TW201229997A - Color correction system of a color sequential display and the method thereof - Google Patents

Abstract

A color correction system of a color sequential display and the method thereof are provided. The mixed-light luminance value of the first color field, the second color field, and the third color field detected by a light sensor can be calculated by an arithmetic unit via the designed matrix to obtain RGB pure light luminance value, so as to facilitate the following color correction and white balance compensation, thereby achieving to alleviate color breakup and to keep the function of color correction and compensation in the meanwhile.

Description

201229997 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a color correction method, and more particularly to a color correction method for use in a color sequential display. [Prior Art] In the past liquid crystal displays, a color filter was required to be placed above the element to filter the light source to display the color to be displayed, and the human eye received the light source.

The red, green, and blue light displayed after passing through the color filter can be mixed to sense the color of the element. However, the color filter affects the overall light transmittance of the liquid helium display. In addition, the color filter also affects the dot size of the single pixel of the liquid crystal display, resulting in liquid crystal display. The resolution is limited by the color filter. In order to improve the above-mentioned problems such as resolution and light transmittance, a color Sequential liquid crystal display has been developed. The color-sequence liquid crystal display is unsatisfactory, and the three primary color components of a single element are sequentially displayed to present an excellent shirt. Each pixel of the color sequential liquid crystal display emits red, green and blue light as backlights by three illumination sources. In a frame time, the pixel can recognize the color of the element according to the display data corresponding to the visual persistence of the red, green and blue human eyes. Therefore, the color sequential method, the crystal display does not need to set the color center m and since the size of each color element of the color sequential liquid crystal display device is smaller than the liquid crystal display with the color filter (four), the color sequential liquid crystal display It can reduce costs and can provide resolution. In order to achieve the purpose of white balance compensation and color correction, the color calibration commonly used in the color sequence liquid 201229997 crystal display · · Timing control number im ^ Figure 1, the package 2 〇 3 shirt controller 1, the light dipole The body driver r曰, the diode 2〇4, the gate controller 1〇5, the source controller 106, ': and two: 〇7, and the sensor 1〇8. The sensor 108 is coupled to the middle, and the 〇1' color controller (10) is embedded in the timing controller 101, and the timing controller 1G1, the LED driver 103 to the timing controller 101, and the plurality of light-emitting diode systems face two-pole driver 1〇3 'gate controller (10) and the source controller are connected to the timing controller 1G1 to control the operation of the liquid crystal panel iG7, ' The arithmetic unit or the color controller (10) may also be disposed outside the timing controller 101 and transferred to the timing controller 101, without being limited to the timing controller 101. The driving method of the pixel is the color of the timing controller (8) outputting the voltage to the gate controller 105 and the source controller=6' to control the pixel voltage in the liquid crystal panel 1〇7, respectively. The controller 102 provides the brightness value corrected by the LED driver 103 according to the inquiry table (1〇〇kup tab(4), thereby driving the LED 204 to display an appropriate color and white balance, wherein the lookup table can be stored. The timing controller 1 () 1 or the color controller 1G2 +. The sensor (10) may include a color (four) detector, a temperature detector, and a photodetector, according to different types of sensors 108, the color correction system The operation principle includes the following three types: The first system uses a color sensor to measure the intensity of red, green, and blue light emitted by the rgb light-emitting diode, and then transmits it to the timing controller (TCON). The color controller controls the load or current of the above-mentioned light-emitting diode by the LED driver and the compensation mechanism, and then displays the required brightness to achieve the color correction. The second method uses a temperature sensor (temperature se delete (10) to measure the temperature change of the light-emitting diode, and feedback the detection result to the color controller according to the temperature and the red, green and blue light-emitting diodes. The look-up table adjusts the above-mentioned illuminating, the load or current of the polar body' to achieve the purpose of color correction. The first method uses a light sensor (light sens〇r) to obtain red, green, and respectively in a time-sharing manner. The brightness value of the blue light emitting diode is sent back to the color controller, and the brightness of the above-mentioned light-emitting diode is attenuated through the look-up table. If the brightness is found to be attenuated, the The light-emitting diode compensates for its brightness 'by adjusting to the desired white balance' to achieve the purpose of color correction. Since the color sequential liquid crystal display uses three sub-surfaces of continuous color fields to shoot into the human eye, The color image is synthesized in the brain, so if there is a relative speed between the human images (for example, when the display is still moving, the eye is moving) or when the display moves, the human eye is still motionless ^K The sub-picture will not be completely effective in the view class, and the phenomenon of misalignment at the edge of the shirt image will be lost through the visual persistence ==; the clear image cannot be observed, which seriously affects the display's shell. This phenomenon is also called color. Separation (colorbreakup) phenomenon. With the breakthrough and advancement of technology (4), it is expected that there are many solutions. The most common is to insert sub-color fields of other colors in each color of the color-sequence liquid crystal display, using color superposition. The principle is that the color difference of the edge of 201229997 is 昱&. The difference between the and the beba is reduced, thereby suppressing the human eye's sense of color separation. For example: RGBW color sequential method, RGBCY color sequential method, *face biliary, GwBw color order method, RwGwBwGw Color sequence method and so on. ^ While the above method can effectively suppress the generation of color separation, but each color field will insert a sub-color field of other colors instead of a single color. Therefore, if using the light sensor detection, only The color of the mixed color is not the monochromatic light, so the color correction and compensation cannot be performed. In the technique related to the color sequential display, there are still some technical difficulties to be overcome in order to simultaneously suppress the color correction and compensation of the color knife. SUMMARY OF THE INVENTION In order to overcome the above difficulties and disadvantages, the present invention provides a color correction method, particularly a color correction method and system for suppressing color separation. The purpose of the hair on the moon is to convert the color luminosity detected by the light sensor into red, 绛, 夕 A pure A and & 、, also a pure color first 俾, 俾 色彩 的 盘 盘 it Another object of the present invention is to provide a color sequential display which can simultaneously suppress the color separation phenomenon f and maintain a normal color correction and compensation function. It should be noted that the above color sequential method may include, but not limited to, RGBW color sequential method, RGBCY color sequential method, WmaxRGB, Rw (} wBw color sequential method, color sequential method. ~ In order to achieve the above objectives, the present invention provides A method for correcting the color shirt of a color sequential display comprises the steps of: measuring a first color 201229997 field by a light sensor: f brightness values of the two color fields and the third color field (Rw, Gw, Bw); The operation result of the above-mentioned photo sensor is calculated by using the operation-single 7L to obtain the luminance values (R, G, B) of the solid colors of red, green, and blue; the red color is performed by a color controller. Correcting the brightness values of the solid colors of green, blue, and blue; and transmitting the brightness values of the red, green, and blue solid colors corrected by the color controller to a light-emitting diode driver; wherein, the first color The brightness value of the field is defined as Rw=R+xG+iB, and the brightness value of the second color field is determined as |GW=mR+G+jB, and the brightness value of the third color field is defined as B^nR+yG+B, Where 0 is J, i, j, m, n < i, and the above operation unit is operated by the following matrix: ( , -1 r R, 1 X i rK, G m 1 X Gw , 5 > B... ny 1 , y \ nr / 知月 Further provides a color sequential display, the correction system 'includes: a light sensor for detecting the first color corpse, ^ The brightness values of the two-color field and the third color field (Rw, 〜, Bw); - the second step is to the above-mentioned photo sensor; an arithmetic unit is located at the upper: time control for the above-mentioned light sensing The detection result of the device is obtained to obtain the luminance values of the red, green, and blue solid colors (R, G, ^, 益, electrically coupled to the above timing controller and the above operation: control for the above red, green, blue The solid color brightness value is corrected; ^ = the diode driver 'electrically lightly matches the above-mentioned timing controller, and the red, green, and blue solid color brightness values after the second positive: 1 towel and the brightness of the color field The value is defined as Rw=R+xG+lB, p color^th<coin color field bright 201229997 degree value is defined as Gw=mR+G+jB, and the brightness value of the above third color field is defined as WR yG+B ' Where 0 points, y, i, j, m, η < 1, and the above-mentioned first generation is A ... _____ ^ Λ , -I > 1 r R, 1 · χ i G = m 1 j X Gfy Ft _ By the above technical means, the mixed color light: the degree value detected by the light sensor can be converted into the true solid color light brightness value of the red, green and blue light emitting diodes, thereby Subsequent color corrections and compensations are effectively performed to show the appropriate color and white balance. The above description is used to clarify the purpose of the present invention, the technology and/or the advantages achieved. The present invention will be apparent from the following description of the preferred embodiments and the accompanying drawings and claims. The present invention will be described in terms of the preferred embodiments and the accompanying drawings, which are intended to illustrate and not to limit the scope of the invention. Therefore, the present invention may be widely practiced in other embodiments in addition to the preferred embodiments in the specification. Ben Maoming uses an arithmetic unit to convert the brightness of the mixed color light detected by the light sensing into a solid color of red, green and blue according to the relationship between the brightness of the light-emitting diode and the (four) relationship of the current and through the matrix operation. Brightness, in order to facilitate the correction and compensation of the color of the look-up table. The color correction system disclosed in the present invention is introduced, and reference can be made to 201229997, which is a preferred embodiment of the color-sequence method using the color correction system of the present invention. a timing controller 1 〇1, a color controller 102, a light-emitting diode driver 1〇3, a plurality of light-emitting diodes W4, a gate controller 1〇5, a source controller 1〇6, a liquid crystal panel

107, an arithmetic unit 2〇1, and a photo sensor. The arithmetic unit can be embedded in the color controller 1G2, and the color controller 1〇2 is engaged. In the timing controller 101. In some embodiments, the arithmetic unit 201 and the color controller 1G2 may also be placed outside the timing controller 1G1, and the three are separated from each other and electrically coupled. The photo sensor 2〇2, the LED driver 103, the switch & to the timing controller 101, the gate controller 105 and the source control unit 106 are also divided into the timing controller 1()1 to Controls the operation of the pixel in the liquid crystal panel 1〇7. The plurality of light emitting diodes 1 4 are coupled to the light emitting: polar body driver 103' to provide the desired color. The photo sensor 2〇2 is coupled to the timing controller, and 10 can detect the brightness values of the plurality of color fields by means of time-sharing detection, and only needs three color fields to calculate the pure color light. After the brightness value of the at least three color fields is obtained, the photo sensor 202 can transmit the measured color brightness value to the color controller ι〇2, and the unit 201 can be used by the color. The controller 102 obtains the detection result and operates the operation to obtain the brightness value of the solid color light. The color controller 1〇2 can be connected to: the brightness value of the pure color light calculated by the operation unit 201, and check the above solid color light according to the query~ Whether the brightness value is normal or attenuated, and then the result is compensated by the 2 degree value. Among them, the lookup table can be stored in the color controller (10): the second sequence controller 101. In addition, the 'liquid crystal pixel driving mode is the time controller 1 〇1 separately outputs the voltage to the gate controller 1〇5 and the source control '9 201229997 106, and then controls the pixel voltage in the liquid crystal panel 1〇7, which is known to those skilled in the art, so it will not be described. .

The color sequential method applied by the present invention may include RGB W color sequential method, RGBCY color sequential method, WmaxRGB, RwGwBw color sequential method, RwGwBwGw color sequential method, etc. However, each color field of the above color sequential method is not a separate solid color. Light, but mixed with some other colors of mixed color, that is, assuming that the first color field detected by the light sensing 202 is mainly red light, the detected brightness is RW=R+ Gr+Br 'where the ruler is the desired red solid color brightness, and Gr and Br are the brightness of the green light-emitting diode and the blue light-emitting diode respectively in this color place; if the second color field is mainly green Light, the brightness is w Rg+G+Bg 'where g is the desired green solid color brightness, and ~ and Bg are displayed as red light emitting diode and blue light emitting diode in this color place. Brightness; #third color field is mainly blue light, shell, ^ its brightness is w Rb Gb+B, where b is the desired blue solid color brightness, and the heart and Gb knife are red light emitting diode and green The light-emitting diode appeals to the displayed brightness in this color field. It should be noted that the order of the first color field, the second color field, and the third color field is only an embodiment for the purpose of illustration and not limitation. In order to obtain the brightness of the pure color light (R, g, b in the above mathematical formula), the present invention can be operated by the operation unit 2〇1 according to the relationship between the brightness and the fish current of the light-emitting diode, and reference can be made to FIG. 3, It is a graph of the relationship between the brightness and current of the light-emitting diode. It can be clearly seen from the figure that the brightness and current curves of the light-emitting diode can be roughly divided into a linear region and a saturated region. For the convenience of the system, it is usually operated in a linear manner. In other words, the brightness of the display is linear with the application of 201229997 = flow ratio. Therefore, 'b^^ is a linear relationship, so it can be defined as Rg=mR, Rb=nR, because Rg and & only mixed in the second color field and part of the red color of the third color field, Less than R, so m, η should be less than i; similarly, 〇, Gr, and G; can be defined as Gr=xG, Gb=yG, and because only, the first color field and the third color Part of the green brightness value of the field, it must be: G, so x, y should be less than 1, similarly, Br and Bg can be defined in MB, Bg = jB, because & and Bg only in the first - The color is a part of the color field. The blue brightness value 'must be less than Β, so i," should be less than 1 after the above algebraic conversion, the first color field brightness value can be defined ^ R = R + xG + iB, the second color field The brightness value is Gw=mR+G+jB, and the third color% has a shell value of Bw=nR+yG+B. According to the above mathematical formula, the arithmetic unit 201 can perform operations based on the following matrix:

f 1 , 1 xi (R, Gw = mi JXG nyi J 'R, ( \ 1 xi -1 X, G = w 1 j X Gw ny 1 \ ) (丨1) (eg ~x)(々-,) 1) (1ι·) (/mW), (wy~rt) h) ο一·) \ %, X / , Bw / 1 + myi + nxj - ηϊ - mx - yj ^ j yi — γπλ j where m , n, x, y, i, j are set by using v _ the user to eliminate the color knife off phenomenon 'so the value of i4 is a known number. And, Gw and Bw are known from the way of 201229997 light sensing If 2 0 2 hour _ so that 'R, G, B values can be obtained by these known numbers and the above number f, thereby obtaining red and green , blue pure color brightness value, with == pure and compensation. It should be noted that if you use a light-emitting diode friend; = (-), use the 杳 table...丨I: Polar body specification brightness value. (4) Relationship '(4) In order to obtain a solid color light, reference may be made to FIG. 4, which is an embodiment of the first and second three color fields of the present invention, and the brightness R of the red light emitting diode (1) is observed to be the highest. The display brightness in the second color field 3〇2 is 〇J, and the display brightness in the second color field 303 is 〇2R, that is, the display brightness g of the green light-emitting diode in the second color field 302 is the highest. The brightness of the first color field 3〇1 is 〇.1G', and the brightness of the third color field 3〇3 is also •1=, that is, x=0_l, y=0.1; the blue light emitting diode is in the third color. In the field, the brightness B is the highest. The display brightness of the first color field is ,.1B, that is, i=〇2, j=〇丨. If the brightness R is 80 nits and the brightness G is 2 〇〇 特 'Brightness B is 2 〇 nit, then the first color field brightness measured by the light sensor can be estimated as RW= 80+0.1G+0.2B = 80+20+4=1〇4 ' The brightness of the second color field should be Gw=0.3R+200+0.1B=226, and the brightness of the third color field should be

Bw=0.2R+0.1B+20=56, the above values are brought into the above matrix for operation as follows: ί S] 12 201229997 104' 226 , 56 ) ’1 0.1 0_2, 0.3 1 0.10.2 0.1 1

(R G B

(R G B 1 0.1 0.2 0.3 1 〇_ι 0-2 0.1 1 f ’104' 226 56

(RGB 1 + 0.006 + 0.002 - 0.04 - 0.03 -0.01 (1-0.01) (0.02-0.1) (0.01-0.2) (0.02-0.3) (1-0.04) (0.06-0.1) (0.03-0.2) (0.02 -0.1) (1-0.03) '104) X 226 ) ,56 ^ 0.928 (0.99) (-0.08) (-0.19)' (-0.28) (0.96) (-0.04) (-0.17) (-0.08) ( 0.97) 102.96 — 18.08 — 10.64 '104, X 226 , 56 , 0.928

-29.12 + 216.96-2.24 -17.68-18..08 + 54.32 \ 1 [74.24) [80 ) 1 --X 0.928 185.6 200 ) [18.56 J The result obtained by the above matrix is R=8〇, G = 2〇 〇, B = , fish == values are exactly equal' and thus prove that the present invention can be obtained correctly. Please refer to FIG. 5, which illustrates the implementation process of the present invention. Second: The: First, at step 4〇1, by After the user starts, shows and, after: in step 402 0, the sequence control 'Si:? is turned on, if it is determined to be turned on, then the step IS is entered, and the method of measuring the sense of time is required to be measured first. The color is mixed with the 3 color field (Rw, G ::: ::π controller or color_confirmation detection == ", then return to step - into step 405 _, using the monthly right Into, the entry step is converted to red 1 = different ^ according to the above matrix, the mixed color brightness value, the table, the blue solid color brightness value (R, G, B), and then, enter r S] 13 201229997 step injury The color controller is used to correct the brightness value of the solid color light described above. Specifically, the color control (4) can determine whether the solid color party value is attenuated or abnormal according to the lookup table, and The luminance value of the attenuation or the different f is performed. In the step, the corrected solid color party value is transmitted to the LED driver by the timing controller to drive the complex LED to display the corrected Color to achieve white balance compensation and color correction

The above description is a preferred embodiment of the invention. Those skilled in the art should be able to appreciate the invention and the patent rights (4) which are used to illustrate the invention and not to limit the invention. The scope of patent protection shall depend on the equivalent field of the patent. Those who are familiar with the field, in the absence of profit:: God or the scope of the 'changes or run-ups, are the equivalent changes or designs completed under the 4th of this issue, and should be included in the following Within the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 depicts a conventional color correction system. Figure 2 depicts an embodiment of a color correction system of the present invention. Figure 3 shows the relationship between brightness and current of a light-emitting diode. Figure 4 depicts an embodiment of the second and third color fields of the present invention. Figure 5 depicts a flow chart of the present invention. [Main component symbol description] 1 〇1 timing controller 102 color controller i〇3 light-emitting diode driver 201229997 104 light-emitting diode 105 gate controller 106 source controller 10 7 liquid crystal panel 108 sensor 201 operation Unit 202 light sensor 301 first color field 302 second color field 303 third color field 401-407 steps

Claims (1)

201229997 VII. Patent application scope: 1. The color correction method of the color-sequence display, the steps of which include: measuring a first-color field, a second color field and _ third by means of a light-sensing (four) time-sharing debt The brightness value of the color field (rw, Gw, Bw); using a different single 70 to calculate the brightness of the light sensor (four), in order to illuminate the red, green, and blue solid color brightness values (R, G , B); correcting the brightness values of the red, green, and blue solid colors by a color controller; and • transmitting the red, green, and blue solid color brightness values corrected by the color controller to A light-emitting diode driver. The color correction method of the color sequential display according to claim 1, wherein the brightness value of the first color field is defined as Rw=R+xG+iB, and the brightness value of the second color% is defined as Gw= mR+G+jB, the brightness value of the third color field is defined as Bw=nR+yG+B, where 〇, y, 込j, m, n<i, and the operation unit is performed in the following matrix Operation: , . , 1 X i (p \ Kw G = W 1 y X Gw J) ny 1 , / 3.= The color correction method of the color sequential display according to claim 1, further including a timing control The device receives the detection result of the photo sensor and transmits the result to the operation unit for calculation. [S] 16 201229997 4. The color correction method of the color sequential display according to claim 3, wherein the color controller is configured to correct the red, green and blue color light by the timing controller The brightness value is transmitted to the light emitting diode driver. The color correction method of the color sequential display of the present invention further includes driving the plurality of light emitting diodes according to the corrected solid color values of the red, green, and blue colors by the LED driver. 6. The color correction method of the color sequential display according to the claim ,, wherein the color controller determines the red, green, and/or according to a query 〇η, 刈 up up table The blue brightness value of the blue color is the bamboo shoot, and the value of ^ is not reduced, and the sub-light compensates for the attenuation of the solid color brightness value. The color correction system of the color sequence display comprises: a light sensor for detecting the redundancy value of the first color field and the first color field of the second color field in time division ( Rw, Gw, Bw:); two-time ί2, electrically coupled to the photosensor; an arithmetic unit located in the timing controller, the detection result of the field ride, (4) to Light sensing brightness value (R, G, B" ', and blue solid color light-color controller, electrical matching to the operation list - red, green, 誃 绌 止 止 e e e e e e e The 丄h degree value is corrected, and the I-light one-pole driver is electrically coupled to receive the corrected red, green, and blue solid colors=the controller is used for the t-bar nine degree of exemption value. 17 201229997 8 The color correction system of the color sequential display according to Item 7, wherein the party value of the first color % is defined as Rw=R+xG+iB, and the brightness value of the second color field is defined as Gw. =mR+G+jB, the brightness value of the third color field is Bw=nR+yG+B ' where 〇$x, y, i, j, m, n< 1, and the arithmetic unit is With the following moment The operation is performed: r \ 1 u -! r R, 1 χ ι X, G w 1 j X Gw ny 1 j 9. The color correction system of the color sequential display as described in claim 7 further includes 3 complex illumination The diode is coupled to the LED driver for the brightness of the solid color of the red, green, and blue colors of the 抆海抆. 1〇·, π ^ Item 7 The color correction system of the color sequential display display, wherein the color control system determines whether the solid color light intensity value of the evening dish is attenuated according to the _ lookup table (iGQk up _e) And for the attenuation, the color luminance value is compensated. [ 18