CN102065311B - Color management circuit and related color management method - Google Patents
Color management circuit and related color management method Download PDFInfo
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Abstract
The embodiment of the invention provides a color management circuit and a related color management method. The color management circuit is arranged in a display, and a panel of the display is provided with a panel conversion characteristic. The color management circuit comprises a first nonlinear conversion circuit, a color matrix conversion circuit and a second nonlinear conversion circuit, wherein the first nonlinear conversion circuit is used for performing first nonlinear conversion on nonlinear color data to generate first linear conversion data; the color matrix conversion circuit is used for performing linear matrix conversion on the first conversion data to generate matrix conversion data; and the second nonlinear conversion circuit is used for performing second nonlinear conversion on the matrix conversion data to generate second conversion data and transmitting the second conversion data to the panel. The second nonlinear conversion characteristic is combined with an overall conversion characteristic of the panel conversion characteristic, and is substantially linear conversion.
Description
Technical field
The present invention relates to color management; The color correcting method and the related system that relate in particular to a kind of color management circuit and correlation technique and set this color management circuit; Come accurately to set the color management circuit through color correcting method and related system, can significantly promote the matching degree of display color space.
Background technology
In general; For letting display consistent display effect can be arranged to identical color; Therefore industry has successively been formulated multicolour space (color space) standard; With as the standard between image storage and display device, and having of being widely known by the people in these color spaces: standard RGB (standard RGB is sRGB) with color space such as Adobe RGB.
SRGB is usually used in fields such as display, printer and the Internet; When the color definition in the view data during in the sRGB color space, then the display effect that on the display that meets the sRGB color space fully, produced of this view data is with the deviation on the achromatization.Yet the colour gamut (color gamut) that display generally can show colour gamut common in most situation and the definition of sRGB color space can't be mated fully.Please refer to Fig. 1, it is on the CIE1931xy chromatic diagram, the relation of colour gamut that different display is supported and sRGB color space.As shown in the figure, the color that triangle K is surrounded is promptly corresponding to the defined colour gamut of sRGB color space, and the colour gamut that on behalf of different displays, triangular form L and the color that M is surrounded can support respectively.When the colour gamut of supporting when display can't fit like a glove with the defined colour gamut of sRGB color space, generally can utilize color management circuit or software, make display to show and approach defined all colors of sRGB color space.
Therefore; In the manufacturing of display; Must display be carried out colour correction with regard to different color spaces, generally speaking, mainly be to make display good display effect all to be arranged to different color spaces (as: sRGB and Adobe RGB) through the color management circuit of setting in the display.In known colour correction flow process; White, redness, green, blueness, cyan, carmetta and the yellow that at first can show maximum briliancy to display, the export ratio of adjusting RGB one-tenth score value in the display is so that this seven colors can be near the corresponding maximum briliancy color of color definition space.Yet; With regard to the sRGB color space is example; Said method is handled with non-linear color conversion characteristic to defined linearity in the sRGB color space and is carried out extra process, often causes color generation colour cast or the bad phenomenon of other correcting result beyond aforementioned seven maximum briliancy colors.
In addition; Known technology is quite complicated and loaded down with trivial details in producing the flow process of proofreading and correct display color on the line; Even need adjust with the manpower repeated measurement, so can't adjust to all displays on the product line one by one, so the several samples in common only measurement and the adjustment product line; And will be used in all displays on the product line from the parameter cover that these samples are obtained; But since every display this on making, the deviation (as: drift of parameter on the liquid crystal panel manufacture process) on the display characteristic is arranged all more or less, so said method and can't produce the parameter of suitable every display is so can't reach the colour correction result of the best.Can know that by above 2 known technology still has many parts of demanding urgently improveing.
Summary of the invention
In view of this; The present invention provides a kind of color management circuit; Its framework is different from known color management circuit; So can handle one by one, present defined each color of color space with loyalty, and then reduce known technology and only carry out the color offset phenomenon that colour correction caused to the color of maximum briliancy to defined color conversion characteristic in the color space.
Moreover; Through color management circuit provided by the present invention; Can further improve on the too high problem of complexity of producing the just single display of line colonel, therefore, the present invention also provide a kind of can be at the color correcting method that produces rapid adjustment display color on the line; Because color correcting method of the present invention has reduced required consumed time of correction single display device and cost, and then make that the flow process of calibration one by one all displays is achieved on the product line.
Therefore; The invention provides a notion that realizes color management functionality with hardware circuit; This circuit has comprised the first non-linear conversion circuit, color matrix conversions circuit and the second non-linear conversion circuit; Wherein, the first non-linear conversion circuit provides the non-linear conversion of the hue component value (as: rgb value) in the input signal, converts linear rgb value to the linear R GB value with input.In addition; The second non-linear conversion circuit is used for revising the nonlinear response (as: gamma value is 2.2 gamma transfer characteristic) of display itself; Therefore; Just can the gamma transfer characteristic of display be adjusted into linearity through the second non-linear conversion circuit, thus, just help to realize the color conversion of color space definition.Therefore; Through first and second above-mentioned non-linear conversion circuit; Revised existing non-linear color conversion relation in the whole flow for displaying up hill and dale, so only need afterwards realize that through the color matrix conversions circuit color conversion of color space definition gets final product (as: converting rgb value to corresponding XYZ values).Therefore, through suitably adjusting the parameter of each electronic circuit in the color management circuit, the just color of export target color space definition exactly is to reach the purpose of color management.
Therefore, according to one embodiment of the invention, it provides a kind of color management circuit.This color management circuit is arranged in the display, and a panel of this display has a panel transfer characteristic.This color management circuit includes: one first non-linear conversion circuit, a color matrixer and one second non-linear conversion circuit.This first non-linear conversion circuit is in order to carry out one first non-linear conversion to produce first translation data of a linearity to a nonlinear color data.This color matrix conversions circuit is coupled to this first non-linear conversion circuit, and in order to this first translation data is carried out linear matrix conversion to produce matrix conversion data.This second non-linear conversion circuit is coupled to this matrixer, and in order to these matrix conversion data are carried out one second non-linear conversion to produce one second translation data to this panel.Wherein, this second non-linear conversion characteristic combines a whole transfer characteristic of this panel transfer characteristic, is essentially a linear transformation.
In addition, another embodiment of the present invention also provides a kind of color management method, and it is applied in the display.This display possesses a plate, and this panel has a panel transfer characteristic.This color management method includes: a nonlinear color data is carried out one first non-linear conversion to produce first translation data of a linearity; This first translation data is carried out linear matrix conversion to produce matrix conversion data; And these matrix conversion data are carried out one second non-linear conversion to produce one second translation data to this panel.Wherein, this second non-linear conversion characteristic combines a whole transfer characteristic of this panel transfer characteristic, is essentially a linear transformation.
Description of drawings
Fig. 1 is the sketch map of the colour gamut and the relation between display color gamut of known sRGB color space.
Fig. 2 is the function block schematic diagram of an embodiment of color management circuit of the present invention.
Fig. 3 is the flow chart of an embodiment of color correcting method of the present invention.
Fig. 4 is the sketch map that concerns between the corresponding matrix with it of different circuit in the color management circuit shown in Figure 2.
Fig. 5 is the function block schematic diagram of an embodiment of color calibration system of the present invention.
[main element symbol description]
200,550 displays
210,520 color management circuit
212 first non-linear conversion circuit
214,522 color matrix conversions circuit
216,524 second non-linear conversion circuit
222,226,544 memory cell
230,510 panels
310～330 steps
500 color calibration systems
530 color analysis devices
540 colour correcting apparatus
542 processing units
546 signal generators
Embodiment
Following explanation will be an example with the sRGB color space; And it is desired to reach the target color space of match colors as display; Yet the selection of target color space is not color management circuit of the present invention and color calibration system and the restriction of correlation technique on using.Those skilled in the art should be behind the disclosed technology contents of this specification of intensive reading; Based on spirit of the present invention; Color management circuit of the present invention and color calibration system are extended to other color space, and the variation in this design also belongs to scope of the present invention.
The relation that following two formulas at first, are arranged between the CIE 1931XYZ chromatic stimulus value of the input rgb color composition value of definition display end and output in the sRGB color space:
Wherein, the C in the formula (1)
SrgbWith C
LinearRepresent R respectively
Srgb, G
SrgbWith B
SrgbAnd R
Linear, G
LinearWith B
LinearFormula (1) is represented the non-linear conversion of sRGB color space definition, with the non-linear C of input
SrgbThe hue component value converts linear C into
LinearThe hue component value.Formula (2) is then represented the color conversion of sRGB color space definition, and this is the mapping relations between hue component value and chromatic stimulus value XYZ.Color management circuit of the present invention can show the defined colour gamut of a target color space more accurately in order to make display; Thereby the nonlinear characteristic of display included in consider; Make and display and display effect after the color management circuit combines can equal defined all transformational relations in the target color space (formula (1) and formula (2)).
Then, please refer to Fig. 2, it is the function block schematic diagram of color management embodiment of circuit of the present invention.As shown in the figure, color management circuit 210 includes (but being not limited to) one first non-linear conversion circuit 212, a color matrixer 214 and one second non-linear conversion circuit.The first non-linear conversion circuit 212 is in order to receive a nonlinear color data (rgb value); Wherein this color data is imported by an external circuit (not shown); And owing to color management circuit 210 is arranged in the display 200, so this external circuit possibly be a video adapter (video adapter) or other exportable equipment (as: audio and video display device) that includes the vision signal of this color data.The first non-linear conversion circuit 212 can produce one first linear translation data nonlinear this color data is carried out particular conversion X according to defined non-linear conversion in the sRGB color space.Answering ben at this is in other embodiments of the invention, also can come suitably to adjust the running of particular conversion X according to the definition of other color space (as: Adobe RGB).
In the present embodiment; The first non-linear conversion circuit 212 includes one first memory cell 222; Its storage comparison list LUT1, wherein the first non-linear conversion circuit 212 carries out particular conversion X according to table of comparisons LUT1 and this color data, to export these hue component values.In other words, the first non-linear conversion circuit 212 carries out defined non-linear conversion in the sRGB color space with the mode of tabling look-up.Yet, if not via the mode of tabling look-up, but the functional relation of defined non-linear conversion in the sRGB color space is changed through computing circuit, also belong to scope of the present invention.
In the embodiments of the invention; Carry out extra adjustment to the mode of first memory cell, the 222 storage tables of comparisons especially again; It takies first memory cell, 222 too many memory spaces for avoiding the table of comparisons, and under the situation of the accuracy of excessive influence particular conversion X not, with suitable the giving up of partial content of desiring to be stored in the original table of comparisons in first memory cell 222; And produce adjustment back table of comparisons LUT1 being stored in first memory cell 222, and then compress the size of the original table of comparisons.The original table of comparisons is corresponding to the non-linear conversion that defines in the sRGB color space; And know like the people of technical field of the present invention; Near an exponential function, therefore in the high more part of table of comparisons input value, the difference between its corresponding output valve is also big more in the part of high order for this non-linear conversion; Therefore high order output valve does not influence the accuracy of particular conversion X than the accuracy of low level; So based on this observed result, the present invention when the original table of comparisons of storage, just give up high order output valve than the low level (content of for example more than one least significant bit (Least Significant Bit, LSB)); And when reading the output valve of the compression back table of comparisons, the content that will give up replaces with 0.For instance, if this color data represent by a predetermined figure, as: 12; Then in the original table of comparisons contrast each output valve also should be 12 long; Because do not influence the precision of non-linear conversion than the content of low portion in the high order output valve, therefore can set order when output valve and surpass 10 when long, two rejection of data of minimum; In other words; The output valve that is higher than 10 orders is all represented with 10 at last, to be stored in first memory cell 222 as the compression back table of comparisons.And when reading output valve, the data that are rejected only need zero padding to get final product, and in this example, and output valve multiply by 4 after being equivalent to order is higher than 10 compression.It should be noted; Foregoing is used as boundary only as the usefulness of example explanation with 10; Be not restriction of the present invention, in other words, the table of comparisons LUT1 that is stored in first memory cell 222 produce according to this color data an output valve with process as this first translation data in; If this color data is during less than a critical value (as: 10 maximums 1111111111 that can represent), then this first non-linear conversion circuit is directly exported the respective value that is found out among the table of comparisons LUT1; Yet, if this color data during greater than this critical value, is adjusted a prearranged multiple (as: multiply by 4) with the respective value that is found out among the table of comparisons LUT1, with as this first translation data.Because; The figure place of output valve possibly be less than or equal the figure place that this color data should be corresponding in the look-up table; Therefore needing according to circumstances, (as: whether this color data is greater than this critical value) could correctly produce this first translation data suitably to adjust this output valve.
Then, this first translation data can be input to carries out a linear particular conversion Y to produce matrix conversion data in the color matrix conversions circuit 214, and wherein, the operation and the setting means that are carried out about particular conversion Y will detail in the back.Then, the second non-linear conversion circuit 216 can carry out a particular conversion Z to these matrix conversion data, and then exports the panel 230 in one second translation data to the display 200, to show this second translation data through panel 230.
Moreover through particular conversion Z, a whole transfer characteristic system that makes that the transfer characteristic of transfer characteristic combining display panel 230 of this second non-linear conversion of the second non-linear conversion circuit 216 appeared is essentially a linear transformation.Specifically; This transfer characteristic of panel 230 is a gamma value greater than 1 gamma characteristic; Then can make both whole transfer characteristics of combining of the second non-linear conversion circuit 216 and panel 230 through particular conversion Z is the gamma characteristic that gamma value equals 1, or says, forms a linear transformation.In the present embodiment; The second non-linear conversion circuit 216 includes one second memory cell 226; Its storage comparison list LUT2; Wherein the second non-linear conversion circuit 216 carries out particular conversion Z according to table of comparisons LUT2 and these matrix conversion data, and exporting this second translation data, and the corresponding transfer characteristic of particular conversion Z decides according to the transfer characteristic of panel 230.
Therefore; By realizing being defined color conversion (shown in formula (2)) in the sRGB color space, then the transfer characteristic of the transfer characteristic of color matrix conversions circuit 214, the second non-linear conversion circuit 216 must equal defined color conversion matrix in the sRGB color space with the whole transfer characteristic of transfer characteristic after combining of panel 230.Yet; If target color space is Adobe RGB, then the transfer characteristic of the transfer characteristic of color matrix conversions circuit 214, the second non-linear conversion circuit 216 needs corresponding to defined color conversion among the Adobe RGB with the whole transfer characteristic of transfer characteristic after combining of panel 230.Moreover; For the transfer characteristic that can make color matrix conversions circuit 214, the transfer characteristic of the second non-linear conversion circuit 216 (are the matrix in the formula (2) with the whole transfer characteristic of transfer characteristic after combining of panel 230 corresponding to a defined color transition matrix in the sRGB color space; Below explanation is represented with color map matrix T M); Therefore the present invention at first obtain the second non-linear conversion circuit 216 and panel 230 through a colour correction method both combine the pairing equivalent matrix PM of linear transformation characteristic that then appeared, and utilize the relation between equivalent matrix PM and color map matrix T M to try to achieve the pairing color conversion matrix YM of particular conversion Y that color matrix conversions circuit 214 is carried out.Because final purpose is to make the relation that [YM] [PM]=[TM] arranged between the transfer characteristic integral body of different circuit and panel 230, so color conversion matrix YM can be by [YM]=[TM] [PM]
-1Matrix operation try to achieve; Wherein if utilize equivalent matrix PM and the defined color map matrix T of many group target color spaces M; Can be attained at the required color conversion matrix YM of coupling different target color space; And, suitably set color matrix conversions circuit 214 through color conversion matrix YM and can make display possess the ability of supporting a plurality of target color spaces simultaneously.Below will further specify the acquisition mode of equivalent matrix PM.
Please again with reference to figure 3, it is the flow chart of an embodiment of color correcting method of the present invention.For setting the parameter in the color matrix conversions circuit 214 in the above-mentioned color management circuit 210 smoothly, another embodiment of the present invention provides a kind of above-mentioned equivalent matrix PM and method of color conversion matrix YM of producing.Through equivalent matrix PM, can further try to achieve the matrix element among the color conversion matrix YM in the color matrix conversions circuit 214.This color correcting method is used for a display; And a panel of this display has a panel transfer characteristic; And this display includes a color management circuit and this panel, and wherein this color management circuit includes (but being not limited to): a color matrixer and one second non-linear conversion circuit.The running of this color correcting method can be summarized as follows briefly:
Step 310: set this second non-linear conversion circuit so that the transfer characteristic of this second non-linear conversion circuit combines a whole transfer characteristic of the transfer characteristic of this panel to equal a linear transformation in fact;
Step 320: do not using under this color matrix conversions circuit, importing color data, and making this panel show the pairing a plurality of color output valves of this color data through this second non-linear conversion circuit to this display; And
Step 330: the transfer characteristic of setting this color matrix conversions circuit according to these color output valves and this color data.
For color correcting method of the present invention is carried out smoothly, at first essential eliminate this panel to the hue component value in this color data (as; Rgb value) therefore nonlinear response, in step 310, is set this second non-linear conversion circuit and is made the transfer characteristic of this second non-linear conversion circuit combine a whole transfer characteristic of the transfer characteristic of this panel to equal a linear transformation in fact.Then; Color correcting method of the present invention further calculates this second non-linear conversion circuit and combines the pairing concrete functional relation of this linear transformation that this panel appeared; Therefore in step 320; Be convenient to not use under this color matrix conversions circuit, import this color data, and make this panel show the pairing a plurality of color output valves of this color data through this second non-linear conversion circuit to this display; Through measuring these color output valves, and then try to achieve the pairing concrete functional relation of this linear transformation.At length say; In an embodiment of the present invention; Can be through signal generator input this color data to this display so that this panel shows the pairing a plurality of color lumps of this color data; And briliancy and chromatic value through these specific color lumps of colourity instrumentation amount, and then produce a plurality of color output valves.Yet, in another embodiment, also can control this display through a firmware of building in the display, directly make this panel show these color lumps, obtain these color output valves through the colorimeter measurement again, more than two kinds of execution modes all belong to scope of the present invention.In addition, in the present embodiment, be that the briliancy that is measured and chromatic value are expressed as XYZ three chromatic stimulus values in CIE 1931 color spaces with as the color output valve.This color data that special attention should be that in the aforesaid operations to be imported is for linear.But in other embodiments; This color data of input also possibly under these situations, then need one first non-linear conversion circuit through being comprised in this color management circuit for non-linear; Should carry out a non-linear conversion by nonlinear color data, to produce first translation data of a linearity.Therefore; Will be in the step 320 in not using under this color matrix conversions circuit; First translation data of importing this linearity is to this display, and makes this panel show the pairing a plurality of color output valves of first translation data of this linearity through this second non-linear conversion circuit.
After learning these color output valves; Promptly can utilize between these color output valves and this color data first translation data of linearity (or should) relation and according to the defined color map matrix T of the target color space M of this display desire coupling of desire, further set the transfer characteristic of this color matrix conversions circuit.So, in step 330, just set the transfer characteristic of this color matrix conversions circuit according to these color output valves and this color data first translation data of linearity (or should).Specifically; In the step of the transfer characteristic of setting this color matrix conversions circuit according to these color output valves and this color data first translation data of linearity (or should); Wherein decide one first particular conversion (corresponding equivalent matrix PM) according to these color output valves and this color data first translation data of linearity (or should) further again; And change (corresponding color map matrix T M) according to the defined pre-color of target color space and decide one second particular conversion to set the transfer characteristic of this color matrix conversions circuit with this first particular conversion, wherein this second particular conversion is promptly corresponding to aforesaid color conversion matrix YM.Color conversion matrix YM and equivalent matrix PM can produce via the processing of building firmware in the outer computer hardware of display or the display; In brief; Color correcting method of the present invention do not limit produce color conversion matrix YM and equivalent matrix PM processing unit why, that is any hardware structure that can produce color conversion matrix YM and equivalent matrix PM all can be applicable among the present invention.In addition; After determining equivalent matrix PM through these color output valves and these this color datas; Then can produce a plurality of different color conversion matrix YM, make that the display after proofreading and correct can be supported a plurality of different target color spaces according to the corresponding color map matrix T M of different target color space.Be the corresponding relation between different circuit and matrix in clearer expression the present invention color management circuit shown in Figure 2, special relation between the two be drawn on Fig. 4.Because related content has been explained as above, so do not give unnecessary details in addition at this.
Based on above-mentioned color management circuit and color correcting method, another embodiment of the present invention provides a kind of color calibration system.Please refer to Fig. 5, it is the function block schematic diagram of an embodiment of color calibration system of the present invention.Color calibration system 500 includes (but a being not limited to) color analytical equipment 530 and a colour correction device 540, and is used for display 550, and color analysis device 530 is coupled to colour correcting apparatus 540 and display 550.Display 550 includes a panel 510 and a color management circuit 520, and wherein color management circuit 520 is coupled to panel 510.Moreover color management circuit 520 includes one first non-linear conversion circuit 522, a color matrixer 524 and one second non-linear conversion circuit 526.Color analysis device 530 is used for measuring the color output valve of this display floater 510; In one embodiment; Color analysis device 530 is a color analyzer, and measures the color output valve, and these are that the color output valve is pairing X in CIE 1931 color spaces, Y and Z chromatic stimulus value.
In one embodiment; Colour correcting apparatus 540 includes processing unit 542, memory cell 544 and signal generator 546; Wherein signal generator 546 includes signal to the display 550 of this color data in order to generation, so that display 550 shows corresponding color lump.544 storages of memory cell are corresponding to a plurality of color map matrix T M of different target color space, and in order to store these color output valves.Moreover; Processing unit 542 at first produces an equivalent matrix PM according to first translation data and these color output valves of this linearity, and utilizes equivalent matrix PM and color map matrix T M to produce in order to set the color conversion matrix YM of color matrix conversions circuit 524.Through the color map matrix T M of many groups of corresponding different target color spaces, can make display 550 support the colour gamut of these color spaces in proofreading and correct the back.Yet; In another embodiment; Processing unit 542 possibly be arranged in the display 550 with memory cell 544; Colour correcting apparatus 540 is stored in the memory cell 544 in the display 550 with these color output valves, and memory cell 544 is also stored a plurality of color map matrix T M corresponding to the different target color space.Therefore; The user only needs when using; Select the color space of display 550 desires operation through OSD (on-screen display); Processing unit 542 is selected corresponding color map matrix T M from memory cell 544 again, and produces equivalent matrix PM, and then obtains color conversion matrix YM and set color matrix conversions circuit 522.Therefore, through Color Management Mechanism provided by the present invention, the user can switch on two or more color spaces with display immediately.
In addition, be the basis with above-mentioned color management circuit, another embodiment of the present invention provides a kind of color management method, and it is to be applied in the display.This display possesses a plate, and this panel has a panel transfer characteristic.This color management method includes: color data are carried out one first non-linear conversion to produce one first translation data; This first translation data is carried out linear matrix conversion to produce matrix conversion data; And these matrix conversion data are carried out one second non-linear conversion to produce one second translation data to this panel; Wherein, this second non-linear conversion characteristic combines a whole transfer characteristic of this panel transfer characteristic, is essentially a linear transformation.Because the operating principle of each step has been explained in the description of above color management circuit in this color correcting method, grips for the letter of asking specification, seldom gives unnecessary details at this.
In summary; But because the technical bottleneck that display is made; Can't produce the display that meets a certain specific color space fully; Therefore color management circuit provided by the invention and color correcting method and related system can accurately be proofreaied and correct with a display, have especially more improved the color accuracy with the bigger wide color gamut display of general color space difference.
The above is merely the preferred embodiments of the present invention, and all equalizations of doing according to claims of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (18)
1. a color management circuit is arranged in the display, and a panel of this display has a panel transfer characteristic, and this color management circuit includes:
One first non-linear conversion circuit is in order to carry out one first non-linear conversion to produce first translation data of a linearity to a nonlinear color data;
One color matrixer is coupled to this first non-linear conversion circuit, in order to this first translation data is carried out linear matrix conversion to produce matrix conversion data; And
One second non-linear conversion circuit is coupled to this matrixer, in order to these matrix conversion data are carried out one second non-linear conversion to produce one second translation data to this panel;
Wherein, this second non-linear conversion characteristic combines a whole transfer characteristic of this panel transfer characteristic, is essentially a linear transformation.
2. color management circuit as claimed in claim 1, wherein this first non-linear conversion circuit is realized through a look-up table.
3. color management circuit as claimed in claim 2, wherein this color data is represented by a pre-determined bit number, and this look-up table is according to being less than this pre-determined bit number so that this color data is tabled look-up.
4. color management circuit as claimed in claim 3, wherein this pre-determined bit number of this color data is 12 positions, this look-up table according to 10 positions in these 12 positions to table look-up.
5. color management circuit as claimed in claim 3, wherein when this color data during less than a critical value, this first non-linear conversion circuit is that the value of being searched is directly exported, with as this first translation data; And when this color data during greater than this critical value, this first non-linear conversion circuit is that the value of being searched is adjusted a prearranged multiple, with as this first translation data.
6. color management circuit as claimed in claim 1, wherein the matrix element in this color matrix conversions circuit determines according to this panel transfer characteristic.
7. color management circuit as claimed in claim 1, wherein this second non-linear conversion circuit is realized through a look-up table.
8. color management circuit as claimed in claim 1, wherein this panel transfer characteristic is a gamma characteristic.
9. color management circuit as claimed in claim 1, wherein this color data is red, green and the blue color data.
10. a color management method is applied in the display, and a panel of this display has a panel transfer characteristic, and this color management method includes:
One nonlinear color data is carried out one first non-linear conversion to produce first translation data of a linearity;
This first translation data is carried out linear matrix conversion to produce matrix conversion data; And
These matrix conversion data are carried out one second non-linear conversion to produce one second translation data to this panel;
Wherein, this second non-linear conversion characteristic combines a whole transfer characteristic of this panel transfer characteristic, is essentially a linear transformation.
11. color management method as claimed in claim 10, wherein this first non-linear conversion step is realized by a look-up table.
12. color management method as claimed in claim 11, wherein this color data is represented by a pre-determined bit number, and this look-up table is according to being less than this pre-determined bit number so that this color data is tabled look-up.
13. color management method as claimed in claim 12, wherein this pre-determined bit number of this color data is 12 positions, this look-up table according to 10 positions in these 12 positions to table look-up.
14. color management method as claimed in claim 12 when this color data during less than a critical value, is that the value of being searched is directly exported wherein, with as this first translation data; And when this color data during greater than this critical value, be that the value of being searched is adjusted a prearranged multiple, with as this first translation data.
15. color management method as claimed in claim 10, the matrix element in wherein should the matrix conversion of linearity determines according to this panel transfer characteristic.
16. color management method as claimed in claim 10, wherein this second non-linear conversion step is realized by a look-up table.
17. color management method as claimed in claim 10, wherein this panel transfer characteristic is a gamma characteristic.
18. color management method as claimed in claim 10, wherein this color data is red, green and the blue color data.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1991956A (en) * | 2005-12-29 | 2007-07-04 | 采亦国际顾问有限公司 | Non-linear mixed color error correction method and device |
| CN101169928A (en) * | 2006-10-27 | 2008-04-30 | 财团法人工业技术研究院 | Color regulation circuit, digit color regulation device and multimedia device applying same |
| CN101547362A (en) * | 2009-05-06 | 2009-09-30 | 天津大学 | Compatible transmission method for wide-gamut digital TV signals |
-
2009
- 2009-11-17 CN CN200910224507A patent/CN102065311B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1991956A (en) * | 2005-12-29 | 2007-07-04 | 采亦国际顾问有限公司 | Non-linear mixed color error correction method and device |
| CN101169928A (en) * | 2006-10-27 | 2008-04-30 | 财团法人工业技术研究院 | Color regulation circuit, digit color regulation device and multimedia device applying same |
| CN101547362A (en) * | 2009-05-06 | 2009-09-30 | 天津大学 | Compatible transmission method for wide-gamut digital TV signals |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2009-219060A 2009.09.24 |
| JP特开2009-267488A 2009.11.12 |
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