CN100340119C - Method and system for correcting uniformity of projection display color - Google Patents
Method and system for correcting uniformity of projection display color Download PDFInfo
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- CN100340119C CN100340119C CNB2004100256480A CN200410025648A CN100340119C CN 100340119 C CN100340119 C CN 100340119C CN B2004100256480 A CNB2004100256480 A CN B2004100256480A CN 200410025648 A CN200410025648 A CN 200410025648A CN 100340119 C CN100340119 C CN 100340119C
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003086 colorant Substances 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
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Abstract
The present invention discloses a method and a system for correcting the uniformity of projection displaying colors, which uniformly divides a display screen into the correcting areas with the numbers of n1*n2. The present invention has (n1+1) *(n2+1) correcting points, and the brightness variation of red, green and blue of each correcting point is realized by the value of a register in (n1+1) *(n2+1) matrixes corresponding to the three colors in regulating circuits; brightness correcting value is arranged in the register, and the brightness correcting value can be overlapped with the brightness value of video signals of corresponding correcting points together and are used as the output of the video signals; the brightness value of the red, green and blue on each correcting point is collected through CCD, corresponding brightness correcting value is regulated to make the brightness proportion of three primary colors into the same value, and therefore, the uniformity of the colors is in correction. A two-dimensional surface array CCD can be used by the present invention for quickly measuring the output two-dimensional intensity distribution from a projector. By changing the brightness value of the video signals in a small amplitude, the uneven distribution of the colors of the projection display system can be effectively improved.
Description
Technical field
The present invention relates to a kind of Color Homogeneity Correction Method Of Projection Display and system thereof.
Background technology
Along with the continuous development of microelectric technique and liquid crystal process manufacturing technology and the continuous decline of development cost thereof, projection display system more and more has been applied to fields such as military commanding office, enterprise, commerce, scientific research and education and public place of entertainment.Because people are more and more higher to the quality requirement of display frame, therefore the look uniformity of projection display system also receives much concern.In projection display system, because the light beam that incides on the optical thin film is not a directional light, but have the cone-shaped beam of certain angle of divergence, thereby both sides will produce aberration after optical thin film reflection or transmission, thereby cause the inhomogeneous of projector's color.
Summary of the invention
The purpose of this invention is to provide a kind of Color Homogeneity Correction Method Of Projection Display and system thereof.
Bearing calibration: display screen is equally divided into n1 * n2 correcting area, (n1+1) * (n2+1) individual check point is arranged, the brightness of the red, green, blue of each check point change by in the regulating circuit with three colors corresponding (n1+1) * (n2+1) matrix in the value of register realize; What deposit in the register is the correcting luminance value, and the video luminance signal value of these correcting luminance values meetings and corresponding check point is superimposed, as the output of final video signal; By CCD gather red, green, blue on each check point brightness value and regulate corresponding correcting luminance value, make that the brightness ratio of three primary colors is identical, thereby reach the correction that realizes color homogeneity.
Corrective system: it is connected with high accuracy CCD, computer, graphics video signal generator, projector, projection screen in turn, and computer and projector join.
Advantage of the present invention is:
1) utilizes area array CCD can be easy to obtain the two-dimentional Luminance Distribution of projector's output, thereby obtain to measure fast;
2) adopt high accuracy CCD, can reach data and measure accurately;
3) by changing the brightness value of vision signal by a small margin, reach adjusting to the brightness ratio of red, green, blue three looks of projector, can effectively improve the uneven distribution of color, improve the image quality of projection display system.
Description of drawings
Fig. 1 is a projection display color homogeneity corrective system block diagram;
Fig. 2 is a projector architecture schematic diagram of the present invention;
Fig. 3 is Color Homogeneity Correction Method Of Projection Display's flow chart;
Fig. 4 is that projection screen correcting area of the present invention is cut apart schematic diagram;
Fig. 5 is that check point of the present invention is provided with precedence diagram;
Fig. 6 is the flow chart that correction data of the present invention is sent into register.
Embodiment
Color Homogeneity Correction Method Of Projection Display is equally divided into n1 * n2 correcting area with display screen, (n1+1) * (n2+1) individual check point is arranged, each check point red, green, blue brightness change by in the regulating circuit with three colors corresponding (n1+1) * (n2+1) matrix in the value of register realize: be that display screen with 4:3 is equally divided into 32 * 24 or 16 * 12 correcting areas, 33 * 25 or 17 * 13 check points are arranged, each check point red, green, blue brightness change by in the regulating circuit with three colors corresponding 33 * 25 or 17 * 13 matrixes in the value of register realize.
Said display screen is equally divided into n1 * n2 correcting area: the corrected value that is meant the red, green, blue of correcting area is determined by the corrected value linear interpolation of check point around it.
What deposit in the register is the correcting luminance value: be by computer calculate the correction of brightness of red, green, blue write in the register of projector by serial ports or parallel port.Gather the brightness value of red, green, blue on each check point by CCD: be to adopt two-dimensional array CCD that the brightness of projector's output is gathered; Require CCD to place the projection screen front.
Projector is connected with video preprocessor treatment circuit, look even correcting register, drive circuit, display screen, camera lens in turn.
As shown in Figure 1, the present invention mainly comprises computer, high accuracy CCD, graphics video signal generator, projector, projection screen.When the color between two zones of image on projection screen that produced by the graphics video signal generator was inconsistent, its brightness ratio that shows as the red, green, blue three primary colors was inconsistent.By high accuracy CCD gather red, green, blue on each zone on the projection screen brightness value and regulate corresponding correcting luminance value, input to projector by computer by serial ports or parallel port, make that the brightness ratio of three primary colors is identical, thereby realize the correction of color homogeneity.
As shown in Figure 2, projector mainly comprises video preprocessor treatment circuit, look even correcting register, drive circuit, display screen and camera lens.System is equally divided into 32 * 24 or 16 * 12 correcting areas with the display screen of 4:3 among the figure, and 33 * 25 or 17 * 13 check points are arranged.The brightness of the red, green, blue of each check point change can by in the regulating circuit with three colors corresponding 33 * 25 or 17 * 13 matrixes in the value of register realize.That deposits in these registers is mainly the correcting luminance value, these correcting luminance values can and being superimposed of corresponding check point through the pretreated video luminance signal value of video, control exporting by drive circuit again as the final video signal by camera lens.
As shown in Figure 3, the uniform process of automatic correcting colour of system is as follows: the signal that is produced red, green, blue three looks by the timesharing of computer control graphics video signal generator, measure the gray value (being brightness value) of red, green, blue three looks that project on the screen respectively by CCD, and calculate the ratio between red, green, blue three looks and the size of corresponding inhomogeneities thus, obtain the correction of red, green, blue brightness, promptly 33 * 25 or 17 * 13 correction matrix is written in the register of projector by serial ports or parallel port by computer then.Proofread and correct later image and measure by CCD once more, to determine whether proofread and correct later uniformity satisfies pre-provisioning request; To continue computed correction on this basis as not satisfying, till reaching desired color homogeneity.
As shown in Figure 4, whole projection screen is equally divided into 32 * 24 or 16 * 12 correcting areas, and 33 * 25 or 17 * 13 check points are arranged.Each check point all has three registers to be used for storing the corrected value of r, g, three colors of b, and the corrected value of the r of correcting area, g, b is determined by the corrected value linear interpolation of check point around it.
As shown in Figure 5, represented the order setting of 33 * 25 or 17 * 13 check points among the figure.Corrected value will be delivered in 33 * 25 or 17 * 13 registers according to the order of this check point.
As shown in Figure 6, at first be to select correction mode, (selecting 33 * 25 check points or 17 * 13 check points); Gating writes correction data position (this register is write 0 earlier, write 1 again) then; Next data are write R, G, B-register respectively in proper order; Whether last judgment data has been write, and has write and has then finished the input data.
Claims (5)
1. Color Homogeneity Correction Method Of Projection Display, it is characterized in that display screen is equally divided into n1 * n2 correcting area, (n1+1) * (n2+1) individual check point is arranged, the brightness of the red, green, blue of each check point change by in the regulating circuit with three colors corresponding (n1+1) * (n2+1) matrix in the value of register realize; What deposit in the register is the correcting luminance value, and the video luminance signal value of these correcting luminance values meetings and corresponding check point is superimposed, as the output of final video signal; By CCD gather red, green, blue on each check point brightness value and regulate corresponding correcting luminance value, make that the brightness ratio of three primary colors is identical, thereby reach the correction that realizes color homogeneity that wherein, n1 * n2 is 32 * 24 or 16 * 12.
2. a kind of Color Homogeneity Correction Method Of Projection Display according to claim 1, it is characterized in that: said display screen is equally divided into n1 * n2 correcting area, (n1+1) * (n2+1) individual check point is arranged, each check point red, green, blue brightness change by in the regulating circuit with three colors corresponding (n1+1) * (n2+1) matrix in the value of register realize: be that 4: 3 display screen is equally divided into 32 * 24 or 16 * 12 correcting areas, 33 * 25 or 17 * 13 check points are arranged, each check point red, green, blue brightness change by in the regulating circuit with three colors corresponding 33 * 25 or 17 * 13 matrixes in the value of register realize.
3. a kind of Color Homogeneity Correction Method Of Projection Display according to claim 1 is characterized in that: said display screen is equally divided into n1 * n2 correcting area: the corrected value that is meant the red, green, blue of correcting area is determined by the corrected value linear interpolation of check point around it.
4. a kind of Color Homogeneity Correction Method Of Projection Display according to claim 1 is characterized in that: what deposit in the said register is the correcting luminance value: be by computer calculate the correction of brightness of red, green, blue write in the register of projector by serial ports or parallel port.
5. a kind of Color Homogeneity Correction Method Of Projection Display according to claim 1 is characterized in that: said by the brightness value of CCD collection red, green, blue on each check point: as to be to adopt two-dimensional array CCD that acquisition time is carried out in the brightness of the red, green, blue of projector's output; Require CCD to place the projection screen front.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100256480A CN100340119C (en) | 2004-06-22 | 2004-06-22 | Method and system for correcting uniformity of projection display color |
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| CNB2004100256480A CN100340119C (en) | 2004-06-22 | 2004-06-22 | Method and system for correcting uniformity of projection display color |
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| CN1595491A CN1595491A (en) | 2005-03-16 |
| CN100340119C true CN100340119C (en) | 2007-09-26 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2298223C2 (en) * | 2005-04-25 | 2007-04-27 | Самсунг Электроникс Ко., Лтд. | System and method for correcting dark tones on digital photographs |
| CN100417199C (en) * | 2005-11-08 | 2008-09-03 | 普立尔科技股份有限公司 | A digital camera and its method to correct brightness |
| US8098265B2 (en) * | 2008-10-10 | 2012-01-17 | Ostendo Technologies, Inc. | Hierarchical multicolor primaries temporal multiplexing system |
| CN101854558B (en) * | 2010-05-18 | 2012-04-18 | 大连海事大学 | Method for correcting color domain in treating video signals of LED display screen |
| CN102026003B (en) * | 2010-12-24 | 2012-08-29 | 广东威创视讯科技股份有限公司 | Method for correcting colors of multi-screen splicing wall |
| CN102280097B (en) * | 2011-08-31 | 2013-02-13 | 广东威创视讯科技股份有限公司 | Display brightness and chrominance uniformity regulating method |
| CN103139575A (en) * | 2011-11-28 | 2013-06-05 | 万正彪 | Image processing device capable of achieving multiple-screen image displaying and processing method thereof |
| TWI639151B (en) | 2013-03-15 | 2018-10-21 | 美商傲思丹度科技公司 | Dynamic gamut display systems, methods, and applications thereof |
| CN103150986B (en) * | 2013-03-20 | 2015-04-08 | 长春希达电子技术有限公司 | Method for collecting and calibrating multiple cameras of LED (Light-Emitting Diode) display screen |
| US10388251B2 (en) * | 2014-10-03 | 2019-08-20 | Sharp Kabushiki Kaisha | Image processing device, display device, position determining device, position determining method, and recording medium |
| CN105611259B (en) * | 2015-12-17 | 2017-12-29 | 苏州佳世达光电有限公司 | LCD projector color uniformity method of adjustment and adjusting apparatus |
| CN106500969B (en) * | 2016-11-17 | 2019-07-26 | 深圳Tcl新技术有限公司 | Display screen homogeneity testing method and display screen uniformity test system |
| CN108737806B (en) * | 2018-08-30 | 2020-05-08 | Oppo广东移动通信有限公司 | Projector color correction method and device and computer storage medium |
| CN113407139B (en) * | 2021-07-01 | 2022-10-21 | 岳阳晶显科技有限公司 | Liquid crystal display screen intelligent control regulation and control method and system based on cloud computing |
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Patent Citations (4)
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|---|---|---|---|---|
| CN1308465A (en) * | 1999-12-18 | 2001-08-15 | Lg电子株式会社 | Image distortion correcting deivce and method and image display |
| US6558006B2 (en) * | 2000-08-29 | 2003-05-06 | Olympus Optical Co., Ltd. | Image projection display apparatus using plural projectors and projected image compensation apparatus |
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Assignee: Keting Optical Tech. Co., Ltd., Hangzhou Assignor: Zhejiang University Contract fulfillment period: 2007.10.8 to 2013.12.31 contract change Contract record no.: 2008330000348 Denomination of invention: Method and system for correcting uniformity of projection display color Granted publication date: 20070926 License type: Exclusive license Record date: 2008.9.3 |
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Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.10.8 TO 2013.12.31 Name of requester: HANGZHOU KETING OPTICAL TECHNOLOGY CO. Effective date: 20080903 |
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Granted publication date: 20070926 Termination date: 20110622 |