CN107068062A - 一种图像串扰补偿方法、装置及显示设备 - Google Patents
一种图像串扰补偿方法、装置及显示设备 Download PDFInfo
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Abstract
本发明提供一种图像串扰补偿方法、装置及显示设备,涉及显示技术领域,用以改善由于信号耦合导致的图像串扰现象。本发明的图像串扰补偿方法,包括:获取当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压之间的数据电压变化值;根据所述数据电压变化值确定电源电压变化值;根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压;利用所述补偿后的数据电压,作为所述下一时刻施加于所述像素单元的实际数据电压。由于在本发明实施例中可对施加于像素单元的数据电压进行补偿,因而,本发明实施例改善了由于信号耦合导致的图像串扰现象。
Description
技术领域
本发明涉及显示技术领域,尤其涉及一种图像串扰补偿方法、装置及显示设备。
背景技术
OLED(Organic Light Emitting Display,有机发光二极管显示装置)显示装置按照驱动方式可以分为无源矩阵型OLED(Passive Matrix OLED,PMOLED)和有源矩阵型OLED(Active Matrix OLED,AMOLED)两大类。
其中,AMOLED显示产品为电流驱动器件,它的OLED器件的显示亮度与电流的大小有关。而流过OLED器件的电流,受到DTFT的控制,即:I~|Vgs-Vth|2成正比关系,其中I表示流过OLED器件的电流,Vgs表示栅源电压,Vth表示阈值电压。通常,Vs的大小取值为ELVDD,而Vg的大小取值为Vdata,所以AMOLED的显示亮度与|ELVDD-Vdata|2相关。
然而,在设计面板(panel)时,难免会出现信号走线的交叉,这就会导致出现信号耦合的问题,因而产生图像串扰。
发明内容
有鉴于此,本发明实施例提供一种数图像串扰补偿方法、装置及显示设备,以改善由于信号耦合导致的图像串扰现象。
为解决上述技术问题,本发明实施例提供一种图像串扰补偿方法,包括:
获取当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压之间的数据电压变化值;
根据所述数据电压变化值确定电源电压变化值;
根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压;
利用所述补偿后的数据电压,作为所述下一时刻施加于所述像素单元的实际数据电压。
进一步的,所述根据所述数据电压变化值确定电源电压变化值的步骤,包括:
获取耦合参数;
将所述数据电压变化值和所述耦合参数的乘积,作为所述电源电压变化值。
进一步的,所述获取耦合参数包括:
通过对施加于所述像素单元的数据电压跳变进行测试,获取所述耦合参数。
进一步的,所述根据所述数据电压变化值确定电源电压变化值的步骤,包括:
分别获取所述像素单元的N个邻近像素单元在当前扫描时刻和上一扫描时刻之间的数据电压变化值、耦合参数、权重值;N为自然数;
对于所述N个邻近像素单元,计算每个邻近像素单元的数据电压变化值、耦合参数、权重值的乘积,获得每个邻近像素单元的参考数据电压变化值;
将每个邻近像素单元的参考数据电压变化值的和,作为所述电源电压变化值。
进一步的,所述根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压的步骤,包括:
将所述原始数据电压和所述电源电压变化值的和,作为所述补偿后的数据电压。
第二方面,本发明实施例提供一种图像串扰补偿装置,包括:
第一获取模块,用于获取当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压之间的数据电压变化值;
确定模块,用于根据所述数据电压变化值确定电源电压变化值;
第二获取模块,用于根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压;
电压补偿模块,用于利用所述补偿后的数据电压,作为所述下一时刻施加于所述像素单元的实际数据电压。
进一步的,所述确定模块包括:
参数获取子模块,用于获取耦合参数;
确定子模块,用于将所述数据电压变化值和所述耦合参数的乘积,作为所述电源电压变化值。
进一步的,所述参数获取子模块具体用于,通过对施加于所述像素单元的数据电压跳变进行测试,获取所述耦合参数。
进一步的,所述确定模块包括:
参数获取子模块,用于分别获取所述像素单元的N个邻近像素单元在当前扫描时刻和上一扫描时刻之间的数据电压变化值、耦合参数、权重值;N为自然数;
计算子模块,用于对于所述N个邻近像素单元,计算每个邻近像素单元的数据电压变化值、耦合参数、权重值的乘积,获得每个邻近像素单元的参考数据电压变化值;
确定子模块,用于将每个邻近像素单元的参考数据电压变化值的和,作为所述电源电压变化值。
进一步的,所述第二获取模块具体用于,将所述原始数据电压和所述电源电压变化值的和,作为所述补偿后的数据电压。
第三方面,本发明实施例提供一种显示设备,所述显示设备包括第一方面所述的图像串扰补偿装置。
本发明的上述技术方案的有益效果如下:
在本发明实施例中,根据当前扫描时刻和上一扫描时刻的数据电压之间的变化值,确定电源电压变化值,并根据电源电压变化值获得补偿后的数据电压,从而利用补偿后的数据电压作为下一时刻施加于所述像素单元的实际数据电压。由于在本发明实施例中可对施加于像素单元的数据电压进行补偿,从而改善了由于信号耦合导致的图像串扰现象。
附图说明
图1为本发明实施例的图像串扰补偿方法的流程图;
图2为本发明实施例中邻近像素单元的示意图;
图3为本发明实施例的图像串扰补偿装置的示意图;
图4为本发明实施例中确定模块的第一示意图;
图5为本发明实施例中确定模块的第二示意图。
具体实施方式
下面将结合附图和实施例,对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明,但不用来限制本发明的范围。
如图1所示,本发明实施例的图像串扰补偿方法,包括:
步骤101、获取当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压之间的数据电压变化值。
在此步骤中,获取当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压,并利用上一扫描时刻施加于所述像素单元的数据电压和当前扫描时刻施加于像素单元的数据电压之差,作为数据电压变化值。
具体的,ΔVdata=Vdata(t1)-Vdata(t0)
其中,Vdata(t0)是上一扫描时刻施加于所述像素单元的数据电压,Vdata(t1)是当前扫描时刻施加于像素单元的数据电压,ΔVdata为数据电压变化值。
步骤102、根据所述数据电压变化值确定电源电压变化值。
在此步骤中,可获取耦合参数,将所述数据电压变化值和所述耦合参数的乘积,作为所述电源电压变化值。通过测试产品信号耦合的特性,可得到耦合参数XGain的函数关系式。
在实际应用中,该耦合参数还可通过对施加于所述像素单元的数据电压跳变进行测试获得。该耦合参数还可能与相邻像素单元的数据电压变化值相关。
具体的,为了进一步改善交叉走线而带来的串扰现象,在此步骤中,分别获取所述像素单元的N个(N为自然数)邻近像素单元在当前扫描时刻和上一扫描时刻之间的数据电压变化值、耦合参数、权重值。对于所述N个邻近像素单元,计算每个邻近像素单元的数据电压变化值、耦合参数、权重值的乘积,获得每个邻近像素单元的参考数据电压变化值。将每个邻近像素单元的参考数据电压变化值的和,作为所述电源电压变化值。
其中,所述邻近像素单元指的是与像素单元位于同一像素行且位置相邻的像素单元。对于某个像素单元来说,通常可选择其附近的3-5个位于同一像素行的相邻的像素单元作为邻近像素单元。
具体的,如图2所示,对于像素单元1(Pixel_1)来讲,它的邻近像素单元分别为与其位于同一像素行上的像素单元2(Pixel_2),像素单元3(Pixel_3)和像素单元4(Pixel_4)。在本发明实施例中,相对位置越近的邻近像素单元的数据电压变化对ELVDD产生的耦合影响越大,其权重也可设置的越大。
对于像素单元1的电源电压变化值,可按照下述公式(2)计算:ΔVELVDD_1=XGain_1×ΔVdata_1+a1×XGain_2×ΔVdata_2+a2×XGain_3×ΔVdata_3+a3×XGain_4×ΔVdata_4
其中,ΔVELVDD_1为ELVDD电源电压变化值;ΔVdata_1为像素单元1的数据电压变化量;XGain_1为像素单元1的耦合参数;ΔVdata_2~ΔVdata_4为像素单元2-像素单元4的数据电压变化量;XGain_2~XGain_4为像素单元2-像素单元4的耦合参数;a1~a3为像素单元2-像素单元4的权重值。
步骤103、根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压。
所述原始数据电压指的是预先设置的预计施加于所述像素单元的数据电压。在此步骤中,将所述原始数据电压和所述电源电压变化值的和,作为所述补偿后的数据电压。
步骤104、利用所述补偿后的数据电压,作为所述下一时刻施加于所述像素单元的实际数据电压。
在实际应用中,如前所述,AMOLED的显示亮度与|ELVDD-Vdata|2相关。那么,在本发明实施例中,通过对施加于像素单元的数据电压进行补偿来改善由于信号耦合导致的图像串扰现象。
对于某个像素单元来讲,当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压之间的差值为:
ΔVdata=Vdata(t1)-Vdata(t0)
根据获取的耦合参数,可得出电源电压变化值:
ΔVELVDD=XGain×ΔVdata
而ΔVELVDD=VELVDD’—VELVDD=VELVDD’—XGain×ΔVdata。
其中,VELVDD’表示发生耦合现象时的电源电压,VELVDD表示实际的电源电压。
那么,根据上述显示亮度与|ELVDD-Vdata|2的关系,可得出:
|ELVDD’—Vdata’|=|VELVDD—Vdata|=|VELVDD+ΔVELVDD–Vdata’|
由于数据电压的变化为具有单一变化方向的曲线(非抛物线变化),所以:
VELVDD–Vdata=VELVDD+ΔVELVDD–Vdata’,
进而可得出:
Vdata’=Vdata+ΔELVDD。
其中,Vdata’为补偿后的数据电压,Vdata为原始数据电压,ΔELVDD为电源电压变化值。
那么在下一扫描时刻,利用补偿后的数据电压作为施加于该像素单元的实际数据电压,以改善串扰现象。
在具体应用中,可将上述实施例的算法置于驱动芯片内,通过带有补偿算法的IC点亮AMOLED显示模组,补偿图像串扰问题。
在本发明实施例中,根据当前扫描时刻和上一扫描时刻的数据电压之间的变化值,确定电源电压变化值,并根据电源电压变化值获得补偿后的数据电压,从而利用补偿后的数据电压作为下一时刻施加于所述像素单元的实际数据电压。由于在本发明实施例中可对施加于像素单元的数据电压进行补偿,从而改善了由于信号耦合导致的图像串扰现象。
如图3所示,本发明实施例的图像串扰补偿装置,包括:
第一获取模块301,用于获取当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压之间的数据电压变化值;确定模块302,用于根据所述数据电压变化值确定电源电压变化值;第二获取模块303,用于根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压;电压补偿模块304,用于利用所述补偿后的数据电压,作为所述下一时刻施加于所述像素单元的实际数据电压。
其中,如图4所示,所述确定模块302包括:
参数获取子模块3021,用于获取耦合参数;确定子模块3022,用于将所述数据电压变化值和所述耦合参数的乘积,作为所述电源电压变化值。
具体的,所述参数获取子模块具体用于,通过对施加于所述像素单元的数据电压跳变进行测试,获取所述耦合参数。
其中,如图5所示,所述确定模块302包括:
参数获取子模块3023,用于分别获取所述像素单元的N个邻近像素单元在当前扫描时刻和上一扫描时刻之间的数据电压变化值、耦合参数、权重值;计算子模块3024,用于对于所述N个邻近像素单元,计算每个邻近像素单元的数据电压变化值、耦合参数、权重值的乘积,获得每个邻近像素单元的参考数据电压变化值;确定子模块3025,用于将每个邻近像素单元的参考数据电压变化值的和,作为所述电源电压变化值。
在实际应用中,所述第二获取模块303具体用于,将所述原始数据电压和所述电源电压变化值的和,作为所述补偿后的数据电压。
本发明所述装置的工作原理可参照前述方法实施例的描述。
在本发明实施例中,根据当前扫描时刻和上一扫描时刻的数据电压之间的变化值,确定电源电压变化值,并根据电源电压变化值获得补偿后的数据电压,从而利用补偿后的数据电压作为下一时刻施加于所述像素单元的实际数据电压。由于在本发明实施例中可对施加于像素单元的数据电压进行补偿,从而改善了由于信号耦合导致的图像串扰现象。
本发明实施例还提供了一种显示设备,所述显示设备包括图3-图5任一所示的图像串扰补偿装置。
以上所述是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明所述原理的前提下,还可以作出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (11)
1.一种图像串扰补偿方法,其特征在于,包括:
获取当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压之间的数据电压变化值;
根据所述数据电压变化值确定电源电压变化值;
根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压;
利用所述补偿后的数据电压,作为所述下一时刻施加于所述像素单元的实际数据电压。
2.根据权利要求1所述的方法,其特征在于,所述根据所述数据电压变化值确定电源电压变化值的步骤,包括:
获取耦合参数;
将所述数据电压变化值和所述耦合参数的乘积,作为所述电源电压变化值。
3.根据权利要求2所述的方法,其特征在于,所述获取耦合参数包括:
通过对施加于所述像素单元的数据电压跳变进行测试,获取所述耦合参数。
4.根据权利要求1所述的方法,其特征在于,所述根据所述数据电压变化值确定电源电压变化值的步骤,包括:
分别获取所述像素单元的N个邻近像素单元在当前扫描时刻和上一扫描时刻之间的数据电压变化值、耦合参数、权重值;N为自然数;
对于所述N个邻近像素单元,计算每个邻近像素单元的数据电压变化值、耦合参数、权重值的乘积,获得每个邻近像素单元的参考数据电压变化值;
将每个邻近像素单元的参考数据电压变化值的和,作为所述电源电压变化值。
5.根据权利要求1所述的方法,其特征在于,所述根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压的步骤,包括:
将所述原始数据电压和所述电源电压变化值的和,作为所述补偿后的数据电压。
6.一种图像串扰补偿装置,其特征在于,包括:
第一获取模块,用于获取当前扫描时刻施加于像素单元的数据电压和上一扫描时刻施加于所述像素单元的数据电压之间的数据电压变化值;
确定模块,用于根据所述数据电压变化值确定电源电压变化值;
第二获取模块,用于根据所述电源电压变化值和下一时刻预计施加于所述像素单元的原始数据电压,获得补偿后的数据电压;
电压补偿模块,用于利用所述补偿后的数据电压,作为所述下一时刻施加于所述像素单元的实际数据电压。
7.根据权利要求6所述的装置,其特征在于,所述确定模块包括:
参数获取子模块,用于获取耦合参数;
确定子模块,用于将所述数据电压变化值和所述耦合参数的乘积,作为所述电源电压变化值。
8.根据权利要求7所述的装置,其特征在于,所述参数获取子模块具体用于,通过对施加于所述像素单元的数据电压跳变进行测试,获取所述耦合参数。
9.根据权利要求6所述的装置,其特征在于,所述确定模块包括:
参数获取子模块,用于分别获取所述像素单元的N个邻近像素单元在当前扫描时刻和上一扫描时刻之间的数据电压变化值、耦合参数、权重值;N为自然数;
计算子模块,用于对于所述N个邻近像素单元,计算每个邻近像素单元的数据电压变化值、耦合参数、权重值的乘积,获得每个邻近像素单元的参考数据电压变化值;
确定子模块,用于将每个邻近像素单元的参考数据电压变化值的和,作为所述电源电压变化值。
10.根据权利要求6所述的装置,其特征在于,所述第二获取模块具体用于,将所述原始数据电压和所述电源电压变化值的和,作为所述补偿后的数据电压。
11.一种显示设备,其特征在于,所述显示设备包括权利要求6-10任一项所述的图像串扰补偿装置。
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