CN101981611A - 在液晶显示器的源极驱动器芯片产生帧起始脉冲信号的方法 - Google Patents

在液晶显示器的源极驱动器芯片产生帧起始脉冲信号的方法 Download PDF

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CN101981611A
CN101981611A CN2009801113080A CN200980111308A CN101981611A CN 101981611 A CN101981611 A CN 101981611A CN 2009801113080 A CN2009801113080 A CN 2009801113080A CN 200980111308 A CN200980111308 A CN 200980111308A CN 101981611 A CN101981611 A CN 101981611A
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高晚祯
金彦泳
罗俊皞
金大成
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LX Semicon Co Ltd
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Abstract

本发明提供一种驱动液晶显示器的方法，尤其是提供一种在液晶显示器的源极驱动器芯片内产生用以引发驱动源极驱动器的特殊功能的帧起始脉冲信号。因此，藉由产生用以引发驱动源极驱动器芯片内的源极驱动器的特殊功能的帧起始脉冲信号，不同于传统的方法中帧起始脉冲信号为外部输入，可以减少用于输入帧起始脉冲信号的输入接脚的数量并可以在印刷电路板内安装源极驱动器芯片的过程中去除用于输入帧起始脉冲信号的输入线。

Description

在液晶显示器的源极驱动器芯片产生帧起始脉冲信号的方法
技术领域
本发明涉及一种驱动液晶显示器的方法，尤其涉及一种在液晶显示器的源极驱动器芯片内产生引发驱动源极驱动器的特殊功能的帧起始脉冲信号的方法。
背景技术
在液晶显示(LCD)器中，液晶可藉由根据输入电压而改变液晶分子的配向来传输光线，如此图像数据就可以被显示出来。
近来，在液晶显示器中，薄膜晶体管(TFT)液晶显示器已经得到广泛而积极地使用，所述薄膜晶体管液晶显示器是利用制造硅集成电路的技术来制造的。
图1为显示普通液晶显示器的面板驱动系统。
如图1所示，该液晶显示器的面板驱动系统包括：由液晶、彩色滤波器以及诸如此类的东西所构成的面板30；由栅极驱动器41、42和43所构成并用以驱动它们的栅极驱动器单元40；由源极驱动器21、22和23所构成并用以驱动源极的源极驱动单元20；以及控制栅极驱动单元40和源极驱动单元20并输出像素数据的时序控制器10。
每个像素是由开关晶体管和液晶装置所构成。开关晶体管的栅极端经栅极驱动器41、42、43...来驱动。开关晶体管的一端，除了栅极端与液晶装置连接之外，该相对端与源极驱动器21、22、23...的其中之一的输出端连接。
时序控制器10控制液晶显示器的整个面板驱动系统。该时序控制器10传送时序信号CLK、LOAD以及SPi，用以控制所述栅极驱动器、所述源极驱动器以及传送到所述源极驱动器21、22、23...的视频信号R、G以及B。
通常，时序控制器10接收以低电压差分信号(LVDB)方式传送至源极驱动器的视频信号R、G以及B。该时序控制器10将数据以微型低电压差分信号(mLVDS)方式传送至所述源极驱动器。
在将晶体管-晶体管-逻辑(TTL)用于让时序控制器传送数据至驱动器集成电路(IC)的传统方式中，存在传送率低、电流消耗高以及电磁接口(EMI)特性弱的问题。该LVDS方式藉由补偿TTL方式的问题来大幅减小信号电压摆幅大小。
除此之外，mLVDS方式大大地降低了电流消耗并藉由进一步减小电压摆幅大小来提高整个芯片的EMI特性。在LVDS和mLVDS方式中的数据传送对于熟悉液晶显示器领域的技术人员而言是众所周知地，并因此省略对其的详细描述。
图2为显示了使用传统mLVDS方式来识别在液晶显示器内的重设信号的时序图。
在使用传统mLVDS方式的液晶显示器中，该重设信号是藉由下面过程来识别。首先，在负载信号LOAD处于高状态被输入的状态下，信号LVO+，-为以mLVDS方式来传送的输入数据信号，并在低状态下维持200ns或以上(t2)。在这之后，所述信号在高状态下维持三个或更多频率(CLKs)(t3)。
其次，在频率信号CLK+，-的上升沿处所触发的输入数据信号LVO+，-的第一低信号RST＝L被识别为该重设信号。该时序控制器将用以驱动源极驱动器的特殊功能的帧起始脉冲信号传至源极驱动器。
在使用传统mLVDS方式的液晶显示器中，由于需要驱动源极驱动器的特殊功能的帧起始脉冲信号由外部的时序控制器输入，所以这里存在的问题就是额外需要用以将帧起始脉冲信号输入至源极驱动器芯片内的输入接脚，以及在安装有源极驱动器的印刷电路板内额外需要有用以输入帧起始脉冲信号的输入线。
发明内容
本发明提供一种在本发明的液晶显示器的源极驱动器芯片内产生帧起始脉冲信号的方法，藉由产生帧起始脉冲信号用以引发驱动源极驱动器的特殊功能，因此可减少用以输入帧起始脉冲信号的输入接脚数量，并可移除用以在印刷电路板内安装源极驱动器芯片的过程中输入帧起始脉冲信号的输入线。
根据本发明的一个方面，提供有一种在液晶显示器的源极驱动器芯片内产生用以引发驱动源极驱动器的特殊功能的帧起始脉冲信号的方法，包含：负载信号启动步骤，启动负载信号用以指定新重设信号的起始点；重设低维持步骤，让多个数据输入信号中用来作为重设识别输入信号的数据输入信号LV0在低状态下维持预定时间周期；以及重设高维持步骤，让该数据输出信号在该重设低维持步骤后在高状态下维持三个或更多个频率；
其中，如果在该重设高维持步骤中的该数据输入信号LV0在高状态下维持一个或多个预定频率，则帧起始脉冲信号产生于源极驱动器芯片内。
可以理解地是，前面概述和后面详细描述都具实例性和解释性，并意图对本发明实施例提供进一步的解释说明。
附图说明
图1显示普通液晶显示器的面板驱动系统；
图2为显示了使用传统mLVDS方式来识别在液晶显示器内的重设信号的时序图；
图3为本发明用以产生帧起始脉冲信号的时序图；
图4为显示本发明实施例中确定帧起始脉冲信号产生的方法的时序图；以及
图5为由其它数据输入信号输入“RST＝H”的识别信号的时序图。
具体实施方式
本发明藉由在液晶显示器的源极驱动器芯片内产生引发驱动源极驱动器的特殊功能的帧起始脉冲信号来去除输入帧起始脉冲信号的输入接脚和输入线。
此后，本发明将参考所附图式进行详细描述。
图3为本发明用以产生帧起始脉冲信号的时序图。
参考图2所示，在负载信号LOAD为高状态时输入，以mLVDS方式将要被传送的输入数据信号LVO+，-在低状态下维持200ns或更多的时间(t2)。这里，负载信号LOAD定义了新重设信号的起始点。在那之后，所述信号在高状态下维持了三个或更多个频率(t3)。
其次，根据本发明，在频率信号CLK+，-的上升沿所触发的输入数据信号LV0+，-的第一低信号RST＝L输入之前，重设高周期(t3)维持三个或更多个频率，该频率信号CLK+，-用作产生起始脉冲信号的限制信号。
意味着，当数据输入信号LV0+，-当作重设识别输入信号输入使用时，则藉由使用在该信号“RST＝L”输入之前维持了三个或更多个频率的重设高周期(t3)来确定产生起始脉冲信号。
图4为显示本发明实施例中确定帧起始脉冲信号产生的方法的时序图。
如图4所示，如果在频率信号CLK+，-的上升沿检测到六个或更多个的“RST＝H”，而在该六个或更多个的“RST＝H”中该用作重设识别输入信号的数据输入信号LV0+，-在重设高状态下维持了三个或更多个CLKs，则该帧起始脉冲信号产生于源极驱动器芯片内。如果在频率信号CLK+，-的上升沿检测到五个或更少个的“RST＝H”的话，则不产生帧起始脉冲信号。
图4所示的实施例是在源极驱动器芯片内产生帧起始脉冲信号的方法的例子。因此，“RST＝H”周期的各种变换可以用作在源极驱动器芯片内产生帧起始脉冲信号的限制信号。
意味着，该频率信号CLK+，-的下降沿可用来检测“RST＝H”的周期。除此之外，亦可使用频率信号CLK+，-的双边缘。
图5为由其它数据输入信号输入“RST＝H”的识别信号的时序图。
根据本发明中液晶显示器的源极驱动器芯片内所产生的帧起始脉冲信号的方法，可以理解地是，除了多个数据输入信号中的该信号LV0+，-之外，其它数据输入信号LV1+，-至LV5+，-中的任意数据输入信号可被选择为“RST＝H”的限制信号。
表1
根据SB信号的微型低电压差分信号(Mini-LVDS)总线导退作用
  接脚名称   SB＝″L″   SB＝″H″
  LV0A   LV0+   LV5-
  LV0B   LV0-   LV5+
  LV1A   LV1+   LV4-
  LV1B   LV1-   LV4+
  LV2A   LV2+   LV3-
  LV2B   LV2-   LV3+
  CLKA   CLK+   CLK-
  CLKB   CLK-   CLK+
  LV3A   LV3+   LV2-
  LV3B   LV3-   LV2+
  LV4A   LV4+   LV1-
  LV4B   LV4-   LV1+
  LV5A   LV5+   LV0-
  LV5B   LV5-   LV0+
表1显示出信号LV0+，-的位置和相位，即，根据mLVDS接口内SB信号状态而改变的重设识别输入信号。参考表1，可以了解多个数据输入信号LV0至LV5用作经反转成为输入的重设识别输入信号。
当信号LV0+，-和相位根据下面SB信号条件而改变时，重设信号被输入。也就是，在SB＝L的情况下，信号LV0A被输入为LV0+，而信号LV0B被输入为LV0-。因此，LV0+被输入至接脚LVxA。当SB＝H的情况下，信号LV5A被输入为LV0-，而信号LV5B被输入为LV0+。因此，LV0+被输入至接脚LVxB。
在这个方式下，信号LV0+的输入位置和相位是根据SB信号的条件而改变为输入。
在SB＝L和SB＝H的情况下，输入重设信号如下。在负载信号LOAD的上升沿之后，该信号LV0+在低状态Low_0下维持了200ns，以及之后在高状态下维持了三个或更多个频率。在第一个接着的输入频率信号CLK的上升沿处所检测到的信号“RST＝L”被用作重设信号。
意味着，在SB＝H的情况下，由于输入重设信号为LV5B＝LV0+，且有鉴于源极驱动器芯片的输入，则将该重设信号的相位反转后输入。
如上所述，在SB＝H的情况下，尽管具有相反相位的重设信号可输入至输入接脚，但该相位仍再一次在源极驱动器芯片内反转。因此，考虑到源极驱动器芯片的内侧，可利用与SB＝L情况下相同的相位。
根据本发明中在液晶显示器的源极驱动器芯片内产生帧起始脉冲信号的方法，不同于由外部输入帧起始脉冲信号的传统方法，而是藉由产生帧起始脉冲信号用以在源极驱动器芯片内引发驱动源极驱动器的特殊功能，其可减少用以输入帧起始脉冲信号的输入接脚数量，并可移除用以在印刷电路板内安装源极驱动器芯片的过程中输入帧起始脉冲信号的输入线。
除此之外，由于用以处理特殊帧或水平线的图像数据的信号产生于源极驱动器芯片内，则可以简单地完成内部逻辑。
当描述与本发明有关示范实施例时，很明显的是在此领域的技术人对本发明所做的任何修改及变动都无法脱离本发明的精神与范围。

Claims (6)

1.一种在液晶显示器的源极驱动器芯片内产生引发驱动源极驱动器的特殊功能的帧起始脉冲信号的方法，包括：
负载信号启动步骤，启动负载信号用以指定新重设信号的起始点；
重设低维持步骤，让多个数据输入信号中被用来作为重设识别输入信号的数据输入信号在低状态下维持预定时间周期；以及
重设高维持步骤，让该数据输入信号在该重设低维持步骤后在高状态下维持三个或更多个频率；
其特征在于，如果在该重设高维持步骤中的该数据输入信号在高状态下维持一个或多个预定频率，则该帧起始脉冲信号产生于该源极驱动器芯片内。
2.如权利要求1所述的方法，其特征在于，在该重设高维持步骤中，如果该数据输入信号在高状态下维持六个或更多个频率，则该帧起始脉冲信号产生于该源极驱动器芯片内。
3.如权利要求1所述的方法，其特征在于，在该重设高维持步骤中，藉由该频率信号的上升沿或下降沿来检测该数据输入信号是否维持在高状态下。
4.如权利要求1所述的方法，其特征在于，在该重设高维持步骤中，藉由该频率信号的上升沿以及下降沿来检测该数据输入信号是否维持在高状态下。
5.如权利要求1所述的方法，其特征在于，该帧起始脉冲信号是用来处理特殊帧或该液晶显示器面板的特殊水平线的图像数据的信号。
6.如权利要求1至5任一项所述的方法，其特征在于，用于该重设识别输入信号的多个该数据输入信号被反转为输入。
CN200980111308.0A 2008-04-01 2009-03-12 在液晶显示器的源极驱动器芯片产生帧起始脉冲信号的方法 Expired - Fee Related CN101981611B (zh)

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