CN103594065A - 珈玛电压调整装置的调整方法 - Google Patents

珈玛电压调整装置的调整方法 Download PDF

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CN103594065A
CN103594065A CN201310553975.2A CN201310553975A CN103594065A CN 103594065 A CN103594065 A CN 103594065A CN 201310553975 A CN201310553975 A CN 201310553975A CN 103594065 A CN103594065 A CN 103594065A
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郭东胜
戴叶
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/233,158 priority patent/US9305502B2/en
Priority to DE112013005374.8T priority patent/DE112013005374T5/de
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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
    • G09G3/20Control 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3614Control of polarity reversal in general
    • 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/08Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0673Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

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Abstract

本发明涉及一种珈玛电压调整装置的调整方法,所述珈玛电压调整装置用于提供一液晶面板显示N组灰阶且包括一印刷电路板装配以及一珈玛电压微调单元。所述珈玛电压调整装置的调整方法包括:所述印刷电路板装配产生N+2组珈玛电压;所述N+2组珈玛电压输入到所述珈玛电压微调单元;以及所述珈玛电压微调单元根据所述N+2组珈玛电压产生相互对称的负极性驱动电压与正极性驱动电压。本发明通过将现有技术中所需的2N组珈玛电压降低为N+2组,减少印刷电路板装配上珈玛集成电路的数量以节省成本。

Description

珈玛电压调整装置的调整方法
技术领域
本发明涉及调整方法,特别是涉及一种珈玛电压调整装置的调整方法。
背景技术
于液晶显示装置中,珈玛(gamma)电压的调整主要有两种方式,第一种方式是通过硬件调整电压,第二种方式是通过软件,例如时序控制器(Timing Controller;T-con)调整数据。请参阅图1及图2,图1为现有技术中通过硬件调整珈玛电压的示意图,图2为现有技术中珈玛电压与穿透率(transmittance)的关系图。以N为256灰阶为例,首先由一印刷电路板装配10(PrintedCircuit Board Assembly;PCBA)上产生2N组珈玛电压,其包括N组负极性珈玛电压GMA1-GMAN及N组正极性珈玛电压GMAN+1-GMA2N,所述N组负极性珈玛电压GMA1-GMAN以及所述N组正极性珈玛电压GMAN+1-GMA2N输入到一数据芯片12,数据芯片12根据所述N组负极性珈玛电压GMA1-GMAN产生256组负极性驱动电压V255-V0,并根据所述N组正极性珈玛电压GMAN+1-GMA2N产生256组正极性驱动电压V0’-V255’,负极性驱动电压V255-V0及正极性驱动电压V0’-V255’用于驱动画素显示256灰阶之其中一者。
从图2可知,N组负极性珈玛电压GMA1-GMAN及N组正极性珈玛电压GMAN+1-GMA2N为成对出现,亦即每一个灰阶由两个珈玛电压(一个负极性珈玛电压及一个正极性珈玛电压)控制,藉以调整灰阶接近标准伽玛曲线及保证图2中N组负极性珈玛电压GMA1-GMAN及N组正极性珈玛电压GMAN+1-GMA2N相对于共同电压VCOM的对称性。调整灰阶接近标准伽玛曲线可以通过调整数据芯片12来达成。保证N组负极性珈玛电压GMA1-GMAN及N组正极性珈玛电压GMAN+1-GMA2N相对于共同电压VCOM的对称性则需要通过印刷电路板装配10产生2N组珈玛电压达成。由于印刷电路板装配10是通过珈玛集成电路(Gamma Integrated Circuit;GammaIC)产生2N组珈玛电压,因此产生2N组珈玛电压所需使用的珈玛集成电路是成本上的负担。
因此需要对现有技术中无法降低珈玛集成电路的数量导致成本无法降低的问题提出解决方法。
发明内容
本发明的目的在于提供一种珈玛电压调整装置的调整方法,其能降低珈玛集成电路的数量以降低成本。
为解决上述问题,本发明提供的一种珈玛电压调整装置的调整方法中,所述珈玛电压调整装置用于提供一液晶面板显示N组灰阶且包括一印刷电路板装配以及一珈玛电压微调单元。所述珈玛电压调整装置的调整方法包括:所述印刷电路板装配产生N+2组珈玛电压,所述N+2组珈玛电压包括2组负极性珈玛电压以及N组正极性珈玛电压,所述2组负极性珈玛电压分别对应至一最高灰阶以及一最低灰阶,所述N组正极性珈玛电压分别对应至所述N组灰阶;所述2组负极性珈玛电压及所述N组正极性珈玛电压输入到所述珈玛电压微调单元;以及所述珈玛电压微调单元根据所述2组负极性珈玛电压产生M组或N组负极性驱动电压,并根据所述N组正极性珈玛电压产生N组正极性驱动电压,M小于或等于N。
在本发明的珈玛电压调整装置的调整方法中,所述珈玛电压微调单元包括若干个电阻,所述珈玛电压微调单元通过这些电阻进行分压以产生所述负极性驱动电压及所述正极性驱动电压。
在本发明的珈玛电压调整装置的调整方法中,所述珈玛电压微调单元根据所述2组负极性珈玛电压直接产生所述N组负极性驱动电压以与所述N组正极性驱动电压对称。
在本发明的珈玛电压调整装置的调整方法中,所述珈玛电压微调单元根据所述2组负极性珈玛电压产生M组负极性驱动电压,再由一时序控制器将所述M组负极性驱动电压调整为与所述N组正级性驱动电压对称的N组负级性驱动电压。
为解决上述问题,本发明提供的一种珈玛电压调整装置的调整方法中,所述珈玛电压调整装置用于提供一液晶面板显示N组灰阶且包括一印刷电路板装配以及一珈玛电压微调单元。所述珈玛电压调整装置的调整方法包括:所述印刷电路板装配产生N+2组珈玛电压,所述N+2组珈玛电压包括2组正极性珈玛电压以及N组负极性珈玛电压,所述2组正极性珈玛电压分别对应至一最高灰阶以及一最低灰阶,所述N组负极性珈玛电压分别对应至所述N组灰阶;所述2组正极性珈玛电压及所述N组负极性珈玛电压输入到所述珈玛电压微调单元;以及所述珈玛电压微调单元根据所述2组正极性珈玛电压产生M组或N组正极性驱动电压,并根据所述N组负极性珈玛电压产生N组负极性驱动电压,M小于或等于N。
在本发明的珈玛电压调整装置的调整方法中,所述珈玛电压微调单元包括若干个电阻,所述珈玛电压微调单元通过这些电阻进行分压以产生所述负极性驱动电压及所述正极性驱动电压。
在本发明的珈玛电压调整装置的调整方法中,所述珈玛电压微调单元根据所述2组正极性珈玛电压直接产生所述N组正极性驱动电压以与所述N组负极性驱动电压对称。
在本发明的珈玛电压调整装置的调整方法中,所述珈玛电压微调单元根据所述2组正极性珈玛电压产生M组正极性驱动电压,再由一时序控制器将所述M组正极性驱动电压调整为与所述N组负级性驱动电压对称的N组正级性驱动电压。
相较于现有技术,本发明的珈玛电压调整装置的调整方法通过将现有技术中所需的2N组珈玛电压降低为N+2组,减少印刷电路板装配上珈玛集成电路的数量以节省成本。
为让本发明的上述内容能更明显易懂,下文特举优选实施例,并配合所附图式,作详细说明如下:
附图说明
图1为现有技术中通过硬件调整珈玛电压的示意图;
图2为现有技术中珈玛电压与穿透率的关系图;
图3为根据本发明实施例的珈玛电压调整装置、液晶面板及时序控制器的方快图;
图4为根据本发明第一实施例的珈玛电压调整装置;
图5为根据本发明第一实施例的珈玛电压调整装置的调整方法的流程图;
图6为为根据本发明第一实施例的2组负极性珈玛电压及N组正极性珈玛电压与穿透率的关系图;
图7为根据本发明第二实施例的珈玛电压调整装置;
图8为根据本发明第二实施例的珈玛电压调整装置的调整方法的流程图;以及
图9为为根据本发明第二实施例的2组正极性珈玛电压及N组负极性珈玛电压与穿透率的关系图。
具体实施方式
以下各实施例的说明是参考附加的图式,用以例示本发明可用以实施的特定实施例。
请参阅图3至图5,图3为根据本发明实施例的珈玛电压调整装置3、液晶面板34及时序控制器36的方快图,图4为根据本发明第一实施例的珈玛电压调整装置3,图5为根据本发明第一实施例的电压调整装置3的调整方法的流程图。所述珈玛电压调整装置3用于提供一液晶面板34显示N组灰阶。所述珈玛电压调整装置3包括一印刷电路板装配30以及一珈玛电压微调单元32。所述珈玛电压微调单元32例如为一数据芯片。所述珈玛电压微调单元32包括若干个电阻R。
于步骤S50中,所述印刷电路板装配30产生N+2组珈玛电压,所述N+2组珈玛电压包括2组负极性珈玛电压GMA1-GMA2以及N组正极性珈玛电压GMAN+1-GMA2N,其中所述2组负极性珈玛电压GMA1-GMA2分别对应至一最高灰阶以及一最低灰阶,所述N组正极性珈玛电压GMAN+1-GMA2N分别对应至所述N组灰阶。
所述印刷电路板装配30包括若干个珈玛集成电路(未图示)以产生所述N+2组珈玛电压。由于本发明仅需要产生N+2组珈玛电压,与图1的现有技术相比可以大幅降低珈玛集成电路(未图示)的数量,进而节省所述印刷电路板装配30的成本。
于步骤S52中,所述2组负极性珈玛电压GMA1-GMA2及所述N组正极性珈玛电压GMAN+1-GMA2N输入到所述珈玛电压微调单元32。
于步骤S54中,所述珈玛电压微调单元32根据所述2组负极性珈玛电压GMA1-GMA2产生M组负极性驱动电压或N组负极性驱动电压,并根据所述N组正极性珈玛电压GMAN+1-GMA2N产生N组正极性驱动电压,M小于或等于N。更明确地说,所述珈玛电压微调单元32是通过电阻R进行分压以产生上述负极性驱动电压及正极性驱动电压。
于一实施例中,所述珈玛电压微调单元32根据所述2组负极性珈玛电压GMA1-GMA2直接产生N组负极性驱动电压以与N组正极性驱动电压对称。
于另一实施例中,所述珈玛电压微调单元32根据所述2组负极性珈玛电压GMA1-GMA2产生M组负极性驱动电压,再由一电性耦接至所述珈玛电压微调单元32的时序控制器36将所述M组负极性驱动电压调整为与所述N组正级性驱动电压对称的N组负级性驱动电压。
图6为为根据本发明第一实施例的2组负极性珈玛电压GMA1-GMA2及N组正极性珈玛电压GMAN+1-GMA2N与穿透率的关系图。
请参阅图3、图7及图8,图7为根据本发明第二实施例的珈玛电压调整装置7,图8为根据本发明第二实施例的珈玛电压调整装置7的调整方法的流程图。所述珈玛电压调整装置7即等同图3的珈玛电压调整装置3,用于提供液晶面板34显示N组灰阶。所述珈玛电压调整装置7包括一印刷电路板装配70以及一珈玛电压微调单元72。所述珈玛电压微调单元72例如为一数据芯片。所述珈玛电压微调单元72包括若干个电阻R。
于步骤S80中,所述印刷电路板装配70产生N+2组珈玛电压,所述N+2组珈玛电压包括2组正极性珈玛电压GMAN+1-GMAN+2以及N组负极性珈玛电压GMA1-GMAN,其中所述2组正极性珈玛电压GMAN+1-GMAN+2分别对应至一最高灰阶以及一最低灰阶,所述N组负极性珈玛电压GMA1-GMAN分别对应至所述N组灰阶。
与第一实施例类似,本发明的第二实施例仅需要产生2组正极性珈玛电压GMAN+1-GMAN+2,总共仅需要产生N+2组珈玛电压,与图1的现有技术相比可以大幅降低珈玛集成电路(未图示)的数量,进而节省所述印刷电路板装配70的成本。
于步骤S82中,所述2组正极性珈玛电压GMAN+1-GMAN+2及所述N组负极性珈玛电压GMA1-GMAN输入到所述珈玛电压微调单元72。
于步骤S84中,所述珈玛电压微调单元72根据所述2组正极性珈玛电压GMAN+1-GMAN+2产生M组正极性驱动电压或N组正极性驱动电压,并根据所述N组负极性珈玛电压产生N组负极性驱动电压,M小于或等于N。更明确地说,所述珈玛电压微调单元72是通过电阻R进行分压以产生上述负极性驱动电压及正极性驱动电压。
于一实施例中,所述珈玛电压微调单元72根据所述2组正极性珈玛电压GMAN+1-GMAN+2直接产生N组正极性驱动电压以与N组负极性驱动电压对称。
于另一实施例中,所述珈玛电压微调单元72根据所述2组正极性珈玛电压GMAN+1-GMAN+2产生M组正极性驱动电压,再由图3的时序控制器36将所述M组正极性驱动电压调整为与所述N组负级性驱动电压对称的N组正级性驱动电压。
图9为为根据本发明第二实施例的2组正极性珈玛电压GMAN+1-GMAN+2及N组负极性珈玛电压GMA1-GMAN与穿透率的关系图。
本发明的珈玛电压调整装置的调整方法通过将现有技术中所需的2N组珈玛电压降低为N+2组,减少印刷电路板装配上珈玛集成电路的数量以节省成本。
综上所述,虽然本发明已以优选实施例揭露如上,但上述优选实施例并非用以限制本发明,本领域的普通技术人员,在不脱离本发明的精神和范围内,均可作各种更动与润饰,因此本发明的保护范围以权利要求界定的范围为准。

Claims (8)

1.一种珈玛电压调整装置的调整方法,所述珈玛电压调整装置用于提供一液晶面板显示N组灰阶且包括一印刷电路板装配以及一珈玛电压微调单元,其特征在于,所述珈玛电压调整装置的调整方法包括:
所述印刷电路板装配产生N+2组珈玛电压,所述N+2组珈玛电压包括2组负极性珈玛电压以及N组正极性珈玛电压,所述2组负极性珈玛电压分别对应至一最高灰阶以及一最低灰阶,所述N组正极性珈玛电压分别对应至所述N组灰阶;
所述2组负极性珈玛电压及所述N组正极性珈玛电压输入到所述珈玛电压微调单元;以及
所述珈玛电压微调单元根据所述2组负极性珈玛电压产生M组或N组负极性驱动电压,并根据所述N组正极性珈玛电压产生N组正极性驱动电压,M小于或等于N。
2.根据权利要求1所述的珈玛电压调整装置的调整方法,其特征在于,所述珈玛电压微调单元包括若干个电阻,所述珈玛电压微调单元通过这些电阻进行分压以产生所述负极性驱动电压及所述正极性驱动电压。
3.根据权利要求1所述的珈玛电压调整装置的调整方法,其特征在于,所述珈玛电压微调单元根据所述2组负极性珈玛电压直接产生所述N组负极性驱动电压以与所述N组正极性驱动电压对称。
4.根据权利要求1所述的珈玛电压调整装置的调整方法,其特征在于,所述珈玛电压微调单元根据所述2组负极性珈玛电压产生M组负极性驱动电压,再由一时序控制器将所述M组负极性驱动电压调整为与所述N组正级性驱动电压对称的N组负级性驱动电压。
5.一种珈玛电压调整装置的调整方法,所述珈玛电压调整装置用于提供一液晶面板显示N组灰阶且包括一印刷电路板装配以及一珈玛电压微调单元,其特征在于,所述珈玛电压调整装置的调整方法包括:
所述印刷电路板装配产生N+2组珈玛电压,所述N+2组珈玛电压包括2组正极性珈玛电压以及N组负极性珈玛电压,所述2组正极性珈玛电压分别对应至一最高灰阶以及一最低灰阶,所述N组负极性珈玛电压分别对应至所述N组灰阶;
所述2组正极性珈玛电压及所述N组负极性珈玛电压输入到所述珈玛电压微调单元;以及
所述珈玛电压微调单元根据所述2组正极性珈玛电压产生M组或N组正极性驱动电压,并根据所述N组负极性珈玛电压产生N组负极性驱动电压,M小于或等于N。
6.根据权利要求5所述的珈玛电压调整装置的调整方法,其特征在于,所述珈玛电压微调单元包括若干个电阻,所述珈玛电压微调单元通过这些电阻进行分压以产生所述负极性驱动电压及所述正极性驱动电压。
7.根据权利要求5所述的珈玛电压调整装置的调整方法,其特征在于,所述珈玛电压微调单元根据所述2组正极性珈玛电压直接产生所述N组正极性驱动电压以与所述N组负极性驱动电压对称。
8.根据权利要求5所述的珈玛电压调整装置的调整方法,其特征在于,所述珈玛电压微调单元根据所述2组正极性珈玛电压产生M组正极性驱动电压,再由一时序控制器将所述M组正极性驱动电压调整为与所述N组负级性驱动电压对称的N组正级性驱动电压。
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