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CN111477170B - 使用多级插值降低oled产品中伽马线的方法 - Google Patents

使用多级插值降低oled产品中伽马线的方法 Download PDF

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CN111477170B
CN111477170B CN202010256633.4A CN202010256633A CN111477170B CN 111477170 B CN111477170 B CN 111477170B CN 202010256633 A CN202010256633 A CN 202010256633A CN 111477170 B CN111477170 B CN 111477170B
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CN111477170A (zh
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李咏柱
王冬
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Shenghe Microelectronics (Zhaoqing) Co.,Ltd.
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/90—Determination of colour characteristics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

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Abstract

本发明涉及一种使用多级插值降低OLED产品中伽马线的方法，所述多级插值方法为：设置多级插值区域：灰度值小于第一灰度值的区域为非插值区；灰度值大于等于第一灰度值且小于第二灰度值的区域为1位插值区；灰度值大于等于第二灰度值且小于第三灰度值的区域为2位插值区；灰度值大于等于第三灰度值且小于第四灰度值的区域为3位插值区；所述OLED产品中单个伽马电压块的伽马线数量G＝(第一灰度值)*1+(第二灰度值‑第一灰度值)/2+(第三灰度值‑第二灰度值)/4+(第四灰度值‑第三灰度值)/8。采用多级插值方法，可以更显著的减少伽马线的数量，最终使得OLED产品的驱动芯片的集成电路面积大大减小。

Description

使用多级插值降低OLED产品中伽马线的方法
技术领域
本发明涉及OLED产品技术领域，尤其是一种使用多级插值降低OLED产品中伽马线的方法。
背景技术
许多移动OLED产品的颜色使用24位(1670万色)的，另外还有颜色表示能力从24位增加到32位(1000M色)的。在OLED产品的驱动芯片的设计中，颜色的位数与伽马线(gammalines)的数量密切相关。
为了表示24位(即16.7M)的颜色，每个R、G、B需具有8位的颜色数，总颜色数(24位)＝R颜色数(8位)X G颜色数(8位)X B颜色数(8位)，而对应于8位的颜色数，需要256(即28)条伽马线。
如图1所示，常规的OLED驱动芯片包括通道放大器、解码器、像素数据块和伽马电压块。像素数据块的24位像素数据输出至解码器，伽马电压块的256R/G/B伽马电压输出至解码器，解码器输出至通道放大器,并将所选伽马值显示为通道放大器的输出。R/G/B每个颜色都是8位,对应的需要256*3条伽马线。这对驱动芯片的硬件面积设计较为不利，需要较大面积的芯片。
如图2所示，现有的降低OLED产品中伽马线的方法，采用一级插值方法，增加插值寄存器LSB[1:0]，插值寄存器LSB[1:0]被分配给通道放大器以应用插值。
如图4所示，X轴表示灰度，Y轴表示电压，考虑到伽马电压曲线的特性，可以设置插值区，小于灰度32的为非插值区，大于等于灰度32并且小于灰度256为2位插值区，伽马曲线稳定变化，总伽马线的数量G＝{32+(256-32)/22}*3＝88*3。
像素数据块的24位像素数据输出至解码器，伽马电压块的88R/G/B伽马电压输出至解码器，解码器输出至通道放大器,并将所选伽马值和插值寄存器LSB[1:0]的值组合显示为通道放大器的输出。
发明内容
本发明要解决的技术问题是：提供一种使用多级插值降低OLED产品中伽马线的方法，能够进一步降低伽马线的数量。
本发明解决其技术问题所采用的技术方案是：一种使用多级插值降低OLED产品中伽马线的方法，采用多级插值方法降低伽马线的数量，所述多级插值方法为：设置多级插值区域：灰度值小于第一灰度值的区域为非插值区；灰度值大于等于第一灰度值且小于第二灰度值的区域为1位插值区；灰度值大于等于第二灰度值且小于第三灰度值的区域为2位插值区；灰度值大于等于第三灰度值且小于第四灰度值的区域为3位插值区；所述OLED产品中单个伽马电压块的伽马线数量G＝(第一灰度值)*1+(第二灰度值-第一灰度值)/2+(第三灰度值-第二灰度值)/4+(第四灰度值-第三灰度值)/8。
优选的，第一灰度值设为灰度8，第二灰度值设为灰度32，第三灰度值设为灰度48，第四灰度值设为灰度256。
优选的，所述OLED产品的驱动芯片包括像素数据块、伽马电压块、解码器、通道放大器、插值寄存器LSB[2:0]，像素数据块的像素数据输出至解码器，伽马电压块的伽马电压输出至解码器，解码器输出至通道放大器，插值寄存器LSB[2:0]分配给通道放大器进行插值。
本发明的有益效果是：采用多级插值方法，可以更显著的减少伽马线的数量，最终使得OLED产品的驱动芯片的集成电路面积大大减小。
附图说明
下面结合附图对本发明进一步说明。
图1是常规的OLED产品的驱动芯片的结构原理图；
图2是采用一级插值方法的OLED产品的驱动芯片的结构原理图；
图3是采用多级插值方法的OLED产品的驱动芯片的结构原理图；
图4是采用一级插值方法的伽马曲线示意图；
图5是采用多级插值方法的伽马曲线示意图；
具体实施方式
现在结合附图对本发明作进一步的说明。这些附图均为简化的示意图仅以示意方式说明本发明的基本结构，因此其仅显示与本发明有关的构成。
本发明的优选的实施例，如图3、图5所示，一种使用多级插值降低OLED产品中伽马线的方法，所述OLED产品的驱动芯片包括像素数据块101、伽马电压块102、解码器103、通道放大器、插值寄存器LSB[2:0]。
图5中，X轴表示灰度，Y轴表示电压，考虑到OLED产品的伽玛曲线特性，优选的第一灰度值设为灰度8，第二灰度值设为灰度32，第三灰度值设为灰度48，第四灰度值设为灰度256，即灰度0至灰度7为非插值区，灰度8至灰度31为1位插值区。当伽马曲线变化稳定时，灰度32至灰度47为2位插值区。对于灰度48至灰度255为3位插值区，采用3位插值的方法实现伽马曲线。
总伽马线数量G＝{8*1+(32-8)/2+(48-32)/22+(256-48)/23}*3＝50*3。
像素数据块的24位像素数据输出至解码器，伽马电压块的50R/G/B伽马电压输出至解码器，解码器输出至通道放大器,并将所选伽马值和插值寄存器LSB[2:0]的值组合显示为通道放大器的输出。插值寄存器LSB[2:0]分配给通道放大器进行插值，R/G/B伽马电压可以降低至50线。
由此可以看出，采用多级插值方法，可以更显著的减少伽马线的数量，最终使得OLED产品的驱动芯片的集成电路面积大大减小。
以上述依据本发明的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项发明技术思想的范围内，进行多样的变更以及修改。本项发明的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。

Claims (2)

1.一种使用多级插值降低OLED产品中伽马线的方法，其特征在于：采用多级插值方法降低伽马线的数量，所述多级插值方法为：设置多级插值区域：灰度值小于第一灰度值的区域为非插值区；灰度值大于等于第一灰度值且小于第二灰度值的区域为1位插值区；灰度值大于等于第二灰度值且小于第三灰度值的区域为2位插值区；灰度值大于等于第三灰度值且小于第四灰度值的区域为3位插值区；所述OLED产品中单个伽马电压块的伽马线数量G＝(第一灰度值)*1+(第二灰度值-第一灰度值)/2+(第三灰度值-第二灰度值)/4+(第四灰度值-第三灰度值)/8；
所述OLED产品的驱动芯片包括像素数据块、伽马电压块、解码器、通道放大器、插值寄存器LSB[2:0]，像素数据块的像素数据输出至解码器，伽马电压块的伽马电压输出至解码器，解码器输出至通道放大器，插值寄存器LSB[2:0]分配给通道放大器进行插值。
2.根据权利要求1所述的使用多级插值降低OLED产品中伽马线的方法，其特征在于：第一灰度值设为灰度8，第二灰度值设为灰度32，第三灰度值设为灰度48，第四灰度值设为灰度256。
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CN106846273A (zh) * 2017-01-23 2017-06-13 上海兴芯微电子科技有限公司 一种Gamma校正的方法及装置
CN110827739A (zh) * 2018-08-14 2020-02-21 美格纳半导体有限公司 显示装置及其驱动方法

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CN103617780A (zh) * 2013-12-06 2014-03-05 北京航空航天大学 Amoled显示屏驱动电路及其非线性插值构造方法
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