CN104657068A - 显示设备及其驱动方法 - Google Patents
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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
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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
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- 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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- 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
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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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Abstract
公开了显示设备及其驱动方法。该显示设备包括:显示面板,该显示面板包括公共地连接到像素的公共电极;显示驱动电路,该显示驱动电路用于在垂直活动时间向像素施加数据电压;以及传感器驱动电路,该传感器驱动电路在垂直空白时间向公共电极施加手势感测驱动信号并且感测手势输入。
Description
技术领域
本发明的实施方式涉及显示设备及其驱动方法。
背景技术
用户接口(UI)被构造为使得用户能够与各种电子设备进行通信,并且由此能够如他们期望的容易且舒适地控制电子设备。用户接口的示例包括键区、键盘、鼠标、屏上显示(OSD:on-screen display)和具有红外线通信功能或射频(RF)通信功能的远程控制器。已经不断地扩展用户接口技术,以提高用户的感受性(sensibility)和处理便利性。用户接口已经发展为包括触摸UI、语音识别UI、3DUI等。用于感测用户手势(gesture)的手势UI目前已经应用于到家用电器。
手势UI利用照相机或运动传感器来感测用户的手势或物体在空间上的移动。为了在显示设备中实现手势UI,不得不添加单独的用于手势感测的传感器。然而,单独的传感器导致显示设备的成本增加。
本申请要求2013年11月19日提交的韩国专利申请No.10-2013-0140535的优先权,为了一切目的而通过引用将其全部内容并入这里,如同在此完整阐述。
发明内容
一方面,存在一种显示设备,该显示设备包括:显示面板,该显示面板包括公共地连接到像素的公共电极;显示驱动电路,该显示驱动电路被构造为在垂直活动时间向像素施加数据电压;以及传感器驱动电路,该传感器驱动电路被构造为在垂直空白时间向公共电极施加手势感测驱动信号并且感测手势输入。
另一方面,存在一种用于驱动显示设备的方法,该显示设备包括公共地连接到像素的公共电极,该方法包括以下步骤:在垂直活动时间向像素施加数据电压;以及在垂直空白时间向公共电极施加手势感测驱动信号并且感测手势输入。
附图说明
附图被包括以提供对本发明的进一步理解,并且附图被并入且构成本说明书的一部分,附图例示本发明的实施方式,并且与说明书一起用于解释本发明的原理。在图中:
图1是根据本发明的示例性实施方式的显示设备的框图;
图2是示出液晶显示器(LCD)的像素的等效电路图;
图3是示出有机发光二极管(OLED)显示器的像素的等效电路;
图4示出视频电子标准协会(VESA:video electronics standards association)标准的显示时序中的根据本发明的示例性实施方式的手势感测时序;
图5是详细示出图1所示的传感器驱动电路的框图;
图6是示出划分显示面板的公共电极以实现互电容式传感器矩阵的示例的等效电路图;
图7是互电容式传感器矩阵的一部分的放大平面图;以及
图8是示出划分显示面板的公共电极以实现自电容式传感器矩阵的示例的等效电路图。
具体实施方式
根据本发明的示例性实施方式的显示设备可以被实现为平板显示器,诸如液晶显示器(LCD)和有机发光二极管(OLED)显示器。
根据本发明的实施方式的显示设备利用用于驱动显示面板的像素的组件来实现手势传感器,而不添加单独的手势传感器。根据本发明的实施方式的显示设备在不输入图像数据的空白时段中感测手势,以便不减小显示驱动时段的长度并且不影响显示驱动。
根据本发明的实施方式的手势传感器可以被实现为电容式传感器。电容式传感器可以被实现为自电容式传感器或互电容式传感器。自电容式传感器沿着一个方向分别连接到传感器线。互电容式传感器形成在两条传感器线的交叉点处,这两条传感器线彼此垂直,在它们之间插入有介电层。
现在将详细描述本发明的实施方式,在附图中例示了本发明的实施方式的示例。在可能的情况下,在整个附图中将使用相同的附图标记来指代相同或类似的部件。将注意的是,如果确定现有技术可能误导本发明的实施方式,则省略该现有技术的详细描述。
如图1至图4所示,根据本发明的实施方式的显示设备包括显示面板100、显示驱动电路、传感器驱动电路300等。
显示面板100的像素阵列包括像素PIX,像素PIX形成在由数据线D1至Dm(其中,m是正整数)和选通线G1至Gn(其中,n是正整数)限定的像素区域中。像素PIX可以被实现为图2所示的LCD的像素或图3所示的OLED显示器的像素。
如图2所示,LCD的像素PIX包括:薄膜晶体管(TFT),该薄膜晶体管(TFT)形成在数据线D1至Dm与选通线G1至Gn的交叉点处;像素电极,该像素电极被充电到数据电压;公共电极,公共电压Vcom被提供给该公共电极;存储电容器Cst,该存储电容器Cst连接到像素电极并且保持液晶单元的电压;等等。
如图3所示,OLED显示器的像素PIX包括:开关TFT ST;驱动TFT DT,该驱动TFT DT连接到开关TFT ST;OLED和存储电容器Cst,它们连接到驱动TFT DT;电极,高电势像素电源电压VDD和低电势像素电源电压VSS被提供给这些电极;等等。每个像素PIX可以进一步包括补偿电路,该补偿电路感测并补偿驱动TFT DT的阈值电压和迁移率(mobility)。
显示面板100可以进一步包括滤色器和黑色基底(black matrix)。当LCD被实现为显示设备时,背光单元可以设置在显示面板100的背表面下方。
显示面板100的像素PIX由显示驱动电路驱动。显示驱动电路在垂直活动时间AT将输入图像的数据施加于像素PIX。显示驱动电路包括:数据驱动电路202、选通驱动电路(或扫描驱动电路)204和定时控制器206。
输入图像的数字视频数据RGB在垂直活动时间AT被与定时信号Vsync、Hsync、DE和MCLK同步地输入到定时控制器206。数据驱动电路202将从定时控制器206接收到的数字视频数据RGB转换成伽马补偿电压,并且在垂直活动时间AT输出该数据电压。从数据驱动电路202输出的数据电压在垂直活动时间AT被通过数据线D1至Dm提供给像素PIX。新输入图像的数据在垂直空白时间VB不被输入到数据驱动电路202。
在垂直活动时间AT驱动选通驱动电路204。更具体地,选通驱动电路204将与数据电压同步的选通脉冲(或扫描脉冲)顺序提供给选通线G1至Gn,并且选择显示面板100的施加了数据电压的线。选通脉冲在选通高电压VGH和选通低电压VGL之间摆动。选通驱动电路204在垂直空白时间VB不产生选通脉冲。由此,在定时控制器206的控制下,数据驱动电路202和选通驱动电路204在垂直空白时间VB不产生新输出。
定时控制器206与定时信号Vsync、Hsync、DE和MCLK同步地将从主机系统(未示出)接收到的输入图像的数字视频数据RGB发送到数据驱动电路202。输入图像的数字视频数据RGB与数据使能信号DE同步,并且在垂直活动时间AT被输入到定时控制器206。另一方面,在垂直空白时间VB,输入图像的数字视频数据RGB和数据使能信号DE不被输入到定时控制器206。
主机系统可以被实现为电视系统、机顶盒、导航系统、DVD播放器、蓝光播放器、个人计算机(PC)、家庭影院系统和电话系统中的一种。主机系统包括内嵌有定标器(scaler)的片上系统(SoC:system on chip),并且由此将输入图像的数字视频数据转换为适用于在显示面板100上显示的格式。主机系统向定时控制器206发送数字视频数据和定时信号Vsync、Hsync、DE和MCLK。主机系统运行与从传感器驱动电路300接收到的触摸输入或手势输入的坐标信息XY关联的应用。
输入到定时控制器206的定时信号Vsync、Hsync、DE和MCLK包括:垂直同步信号Vsync、水平同步信号Hsync、数据使能信号DE和主时钟MCLK。定时控制器206利用定时信号Vsync、Hsync、DE和MCLK生成用于控制数据驱动电路202和扫描驱动电路204的操作时序的定时控制信号。
定时控制器206不减少垂直活动时间AT(其中新数据应用于像素),并且像普通显示设备那样控制垂直活动时间AT。换言之,定时控制器206不通过调制定时信号Vsync、Hsync、DE和MCLK并减少垂直活动时间AT来确保触摸感测时段或手势感测时段。由此,根据本发明的实施方式的显示设备不减少像素的数据充入(charge)时间来确保触摸感测时段或手势感测时段。
传感器驱动电路300在垂直空白时间VB(其中没有输入图像的数据)将手势感测驱动信号SP施加于显示面板100的公共电压,并且分析手势感测驱动信号SP的变化量,从而决定手势输入。手势输入是下述物体的位置输入,该物体不接触显示面板100的屏幕并且位于显示面板100的屏幕前面。另一方面,触摸输入是下述物体的位置输入,该物体接触显示面板100的屏幕。根据本发明的实施方式的显示设备在垂直空白时间VB不感测触摸输入,而感测手势输入。
传感器驱动电路300利用预定手势识别算法来分析手势感测驱动信号SP。更具体地,传感器驱动电路300判定当手势感测驱动信号SP的变化量等于或大于预定阈值时生成手势输入。手势识别算法可以使用已知算法。
公共电极是指公共地连接到显示面板的屏幕(即,图4所示的显示区域)内的所有像素的电极。例如,公共电极可以是在图2所示的LCD中的被提供公共电压Vcom的公共电极,或在图3所示的OLED显示器中的被提供高电势像素电源电压VDD和低电势像素电源电压VSS的公共电极。即,在垂直活动时间AT向公共电极提供像素的公共电压Vcom、VDD和VSS。另一方面,在垂直空白时间VB向公共电极输入手势感测驱动信号SP。
如果在显示面板内没有划分公共电极,并且该公共电极连接到显示面板的屏幕(即,图4所示的显示区域)内的所有像素,则传感器驱动电路300在垂直空白时间VB不判定手势输入的方向或距离,并且可以仅判定是否存在手势输入。在这种情况下,因为主机系统可以判定是否存在手势输入,所以主机系统可以用于简单的转换功能,例如,通电或断电。
考虑到能够感测的高度或电场强度,可以适当设置手势感测驱动信号SP的电压。在LCD中,在比图2和图4所示的公共电压Vcom大的电压下生成手势感测驱动信号SP。可以在与施加于电容式传感器的触摸感测信号相同的电压(在现有触摸屏中使用)下生成手势感测驱动信号SP,或者可以在比触摸感测驱动信号大的电压下生成手势感测驱动信号SP。另外,可以将手势感测驱动信号SP生成为多级波形的信号,其中,初始电压被设置为高值。
图4示出在视频电子标准协会(VESA)标准的显示时序中的根据本发明的示例性实施方式的手势感测时序。
如图4所示,数据使能信号DE与输入图像的数据同步。数据使能信号DE的一个脉冲的周期是一个水平周期,并且数据使能信号DE的高逻辑周期表示一条线上的数据输入时序。一个水平周期是将数据施加于显示面板100的一条线上的像素所需的水平寻址时间。
在垂直活动时间AT输入数据使能信号DE和输入图像的数据,而在垂直空白时间VB不输入数据使能信号DE和输入图像的数据。垂直活动时间AT是在显示面板100的显示区域的所有像素(上面显示图像)上显示与一个帧的量对应的数据所需的垂直寻址时间。一个帧周期是在显示面板100上显示一个帧的数据所需的时间,并且等于一个垂直活动时间AT和一个垂直空白时间VB的总和。
垂直空白时间VB包括:垂直同步时间VS、垂直前沿(front porch)FP和垂直后沿(back porch)BP。垂直同步时间VS是范围从垂直同步信号Vsync的下降沿到上升沿的时间,并且指示一个画面的开始时刻(或结束时刻)。
垂直空白时间VB在全高清(FHD)分辨率中等于或大于大约475μs。在垂直空白时间VB,可以执行几十至几百个手势感测操作。
垂直前沿FP是下述时间,其范围从最后数据使能信号DE的下降沿(指示一个帧的数据中最后一条线的数据时序)到垂直空白时间VB的开始时间点。垂直后沿BP是下述时间,其范围从垂直空白时间VB的结束时间点到第一数据使能信号DE的上升沿(指示一个帧的数据中第一条线的数据时序)。
显示驱动电路在垂直活动时间AT将输入图像的数据施加于像素。传感器驱动电路300在垂直空白时间VB将手势感测驱动信号SP施加于显示面板100的公共电极,并且感测手势输入。
图5是详细示出传感器驱动电路300的框图。
如图5所示,传感器驱动电路300包括:复用器302、手势感测驱动器304和算法执行单元306。
复用器302在垂直活动时间AT将公共电压Vcom、VDD和VSS提供给显示面板100的公共电极,并且在垂直空白时间VB将手势感测驱动信号SP提供给显示面板100的公共电极。
手势感测驱动器304在垂直空白时间VB生成手势感测驱动信号SP,并且向复用器302提供手势感测驱动信号SP。手势感测驱动器304利用模数转换器(ADC)将通过复用器302接收到的手势感测驱动信号SP的变化量转换成数字数据,并且向算法执行单元306发送该数字数据。
算法执行单元306将从手势感测驱动器304接收到的数字数据与预定阈值进行比较。算法执行单元306判定当手势感测驱动信号SP的变化量等于或大于预定阈值时生成手势输入,并且生成中断信号。如果公共电极被分为多个公共电极并且对手势输入的方向和空间坐标进行感测,则算法执行单元306可以在感测到手势输入时向主机系统发送手势输入位置的空间坐标。算法执行单元306可以被实现为微控制器单元(MCU)和存储器。
可以如图6至图8所示地对显示面板100的公共电极进行划分,使得能够进行各种操作的识别。
图6是示出划分显示面板的公共电极以实现互电容式传感器矩阵的示例的等效电路图。图7是互电容式传感器矩阵的一部分的放大平面图。
如图6和图7所示,互电容式传感器矩阵包括Tx线Tx1至TxN和Rx线Rx1至RxM(其与Tx线Tx1至TxN垂直),介电层插入在Tx线Tx1至TxN与Rx线Rx1至RxM之间。
显示面板的公共电极可以被划分为Tx线Tx1至TxN,或者可以被划分为Tx线Tx1至TxN和Rx线Rx1至RxM。由此,公共电极在垂直活动时间AT向像素提供公共电压Vcom、VDD和VSS,并且在垂直空白时间VB用作多个传感器电极。
Tx线Tx1至TxN和Rx线Rx1至RxM的尺寸大于像素PIX的尺寸,并且Tx线Tx1至TxN和Rx线Rx1至RxM连接到多个像素。互电容Cm形成在Tx线Tx1至TxN与Rx线Rx1至RxM的每个交叉点处。
在垂直空白时间VB,传感器驱动电路300向Tx线Tx1至TxN(从公共电极划分)施加手势感测驱动信号SP,并且通过Rx线Rx1至RxM接收手势感测驱动信号SP。Rx线Rx1至RxM由所划分的公共电极实现,或者由连接到像素的数据线D1至Dm或选通线G1至Gn实现。因为像素在垂直空白时间VB保持之前的数据,所以数据线D1至Dm或选通线G1至Gn在垂直空白时间VB可以用作Rx线Rx1至RxM。由此,当互电容式传感器用于手势感测时,根据本发明的实施方式的显示设备不另外形成Tx线Tx1至TxN和Rx线Rx1至RxM,并且可以利用现有像素阵列的组件来实现Tx线Tx1至TxN和Rx线Rx1至RxM。
图8是示出划分显示面板的公共电极以实现自电容式传感器矩阵的示例的等效电路图。
如图8所示,自电容式传感器矩阵包括:以矩阵形式布置的传感器电极TE1至TEi;和分别连接到传感器电极TE1至TEi的传感器线。
显示面板的公共电极可以被划分为传感器电极TE1至TEi和传感器线。由此,公共电极在垂直活动时间AT向像素提供公共电压Vcom、VDD和VSS,并且在垂直空白时间VB用作多个传感器电极。
在垂直空白时间VB,传感器驱动电路300向从公共电极划分的传感器电极TE1至TEi施加手势感测驱动信号SP,并且通过传感器线接收手势感测驱动信号SP。
如上所述,因为本发明的实施方式不减少显示设备的一个帧周期中的垂直活动时间,所以本发明的实施方式不影响显示驱动。本发明的实施方式不将用于手势感测的单独传感器添加于显示面板,并且利用公共地连接到像素的公共电极在垂直空白时间感测手势。
虽然已经参照其多个例示性实施方式描述了实施方式,但应当理解的是,本领域技术人员能够设想出许多其它修改和实施方式,这些其它修改和实施方式将落入本公开的原理的范围内。更具体地,在本公开、附图和所附权利要求书的范围内,能够在主题组合布置的组成部件和/或布置方面做出各种变化和修改。除了在这些组成部分和/或布置中的变化和修改以外,替代的使用方式对本领域技术人员而言也是显而易见的。
Claims (10)
1.一种显示设备,其中,一个帧周期被划分为输入输入图像的数据的垂直活动时间和不输入所述输入图像的所述数据的垂直空白时间,所述显示设备包括:
显示面板,所述显示面板包括公共地连接到像素的公共电极;
显示驱动电路,所述显示驱动电路被构造为在所述垂直活动时间向所述像素施加数据电压;以及
传感器驱动电路,所述传感器驱动电路被构造为在所述垂直空白时间向所述公共电极施加手势感测驱动信号并且感测手势输入。
2.根据权利要求1所述的显示设备,其中,在所述显示面板中不划分所述公共电极。
3.根据权利要求2所述的显示设备,其中,所述传感器驱动电路只在所述垂直空白时间判定是否存在所述手势输入。
4.根据权利要求1所述的显示设备,其中,所述公共电极被划分为多个公共电极。
5.根据权利要求1所述的显示设备,其中,所述传感器驱动电路在所述垂直空白时间判定所述手势输入并且输出手势输入位置的坐标。
6.根据权利要求4所述的显示设备,其中,所述划分的公共电极在所述垂直空白时间作为互电容式传感器矩阵进行操作。
7.根据权利要求4所述的显示设备,其中,所述划分的公共电极在所述垂直空白时间作为自电容式传感器矩阵进行操作。
8.一种用于驱动显示设备的方法,所述显示设备包括公共地连接到像素的公共电极,其中,一个帧周期被划分为输入输入图像的数据的垂直活动时间和不输入所述输入图像的所述数据的垂直空白时间,所述方法包括以下步骤:
在所述垂直活动时间向所述像素施加数据电压;以及
在所述垂直空白时间向所述公共电极施加手势感测驱动信号并且感测手势输入。
9.根据权利要求8所述的方法,其中,在所述垂直空白时间向所述公共电极施加所述手势感测驱动信号并且感测所述手势输入的步骤包括只在所述垂直空白时间判定是否存在所述手势输入,
其中,在所述显示面板中不划分所述公共电极。
10.根据权利要求9所述的方法,其中,在所述垂直空白时间向所述公共电极施加所述手势感测驱动信号并且感测所述手势输入的步骤包括:
在所述垂直空白时间判定所述手势输入并且生成手势输入位置的坐标;以及
将所述公共电极划分为多个公共电极。
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CN101952792A (zh) * | 2007-11-19 | 2011-01-19 | 瑟克公司 | 与显示器结合且具有接近及触摸感应能力的触摸板 |
CN102033348A (zh) * | 2009-09-29 | 2011-04-27 | 乐金显示有限公司 | 液晶显示设备 |
CN102445799A (zh) * | 2010-10-08 | 2012-05-09 | 乐金显示有限公司 | 液晶显示装置 |
US20130265256A1 (en) * | 2012-04-07 | 2013-10-10 | Cambridge Touch Technologies, Ltd. | Pressure sensing display device |
TW201344526A (zh) * | 2012-04-27 | 2013-11-01 | Orise Technology Co Ltd | 內嵌式多點觸控液晶顯示面板系統 |
Also Published As
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KR20150058642A (ko) | 2015-05-29 |
KR102063349B1 (ko) | 2020-01-08 |
US10002590B2 (en) | 2018-06-19 |
JP2015099584A (ja) | 2015-05-28 |
CN104657068B (zh) | 2018-05-29 |
EP2874145A1 (en) | 2015-05-20 |
JP6084186B2 (ja) | 2017-02-22 |
EP2874145B1 (en) | 2018-01-10 |
US20150138173A1 (en) | 2015-05-21 |
TWI543055B (zh) | 2016-07-21 |
TW201520867A (zh) | 2015-06-01 |
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