CN110648637A - 显示装置和显示控制器 - Google Patents

显示装置和显示控制器 Download PDF

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CN110648637A
CN110648637A CN201910535919.3A CN201910535919A CN110648637A CN 110648637 A CN110648637 A CN 110648637A CN 201910535919 A CN201910535919 A CN 201910535919A CN 110648637 A CN110648637 A CN 110648637A
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data
display
signal
scan
driver
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CN201910535919.3A
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CN110648637B (zh
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樋口钢儿
原山国广
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Lapis Semiconductor Co Ltd
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Lapis Semiconductor Co Ltd
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • 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
    • G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
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    • 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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    • 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
    • G09G3/3258—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 with pixel circuitry controlling the voltage across the light-emitting element
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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Power Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of El Displays (AREA)
  • Liquid Crystal (AREA)

Abstract

本发明涉及显示装置和显示控制器。提供能够进行抑制了亮度不均的显示的显示装置。具有：显示面板、将扫描信号向第1~第n扫描线供给的栅极驱动器、将与视频数据信号对应的灰度电压信号向多个数据线供给的数据驱动器、以及将视频数据信号向数据驱动器供给的显示控制器。显示控制器将第1~第n显示数据按由第k显示数据和第（n+1‑k）显示数据构成的显示数据对的每一个以规定的顺序向数据驱动器供给。栅极驱动器以与规定的顺序对应的顺序向多个扫描线供给具有根据从数据驱动器到第1~第n扫描线的各个的距离而不同的脉冲宽度的扫描信号。数据驱动器根据来自显示控制器的显示数据对的供给将灰度电压信号向多个数据线供给。

Description

显示装置和显示控制器
技术领域
本发明涉及显示装置、显示控制器、栅极驱动器和数据驱动器。
背景技术
作为液晶显示装置或有机EL（Electro Luminescence，电致发光）等显示设备的驱动方式，采用有源矩阵驱动方式。在有源矩阵驱动方式的显示装置中，显示面板由将像素部和像素开关呈矩阵状配置后的半导体基板构成。通过扫描信号来控制像素开关的接通关断，在像素开关为接通时将与视频数据信号对应的灰度电压信号向像素部供给，控制各像素部的亮度，由此，进行显示。扫描信号被栅极驱动器供给到扫描线，利用数据驱动器经由数据线进行灰度电压信号的供给。
在有源矩阵驱动方式的液晶显示装置中，提出了为了消除由制造偏差造成的扫描线的电容或液晶电容等各种特性的误差所对应的显示图像的混乱而设置对表示将像素开关接通关断的定时的信息进行保持的保持单元而能够在装置的制造后进行定时的指定的液晶显示装置（例如，专利文献1）。
现有技术文献
专利文献
专利文献1：日本特开平8-95000号公报。
发明要解决的课题
作为在TV或监视器中使用的显示装置，4K面板或8K面板等高分辨率且大画面的显示装置的需要变高。伴随着显示面板的大画面化和高分辨率化，从栅极驱动器输出的扫描信号的选择期间（扫描信号的脉冲宽度）变短。另一方面，数据驱动器必须驱动的显示面板的数据线的负载电容增加，数据驱动器驱动的每1个像素的驱动期间（向数据线供给灰度电压信号的数据期间）也与扫描信号的选择期间对应地变短。
当数据线的负载电容较大且驱动期间变短时，来自数据驱动器的输出电路的输出信号是在靠近输出电路的数据线上的位置（以下，称为数据线近端）输出信号几乎没有信号波形的上升沿的失真的信号，但是，朝向远离输出电路的数据线上的位置（以下，称为数据线远端），失真增大，向像素电极的写入率（像素电极向目标电压的到达率）降低。
具体而言，在数据线近端，数据线的阻抗的影响较小而灰度电压信号的信号波形的上升沿的失真较小，因此，能够将供给的灰度电压信号的电压电平直接写入到像素电极中。相对于此，在数据线远端，受到数据线的阻抗的影响而信号波形的上升沿较大地失真，在1数据期间内不能到达供给的灰度电压电平，不足供给的灰度电压信号的电压电平的电压电平被写入到像素电极中。因此，存在在显示面板内发生针对同一灰度的亮度差而产生亮度不均等画质劣化这样的问题。
发明内容
本发明是鉴于上述问题点而完成的，其目的在于提供能够进行抑制了亮度不均的显示的显示装置。
用于解决课题的方案
本发明的显示装置的特征在于，具有：显示面板，有多个数据线、第1~第n扫描线、和在所述多个数据线与所述第1~第n扫描线的交叉部的各个设置的像素开关及像素部，其中，n为2以上的偶数；栅极驱动器，向所述第1~第n扫描线供给在与脉冲宽度对应的选择期间将所述像素开关控制为接通的扫描信号；数据驱动器，接收由第1~第n扫描线的各个所对应的第1~第n显示数据构成的1帧的量的视频数据信号，将与所述视频数据信号对应的灰度电压信号向所述多个数据线供给；以及显示控制器，将所述视频数据信号向所述数据驱动器供给，所述显示控制器将所述第1~第n显示数据按由第k显示数据和第（n+1-k）显示数据构成的显示数据对的每一个以规定的顺序向所述数据驱动器供给，其中，k为1~（1/2）n的整数，所述栅极驱动器以与所述规定的顺序对应的顺序向所述多个扫描线供给具有脉冲宽度的所述扫描信号，所述脉冲宽度根据从所述数据驱动器到所述第1~第n扫描线的各个的距离而不同，所述数据驱动器根据来自所述显示控制器的所述显示数据对的供给将所述灰度电压信号向所述多个数据线供给。
本发明的显示控制器的特征在于，将由第1~第n显示数据构成的1帧的量的视频数据信号按由第k显示数据和第（n+1-k）显示数据构成的显示数据对的每一个以规定的顺序向所述数据驱动器供给。
本发明的栅极驱动器是，一种栅极驱动器，连接于具有多个数据线、第1~第n扫描线、和在所述多个数据线与所述多个扫描线第1~第n扫描线的交叉部的各个设置的像素开关及像素部的、显示面板，并且，向所述第1~第n扫描线供给在与脉冲宽度对应的选择期间将所述像素开关控制为接通的扫描信号，其中，n为2以上的偶数，所述栅极驱动器的特征在于，按由第k扫描线和第（n+1-k）扫描线构成的扫描线对的每一个以规定的顺序向所述多个扫描线供给具有脉冲宽度的所述扫描信号，所述脉冲宽度根据从所述数据驱动器到所述第1~第n扫描线的各个的距离而不同。
本发明的数据驱动器是，一种数据驱动器，连接于具有多个数据线、第1~第n扫描线、和在所述多个数据线与所述多个扫描线第1~第n扫描线的交叉部的各个设置的像素开关及像素部的、显示面板，并且，将与视频数据信号对应的灰度电压信号向所述多个数据线供给，其中，n为2以上的偶数，所述数据驱动器的特征在于，接收由第1~第n显示数据构成的1帧的量的视频数据信号的输入，将第1~第n显示数据按由第k显示数据和第（n+1-k）显示数据构成的显示数据对的每一个以规定的顺序向所述多个数据线供给与所述显示数据对应的灰度电压信号。
发明效果
根据本发明的显示装置，能够抑制在显示面板面内的亮度不均并进行显示。
附图说明
图1是示出实施例1的显示装置的结构的框图。
图2是示意性地示出显示控制器向数据驱动器供给的显示数据的序列的图。
图3A是示出数据驱动器具有的锁存电路的结构的电路图。
图3B是示出移位时钟信号和锁存信号的图。
图4是示出1帧期间中的时钟信号、调制时钟信号、扫描信号和向某个数据线供给的灰度电压信号的时间图。
图5是示出与本实施例的显示装置不同的比较例的显示装置中的各信号的时间图。
图6是示出数据线上的位置与灰度电压信号的最大振幅振动时的1数据期间内的像素部的充电率的关系的图。
图7A是示出实施例2中的扫描信号的供给和扫描线的预充电的时间图。
图7B是示出比较例中的扫描信号的供给和扫描线的预充电的时间图。
具体实施方式
以下，参照附图来对本发明的实施例进行说明。再有，在以下的实施例中的说明和附图中，对实质上相同或等效的部分标注相同的参照附图标记。
【实施例1】
图1是示出本实施例的显示装置100的结构的框图。显示装置100是例如有源矩阵驱动方式的液晶显示装置，包括显示面板11、显示控制器（T-con）12、数据驱动器13和栅极驱动器14。
显示面板11由将多个像素部P11~Pnm和像素开关M11~Mnm（n为2以上的偶数、m为2以上的自然数）呈矩阵状地配置后的半导体基板构成。显示面板11具有n个扫描线S1~Sn和以与其交叉的方式配置的m个数据线D1~Dm。像素部P11~Pnm和像素开关M11~Mnm被设置于扫描线S1~Sn和数据线D1~Dm的交叉部。
根据从栅极驱动器14供给的扫描信号Vg1~Vgn将像素开关M11~Mnm控制为接通或关断。
像素部P11~Pnm在像素开关M11~Mnm接通时从数据驱动器13接收灰度电压信号Gv1~Gvm的供给。灰度电压信号Gv1~Gvm是与视频数据信号VD对应的信号。根据灰度电压信号Gv1~Gvm控制像素部P11~Pnm的亮度，进行显示。
在显示装置100是液晶显示装置的情况下，像素部P11~Pnm的各个包括未图示的透明电极、和与半导体基板相向地设置且在与在面整体形成1个透明的电极后的相向基板之间封入的液晶。针对显示装置内部的背光，液晶的透射率根据向像素部P11~Pnm供给的灰度电压信号Gv1~Gvm与相向基板电压的电位差而发生变化，由此，进行显示。
显示控制器12包括对1帧的量的输入视频信号VS进行保持的1帧存储器15A。显示控制器12从1帧的量的输入视频信号VS提取表示S1~Sn的各扫描线上的像素的亮度电平的、第1~第n显示数据PD，生成包括显示数据PD的序列的、视频数据信号VD，并将其向数据驱动器13供给。
显示控制器12将靠近数据驱动器13的扫描线的1个和远离数据驱动器13的扫描线的1个组合，以与该组合所涉及的扫描线对应的显示数据PD（即，供给到扫描线上的像素部的、显示数据PD）彼此连续的方式构成显示数据的顺序，将其作为视频数据信号VD向数据驱动器13供给。具体而言，显示控制器12按由与扫描线Sk对应的第k显示数据和与扫描线S（n+1-k）对应的第（n+1-k）显示数据构成的显示数据对（k为1~（1/2）n的整数）的每一个将显示数据PD向数据驱动器13供给。
图2是示出显示控制器12向数据驱动器13供给的显示数据PD的序列（即，视频数据信号VD）的结构的图。显示数据PD由包括起动脉冲（start pulse）或配置数据等的开销OH、实际数据（actual data）和虚拟数据（dummy data）DD构成。将与扫描线S1对应的第1显示数据PD和与扫描线Sn对应的第n显示数据PD组合，做成2个水平扫描线的量的显示数据。同样地，显示控制器12如与扫描线S2对应的第2显示数据PD和与扫描线Sn-1对应的第n-1显示数据PD、与扫描线S3对应的第3显示数据PD和与Sn-2对应的第n-2显示数据PD、…那样将离数据驱动器13的距离较近的扫描线和较远的扫描线所对应的显示数据PD组合，使与各组的2个扫描线对应的显示数据PD分别做成2个水平扫描线的量的显示数据。由此，在视频数据信号VD中按扫描线S1、Sn、S2、Sn-1、S3…的顺序排列与各扫描线对应的显示数据PD。
此外，显示控制器12生成时钟脉冲间的期间（以下，称为时钟期间）根据从数据驱动器13到与各显示数据PD对应的扫描线（即，作为各显示数据PD的供给目的地的扫描线）的距离而不同那样的输出时钟信号OCLK来作为示出将各显示数据PD向数据驱动器13供给的定时的信号。然后，显示控制器12根据输出时钟信号OCLK的时钟定时将显示数据PD（即，视频数据信号VD）向数据驱动器13供给。
如图2所示那样，示出与扫描线S1对应的显示数据PD的供给定时的、时钟期间SCP1比示出与扫描线Sn对应的显示数据PD的供给定时的、时钟期间SCPn短。时钟期间的长度根据从数据驱动器13到与各显示数据PD对应的扫描线的距离而不同，因此，为SCP1＜SCP2＜SCP3…＜SCPn-1＜SCPn。此外，将时钟期间CP1和时钟期间SCPn相加后的期间的长度与将时钟期间SCP2和时钟期间SCPn-1（未图示）相加后的期间的长度相等。即，为SCP1+SCPn=SCP2+SCPn-1=SCP3+SCPn-2=…。
当再次参照图1时，显示控制器12将控制信号CS向数据驱动器13和栅极驱动器14供给。此外，显示控制器12接收时钟信号CLK的供给，基于时钟信号CLK来生成由栅极驱动器14进行的确定扫描信号的脉冲宽度的、调制时钟信号MCLK，并将其向栅极驱动器14供给。
数据驱动器13从显示控制器12接收由显示数据PD的序列构成的视频数据信号VD的供给，经由数据线D1~Dm将与显示数据PD对应的灰度电压信号Gv1~Gvm向像素部P11~Pnm供给。数据驱动器13将与灰度数对应的多值电平的灰度电压信号Gv1~Gvm向数据线D1~Dm供给。
图3A是示出数据驱动器13具有的锁存电路131的结构的电路图。锁存电路131由第1锁存部L1、第2锁存部L2和第3锁存部L3构成。数据驱动器13具有m个信道的量的同样的锁存电路131。
图3B示出了对锁存电路131的锁存工作的定时进行控制的移位时钟信号SCLK、锁存信号WR2_N、WR2_F、WR3_N和WR3_F。移位时钟信号SCLK具有：示出供给到靠近数据驱动器13的扫描线的显示数据PD的导入定时的、时钟脉冲CP1a、CP2a、…、以及示出供给到远离数据驱动器13的扫描线的显示数据PD的导入定时的、时钟脉冲CP1b、CP2b、…。
锁存信号WR2_N是将移位时钟信号SCLK的时钟脉冲CP1a、CP2a、…移位后的信号。锁存信号WR2_F是将移位时钟信号SCLK的时钟脉冲CP1b、CP2b、…移位后的信号。锁存信号WR3_N和WR3_F是分别将锁存信号WR2_N和WR2_F移位后的信号。
当再次参照图3A时，第1锁存部L1包括反相器IV11和IV12、以及传输门T11和T12。1位的量的显示数据PD根据移位时钟SCLK而被导入到第1锁存部L1中。第1锁存部L1具有依次存下数据的功能。
第2锁存部L2包括由反相器IV21a、IV22a、传输门T21a和T22a构成的近端侧锁存部、以及由反相器IV21b、IV22b、传输门T21b和T22b构成的远端侧锁存部。在近端侧锁存部中，根据锁存信号WR2_N导入显示数据PD之中的靠近数据驱动器13侧（以下，称为数据线近端）的扫描线所对应的数据。在远端侧锁存部中，根据锁存信号WR2_F导入显示数据PD之中的远离数据驱动器13侧（以下，称为数据线远端）的扫描线所对应的数据。第2锁存部L2具有使数据确定的功能。
第3锁存部L3包括反相器IV31和IV32、以及传输门T31a、T31b和T32。根据锁存信号WR3_N向第3锁存部L3导入与数据线近端的扫描线对应的数据，根据锁存信号WR3_F向第3锁存部L3导入与数据线远端的扫描线对应的数据。将导入的近端侧的数据和远端侧的数据交替地向DC转换器等下一级的电路输出。第3锁存部L3具有对数据的输出定时进行控制的功能。
根据这样的结构，数据驱动器13具有的锁存电路131能够存下按每2个水平扫描线的量的显示数据PD从显示控制器11传输的数据，并按各1个水平扫描线输出数据。
当再次参照图1时，栅极驱动器14从显示控制器12接收调制时钟信号MCLK和控制信号CS的供给，与其对应地将扫描信号Vg1~Vgn向扫描线S1~Sn供给。栅极驱动器14将至少2值的扫描信号Vg1~Vgn向扫描线S1~Sn供给。
基于调制时钟信号MCLK以与数据线近端的扫描线对应的扫描信号的脉冲宽度变短且与数据线远端的扫描线对应的扫描信号的脉冲宽度变长的方式生成扫描信号Vg1~Vgn。即，扫描信号Vg1~Vgn的各自的脉冲宽度为Vg1＜Vg2＜Vg3…＜Vgn。扫描信号Vg1~Vgn的脉冲宽度为像素开关M11~Mnm的选择期间。
此外，栅极驱动器14交替地进行针对数据线近端的扫描线的扫描信号的供给和针对数据线远端的扫描线的扫描信号的供给。具体而言，栅极驱动器14按扫描线S1、Sn、S2、Sn-1、S3、Sn-2…的次序供给与各扫描线对应的扫描信号Vg1~Vgn。
按每1帧期间进行1个画面的量的视频数据信号的改写，按与扫描线S1~Sn对应的每个像素行选择像素部P11~Pnm，经由数据线D1~Dm将灰度电压信号Gv1~Gvm向像素部P11~Pnm供给。在以下的说明中，将向像素部P11~Pnm的灰度电压信号Gv1~Gvm的供给也称为“灰度电压信号向像素电极的写入”。
图4是示出本实施例的显示装置100的1帧期间TF中的时钟信号CLK、调制时钟信号MCLK、扫描信号Vg1~Vgn和供给到某个数据线Dx的灰度电压信号Gvx的时间图。
在显示控制器12中通过计数规定数的时钟信号CLK的时钟脉冲而生成调制时钟信号MCLK。关于调制时钟信号MCLK，在1帧期间TF的开始稍后脉冲宽度较短，时钟脉冲的间隔较长。然后，调制时钟信号MCLK变化为随着朝向1帧期间TF的后半而脉冲宽度变长且时钟脉冲的间隔变短。
另一方面，关于使调制时钟信号MCLK反转后的反转调制时钟信号IMCLK，在1帧期间TF的开始稍后脉冲宽度较长，时钟脉冲的间隔较短。然后，反转调制时钟信号IMCLK变化为随着朝向1帧期间TF的后半而脉冲宽度变短且时钟脉冲的间隔变长。
调制时钟信号MCLK的脉冲宽度为数据线近端的扫描信号Vg1、Vg2、Vg3…的脉冲宽度。因此，在数据线近端，扫描信号Vg1~Vgn的选择期间和灰度电压信号Gv1~Gvm的1数据期间变短。
反转调制时钟信号IMCLK的脉冲宽度为数据线远端的扫描信号Vgn、Vgn-1、Vgn-2…的脉冲宽度。因此，在数据线远端，扫描信号Vg1~Vgn的选择期间和灰度电压信号Gv1~Gvm的1数据期间变长。
栅极驱动器14按从显示面板11靠近数据驱动器13侧起第1个扫描线S1、第n个扫描线Sn、第2个扫描线S2、第n-1个扫描线Sn、…的次序供给扫描信号Vg1~Vgn。由此，在1帧期间内以靠近数据驱动器13侧的扫描线S1、远离数据驱动器13侧的扫描线Sn、靠近数据驱动器13侧的扫描线S2、远离数据驱动器13侧的扫描线Sn-1、…交替地进行根据扫描信号Vg1~Vgn的像素开关M11~Mnm的选择。
即，像素开关M11~Mnm以靠近数据驱动器13侧的像素行（第1行）、远离数据驱动器13侧的像素行（第n行）、靠近数据驱动器13侧的像素行（第2行）、远离数据驱动器13侧的像素行（第n-1行）交替地依次接通，从数据驱动器13供给到数据线D1~Dm的各个的灰度电压信号Gv1~Gvm以像素行为单位被依次写入到各像素电极中。
图4所示的灰度电压信号Gvx（S1）和Gvx（Sn）表示在数据线D1~Dm之中的某个数据线Dx中与各扫描信号Vg1~Vgn的选择期间对应的灰度电压信号Gvx的波形（实线）。再有，灰度电压信号Gvx是与灰度电平对应的多值电平的电压信号，但是，为了便于说明，在此示出了振幅最大的波形图案即在选择期间电压电平最大的波形。此外，以虚线示出了灰度电压信号的理想脉冲波形。在各扫描信号Vg1~Vgn的选择期间与灰度电压信号Gvx（S1）和Gvx（Sn）的数据期间之间设置有规定的定时差dh。
灰度电压信号Gvx经由数据线D1~Dm被写入到各像素电极中。因此，灰度电压信号Gvx受到数据线阻抗的影响而在信号波形的上升沿产生失真。特别地，在数据线远端，与数据线近端相比，数据线的阻抗的影响较大，灰度电压信号的信号波形的上升沿的失真较大。
图5是作为比较例示出与本实施例的显示装置100不同、基于在1帧期间TF内具有固定的脉冲宽度和脉冲间隔的时钟信号CLK来进行工作的标准的显示装置中的各信号的、时间图。
1帧期间TF的开始稍后的由扫描信号Vg1、Vg2选择的灰度电压信号Gvx是在靠近数据驱动器侧（以下，称为数据线近端）的灰度电压信号，数据线阻抗的影响较小，因此，灰度电压信号Gvx的信号波形的上升沿的失真较小，能够将供给的灰度电压信号Gvx的电压电平直接写入到像素电极中。此外，1帧期间TF的中间附近的由扫描信号Vgk选择的灰度电压信号Gvx是在数据线中间的灰度电压信号，因此，受到数据线阻抗的影响而波形（信号电平的上升程度）失真，但是，在选择期间Th的后半到达从数据驱动器供给的灰度电压信号Gvx的电压电平，能够将该电压电平写入到像素电极中。
另一方面，帧期间TF的结束跟前的由扫描信号Vgn选择的灰度电压信号Gvx是在远离数据驱动器侧（以下，称为数据线远端）的灰度电压信号，因此，较大地受到数据线阻抗的影响而信号波形的上升沿的失真变大，不能在1数据期间内到达供给的灰度电压电平，不足供给的灰度电压信号Gvx的电压电平的电压电平被写入到像素电极中。因此，在数据线远端附近，产生针对像素电极的写入不足，在显示面板中产生亮度差。
当再次参照图4时，在本实施例的显示装置100中，与数据线近端的扫描线对应的扫描信号Vg1的选择期间和灰度电压信号Gvx（S1）的1数据期间（示出为Th1）被设定为与图5的比较例中的标准的1数据期间Th相比比较短的期间。可是，关于在数据线近端的灰度电压信号Gvx，数据线阻抗的影响较小，信号波形的上升沿的失真较小。因此，即使1数据期间Th1变短，也能够将供给的灰度电压信号Gvx的电压电平直接写入到像素电极中。
另一方面，与数据线远端的扫描线对应的扫描信号Vgn的选择期间和灰度电压信号Gvx（Sn）的1数据期间（示出为Thn）被设定为与图5的比较例中的标准的1数据期间Th相比比较长的期间。由扫描信号Vgn选择的灰度电压信号Gvx（Sn）是在数据线远端的灰度电压信号，因此，较大地受到数据线阻抗的影响而波形较大地失真。然而，由于1数据期间Thn变长，所以，能够在1数据期间Thn内到达从数据驱动器13供给的灰度电压信号Gvx的电压电平，能够将该电压电平写入到像素电极中。
如以上那样，在本实施例的显示装置100中，栅极驱动器14对离数据驱动器13的距离较近的扫描线（S1、S2…）供给脉冲宽度较短的扫描信号（Vg1、Vg2…），对离数据驱动器13的距离较远的扫描线（Sn、Sn-1…）供给脉冲宽度较长的扫描信号（Vgn、Vgn-1…）。由此，在远离数据驱动器13侧的像素部中，选择期间和数据期间扩大。因此，即使在灰度电压信号Gv1~Gvm的波形（信号电平的上升程度）由于数据线阻抗的影响而失真的情况下，向像素电极的写入电压也到达期望的电平（从数据驱动器13供给的灰度电压的电压电平）。
图6是示出数据线上的位置与灰度电压信号Gvx的最大振幅振动时的1数据期间内的像素部的充电率的关系的图。在如比较例（图5）那样灰度电压信号Gvx的1数据期间的长度不论离数据驱动器的距离而为固定的情况下，如在图6中由虚线（A）示出那样，在数据线远端的像素部中，由于灰度电压信号Gvx的失真，充电率降低。相对于此，在如本实施例（图4）那样使灰度电压Gvx的1数据期间为与离数据驱动器的距离对应的长度的情况下，如在图6中由实线（B）示出那样，数据线近端的像素部的充电率被降低，并且，数据线远端的像素部的充电率被提高，能够缩小数据线近端与远端之间的像素部的充电率的差。由此，能够改善由于像素部的充电率的差而产生的面板内的亮度不均而实现高品质的画质。
此外，在如上述那样针对数据线近端的扫描线而使扫描信号的脉冲宽度变窄且使像素开关的选择期间变短的情况下，将与数据线近端的扫描线上的像素对应的像素数据读入到数据驱动器中的时间也变短。因此，通常，在显示控制器与数据驱动器之间的接口需要高速传输，功耗也变大。
关于此方面，在本实施例的显示装置100中，栅极驱动器14以从扫描线S1~Sn的外侧（显示面板11的外缘部）朝向内侧（显示面板11的中央部）的方式对靠近数据驱动器13的扫描线和远离数据驱动器13的扫描线交替地供给扫描信号Vg1~Vgn。然后，显示控制器12与扫描信号Vg1~Vgn的供给的次序对应地将按扫描线S1、Sn、S2、Sn-1、S3…的顺序排列与各扫描线对应的显示数据PD后的视频数据信号VD向数据驱动器13供给。将离数据驱动器13的距离较近的扫描线和较远的扫描线组合而将与各组的2个扫描线对应的显示数据PD分别做成2个水平扫描线的量的显示数据，因此，与供给具有固定的脉冲宽度的扫描信号的比较例的显示装置相比，也能够以同等的传输时间进行从显示控制器12向数据驱动器13的显示数据PD的传输。因此，由于不需要高速传输，所以能够抑制功耗。
如以上那样，根据本实施例的显示装置100，能够进行抑制了功耗并抑制了起因于数据线阻抗的影响的亮度不均的显示。
【实施例2】
接着，对实施例2的显示装置进行说明。本实施例的显示装置具有与图1所示的实施例1的显示装置100同样的结构，在进行扫描线S1~Sn的预充电工作的方面与实施例1的显示装置100不同。
本实施例的栅极驱动器14与实施例1同样地对离数据驱动器13的距离较近的扫描线和较远的扫描线交替地供给扫描信号Vg1~Vgn，并且，供给根据离数据驱动器13的距离而不同的脉冲宽度（即，针对靠近数据驱动器13的扫描线，脉冲宽度较短，针对远离数据驱动器13的扫描线，脉冲宽度较长）的扫描信号。此时，栅极驱动器14进行与供给扫描信号的扫描线相邻的扫描线的预充电。
图7A是示出由本实施例的栅极驱动器14进行的扫描信号的供给和扫描线的预充电的时间图。
栅极驱动器14向扫描线S1供给扫描信号Vg1并且进行扫描线S2的预充电，向扫描线Sn供给扫描信号Vgn并且进行扫描线Sn-1的预充电。然后，栅极驱动器14向扫描线S2供给扫描信号Vg2并且进行扫描线S3的预充电，向扫描线Sn-1供给扫描信号Vgn-1并且进行扫描线Sn-2的预充电。
像这样，本实施例的栅极驱动器14在向数据线近端的扫描线供给扫描信号时进行与该扫描线的内侧（朝向数据线远端侧）相邻的扫描线的预充电。此外，栅极驱动器14在向数据线远端的扫描线供给扫描信号时进行与该扫描线的内侧（朝向数据线近端侧）相邻的扫描线的预充电。因此，各扫描线的预充电不是在被供给扫描信号的稍前而是在其的规定期间前（例如，针对扫描线S1的预充电在扫描信号Vg1的供给的期间Thn前）进行。
图7B是与本实施例不同而在扫描信号Vg1~Vgn的供给的稍前进行向扫描线S1~Sn的预充电的比较例的时间图。当在假设与实施例1同样地从扫描线S1~Sn的外侧朝向内侧交替地供给根据离数据驱动器13的距离而不同的脉冲宽度的扫描信号Vg1~Vgn的情况下在扫描信号的供给的稍前进行预充电时，针对离数据驱动器13的距离较远的扫描线，只能在短的期间内进行预充电。此外，在供给扫描信号的扫描线与进行预充电的扫描线分离的情况下，存在在图像显示中发生残像那样的映入（reflection）的可能性。
相对于此，根据本实施例的预充电工作，进行预充电的扫描线与供给扫描线的扫描线相邻，因此，能够抑制预充电对图像显示造成的残像等影响。此外，也能够针对远离数据驱动器13的扫描线进行充分的预充电。
再有，本发明不限定于上述实施方式。例如，在上述实施例中，说明了显示装置100为液晶显示装置的情况，但是，与此不同而为有机EL（Electro Luminescence）显示装置也可。在显示装置100为有机EL显示装置的情况下，像素部P11~Pnm的各个具备有机EL元件和对在有机EL元件中流动的电流进行控制的薄膜晶体管。薄膜晶体管根据供给到像素部P11~Pnm的灰度电压信号Gv1~Gvm来控制在有机EL元件中流动的电流，有机EL元件的发光亮度根据该电流而发生变化，由此，进行显示。在有机EL显示装置中，也能够通过应用本发明来进行抑制了亮度不均的显示。
此外，在上述实施例1中，以以下情况为例来进行了说明：在栅极驱动器14对靠近数据驱动器13的扫描线和远离数据驱动器13的扫描线交替地供给扫描信号Vg1~Vgn时，按扫描线S1、Sn、S2、Sn-1、S3…的顺序以从扫描线S1~Sn的外侧朝向内侧的方式供给扫描信号Vg1~Vgn。可是，与此相反，以从扫描线S1~Sn的内侧朝向外侧的方式对靠近数据驱动器13的扫描线和远离数据驱动器13的扫描线交替地供给扫描信号也可。即，栅极驱动器14只要对数据线近端的扫描线和数据线远端的扫描线交替地以规定的顺序供给扫描信号Vg1~Vgn即可。此外，显示控制器12只要以与其对应的规定的顺序按由第k显示数据和第（n+1-k）显示数据构成的显示数据对（k为1~（1/2）n的整数）的每一个将显示数据PD向数据驱动器13供给即可。
此外，在上述实施例中，说明了锁存电路131具有由传输门构成的开关的情况。可是，不限于此，具有边沿触发类型的开关等其他的开关也可。
此外，数据驱动器13和栅极驱动器14也可以分别构成为单一的驱动器LSI，也可以构成为分成多个驱动器LSI。
此外，显示面板11为彩色FHD（Full High Definition，全高清）面板也可，为4K面板或8K面板也可。
附图标记的说明
100 显示装置
11 显示面板
12 显示控制器
13 数据驱动器
14 栅极驱动器
131 锁存电路。

Claims (8)

1.一种显示装置，其特征在于，具有：
显示面板，有多个数据线、第1~第n扫描线、和在所述多个数据线与所述第1~第n扫描线的交叉部的各个设置的像素开关及像素部，其中，n为2以上的偶数；
栅极驱动器，向所述第1~第n扫描线供给在与脉冲宽度对应的选择期间将所述像素开关控制为接通的扫描信号；
数据驱动器，接收由第1~第n扫描线的各个所对应的第1~第n显示数据构成的1帧的量的视频数据信号，将与所述视频数据信号对应的灰度电压信号向所述多个数据线供给；以及
显示控制器，将所述视频数据信号向所述数据驱动器供给，
所述显示控制器将所述第1~第n显示数据按由第k显示数据和第（n+1-k）显示数据构成的显示数据对的每一个以规定的顺序向所述数据驱动器供给，其中，k为1~（1/2）n的整数，
所述栅极驱动器以与所述规定的顺序对应的顺序向所述多个扫描线供给具有脉冲宽度的所述扫描信号，所述脉冲宽度根据从所述数据驱动器到所述第1~第n扫描线的各个的距离而不同，
所述数据驱动器根据来自所述显示控制器的所述显示数据对的供给将所述灰度电压信号向所述多个数据线供给。
2.根据权利要求1所述的显示装置，其特征在于，
所述规定的顺序是k的值从k=1增加到k=（1/2）n的顺序，
所述栅极驱动器以从所述第1~第n扫描线之中的位于所述显示面板的外缘部的扫描线朝向位于所述显示面板的中央部的扫描线的顺序供给所述扫描信号。
3.根据权利要求1或2所述的显示装置，其特征在于，
所述显示控制器向所述栅极驱动器供给在被供给1画面的量的所述视频数据信号的1帧期间内时钟脉冲的间隔以阶段性地变短的方式发生变化的调制时钟信号、和使所述调制时钟信号反转后的反转时钟信号，
所述栅极驱动器基于所述调制时钟信号和所述反转时钟信号来生成具有脉冲宽度的所述扫描信号，所述脉冲宽度根据到所述第1~第n扫描线的各个的距离而不同。
4.根据权利要求1至3的任一项所述的显示装置，其特征在于，
所述数据驱动器具有锁存电路，所述锁存电路导入从所述显示控制器供给的所述显示数据，
所述锁存电路具有：
第1锁存部，导入从所述显示控制器供给的所述显示数据并输出；
第2锁存部，有导入所述第1锁存部输出的所述显示数据之中的、靠近所述数据驱动器侧的扫描线所对应的所述显示数据的近端侧锁存部、和导入远离所述数据驱动器侧的扫描线所对应的所述显示数据的远端侧锁存部，并且，交替地输出所述近端侧锁存部导入的所述显示数据和所述远端侧锁存部导入的所述显示数据；以及
第3锁存部，导入所述第2锁存部输出的所述显示数据并输出。
5.根据权利要求1至4的任一项所述的显示装置，其特征在于，所述栅极驱动器向所述多个扫描线的各个供给所述扫描信号，并且，对与该扫描线相邻的扫描线进行预充电。
6.一种显示控制器，连接于具有栅极驱动器和数据驱动器的显示装置，对所述栅极驱动器和所述数据驱动器进行控制，所述显示控制器的特征在于，
将由第1~第n显示数据构成的1帧的量的视频数据信号按由第k显示数据和第（n+1-k）显示数据构成的显示数据对的每一个以规定的顺序向所述数据驱动器供给，其中，k为1~（1/2）n的整数。
7.一种栅极驱动器，连接于具有多个数据线、第1~第n扫描线、和在所述多个数据线与所述多个扫描线第1~第n扫描线的交叉部的各个设置的像素开关及像素部的、显示面板，并且，向所述第1~第n扫描线供给在与脉冲宽度对应的选择期间将所述像素开关控制为接通的扫描信号，其中，n为2以上的偶数，所述栅极驱动器的特征在于，
按由第k扫描线和第（n+1-k）扫描线构成的扫描线对的每一个以规定的顺序向所述多个扫描线供给具有脉冲宽度的所述扫描信号，所述脉冲宽度根据从所述数据驱动器到所述第1~第n扫描线的各个的距离而不同，其中，k为1~（1/2）n的整数。
8.一种数据驱动器，连接于具有多个数据线、第1~第n扫描线、和在所述多个数据线与所述多个扫描线第1~第n扫描线的交叉部的各个设置的像素开关及像素部的、显示面板，并且，将与视频数据信号对应的灰度电压信号向所述多个数据线供给，其中，n为2以上的偶数，所述数据驱动器的特征在于，
接收由第1~第n显示数据构成的1帧的量的视频数据信号的输入，将第1~第n显示数据按由第k显示数据和第（n+1-k）显示数据构成的显示数据对的每一个以规定的顺序向所述多个数据线供给与所述显示数据对应的灰度电压信号，其中，k为1~（1/2）n的整数。
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