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CN114882814A - 一种应用于可挠性面板的边缘区域亮度补偿方法 - Google Patents

一种应用于可挠性面板的边缘区域亮度补偿方法 Download PDF

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CN114882814A
CN114882814A CN202210330198.4A CN202210330198A CN114882814A CN 114882814 A CN114882814 A CN 114882814A CN 202210330198 A CN202210330198 A CN 202210330198A CN 114882814 A CN114882814 A CN 114882814A
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戴凯易
何季阳
秦良
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Sheng Microelectronics Suzhou Co ltd
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Sheng Microelectronics Suzhou Co ltd
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/03Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays
    • G09G3/035Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays for flexible display surfaces
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen

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Abstract

本发明提出了一种应用于可挠性面板的边缘区域亮度补偿方式,在面板弯折处的显示像素在因角度导致人眼视觉上会与非弯折显示区(Normal Display Area)亮度有差异,因此需要对该区域亮度做补偿,补偿方法以面板弯折显示区(Partial Display Area)的像素范围之宽度(W)与高度(H)做为参考,透过实际面板像素大小扣除面板弯折区域面积取得补偿区域范围之相对位置后﹐再判断像素是否符合补偿区域范围,以伽玛(Gamma)调整为基础,建立一组针对面板弯折区显示像素的亮度调整方式。

Description

一种应用于可挠性面板的边缘区域亮度补偿方法
技术领域
本发明是关于一种面板显示方法,且特别是有关于一种应用于可挠性面板的边缘区域亮度补偿方式。
背景技术
折叠式手机在AMOLED市场日渐成熟,考虑到实际机构设计需求和可挠性面板具有可挠曲的特性,因此显示器的模样更加灵活,使得弯曲屏幕成为一种趋势和流行。另外,可挠性面板还具有轻薄、耐冲击的特性,特别适用于移动电话、平板电脑或笔记型电脑等可携式产品中。一般来说,可挠性面板在弯曲或折迭时,其弯曲的角度会造成面板显示影像的形变,在这样的情况下,除了影响影像显示的品质,亦有可能会影响触控的准确性。
现有方法采用角度传感器的方式对可挠性面板最后弯曲的角度测量,并根据测量的角度差值进行相应图像校正和图像重建,再投射到显示器上。然而,这样的做法通常重建的积累时间长,反应慢,也会使得某些软件计算失误导致可挠性面板的过渡区域会出现明显的线段,导致使用者在使用可挠式显示器时,无法即时看到修正后的影像以及影响使用观感。
发明内容
本发明提供一种应用于可挠性面板的边缘区域亮度补偿方式,提出针对面板弯折区域实现伽玛(Gamma)亮度补偿方法,所述方法包含以下步骤:
步骤1,定义补偿区域,即面板弯折区域的宽度为W,面板弯折区域的高度为H;
定义过渡区域,即面板过渡区域的宽度为W2,面板过渡区域的高度为H;
步骤2,计算补偿区域范围;
步骤3,判断是否在补偿区域范围和判断是否在过渡区域范围;
步骤4,过渡区域范围补偿,
步骤5,将步骤3、4所获得之补偿区域内的所有像素数据R/G/B_partial_out以及R/G/B_partial_W2_out透过LUT(Look Up Table)实现Digital Gamma Correction(DGC)。
进一步地,所述步骤2中补偿区域范围以像素位置为计算方式,定义如下:
Partial_Area_Left_X_Start=1
Partial_Area_Left_X_End=W
Partial_Area_Right_X_Start=P_H_W-W
Partial_Area_Right_X_End=P_H_W,
所述P_H_W为Panel_Horizontal_Width的简称。
进一步地,所述步骤3包括以像素水平方向位置判定是否在补偿区域范围内,判定方式是以输入R/G/B_partial_in之水平方向位置是否落在以下区间为准决定是否将进行弯折区域亮度补偿:
R/G/B_partial_in∈[Partial_Area_Left_X_Start,Partial_Area_Left_X_End]
or
R/G/B_partial_in∈[Partial_Area_Right_X_Start,Partial_Area_Right_X_End]。
进一步地,在针对弯折区域亮度补偿前,所述步骤3还包括弯折区与非弯折区之间的周边像素判别与处理,即所述过渡区域,判断是否在过渡区域范围,是以输入R/G/B_partial_In之水平方向位置是否落在以下区间为依据,如果落入则在所述过渡区域范围,如果不落入则不在所述过渡区域范围:
Figure BDA0003575194240000024
进一步地,以Data_W2定义为弯折区与非弯折区的输入Data同为255时的参考点,以W255_Luv_Normal定义为非弯折区的最大亮度(单位为nit),以W255_Luv_Partial定义为弯折区的最大亮度(单位为nit),依比例关系获得Data_Gain:
Figure BDA0003575194240000021
进一步地,以线性内插法取得补偿系数Gain_Set:
公式如下:
Figure BDA0003575194240000022
Figure BDA0003575194240000023
其中:
x0=Partial_Area_Left_X_End or Partial_Area_Right_X_Start
y0=Data_Gain
x1=Partial_Area_Left_X_End-W2 or Partial_Area_Right_X_Start+W2
y1=1
x=R/G/B_Partial_W2_in,
由公式(3)所获得的Gain_Set作为所述过渡区域的比例补偿系数:
R/G/B_Partial_W2_out_x=R/G/B_Partial_W2_in×Gain_Set。
进一步地,所述步骤5包括:
LUT(Look Up Table)是以8bit R/G/B_partial_out与Gamma电压对应的关系,建立25个绑点(BoudX),那么其余231个点以线性内插法取得补偿后,实现Digital GammaCorrection亮度调整。
附图说明
图1所示是本发明的方法实现流程图(Flow Chart);
图2所示为本发明的面板弯曲区域示意图(Schematic View of Bending Area ofPanel);
图3所示为本发明的补偿范围位置示意图(Schematic diagram of thelocation);
图4所示为本发明的当前像素位置判断流程图(Current Pixel of LocationJudgment Flow Chart);
图5所示为本发明的弯折区与非弯折区之数据增益计算(Data Gain of NormalLUT V.S Partial LUT);
图6所示为本发明的线性内插(Linear interpolation);
图7所示为本发明的绑点与加玛电压对应关系(LUT&BoudX Setting);
图8所示为本发明非弯折显示区与弯折显示区之加玛曲线(Gamma Curve)。
具体实施方式
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。
请参见图1-8,本发明提供一种应用于可挠性面板的边缘区域亮度补偿方式,提出针对面板弯折区域实现伽玛(Gamma)亮度补偿方法,参见图1,包含以下步骤:
步骤1,定义补偿区域,即面板弯折区域的宽度为W,面板弯折区域的高度为H;
定义过渡区域,即面板过渡区域的宽度为W2,面板过渡区域的高度为H;
步骤2,计算补偿区域范围;
步骤3,判断是否在补偿区域范围和判断是否在过渡区域范围;
步骤4,过渡区域范围补偿,
步骤5,将步骤3、4所获得之补偿区域内的所有像素数据R/G/B_partial_out以及R/G/B_partial_W2_out透过LUT(Look Up Table)实现Digital Gamma Correction(DGC)。
参见图2-3,因补偿区域范围高度(H)与Panel_Vertical_Width相同,仅需考虑补偿范围左右两侧水平方向的起始位置与终止位置如图3所示,补偿区域范围以像素位置为计算方式:
Partial_Area_Left_X_Start=1
Partial_Area_Left_X_End=W
Partial_Area_Right_X_Start=P_H_W-W
Partial_Area_Right_X_End=P_H_W,
所述P_H_W为Panel_Horizontal_Width的简称。
以像素水平方向位置判定是否为补偿区域范围内,判断关系式如图4所示,判定方式是以输入R/G/B_partial_in之水平方向位置是否落在以下区间为准决定是否将进行弯折区域亮度补偿:
R/G/B_partial_in∈[Partial_Area_Left_X_Start,Partial_Area_Left_X_End]
or
R/G/B_partial_in∈[Partial_Area_Right_X_Start,Partial_Area_Right_X_End]。
在针对弯折区域亮度补偿前,须考虑弯折区与非弯折区的周边像素判别与处理,使得过渡区域不会出现明显的线段,判断是否在过渡区域范围,是以输入R/G/B_partial_In之水平方向位置是否落在以下区间为依据,如果落入则在所述过渡区域范围,如果不落入则不在所述过渡区域范围:
Figure BDA0003575194240000041
参见图5,为避免过渡区域出现线段,以Data_W2定义为弯折区与非弯折区的输入Data同为255时的参考点,以W255_Luv_Normal定义为非弯折区的最大亮度(单位为nit),以W255_Luv_Partial定义为弯折区的最大亮度(单位为nit),依比例关系获得Data_Gain:
Figure BDA0003575194240000051
参见图6,再以线性内插法取得补偿系数Gain_Set:
公式如下:
Figure BDA0003575194240000052
Figure BDA0003575194240000053
其中:
x0=Partial_Area_Left_X_End or Partial_Area_Right_X_Start
y0=Data_Gain
x1=Partial_Area_Left_X_End-W2 or Partial_Area_Right_X_Start+W2
y1=1
x=R/G/B_Partial_W2_in,
由公式(3)所获得的Gain_Set作为所述过渡区域的比例补偿系数:
R/G/B_Partial_W2_out_x=R/G/B_Partial_W2_in×Gain_Set。
将步骤3、4所获得之补偿区域内的所有像素数据R/G/B_partial_out以及R/G/B_partial_W2_out透过LUT(Look Up Table)实现Digital Gamma Correction(DGC):
假设以8bit R/G/B_partial_out与Gamma电压对应之关系,建立25个绑点(BoudX)如图7所示,其余231点以线性内插获得后,实现Digital Gamma Correction亮度调整方式。
参见图8,假设非弯折显示区(Normal Display Area)最大亮度值为600nit,且gamma系数为2.2,如蓝色线段(在下)所示;橘色线段(在上)所示是以最大亮度值为700nit且gamma系数为2.2来做DGC亮度补偿调整后的弯折显示区(Partial Display Area),整体亮度提升17%以上。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限制。

Claims (7)

1.一种应用于可挠性面板的边缘区域亮度补偿方法,其特征在于,包括以下步骤:
步骤1,定义补偿区域,即面板弯折区域的宽度为W,面板弯折区域的高度为H;
定义过渡区域,即面板过渡区域的宽度为W2,面板过渡区域的高度为H;
步骤2,计算补偿区域范围;
步骤3,判断是否在补偿区域范围和判断是否在过渡区域范围;
步骤4,过渡区域范围补偿,
步骤5,将步骤3、4所获得之补偿区域内的所有像素数据R/G/B_partial_out以及R/G/B_partial_W2_out透过LUT(Look Up Table)实现DigitalGamma Correction(DGC)。
2.根据权利要求1所述的一种应用于可挠性面板的边缘区域亮度补偿方法,其特征在于,所述步骤2中补偿区域范围以像素位置为计算方式,定义如下:
Partial_Area_Left_X_Start=1
Partial_Area_Left_X_End=W
Partial_Area_Right_X_Start=P_H_W-W
Partial_Area_Right_X_End=P_H_W,
所述P_H_W为Panel_Horizontal_Width的简称。
3.根据权利要求1所述的一种应用于可挠性面板的边缘区域亮度补偿方法,其特征在于,所述步骤3包括以像素水平方向位置判定是否在补偿区域范围内,判定方式是以输入R/G/B_partial_in之水平方向位置是否落在以下区间为准决定是否将进行弯折区域亮度补偿:
R/G/B_partial_in∈[Partial_Area_Left_X_Start,Partial_Area_Left_X_End]
or
R/G/B_partial_in∈[Partial_Area_Right_X_Start,Partial_Area_Right_X_End]。
4.根据权利要求3所述的一种应用于可挠性面板的边缘区域亮度补偿方法,其特征在于,在针对弯折区域亮度补偿前,所述步骤3还包括弯折区与非弯折区之间的周边像素判别与处理,即所述过渡区域,判断是否在过渡区域范围,是以输入R/G/B_partial_In之水平方向位置是否落在以下区间为依据,如果落入则在所述过渡区域范围,如果不落入则不在所述过渡区域范围:
Figure FDA0003575194230000011
5.根据权利要求4所述的一种应用于可挠性面板的边缘区域亮度补偿方法,其特征在于,以Data_W2定义为弯折区与非弯折区的输入Data同为255时的参考点,以W255_Luv_Normal定义为非弯折区的最大亮度(单位为nit),以W255_Luv_Partial定义为弯折区的最大亮度(单位为nit),依比例关系获得Data_Gain:
Figure FDA0003575194230000021
6.根据权利要求5所述的一种应用于可挠性面板的边缘区域亮度补偿方法,其特征在于,以线性内插法取得补偿系数Gain_Set:
公式如下:
Figure FDA0003575194230000022
Figure FDA0003575194230000023
其中:
x0=Partial_Area_Left_X_End or Partial_Area_Right_X_Start
y0=Data_Gain
x1=Partial_Area_Left_X_End-W2 or Partial_Area_Right_X_Start+W2
y1=1
x=R/G/B_Partial_W2_in,
由公式(3)所获得的Gain_Set作为所述过渡区域的比例补偿系数:
R/G/B_Partial_W2_out_x=R/G/B_Partial_W2_in×Gain_Set。
7.根据权利要求6所述的一种应用于可挠性面板的边缘区域亮度补偿方法,其特征在于,所述步骤5包括:
LUT(Look Up Table)是以8bit R/G/B_partial_out与Gamma电压对应的关系,建立25个绑点(BoudX),那么其余231个点以线性内插法取得补偿后,实现Digital GammaCorrection亮度调整。
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