CN2704170Y - Apparatus for improving projection display colour homogeneity - Google Patents

Apparatus for improving projection display colour homogeneity Download PDF

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Publication number
CN2704170Y
CN2704170Y CN 200420037024 CN200420037024U CN2704170Y CN 2704170 Y CN2704170 Y CN 2704170Y CN 200420037024 CN200420037024 CN 200420037024 CN 200420037024 U CN200420037024 U CN 200420037024U CN 2704170 Y CN2704170 Y CN 2704170Y
Authority
CN
China
Prior art keywords
projector
projection display
computer
homogeneity
projection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 200420037024
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Chinese (zh)
Inventor
陈颖
李海峰
刘旭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANGZHOU CYBER OPTO-ELECTRONIC TECHNOLOGY Co Ltd
Zhejiang University ZJU
Original Assignee
HANGZHOU CYBER OPTO-ELECTRONIC TECHNOLOGY Co Ltd
Zhejiang University ZJU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HANGZHOU CYBER OPTO-ELECTRONIC TECHNOLOGY Co Ltd, Zhejiang University ZJU filed Critical HANGZHOU CYBER OPTO-ELECTRONIC TECHNOLOGY Co Ltd
Priority to CN 200420037024 priority Critical patent/CN2704170Y/en
Application granted granted Critical
Publication of CN2704170Y publication Critical patent/CN2704170Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an apparatus for improving the homogeneity of projection display color. The utility model is sequentially connected with a high-definition CCD, a computer, a graph generator of video signals, a projector and a projection screen, wherein, the computer is connected with the projector. The projector is sequentially connected with a video frequency preprocessing circuit, a color homogeneity correcting register, a drive circuit, a display screen and a lens. The utility model utilizes the two-dimensional area array CCD to realize the rapid detection for the two-dimensional brightness distribution output by the projector. The utility model effectively improves the color heterogeneous distribution of a projection display system through slight altering the brightness value of the video signals with small amplitude.

Description

Improve the projection display color homogeneity device
Technical field
The utility model relates to a kind of projection display color homogeneity device that improves.
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 utility model provides a kind of projection display color homogeneity device that improves.
Corrective system: it is connected with high accuracy CCD, computer, graphics video signal generator, projector, projection screen in turn, and computer and projector join.
The utility model has the advantages that:
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 improves projection display color homogeneity apparatus structure block diagram;
Fig. 2 is the utility model projector architecture schematic diagram;
Fig. 3 improves the projection display color homogeneity method flow diagram;
Fig. 4 is that the utility model projection screen correcting area is cut apart schematic diagram;
Fig. 5 is that the utility model check point is provided with precedence diagram;
Fig. 6 is the flow chart that the utility model correction data is sent into register.
Embodiment
Improving the projection display color homogeneity method is that 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.
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 utility model 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 4: 3 display screen 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 (2)

1. one kind is improved the projection display color homogeneity device, it is characterized in that it is connected with high accuracy CCD, computer, graphics video signal generator, projector, projection screen in turn, and computer and projector join.
2. a kind of projection display color homogeneity device that improves according to claim 1 is characterized in that: said projector: it is connected with video preprocessor treatment circuit, look even correcting register, drive circuit, display screen, camera lens in turn.
CN 200420037024 2004-06-22 2004-06-22 Apparatus for improving projection display colour homogeneity Expired - Fee Related CN2704170Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200420037024 CN2704170Y (en) 2004-06-22 2004-06-22 Apparatus for improving projection display colour homogeneity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200420037024 CN2704170Y (en) 2004-06-22 2004-06-22 Apparatus for improving projection display colour homogeneity

Publications (1)

Publication Number Publication Date
CN2704170Y true CN2704170Y (en) 2005-06-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200420037024 Expired - Fee Related CN2704170Y (en) 2004-06-22 2004-06-22 Apparatus for improving projection display colour homogeneity

Country Status (1)

Country Link
CN (1) CN2704170Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340119C (en) * 2004-06-22 2007-09-26 浙江大学 Method and system for correcting uniformity of projection display color
CN101719363A (en) * 2009-11-23 2010-06-02 康佳集团股份有限公司 Luminance uniformity adjusting method and system of displayer
CN107113412A (en) * 2014-07-31 2017-08-29 三星电子株式会社 Display device, display calibration equipment, display correction system and display bearing calibration
WO2020042570A1 (en) * 2018-08-27 2020-03-05 深圳光峰科技股份有限公司 Laser light source-based imaging system, modulation method therefor, and storage medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340119C (en) * 2004-06-22 2007-09-26 浙江大学 Method and system for correcting uniformity of projection display color
CN101719363A (en) * 2009-11-23 2010-06-02 康佳集团股份有限公司 Luminance uniformity adjusting method and system of displayer
CN107113412A (en) * 2014-07-31 2017-08-29 三星电子株式会社 Display device, display calibration equipment, display correction system and display bearing calibration
CN107113412B (en) * 2014-07-31 2019-06-14 三星电子株式会社 Display device, display correction device, display correction system and display bearing calibration
WO2020042570A1 (en) * 2018-08-27 2020-03-05 深圳光峰科技股份有限公司 Laser light source-based imaging system, modulation method therefor, and storage medium

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C17 Cessation of patent right
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Granted publication date: 20050608