CN106710565A - Correction method for liquid crystal display screen array - Google Patents

Correction method for liquid crystal display screen array Download PDF

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Publication number
CN106710565A
CN106710565A CN201710199795.7A CN201710199795A CN106710565A CN 106710565 A CN106710565 A CN 106710565A CN 201710199795 A CN201710199795 A CN 201710199795A CN 106710565 A CN106710565 A CN 106710565A
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China
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lcd
array
crystal display
liquid crystal
brightness
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CN201710199795.7A
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Chinese (zh)
Inventor
周晟
陈端云
叶勋
葛元鹏
傅慧斌
蔡晓明
钟德志
陈芬
陈小倩
范炜琳
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国网福建省电力有限公司
国家电网公司
国网福建省电力有限公司信息通信分公司
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Priority to CN201710199795.7A priority Critical patent/CN106710565A/en
Publication of CN106710565A publication Critical patent/CN106710565A/en

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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
    • G09G3/3406Control of illumination source
    • 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
    • G09G3/3406Control of illumination source
    • G09G3/3413Details of control of colour illumination sources
    • 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

Abstract

The invention relates to a correction method for a liquid crystal display screen array and provides a master control module, a liquid-crystal display array and a video source, wherein the master control module is electrically connected with the liquid-crystal display screen array and the video source. The correction method comprises the following steps: step (S1), replacing a liquid-crystal display screen into the liquid-crystal display screen array; step (S2), determining the working brightness of a backlight source of the newly-replaced liquid-crystal display screen according to prestored backlight brightness-time attenuation curve, the current working time of the liquid-crystal display screen array and the current brightness of the liquid-crystal display screen array; and step (S3), adjusting the brightness of the backlight source of the newly-replaced liquid-crystal display screen to the working brightness determined in the step (2). According to the correction method, the cost of hardware equipment is saved.

Description

一种液晶显示屏阵列的校正方法 A method for correcting the LCD array

技术领域 FIELD

[0001]本发明涉及液晶显示屏的校正领域,特别是一种液晶显示屏阵列的校正方法。 [0001] The present invention relates to the field of correction of the LCD screen, in particular a method for correcting the LCD array.

背景技术 Background technique

[0002]液晶显不器(英语:Liquid Crystal Display,缩与:LCD)为平面薄型的显不设备, 其面板由一定数量的彩色或黑白像素组成,放置于光源或者反射面前方。 [0002] The liquid crystal display device does not (English: Liquid Crystal Display, and reduction: LCD) does not significantly thin planar device which panel consists of a number of color or monochrome pixels, placed in front of the light source or reflector side. 参考如图1所示的液晶显;^器结构,液晶显示器由偏光板101、玻璃基板102彩色滤光片103、配向膜104、液晶105、配向膜106、玻璃基板107、偏光板108、光学膜片109、灯光反射板110、冷阴极灯管111、 导光板112、光学膜片113等组成,其工作原理是通过控制背光模组122的背光源透过液晶面板121的光线的颜色和透过光线的多少,实现图像的显示。 Shown in Figure 1 with reference to the liquid crystal display; ^ structure, a liquid crystal display by the polarizer 101, a glass substrate 102, color filters 103, an alignment film 104, liquid crystal 105, an alignment film 106, a glass substrate 107, a polarizer 108, an optical film 109, the light reflection plate 110, cold cathode fluorescent lamp 111, the light guide plate 112, optical film 113, etc., which works by the backlight control module 122 of the backlight color of the light transmitted through the liquid crystal panel 121 and the lens how many light, to achieve the image.

[0003]在一些需要大屏显示的场合,通过拼接液晶显示器,以获得更大面积的显示效果。 [0003] In some applications requiring a large screen display, a liquid crystal display by splicing, to obtain a larger display area. 如今拼接液晶显示器被广泛的应用于政府、公安、交通等多个领域。 Today splicing liquid crystal displays are widely used in fields of government, public security, transportation and so on. 拼接液晶屏在使用一段时间后同样会出现亮度衰减,而且,这种衰减是不可逆的。 Similarly splicing LCD screen brightness decay occurs after a period of time, and that this is irreversible decay. 拼接液晶屏的亮度不同程度地衰减会严重影响LED显示屏的显示效果和使用寿命。 Splicing LCD screen brightness to varying degrees attenuation will seriously affect the display and the LED display lifetime. 在拼接屏幕安装或者液晶显示器维修替换的过程中,如果相邻的两块拼接视频屏幕的亮度调整不当,会导致画面会不连续,例如出现颜色粗糙或者马赛克现象。 During screen installation splicing repair or replacement of a liquid crystal display, if the two adjacent video screen luminance adjustment splice properly, will cause the screen will not be continuous, e.g. roughness or mosaic color appears.

[0004] 在《基于CCD的LED显示屏亮度校正技术的应用》中提供了一种校正方案,即采用高性能照相机(为照片中不出现摩尔纹)采集液晶显示屏的亮度数据,然后使用校正技术对采集的亮度数据进行分析、校正,最后把经过校正的亮度数据文件上传到显示屏控制板。 [0004] provided in the "Application of CCD-based LED display brightness correction technology" in a correction scheme, i.e., using high-performance camera LCD screen luminance data collection (The photographs Moire does not occur), then using the correction techniques to analyze the collected luminance data, correction, and finally the corrected luminance data file is uploaded to the display panel.

[0005]但是现有的校正方案设备昂贵,设备与拼接屏幕设备之间连接复杂。 [0005] However, the conventional equipment is expensive correction scheme, the connection between the device and the screen device splicing complex.

发明内容 SUMMARY

[0006] 有鉴于此,本发明的目的是提出一种液晶显示屏阵列的校正方法,节约了硬件设备成本。 [0006] In view of this, an object of the present invention is to provide a method for correcting the LCD array, hardware cost savings.

[0007]本发明采用以下方案实现:一种液晶显示屏阵列的校正方法,提供一主控模块、液晶显示屏阵列以及视频源,所述主控模块与所述液晶显示屏阵列、视频源电性相连;包括以下步骤: 步骤S1:更换一块液晶显示屏至液晶显示屏阵列中; 步骤S2:根据预存的背光亮度-时间衰减曲线、液晶显示屏阵列的当前工作时间和液晶显示屏阵列的当前亮度,确定新更换的液晶显示屏的背光源的工作亮度; 步骤S3:将新更换的液晶显示屏的背光源的亮度调整到步骤S2确定的工作亮度。 [0007] The present invention is implemented using the following protocol: A method for correcting the LCD array, there is provided a control module, and a video source of the LCD array, the master module and the LCD array, the video source electrode of connected; comprising the following steps: step S1: an LCD screen to replace the LCD array; step S2: the pre-stored brightness of the backlight - decay curve, the current operating time and the LCD array of the LCD array of the current time luminance, the luminance of the backlight determine the working of the new replacement LCD; step S3: the luminance of the backlight of the LCD screen new replacement work is adjusted to the brightness determined in step S2.

[0008] 进一步地,所述步骤S2中的当前工作时间为所述液晶显示屏阵列中各液晶显示屏的工作时间的平均。 [0008] Further, a current operation time of the step S2 is the average of the LCD array in the LCD for each working time.

[0009] 进一步地,所述步骤S2中的当前工作时间为所述液晶显示屏阵列中工作时间最长的那块液晶显示屏的工作时间。 [0009] Further, a current operation time of the step S2 is the working time of the LCD array in the longest operating time piece of the LCD.

[0010] 进一步地,所述步骤S2中的当前工作时间为所述液晶显示屏阵列中亮度最低的那块液晶显示屏的工作时间。 [0010] Further, a current operation time of the step S2 is the working time of the LCD array in the lowest brightness of the LCD piece.

[0011]进一步地,所述预存的背光亮度-时间衰减曲线为通过实验手段测得的液晶显示屏背光亮度与累计工作时间之间关系的曲线图。 [0011] Further, the pre-stored backlight luminance - time decay curve is a graph showing the relationship between the brightness and the LCD backlight cumulative operating time measured by experimental means.

[0012]进一步地,所述主控模块驱各液晶显示屏驱动控制电路控制背光源和输出信号, 所述各液晶显示屏驱动控制电路包括显示驱动模块和存储模块,所述显示驱动模块驱动液晶显不屏显不光彳目号,所述存储模块存储有液晶显示屏的显示参数。 [0012] Further, each of the drive control module driving the LCD and the backlight control circuit controls the output signal, the liquid crystal display driver comprises a display driving control circuit module and a storage module, the module driving the liquid crystal display driver OSD left foot not only significantly mesh number, the storage module stores a LCD display parameters.

[0013]进一步地,所述显示参数包括液晶显示屏阵列的工作时间,所述主控模块预存的背光亮度-时间衰减曲线。 [0013] Further, the display parameter comprises an array of liquid crystal display operating time, the main control module stored in the backlight luminance - time decay curve.

[00M]进一步地,在调节液晶显示屏亮度时,所述主控模块根据预存的背光亮度-时间衰减曲线、液晶显示屏阵列的当前亮度和从存储模块获得的当前工作时间,确定新更换的液晶显示屏的背光源的工作亮度;所述控制器通知所述显示驱动模块将新更换的液晶显示屏的背光源的亮度调整到工作亮度。 [00M] Further, when adjusting the brightness of the LCD screen, the main control module in accordance with pre-stored brightness of the backlight - decay curve, the current brightness and the current time obtained from the work memory array of the LCD module of time, determine a new replacement working luminance of the backlight of the liquid crystal display panel; said controller notifies the display luminance of the backlight module driving the new replacement work is adjusted to the LCD screen brightness.

[0015]较佳的,将新更换的液晶显示屏的背光源的亮度调整到工作亮度具体为改变背光源驱动电流从而实现对所述背光源的亮度校正。 [0015] Preferably, the luminance of the backlight of the LCD screen new replacement work is adjusted to the brightness change particularly to a backlight drive current to achieve the correction of the luminance of the backlight.

[0016] 进一步的,还包括步骤:根据预设的时间间隔,对液晶显示屏阵列中的液晶显示屏进行逐一校正。 [0016] Further, further comprising the step of: according to a preset time interval, the LCD screen of the LCD array corrected one by one.

[0017]与现有技术相比,本发明有以下有益效果:本发明通过预存的背光亮度-时间曲线,推算出工作时间对应的亮度衰减百分比,因此在替换显示阵列中的液晶显示屏时,可以更好的调节替换后的显示屏,以使其亮度很好的适配液晶显示阵列,并且节约了硬件设备成本。 [0017] Compared with the prior art, the present invention has the following advantages: The present invention prestored backlight luminance - time curve, corresponding to the percentage of working time deduced brightness decay, so when the array in alternative LCD display, after replacement may better adjust display luminance so well adapted to the liquid crystal display array, and saves the hardware cost.

附图说明 BRIEF DESCRIPTION

[0018] 图1为本发明背景技术中所述的液晶显示屏结构示意图。 BACKGROUND structural diagram of the liquid crystal display [0018] FIG. 1 according to the present invention art.

[0019] 图2为本发明实施例中校正设备架构示意图。 [0019] FIG. 2 architecture diagram correcting apparatus in the embodiment of the present invention.

[0020] 图3为本发明实施例中方法流程示意图。 [0020] FIG. 3 is a schematic process according to an embodiment of the present invention.

[0021]图4为本发明实施例中不同驱动电流对光衰曲率关系示意图。 [0021] FIG. 4 is a schematic of different drive currents to light decay curvature relationships embodiment of the present invention.

[0022]图5为本发明实施例中亮度与脉宽的曲线图。 [0022] FIG. 5 embodiment luminance graph of the pulse width of the embodiment of the present invention.

[0023][主要组件符号说明] 图中:101为偏光板;102为玻璃基板;103为彩色滤光片;104为配向膜;105为液晶;106 为配向膜;107为玻璃基板;108为偏光板;109为光学膜片;110为灯光反射板;111为冷阴极灯管;112为导光板;113为光学膜片;121为液晶面板;122为背光模组;2011为液晶显示屏; 2012为液晶显示屏;201为液晶显示屏阵列;202为主控模块;203为视频源。 [0023] [Description of Symbols major components] FIG: A polarizer 101; 102 is a glass substrate; a color filter 103; an alignment film 104; 105 is a liquid crystal; an alignment film 106; 107 is a glass substrate; 108 a polarizing plate; optical film 109; for a light reflection plate 110; 111 is a cold cathode fluorescent lamp; light guide plate 112; 113 of the optical film; liquid crystal panel 121; backlight module 122; 2011 is a liquid crystal display; 2012 is a liquid crystal display; LCD array 201; 202 is a main control module; 203 video source.

具体实施方式 Detailed ways

[0024]下面结合附图及实施例对本发明做进一步说明。 [0024] further described below in conjunction with the accompanying drawings and embodiments of the present invention do.

[0025]本实施例提供了一种液晶显示屏阵列的校正方法,提供一主控模块、液晶显示屏阵列以及视频源,所述主控模块与所述液晶显示屏阵列、视频源电性相连;包括以下步骤: 步骤S1:更换一块液晶显示屏至液晶显示屏阵列中; 步骤S2:根据预存的背光亮度-时间衰减曲线、液晶显示屏阵列的当前工作时间和液晶显示屏阵列的当前亮度,确定新更换的液晶显示屏的背光源的工作亮度; 步骤S3:将新更换的液晶显示屏的背光源的亮度调整到步骤S2确定的工作亮度。 [0025] The present embodiment provides a calibration method of the LCD array, there is provided a control module, and a video source of the LCD array, the master module and the LCD array, electrically connected to the video source ; comprising the following steps: step S1: an LCD screen to replace the LCD array; step S2: the pre-stored backlight luminance - time curve decay, the current brightness of the LCD array of the current operating time and the LCD array, determining a new replacement LCD backlight brightness work; step S3: the luminance of the backlight of the LCD screen new replacement work is adjusted to the brightness determined in step S2.

[0026]在本实施例中,所述步骤S2中的当前工作时间为所述液晶显示屏阵列中各液晶显示屏的工作时间的平均。 [0026] In the present embodiment, a current operation time of the step S2 is the average of the LCD array in the LCD for each working time.

[0027]在本实施例中,所述步骤S2中的当前工作时间为所述液晶显示屏阵列中工作时间最长的那块液晶显示屏的工作时间。 [0027] In the present embodiment, a current operation time of the step S2 is the working time of the LCD array in the longest operating time piece of the LCD.

[0028]在本实施例中,所述步骤S2中的当前工作时间为所述液晶显示屏阵列中亮度最低的那块液晶显不屏的工作时间。 [0028] In the present embodiment, a current operation time of the step S2 is the working time of the liquid crystal display array in the lowest brightness piece LCD screen not.

[0029]在本实施例中,所述预存的背光亮度-时间衰减曲线为通过实验手段测得的液晶显示屏背光亮度与累计工作时间之间关系的曲线图。 [0029] In the present embodiment, the backlight brightness prestored - time decay curve is a graph showing the relationship between the brightness and the LCD backlight cumulative operating time measured by experimental means.

[0030] 在本实施例中,所述主控模块驱各液晶显示屏驱动控制电路控制背光源和输出信号,所述各液晶显示屏驱动控制电路包括显示驱动模块和存储模块,所述显示驱动模块驱动液晶显示屏显示光信号,所述存储模块存储有液晶显示屏的显示参数。 [0030] In the present embodiment, the control module driving the liquid crystal display backlight driving control signal and an output control circuit, the liquid crystal display driver comprises a display driving control circuit module and a storage module, the display driver LCD display module driving an optical signal, the storage module stores a LCD display parameters.

[0031] 在本实施例中,所述显示参数包括液晶显示屏阵列的工作时间,所述主控模块预存的背光亮度-时间衰减曲线。 [0031] In the present embodiment, the display parameters comprise an array of liquid crystal display operating time, the main control module stored in the backlight luminance - time decay curve.

[0032] 在本实施例中,在调节液晶显示屏亮度时,所述主控模块根据预存的背光亮度-时间衰减曲线、液晶显示屏阵列的当前亮度和从存储模块获得的当前工作时间,确定新更换的液晶显示屏的背光源的工作亮度;所述控制器通知所述显示驱动模块将新更换的液晶显示屏的背光源的亮度调整到工作亮度。 [0032] In the present embodiment, when adjusting the brightness of the LCD screen, the main control module in accordance with pre-stored backlight luminance - time curve decay, the current brightness of the LCD array and the current time obtained from working storage module determines working luminance of the backlight of the LCD new replacement; said controller notifies the display luminance of the backlight module driving the new replacement work is adjusted to the LCD screen brightness.

[0033]较佳的,在本实施例中,将新更换的液晶显示屏的背光源的亮度调整到工作亮度具体为改变背光源驱动电流从而实现对所述背光源的亮度校正。 [0033] Preferably, in the present embodiment, the luminance of the backlight of the LCD screen new replacement work is adjusted to the brightness change particularly to a backlight drive current to achieve the correction of the luminance of the backlight.

[0034] 在本实施例中,还包括步骤:根据预设的时间间隔,对液晶显示屏阵列中的液晶显示屏进行逐一校正。 [0034] In the present embodiment, further comprising the step of: according to a preset time interval, the LCD screen of the LCD array corrected one by one.

[0035]下面结合说明书附图更加详细的对本实施例进行说明。 [0035] in more detail below in conjunction with the accompanying drawings of the present embodiment will be described.

[0036] 如图2所示,本实施例提供一种液晶显示屏阵列的校正设备,该设备由液晶显示屏阵列和主控模块组成。 [0036] As shown in FIG 2, the present embodiment provides a liquid crystal display apparatus correcting an array of liquid crystal display device of the array and the main control module. 该液晶显示屏阵列201由多个液晶显示屏(液晶显示屏2011,液晶显示屏2012,其他未标出)拼接而成,所述液晶显示屏阵列连接主控模块202,所述主控模块连接视频源203。 The LCD array 201 by splicing a plurality of liquid crystal display (LCD 2011, LCD 2012, the other not shown) from the control module connected to the LCD array 202, the main control module is connected video source 203. 所述主控模块可以是控制芯片等集成控制模块,也可以是控制台、电脑等。 The control module may control chips integrated control module, it may be console computers. 主控模块接收外部视频信号,根据液晶显示屏阵列的参数,把视频画面分割为多个子显示画面,通过RS232或DVI 口传输给液晶显示屏阵列进行显示。 The main control module receives an external video signal, according to the parameters of the LCD array, the video picture is divided into a plurality of sub-display screen, the LCD display to the DVI port RS232 or an array transmission.

[0037]由于液晶屏随着工作时间的积累,其亮度在使用一段时间后会出现亮度衰减,甚至损坏。 [0037] Since the liquid crystal panel with the accumulation of the operating time, the brightness of light attenuation occurs in use for some time, or even damaged. 因此需要对拼接屏幕阵列定期的进行检查和维修。 So the need for splice array screen regularly for inspection and maintenance. 在维修过程中,对那些坏的液晶显示屏进行替换。 During maintenance, for those bad LCD screen replacement.

[0038] 如图3所示,对于替换的新的液晶显示屏执行下列校正步骤: S301:更换一块液晶显示屏至液晶显示屏排列中; S302:并根据预存的背光亮度-时间衰减曲线与液晶显示屏阵列的当前工作时间,和液晶显示屏阵列的当前亮度,确定新更换的液晶显示屏的背光源的工作亮度; 在本实施例中,所述的当前工作时间为液晶显示屏阵列中的各液晶显示屏的工作时间的平均值。 [0038] As shown in FIG. 3, for alternative new liquid crystal display screen to perform correction following steps: S301: an LCD screen to replace the arrangement in the LCD; S302: The pre-stored and the backlight luminance - time decay curve of the liquid crystal current operating time of the display array, and the current brightness LCD array, determining a new replacement work of the luminance of the backlight of the LCD display; in the present embodiment, the operating time of the current LCD array the average of the operating time of the LCD. 也可以为液晶显示屏阵列中的工作时间最长的那块液晶显示屏的工作时间。 Working time may also display LCD array is the longest piece of working liquid. 即亮度最低的那块液晶显示屏的工作时间值。 I.e. the lowest brightness of the LCD piece of work time value.

[0039]若工作电流为恒流电流则工作时间为实际通电时间;若工作电流为脉冲电流则工作时间计算如下: 工作时间=占空比X通电时间; 脉冲所能达到的最大值称为“脉冲宽度”。 [0039] When the operating current of the constant current energization time the actual operating time; if the operating current of the pulse current working time is calculated as follows: duty ratio = X hours energization time; referred to as the maximum attainable pulse " Pulse Width". 形状、幅度和宽度是脉冲的主要参数。 Shape, amplitude and pulse width of the main parameters. 脉宽由信号的周期和占空比确定,其计算公式是脉宽W=TXP(T:周期,P:占空比);在本实施例中, 所述脉冲电流为矩形波电流。 Determined by the pulse width and duty cycle of the signal, which is calculated as a pulse width W = TXP (T: period, P: duty cycle); In the present embodiment, the pulse current is a rectangular wave current. 所述预存的背光亮度-时间衰减曲线为通过实验手段测得的背光亮度与累计工作时间之间关系的曲线图。 The prestored backlight luminance - time decay curve is a graph showing the relationship between means of experimentally measured backlight luminance and the accumulated operating time. 背光亮度与工作时间的关系曲线大致为抛物线型,但具体的因为材料、封装工艺、PN结温度、工作电流的不同,背光源的亮度随累计工作时间的增加而衰减的曲线也不同。 Backlight brightness curve and the working time is substantially parabolic, but because of the different specific, the luminance of the backlight increases with the cumulative operating time of the material, the packaging process, the temperature of the PN junction, and the operating current decay curves are different. 如图4所示,图4示例了不同驱动电流对光衰曲率的影响。 4, FIG. 4 illustrates the effect of different drive currents to light decay curvature. 图4为随机抽取3528LED和3014LED,按驱动电流20mA、25mA、30mA各分为三组进行1008H 的光衰实验,以比较分析两种不同散热模式LED的光衰和色坐标漂移程度,从而研宄电流对其光色特性的影响。 FIG 4 is a randomly selected 3528LED and 3014LED, according to the driving current 20mA, 25mA, 30mA were divided into three groups for experiments 1008H bad light to compare the two different analyzing light failure degree and cooling modes the LED color coordinates shift, so that a Subsidiary effect on light and color characteristics of the current. 图4中的横轴为工作时间,即背光源的累计工作时间,纵轴为亮度衰减百分比,从实验数据得到,背光源的衰减不是线性的,不同背光源的衰减曲线是不一样的, 而且不同的工作电流对背光源的衰减的影响是不一样的。 The horizontal axis in FIG. 4 is a working time, i.e., cumulative operating time of the backlight, the vertical axis represents the percentage of light attenuation, obtained from the experimental data, the attenuation of the backlight is not linear, the attenuation curves for different backlight is not the same, and the effects of different operating current of decay backlight is not the same.

[0040]所述的确定新更换的液晶显示屏的背光源的工作亮度的具体为:根据显示阵列的工作时间,和预存的背光亮度—时间衰减曲线,预计当前替换后的显示屏的工作亮度。 [0040] The determination of the new replacement backlight the LCD screen luminance is specifically work: an operating time of the display array, and the backlight luminance prestored - attenuation curve, is expected brightness of the display after the working current replacement .

[0041]如图5所示,在液晶显示阵列工作了x小时时,液晶显示阵列预测亮度衰减为&%,替换一块全新的液晶显示屏搭配阵列中,则全新的液晶显示屏预计调整工作亮度为a%将能和显示阵列亮度有较好的匹配。 When [0041] FIG. 5, showing an array of working hours x in the liquid crystal, the liquid crystal display luminance attenuation prediction array & amp;%, alternatively a liquid crystal display panel with a new array, the new LCD expected adjustment a% brightness and display array will be able to better match the brightness.

[0042]在本实施例中,如果全新的显示阵列的亮度设置为80%,液晶显示在液晶显示阵列工作了x小时时,液晶显示阵列预测亮度衰减为80%Xa%,替换一块全新的液晶显示屏搭配阵列中,则全新的液晶显示屏预计调整工作亮度为80%Xa%将能和显示阵列亮度有较好的匹配。 [0042] In the present embodiment, if the brightness setting new display array 80%, the liquid crystal display liquid crystal display when the array working x hours, the liquid crystal display array predicted luminance attenuation to 80% Xa% replacing a new liquid crystal with the display array, the new LCD screen brightness adjustment estimated 80% Xa% and display array will be able to better match the brightness.

[0043] S3〇3:将新更换的液晶显示屏的背光源的亮度调整到工作测算屏幕亮度。 [0043] S3〇3: the luminance of the backlight of the LCD screen of the new replacement work estimates to adjust the screen brightness.

[0044]根据电流或电压或脉宽跟亮度的关系,设置液晶显示屏亮度。 [0044] The relationship between the current or voltage with a pulse width or brightness, the brightness of a liquid crystal display.

[0045] —般来说,要控制LED的亮度可以由简单的电压电流多寡调整,由于LED是二极体有着顺向偏压的特性,对于电压的变化比较敏感(不同电压下电流变化较为剧烈),通常会采用恒压变流的方式调整亮度。 [0045] - In general, brightness of the LED can be controlled by a simple adjustment of the amount of voltage and current, since the LED is a diode with a forward bias characteristic, sensitive to the voltage change (voltage and current variations at different more severe ), often by way of the constant-voltage converter to adjust brightness. LED的亮度与电流不呈线性关系,使得以等差数列的方式的改变电流来调整亮度,最终会导致LCD颜色色偏过大,而且采用此方法调光的明暗范围并不大。 LED brightness and current is not a linear relationship, such that to change the current arithmetic sequence manner to adjust the brightness, color shift will eventually lead to the color LCD is too large, and the use of this method of dimming the brightness range is not large.

[0046]优选的为通过脉宽调节液晶显示屏亮度。 [0046] The preferred pulse width is adjusted by the liquid crystal display brightness. 脉宽调节亮度的过程中PWM与亮度的关系为线性关系,如图5所示了一种亮度与脉宽的关系图。 Relationship between PWM and the luminance brightness pulse width modulation process is linear, as shown in a diagram of a relationship between the luminance and pulse width as shown in FIG 5. PWM只有2种状态,对于LED来说就是开跟关,藉由调整开关在时间内的占比,利用人眼的视觉暂留现象混出不同亮度。 PWM only two states, it is opened with the LED off, switch by adjusting the proportion of the time, using the human visual persistence phenomenon mix different luminance. 相对于利用电压或是电流调整LED,使用PWM调整LED亮度可以得到比较稳定的结果,调出来的亮度范围比较大,色偏比较小。 With respect to the LED current regulation or the voltage, and PWM adjustment of LED brightness can be used to obtain stable results, tune out relatively large range of brightness, color shift is relatively small.

[0047]由于充分的考虑了亮度曲线的走向的非线性的,且较难用一个公式去拟合,本实施例通过预存的背光亮度-时间曲线,推算出工作时间对应的亮度衰减百分比,因此在替换显示阵列中的液晶显示屏时,可以更好的调节替换后的显示屏,以使其亮度很好的适配液晶显示阵列。 [0047] Since full consideration to the luminance of the non-linear curve, and difficult to fit with a formula, stored by the present embodiment, a backlight luminance - time curve, calculate the percentage of the operating time corresponding to the luminance attenuated, when replacing the displayed array of liquid crystal display panel, the replacement may be adjusted to better display luminance so well adapted to the liquid crystal display array.

[0048] 在本实施例中,对于替换的新的显示屏还执行下列校正步骤: 根据液晶显示屏的工作亮度、当前工作时间以及预存的背光亮度-时间曲线确定新更换的液晶显示屏的新的工作亮度。 [0048] In the present embodiment, for the replacement of a new display also performs the following calibration steps of: working the brightness of the LCD, and the pre-stored operating time current backlight brightness - time curve determining the replaced new LCD work brightness.

[0049]例如,请参考图5,在液晶显示阵列工作了X小时时,液晶显示阵列预测亮度衰减为a%,则如果替换的是全新的液晶显示屏则工作亮度设置为a%。 [0049] For example, please refer to FIG. 5, the liquid crystal display when the array X work hours, the luminance of the liquid crystal display array predicted attenuation a%, if it is a new replacement work of the LCD screen luminance is set to a%. 替换一块旧的液晶显示屏搭配阵列中,旧的液晶显示屏工作了y小时,预测旧显示屏的工作亮度衰减为b%,则的旧液晶显示屏预计调整工作亮度为a%/b%将能和显示阵列亮度有较好的匹配。 Replace the old one with the LCD array, the old y LCD screen working hours old screen brightness forecasting attenuation b%, the old LCD brightness adjustment is expected a% / b% will and an array of display brightness can be well matched.

[0050]当新更换的液晶显示屏不是全新时,需要根据新更换的液晶显示屏的工作时间, 以及预存的背光亮度-时间衰减曲线预测当前电流下的亮度,预测新更换的显示屏衰减后的工作亮度;再通过亮度-脉宽的关系,调节新更换的液晶显示屏的驱动脉宽,把液晶显示屏的从衰减后的工作亮度调节到液晶显示屏阵列需要的工作亮度。 The time decay curve after the current luminance prediction current predicted attenuation new replacement display - [0050] When a new replacement LCD screen is not new, the need to replace the new LCD working hours, and the backlight brightness prestored work luminance; then the luminance - the relationship between the pulse width, the pulse width adjustment drive new replacement LCD screen, liquid crystal display panel from the adjustment work of the attenuated luminance of the LCD array to work required brightness. 这样就使就旧显示屏能很好的适配液晶显示阵列的亮度。 This allows the display to the old well adapted to the brightness of the LCD array.

[0051] 在本实施例中,还根据预设的时间间隔,对阵列中的液晶显示屏进行逐一校正。 [0051] In the present embodiment, also according to a preset time interval, the array of the liquid crystal display panel corrected one by one. 在液晶显示屏的实际使用过程中,随累计工作时间的增长,液晶显示屏亮度的衰减越发明显, 但是液晶显示屏的亮度随时间的衰减并非线性的,如图4。 In actual use of the liquid crystal display screen, with the growth of cumulative operating time, the brightness of the LCD decay more obvious, but the brightness of the LCD screen and linear decay with time, as shown. 因此工作时间不同的液晶显示器,其实亮度衰减的层度是不一样的。 Thus a liquid crystal display different working time, in fact, the degree of light attenuation layer is not the same. 所以当显示阵列工作一段时间后,比如100h时,对显示阵列逐块进行亮度调整有利于提高显示效果。 When the display array so that the working period of time, such as when lOOh, display luminance adjustment block by block arrays help to improve the display effect. 具体的为逐块进行如下步骤: 根据预存的背光亮度-时间衰减曲线和液晶显示屏阵列目标工作亮度,确定新更换的液晶显示屏的背光源的设置的工作亮度,所述的观察到液晶显示屏的亮度为实际工作亮度,设置的工作亮度乘以衰减率后接近或等于实际的工作亮度; 将液晶显示屏的背光源的亮度调整到工作测算屏幕亮度。 Specific block-by-step as follows: The pre-stored in the backlight luminance - time display attenuation curves and brightness LCD array target work, the work of determining the brightness setting of the new replacement backlight LCD, the liquid crystal was observed brightness of the display luminance practical work, the work is close to or equal to the brightness setting actually work multiplied by the luminance decay rate; the luminance of the backlight of the LCD screen brightness adjustment calculation to work.

[0052] 本实施例还提供一种液晶显示屏阵列设备,所述的液晶显示屏阵列由多块液晶显示屏组成,所述设备还包括主控模块主控模块驱动各液晶显示屏驱动控制电路控制背光源和输出信号,所述控制电路包括显示驱动模块和存储模块,所述显示驱动模块驱动液晶显示光信号,所述存储模块存储有液晶显示屏显示参数,所述显示参数包括液晶屏阵列工作时间,所述主控模块预存的背光亮度-时间衰减曲线; 在调节液晶显示屏亮度时,所述主控模块根据预存的背光亮度-时间衰减曲线、液晶显示屏阵列的当前亮度和从存储模块获得的当前工作时间,确定新更换的液晶显示屏的背光源的工作亮度;所述主控模块通知所述显示驱动模块将新更换的液晶显示屏的背光源的亮度调整到工作亮度。 [0052] The present embodiment provides a liquid crystal display device array, an array of the LCD screen by a plurality of liquid crystal composition, said apparatus further comprising a main control module control module drives the LCD drive control circuit controlling the backlight and the output signal, the control circuit includes a display driving module and a storage module, the liquid crystal display driving module drives the display light signal, the storage module stores a parameter LCD display, said display comprising a liquid crystal panel array parameters operation time, the main control module stored in the backlight luminance - time decay curve; when adjusting the brightness of the display screen, the main control module in accordance with pre-stored backlight luminance - time decay curve from the memory, the current brightness of the LCD array, and operating time obtained by the current block, determining a new work luminance of the backlight of the LCD screen replacement; the main control module notifies the display luminance of the backlight module driving the new replacement work is adjusted to the LCD screen brightness.

[0053]以上所述仅为本发明的较佳实施例,凡依本发明申请专利范围所做的均等变化与修饰,皆应属本发明的涵盖范围。 [0053] The foregoing is only preferred embodiments of the present invention, where the application under this invention, modifications and alterations made to the scope of the patent, also belong to the scope of the present invention.

Claims (8)

1. 一种液晶显示屏阵列的校正方法,其特征在于:提供一主控模块、液晶显示屏阵列以及视频源,所述主控模块与所述液晶显示屏阵列、视频源电性相连;包括以下步骤: 步骤S1:更换一块液晶显示屏至液晶显示屏阵列中; 步骤S2:根据预存的背光亮度-时间衰减曲线、液晶显示屏阵列的当前工作时间和液晶显示屏阵列的当前亮度,确定新更换的液晶显示屏的背光源的工作亮度; 步骤S3:将新更换的液晶显示屏的背光源的亮度调整到步骤S2确定的工作亮度。 1. A calibration method for an array of liquid crystal display, characterized by: providing a control module, and a video source of the LCD array, the master module and the LCD array, electrically connected to the video source; comprising the following steps: step S1: to replace an LCD screen in the liquid crystal array; step S2: the pre-stored backlight luminance - time curve decay, the current brightness of the current operating time and a liquid crystal display LCD array the array, determining a new replacement work of the luminance of the backlight of the LCD display; step S3: the luminance of the backlight of the LCD screen new replacement work is adjusted to the brightness determined in step S2.
2. 根据权利要求1所述的一种液晶显示屏阵列的校正方法,其特征在于:所述步骤S2中的当前工作时间为所述液晶显示屏阵列中各液晶显示屏的工作时间的平均。 The calibration method of claim 1. A method as claimed in claim LCD array, wherein: a current operation time of the step S2 is the average of the liquid crystal display array in each of the liquid crystal display panel of the operating time.
3. 根据权利要求1所述的一种液晶显示屏阵列的校正方法,其特征在于:所述步骤S2中的当前工作时间为所述液晶显示屏阵列中工作时间最长的那块液晶显示屏的工作时间。 The calibration method of claim 1. A method as claimed in claim LCD array, wherein: a current operation time of the step S2 is a liquid crystal display array longest working piece LCD working hours.
4. 根据权利要求1所述的一种液晶显示屏阵列的校正方法,其特征在于:所述步骤S2中的当前工作时间为所述液晶显示屏阵列中亮度最低的那块液晶显示屏的工作时间。 The calibration method of claim 1. A method as claimed in claim LCD array, wherein: a current operation time of the step S2 is a liquid crystal display array lowest brightness LCD work piece time.
5. 根据权利要求1所述的一种液晶显示屏阵列的校正方法,其特征在于:所述预存的背光亮度-时间衰减曲线为通过实验手段测得的液晶显示屏背光亮度与累计工作时间之间关系的曲线图。 The calibration method of claim 1. A method as claimed in claim LCD array, wherein: said pre-stored backlight luminance - time decay curve measured by experimental means the brightness of the LCD backlight of the cumulative operating time graph showing the relationship between the.
6. 根据权利要求1所述的一种液晶显示屏阵列的校正方法,其特征在于:所述主控模块驱各液晶显示屏驱动控制电路控制背光源和输出信号,所述各液晶显示屏驱动控制电路包括显示驱动模块和存储模块,所述显示驱动模块驱动液晶显示屏显示光信号,所述存储模块存储有液晶显示屏的显示参数。 The calibration method of claim 1. A method as claimed in claim LCD array, wherein: each of said drive control module controls the LCD driver circuit and the output signal controlling the backlight, the liquid crystal display driver the control circuit includes a display driving module and a storage module, the display driving module drives the LCD display optical signal, the storage module stores a LCD display parameters.
7. 根据权利要求6所述的一种液晶显示屏阵列的校正方法,其特征在于:所述显示参数包括液晶显示屏阵列的工作时间,所述主控模块预存的背光亮度-时间衰减曲线。 7. The method of claim 6 corrects a liquid crystal display array according to claim, wherein: said parameters comprise display LCD array operation time, the main control module stored in the backlight luminance - time decay curve.
8. 根据权利要求6所述的一种液晶显示屏阵列的校正方法,其特征在于:在调节液晶显示屏亮度时,所述主控模块根据预存的背光亮度-时间衰减曲线、液晶显示屏阵列的当前亮度和从存储模块获得的当前工作时间,确定新更换的液晶显示屏的背光源的工作亮度;所述控制器通知所述显示驱动模块将新更换的液晶显示屏的背光源的亮度调整到工作亮度。 8. The calibration method of claim 6 array of a liquid crystal display according to claim, wherein: when adjusting the brightness of the LCD screen, the main control module in accordance with pre-stored backlight luminance - time attenuation curve, the LCD array and the current brightness of the current time obtained from working storage module determines a new work luminance of the backlight of the LCD screen replacement; said controller notifies the display luminance adjustment of the backlight module driving the liquid crystal display panel of the new replacement to work brightness.
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