上的电压,V1为第一像素电极上的电压,Vcom为公共电极线提供的公共电压,L1为双源极薄膜晶体管的第一源极与漏极之间的距离,L2为双源极薄膜晶体管的第二源极与漏极之间的距离。
5.根据权利要求2所述的像素驱动电路,其特征在于,所述扫描线、所述薄膜晶体管的栅极和所述双源极薄膜晶体管的栅极可通过同一金属层制作。
6.根据权利要求5所述的像素驱动电路,其特征在于,所述薄膜晶体管的栅极和所述双源极薄膜晶体管的栅极共享同一电极。
7.根据权利要求2所述的像素驱动电路,其特征在于,所述数据线、所述薄膜晶体管的源极和漏极、及所述双源极薄膜晶体管的第一源极、第二源极和漏极可通过同一金属层制作。
8.根据权利要求7所述的像素驱动电路,其特征在于,所述薄膜晶体管的源极和所述双源极薄膜晶体管的第一源极共享同一电极。
9.根据权利要求1所述的像素驱动电路,其特征在于,所述第一像素电极和所述第二像素电极均对应四个畴的液晶分子。
10.一种液晶显示面板,其特征在于,包括如权利要求1-9任一项所述的像素驱动电路。
CN201711172056.5A 2017-11-22 2017-11-22 一种像素驱动电路及液晶显示面板 Expired - Fee Related CN107728352B (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201711172056.5A CN107728352B (zh) 2017-11-22 2017-11-22 一种像素驱动电路及液晶显示面板
EP17933031.1A EP3715939A4 (en) 2017-11-22 2017-11-28 PIXEL ATTACK CIRCUIT AND LIQUID CRYSTAL DISPLAY PANEL
JP2020524746A JP6994571B2 (ja) 2017-11-22 2017-11-28 画素駆動回路及び液晶表示パネル
KR1020207016627A KR102262884B1 (ko) 2017-11-22 2017-11-28 화소 구동 회로 및 액정 표시 패널
PCT/CN2017/113336 WO2019100416A1 (zh) 2017-11-22 2017-11-28 一种像素驱动电路及液晶显示面板

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711172056.5A CN107728352B (zh) 2017-11-22 2017-11-22 一种像素驱动电路及液晶显示面板

Publications (2)

Publication Number Publication Date
CN107728352A CN107728352A (zh) 2018-02-23
CN107728352B true CN107728352B (zh) 2020-05-05

Family

ID=61216623

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711172056.5A Expired - Fee Related CN107728352B (zh) 2017-11-22 2017-11-22 一种像素驱动电路及液晶显示面板

Country Status (5)

Country Link
EP (1) EP3715939A4 (zh)
JP (1) JP6994571B2 (zh)
KR (1) KR102262884B1 (zh)
CN (1) CN107728352B (zh)
WO (1) WO2019100416A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108154863B (zh) * 2018-02-28 2019-09-17 深圳市华星光电技术有限公司 像素驱动电路、像素驱动方法和液晶显示装置
CN108389557B (zh) 2018-03-16 2020-01-21 京东方科技集团股份有限公司 显示装置及其驱动方法
CN108957814B (zh) * 2018-08-29 2021-08-13 南京京东方显示技术有限公司 一种液晶显示装置及电路补偿方法
CN110361899B (zh) * 2019-06-27 2021-09-10 厦门天马微电子有限公司 一种显示装置
CN115576139B (zh) * 2022-10-31 2024-12-17 惠科股份有限公司 显示面板及其制备方法、电子设备

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3256730B2 (ja) * 1996-04-22 2002-02-12 シャープ株式会社 液晶表示装置、およびその駆動方法
CN101750812A (zh) * 2008-12-12 2010-06-23 奇美电子股份有限公司 液晶显示装置
WO2012014861A1 (ja) * 2010-07-27 2012-02-02 シャープ株式会社 表示装置
WO2012157720A1 (ja) * 2011-05-18 2012-11-22 シャープ株式会社 液晶パネル、液晶表示装置
CN104024933A (zh) * 2011-10-31 2014-09-03 夏普株式会社 薄膜晶体管阵列基板和液晶显示装置
CN104298032A (zh) * 2014-08-25 2015-01-21 京东方科技集团股份有限公司 一种液晶显示面板及其调校方法
CN104360556A (zh) * 2014-11-21 2015-02-18 深圳市华星光电技术有限公司 一种液晶显示面板及阵列基板
CN104536225A (zh) * 2014-12-31 2015-04-22 深圳市华星光电技术有限公司 液晶显示面板及液晶显示装置
CN104777638A (zh) * 2015-04-13 2015-07-15 深圳市华星光电技术有限公司 液晶显示面板及液晶显示装置
CN104865763A (zh) * 2015-06-12 2015-08-26 深圳市华星光电技术有限公司 阵列基板

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100764051B1 (ko) * 2001-02-01 2007-10-08 삼성전자주식회사 픽셀 당 2 개의 박막 트랜지스터를 구비하는 박막 액정 디스플레이 장치
KR20040021893A (ko) * 2002-09-05 2004-03-11 삼성전자주식회사 액정 표시 장치 및 그 구동 방법
US7317434B2 (en) * 2004-12-03 2008-01-08 Dupont Displays, Inc. Circuits including switches for electronic devices and methods of using the electronic devices
KR20070081255A (ko) * 2006-02-10 2007-08-16 삼성전자주식회사 시프트 레지스터
TWI352868B (en) * 2006-11-03 2011-11-21 Au Optronics Corp Liquid crystal display pannel and active device ar
CN100426504C (zh) * 2006-11-06 2008-10-15 北京京东方光电科技有限公司 一种单栅双沟道像素结构
TWI375198B (en) * 2007-05-17 2012-10-21 Tpo Displays Corp A system for displaying images
US7633089B2 (en) 2007-07-26 2009-12-15 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and electronic device provided with the same
CN101510030B (zh) * 2008-02-15 2012-07-18 奇美电子股份有限公司 液晶显示面板及其制造方法
US8106864B2 (en) * 2008-10-10 2012-01-31 Lg Display Co., Ltd. Liquid crystal display device
TWI412852B (zh) * 2009-10-15 2013-10-21 Chunghwa Picture Tubes Ltd 具有電荷分享架構之顯示面板之畫素結構及其驅動方法
KR101833498B1 (ko) 2010-10-29 2018-03-02 삼성디스플레이 주식회사 액정 표시 장치
KR101929363B1 (ko) 2011-11-30 2018-12-17 삼성디스플레이 주식회사 액정 표시 장치
CN103353697B (zh) * 2013-07-19 2015-11-25 深圳市华星光电技术有限公司 一种阵列基板及液晶显示面板
CN103488018B (zh) 2013-09-25 2016-03-23 深圳市华星光电技术有限公司 液晶显示装置及其显示控制方法
CN204065625U (zh) * 2014-10-10 2014-12-31 京东方科技集团股份有限公司 一种阵列基板及液晶显示装置
KR102493218B1 (ko) 2016-04-04 2023-01-30 삼성디스플레이 주식회사 액정 표시 장치
KR20170117261A (ko) * 2016-04-12 2017-10-23 삼성디스플레이 주식회사 액정 표시 장치 및 이의 제조 방법
CN106647078A (zh) * 2017-01-11 2017-05-10 深圳市华星光电技术有限公司 像素结构及液晶显示器
CN107065350B (zh) * 2017-04-10 2019-10-25 深圳市华星光电半导体显示技术有限公司 八畴3t像素结构
CN107065352B (zh) * 2017-04-17 2019-11-05 深圳市华星光电半导体显示技术有限公司 八畴像素结构

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3256730B2 (ja) * 1996-04-22 2002-02-12 シャープ株式会社 液晶表示装置、およびその駆動方法
CN101750812A (zh) * 2008-12-12 2010-06-23 奇美电子股份有限公司 液晶显示装置
WO2012014861A1 (ja) * 2010-07-27 2012-02-02 シャープ株式会社 表示装置
WO2012157720A1 (ja) * 2011-05-18 2012-11-22 シャープ株式会社 液晶パネル、液晶表示装置
CN104024933A (zh) * 2011-10-31 2014-09-03 夏普株式会社 薄膜晶体管阵列基板和液晶显示装置
CN104298032A (zh) * 2014-08-25 2015-01-21 京东方科技集团股份有限公司 一种液晶显示面板及其调校方法
CN104360556A (zh) * 2014-11-21 2015-02-18 深圳市华星光电技术有限公司 一种液晶显示面板及阵列基板
CN104536225A (zh) * 2014-12-31 2015-04-22 深圳市华星光电技术有限公司 液晶显示面板及液晶显示装置
CN104777638A (zh) * 2015-04-13 2015-07-15 深圳市华星光电技术有限公司 液晶显示面板及液晶显示装置
CN104865763A (zh) * 2015-06-12 2015-08-26 深圳市华星光电技术有限公司 阵列基板

Also Published As

Publication number Publication date
KR102262884B1 (ko) 2021-06-09
WO2019100416A1 (zh) 2019-05-31
EP3715939A1 (en) 2020-09-30
KR20200079327A (ko) 2020-07-02
JP2021501915A (ja) 2021-01-21
JP6994571B2 (ja) 2022-01-14
EP3715939A4 (en) 2021-08-04
CN107728352A (zh) 2018-02-23

Similar Documents

Publication Publication Date Title
CN107728352B (zh) 一种像素驱动电路及液晶显示面板
US8941793B2 (en) Liquid crystal display to increase side view visibility
US8643802B2 (en) Pixel array, polymer stablized alignment liquid crystal display panel, and pixel array driving method
CN206002819U (zh) 阵列基板及显示器件
US8947472B2 (en) Pixel array
US10083664B1 (en) Thin film transistor array substrate and display panel
CN204302636U (zh) 一种显示装置
US9646553B2 (en) Display device
US9536484B2 (en) Liquid crystal array substrate and electronic device
CN104503161B (zh) 像素电极、阵列基板、显示面板
US8576365B2 (en) Display panel
CN101504503A (zh) 像素阵列、液晶显示面板以及光电装置
JP2006330634A (ja) 液晶表示装置
US10902805B2 (en) Pixel structure
US8884299B2 (en) Pixel structure of display panel
CN105467639A (zh) 液晶显示面板及其驱动方法
US8451393B2 (en) Liquid crystal display
WO2015010422A1 (zh) 液晶显示面板和显示装置
US8115878B2 (en) Thin film transistor array substrate and liquid crystal display
CN106094382A (zh) 显示面板、显示装置及其驱动方法
US8045079B2 (en) Display device
US9568784B2 (en) Liquid crystal display panel and driving method thereof
JP2014533848A (ja) アレイ基板及び液晶パネル
US20160109763A1 (en) Curved display device
US9541804B2 (en) Liquid crystal display

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200505