CN102063001A - Solid light source single-system time-division color projector and projecting method - Google Patents
Solid light source single-system time-division color projector and projecting method Download PDFInfo
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Abstract
The invention discloses a single-system time-division projector and a projecting method. The principle and the structure of the projector are quite simple, i.e. a color principle is realized by adopting a single chip monochromatic high-resolution (1,024*768 or higher) LCD (Liquid Crystal Display) board, a tristimulus solid semiconductor luminescent device (LED or laser), a single-path optical processing and a lens. In the invention, a color signal is decomposed into tristimulus signals through a large scale integrated circuit, and the tristimulus signals are displayed in a time-division mode by using an LCD; and because the time-division time is quite short, which is 10 microseconds or below, and due to the light pause effect of the human eyes, the signals still look like a complete color image.
Description
Technical field
The present invention relates to a kind of single system timesharing colour projection technology.
Technical background
Development along with the modern video technology, more and more tend to the visual effect of high-resolution and giant-screen, the requirement that the video of tradition sharpness (referring to that resolution is at 800*600 and following) or digital projector can not satisfy the large-screen high-resolution projection far away, therefore increasing high-resolution projector scheme is adopted by people, at first be three big projection display technique (LCD of main flow, LCOS, DLP) manufacturer the resolution of display chip bring up to 1024*768 and more than, especially at present the monochromatic LCD liquid crystal board of the most ripe monolithic high resolving power, through the many decades development, full maturity and cheap, the supporting convenience of related device, simultaneously because the progressively maturation of solid luminescence light source technology, subminiaturization, guardian technique bottlenecks such as monolithic high-brightness have been obtained important breakthrough, and this just lays prerequisite basic condition for the projection of realization high-resolution.
The method that realizes the high-resolution projection at present mainly contains two big classes, first class is the lcd technology of taking as the leading factor with LCD (through mode liquid crystal display device), as shown in Figure 1, its primary structure is: adopting three LCD is image display device, with HID (metal-halide gas discharge lamps) is light source, and redgreenblue beam split eyeglass and tristimulus image synthetic prisms are set.Principle of work is: the white light that the HID light source sends resolves into three kinds of primary colours of RGB through redgreenblue beam split eyeglass, shine respectively on each self-corresponding LCD, image processing system is decomposed into coloured image three basic colors of RGB and controls three LCD respectively, through the image synthetic prisms red-green-blue image on three LCD is synthesized coloured image.
Before three LCD technology utilizations, once adopted monolithic colour LCD technology in a large number, simple in structure, need not beam splitting system and image synthesis system, but because need realize high-resolution colour picture on than the small size liquid crystal display in a slice, manufacture difficulty is very big, and light transmission rate is very low, though adopt large tracts of land monolithic colour liquid crystal manufacturing technology can improve resolution and transmittance, but can cause the product rejection rate to improve, machine is bulky, drawbacks such as brightness uniformity difference, can only realize low resolution low (800*600 and following) and than low-light level, its sharpness and brightness all can not be satisfied the requirement of high-resolution giant-screen; Three LCD technology are to adopt the synthetic colored HD image of three monochromatic LCD, the high-resolution projection liquid crystal screen of small size manufacture difficulty are reduced greatly, than being easier to realize high-resolution, the drop shadow effect of high brightness.
The drawback of above-mentioned LCD scheme is: the components and parts that must use are too much, as colour splitting system, three primary colours display system and image synthesis system, cause the integrated cost height, volume is bigger, and optical device is manufactured difficulty, machine debugging complexity etc., therefore be unfavorable for the popular use of popularizing, be applied to the occasion of having relatively high expectations usually.
Second largest class is the reflection type projection technology of taking as the leading factor with DLP (digital micro-mirror display technique), its primary structure is: adopting a slice to three DMD (digital micro-mirror chip) is image display device, with (metal-halide gas discharge lamps) is light source, monolithic DLP structural principle is simpler, the white light that the HID light source sends is decomposed into some colors (3-6 look) through a colour wheel or prism and projects on the DMD, amplify via the camera lens projection after reflection, realize the large-sized solor video picture; This scheme also can realize high-resolution, the drop shadow effect of high brightness.But its Primary Component colour wheel (or prism) manufacturing process complexity requires highly, and mechanical locomotory apparatus spare is arranged, and the life-span is short and be easier to damage.Three DLP structural principles are quite complicated, the white light that the HID light source sends resolves into three kinds of primary colours of RGB through redgreenblue beam split eyeglass, shine respectively on each self-corresponding DMD, through the image synthetic prisms red-green-blue image of three DMD is synthesized coloured image again.Such scheme also can be realized high-resolution, the drop shadow effect of high brightness.
The drawback of three DLP schemes is identical with three LCD, all must use a large amount of components and parts, comprise multichannel display system and multiplex optical system, the cost height, volume is big, and the manufacturing and process debugging etc. are all quite difficult, particularly uses the scheme of three display devices, its image is synthetic to be required highly, and the manufacturing of synthetic prisms and the process debugging of complete machine are all had high requirement.
At present non-mainstream display technique also have LCOS (reflection-type liquid-crystal display device), SP (another kind of reflective micro-mirror display spare), or the like, but the appearance time is shorter, technology is still immature, price is higher, and indexs such as resolution and brightness all fail to reach the highlighted level of high definition, remain progressively to be improved and experience market and time test.
Along with the development of solid state light emitter, the scheme of using led light source in projector also engenders.As shown in Figure 2, carry out projection because it still adopts with traditional projector same spacing color mixed method, so its structure is still very complicated.
The shadow casting technique of above-mentioned three-chip type scheme adopts spacing color mixed method to carry out projection imaging, be that tristimulus image passes through synthetic prisms and directly superposes, this method at first is that three primary light source obtains tristimulus image respectively under three cover respective imaging systems, and then image three-colo(u)r is superposeed by synthetic prisms, this additive process need just can obtain final colour projection's image with point-to-point stack the in the image three-colo(u)r.Spacing color mixed method at first will obtain tristimulus image, so needs three tunnel display systems and three tunnel optical systems, the complexity that projector architecture is become, and the cost height, volume is big, and the manufacturing and process debugging etc. are all quite difficult.In addition,, the requirement of synthetic prisms is improved the further complicated structure of whole projector because superimposed image need superpose to image three-colo(u)r is point-to-point.Though and indivedual time mixed-color methods that adopted are arranged also in the shadow casting technique of above-mentioned one chip scheme, but because technical conditions restriction, therefore fail to adopt the solid luminescent light source of high-power small size, in brightness, contrast and colour developing, all fail to reach satisfied effect.
Summary of the invention
At the problem that prior art exists, one of purpose of the present invention is to provide a kind of colour projection's method of timesharing colour mixture.
Another object of the present invention is to provide a kind of simple in structure, volume is little, the high-resolution color projector of in light weight, long service life.
For achieving the above object, single system timesharing projecting method of the present invention, concrete steps are: the three primary light source timesharing is radiated on the cover imaging system, obtains complete coloured image by the imaging time difference of three primary light source on a cover imaging system.
Further, described three primary light source is monolithic three-primary color LED hybrid light source, three single-primary-color LED monochromatic sources or is three rifle list primary colours LASER Light Source
Further, the tristimulus image sequential that obtains on the sequence of light of three primary light source and the imaging system is synchronous.
Further, described imaging system is resolution 1024*768 or the above monochromatic LCD liquid crystal board of monolithic
Further, three primary light source also needed to converge by the light source synthetic prisms before shining imaging system, made three primary light source all can shine the relevant position of imaging system.
Single system timesharing of the present invention projector, comprise three primary light source, light source synthetic prisms, single channel imaging system and camera lens, the three primary light source timesharing shines imaging system by synthetic prisms respectively with three primary colours light, the imaging system timesharing receives three primary colours light and timesharing shows tristimulus image, obtains coloured image by the camera lens irradiation.
Further, described light source three primary colors LED light source or tricolor laser light source, its light-emitting area of led light source are less than 15*12MM, and luminosity is greater than 140Lm/W, and LASER Light Source is diameter 14-20mm at distance luminotron the place ahead 4 centimeters facula areas.
Further, described imaging system comprises resolution 1024*768 or the above monochromatic LCD liquid crystal board of monolithic.
Further, also comprise the sequential sync control device in the described imaging system, it is synchronous that this sequential sync control device is used to control the tristimulus image sequential that shows on the sequence of light of described three primary light source and the described imaging system.
Drawbacks such as the solution of the present invention has overcome that cost height, volume that traditional necessary multichannel display system of high-resolution projector and multiplex optical system must use a large amount of components and parts to cause are big, the manufacturing and process debugging difficulty.Utilized the physiological characteristic of human vision, originally the colour projection's mode that needs three LCD to cooperate the three primary colours light path to realize is simplified to a slice LCD cooperates a cover light path can realize colour projection, simple and practical, economic and reliable, volume reduce, weight saving, adjust simple especially; It is many thoroughly to have solved other scheme components and parts, adjusts defectives such as complicated, less economical.
Description of drawings
Fig. 1 is the light path synoptic diagram of traditional spacing color mixed method projector;
Fig. 2 is the existing light path synoptic diagram that adopts solid state light emitter projector;
Fig. 3 is the light path synoptic diagram of projector in the embodiment of the invention 1;
Fig. 4 is the light path synoptic diagram of projector in the embodiment of the invention 2.
Embodiment
The present invention adopts existing monochromatic high-resolution LCD image display device, introduces up-to-date solid light source LED or semiconductor laser light resource, the theoretical small size high-resolution colour projection scheme cheaply that realizes of operate time color separation; This programme has been cancelled light source color separation and image synthesis system complicated in traditional projector, simplify light source and light channel structure greatly, reduce cost and reduced volume, because having adopted up-to-date is the solid luminescence technology and the light emitting semiconductor device of sign with environmental protection and energy saving, greatly reduce use cost, and greatly improved serviceable life of projector, be a kind of innovative modern shadow casting technique theory and practice.
The current state-of-the-art environment-friendly type semiconductor light emitting light source that the present invention adopts is that led light source and Solid State Laser light source are as projection light source.The semiconductor light emitting technology is one of greatest invention of 20th century, this technology has been overturned principle of luminosity, production technology and the production technology of conventional light source fully, use-pattern and consumption concept are a kind of brand-new environmental protection light sources that produces under the new and high technology background.Its appearance has embodied novelty and the revolutionary huge advantage of new material, new technology, new technology.Be characterized in cleanliness without any pollution, volume is little, light efficiency is high, extra long life (20 years), low voltage safety drive, and belongs to the new type light source of environmental protection.Semiconductor light sources begins to carry out utilization at lighting field the beginning of this century, and present stage has been widely used in lighting field and other field.This project is introduced the solid luminescence technology among the global design of projector, has merged current state-of-the-art LED technology and semiconductor laser technique; Thoroughly solved several big drawback that gas discharge bulb (HID) that traditional light source of projector adopts is produced: drawback one is the environmental pollution of producing and using link to produce, must adopt a large amount of mercury, lead, rare earth metal etc. because make Metal halogen lamp, these poisonous and harmful substances also can produce secondary pollution along with the termination of bulb life, cause bigger environmental problem, improve the recycling cost; Need the high heat of high temperature in the production, consume a large amount of energy.Drawback two is that production technology and complex process and product stability and consistance are poor, drawback three is to use the environmental requirement height, produce the high temperature of nearly thousand degree when using because of the HID bulb, need the high efficiency wind-guiding exhaust system of design, and drive bulb and also need thousands of and even up to ten thousand volt high pressure, its driving power is complicated unusually.Drawback three is that light efficiency is low, light decay is big, the life-span is short.The serviceable life of HID lamp is in several thousand hours, in use the light decay phenomenon can take place, important indicator such as brightness and colour temperature all can descend thereupon, badly influence the effect of image, its light efficiency has only 100lm/W, a large amount of energy fails to be converted into light output, loses in vain but be converted into harmful heat, and its energy transition rate is lower than 40%.And comprise a large amount of infraredly and ultraviolet in the light, and equipment is worked the mischief, the various filters of crossing need be set isolate, further improved cost of products.Owing to there is above unsurmountable drawback, the production of tradition HID projection lamp is monopolized by international giant for these years always, and price is very high, influences the acquisition cost and the use cost of projector greatly, the life-span of lamp is short, volume is big, also all has influence on convenience and economy that projector uses.The HID bulb of present stage has been gone to the peak through the research and development of decades, does not almost have room for promotion again, and its technical bottleneck can't be innovated breakthrough.And the semiconductor light emitting production technology is ripe day by day, general semiconductor factory all can produce, along with the raising of production technology and technology and performance, the light efficiency straight line improves, cost progressively descends, and semiconductor light emitting belongs to " cold light ", promptly only luminous, do not generate heat (it is luminous again to be different from ordinary light source heating earlier) and, can send the very pure red-green-blue of colourity by technological means, thereby deduce the coloured image of wide colour gamut, satisfy high-end projection demand.This project is exactly by successfully introducing the semiconductor light emitting principle, on technology, carry out the necessary technology transformation, make it to meet the basic demand of projection light source, by merging relevant light source control technology, coloured image sequential display techniques etc. have produced the New Projection Display with the cheap economic portable time equivalence feature of energy-saving, environment-friendly and high-efficiency of new generation.
In addition, the present invention has adopted the time mixed-color method to realize that colour projection's timesharing color schemes claims the time mixed-color method again, be that with spacing color mixed ratio juris difference the former is that tristimulus image is changed stack chronologically fast, the latter then is that tristimulus image passes through synthetic prisms and directly superposes, the former only needs display device of a cover light path, and the latter needs three display devices of three cover light paths.An important prerequisite of time mixed-color method is all to be divided into primary colours to image and light source, image is presented at respectively with on a slice display device by the three primary colours sequential, three primary light source is then pressed the sequential synchronous light-emitting of image, it requires the display frequency of image will reach human eye to discover degree less than flicker, the refresh rate that promptly is higher than per second 120 frames, the excitation of light source is very high, and brightness wants that enough and bright dark alternately time requirement is extremely short.Therefore synthetic prisms in the projector of the present invention just converges three primary colours light, does not need also will play as synthetic prisms in traditional projection the effect of composograph, and it is lower to compare in traditional projector its parameter request of synthetic prisms, and structure is more simple.
Specifically introduce two kinds of projectors of the present invention below in conjunction with accompanying drawing:
Embodiment 1:
As shown in Figure 3, projector of the present invention comprises red LED light source 11, green LED light source 12, blue led light source 13, synthetic prisms 2, Monolithic LC D liquid crystal board 3 and camera lens 4, red LED light source 11, green LED light source 12, blue led light source 13 in certain sequence, converge by synthetic prisms 2, respectively with ruddiness, green glow and blue light illumination are on a slice LCD liquid crystal board 3,3 timesharing of LCD liquid crystal board receive three primary colours light and timesharing shows tristimulus image, it is synchronous that this process need be controlled the tristimulus image sequential that obtains on the sequence of light of three primary light source and the LCD liquid crystal board 3, and the timesharing of control three primary light source shows the time in 10 microseconds or following, obtains colour projection's image by camera lens 4 irradiations at last.Led light source among the present invention is the solid luminescence light source of the high light efficiency of a kind of ultra-small volume, high brightness.Its light-emitting area of led light source is less than 15*12MM, and luminosity is greater than 140Lm/W, and LASER Light Source is about diameter 18mm at distance luminotron the place ahead 4 centimeters facula areas.
Embodiment 2:
As shown in Figure 4, another kind of form for projector of the present invention, compare with the projector of embodiment 1, it changes the LED three primary light source into red laser light source 11 ', green laser light source 12 ', blue laser light source 13 ', other structure all with embodiment 1 in identical.
Theory structure of the present invention is very simple, promptly adopting the monochromatic high resolving power of monolithic (1024*768 or more than) LCD LCD panel to add three primary colours solid semiconductor luminescent device (LED or laser) adds the single channel optical processing and adds camera lens and realize colored principle: by large scale integrated circuit colour signal is resolved into tristimulus signals (identical with three video pictures in above-mentioned three kinds of schemes) and show that with a slice LCD timesharing (showing when being different from three) is very short because of the time of timesharing, in 10 microseconds or following, because " light is temporary " of eye effect seems the coloured image that remains complete.
It is to be noted and any distortion of making according to the specific embodiment of the present invention all do not break away from the scope that spirit of the present invention and claim are put down in writing.
Claims (10)
1. single system timesharing projecting method, concrete steps are: the three primary light source timesharing is radiated on the cover imaging system, obtains complete coloured image by the imaging time difference of three primary light source on imaging system.
2. single system timesharing projecting method as claimed in claim 1 is characterized in that, described three primary light source is three primary colors LED light source or is the tricolor laser light source
3. single system timesharing projecting method as claimed in claim 1 is characterized in that the tristimulus image sequential that obtains on the sequence of light of three primary light source and the imaging system is synchronous.
4. single system timesharing projecting method as claimed in claim 1 is characterized in that, described imaging system is resolution 1024*768 or the above monochromatic LCD liquid crystal board of monolithic.
5. single system timesharing projecting method as claimed in claim 1 is characterized in that, three primary light source also needed to converge by synthetic prisms before shining imaging system, made three primary light source all can shine the imaging system relevant position.
6. single system timesharing projecting method as claimed in claim 1 is characterized in that, the three primary light source timesharing shows that the time interval is in 10 microseconds or following.
7. single system timesharing projector, it is characterized in that, comprise three primary light source, synthetic prisms, imaging system and camera lens, the three primary light source timesharing shines a cover imaging system by synthetic prisms respectively with three primary colours light, the imaging system timesharing receives three primary colours light and timesharing shows tristimulus image, obtains coloured image by the camera lens irradiation.
8. single system timesharing as claimed in claim 1 projector, it is characterized in that, described three primary light source three primary colors LED light source or tricolor laser light source, its light-emitting area of led light source is less than 15*12MM, luminosity is greater than 140Lm/W, and LASER Light Source is diameter 14-20mm at distance luminotron the place ahead 4 centimeters facula areas.
9. single system timesharing as claimed in claim 1 projector is characterized in that single system timesharing projector is characterized in that, described imaging system comprises resolution 1024*768 or the above monochromatic LCD liquid crystal board of monolithic.
10. single system timesharing as claimed in claim 1 projector, it is characterized in that, single system timesharing projector, it is characterized in that, also comprise the sequential sync control device in the described imaging system, it is synchronous that this sequential sync control device is used to control the tristimulus image sequential that shows on the sequence of light of described three primary light source and the described imaging system.
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| CN102520575A (en) * | 2011-12-30 | 2012-06-27 | 中国科学技术大学 | Three-dimensional projection display system based on liquid crystal polarization rotation |
| CN108333857A (en) * | 2016-06-30 | 2018-07-27 | 海信集团有限公司 | Projection light source drive control circuit |
| CN110262169A (en) * | 2019-07-20 | 2019-09-20 | 兴光谱科技成都有限公司 | A kind of New type LCD projector |
| CN113242414A (en) * | 2020-12-17 | 2021-08-10 | 江西视鼎科技有限公司 | Novel mechanism for projection system based on color liquid crystal screen image processing chip and use and application method thereof |
| CN114630092A (en) * | 2022-03-15 | 2022-06-14 | 深圳市大兴业源科技有限公司 | Method and system for improving brightness of single-chip LCD projector |
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| CN114630092A (en) * | 2022-03-15 | 2022-06-14 | 深圳市大兴业源科技有限公司 | Method and system for improving brightness of single-chip LCD projector |
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