CN104867469B - 可进行插黑的显示装置 - Google Patents
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Abstract
本发明公开一种可插黑的显示装置。伽马电路包括二选一多路选择器,选择器的一个输入端的输入数据为伽马电路输出的VCOM电压,另一个输入端的输入数据为伽马电路的多次可编程存储器存储的一预设值经过数模转换转换后的电压。时序控制电路的其中一个通用输入输出GPIO接口被配置为控制选择器的输出的控制接口,选择器在控制接口的控制下,选择输出伽马电路输出的VCOM电压时,输出的电压经伽马电路中的运算放大器放大后输出至源极驱动电路,作为源极驱动电路进行数模转换时所需的第一伽马参考电压,此时,时序控制电路不进行数据输出,从而实现插黑画面输出。本发明可在降低显示装置的功耗的情况下,实现插黑画面输出。
Description
技术领域
本发明涉及显示装置技术领域,尤其涉及一种可进行插黑的显示装置。
背景技术
随着LCD显示技术的不断发展,无论是广大消费者,还是从事液晶显示行业从业者,对显示面板的画面显示效果要求越来越高,对液晶显示面板的各种规格也要求的越来越严苛。众所周知液晶显示面板最低的画面刷新率为60Hz,显示一帧画面的时长约16.7ms,但是在某些特定的画面容易看到严重的拖影。受制于液晶的响应时间较慢,很长一段时间画面刷新率都无法做到提升。随着技术的发展,液晶的响应时间也越来越快,画面刷新率的提升变成了现实。因此,为了解决之前的拖影,将画面刷新率翻倍,在原来两帧之间插入一个黑画面(即插黑)的技术变成了可能。另外,随着液晶显示技术的发展,3D显示技术也迅速地进入了人们的日常生活中。但3D显示有一个最大的问题就是左右眼的画面出现交叠(crosstalk),影响了3D的显示效果,因此在3D显示技术中也广泛应用了插黑技术,即为了提高液晶面板的画面刷新率,在左右眼画面中间插入一个黑画面以避免crosstalk的出现。
目前,插黑技术是通过控制时序控制(T-CON,时序控制)电路输出的数字信号实现的。通过T-CON插黑就是一帧的数据是正常画面的数据,另外一帧的数据为00000000(即插黑画面)。例如,第一帧输出正常情况下的第一帧,第二帧输出一个黑画面,第三帧输出正常情况下的第二帧,第四帧又输出一个黑画面,依次循环。通过T-CON插黑的缺陷在于在输出插黑画面时,T-CON电路与源极驱动电路仍然需要进行RGB数据传输,增加了显示面板的功耗。
发明内容
本发明实施例公开了一种可插黑的显示装置,可在降低显示装置的功耗的情况下,实现插黑画面输出。
本发明实施例公开的可插黑的显示装置,包括显示屏、与所述显示屏连接的门驱动电路与源极驱动电路、伽马电路及时序控制电路,所述伽马电路包括二选一多路选择器,所述二选一多路选择器的一个输入端的输入数据为所述伽马电路输出的VCOM电压,另一个输入端的输入数据为所述伽马电路的多次可编程存储器存储的一预设值经过数模转换转换后的电压,所述时序控制电路的其中一个通用输入输出GPIO接口被配置为控制所述二选一多路选择器的输出的控制接口,在所述控制接口的控制下,所述二选一多路选择器选择输出所述伽马电路输出的VCOM电压时,所述输出的VCOM电压经所述伽马电路中的运算放大器放大后输出至所述源极驱动电路,作为所述源极驱动电路进行数模转换时所需的第一伽马参考电压,所述时序控制电路在所述源极驱动电路进行数模转换时所需的伽马参考电压为所述第一伽马参考电压时,不进行数据输出,从而实现插黑画面输出。
在一个实施例中,所述二选一多路选择器在所述控制接口的控制下,选择输出所述伽马电路的所述多次可编程存储器中所述预设值经过数模转换转换后的电压时,所述输出的经过数模转换转换后的电压经所述运算放大器放大后输出至所述源极驱动电路,作为所述源极驱动电路进行数模转换时所需的第二伽马参考电压,所述时序控制电路在所述源极驱动电路进行数模转换时所需的伽马参考电压为所述第二伽马参考电压时,传输正常画面。
在一个实施例中,所述二选一多路选择器在所述控制接口被设置为低电平时,选择输出所述伽马电路输出的VCOM电压,以及在所述控制接口被设置为高电平时,选择输出所述伽马电路的所述多次可编程存储器中所述预设值经过数模转换转换后的电压。
在一个实施例中,所述二选一多路选择器在所述控制接口被设置为高电平时,选择输出所述伽马电路输出的VCOM电压,以及在所述控制接口被设置为低电平时,选择输出所述伽马电路的所述多次可编程存储器中所述预设值经过数模转换转换后的电压。
在一个实施例中,所述时序控制电路在所述显示屏需要输出奇数帧画面时,将所述控制接口的电平设置为高电平,以及在所述显示屏需要输出偶数帧画面时,将所述控制接口的电平设置为低电平。
在一个实施例中,所述时序控制电路在所述显示屏需要输出奇数帧画面时,将所述控制接口的电平设置为低电平,以及在所述显示屏需要输出偶数帧画面时,将所述控制接口的电平设置为高电平。
与现有技术相比,本发明实施例具有以下有益效果:在时序控制电路不进行数据输出的情况下,可实现插黑画面输出,从而可降低时序控制电路与源极驱动电路的功耗,从而降低整个显示装置的功耗。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明公开的一种实施例中显示装置的结构示意图;
图2为本发明公开的第一种实施例中图1中的伽马电路的具体电路图;
图3为插黑画面输出的示意图;
图4为插黑画面输出的另一示意图;
图5为本发明公开的第二种实施例中图1中的伽马电路的具体电路图;
具体实施例
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
参考图1,本发明公开的一种实施例中的显示装置包括显示屏11、与显示屏11连接的门驱动电路12与源极驱动电路13、伽马电路14及时序控制电路15。时序控制电路15用于对门驱动电路12和源极驱动电路13的时序进行控制,以及对图片进行数字信号处理。伽马电路14用于产生源极驱动电路13需要的伽马校正的参考电压。门驱动电路12用于逐行开启TFT(TFT,薄膜晶体管)。源极驱动电路13用于将时序控制电路15处理后的图片数字信号经数模转换转换成的模拟的灰阶电压送至门驱动电路12打开的TFT中。门驱动电路12、源极驱动电路13及时序控制电路15的具体电路结构与现有技术相同,在此不再赘述。本发明相对现有技术的具体电路结构的改进主要在于伽马电路14的电路结构的改进。
图2为本发明公开的第一种实施例中伽马电路14的具体电路图。相较于现有技术,本实施例中,伽马电路14包括设置于伽马电路14的数模转换器142(在图2中以DAC来表示数模转换器142)及运算放大器143之间的二选一多路选择器141(在图2中以MUX来表示二选一多路选择器141)。选择器141的第一输入端1411的输入数据为伽马电路14输出的VCOM电压,第二输入端1412的输入数据为伽马电路14中MTP(MTP,多次可编程)存储器144中一预设值经过数模转换转换后的电压。时序控制电路141的其中一个GPIO(GPIO,通用输入输出)接口被配置为控制选择器141的输出的控制接口BlACK_EN,即选择器141的控制端与该控制接口BlACK_EN连接,在该控制接口BlACK_EN的控制下,选择器141从两个输入端的两路输入数据中选择一路数据送至选择器141的输出端。
本实施例中,时序控制电路15将控制接口BlACK_EN的电平设置为低电平时,即选择器141的控制端的电平为低电平时,选择器141选择输出第一输入端1411的输入数据,即伽马电路14输出的VCOM电压,输出的VCOM电压经运算放大器143的放大后输出至源极驱动电路13,作为源极驱动电路13进行数模转换所需的第一伽马参考电压。时序控制电路15在源极驱动电路13进行数模转换所需的伽马参考电压为上述第一伽马参考电压时,不进行数据输出,从而实现插黑画面输出。
本实施例中,在时序控制电路15不进行数据输出的情况下,可实现插黑画面输出,从而可降低时序控制电路15与源极驱动电路13的功耗,从而降低整个显示装置的功耗。
本实施例中,在控制接口BlACK_EN的电平被设置为高电平时,即选择器14的控制端的电平为高电平时,选择器141选择输出第二输入端1412的输入数据,即MTP存储器144中的该预设值经过数模转换转换后的电压,输出的经过数模转换转换后的电压经运算放大器143的放大后输出至源极驱动电路13,作为源极驱动电路13进行数模转换所需的第二伽马参考电压。时序控制电路15在源极驱动电路13进行数模转换所需的第二伽马参考电压为上述第二伽马参考电压时,传输一帧正常画面。
本实施例中,时序控制电路15在显示屏11需要输出奇数帧画面时,将控制接口BlACK_EN的电平设置为高电平,以及在显示屏11需要输出偶数帧画面时,将控制接口BlACK_EN的电平设置为低电平,从而实现图3所示的插黑画面输出的示意图。
当然,可替换地,时序控制电路15也可在显示屏11需要输出奇数帧画面时,将控制接口BlACK_EN的电平设置为低电平,以及在显示屏11需要输出偶数帧画面时,将控制接口BlACK_EN的电平设置为高电平,从而实现图4所述的插黑画面输出的示意图。
图5为本发明公开的第二种实施例中伽马电路14的具体电路图。与图2不同之处在于,本实施例中,选择器141的第一输入端1411的输入数据为伽马电路14中MTP存储器144中该预设值经过数模转换转换后的电压。第二输入端1412的输入数据为伽马电路14输出的VCOM电压。
因此,与图2不同的是,本实施例中,在时序控制电路15将控制接口BlACK_EN的电平设置为高电平,即选择器141的控制端的电平为高电平,选择器141选择输出第二输入端1412的输入数据时,输出的数据为伽马电路14输出的VCOM电压,输出的VCOM电压经运算放大器143的放大后输出至源极驱动电路13,作为源极驱动电路13进行数模转换转换所需的第一伽马参考电压。时序控制电路15在源极驱动电路13进行数模转换所需的伽马参考电压为上述第一伽马参考电压时,不进行数据输出,从而实现插黑画面输出。
在时序控制电路15将控制接口BlACK_EN的电平被设置为低电平,即选择器14的控制端的电平为低电平,选择器141选择输出第一输入端1411的输入数据时,输出的数据为MTP存储器144中一预设值经过数模转换转换后的电压,输出的经过数模转换转换后的电压经运算放大器143的放大后输出至源极驱动电路13,作为源极驱动电路13进行数模转换所需的第二伽马参考电压。时序控制电路15在源极驱动电路13进行数模转换所需的第二伽马参考电压为上述第二伽马参考电压时,传输一帧正常画面。
本实施例中,时序控制电路15可在显示屏11需要输出奇数帧画面时,将控制接口BlACK_EN的电平设置为低电平,以及在显示屏11需要输出偶数帧画面时,将控制接口BlACK_EN的电平设置为高电平,从而实现图3所示的插黑画面输出的示意图。
当然,可替换地,时序控制电路15也可在显示屏11需要输出奇数帧画面时,将控制接口BlACK_EN的电平设置为高电平,以及在显示屏11需要输出偶数帧画面时,将控制接口BlACK_EN的电平设置为低电平,从而实现图4所述的插黑画面输出的示意图。
以上所述是本发明的优选实施例,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也视为本发明的保护范围。
Claims (6)
1.一种可进行插黑的显示装置,包括显示屏、与所述显示屏连接的门驱动电路与源极驱动电路、伽马电路及时序控制电路,其特征在于,所述伽马电路包括二选一多路选择器,所述二选一多路选择器的一个输入端的输入数据为所述伽马电路输出的VCOM电压,另一个输入端的输入数据为所述伽马电路的多次可编程存储器存储的一预设值经过数模转换转换后的电压,所述时序控制电路的其中一个通用输入输出GPIO接口被配置为控制所述二选一多路选择器的输出的控制接口,所述二选一多路选择器在所述控制接口的控制下选择输出所述伽马电路输出的VCOM电压时,所述输出的VCOM电压经所述伽马电路中的运算放大器放大后输出至所述源极驱动电路,作为所述源极驱动电路进行数模转换时所需的第一伽马参考电压,所述时序控制电路在所述源极驱动电路进行数模转换时所需的伽马参考电压为所述第一伽马参考电压时,不进行数据输出,从而实现插黑画面输出。
2.如权利要求1所述的可进行插黑的显示装置,其特征在于,所述二选一多路选择器在所述控制接口的控制下,选择输出所述伽马电路的所述多次可编程存储器中的所述预设值经过数模转换转换后的电压时,所述输出的经过数模转换转换后的电压经所述运算放大器放大后输出至所述源极驱动电路,作为所述源极驱动电路进行数模转换时所需的第二伽马参考电压,所述时序控制电路在所述源极驱动电路进行数模转换时所需的伽马参考电压为所述第二伽马参考电压时,传输正常画面。
3.如权利要求2所述的可进行插黑的显示装置,其特征在于,所述二选一多路选择器在所述控制接口被设置为低电平时,选择输出所述伽马电路输出的VCOM电压,以及在所述控制接口被设置为高电平时,选择输出所述伽马电路的所述多次可编程存储器中所述预设值经过数模转换转换后的电压。
4.如权利要求2所述的可进行插黑的显示装置,其特征在于,所述二选一多路选择器在所述控制接口被设置为高电平时,选择输出所述伽马电路输出的VCOM电压,以及在所述控制接口被设置为低电平时,选择输出所述伽马电路的所述多次可编程存储器中所述预设值经过数模转换转换后的电压。
5.如权利要求3或4所述的可进行插黑的显示装置,其特征在于,所述时序控制电路在所述显示屏需要输出奇数帧画面时,将所述控制接口的电平设置为高电平,以及在所述显示屏需要输出偶数帧画面时,将所述控制接口的电平设置为低电平。
6.如权利要求3或4所述的可进行插黑的显示装置,其特征在于,所述时序控制电路在所述显示屏需要输出奇数帧画面时,将所述控制接口的电平设置为低电平,以及在所述显示屏需要输出偶数帧画面时,将所述控制接口的电平设置为高电平。
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