CN102608792B - 液晶显示器以及其驱动方法 - Google Patents

液晶显示器以及其驱动方法 Download PDF

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CN102608792B
CN102608792B CN201210089834.5A CN201210089834A CN102608792B CN 102608792 B CN102608792 B CN 102608792B CN 201210089834 A CN201210089834 A CN 201210089834A CN 102608792 B CN102608792 B CN 102608792B
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pixel electrode
signal
voltage
liquid crystal
crystal display
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CN102608792A (zh
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侯鸿龙
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US13/511,656 priority patent/US9202427B2/en
Priority to PCT/CN2012/073694 priority patent/WO2013143166A1/zh
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    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • 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
    • G02F1/1362—Active matrix addressed 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
    • G09G3/20—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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/356—Image reproducers having separate monoscopic and stereoscopic modes
    • H04N13/359—Switching between monoscopic and stereoscopic modes
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133776—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers having structures locally influencing the alignment, e.g. unevenness
    • G—PHYSICS
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active 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
    • 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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix

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Abstract

本发明提供一种液晶显示器，包括多个像素单元及影像切换器，该多个像素单元用来于接收多个二维影像信号或多个三维影像信号时，显示二维影像或三维影像，该影像切换器用来于接收二维/三维影像启动信号时，输出该二维/三维影像信号。每一像素单元包含第一像素电极，用来对应于该二维影像启动信号或是该三维影像启动信号时，接收第一电压信号。第二像素电极用来对应于该二维影像启动信号时，接收该第一电压信号，或是用来对应于该三维影像启动信号时，接收第二电压信号；第三像素电极用来接收该二维影像信号或该三维影像信号。该第一像素电极、该第二像素电极及该第三像素电极位于同一基板上且彼此不互相连接。

Description

液晶显示器以及其驱动方法
技术领域
本发明涉及一种平面转换式(In plane switching，IPS)液晶显示器以及其驱动方法，特别是涉及一种可减少像素之间的串扰且不会降低显示器的二维显示画质的液晶显示器及其驱动方法。
背景技术
人类是透过双眼所看到的展望而感知到真实世界的影像。而人类的大脑会进一步根据双眼所看到两个不同角度的展望之间的空间距离差异而形成所谓的三维(3-dimension，3D)影像。这种空间距离差异被称为视差(parallax)。所谓的3D显示设备就是模拟人类双眼不同角度的视野，让左、右眼分别接收到有视差的两个2D影像，使人脑获取左、右眼看到的不同2D影像后，能感知为3D影像。
传统的3D显示设备为狭缝光栅式立体显示设备。狭缝光栅式3D显示设备的原理是依靠不透光的视差屏障(parallax barrier)让使用者的左右眼看到具有视差之影像，而此视差就会在大脑中形成立体感。但是狭缝光栅式3D显示设备的设计中存在着视角范围有限的缺点。原本左眼通过垂直偏光镜只能看到的左眼信号，但是过大的视角有可能看到右眼信号，相对地，原本右眼通过水平偏光镜只能看到右眼信号，但是过大的视角有可能看到左眼信号。上述现象导致看到的3D影像有所谓串扰现象（crosstalk）的问题。
故，有必要提供一种液晶显示器，以解决现有技术所存在的问题
发明内容
本发明的目的在于提供一种液晶显示器，以解决现有技术的液晶显示器在观看3D图像时易产生串扰现象的问题。
本发明提供一种液晶显示器，包括一基板、多个像素单元以及一处理单元，所述多个像素单元位于所述基板上，用来于接收多个二维影像信号或多个三维影像信号时，显示二维影像或三维影像，所述处理单元用来于接收一二维影像启动信号时，输出所述二维影像信号，或是于接收一三维影像启动信号时，输出所述三维影像信号。每一像素单元包含：一晶体管，用来于接收一扫描信号时，导通所述二维影像信号或所述三维影像信号；一第一像素电极，用来对应于所述二维影像启动信号或是所述三维影像启动信号时，接收一第一电压信号；一第二像素电极，用来对应于所述二维影像启动信号时，接收所述第一电压信号，或是用来对应于所述三维影像启动信号时，接收一第二电压信号，所述第一电压信号不同于所述第二电压信号；及一第三像素电极，电性连接所述晶体管，用来接收依据所述二维影像信号或所述三维影像所产生的灰度信号。所述第一像素电极、所述第二像素电极及所述第三像素电极位于所述基板上且彼此不互相连接。
根据本发明，所述第一电压信号是直流电压。所述第二电压信号是交流电压。
根据本发明，所述液晶显示器另包含一电压产生器，电性连接所述处理单元，用来于接收所述二维影像启动信号时，输出所述第一电压信号予所述第一像素电极和所述第二像素电极，并用来于接收所述三维影像启动信号时，输出所述第一电压信号予所述第一像素电极且输出所述第二电压信号予所述第二像素电极。
根据本发明，所述液晶显示器另包含一第一共电压线，电性连接所述电压产生器及所述第一像素电极，用来传送所述电压产生器输出的所述第一电压信号予所述第一像素电极；及一第二共电压线，电性连接所述电压产生器及所述第二像素电极，用来传送所述电压产生器输出的所述第二电压信号予所述第二像素电极。
根据本发明，所述第一共电压线，电性连接所述电压产生器及所述第一像素电极，用来传送所述电压产生器输出的所述第一电压信号予所述第一像素电极，所述第一像素电极和所述第二像素电极分别位于所述第一共电压线的两侧；所述第二共电压线电性连接所述电压产生器及所述第二像素电极，用来传送所述电压产生器输出的所述第二电压信号予所述第二像素电极，所述第二像素电极位于所述第一共电压线以及所述第二共电压线之间。
根据本发明，所述第二电压信号的工作频率等于所述液晶显示器的画面更新频率。
本发明另提供一种驱动液晶显示器的方法，所述液晶显示器包括多个像素单元，每一像素单元包括一第一像素电极、一第二像素电极及一第三像素电极，所述第三像素电极和所述第一像素电极形成一第一像素区，所述第三像素电极和所述第二像素电极形成一第二像素区，所述第一像素电极、所述第二像素电极及所述第三像素电极位于同一平面且彼此不互相连接，所述方法包含：当接收一二维影像启动信号时，输出一二维影像信号；对应于所述二维影像启动信号时，所述第三像素电极接收依据所述二维影像信号所产生的灰度信号，所述第一像素电极和所述第二像素电极接收一第一电压信号；当接收一三维影像启动信号时，输出一三维影像信号；对应于所述三维影像启动信号时，所述第三像素电极接收依据所述三维影像信号所产生的灰度信号，所述第一像素电极接收所述第一电压信号，所述第二像素电极接收一第二电压信号，使得所述第二像素区的亮度小于所述第一像素区，所述第一电压信号不同于所述第二电压信号。
根据本发明，所述第一电压信号是直流电压，所述第二电压信号是交流电压。
根据本发明，所述第二电压信号的工作频率等于所述液晶显示器的画面更新频率。
相较于现有技术，本发明液晶显示器的每一像素单元包含第一像素电极、第二像素电极和第三像素电极。所述第一像素电极用来对应于该二维影像启动信号或是该三维影像启动信号时，接收第一电压信号。所述第二像素电极用来对应于该二维影像启动信号时，接收该第一电压信号，或是用来对应于该三维影像启动信号时，接收第二电压信号。所述第三像素电极用来接收该二维影像信号或该三维影像信号。该第一像素电极、该第二像素电极及该第三像素电极位于同一平面且彼此不互相连接。由于第一像素电极和第二像素电极在该第三像素电极接收二维影像信号时，都是接收相同的直流第一电压信号，因此该第一像素电极和该第三像素电极之间的电压差，与该第二像素电极和该第三像素电极之间的电压差是相同的，使得每一像素单元在显示二维影像时不会有亮度较弱的问题。相对地，在该第三像素电极接收三维影像信号时，该第一像素电极仍接收相同的直流第一电压信号，但是该第二像素电极则是接收交流的第二电压信号，且该第二电压信号的工作频率等于该液晶显示器的画面更新频率。此时，该第二像素电极和该第三像素电极之间的电压差是小于该第一像素电极和该第三像素电极之间的电压差，使得该第二像素电极和该第三像素电极之间的第二像素区的亮度小于该第一像素电极和该第三像素电极之间的第一像素区的亮度。通过本发明液晶显示器的像素单元结构和驱动方式，在显示三维影像时，每一像素单元的第二像素区的亮度相较于第一像素区的亮度小，所以可抑制串扰现象。在显示二维影像时，第一像素区和第二像素区的亮度相等，所以也不存在观看二维图像时亮度下降的问题。
为让本发明的上述内容能更明显易懂，下文特举优选实施例，并配合所附图式，作详细说明如下：
附图说明
图1是本发明的显示三维影像的液晶显示器的示意图。
图2绘示图1的像素单元。
图3是本发明驱动液晶显示器的方法流程图。
图4是本发明在显示3D影像时，第一电压信号Vcom、第二电压信号Vcom_s和灰度信号Vpixel的关系图。
具体实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
请参阅图1，图1是本发明的显示三维影像的液晶显示器100的示意图。使用者观看液晶显示器100时，可以切换观看2D或3D影像。液晶显示器100包含一处理单元102、数个数据驱动器106、数个扫描驱动器108、一时序控制器(timing controller)112、一电压产生器114、一输入接口116以及一液晶显示面板110。液晶显示面板110包含数个像素单元(pixel)130和一基板140。
处理单元102可以为个人计算机或是笔记本电脑的中央处理器，用来产生数帧二维或三维影像信号。输入接口116可以是用户所控制的输入设备，例如设置于液晶显示器100上的按键或是显示于液晶显示器100上的选单(menu)，可依据用户的输入指令选择产生二维/三维影像启动信号。处理单元102是电性连接于输入接口116，用来依据输入接口116所产生的二维/三维影像启动信号决定输出数帧二维或三维影像信号予时序控制器112。电压产生器114电性连接于输入接口116，用于接收二维/三维影像启动信号时，决定输出第一电压信号或是第二电压信号予第一共电极线141或是第二共电压线142(绘示于图2)。
时序控制器112电性连接处理单元102，用于依据二维或三维影像信号产生频率脉冲信号至扫描驱动器108，也会将其接收的二维或三维影像信号转换成二维或三维数据信号。扫描驱动器108用于根据频率脉冲信号输出扫描信号，数据驱动器106会将上述数据信号转换成不同电压准位的灰度信号。数据驱动器106以及扫描驱动器108设置于软性电路板(未图标)上(Chip on film，COF)，或是设置在基板140上(Chip of glass，COG)，然后再透过软性电路板电连接。
请一并参阅图1和图2，图2绘示图1的像素单元130。依据本发明的较佳实施例，液晶显示面板110是平面转换式(In planeswitching，IPS)液晶显示面板。每一像素单元130包含一晶体管138、一第一像素电极131、一第二像素电极132和一第三像素电极133。第一像素电极131、第二像素电极132及第三像素电极133彼此不互相连接。第一像素电极131电性连接于第一共电压线141。第二像素电极132电性连接于第二共电压线142。较佳地，第一像素电极131和第二像素电极132分别位于第一共电压线141的两侧，第二像素电极132位于第一共电压线141以及第二共电压线142之间。晶体管138的栅极、源极和漏极分别电性连接于扫描线SL、数据线DL及第三像素电极133。当时序控制器112产生的频率信号脉冲传送至扫描驱动器108时，扫描驱动器108会依序产生多个扫描信号经过扫描线SL传送至液晶显示面板110，使得液晶显示面板110每一行的像素单元130的晶体管138依序开启。在一行像素单元130的晶体管138开启的同时，数据驱动器106依据二维/三维影像信号产生对应的灰度信号，再通过数据线DL将产生之灰度信号传送至该行每一像素单元130的第三像素电极133。第一像素电极131与第二像素电极132分别电性连接第一共电压线141与第二共电压线142，用以接收电压产生器114产生的第一电压信号或是第二电压信号。位于第一像素电极131和第三像素电极133之间的液晶160是依据第一像素电极131和第三像素电极133之间的电压差所产生的电场而转动；位于第二像素电极132和第三像素电极133之间的液晶160则是依据第二像素电极132和第三像素电极133之间的电压差所产生的电场而转动。因为第一像素电极131、第二像素电极132和第三像素电极133都是位于相同的基板140上，所以每一像素单元130上的液晶160是受到第一像素电极131、第二像素电极132和第三像素电极133之间的平面电场影响而在一个平面上旋转，所以较没有方向性。液晶显示面板110的观察者在任何时候都只能看到液晶160的短轴，因此在各个角度上观看的画面都不会有太大差别，这样就扩大了液晶显示器100的视角，并有效改善灰度反转及色偏移的问题。在本实施例中，每一像素单元130分为第一像素区151和第二像素区152。第一像素区151是指受第一像素电极131和第三像素电极133之间电场影响的液晶160所涵盖的区域。第二像素区152是指受第二像素电极132和第三像素电极133之间电场影响的液晶160所涵盖的区域。
请参阅图1至图3，图3是本发明驱动液晶显示器的方法流程图。本驱动方法包含下列步骤：
步骤300：依据输入指令产生二维影像启动信号或三维影像启动信号。
步骤302：当接收二维影像启动信号时，输出二维影像信号。
步骤304：对应于所述二维影像启动信号时，所述第三像素电极接收依据所述二维影像信号所产生的灰度信号，所述第一像素电极和所述第二像素电极接收一第一电压信号。
步骤306：当接收三维影像启动信号时，输出三维影像信号。
步骤308：对应于所述三维影像启动信号时，所述第三像素电极接收依据所述三维影像信号所产生的灰度信号，所述第一像素电极接收所述第一电压信号，所述第二像素电极接收一第二电压信号，使得所述第二像素区的亮度小于所述第一像素区，所述第一电压信号不同于所述第二电压信号。
当输入接口116产生二维影像启动信号时，处理单元102会输出二维影像信号，而电压产生器114会通过第一共电压线141和第二共电压线142输出第一电压信号Vcom至第一像素电极131和第二像素电极132。该第一电压信号Vcom可以是直流电压信号。此时，数据驱动器106会根据该二维影像信号输出对应的灰度信号予像素单元130。而像素单元130的第三像素电极133则会通过晶体管138接收跟据该二维影像信号所产生的灰度信号。所以第三像素电极133和第一像素电极131之间电压差等于第三像素电极133和第二像素电极132之间电压差，使得第一像素区151和第二像素区152上的液晶160会有相同转动角度而呈现一致的亮度。
请参阅图4，图4是本发明在显示3D影像时，第一电压信号Vcom、第二电压信号Vcom_s和灰度信号Vpixel的关系图。当输入接口116产生三维影像启动信号时，处理单元102会输出三维影像信号，数据驱动器106会根据该三维影像信号输出对应的灰度信号Vpixel予像素单元130。同时电压产生器114会通过第一共电压线141输出第一电压信号Vcom至第一像素电极131，但是会通过第二共电压线142输出第二电压信号Vcom_s至第二像素电极132。该第一电压信号Vcom可以是直流电压信号。第二电压信号Vcom_s则是交流电压信号，第二电压信号Vcom_s的工作频率可以等于液晶显示器100的画面更新频率(frame rate)。举例来说，当液晶显示器100的画面更新频率是120Hz，第二电压信号Vcom_s的工作频率也是120Hz。当液晶显示器100是利用帧转换(frame inversion)的驱动方式时，施加于像素单元130的灰度信号Vpixel的正、负极性会每隔画面更新频率交替。正极性的灰度信号Vpixel表示该灰度信号Vpixel的电压值大于一固定电压值(例如第一电压信号Vcom)，相反地，负极性的灰度信号Vpixel表示该灰度信号Vpixel的电压值小于该固定电压值。因此，为配合帧转换的驱动方式，当该灰度信号Vpixel处于正极性时，第二电压信号Vcom_s的电压值会大于该固定电压值(例如第一电压信号Vcom)，当该灰度信号Vpixel处于负极性时，第二电压信号Vcom_s的电压值小于该固定电压值。
电压差越大会导致液晶160转动的角度越大，因此液晶160所对应像素区所呈现的亮度会越大。当本实施例在显示3D影像时，第三像素电极133接收灰度信号Vpixel和第二像素电极132接收的第二电压信号Vcom_s的电压差D1的绝对值，小于第三像素电极133接收灰度信号Vpixel和第一像素电极131接收的第一电压信号Vcom的电压差D2的绝对值，使得第一像素区151的亮度会大于第二像素区152的亮度。因此本发明在显示3D影像时，每一像素单元130会形成一个较亮的第一像素区151和一个较暗的第二像素区152。较暗的第二像素区152可以形成视觉上的遮蔽效果，使得来自邻接像素单元130的串扰现象得以改善。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (10)

1.一种液晶显示器，包括一基板、多个像素单元以及一处理单元，所述多个像素单元位于所述基板上，用来于接收多个二维影像信号或多个三维影像信号时，显示二维影像或三维影像，所述处理单元用来于接收一二维影像启动信号时，输出所述二维影像信号，或是于接收一三维影像启动信号时，输出所述三维影像信号，其特征在于，每一像素单元包含：
一晶体管，用来于接收一扫描信号时，导通依据所述二维影像信号或所述三维影像信号产生的灰度信号；
一第一像素电极，用来对应于所述二维影像启动信号或是所述三维影像启动信号时，接收一第一电压信号；
一第二像素电极，用来对应于所述二维影像启动信号时，接收所述第一电压信号，或是用来对应于所述三维影像启动信号时，接收一第二电压信号，所述第一电压信号不同于所述第二电压信号；及
一第三像素电极，电性连接所述晶体管，用来接收依据所述二维影像信号或所述三维影像信号所产生的灰度信号，
其中所述第一像素电极、所述第二像素电极及所述第三像素电极位于所述基板上且彼此不互相连接。
2.根据权利要求1所述的液晶显示器，其特征在于，所述第一电压信号是直流电压。
3.根据权利要求1所述的液晶显示器，其特征在于，所述第二电压信号是交流电压。
4.根据权利要求1所述的液晶显示器，其特征在于，所述液晶显示器另包含一电压产生器，用来于接收所述二维影像启动信号时，输出所述第一电压信号予所述第一像素电极和所述第二像素电极，并用来于接收所述三维影像启动信号时，输出所述第一电压信号予所述第一像素电极且输出所述第二电压信号予所述第二像素电极。
5.根据权利要求4所述的液晶显示器，其特征在于，另包含：一第一共电压线，电性连接所述电压产生器及所述第一像素电极，用来传送所述电压产生器输出的所述第一电压信号予所述第一像素电极；及
一第二共电压线，电性连接所述电压产生器及所述第二像素电极，用来传送所述电压产生器输出的所述第二电压信号予所述第二像素电极。
6.根据权利要求5所述的液晶显示器，其特征在于，所述第一共电压线，电性连接所述电压产生器及所述第一像素电极，用来传送所述电压产生器输出的所述第一电压信号予所述第一像素电极，所述第一像素电极和所述第二像素电极分别位于所述第一共电压线的两侧；所述第二共电压线电性连接所述电压产生器及所述第二像素电极，用来传送所述电压产生器输出的所述第二电压信号予所述第二像素电极，所述第二像素电极位于所述第一共电压线以及所述第二共电压线之间。
7.根据权利要求1所述的液晶显示器，其特征在于，所述第二电压信号的工作频率等于所述液晶显示器的画面更新频率。
8.一种驱动液晶显示器的方法，所述液晶显示器包括多个像素单元，每一像素单元包括一第一像素电极、一第二像素电极及一第三像素电极，所述第三像素电极和所述第一像素电极形成一第一像素区，所述第三像素电极和所述第二像素电极形成一第二像素区，所述第一像素电极、所述第二像素电极及所述第三像素电极位于同一平面且彼此不互相连接，所述方法包含：
当接收一二维影像启动信号时，输出一二维影像信号；
对应于所述二维影像启动信号时，所述第三像素电极接收依据所述二维影像信号所产生的灰度信号，所述第一像素电极和所述第二像素电极接收一第一电压信号；
当接收一三维影像启动信号时，输出一三维影像信号；
对应于所述三维影像启动信号时，所述第三像素电极接收依据所述三维影像信号所产生的灰度信号，所述第一像素电极接收所述第一电压信号，所述第二像素电极接收一第二电压信号，使得所述第二像素区的亮度小于所述第一像素区，所述第一电压信号不同于所述第二电压信号。
9.根据权利要求8所述驱动液晶显示器的方法，其特征在于，所述第一电压信号是直流电压，所述第二电压信号是交流电压。
10.根据权利要求8所述驱动液晶显示器的方法，其特征在于，所述第二电压信号的工作频率等于所述液晶显示器的画面更新频率。
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