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CN109613777B - 显示面板和显示装置 - Google Patents

显示面板和显示装置 Download PDF

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Publication number
CN109613777B
CN109613777B CN201910097770.5A CN201910097770A CN109613777B CN 109613777 B CN109613777 B CN 109613777B CN 201910097770 A CN201910097770 A CN 201910097770A CN 109613777 B CN109613777 B CN 109613777B
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Prior art keywords
scanning
pixel
electrode
scan
display panel
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CN109613777A (zh
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康志聪
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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Priority to CN201910097770.5A priority Critical patent/CN109613777B/zh
Priority to US16/982,794 priority patent/US11079642B2/en
Priority to PCT/CN2019/076169 priority patent/WO2020155253A1/zh
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    • 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
    • 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
    • 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
    • G02F1/1368Active matrix addressed cells in which the switching element is a three-electrode device
    • 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices 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
    • H01L27/12Devices 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 the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices 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 the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/124Devices 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 the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices 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
    • H01L27/12Devices 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 the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214Devices 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 the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1255Devices 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 the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs integrated with passive devices, e.g. auxiliary capacitors
    • 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
    • G02F2201/12Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/123Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode pixel
    • 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
    • G09G2300/0465Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
    • 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
    • G09G2320/0219Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
    • 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
    • G09G2320/0247Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes

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

Abstract

本申请公开了一种显示面板,所述显示面板包括多条数据线,多条扫描线和多个像素,所述扫描线包括主扫描电极和支扫描电极,同一所述扫描线的所述主扫描电极和所述支扫描电极电连接,至少部分所述支扫描电极沿所述数据线的延伸方向延伸且与所述数据线相邻设置;所述像素包括像素电极,所述像素电极与所述支扫描电极部分重叠,以形成存储电容。本申请还公开了一种显示装置。本申请可在保障显示面板中像素开口率的同时,减小因反冲而导致的闪烁。

Description

显示面板和显示装置
技术领域
本申请涉及显示技术领域,尤其涉及一种显示面板和显示装置。
背景技术
在显示面板中,通过数据线上的数据信号为像素充电,以控制像素的显示灰度,从而显示一定的图像。由于像素中开关器件的源极和栅极之间存在寄生电容,导致扫描线上的扫描信号的变化将通过寄生电容耦合到像素电极上,使像素电极的电位发生变化,产生反冲(kick back)现象,进而导致显示画面出现闪烁,使显示质量下降。为了保持像素中像素电极的电位,在像素中还设置有存储电容,且存储电容越大,像素中电位保持效果越好。然而,现有的存储电容由非透明的公共线或扫描线与透明的像素电极共同形成,并通过改变扫描线或公共线与像素电极之间的重叠面积而改变存储电容。相应的,随着所需的存储电容的增大,像素的开口率将会减小,在背光光源功耗不变的情况下,显示亮度将会随之减弱,而为了维持显示亮度,又将导致所需的背光光源的功耗上升,造成能源的浪费。
发明内容
本申请的主要目的在于提供一种显示面板,旨在解决上述像素的存储电容增大导致其开口率减小的技术问题,在保障显示面板中像素开口率的同时,减小因反冲而导致的闪烁,从而改善显示效果。
为实现上述目的,本申请提供一种显示面板,所述显示面板包括多条数据线,多条扫描线和多个像素,所述扫描线包括主扫描电极和支扫描电极,同一所述扫描线的所述主扫描电极和所述支扫描电极电连接,至少部分所述支扫描电极沿所述数据线的延伸方向延伸且与所述数据线相邻设置;所述像素包括像素电极,所述像素电极与所述支扫描电极部分重叠,以形成存储电容。
可选地,所述像素电极与所述主扫描电极和所述支扫描电极部分重叠,以形成存储电容。
可选地,一所述像素电极与两所述支扫描电极部分重叠,两所述支扫描电极分设于所述像素电极的两侧。
可选地,所述像素电极与前一级所述扫描线的所述支扫描电极和/或所述主扫描电极部分重叠。
可选地,当所述显示面板处于运行状态时,所述扫描线上的扫描信号包括有高电平和第一低电平,所述高电平高于所述第一低电平,其中,前一级扫描线上扫描信号的高电平下降沿与本级扫描线上扫描信号的高电平上升沿相同步。
可选地,所述像素还包括开关器件,所述开关器件包括源极、漏极和栅极,其中,源极和栅极之间形成寄生电容Cgs;当所述显示面板处于运行状态时,所述扫描线上的扫描信号包括有高电平Vgh、第一低电平Vgl1和第二低电平Vgl2,所述高电平Vgh高于所述第一低电平Vgl1,所述第一低电平Vgl1高于所述第二低电平Vgl2,所述第二低电平Vgl2位于所述高电平Vgh的下降沿侧,且所述第二低电平Vgl2的第二持续时长与所述高电平Vgh的第一持续时长的两倍相当,前一级扫描线上扫描信号的高电平下降沿与本级扫描线上扫描信号的高电平上升沿相同步;所述存储电容Cst满足Cst=(Vgh-Vgl1)*Cgs/(Vgl1-Vgl2)。
可选地,所述像素还包括开关器件,所述开关器件包括源极、漏极和栅极,其中,源极和栅极之间形成寄生电容Cgs;当所述显示面板处于运行状态时,所述扫描线上的扫描信号包括有高电平Vgh、第一低电平Vgl1和第二低电平Vgl2,所述高电平Vgh高于所述第一低电平Vgl1,所述第一低电平Vgl1高于所述第二低电平Vgl2,所述第二低电平Vgl2位于所述高电平Vgh的下降沿侧,且所述第二低电平Vgl2的第二持续时长与所述高电平Vgh的第一持续时长相当,前一级扫描线上扫描信号的高电平下降沿与本级扫描线上扫描信号的高电平上升沿相同步;所述存储电容Cst满足Cst=(Vgh-Vgl1)*Cgs/(Vgl1-Vgl2)。
可选地,所述像素电极与后一级所述扫描线的所述支扫描电极和/或所述主扫描电极部分重叠。
可选地,所述像素还包括开关器件,所述开关器件包括源极、漏极和栅极,其中,源极和栅极之间形成寄生电容Cgs;当所述显示面板处于运行状态时,所述扫描线上的扫描信号包括有高电平Vgh、第一低电平Vgl1和第二低电平Vgl2,所述高电平Vgh高于所述第一低电平Vgl1,所述第一低电平Vgl1高于所述第二低电平Vgl2,所述第二低电平Vgl2位于所述高电平Vgh的上升沿侧,且所述第二低电平Vgl2的第二持续时长与所述高电平Vgh的第一持续时长相当,本级扫描线上扫描信号的高电平下降沿与后一级扫描线上扫描信号的高电平上升沿相同步;所述存储电容Cst满足Cst=(Vgh-Vgl1)*Cgs/(Vgl1-Vgl2)。
为实现上述目的,本申请还提出一种显示装置,所述显示装置包括显示面板,所述显示面板包括多条数据线,多条扫描线和多个像素,所述扫描线包括主扫描电极和支扫描电极,同一所述扫描线的所述主扫描电极和所述支扫描电极电连接,至少部分所述支扫描电极沿所述数据线的延伸方向延伸且与所述数据线相邻设置;所述像素包括像素电极,所述像素电极与所述支扫描电极部分重叠,以形成存储电容。
本申请技术方案中,显示面板包括多条数据线,多条扫描线和多个像素,扫描线包括主扫描电极和支扫描电极,同一扫描线的主扫描电极和支扫描电极电连接,至少部分所述支扫描电极沿所述数据线的延伸方向延伸且与所述数据线相邻设置;像素包括像素电极,像素电极与支扫描电极部分重叠,以形成存储电容。通过设置与数据线相邻的支扫描电极,并由支扫描电极与像素电极共同形成存储电容,充分利用了像素电极和数据线之间的空间。同时,支扫描电极还可以屏蔽数据线上的数据信号对像素电极的电位的干扰,使得像素电极和数据线之间的最小距离可以进一步减小,从而避免了对像素的开口率的牺牲,甚至可以通过减小像素电极和数据线之间的最小距离以实现增大开口率的效果。开口率的增大使所需的背光光源的功耗降低,有助于节约能源。存储电容的大小与像素电极和支扫描电极之间的重叠面积呈正相关关系,通过调节像素电极和支扫描电极之间的重叠面积,可以获得所需的存储电容,以减小像素电极的电位受到扫描信号的影响而产生的反冲,缓解显示画面中的闪烁现象,改善显示效果。
附图说明
图1是一范例的显示面板的结构示意图;
图2是图1中显示面板的电路结构示意图;
图3是图1中显示面板的信号时序示意图;
图4是另一范例的显示面板的结构示意图;
图5是图4中显示面板的电路结构示意图;
图6是图4中显示面板的信号时序示意图;
图7是本申请显示面板一实施例的结构示意图;
图8是本申请显示面板另一实施例的结构示意图;
图9是图7和图8中显示面板的电路结构示意图;
图10是图7和图8中显示面板一具体示例的信号时序示意图;
图11是图7和图8中显示面板另一具体示例的信号时序示意图;
图12是图7和图8中显示面板又一具体示例的信号时序示意图;
图13是本申请又一实施例的结构示意图;
图14是本申请再一实施例的结构示意图;
图15是图13和图14中显示面板的电路结构示意图;
图16是图13和图14中显示面板的信号时序示意图。
本申请目的的实现、功能特点及优点将结合实施例,参照附图做进一步说明。
具体实施方式
下面将结合本申请实施例中的附图,对本申请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申请的一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通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,都属于本申请保护的范围。
需要说明,若本申请实施例中有涉及方向性指示(诸如上、下、左、右、前、后……),则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等,如果该特定姿态发生改变时,则该方向性指示也相应地随之改变。
另外,若本申请实施例中有涉及“第一”、“第二”等的描述,则该“第一”、“第二”等的描述仅用于描述目的,而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外,全文中出现的“和/或”的含义为,包括三个并列的方案,以“A和/或B”为例,包括A方案,或B方案,或A和B同时满足的方案。另外,各个实施例之间的技术方案可以相互结合,但是必须是以本领域普通技术人员能够实现为基础,当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在,也不在本申请要求的保护范围之内。
图1所示是一范例的显示面板的结构示意图,显示面板包括多个像素(图1中所示为一个像素及其周围数据线和扫描线的结构),多条数据线200’、多条扫描线300’和多条公共线400’。其中,像素通常呈矩形阵列状排布,像素包括像素电极110’和开关器件120’。开关器件120’通常为薄膜晶体管TFT’,在扫描线上的扫描信号作用下,薄膜晶体管TFT’控制数据线向对应的像素充电。通常,在显示面板中包括红像素、绿像素和蓝像素三种像素,至少一红像素、一绿像素和一蓝像素形成一像素组,从而根据空间混色原理显示彩色画面。像素在扫描线300’上的扫描信号G(n)’和数据线200’上的数据信号的共同作用下,产生一定的显示灰度。为了保持像素电极110’上的电位,以保持显示效果,公共线400’包括公共电极410’,像素电极110’与公共电极410’至少部分重叠以形成存储电容。在图1中,公共电极410’与部分像素电极110’重叠而形成存储电容。图2所示是图1中显示面板的电路结构示意图,其中,Cst’为该像素的存储电容,即公共电极410’和像素电极110’之间形成的电容,Clc’为该像素的液晶电容,Cgs’为该像素中开关器件120’的源极和栅极之间的寄生电容。图3所示是图1中显示面板的信号时序示意图,其中,Vcom’为公共线400’上公共信号的电平,Vgh’为扫描线300’上扫描信号G(n)’的高电平,Vgl’为扫描线300’上扫描信号G(n)’的低电平。当扫描信号G(n)’由高电平Vgh’转换为低电平Vgl’,即扫描线由开启状态转换为关闭状态时,同一级像素电极110’上的像素电平P(n)’将会变化ΔV’,根据图2可知,ΔV’=(Vgh’-Vgl’)*Cgs’/(Cgs’+Cst’+Clc’)。
图4所示是另一范例中显示面板的结构示意图,显示面板包括多个像素(图4中所示为一个像素及其周围数据线和扫描线的结构),多条数据线200’和多条扫描线300’。其中,像素包括像素电极110’和开关器件120’。开关器件120’通常为薄膜晶体管TFT’,在扫描线上的扫描信号作用下控制数据线向对应的像素充电。前一级扫描线300’的一部分向本级像素方向延伸,形成扫描电极310’,其中,前一级扫描线是指与本级像素相邻的扫描线,并与前一级像素电连接,像素电极110’与扫描电极310’至少部分重叠以形成存储电容。在图4中,扫描电极310’与部分像素电极110’重叠而形成存储电容。图5所示是图4中显示面板的电路结构示意图,其中,Cst’为该像素的存储电容,Clc’为该像素的液晶电容,Cgs’为该像素中开关器件120’的源极和栅极之间的寄生电容。如图6所示,当扫描线300’上的扫描信号由高电平Vgh’转换为低电平Vgl’,即扫描线由开启状态转换为关闭状态时,像素电极110’上的像素电平P(n)’所产生的变化为ΔV’,其中,ΔV’=(Vgh’-Vgl’)*Cgs’/(Cgs’+Cst’+Clc’)。
根据上述范例可知,在显示面板中,为了尽可能减小像素电极上的像素电平的变化,以减少显示面板中画面的闪烁,改善显示效果,在其他条件不变的情况下,应尽可能增大存储电容。然而,存储电容与像素电极和公共电极,或像素电极和扫描电极的重叠面积有关,重叠面积越大,存储电容Cst越大。另一方面,考虑到虽然像素电极通常由透明的铟锡氧化物(ITO)制成,但扫描电极和公共电极通常是由非透明的金属制成,在图1和图4所示的范例中,非透明的扫描电极和公共电极将导致像素中透光面积的减小,即像素的开口率下降,使显示面板的显示亮度整体下降,或者所需的背光光源的能耗上升。
本申请提出一种显示面板,旨在保持像素开口率的同时,减小像素电平的反冲,以改善显示效果。在本申请的一实施例中,如图7所示,显示面板包括多条数据线200,多条扫描线300和多个像素,扫描线300包括主扫描电极310和支扫描电极320,同一扫描线300的主扫描电极310和支扫描电极320电连接,至少部分支扫描电极320沿数据线200的延伸方向延伸且与数据线200相邻设置;像素包括像素电极110,像素电极110与支扫描电极320部分重叠,以形成存储电容。
后文中将以液晶显示面板为例,对本申请的技术方案详细阐述。如图7所示,数据线200可以沿显示面板的纵向延伸,且多条数据线200沿显示面板的横向排布。扫描线300包括主扫描电极310和支扫描电极320,其中,主扫描电极310可以沿显示面板的横向延伸,且多条主扫描电极310沿显示面板的纵向排布,支扫描电极320可以部分沿显示面板的纵向延伸,部分沿横向延伸,或支扫描电极320整体沿显示面板的纵向延伸,即沿数据线的延伸方向延伸,且多条支扫描电极320沿显示面板的横向排布。支扫描电极320与数据线200相邻设置,由于支扫描电极320通常由金属制成,因此可以形成对数据线200上数据信号的屏蔽,从而减少了数据信号对像素电极的像素电平的干扰。像素包括像素电极110,像素电极110与支扫描电极320部分重叠以形成存储电容。当像素电极110与支扫描电极320的重叠面积越大时,存储电容越大。考虑到支扫描电极320对数据信号的屏蔽作用,在本实施例中,即使像素电极110与数据线200之间的距离较小,也能够保障正常的显示效果,因此,可以将像素电极110向数据线200的方向延伸,以增大像素电极110和支扫描电极320之间的重叠面积,从而在增大存储电容的同时增大像素的开口率。
在本实施例中,显示面板包括多条数据线200,多条扫描线300和多个像素,扫描线300包括主扫描电极310和支扫描电极320,同一扫描线300的主扫描电极310和支扫描电极320电连接,至少部分支扫描电极320沿数据线200的延伸方向延伸且与数据线200相邻设置;像素包括像素电极110,像素电极110与支扫描电极320部分重叠,以形成存储电容。通过设置与数据线200相邻的支扫描电极320,并由支扫描电极320与像素电极110共同形成存储电容,充分利用了像素电极110和数据线200之间的空间。同时,支扫描电极320还可以屏蔽数据线200上的数据信号对像素电极110的电位的干扰,使得像素电极110和数据线200之间的最小距离可以进一步减小,从而避免了对像素的开口率的牺牲,甚至可以通过减小像素电极110和数据线200之间的最小距离以实现增大开口率的效果。开口率的增大使所需的背光光源的功耗降低,有助于节约能源。存储电容的大小与像素电极和支扫描电极之间的重叠面积呈正相关关系,通过调节像素电极和支扫描电极之间的重叠面积,可以获得所需的存储电容,以减小像素电极的电位受到扫描信号的影响而产生的反冲,缓解显示画面中的闪烁现象,改善显示效果。
在本申请的另一实施例中,如图8所示,像素电极110与主扫描电极310和支扫描电极320部分重叠,以形成存储电容。像素电极110在与支扫描电极320部分重叠之外,还与主扫描电极310部分重叠,有助于进一步增大像素电极110和扫描线300之间的重叠面积,从而增大存储电容,以减小像素电极上像素电平的反冲,避免显示面板的闪烁。并且,像素电极110向主扫描电极320的方向延伸以形成重叠区域,进一步增大了像素的开口率,从而使显示面板的显示亮度更强,或者所需的背光光源的功耗更小,以改善显示面板的显示效果。
如图7和图8所示,一像素电极110与两支扫描电极320部分重叠,两支扫描电极320分设于像素电极110的两侧。第一,在像素电极110的两侧均设置支扫描电极320,有助于进一步增大存储电容,避免因像素电平的反冲而造成显示画面的闪烁;第二,设置于两侧的支扫描电极320不会对像素的开口率造成不良影响,且像素电极110向两侧延伸,有助于进一步增大像素的开口率;第三,支扫描电极320的一边位于像素电极110和数据线200之间,有助于加强对像素电极110两侧的数据线200上数据信号的屏蔽效果,从而使像素电极110上的像素电平更加稳定,改善显示效果。
如图7和图8所示,像素电极110与前一级扫描线300的支扫描电极320和/或主扫描电极310部分重叠,通过控制扫描信号的时序,能够减小像素电极110上像素电平的反冲,以避免显示画面的闪烁。如图9所示为图7和图8中显示面板的电路结构示意图,其中,Cst为像素电极110和扫描线300的支扫描电极320和/或主扫描电极310所形成的存储电容;像素还包括开关器件120,开关器件通常为薄膜晶体管TFT,开关器件120包括源极、漏极和栅极,Cgs为开关器件的源极和栅极之间形成的寄生电容;Clc为像素的液晶电容。
如图10所示,在一具体示例中,当显示面板处于运行状态时,具体为像素被充电时,扫描线上的扫描信号G(n)包括有高电平Vgh和第一低电平Vgl1,高电平Vgh高于第一低电平Vgl1,其中,前一级扫描线上扫描信号G(n-1)的高电平下降沿与本级扫描线上扫描信号G(n)的高电平上升沿相同步。当本级扫描线上扫描信号G(n)由高电平Vgh转换为第一低电平Vgl1,即本级扫描线控制本级像素由开启转换为关闭状态时时,本级像素的像素电极110上的像素电平变化为ΔV1=(Vgh-Vgl)*Cgs/(Cgs+Cst+Clc)。根据上述关系可知,随着存储电容Cst的增大,像素电平的变化越小,即反冲效应越弱,相应的,显示效果也越好。由于像素电极110与主扫描电极10和支扫描电极320之间的重叠面积的和大于范例中像素电极与扫描电极或公共电极的重叠面积,因此,在本实施例中,通过增大存储电容,有效减小了像素电平的变化,缓解了显示面板中画面闪烁的现象。并且,像素电极向主扫描电极310和/或支扫描电极320的方向延伸,同时增大了像素的开口率。
在另一具体示例中,如图11所示,当显示面板处于运行状态时,扫描线300上的扫描信号包括有高电平Vgh、第一低电平Vgl1和第二低电平Vgl2,高电平Vgh高于第一低电平Vgl1,第一低电平Vgl1高于第二低电平Vgl2,第二低电平Vgl2位于高电平的下降沿侧,且第二低电平Vgl2的第二持续时长与高电平Vgh的第一持续时长的两倍相当,其中,前一级扫描线上扫描信号G(n-1)的高电平下降沿与本级扫描线上扫描信号G(n)的高电平上升沿相同步。当本级扫描信号G(n)从高电平Vgh转换为第二低电平Vgl2,即本级扫描线从开启转换为关闭状态时,本级像素的像素电极110上的像素电平变化为ΔV21=(Vgh-Vgl2)*Cgs/(Cgs+Cst+Clc);当前一级扫描信号G(n-1)从第二低电平Vgl2转换为第一低电平Vgl1时,本级像素的像素电极上将产生ΔV22=(Vgl2-Vgl1)*Cst/(Cgs+Cst+Clc)的像素电平变化;当本级扫描信号G(n)从第二低电平Vgl2转换为第一低电平Vgl1时,本级像素的像素电极上将产生ΔV23=(Vgl2-Vgl1)*Cgs/(Cgs+Cst+Clc)的像素电平变化。为了尽量减小反冲效应,使显示画面尽可能保持稳定,根据图11所示可知,ΔV21、ΔV22和ΔV23之间应该满足ΔV21+ΔV22+ΔV23=0,即存储电容Cst=(Vgh-Vgl1)*Cgs/(Vgl1-Vgl2)。在本示例中,可以通过改变像素电极110和扫描线300之间的重叠面积,使存储电容满足上述关系式,以实现较好的显示效果。
在又一具体示例中,如图12所示,当显示面板处于运行状态时,扫描线上的扫描信号包括有高电平Vgh、第一低电平Vgl1和第二低电平Vgl2,高电平Vgh高于第一低电平Vgl1,第一低电平Vgl1高于第二低电平Vgl2,第二低电平Vgl2位于高电平Vgh的下降沿侧,且第二低电平Vgl2的第二持续时长与高电平Vgh的第一持续时长相当,其中,前一级扫描线上扫描信号G(n-1)的高电平下降沿与本级扫描线上扫描信号G(n)的高电平上升沿相同步。当前一级扫描信号G(n-1)从第二低电平Vgl2转换为第一低电平Vgl1,同时本级扫描信号G(n)从高电平Vgh转换为第二低电平Vgl2时,本级像素的像素电极110上所产生的像素电平的变化为ΔV31=(Vgl2-Vgl1)*Cst/(Cgs+Cst+Clc)+(Vgh-Vgl2)*Cgs/(Cgs+Cst+Clc),其中,第一项对应于前一级扫描信号G(n-1)从第二低电平Vgl2转换为第一低电平Vgl1的像素电平变化,第二项对应于本级扫描信号G(n)从高电平Vgh转换为第二低电平Vgl2的像素电平变化;当本扫描信号G(n)从第二低电平Vgl2转换为第一低电平Vgl1时,本级像素的像素电极上所产生的像素电平的变化为ΔV32=(Vgl2-Vgl1)*Cgs/(Cgs+Cst+Clc)。为了尽量减小反冲效应,ΔV31和ΔV31应满足ΔV31+ΔV32=0,即存储电容Cst=(Vgh-Vgl1)*Cgs/(Vgl1-Vgl2)。在本示例中,可以通过改变像素电极110和扫描线300之间的重叠面积,使存储电容满足上述关系式,以实现较好的显示效果。
在本申请的又一实施例中,如图13所示,像素电极110与后一级扫描线300的支扫描电极320部分重叠,以形成存储电容,其中,后一级扫描线是指与本级像素相邻的扫描线,且与后一级像素电连接。
在本申请的再一实施例中,如图14所示,像素电极110与后一级扫描线300的主扫描电极310和支扫描电极320部分重叠,以形成存储电容。相比而言,像素电极110与主扫描电极310和支扫描电极320相重叠,有助于增大存储电容和像素的开口率。
如图15所示,为图13和图14中显示面板的电路结构示意图。如图16所示,为图13和图14中显示面板的信号时序示意图。为了更好地改善显示效果,可以通过控制扫描信号的时序,实现对像素电平的变化的调控。具体的,当显示面板处于运行状态时,扫描线上的扫描信号包括有高电平Vgh、第一低电平Vghl1和第二低电平Vgl2,高电平Vgh1高于第一低电平Vgl1,第一低电平Vgl1高于第二低电平Vgl2,第二低电平Vgl2位于高电平Vgh的上升沿侧,且第二低电平Vgl2的第二持续时长与高电平Vgh的第一持续时长相当,其中,本级扫描线上扫描信号G(n)的高电平下降沿与后一级扫描线上扫描信号G(n+1)的高电平上升沿相同步。当本级扫描线上的扫描信号G(n)从高电平Vgh转换为第一低电平Vgl1时,同时,后一级扫描线上的扫描信号G(n+1)从第二低电平Vgl2转换为高电平Vgh时,本级像素的像素电极110上所产生的像素电平的变化满足ΔV41=(Vgh-Vgl1)*Cgs/(Cgs+Cst+Clc)+(Vgl2-Vgh)*Cst/(Cgs+Cst+Clc),其中,第一项对应于本级扫描信号G(n)从高电平Vgh转换为第一低电平Vgl1的像素电平变化,第二项对应于后一级扫描信号G(n+1)从第二第电平Vgl2转换为高电平Vgh的像素电平变化;当后一级扫描线上扫描信号G(n+1)从高电平Vgh转换为第一低电平Vgl1时,本级像素的像素电极110上对应的像素电平的变化为ΔV42=(Vgh-Vgl1)*Cst/(Cgs+Cst+Clc)。为了尽量减小反冲效应,ΔV41和ΔV42应满足ΔV41+ΔV42=0,即存储电容Cst满足Cst=(Vgh-Vgl1)*Cgs/(Vgl1-Vgl2)。在本实施例中,可以通过改变像素电极110和扫描线300之间的重叠面积,使存储电容满足上述关系式,以实现较好的显示效果。
进一步的,本申请还提出一种显示装置,显示装置包括显示面板,该显示面板的具体结构参照上述实施例,由于本显示装置采用了上述所有实施例的全部技术方案,因此至少具有上述实施例的技术方案所带来的所有有益效果,在此不再一一赘述。
以上所述仅为本申请的可选实施例,并非因此限制本申请的专利范围,凡是在本申请的发明构思下,利用本申请说明书及附图内容所作的等效结构变换,或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (5)

1.一种显示面板,其特征在于,所述显示面板包括:
多条数据线;
多条扫描线,所述扫描线包括主扫描电极和支扫描电极,同一所述扫描线的所述主扫描电极和所述支扫描电极电连接,至少部分所述支扫描电极沿所述数据线的延伸方向延伸且与所述数据线相邻设置;
多个像素,所述像素包括像素电极,所述像素电极与所述支扫描电极部分重叠,以形成存储电容;
所述像素电极与前一级所述扫描线的所述支扫描电极和/或所述主扫描电极部分重叠;
当所述显示面板处于运行状态时,所述扫描线上的扫描信号包括有高电平和第一低电平,所述高电平高于所述第一低电平,其中,前一级扫描线上扫描信号的高电平下降沿与本级扫描线上扫描信号的高电平上升沿相同步;
所述像素还包括开关器件,所述开关器件包括源极、漏极和栅极,其中,源极和栅极之间形成寄生电容Cgs;
当所述显示面板处于运行状态时,所述扫描线上的扫描信号包括有高电平Vgh、第一低电平Vgl1和第二低电平Vgl2,所述高电平Vgh高于所述第一低电平Vgl1,所述第一低电平Vgl1高于所述第二低电平Vgl2,所述第二低电平Vgl2位于所述高电平Vgh的下降沿侧,且所述第二低电平Vgl2的第二持续时长与所述高电平Vgh的第一持续时长的两倍相当,前一级扫描线上扫描信号的高电平下降沿与本级扫描线上扫描信号的高电平上升沿相同步;
所述存储电容Cst满足Cst=(Vgh-Vgl1)*Cgs/(Vgl1-Vgl2)。
2.如权利要求1所述的显示面板,其特征在于,所述像素电极与所述主扫描电极和所述支扫描电极部分重叠,以形成存储电容。
3.如权利要求1或2所述的显示面板,其特征在于,一所述像素电极与两所述支扫描电极部分重叠,两所述支扫描电极分设于所述像素电极的两侧。
4.如权利要求1或2所述的显示面板,其特征在于,所述像素电极与后一级所述扫描线的所述支扫描电极和/或所述主扫描电极部分重叠。
5.一种显示装置,其特征在于,所述显示装置包括如权利要求1至4中任一项所述的显示面板。
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