CN101909215A - Color conversion method and corresponding color display method thereof - Google Patents
Color conversion method and corresponding color display method thereof Download PDFInfo
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- CN101909215A CN101909215A CN2009101469129A CN200910146912A CN101909215A CN 101909215 A CN101909215 A CN 101909215A CN 2009101469129 A CN2009101469129 A CN 2009101469129A CN 200910146912 A CN200910146912 A CN 200910146912A CN 101909215 A CN101909215 A CN 101909215A
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Abstract
The invention discloses a color conversion method. The method comprises the following steps: firstly, receiving a color signal; secondly, calculating saturation to acquire a saturation value of the color signal, and calculating hue angle weight to acquire a first hue angle weight value of the color signal corresponding to a first search table and a second hue angle weight value of the color signal corresponding to a second search table; and thirdly, performing operations on colors, converting the color signal to a first color output signal according to the saturation value and the first hue angle weight angle, and converting the color signal to a second color output signal according to the saturation value and the second hue angle weight angle.
Description
Technical field
The invention relates to a kind of color conversion method with and corresponding color display packing, refer to especially a kind of color conversion method with and corresponding color display packing, be used to have the display unit of two backlights, to promote the scope of colour gamut.
Background technology
General traditional monitor adopts red, green in single pixel and blue three primary colors blend the color that institute's desire shows, and then by the image of being desired to demonstrate in conjunction with the pixel of a plurality of different colors.Because the shown color of single pixel is blended by the predetermined three primary colors of display, in the trichromatic colour gamut (color gamut) that makes shown color be restricted to be adopted, cause display can't correctly demonstrate the color of image.
The method of known lifting gamut range is broadly divided into two kinds, is respectively a spacing color mixed method and a time color mixing method, mainly all is to utilize the quantity that increases the colour mixture color, reaches many primary colors colour mixture, and then promotes colour gamut.Please refer to Fig. 1, Fig. 1 is the schematic diagram of known spacing color mixed method.As shown in Figure 1, known spacing color mixed method is except providing a red colored filter R, a green tint colo(u)r filter G and a blue color colo(u)r filter B in single pixel cell 10, other increases a yellow color filter Y, a carmetta (magenta) colored filter M and a cyan (cyan) colored filter C, therefore single pixel cell can have six primary colors and carries out color mixture, and then promotes the gamut range that color shows.
In addition, known time color mixing method is to utilize tricolor signal the signal from GTG conversion of signals to XYZ color space of a color transition matrix with input earlier.Then, again via the computing of the algorithm of primary colors more than conversion of signals to four primary signal C1, C2, C3 and C4 with the XYZ color space.At last, chrominance signal C1 and C2 are projected via one first projection arrangement in regular turn, chrominance signal C3 and C4 then project via one second projection arrangement in regular turn, but mixed color signal C1, C2, C3 and C4 by this, and promote the colour gamut of display color.
Yet from the above, known spacing color mixed method needs to increase the colored filter of different colours in single pixel, so that need the extra processing procedure of cost to make the colored filter of the different colours of desire increase, has therefore increased the processing procedure cost.In addition, known time color mixing method need utilize the color conversion matrix signal from the GTG conversion of signals to the XYZ color space with tricolor signal earlier, therefore need expend a plurality of multipliers and adder, so that increase the complexity and the component count of circuit, thereby be unfavorable for the realization of circuit.So, promote the scope of colour gamut and simplify the target that the complexity reality of circuit arrangement and processing procedure is demanded urgently making great efforts for industry simultaneously.
Summary of the invention
One of main purpose of the present invention be to provide a kind of color conversion method with and corresponding color display packing, to promote the scope of colour gamut.
In order to achieve the above object, the present invention discloses a kind of color conversion method.At first, receive color signal of the same colour.Then, carry out a saturation calculation step, utilize a saturation arithmetic unit to calculate an intensity value of chrominance signal, and carry out a hue angle weight calculation step, calculate chrominance signal corresponding to one first hue angle weighted value of one first look-up table and chrominance signal one second hue angle weighted value corresponding to a second look-up table.Then, carry out a color calculation step, according to the intensity value and the first hue angle weighted value, utilize a color arithmetic unit that chrominance signal is converted to one first color output signal, and, chrominance signal is converted to one second color output signal according to the intensity value and the second hue angle weighted value.
In order to achieve the above object, the present invention discloses a kind of color display packing.At first, according to color conversion method of the present invention, utilize an arithmetic unit that chrominance signal is converted to this first color output signal and this second color output signal.Then, export the first color output signal and second color in regular turn and output signal to a display unit, wherein display unit comprises one first backlight and one second backlight.Then, show the first color output signal, and light first backlight simultaneously.At last, show the second color output signal, and light second backlight simultaneously.
In sum, color conversion method of the present invention mainly calculates the intensity value and the two hue angle weighted values of chrominance signal earlier, again by computing corresponding to the color calculation step of two backlights, to obtain two different color output signals, and the bright backlight of match wheel flow point, demonstrating more abundant colors, and promote the colour gamut that color shows.
Description of drawings
Fig. 1 is the schematic diagram of known spacing color mixed method.
Fig. 2 shows system schematic for colour display screen of the same colour of the present invention.
Fig. 3 shows method flow diagram for colour display screen of the same colour of the present invention.
Fig. 4 is the distribution schematic diagram of first backlight of the present invention and second backlight.
Fig. 5 is the CIE 1931 xy chromaticity coordinates figure of first colour gamut of the present invention and second colour gamut.
Fig. 6 is the block schematic diagram of the arithmetic unit of first embodiment of the invention.
Fig. 7 is the color conversion method flow chart of first embodiment of the invention.
Fig. 8 is the flow chart of hue angle weight calculation step of the present invention.
Fig. 9 is the tabulation of hue angle operational formula of the present invention.
Figure 10 is the hue angle schematic diagram of the end points of the end points of first colour gamut of first embodiment of the invention and second colour gamut.
Figure 11 is first look-up table of first embodiment of the invention.
Figure 12 is the second look-up table of first embodiment of the invention.
Figure 13 is the block schematic diagram of the arithmetic unit of second embodiment of the invention.
Figure 14 is the color conversion method flow chart of second embodiment of the invention.
Embodiment
Please refer to Fig. 2 and Fig. 3, Fig. 2 shows system schematic for colour display screen of the same colour of the present invention, and Fig. 3 shows method flow diagram for colour display screen of the same colour of the present invention.As shown in Figure 2, Color display system 100 of the present invention is to comprise an image input unit 102, an arithmetic unit 104 and a display unit 106, and wherein display unit 106 is to comprise a plurality of pixel cells (figure does not show), one first backlight 108 and one second backlight 110.As shown in Figure 3, color display packing of the present invention comprises the following step:
Step S100: utilize image input unit 102 that color signal 112 of the same colour is inputed in the arithmetic unit 104;
Step S200: then,, utilize arithmetic unit 104 that chrominance signal 112 is converted to one first color output signal 114 and one second color output signal 116 according to a color conversion method;
Step S300: then, export the first color output signal 114 and the second color output signal 116 in regular turn to display unit 106;
Step S400: then, the first color output signal 114 is inputed to a pixel cell, demonstrating the first color output signal 114, and light first backlight 108 simultaneously; And
Step S500: then, again the second color output signal 116 is inputed to same pixel cell, showing the second color output signal 116, and close first backlight 108 simultaneously, and light second backlight 110.
In addition, please refer to Fig. 4, Fig. 4 is the distribution schematic diagram of first backlight of the present invention and second backlight.As shown in Figure 4, first backlight 108 is to comprise a plurality of first luminescence unit 118 and a plurality of second luminescence units 120 with one second colour gamut with one first colour gamut, wherein be positioned at first luminescence unit 118 of same row and second luminescence unit 120 and be for being staggered, and be positioned at first luminescence unit 118 of delegation and second luminescence unit 120 also for being staggered.Each first luminescence unit 118 of the present invention is to comprise one first color LEDs 122, one second color LEDs 124 and one the 3rd color LEDs 126, and each second luminescence unit 120 is to comprise one the 4th color LEDs 128, one the 5th color LEDs 130 and one the 6th color LEDs 132, but luminescence unit of the present invention is not limited to be made of light-emitting diode, also can be made of other luminescence component.Present embodiment is to comprise one first red light emitting diodes 122, one first green LED 124 and one first blue LED 126 with first luminescence unit 118, and second luminescence unit 120 comprises one second red light emitting diodes 128, one second green LED 130 and one second blue LED 134 and is example, but is not limited thereto.And the wavelength that first red light emitting diodes 122 of present embodiment and second red light emitting diodes 128 are produced is all 620.59 rice how; The wavelength of first green LED 124 is 531 rice how, and 130 wavelength of second green LED are 506 rice how; The wavelength of first blue LED 126 is 459 rice how, and the wavelength of second blue LED 132 is 466 rice how.But the wavelength of first light-emitting diode of the present invention and second light-emitting diode is not defined as above-mentioned wavelength, and the present invention also can change first light-emitting diode and second light-emitting diode with different wave length according to actual demand.In addition, 10 * 18 matrixes that first backlight 108 of present embodiment and second backlight 110 are made up of first luminescence unit 118 and second luminescence unit 120 are constituted, but the present invention is not limited to this, and the matrix size that can actual demand decides first luminescence unit 118 and second luminescence unit 120 to be formed.
Please refer to Fig. 5, and please in the lump with reference to figure 4.Fig. 5 is the CIE 1931 xy chromaticity coordinates figure (chromaticity diagram) of first colour gamut of the present invention and second colour gamut.As shown in Figure 5, the wavelength of the wavelength of the wavelength of first red light emitting diodes 122, first green LED 124 and first blue LED 126 is to constitute first colour gamut 134, and the wavelength of second red light emitting diodes 128, the wavelength of second green LED 130 and the wavelength of second blue LED 132 are to constitute one second colour gamut 136.It should be noted that the color that first backlight 108 is produced is to be limited in first colour gamut 134, and the color that second backlight 110 is produced is to be limited in second colour gamut 136.In addition, the present invention utilizes to light first backlight 108 in turn and mix first colour gamut 134 and second colour gamut 136 with second backlight 110, and then by the notion of time colour mixture constitute one greater than first colour gamut 134 and second colour gamut 136 blend together colour gamut 138, to promote the colour gamut that color shows.
Below will more clearly demonstrate color conversion method of the present invention, and demonstrate with bright first backlight of match wheel flow point and second backlight and be positioned at the color that blendes together colour gamut.Please refer to Fig. 6 and Fig. 7, Fig. 6 is the block schematic diagram of the arithmetic unit of first embodiment of the invention, and Fig. 7 is the color conversion method flow chart of first embodiment of the invention.As shown in Figure 6, arithmetic unit 104 is to comprise a saturation arithmetic unit 140, a hue angle arithmetic unit 142 and a color arithmetic unit 144.Wherein, saturation arithmetic unit 140, hue angle arithmetic unit 142 and color arithmetic unit 144 are made of at least one adder, at least one subtracter, at least one multiplier or at least one divider, to be used for that the chrominance signal of being imported 112 is done computings such as addition, subtraction, multiplication or division.As shown in Figure 7, the color conversion method of present embodiment is to comprise the following step:
Step S220: receive color signal 112 of the same colour;
Step S230: carry out a saturation calculation step, utilize a saturation arithmetic unit 140 to obtain an intensity value of chrominance signal 112, and carry out a hue angle weight calculation step, obtain chrominance signal 112 corresponding to one first hue angle weighted value of one first look-up table and chrominance signal 112 one second hue angle weighted value corresponding to a second look-up table; And
Step S240: carry out a color calculation step, according to the intensity value and the first hue angle weighted value, utilize color arithmetic unit 142 that chrominance signal 112 is converted to one first color output signal 114, and, chrominance signal 112 is converted to one second color output signal 116 according to the intensity value and the second hue angle weighted value.
In step S220, the chrominance signal 112 that present embodiment received is to comprise one first primary colors GTG value 146, one second primary colors GTG value 148 and a tricolor gray-scale value 150, and the first primary colors GTG value 146, the second primary colors GTG value 148 and the tricolor gray-scale value 150 of present embodiment are to be example with red GTG value 146, green GTG value 148 and blue GTG value 150 respectively, but are not limited to this.The first primary colors GTG value, the second primary colors GTG value and tricolor gray-scale value also can be respectively other color, and for example: the first primary colors GTG value, the second primary colors GTG value and tricolor gray-scale value are respectively yellow, carmetta and cyan.
In step S230, the saturation calculation step is according to a saturation operational formula w=1-(min/max), and utilize the saturation arithmetic unit to calculate the intensity value of chrominance signal 112, wherein w is an intensity value, min is a numerical value of getting the reckling in red GTG value 146, green GTG value 148 and the blue GTG value 150, and max is a numerical value of getting the maximum in red GTG value 146, green GTG value 148 and the blue GTG value 150.For example: when the combination of red GTG value 146, green GTG value 148 and blue GTG value 150 of input is (255 in regular turn, 0,0) time, maximum is red GTG value 146, its numerical value is 255, and minimum value is green GTG value 148 or blue GTG value 150, and its numerical value is 0, and therefore can calculate intensity value w is 1; When the combination of red GTG value 146, green GTG value 148 and blue GTG value 150 of input is (255 in regular turn, 253,200) time, maximum is red GTG value 146, its numerical value is 255, and minimum value is blue GTG value 150, and its numerical value is 200, and therefore can calculate intensity value w is 0.2157.Saturation operational formula of the present invention is not limited to above-mentioned formula, can adjust according to actual demand.
In addition, please refer to Fig. 8, Fig. 8 is the flow chart of hue angle weight calculation step of the present invention.As shown in Figure 8, the hue angle weight calculation step in the step 230 comprises the following step:
Step S232: carry out a hue angle calculation step, utilize hue angle arithmetic unit 142 to calculate the hue angle (Hue) that the first primary colors GTG value 146, the second primary colors GTG value 148 and tricolor gray-scale value 150 are constituted; And
Step S234: carry out tabling look-up step, from one first look-up table (LUT), search the corresponding one first hue angle weighted value of hue angle, and from a second look-up table, search the corresponding one second hue angle weighted value of hue angle.
Please refer to Fig. 9, Fig. 9 is the tabulation of hue angle operational formula of the present invention.Shown in the hue angle H (* 60) of Fig. 9, in step S232, the hue angle of present embodiment is to do computing according to the definition in HSV space, but is not limited thereto, and also can utilize different color spaces to do computing.The hue angle calculation step is to judge the magnitude relationship of red GTG value 146, green GTG value 148 and blue GTG value 150 earlier, to divide into a maximum, a median and a minimum value.Then, carry out computing according to hue angle formula H=θ+60 * ((median-minimum value)/(maximum-minimum value)), wherein H is a hue angle, under the situation of red GTG value 146 〉=green GTG value 148 〉=blue GTG value 150, θ is 0 degree, under the situation of green GTG value 148＞red GTG value 146 〉=blue GTG value 150, θ is 60 degree, under the situation of green GTG value 148 〉=blue GTG value 150＞red GTG value 146, θ is 120 degree, under the situation of blue GTG value 150＞green GTG value 148＞red GTG value 146, θ is 180 degree, and under the situation of blue GTG value 150＞red GTG value 146 〉=green GTG value 148, θ is 240 degree, when red GTG value 146 〉=blue GTG value 150＞green GTG value 148, then θ is 300 degree.Hue angle formula of the present invention is not limited to above-mentioned formula, also can utilize other hue angle formula to calculate the hue angle of color according to the notion that color in the HSV space and hue angle have a corresponding relation.
In addition, shown in the field of the hue angle H (* 64) of Fig. 9, the utilization of circuit unit for convenience, the calculating ratio of hue angle can further be converted to 64 with 60, the hue angle formula then can be exchanged into H=θ+64 * ((median-minimum value)/(maximum-minimum value)) and carries out computing, and with θ be 60 the degree, 120 the degree, 180 the degree, 240 the degree with 300 the degree situations change respectively 64 the degree, 128 the degree, 192 the degree, 256 the degree with 320 the degree, can further do computing to help circuit unit with binary system.
In addition, in step 234, first look-up table and second look-up table are to calculate according to second colour gamut of first colour gamut of first backlight and second backlight to get.Please refer to Figure 10 to Figure 12, Figure 10 is the hue angle schematic diagram of the end points of the end points of first colour gamut of first embodiment of the invention and second colour gamut, and Figure 11 is first look-up table of first embodiment of the invention, and Figure 12 is the second look-up table of first embodiment of the invention.As shown in figure 10, end points R1, the G1 of first colour gamut of present embodiment, the hue angle of B1 are respectively 0,120 and 240, and the hue angle of end points R2, the G2 of second colour gamut, B2 is respectively 0,130 and 210.As Figure 11 and shown in Figure 12, in order to utilize color in first colour gamut 134 and the color in second colour gamut 136 to be mixed into the color that blendes together in the colour gamut 138, first look-up table 164 of present embodiment can calculate according to the hue angle of first colour gamut 134 and second colour gamut 136 with second look-up table 166, and first look-up table 164 is relations of representing the first hue angle weighted value and hue angle, and second look-up table 166 is relations of representing the second hue angle weighted value and hue angle.But first look-up table 164 of the present invention is not limited to Figure 11 and Figure 12 with second look-up table 166.
Please continue with reference to figure 6 and Fig. 7.In step 240, the color calculation step is according to one first color operational formula RGB
1=RGB-w * k
1* RGB and one second color operational formula RGB
2=RGB-w * k
2* RGB carries out computing, wherein RGB
1Be the first color output signal 114, RGB
2Be the second color output signal 116, RGB is a chrominance signal 112, and w is an intensity value, k
1Be the first hue angle weighted value, and k
2It is the second hue angle weighted value.In addition, in step 240, the red GTG value 146 of chrominance signal 112, green GTG value 148 are one first red output GTG value 152, one first green output GTG the value 154 and one first blue output GTG values 156 that are converted to the first color output signal 114 by the first color operational formula respectively with blue GTG value 150, and are converted to one second red output GTG value 158, one second green output GTG value 160 and one second blue output GTG value 162 of the second color output signal 116 respectively by the second color operational formula.
From the above, present embodiment is by intensity value that calculates chrominance signal and two hue angle weighted values, again chrominance signal is converted to two color output signals corresponding to two backlights, the bright backlight of match wheel flow point to be promoting the colour gamut that color shows by this, and then demonstrates more abundant colors.Compared to known with the signal of GTG conversion of signals to the XYZ color space, the present invention only can reach the effect of many primary colors by saturation arithmetic unit, hue angle arithmetic unit and color arithmetic unit and two backlights of arranging in pairs or groups, and then can avoid because of carrying out the spent extra arithmetic unit of matrix operation.In addition, the present invention also only needs three colored filters are set in single pixel, can avoid increasing complexity and the ancillary cost of making colored filter.It should be noted that the present invention is not limited to only utilize two backlights, and be not limited to only calculate two color output signals, and also can utilize a plurality of backlights, and cooperate and to calculate a plurality of color output signals, to provide color abundanter image.
In addition, color conversion method of the present invention is not limited to the foregoing description, and color conversion method of the present invention also can comprise a Gamma correction step, a counter-rotating Gamma correction step or a color space conversion step.Please refer to Figure 13 and Figure 14, Figure 13 is the block schematic diagram of the arithmetic unit of second embodiment of the invention, and Figure 14 is the color conversion method flow chart of second embodiment of the invention.For the difference of clear relatively present embodiment and the foregoing description, the assembly identical with first embodiment is to use identical label.As shown in figure 13, compared to the arithmetic unit of first embodiment, the arithmetic unit 200 of present embodiment comprises a gamma voltage conversion apparatus 202, counter-rotating gamma voltage conversion apparatus 204, one first color space translation operation device 206 and one second a color space translation operation device 208 in addition.As shown in figure 14, the color conversion method of present embodiment is to comprise the following step:
Step S220: receive color signal 112 of the same colour;
Step S230: carry out a saturation calculation step, utilize a saturation arithmetic unit 142 to obtain an intensity value of chrominance signal 112, and carry out a hue angle weight calculation step, obtain chrominance signal 112 corresponding to one first hue angle weighted value of one first look-up table and chrominance signal 112 one second hue angle weighted value corresponding to a second look-up table;
Step S250: carry out a Gamma correction step, utilize gamma voltage conversion apparatus 202 that the GTG value of chrominance signal 112 is converted to brightness value;
Step S260: carry out a color space conversion step, utilize the first color space arithmetic unit 206 that chrominance signal 112 is converted to one first color space signal 208, and utilize the second color space arithmetic unit 210 that chrominance signal 112 is converted to one second color space signal 212;
Step S240: carry out a color calculation step, according to the intensity value and the first hue angle weighted value, utilize color arithmetic unit 144 that first color space signal 208 is converted to one first color output signal 114, and, second color space signal 212 is converted to one second color output signal 116 according to the intensity value and the second hue angle weighted value; And
Step S270: carry out counter-rotating gamma (De-Gamma) aligning step, utilize counter-rotating gamma voltage conversion apparatus 204 that the brightness value of the first color output signal 114 and the second color output signal 116 is converted to the GTG value.
In step S250, the Gamma correction step of present embodiment is to be used to avoid chrominance signal through the color of feeling with human eye after the computing notable difference to be arranged, and do not meet the sensation that human eye changes image, therefore elder generation is converted to first primary color luminance values, second primary color luminance values and three primary colors brightness value respectively with the first primary colors GTG value, the second primary colors GTG value and the tricolor gray-scale value of input chrominance signal 112, having more correct colour mixture, and help the follow-up color computing of carrying out.In addition, in step S260, the color space switch process of present embodiment is to go out one first look torque battle array M1 and one second look torque battle array M2 according to first backlight and second backlight design earlier, utilize the first color space arithmetic unit 206 with first primary color luminance values then, second primary color luminance values and three primary colors brightness value are multiplied by the first look torque battle array M1, to obtain one first color space brightness value, one second color space brightness value and one the 3rd color space brightness value, be first color space signal 208, and utilize the second color space arithmetic unit 210 with first primary color luminance values, second primary color luminance values and three primary colors brightness value are multiplied by the second look torque battle array M2, to obtain one the 4th color space brightness value, one multicolored color spatial brightness value and one the 6th color space brightness value, be second color space signal 212, by this can be with first primary color luminance values, second primary color luminance values and three primary colors brightness value are converted to the color space of first backlight and the color space of second backlight, and then cause color error ratio when avoiding the follow-up demonstration first color output signal 114 and the second color output signal 116.In present embodiment, M1 can be
M2 can be
But the present invention is not limited to this, also can do corresponding adjustment or design according to first colour gamut of being desired and second colour gamut.Then, compared to first embodiment, the step S240 of present embodiment carries out the first color operational formula RGB with the first color space brightness value, the second color space brightness value and the 3rd color space brightness value
1=RGB-w * k
1The computing of * RGB, and the 4th color space brightness value, multicolored color spatial brightness value and the 6th color space brightness value carried out the second color operational formula RGB
2=RGB-w * k
2The computing of * RGB is with the first color output signal 114 and the second color output signal 116 that obtains representing with brightness value.At last, in step S270, counter-rotating Gamma correction step is with being that the first color output signal 114 and the second color output signal 116 of brightness value is converted to the GTG value again via the Gamma correction step conversion originally, to help the demonstration of display unit.
In sum, color conversion method of the present invention mainly calculates the intensity value and the two hue angle weighted values of chrominance signal earlier, again by computing corresponding to the color calculation step of two backlights, to obtain two different color output signals, and the bright backlight of match wheel flow point, demonstrating more abundant colors, and promote the colour gamut that color shows.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (11)
1. color conversion method, it includes:
Receive color signal of the same colour;
Carry out a saturation calculation step, utilize a saturation arithmetic unit to obtain an intensity value of this chrominance signal, and carry out a hue angle weight calculation step, obtain this chrominance signal corresponding to one first hue angle weighted value of one first look-up table and this chrominance signal one second hue angle weighted value corresponding to a second look-up table; And
Carry out a color calculation step, according to this intensity value and this first hue angle weighted value, utilize a color arithmetic unit that this chrominance signal is converted to one first color output signal, and, this chrominance signal is converted to one second color output signal according to this intensity value and this second hue angle weighted value.
2. color conversion method as claimed in claim 1 is characterized in that, this chrominance signal comprises one first primary colors GTG value, one second primary colors GTG value and a tricolor gray-scale value.
3. color conversion method as claimed in claim 2, it is characterized in that, this saturation calculation step is to carry out computing according to a saturation operational formula w=1-min/max, wherein w is this intensity value, min is a numerical value of getting the middle reckling of this first primary colors GTG value, this second primary colors GTG value and this tricolor gray-scale value, and max is a numerical value of getting the maximum among this first primary colors GTG value, this second primary colors GTG value and this tricolor gray-scale value.
4. color conversion method as claimed in claim 2 is characterized in that, this hue angle weight calculation step comprises:
Carry out a hue angle calculation step, utilize a hue angle arithmetic unit to calculate the hue angle that this first primary colors GTG value, this second primary colors GTG value and this tricolor gray-scale value are constituted; And
Carry out tabling look-up step, from one first look-up table, search the corresponding one first hue angle weighted value of this hue angle, and from a second look-up table, search the corresponding one second hue angle weighted value of this hue angle.
5. color conversion method as claimed in claim 4 is characterized in that, this hue angle calculation step comprises:
Judge the magnitude relationship of this first primary colors GTG value, this second primary colors GTG value and this tricolor gray-scale value, to obtain a maximum, a median and a minimum value; And
Carry out computing according to hue angle formula H=θ+60 * ((this median-this minimum value)/(this maximum-this minimum value)), wherein H is this hue angle, when this maximum is a red GTG value, this median is a green GTG value, and this maximum is during more than or equal to this median, θ is 0 degree, when this maximum is this green GTG value, and this median is when being this redness GTG value, and θ is 60 degree, when this maximum is this green GTG value, this median is a blue GTG value, and this maximum is during more than or equal to this median, and then θ is 120 degree, when this maximum is this blueness GTG value, and when this median was this green GTG value, θ was 180 degree, when this maximum is this blueness GTG value, and when this median is this redness GTG value, θ is 240 degree, and when this maximum is this redness GTG value, this median is this blueness GTG value, and this maximum is during more than or equal to this median, and then θ is 300 degree.
6. color conversion method as claimed in claim 4 is characterized in that, this first look-up table and this second look-up table are to calculate according to one second colour gamut of one first colour gamut of one first backlight and one second backlight to get.
7. color conversion method as claimed in claim 4, it is characterized in that, this first backlight is made of a plurality of first luminescence units with this first colour gamut, and this second backlight is made of a plurality of second luminescence units with this second colour gamut.
8. color conversion method as claimed in claim 7, it is characterized in that, be positioned at these first luminescence units of same row and these second luminescence units for being staggered, and be positioned at these first luminescence units of delegation and these second luminescence units for being staggered.
9. color conversion method as claimed in claim 1 is characterized in that, this color calculation step is according to one first color operational formula RGB
1=RGB-w * k
1* RGB and one second color operational formula RGB
2=RGB-w * k
2* RGB carries out computing, wherein RGB
1Be this first color output signal, RGB
2Be this second color output signal, RGB is this chrominance signal, and w is this intensity value, k
1Be this first hue angle weighted value, and k
2Be this second hue angle weighted value.
10. color conversion method as claimed in claim 1, it is characterized in that, also be contained in the step that this chrominance signal is provided and carry out between this color calculation step, carry out a Gamma correction step, the GTG value of this chrominance signal is converted to brightness value, and after this color calculation step, carry out a counter-rotating Gamma correction step, the brightness value of this first color output signal and this second color output signal is converted to the GTG value.
11. a color display packing, it comprises:
Receive color signal of the same colour;
Carry out a saturation calculation step, utilize a saturation arithmetic unit to obtain an intensity value of this chrominance signal, and carry out a hue angle weight calculation step, obtain this chrominance signal corresponding to one first hue angle weighted value of one first look-up table and this chrominance signal one second hue angle weighted value corresponding to a second look-up table; And
Carry out a color calculation step, according to this intensity value and this first hue angle weighted value, utilize a color arithmetic unit that this chrominance signal is converted to one first color output signal, and, this chrominance signal is converted to one second color output signal according to this intensity value and this second hue angle weighted value;
Export this first color output signal in regular turn and this second color outputs signal to a display unit, wherein this display unit comprises one first backlight and one second backlight;
Show this first color output signal, and light this first backlight simultaneously; And
Show this second color output signal, and light this second backlight simultaneously.
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| CN2009101469129A CN101909215B (en) | 2009-06-05 | 2009-06-05 | Color conversion method and corresponding color display method thereof |
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