CN102025952A - Brightness correction method and system for display device - Google Patents

Brightness correction method and system for display device Download PDF

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CN102025952A
CN102025952A CN 201010554422 CN201010554422A CN102025952A CN 102025952 A CN102025952 A CN 102025952A CN 201010554422 CN201010554422 CN 201010554422 CN 201010554422 A CN201010554422 A CN 201010554422A CN 102025952 A CN102025952 A CN 102025952A
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luminance
pixel
sensor
brightness
step
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CN102025952B (en
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张海燕
彭春山
武海丽
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广东威创视讯科技股份有限公司
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Abstract

The invention relates to the technical field of display devices, in particular to brightness correction method and system for a display device. In the method, (1) brightness correction is carried out on more than one brightness sensor; (2) in the normal operation of the display device, the brightness values of the brightness sensors after brightness correction are used as the brightness value of pixel points corresponding to the brightness sensors; (3) brightness collecting interpolation is carried out on pixel points without the arrangement of the brightness sensors to obtain the brightness values corresponding to the pixel points; and (4) local brightness compensating factor calculation and brightness compensation are carried out to each pixel point. The brightness correction method and the brightness correction system have the characteristics of clear structure and simple calculation and are easy to realize, and when a single-screen brightness is corrected, the brightness compensation calculation is carried out by taking a small screen as a unit, therefore, the minimum compression of the brightness values of all the pixel points is avoided and the brightness loss is effectively reduced.

Description

一种显示装置亮度校正方法及其系统 An apparatus for displaying luminance correction method and system

技术领域 FIELD

[0001] 本发明涉及显示装置技术领域,特别是一种显示装置亮度校正方法及其系统。 TECHNICAL FIELD [0001] The present invention relates to a display, particularly to a method and apparatus brightness correction system display. 背景技术 Background technique

[0002] 投影拼接系统在商务会议、广告宣传、工业控制、交通监控等方面都有广泛应用,越来越多的领域对大屏幕显示设备和技术的需求也迅猛增长,但是,在拼接系统使用过程中常常遇到一个难题:如何实现拼墙亮度和色彩均勻性。 [0002] projection splicing systems are widely used in business meetings, advertising, industrial control, traffic monitoring, more and more areas of demand for large-screen display equipment and technology is also rapid growth, however, be used in splicing system process often encounter a problem: how to fight the wall brightness and color uniformity. 亮度和颜色均勻性便成为衡量投影拼接显示系统质量好坏的一个重要参数。 Brightness and color uniformity becomes an important parameter to measure the quality of the tiled display system of projection quality.

[0003] 投影拼接墙由单个投影显示单元组成,现有技术的单个投影显示单元的中心区域亮度大于边缘区域,即屏幕的暗边暗角现象。 [0003] Projection display wall consisting of a single projection unit, a single prior art projection display brightness is greater than the central region of the edge region of the unit, i.e. the dark side of the screen vignetting phenomenon.

发明内容 SUMMARY

[0004] 本发明的第一个发明目的在于提供一种显示装置亮度校正方法,以解决现有技术中单个投影显示单元的中心区域亮度大于边缘区域,即屏幕的暗边暗角现象的技术问题。 [0004] A first object of the present invention is to provide a method of displaying luminance correction means, in order to solve the prior art single central projection display unit is greater than the edge area luminance region, i.e. technical problem dark side of the screen vignetting phenomenon .

[0005] 为了实现本发明的第一个发明目的,采用的技术方案如下: [0005] To achieve the first object of the present invention, a technical solution as follows:

[0006] 一种显示装置亮度校正方法,显示装置上设有多个成行列排布的中央处理器, 每个中央处理器处理一个或多个亮度传感器,根据在显示装置上设置的多于一个的亮度传感器所得到的亮度对显示装置进行亮度补偿,所述方法还包括: [0006] A display device luminance correction method, a plurality of displays arranged in a matrix on the central processing unit, each central processor or a plurality of brightness sensors, according to more than one display device provided in the luminance brightness sensor obtained compensate the brightness of the display device, the method further comprising:

[0007] (1)对多于一个亮度传感器进行亮度校正; [0007] (1) more than one brightness sensor for brightness correction;

[0008] (2)进行亮度校正后,根据亮度传感器经过亮度校正后的亮度值作为亮度传感器所对应像素点的亮度值; After [0008] (2) the luminance correction, the luminance value of the luminance sensor after the luminance correction as the luminance values ​​of the luminance pixels of the sensor corresponding to;

[0009] (3)根据步骤(2)得到的亮度值对没有设置亮度传感器的像素点进行亮度采集插值获得对应像素点的亮度值; [0009] (3) according to step (2) of the luminance values ​​obtained luminance sensor is not provided in pixel luminance acquired luminance values ​​of corresponding pixels obtained by interpolation point;

[0010] (4)根据步骤(2)和步骤(3)获取的亮度值对每个像素点进行局部亮度补偿系数计算; [0010] (4) (3) acquired by the local luminance values ​​of the luminance compensation coefficient calculation according to step (2) step for each pixel;

[0011] (5)每个像素点根据亮度补偿系数进行亮度补偿,每个像素点的亮度值分别乘以亮度补偿系数后得到校正后的亮度值。 [0011] (5) for each pixel based on the luminance compensation coefficient to compensate the luminance, the luminance value of each pixel is multiplied by the luminance values ​​of the luminance compensation coefficient to obtain corrected.

[0012] 作为一种优选方案,所述方法包括: [0012] As a preferred embodiment, the method comprising:

[0013] (21)进行红色亮度校正,显示装置输出红色,执行步骤(1)〜(4),得到每个像素点的红色亮度补偿系数; [0013] (21) for correcting the luminance of red, the red display output means, step (1) to (4), to give a red luminance compensation coefficient of each pixel;

[0014] (22)进行绿色亮度校正,显示装置输出绿色,执行步骤(1)〜(4),得到每个像素点的绿色亮度补偿系数; [0014] (22) for correcting the luminance of green, the display device outputs green, step (1) to (4), a green luminance compensation coefficient of each pixel;

[0015] (23)进行蓝色亮度校正,显示装置输出蓝色,执行步骤(1)〜(4),得到每个像素点的蓝色亮度补偿系数; [0015] (23) for correcting the luminance of blue, blue display output means, step (1) to (4), to give a blue luminance of each pixel compensation coefficient;

[0016] 执行完红色亮度校正、绿色亮度校正及蓝色亮度校正后,执行步骤(5);[0017] 所述步骤(5)的亮度补充包括:对每个像素点执行如下操作: Brightness [0017] The step (5) comprises a supplementary; [0016] After performing luminance correction red, green and blue luminance correction luminance correction, step (5): Do the following for each pixel:

[0018] 每个像素点的红色亮度乘以红色亮度补偿系数得到校正后的红色亮度; [0018] The red luminance of each pixel is multiplied by the compensation coefficient obtained red red luminance corrected luminance;

[0019] 每个像素点的绿色亮度乘以绿色亮度补偿系数得到校正后的绿色亮度; [0019] green luminance of each pixel is multiplied by the compensation coefficient obtained green luminance green luminance after the correction;

[0020] 每个像素点的蓝色亮度乘以蓝色亮度补偿系数得到校正后的蓝色亮度。 [0020] The blue brightness of each pixel is multiplied by the compensation factor to obtain a blue luminance of the blue luminance after the correction.

[0021] 作为进一步的优选方案,所述步骤(1)包括: [0021] As a further preferred embodiment, the step (1) comprises:

[0022] 对每个传感器进行如下亮度校正: [0022] The following luminance correction for each sensor:

[0023] (31)控制显示装置输出; [0023] (31) controls the output display means;

[0024] (32)通过光照度测量装置测出传感器的传感器探测范围内的测试点的光照度值E61,并同时记录传感器的输出频率F1; [0024] (32) measuring means measure the light intensity of the test point sensor detection range of the sensor by the light illuminance value E61, and simultaneously record the output frequency of the sensor Fl;

[0025] (33)改变显示装置的亮度输出,并重复执行步骤(31),直到达到预先设定的亮度校正测量次数N,则执行步骤(34); [0025] (33) to change the brightness of the display output device, and repeating steps (31) until the number reaches a predetermined luminance correction measurements N, the step (34);

[0026] (34)根据N个光照度值Ea和N个输出频率F1,通过最小二乘法拟合得到Ea = kF.+f。 [0026] (34) The value of the illuminance of the N and N outputs Ea frequency F1, by a least square method Ea = kF. + F. 中的系数k和系数f。 The coefficient k and the coefficient f. ;

[0027] 所述步骤(2)包括:对每个传感器的输出值作以下修正得到亮度值f: [0027] The step (2) comprises: an output value of each sensor to obtain the correction of the luminance value as f:

[0028] f =IcFAf0o [0028] f = IcFAf0o

[0029] 作为进一步的优选方案,所述步骤(3)包括: [0029] As a further preferred embodiment, the step (3) comprises:

[0030] 以显示装置左下角端点为原点做出具有χ轴和y轴的笛卡尔坐标轴,对于每一个没有设置传感器且不与任意一个传感器处于同行或同列的第一像素点a,且所述第一类像素点a不超出传感器探测范围,执行以下插值操作: [0030] In the lower left corner to make a display terminal device having Cartesian axes χ and y-axes is the origin, no sensor is provided for each sensor and not with any peers or the same column in the first pixel a, and the said first class of a pixel sensor detection range does not exceed, the following interpolation operations:

[0031] 每一个第一类像素点a的坐标为(xa,ya),在点a左方及上方且与点a距离最近的传感器al的坐标为(xla,yla),根据步骤(2)得到的亮度值为fla;在点a右方及上方且与点a距离最近的传感器a2的坐标为(x2a,yla),根据步骤(2)得到的亮度值为f2a ;在点a左方及下方且与点a距离最近的传感器a3的坐标为(xla,y2a),根据步骤(2)得到的亮度值为f3a;在点a右方及下方且与点a距离最近的传感器a4的坐标为(x2a,y2a),根据步骤⑵得到的亮度值为f4a ; [0031] Each of a first type of pixel coordinates (xa, ya), at a point above and to the left, and a coordinate point closest to the sensor al (xla, yla), according to step (2) luminance value obtained FLA; at a point above and to the right, and a point closest to the sensor coordinate a2 (x2a, yla), obtained according to step (2) is the luminance F2a; and left at a point and a coordinate point downward and the nearest sensor is a3 (xla, y2a), obtained according to step (2) is the luminance F3A; at a point below and to the right, and a coordinate point closest to the sensor a4 (x2a, y2a), obtained according to step ⑵ F4a luminance value;

[0032] 具体步骤如下: [0032] The specific steps are as follows:

[0033] (41)在每一个第一类像素点a的χ轴方向进行插值计算,根据以下公式得到每一个第一类像素点a的正上方点的亮度值f(a〃 ): [0033] (41) interpolate each pixel a first type of χ-axis direction, the following formula to obtain the luminance value f (a〃) immediately above each of the first type of dot according to a pixel:

r π /·/ «λ __ Χ2α ~ Χα r ^ Χα~ Χ\α . f r π / · / «λ __ Χ2α ~ Χα r ^ Χα ~ Χ \ α. f

[0034] JW )--:~ ■ Jla +-:~ Jta ' [0034] JW) -: ~ ■ Jla + -: ~ Jta '

Χ2α “ Χ\α Χ2α Χ\α Χ2α "Χ \ α Χ2α Χ \ α

[0035] 每一个第一类像素点a的正下方点的亮度值f(a '): [0035] The luminance value f for each category immediately below the first point of a pixel (a '):

[0036] [0036]

X2a Xla Xla X\a X2a Xla Xla X \ a

[0037] (42)根据f(a")和f(a '),在每一个第一类像素点a的y轴方向进行插值计算,根据以下公式得到每一个第一类像素点a的亮度值f(a): [0037] (42), each interpolate a first pixel type a y-axis direction in accordance with f (a ") and f (a '), each of the first type to give a pixel luminance according to the following formula the value of f (a):

[0038] = [0038] =

y2a ~ yia y-ia ~ yu y2a ~ yia yia ~ yu

[0039] 作为进一步的优选方案,所述步骤(3)包括: [0039] As a further preferred embodiment, the step (3) comprises:

[0040] 以显示装置左下角端点为原点做出具有χ轴和y轴笛卡尔坐标轴,对于每一个没有设置传感器但与任意一个传感器处于同一列的第二类像素点b,且所述第二类像素点b不超出传感器探测范围,执行以下操作: [0040] In the lower left corner as the origin to make a display device having a terminal χ and y axes of the Cartesian axes, is not provided for each sensor but any sensor is a second type b pixels in the same column, and the first two types of pixel b does not exceed the range of the sensor detection, perform the following operations:

[0041] 每一个第二类像素点b的坐标为(xb,yb),在点b上方且与点b距离最近的传感器bl的坐标为(xlb,ylb),根据步骤(2)得到的亮度值为flb ;在点b下方且与点b距离最近的传感器b2的坐标为(xlb,y2b),根据步骤⑵得到的亮度值为f2b ; [0041] Each of the second type b is a pixel coordinate (xb, yb), above the point b and the coordinate point of the nearest sensor bl b is (xlb, ylb), obtained according to step (2) Brightness FLB value; below the point b and point b and b2 is nearest the sensor coordinates (xlb, y2b), obtained according to step F2b ⑵ luminance value;

[0042] 对每一个第二类像素点b的y轴方向进行插值计算,根据以下公式得到每一个第二类像素点b的亮度值f(b) [0042] The interpolation calculation performed for each of the second type b pixels y-axis direction to obtain a second type for each pixel of the luminance value F b (b) according to the following formula

[0043] [0043]

Figure CN102025952AD00081

[0044] 作为进一步的优选方案,所述步骤(3)包括: [0044] As a further preferred embodiment, the step (3) comprises:

[0045] 以显示装置左下角端点为原点做出具有x轴和y轴笛卡尔坐标轴,对于每一个没有设置传感器但与任意一个传感器处于同一行的第三类像素点C,且所述第三类像素点C 不超出传感器探测范围,执行以下操作: [0045] In the lower left corner as the origin to make a display terminal device having an x-axis and y-axis Cartesian coordinate axes, for each of the sensor but is not provided in any of a third type of sensor pixel point C in the same row, and the first C does not exceed three pixel sensor detection range, perform the following operations:

[0046] 每一个第三类像素点c的坐标为(x。,yc),在点C左方且与点C距离最近的传感器cl的坐标为(Xl。,ylc),根据步骤(2)得到的亮度值为^。 [0046] The third coordinate of each pixel is c (x., Yc), the left point C and the point C to the coordinates of the nearest sensor is cl (Xl., Ylc), according to step (2) ^ luminance value obtained. ;在点c右方且与点c距离最近的传感器c2的坐标为(Xl。,y2c),根据步骤(2)得到的亮度值为f2。 ; And at the right point to the coordinate point c c nearest sensor c2 is (Xl, y2c.), According to step (2) to give the luminance value f2. ;

[0047] 对每一个第三类像素点C的x轴方向进行插值计算,根据以下公式得到每一个第三类像素点C的亮度值f(c) [0047] The interpolation calculation performed for each of the third pixel type C x-axis direction to obtain a third category for each luminance value f (c) pixel according to the formula C

[0048] [0048]

Figure CN102025952AD00082

[0049] 作为进一步的优选方案,所述步骤(3)包括: [0049] As a further preferred embodiment, the step (3) comprises:

[0050] 对于每一个超出传感器探测范围的第四类像素点d,执行以下操作: [0050] For each sensor exceeds the detection range of the fourth pixel type d, perform the following operations:

[0051] 寻找与每一个第四类像素点d距离最近的第一传感器、第二传感器和第三传感器; [0051] Looking to the fourth class of each pixel d from the nearest sensor of the first, second and third sensors;

[0052] 第一传感器与第四类像素点d的距离为Lp第二传感器与第四类像素点d的距离为L2,第三传感器与第四类像素点d的距离为L3,第一传感器根据步骤(2)得到的亮度值为Y1,第二传感器根据步骤(2)得到的亮度值为Y2,第三传感器根据步骤(2)得到的亮度值为Y3,令L = L!+L2+L3 : [0052] The first sensor pixel distance d is the distance Lp fourth class and fourth class of the second sensor is d pixels L2, from the third sensor and the fourth pixel type d is L3, a first sensor according to step (2) to give the luminance value Y1, a second sensor in accordance with step (2) to give the luminance value Y2, the third sensor in accordance with step (2) of the luminance values ​​obtained Y3, so that L = L! + L2 + L3:

[0053] 如果k > L2 > L3,则每一个第四类像素点d的亮度值Y为: [0053] If k> L2> L3, the fourth class of each pixel of the luminance value Y d:

[0054] [0054]

Figure CN102025952AD00083

[0055] 如果k = L2,且Y1 > Y2,则每一个第四类像素点d的亮度值Y为: [0055] If k = L2, and Y1> Y2, the fourth class of each pixel luminance value Y d is:

[0056] [0056]

[0057] 如果= L2,且Y1 < Y2,则每一个第四类像素点d的亮度值Y为: [0057] If = L2, and Y1 <Y2, the fourth class of each pixel luminance value Y d is:

[0058] [0058]

[0059] 如果L2 = L3,且Y2>Y3,则每一个第四类像素点d的亮度值Y为:[0060] [0059] If L2 = L3, and Y2> Y3, a fourth class of the luminance value of each pixel Y d is: [0060]

Figure CN102025952AD00091

[0061] 如果L2 = L3,且Υ2<Υ3,则每一个第四类像素点d的亮度值Y为: [0061] If L2 = L3, and Υ2 <Υ3, the fourth class of each pixel luminance value Y d is:

[0062] [0062]

Figure CN102025952AD00092

[0063] 传感器安装板上探测器能覆盖的面积小于显示屏幕,如说明书附图6所示,以传感器安装板上第一行最左端、最右端传感器及传感器最后一行最左端、最右端四个传感器组成的四边形为探测器能探测到的范围,超出该四边形的显示屏幕上的像素点为探测器不能探测到的范围,即超出传感器探测范围。 [0063] The area sensor mounting plate detectors can cover less than the display screen, as shown in the accompanying drawings 6, the sensor mounting plate to the first row leftmost, rightmost last line sensors and sensor leftmost, rightmost four quadrangular sensors of the detector can detect a range beyond the pixels on the display screen of the quadrilateral detector can not detect the range, i.e., beyond the detection range of the sensor.

[0064] 作为进一步的优选方案,所述步骤(4)包括: [0064] As a further preferred embodiment, the step (4) comprises:

[0065] 将显示装置划分为M个区域,以中央处理器及其所处理的传感器作为一个区域,对每个区域进行局部亮度补偿系数计算,所述区域为矩形,每个中央处理器所处理的最上方亮度传感器所探测到的行位置为每个区域的顶端横向边界线,每个中央处理器所处理的最下方亮度传感器所探测到的行位置为每个区域的底端横向边界线,每个中央处理器所处理的最左方亮度传感器所探测到的列位置为每个区域的左端纵向边界线,每个中央处理器所处理的最右方亮度传感器所探测到的列位置为每个区域的右端纵向边界线. [0065] The display device is divided into M areas, the central processor and processed as a sensor area, local brightness compensation coefficient calculated for each area, a rectangular area, each central processor processed the luminance sensor top the detected position to the top row of the lateral boundary of each region, the brightness of each of the bottom sensor central processor processed the detected position of the bottom end of each row region lateral boundary lines, brightness sensor leftmost each central processor processed the detected position of the left end of each column of the vertical boundary line area, the rightmost luminance sensor each central processor processed the detected position of each column a right end regions of the longitudinal boundary line.

一入, Into a,

[0066] 对于显示装置的第一行中央处理器,其区域顶端横向边界线扩展为显示装置像素点的第一行; [0066] For the first line of the central processor unit, which boundary regions extend transversely to the top of the first row of pixels of the display device;

[0067] 对于显示装置的最后一行的中央处理器,其区域底端横向边界线扩展为显示装置像素点的最后一行; [0067] For the last line of the central processor of the display device, which bottom region lateral boundaries extended line of the last line of pixels means;

[0068] 对于显示装置的第一列中央处理器,其区域左端纵向边界线扩展为显示装置像素点的第一列; [0068] Referring to a first column of central processor unit, which boundary region of the left longitudinal extension of the first column of the display pixel of the device;

[0069] 对于显示显示装置的最后一列中央处理器,其区域右端纵向边界线扩展为显示装置像素点的最后一列; [0069] Finally, the display processor displays a central unit, which boundary region right longitudinal extension of a last pixel display device;

[0070] 具体亮度补偿系数计算方法如下: [0070] DETAILED luminance compensation coefficient is calculated as follows:

[0071] 4)计算每个区域中像素点的亮度平均值U,以及整个显示装置所有像素点的亮度平均值C; [0071] 4) Calculate the average value of luminance in each region of U pixel, and the brightness of all pixels in the entire display device C average;

[0072] 5)查找每个区域中的亮度最小值; [0072] 5) Find the minimum luminance in each region;

[0073] 6)将每个区域的亮度平均值Ci与整个屏的亮度平均值Ϊ:做比较,计算区域亮度补偿系数g: [0073] 6) The average value of the luminance of each region Ϊ average luminance of the entire screen Ci: compare, area luminance calculating compensation coefficient g:

[0074] a)如果I: > I令每个像素点亮度补偿系数S = J^l,Lmm表示i区域中所有像素点的亮度最小值,Lsdf表示i区域中每个像素点自身的亮度值; [0074] a) If the I:> I so that every pixel luminance compensation coefficient S = J ^ l, Lmm i represents a region all pixels of the luminance minimum, Lsdf i represents each pixel area the luminance value itself ;

[0075] b)如果<1,比较i区域中每个像素点的亮度值1^与丨区域中的亮度平均值ζ。 [0075] b) If <1, the area comparison i luminance value of each pixel of a luminance average value ζ ^ Shu region. 若<!:.令g = i;反之,若L.>r.令容=|。 If <:! Let g = i; the other hand, if L.> r = capacity make |..

1 1 5 1 ', Lf 1 1 5 1 ', Lf

[0076] 本发明的第二个发明目的在于提供一种显示装置亮度校正系统,以实现本发明的第一个发明目的所提出的校正方法。 [0076] A second object of the present invention is to provide a display device luminance correction system in order to achieve the object of a correction method of the present invention is proposed.

[0077] 为了实现本发明的第二个发明目的,采用的技术方案如下: [0077] To achieve the second object of the present invention, a technical solution as follows:

[0078] 一种显示装置亮度校正系统,所述系统包括: [0078] The brightness correction system of a display apparatus, said system comprising:

[0079] 在显示装置上设有多个成行列排布的中央处理器,每个中央处理器处理一个或多个亮度传感器,所述系统还包括依次连接的亮度校正模块、亮度获取模块、亮度插值模块和亮度补偿模块: [0079] provided on the display device in a matrix arrangement of a plurality of central processors, each central processor or a plurality of brightness sensors, the system further comprises a luminance correction module connected sequentially, the luminance obtaining module, luminance interpolation module and a brightness compensating module:

[0080] 亮度校正模块用于对多于一个亮度传感器进行亮度校正; [0080] The luminance correction means for more than one brightness sensor for brightness correction;

[0081 ] 亮度获取模块在显示装置正常运行中,获取根据亮度传感器经过亮度校正后的亮度值作为亮度传感器所对应像素点的亮度值; [0081] In the display device luminance obtaining module in normal operation, the luminance value of the luminance sensor acquired after luminance correction luminance value as the luminance of pixels corresponding to the sensor;

[0082] 亮度插值模块根据亮度获取模块获取的亮度值对没有设置亮度传感器的像素点进行亮度采集插值获得对应像素点的亮度值; [0082] The luminance interpolation module not provided with a brightness sensor pixel luminance values ​​of the luminance obtained by interpolation collection corresponding pixel luminance value acquiring module acquires the luminance based;

[0083] 亮度补偿模块根据亮度获取模块和亮度插值模块获取的亮度值对每个像素点进行亮度补偿系数计算,并根据亮度补偿系数对每个像素点进行亮度补偿。 [0083] The luminance compensation module calculates a luminance value module and a luminance acquiring module acquires luminance interpolation coefficients for luminance compensation is performed for each pixel in accordance with, and to compensate the brightness of each pixel based on the luminance compensation coefficient.

[0084] 本发明具有结构清晰、计算简单、易于实现的特点。 [0084] The present invention has a clear structure, calculation is simple, easy to implement the features. 结合系统给出了一个解决拼接墙单屏亮度不均勻性的完整方法,在校正单屏亮度时,按传感器安装板上MCU的排列将单屏分割成多个“小屏幕”,以“小屏幕”为单位进行亮度补偿计算,避免了将所有像素点的亮度值进行最小压缩,有效减少了亮度损失。 A complete binding system inhomogeneity single screen brightness of a video wall solution, when the screen brightness correction unit, according to the arrangement of the sensor mounting plate MCU single screen is divided into a plurality of "small screen", "small screen "brightness compensation calculation units, avoids luminance values ​​of all pixels in the minimum compression, effectively reducing the loss of luminance.

附图说明 BRIEF DESCRIPTION

[0085] 图1为亮度采集系统示意图; [0085] FIG. 1 is a schematic brightness acquisition system;

[0086] 图2为传感器工作原理示意图; [0086] FIG. 2 is a schematic view of the working principle of the sensor;

[0087] 图3为投影仪亮度采集人机交互界面; [0087] FIG. 3 is a projector brightness acquisition interactive interface;

[0088] 图4为异行异列点a的双线性亮度插值示意图; [0088] FIG. 4 is a different line of luminance iso bilinear interpolation point a schematic columns;

[0089] 图5为同行或同列点b、C的双线性亮度插值示意图; [0089] FIG. 5 is a peer or point b with a column, a bilinear interpolation of the luminance C of the schematic diagram;

[0090] 图6为安装板上的传感器区域划分图。 [0090] FIG. 6 is a view of a mounting area division sensor plate.

具体实施方式 Detailed ways

[0091] 下面结合附图和具体实施例对本发明做进一步详细的说明。 [0091] conjunction with the accompanying drawings and the following specific examples further illustrate the present invention in detail.

[0092] 本发明实施例为了采集显示器的亮度值,设计了装有亮度传感器的安装板,如图1所示。 [0092] Example embodiments of the present invention in order to collect the value of the display luminance, a brightness sensor is designed with mounting plate, as shown in FIG. 传感器安装板上有9X12个MCU(即中央处理器),每个MCU上有9个传感器。 9X12 sensor mounting board has a MCU (i.e., Central Processing Unit), nine sensors on each MCU. MCU尺寸为:93X93mm,MCU和MCU之间的间隔为6mm,MCU上每个传感器之间的间隔为33mm,传感器与MCU边缘之间的距离为13.5mm。 MCU size: 93X93mm, the interval between the MCU and the MCU is 6mm, the spacing between each sensor on the MCU is 33mm, the distance between the sensor and the edge of the MCU is 13.5mm.

[0093] 控制投影仪机芯,在投影仪屏幕上分别显示红、绿、蓝,得到显示屏幕上每个像素点的亮度之后,在分别针对红、绿、蓝三种颜色按文中方法计算不同颜色下每个像素点的补偿系数Gr、Gg、Gb。 [0093] The movement control of the projector, are displayed on the projector screen, red, green, and blue, to obtain the brightness of each pixel on the display screen after, respectively for the red, green and blue colors calculated by different methods described in compensation coefficient for each pixel in the color Gr, Gg, Gb. 将补偿系数编程嵌入投影仪机芯中,机芯就会自动将原来像素点的RGB值分别与各自的补偿系数做乘积之后的RGB值作为新的像素点值去显示图像。 The compensation coefficient value after programming embedded RGB projector movement, the movement will automatically original RGB pixel values ​​are the respective coefficients to make the product as a compensation pixel value to a new display image.

[0094] 利用传感器安装板对显示器亮度值进行校正主要分为三个步骤:传感器校正、 亮度采集插值、局部亮度补偿系数计算。 [0094] The display brightness values ​​were corrected using the sensor mounting plate is divided into three steps: sensor calibration, acquisition luminance interpolation, the local luminance compensation coefficient calculation. [0095] 一:传感器校正 [0095] a: Sensor Calibration

[0096] 选用的传感器为亮度传感器,当光刺激照射到传感器上时,传感器就相应输出一个频率值,如图2所示。 [0096] brightness sensor selected sensor, when light is irradiated onto the sensor stimulation, the sensor output corresponding to a frequency value, as shown in FIG. 光照度不同,输出频率值就不同。 Different illumination, the output frequency value is different. 传感器输出频率值和光照度值之间满足线性关系:Ea = kF+f。 Satisfy the linear relationship between sensor output value and frequency light luminance value: Ea = kF + f. (其中巧为传感器输出频率,Ea为传感器接收到的光照度)。 (Qiao wherein the sensor output frequency, Ea received light level sensor). 而且,对于不同的传感器,输出频率和光照度之间的线性关系不同。 Furthermore, different for different linear relationship between the sensor output frequency and light intensity. 传感器校正的目的就是:确定每个传感器的k、f。 Sensor calibration purpose is: each sensor to determine k, f. 值。 value. 当投影仪的光照射到传感器上时,可以根据传感器输出频率值计算出投影仪的光照度值。 When the projector is incident on the light sensor, the light intensity value can be calculated based on the sensor output of the projector frequency value.

[0097] 控制投影仪的亮度值,在投影仪亮度范围内选取20个点,用照度计分别测出所选亮度值对应的照度值,并编程计算得到与之对应的20个频率值。 [0097] The luminance control value projector, selected 20 points in the projector brightness range, respectively measured illuminance value corresponding to the luminance value selected by the illuminometer, and programmed to calculate the corresponding frequency value 20. 这样就得到20组数据:(Fi、EJ、(F2、Ee2)......(F20,艮2(1)。然后通过最小二乘法拟合得到: Thus obtained 20 sets of data:. (Fi, EJ, (F2, Ee2) ...... (F20, Gen 2 (1) and then through the least square method:

[0098] Eei = kFi+f。 [0098] Eei = kFi + f. (1) (1)

[0099] 对108个传感器均做上述处理,这样就实现了对不同传感器的校正。 [0099] The sensors 108 are made the above process, thus achieving a correction of the different sensors. 为了方便测试人员进行测试,针对一个MCU设计了人机交互界面,如图3所示。 To facilitate testing personnel to test for a man-machine interface of the MCU design, as shown in FIG.

[0100] 1) 一个MCU上有9个传感器,将其编号为1-9,下拉菜单可以选择传感器编号,下面的亮度、照度、频率、k值、f。 [0100] 1) has a MCU 9 sensors, which are numbered 1-9, the pull-down menu to select a sensor number, the following luminance, illuminance, frequency, k value, f. 值与所选传感器相对应。 Value corresponds to the selected sensor.

[0101] 2)亮度下拉菜单可以控制投影仪的亮度。 [0101] 2) drop-down menu control the brightness of the brightness of the projector.

[0102] 3)20个照度值数据已测得,可以作为常量直接存储,点击照度值下拉菜单选择照度值。 [0102] 3) 20 have been measured illuminance value data can be stored directly as a constant, the value of the pull-down menu to select click illuminance an illuminance value. 注:已测得的照度值与选定的亮度值一一对应。 NOTE: illuminance value of the measured luminance value of the selected one correspondence.

[0103] 4)选择好照度值后,点击频率的“计算”按钮,MCU计算9个传感器在当前照度值下各自对应的输出频率值,并反馈给PC存储;点击频率的“显示”按钮,显示当前选中的传感器及照度对应的传感器输出频率值。 After [0103] 4) choosing luminance value "computing" button click frequency, the MCU calculates the output frequency value 9 sensors under the current illuminance value corresponding to each, and the feedback to the PC memory; click frequency of the "display" button, displaying the selected sensor output frequency value corresponding to the sensor current and illuminance.

[0104] 5)当20个频率值测试完毕之后,显示满足传感器光照度和输出频率关系式的最佳k、f。 [0104] 5) When the frequency value of 20 test is completed, the display offers great k and the output frequency of the light sensor relational expression, f. 值,并传送给MCU。 Value, and transmits to the MCU.

[0105] 二:亮度采集插值 [0105] II: luminance interpolation collection

[0106] 从传感器安装板示意图(如图1所示)上可以看出,该板并不能采集到显示屏幕上每个像素点的亮度值,这就需要对未采集到的像素点亮度值就行插值计算。 [0106] (1) It can be seen from the schematic diagram of the sensor mounting plate which can not be collected and the luminance value of each pixel on the display screen, which requires not collected pixel luminance value on the line interpolation.

[0107] 进行亮度插值时,根据待插值点的分布位置:传感器探测范围内和传感器探测范围外,采用不同的插值方法。 [0107] When the luminance interpolation, depending on the location of the point to be interpolated: an outer sensor within the sensor detection range and the detection range, using different interpolation methods. 在传感器探测范围内选用双线性插值方法对投影仪的亮度值进行插值计算,对于超出传感器探测范围的点,受周边传感器个数限制,则选用距离加权插值方法进行亮度插值。 Bilinear interpolation method selection within the sensor detection range of the luminance value calculated by interpolating the projector, to a point beyond the detection range of the sensor, the number of sensors is limited by the surrounding, is chosen from a weighted interpolation luminance interpolation.

[0108] 1)传感器探测范围内的双线性插值 Bilinear interpolation within [0108] 1) a sensor detection range

[0109] a)当插值点与传感器测量点异行或异列时 When [0109] a) When the interpolation points and the measurement points different lines or different columns

[0110] 点a为与传感器测量点异行或异列的亮度插值目标点,要求得点a的亮度值,需要先在X方向进行插值得到点a正上方a"点和正下方a'点(两个点与传感器采集点在同一行上)的亮度值。假设与点a(x,y)距离最近的四个传感器实际测量值从左到右、 从上到下分别为fi、f2、f3、f4,像素点位置从左到右、从上到下分别为:(Xl,yi)、(x2, yi)> (x1? y2)、(x2, y2),如图4 所示。 [0110] point a luminance interpolation target point with the sensor measuring point different rows or different columns, required to obtain a luminance value of the point a, need to be in the X-direction interpolation to obtain a point A directly above a "point and just below the point a '(two collection point and the sensor points luminance value on the same line) assuming that the point a (x, y) closest actual measurement values ​​of four sensors left to right, top to bottom, respectively, fi, f2, f3, f4, the pixel position from left to right, top to bottom are: (Xl, yi), (x2, yi)> (? x1 y2), (x2, y2), as shown in FIG.

[0111] 则点a正上方点的亮度值f(a")为: [0111] the dot luminance value f (a ") a point immediately above is:

[0112]X2 -Xi X2 - Χι (2) [0112] X2 -Xi X2 - Χι (2)

[0113] 点a正下方点的亮度值f(a ')为: [0113] point a luminance value f (a ') is directly below the point:

[0114] [0114]

X2-X1 X2-X1 (3) X2-X1 X2-X1 (3)

[0115] 其次在y方向进行插值,得到点a的亮度值f(a)为: [0115] Next interpolating the y-direction, a point obtained luminance value f (a) is:

[0116] = + [0116] + =

L 」 y2_y! (4) L "y2_y! (4)

[0117] b)当插值点与传感器测量点同列或同行时 When [0117] b) When the interpolation points and the measuring point in the same column or peer

[0118] 点b、C分别为与传感器测量点同列、同行的亮度插值目标点。 [0118] Point b, C are the same measuring point and the sensor columns, accompanied by luminance interpolation target point. 其双线性亮度插值示意图如图5所示: Which is bilinear interpolation luminance schematic diagram shown in Figure 5:

[0119] 对于点b,直接进行y轴插值,得到b点的亮度值f(b)为: [0119] For the points b, direct y-axis interpolation to obtain the luminance value f (b) b points is:

[0120] = (5) [0120] = (5)

y2 -^i y2 - y2 - ^ i y2 -

[0121] 对于点C,直接进行X轴插值,得到c点的亮度值f(c)为: [0121] For the points C, the X-axis direct interpolation point c obtained luminance value F (c) is:

[0122] [0122]

f{c) = ^iZL. fi+IZI^. fi f {c) = ^ iZL. fi + IZI ^. fi

X2 X1 X2 X\ (6) X2 X1 X2 X \ (6)

[0123] 2)传感器探测范围外的距离加权插值 From an outer [0123] 2) Sensor detection range weighted interpolation

[0124] 对于超出传感器探测范围的点,寻找与插值点距离最近的3个传感器采集点, 则目标插值点的亮度值为: [0124] to a point beyond the detection range of the sensor, the brightness of the interpolation point to find the nearest three sensor acquisition points, the target point is interpolated values:

(\ \ (Λ \ (Λ \ (\ \ (Λ \ (Λ \

[0125] Υ= ^ -Yi+ Mr Τ" ΓΥ3 [0125] Υ = ^ -Yi + Mr Τ "ΓΥ3

LLJ ( LJLLJ (7) LLJ (LJLLJ (7)

[0126] 其中,L1表示目标插值点和传感器采集点之间的最大距离,L2次大,L3最小; L = Li+L2+L3;传感器采集到的三个点的亮度值分别为:Υι、γ2、Y3,其中Y1为距离目标插值点最远的传感器采集点对应的亮度值,Y2为距离目标插值点次远的传感器采集点对应的亮度值,Y3为距离目标插值点最近的传感器采集点对应的亮度值。 [0126] wherein, Ll represents the maximum distance between the target and the sensor acquisition point interpolation points, L2 the second largest, the smallest L3; L = Li + L2 + L3; luminance sensor value acquired three points are: Υι, γ2, Y3, wherein Y1 is furthest from the target luminance value of the interpolation point corresponding to the point sensor acquisition, Y2 times luminance value interpolation points target distances corresponding to the sensor collection point, Y3 interpolation points from the target to the nearest sensor collection point corresponding luminance value. 当距离相等时,令亮度值大的采集点的贡献度大;若亮度值也相等,则相等的两个距离排序可不分先后。 When the same distance, so that a large contribution of luminance values ​​larger collection point; if the luminance values ​​are equal, then the two distances are equal it can be sorted in alphabetical order.

[0127] 如果L1 = L2,且Υ1<Υ2,则每一个第四类像素点d的亮度值Y为: [0127] If L1 = L2, and Υ1 <Υ2, the fourth class of each pixel luminance value Y d is:

(1 Λ (Λ \ (Ί \ (1 Λ (Λ \ (Ί \

[0128] Y= -Y1+ y- -Y2+ Y3 [0128] Y = -Y1 + y- -Y2 + Y3

VL ^ ^L y νL y , VL ^ ^ L y νL y,

[0129] 如果L2 = L3,且Υ2>Υ3,则每一个第四类像素点d的亮度值Y为: [0129] If L2 = L3, and Υ2> Υ3, the fourth class of each pixel luminance value Y d is:

A ^ fh Λ iL λ A ^ fh Λ iL λ

[0130] Υ= "Γ Υι+ Τ" Υ3+ "Γ ·Υ2 [0130] Υ = "Γ Υι + Τ" Υ3 + "Γ · Υ2

< y ν JV y , <Y ν JV y,

[0131] 如果L2 = L3,且Υ2<Υ3,则每一个第四类像素点d的亮度值Y为: [0131] If L2 = L3, and Υ2 <Υ3, the fourth class of each pixel luminance value Y d is:

Figure CN102025952AD00131

[0133] 三:局部亮度补偿系数计算 [0133] III: local luminance compensation coefficient calculation

[0134] 获得了每个像素点的亮度值之后,对像素点进行逐点校正,还需要寻找各个像素点的补偿系数。 After [0134] the luminance value obtained for each pixel, the pixel point-by-point correction, but also need to find the compensation coefficient of each pixel. 在设计算法时需要注意: In the design of the algorithm should be noted:

[0135] 1)需要分别考虑R、G、B三种颜色的补偿系数,控制投影仪机芯,在投影仪屏幕上分别显示红、绿、蓝,通过上文所述步骤得到显示屏幕上每个像素点的亮度之后, 再分别针对红、绿、蓝三种颜色计算不同颜色下每个像素点的补偿系数,即可得到Gr、 Gg、Gb; [0135] 1) to consider R, G, B three color compensation coefficients, respectively, to control the movement of the projector, red, green, and blue, respectively, on the projector screen, on the display screen obtained by each of the above steps after the luminance of a pixel, then for each of red, green and blue colors for each pixel compensation coefficients calculated in different colors, can be obtained Gr, Gg, Gb;

[0136] 2)在进行逐点校正时,每个像素点的R、G、B补偿系数都不能大于1。 [0136] 2) when performing calibration point by point, R, G, B of each pixel in the compensation coefficient can not be greater than 1.

[0137] 以下叙述以红色为例,其他两种颜色采用相同方法。 [0137] The following describes an example in red, the other two colors using the same method.

[0138] 传感器安装板示意图如图1所示。 [0138] sensor mounting plate is shown in Fig.1. 安装板上有9X 12个MCU,每个MCU上有9个传感器,即:传感器安装板上有9行12列MCU,每个MCU上有3行3列传感器。 With a mounting plate 9X 12 th MCU, nine sensors on each MCU, namely: a sensor mounting plate 9 rows and 12 columns MCU, the sensor has three rows and three columns on each MCU. 将显示屏分为9X12个小区域,把每一块区域当成是一个“小屏幕”,然后进行逐点校正。 The display is divided into small regions 9X12, as is the area of ​​each one a "small screen", and then corrected point by point.

[0139] 进行区域划分时为描述方便,先说明区域边界线(包括横向和纵向)的划分方法,如图6虚线所示。 [0139] When the regional division of convenience of description, the first region boundary description (including horizontal and vertical) of the dividing method, as shown in dashed lines. 相邻两横向和相邻两纵向边界线的四个交点即为每块区域的四个顶点,确定了顶点即可得出每块区域各自的范围。 Two transverse and two longitudinal intersection of four adjacent boundary lines is the four vertices of each region, determining a respective vertices can be derived in a range adjacent to each area.

[0140] 横向边界线:显示器像素点的第一行为顶端的横向边界线,第一行MCU的第三行传感器探测到的行位置为边界线的第二行此行传感器探测点所在行的下一行作为边界线的第三行,第二行MCU的第三行传感器探测到的行位置为边界线的第四行,同样,该行传感器探测点所在行的下一行为边界线的第五行,以此类推,显示器像素点的最后一行为低端的横向边界线。 [0140] lateral boundary: a boundary line transverse to the top of the first row of the display pixel, the MCU first row to a third row line sensor detects the position of the boundary line of the second row line sensor detects this point where the line line as the boundary line of the third row, the second row the third row MCU line sensor detects a position of the boundary line of the fourth row, the same, the behavior of the next line of the line sensor detects the point where the boundary line of the fifth row, so, the final display behavior of the lower end pixel line of the lateral boundaries.

[0141] 纵向边界线:同理,显示器像素点的第一列为纵向边界线的最左端,第一列MCU的第三列传感器探测到的列位置为边界线的第二列,此列传感器探测点所在列的下一列为边界线的第三列,第二列MCU的第三列传感器探测到的列位置为边界线的第四列,以此类推,显示器像素点的最后一列为纵向边界线的最右端。 [0141] longitudinal boundary line: Similarly, the first column of the display pixel leftmost vertical boundary line, the first row of the third column MCU column position sensor detects a boundary line of the second column, this column sensor the column of the next detection point as a boundary line of the third column, the third row second column MCU column position sensor detects a boundary line of the fourth column, and so on, and finally as a longitudinal boundary pixels of the display the far right line.

[0142] 相邻两行与相邻两列边界线的四个交点即为小区域的顶点,这样就将显示屏划分为9X12个小区域,然后分情况进行逐点校正,具体方法如下: [0142] two adjacent rows and two adjacent boundary lines is the intersection of four vertices of small regions, so that the display will be divided into small areas 9X12, and then sub-situation-point correction, as follows:

[0143] 1)计算每个小区域中的亮度平均值C1、L2 L108以及整个屏幕的亮度平均值I:· [0143] 1) Calculate the average luminance for each small region C1, L2 L108 and the average luminance of the entire screen I: ·

、… , 9 ,… , 9

[0144] 2)查找每个小区域中的亮度最小值; [0144] 2) find the minimum brightness of each small area;

[0145] 3)将每个小区域的亮度平均值〔(《_ε[1,108])与整个屏的亮度平均值2;做比较: [0145] 3) The average value of luminance for each small region [( "_ε [1,108]) and the average luminance of the entire screen 2; compare:

[0146] a)如果Ε. 2 Ϊ令众=^ ' Lmin表示i区域中所有像素点的亮度最小值,Lsdf表 [0146] a) If Ε. 2 Ϊ make public = ^ 'Lmin indicates the luminance of all pixels in the minimum area i, Lsdf table

'一, ^elf 'A, ^ elf

示i区域中每个像素点自身的亮度值; Each pixel luminance values ​​are shown in the i region itself;

[0147] b)如果G < Γ比较i区域中每个像素点的亮度值L1与i区域中的亮度平均值ζ [0147] b) If G <brightness of each pixel of the comparison value Γ i ζ L1 region with the average luminance of the area i

7 ο 7 ο

若L.<Z:令Gr=I;反之,若ljZ:令Gr = ^; 1 1 ? If L. <Z: Order Gr = I; the other hand, if ljZ: Order Gr = ^; 1 1? 1 1 > M[0148] 求出所有区域每个像素点的Gr值之后,将其做成数据表,传达给信号处理模块,实现亮度逐点校正。 1 1> M [0148] After obtaining the value of each pixel Gr all regions, which will make the data table, communicated to the signal processing module, a luminance-point correction. 这样就避免了将所有像素点的亮度值进行最小压缩。 This avoids the luminance values ​​of all pixels minimum compression.

[0149] 上述的Gr仅为红色的亮度补偿系数,可以根据上述方式,计算绿色及蓝色的补偿系数Gg及Gb。 [0149] The brightness of the red Gr only compensation coefficients, according to the above-described embodiment, green, and blue is calculated compensation coefficient Gg and Gb.

[0150] 如上所述,便可较好地实现本发明,上述实施例仅为本发明的较佳实施例,并非用来限定本发明的实施范围;即凡依本发明内容所作的均等变化与修饰,都为本发明权利要求所要求保护的范围所涵盖。 [0150] As described above, the present invention can be preferably implemented, the above-described embodiments are merely preferred embodiments of the present invention, not intended to limit the scope of embodiments of the present invention; i.e., where the equivalent changes made under this invention with the content of modified, the scope of the claims are encompassed by the present invention as claimed.

Claims (9)

1. 一种显示装置亮度校正方法,显示装置上设有多个成行列排布的中央处理器,每个中央处理器处理一个或多个亮度传感器,根据在显示装置上设置的多于一个的亮度传感器所得到的亮度对显示装置进行亮度补偿,其特征在于,所述方法还包括:(1)对多于一个亮度传感器进行亮度校正;(2)进行亮度校正后,根据亮度传感器经过亮度校正后的亮度值作为亮度传感器所对应像素点的亮度值;(3)根据步骤(2)得到的亮度值对没有设置亮度传感器的像素点进行亮度采集插值获得对应像素点的亮度值;(4)根据步骤(2)和步骤(3)获取的亮度值对每个像素点进行局部亮度补偿系数计算;(5)每个像素点根据亮度补偿系数进行亮度补偿,每个像素点的亮度值分别乘以亮度补偿系数后得到校正后的亮度值。 A method for correcting brightness of the display device, a display arranged in a matrix is ​​provided with a plurality of central processor unit, each central processor or a plurality of brightness sensors, according to more than one device provided on a display the resulting luminance brightness sensor to compensate the brightness display device, wherein said method further comprises: (1) more than one brightness sensor for brightness correction; (2) the luminance correction, the luminance sensor after luminance correction luminance values ​​as the luminance sensor luminance values ​​of pixels corresponding points; (3) according to step (2) the luminance value obtained for not set a brightness sensor pixel brightness acquisition interpolated to obtain a corresponding pixel luminance value; (4) (3) acquired by the luminance value calculating according to step (2) for each pixel and the step of local luminance compensation coefficient; (5) for each pixel based on the luminance compensation coefficient to compensate the luminance, the luminance values ​​of each pixel are multiplied by to obtain a corrected luminance value of the luminance compensation coefficient.
2.根据权利要求1所述的校正方法,其特征在于,所述方法包括:(21)进行红色亮度校正,显示装置输出红色,执行步骤(1)〜(4),得到每个像素点的红色亮度补偿系数;(22)进行绿色亮度校正,显示装置输出绿色,执行步骤(1)〜(4),得到每个像素点的绿色亮度补偿系数;(23)进行蓝色亮度校正,显示装置输出蓝色,执行步骤(1)〜(4),得到每个像素点的蓝色亮度补偿系数;执行完红色亮度校正、绿色亮度校正及蓝色亮度校正后,执行步骤(5); 所述步骤(5)的亮度补充包括:对每个像素点执行如下操作: 每个像素点的红色亮度乘以红色亮度补偿系数得到校正后的红色亮度; 每个像素点的绿色亮度乘以绿色亮度补偿系数得到校正后的绿色亮度; 每个像素点的蓝色亮度乘以蓝色亮度补偿系数得到校正后的蓝色亮度。 2. The calibration method according to claim 1, characterized in that, said method comprising: (21) for correcting the luminance of red, the red display output means, step (1) to (4), to give each pixel red luminance compensation coefficient; (22) for correcting the luminance of green, the display device outputs green, step (1) to (4), a green luminance compensation coefficient of each pixel; (23) with a blue luminance correction, the display device blue output, step (1) to (4), to give a blue luminance compensation coefficient of each pixel; red after performing luminance correction, luminance correction green and blue luminance correction, step (5); the luminance supplementary step (5) comprises: performing the following operations for each pixel: red luminance of each pixel is multiplied by the compensation coefficient obtained red luminance red luminance after the correction; green luminance of each pixel is multiplied by the green luminance compensation green luminance coefficients obtained after the correction; blue brightness of each pixel is multiplied by the compensation factor to obtain a blue luminance of the blue luminance after the correction.
3.根据权利要求1或2所述的校正方法,其特征在于,所述步骤(1)包括: 对每个传感器进行如下亮度校正:(31)控制显示装置输出;(32)通过光照度测量装置测出传感器探测范围内的测试点的光照度值E61,并同时记录传感器的输出频率F1;(33)改变显示装置的亮度输出,并重复执行步骤(31),直到达到预先设定的亮度校正测量次数N,则执行步骤(34);(34)根据N个光照度值个输出频率F1,通过最小二乘法拟合得到Ea = IcF1+:^ 中的系数k和系数f。 The calibration method of claim 1 or claim 2, wherein said step (1) comprising: a luminance correction for each sensor as follows: (31) the control means outputs a display; (32) by the light measuring means measured illuminance value E61 test points within the sensor detection range, and simultaneously recording the output frequency F1 of the sensor; (33) to change the brightness of the display output device, and repeating steps (31), until a brightness correction preset measurement the number N, the step (34); (34) based on the N light luminance value output frequencies F1, by a least square method Ea = IcF1 +: coefficient k and the coefficient of f ^. ;所述步骤(2)包括:对每个传感器的输出值作以下修正得到亮度值f: f = kFi+f。 ; Said step (2) comprises: f = kFi + f: f obtained luminance value for each sensor output value of the following amendments. .
4.根据权利要求1或2所述的校正方法,其特征在于,所述步骤(3)包括:以显示装置左下角端点为原点做出具有χ轴和y轴的笛卡尔坐标轴,对于每一个没有设置传感器且不与任意一个传感器处于同行或同列的第一像素点a,且所述第一类像素点a不超出传感器探测范围,执行以下插值操作:每一个第一类像素点a的坐标为(xa,ya),在点a左方及上方且与点a距离最近的传感器al的坐标为(xla,yla),根据步骤(2)得到的亮度值为fla ;在点a右方及上方且与点a距离最近的传感器a2的坐标为(x2a,yla),根据步骤(2)得到的亮度值为f2a ;在点a 左方及下方且与点a距离最近的传感器a3的坐标为(xla,y2a),根据步骤(2)得到的亮度值为f3a;在点a右方及下方且与点a距离最近的传感器a4的坐标为(x2a,y2a),根据步骤(2)得到的亮度值为f4a ; 具体步骤如下:(41)在每一个第一类 The calibration method of claim 1 or claim 2, wherein said step (3) comprises: lower left corner of the display terminal device having made the Cartesian axes χ and y-axes is the origin, for each a sensor not provided with any sensor is not peers or the same column of a first pixel, and a pixel of the first type without departing from the scope of the sensor detection, perform the following interpolation operations: each of the first class of a pixel coordinates (xa, ya), at a point above and to the left, and a coordinate point closest to the sensor al (xla, yla), according to step (2) of the luminance values ​​obtained FLA; rightward at a point and above and with a point nearest to the sensor coordinate a2 (x2a, yla), according to step (2) of the luminance values ​​obtained F2a; coordinates of a point to the left and below the sensor and the nearest point of a distance a3 obtained according to step (2) at a point below and to the right, and a point closest to the sensor coordinate a4 (x2a, y2a),; is (xla, y2a), according to step (2) of the luminance values ​​obtained f3a F4a luminance value; the following steps: (41) each of the first class 素点a的χ轴方向进行插值计算,根据以下公式得到每一个第一类像素点a的正上方点的亮度值f(a〃 ): χ-axis direction is a pixel point interpolation calculation to obtain the luminance value f (a〃) immediately above each of the first class of points of a pixel according to the following formula:
Figure CN102025952AC00031
每一个第一类像素点a的正下方点的亮度值f(a '): A first luminance value f for each category immediately below the point of a pixel (a '):
Figure CN102025952AC00032
(42)根据f(a"“)和f(a '),在每一个第一类像素点a的y轴方向进行插值计算,根据以下公式得到每一个第一类像素点a的亮度值f(a): /(«) = ^^ · /(«") + ^^ ./(«)。 (42) The f (a "") and f (a '), interpolate each of the first type a y-axis direction of pixels, each of the first class to obtain a pixel luminance value f according to the following formula (a): / ( «) = ^^ · / (« ") + ^^ ./ («).
Figure CN102025952AC00033
5.根据权利要求ι或2所述的校正方法,其特征在于,所述步骤⑶包括:以显示装置左下角端点为原点做出具有χ轴和y轴笛卡尔坐标轴,对于每一个没有设置传感器但与任意一个传感器处于同一列的第二类像素点b,且所述第二类像素点b不超出传感器探测范围,执行以下操作:每一个第二类像素点b的坐标为(xb,yb),在点b上方且与点b距离最近的传感器bl 的坐标为(xlb,ylb),根据步骤(2)得到的亮度值为flb;在点b下方且与点b距离最近的传感器b2的坐标为(xlb,y2b),根据步骤(2)得到的亮度值为f2b ;对每一个第二类像素点b的y轴方向进行插值计算,根据以下公式得到每一个第二类像素点b的亮度值f (b) Ι correction method according to claim 2 or claim, wherein said step ⑶ comprising: a lower left corner of the display terminal device having made the origin χ and y axes of the Cartesian axes, is not provided for each but any of the sensor a second sensor is in the same column type b pixels, and the second type pixel b does not exceed the range of the sensor detection, perform the following operations: each of the second type b is a pixel coordinate (XB, yb), above the point b and the coordinate point of the nearest sensor bl b is (xlb, ylb), obtained according to step (2) FLB luminance values; b2 below the point b and point b and the nearest sensor the coordinates (xlb, y2b), according to step (2) of the luminance values ​​obtained F2b; for each of the second type b y-axis direction pixel interpolation calculation is performed to obtain each second type pixel b by the following formula the luminance value f (b)
Figure CN102025952AC00034
6.根据权利要求1或2所述的校正方法,其特征在于,所述步骤(3)包括:以显示装置左下角端点为原点做出具有χ轴和y轴笛卡尔坐标轴,对于每一个没有设置传感器但与任意一个传感器处于同一行的第三类像素点c,且所述第三类像素点c不超出传感器探测范围,执行以下操作:每一个第三类像素点c的坐标为(χ。,yc),在点c左方且与点c距离最近的传感器cl 的坐标为(Xl。,ylc),根据步骤(2)得到的亮度值为fle ;在点c右方且与点c距离最近的传感器c2的坐标为(Xl。,y2c),根据步骤(2)得到的亮度值为f2。 The correction method of claim 1 or claim 2, wherein said step (3) comprises: lower left corner of the display terminal device having made the origin χ and y axes of the Cartesian axes, for each but the sensor is not provided in any of a third type of sensor pixels c in the same row, and the third type pixel c does not exceed the range of the sensor detection, perform the following operations: each of the pixel coordinates of a third type of c ( . χ, yc), and at point c and c from the left point coordinates of the nearest sensor cl (Xl, ylc), according to step (2) of the luminance values ​​obtained fle;. right at point c and point nearest sensor coordinate c is c2 (Xl., y2c), according to step (2) to give the luminance value f2. ;对每一个第三类像素点c的χ轴方向进行插值计算,根据以下公式得到每一个第三类像素点c的亮度值f(c) ; Third category for each χ c-axis direction pixel interpolation calculation is performed to obtain the luminance value of each of the third class F (c) pixel according to the following formula c
Figure CN102025952AC00035
7.根据权利要求1所述的校正方法,其特征在于,所述步骤(3)包括: 对于每一个超出传感器探测范围的第四类像素点d,执行以下操作: 寻找与每一个第四类像素点d距离最近的第一传感器、第二传感器和第三传感器; 第一传感器与第四类像素点d的距离为L1,第二传感器与第四类像素点d的距离为L2,第三传感器与第四类像素点d的距离为L3,第一传感器根据步骤(2)得到的亮度值为Yl,第二传感器根据步骤(2)得到的亮度值为Y2,第三传感器根据步骤(2)得到的亮度值为Y3,^L = U+L2+U ■·如果L1 > L2 > L3,则每一个第四类像素点d的亮度值Y为: The correction method according to claim 1, wherein said step (3) comprises: for each sensor exceeds the detection range of the fourth pixel type d, do the following: Find each of the fourth class d from the nearest pixel a first sensor, second sensor and third sensor; a first distance sensor and the fourth type of pixel d is L1, the distance of the second sensor and the fourth pixel type d is L2, the third the distance sensor and the fourth type of pixel d is L3, a first sensor according to step (2) to obtain the luminance values ​​Yl, a second sensor in accordance with step (2) to give the luminance value Y2, the third sensor in accordance with step (2 ) obtained brightness value Y3, ^ L = U + L2 + U ■ · If L1> L2> L3, the fourth class of each pixel luminance value Y d is:
Figure CN102025952AC00041
如果L1 = L2,且Y1>Y2,则每一个第四类像素点d的亮度值Y为 If L1 = L2, and Y1> Y2, the luminance value of each pixel of the fourth class of Y is d
Figure CN102025952AC00042
如果L1 = L2,且Υ1<Υ2,则每一个第四类像素点d的亮度值Y为L/ If L1 = L2, and Υ1 <Υ2, the fourth class of each pixel luminance value Y d is L /
Figure CN102025952AC00043
如果L2 = L3,且Y2>Y3,则每一个第四类像素点d的亮度值Y为 If L2 = L3, and Y2> Y3, a fourth class of each of the luminance value Y of the pixel is d
Figure CN102025952AC00044
如果L2 = L3,且Υ2<Υ3,则每一个第四类像素点d的亮度值Y为 If L2 = L3, and Υ2 <Υ3, the fourth class of each pixel luminance value Y d is
Figure CN102025952AC00045
8.根据权利要求1所述的校正方法,其特征在于,所述步骤(4)包括: 将显示装置划分为M个区域,以中央处理器及其所处理的传感器作为一个区域,对每个区域进行局部亮度补偿系数计算,所述区域为矩形,每个中央处理器所处理的最上方亮度传感器所探测到的行位置为每个区域的顶端横向边界线,每个中央处理器所处理的最下方亮度传感器所探测到的行位置为每个区域的底端横向边界线,每个中央处理器所处理的最左方亮度传感器所探测到的列位置为每个区域的左端纵向边界线,每个中央处理器所处理的最右方亮度传感器所探测到的列位置为每个区域的右端纵向边界线;对于显示装置的第一行中央处理器,其区域顶端横向边界线扩展为显示装置像素点的第一行;对于显示装置的最后一行的中央处理器,其区域底端横向边界线扩展为显示装置像素点 The correction method according to claim 1, wherein said step (4) comprising: a display device is divided into M areas, the central processor and processed as a sensor area, for each local area luminance compensation coefficient calculation, the area is rectangular, each of the luminance sensor top central processor processed the detected position to the top row of the lateral boundary of each region, each central processor processed lowermost luminance sensor to detect the position of the bottom end of each row region lateral boundary lines, the left-most luminance sensor each central processor processed the detected position of the left end column of each longitudinal boundary region, brightness sensor rightmost each central processor processed the detected position of the right end column of each longitudinal boundary region; central processor unit for the first row of the display area which is extended to the top lateral boundary display device the first row of pixels; last line of the central processor of the display device, which area extended to the bottom lateral boundary pixel display device 的最后一行;对于显示装置的第一列中央处理器,其区域左端纵向边界线扩展为显示装置像素点的第一列;对于显示装置的最后一列中央处理器,其区域右端纵向边界线扩展为显示装置像素点的最后一列;具体亮度补偿系数计算方法如下:ι)计算每个区域中像素点的亮度平均值Ei,以及整个显示装置所有像素点的亮度平均值C;2)查找每个区域中的亮度最小值;3)将每个区域的亮度平均值Ci与整个屏的亮度平均值2;做比较,计算区域亮度补偿系数g:a)如果E >1令每个像素点亮度补偿系数 Last line; row for displaying a first central processor unit, which boundary line extended longitudinal region of the left column of the first pixel of the display device; Show last for a central processor unit, which boundary region of the longitudinal extension of the right Finally, a pixel display device; specific luminance compensation coefficient is calculated as follows: ι) is calculated for each area pixel of the luminance average value of the average luminance of all pixels C Ei, and the entire display means; 2) for each region to find the minimum luminance; 3) the average luminance average luminance of each region and the entire screen Ci 2; compare the calculated area luminance compensation coefficient g: a) if E> 1 so that the luminance of each pixel compensation coefficients
Figure CN102025952AC00051
表示i区域中所有像素点的'—, 1^self亮度最小值,Lsdf表示i区域中每个像素点自身的亮度值;b)如果比较i区域中每个像素点的亮度值L1与丨区域中的亮度平均值ζ若5 1 yLi < Ij-^g=1'反之,若L,々I;'令厂会。 I represents the zone 'of all pixels -, 1 ^ self luminance minimum, Lsdf i represents each pixel area the luminance value itself; b) if the luminance value L1 and Shu area of ​​each pixel region of the comparative i If the average value of the luminance ζ 5 1 yLi <Ij- ^ g = 1 'the other hand, if L, 々I;' plant will make.
9. 一种显示装置亮度校正系统,其特征在于,所述系统包括: 在显示装置上设有多个成行列排布的中央处理器,每个中央处理器处理一个或多个亮度传感器,所述系统还包括依次连接的亮度校正模块、亮度获取模块、亮度插值模块和亮度补偿模块:亮度校正模块用于对多于一个亮度传感器进行亮度校正;亮度获取模块在显示装置正常运行中,获取根据亮度传感器经过亮度校正后的亮度值作为亮度传感器所对应像素点的亮度值;亮度插值模块根据亮度获取模块获取的亮度值对没有设置亮度传感器的像素点进行亮度采集插值获得对应像素点的亮度值;亮度补偿模块根据亮度获取模块和亮度插值模块获取的亮度值对每个像素点进行亮度补偿系数计算,并根据亮度补偿系数对每个像素点进行亮度补偿。 A luminance correction system display apparatus, wherein, said system comprising: a plurality arranged in a matrix on a display device of the central processor, each central processor or a plurality of brightness sensors, the said system further comprising a luminance correction module connected sequentially, the luminance obtaining module, brightness and brightness compensating module interpolation module: a luminance correction means for more than one brightness sensor for brightness correction; luminance obtaining module in normal operation of the display device, obtained according to brightness sensor after the luminance value after luminance correction luminance values ​​of pixels as the luminance sensor corresponds; luminance interpolation module luminance acquisition interpolated to obtain a corresponding pixel luminance value not set a brightness sensor pixel luminance obtaining the luminance value obtaining module according to the ; luminance compensation module acquires the luminance value of a luminance block and the luminance obtained by luminance interpolation module compensation coefficients calculated for each pixel, and the brightness compensation for each pixel based on the luminance compensation coefficient.
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