CN100443955C - Non-coherent light all spectrum field modulation technology and video projector - Google Patents
Non-coherent light all spectrum field modulation technology and video projector Download PDFInfo
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- CN100443955C CN100443955C CNB021019886A CN02101988A CN100443955C CN 100443955 C CN100443955 C CN 100443955C CN B021019886 A CNB021019886 A CN B021019886A CN 02101988 A CN02101988 A CN 02101988A CN 100443955 C CN100443955 C CN 100443955C
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Abstract
The present invention relates to a non-coherent light all spectrum field modulation technology and a video projector thereof, which belongs to the field of applied optics. A non-coherent light all spectrum field modulation (TMP: True Color Micro-mirror picture) mode is a unique technology of truly realizing spectrum toning, has a capability of representing any true colors, and has optical efficiency with the potential increasing more than 10 times. The all-round properties can greatly exceed the existing trade levels ((LCOS / LCD / DLP lasers) and can be widely applied to a projecting video field.
Description
Technical field
The invention belongs to optical field, definite saying is a kind of incoherent light to be realized the regulate and control method of the brightness of video rate response and tone and with the made video-projection ray machine of the method.
Background technology
The representative of present advanced shadow casting technique is LCOS and DLP ray machine, and the cost of the timesharing of single chip mode is that optical efficiency is lost at least 70%.Be that monolithic or three its colour mixture principles all are the same.The spectral width of the R that chooses, G, B is narrow more, and R, B just more can mix and approach real colour gamut the closer to the petiolarea of spectrum (visible light).But in fact people have to compromise on effect and efficient, the reason of Here it is such shadow casting technique is difficult to show realistic colour.
Summary of the invention
Purpose of the present invention just is to solve the weak point of prior art, adopt and realize the full spectral domain modulation technique of incoherent light (TMP:True Color Micro-mirror Picture), replace the color separation technology in the existing ray machine, produce the ray machine of performance well beyond whole industry level, optical efficiency has the potentiality (splendid white peak performance is arranged) that improve more than 10 times, and color reducibility obtains the improvement of matter.Owing to adopt the mechanical scanning mode, thereby thin portion image quality is also better, can be widely used in the projection video field.
Outstanding feature of the present invention is; As brightness and the colourity modulation of palette, when raising the efficiency greatly, has the ability of any realistic colour of performance with DMD (or LCD/LCOS) with dutycycle control methods realization vision signal.Concretely: under the display mode of same 256 grades of gray scales, (proofread and correct) and can realize than 256 through color correction mode
3The color number of look many several magnitude, thereby can obtain more approaching true color.
Key problem in technology of the present invention is: the main composition of this technology: light source (comprising parabolic reflector), optical fiber collimator, diffraction grating or prism, DMD palette, boundling lens combination, diaphragm, mechanical scanning system, projection objective, DMD driving circuit, its principle of work are: by panchromatic light that light source sent by the optical fiber collimator collimation after again behind boundling, by diaphragm elimination veiling glare, project on the diffraction grating (or prism) again; Be extended to a full color spectrum, this spectrum is projected on the DMD palette, after brightness and tone adjustment signal being sent on the control circuit of DMD palette, the state that turns to and keep of each micro mirror on the DMD palette is with Be Controlled, the proportionate relationship Be Controlled of the upset on the zones of different, the light of different wave length enters the amount of optical channel with Be Controlled, and the stack result of the light of the reflection on the DMD palette will be modulated into different brightness and colourity; Thereby enter the catoptrical brightness of effective optical path passage and tone through DMD palette reflection with modulated and obtain brightness consistent and colourity with vision signal; Again through collimation, focus on the focal plane by projection objective again after finishing scanning by mechanical scanning system behind the boundling; Used diffraction grating (or prism) to make mixed light (white light of band certain color temperature) be launched into spectrum in the method; And project on the DMD palette, use the optical fiber collimator light beam that collimates; Distributed dutycycle control methods with brightness and colourity are controlled the DMD palette; Collimate again with the reflected light of optical fiber collimator to the DMD palette; Behind boundling, obtain one and directly show the colourity of vision signal and the tiny light beam of brightness.This upset proportionate relationship (dutycycle) is a two-dimensional function, and argument of function is the planimetric position coordinate of DMD micro mirror, and the colour temperature correction of the true colour of the brightness of a certain instantaneous vision signal, colourity and present technique special use is depended in the acquisition of this function.
Above-mentioned diffraction grating is reflection grating or projection grating, and the striped of grating can be that straight burr also can be curved grain or closed curve line.
Above-mentioned optical fiber collimator directly is made up of through different light transmitting fiber a branch of two ends, the bigger end bundle of the diameter of each bar optical fiber wire together, the less other end of diameter is also restrainted together, formed fibre-optic bundle directly little through a big other end is covered with the medium of one deck refractive index less than optical fiber wire on the surface of optical fiber wire.
The distributed dutycycle regulation and control of the brightness of the vision signal of above-mentioned DMD palette and colourity are meant: the spectrum that shines on the DMD is full color spectrum (white-light spectrum), the illumination of different frequency is mapped on the different zone on the DMD, the proportionate relationship that micro mirror turns to and keeps on the zone of last each color of light of control DMD just can be controlled light path output mixed color of light and brightness.
On the DMD wafer in present technique and the ray machine the generation type of the spectrum that throwed can form continuous spectrum by grating and prism; Also can be independently red, blue by three, formed colour bar on the zones of different that green light source shines the DMD wafer simultaneously.
Description of drawings
Full spectral domain modulation technique of [figure one] incoherent light and ray machine light path principle synoptic diagram.
The full spectral domain modulation system of [figure two] DMD diagrammatic sketch.
[figure three] light transmitting fiber collimator structure diagrammatic sketch.
Embodiment
The invention will be further described with regard to preferred embodiment of the present invention below in conjunction with accompanying drawing:
Shown in [figure one], basic composition is of this light path: reach (7), scanning galvanometer (9), projection objective (11), DMD driving circuit (17) etc. and form by light source (2), optical fiber collimator (10) and (20), diffraction grating (or prism) (3), DMD modulation/palette (1), boundling lens combination (4) and (5), diaphragm (6); Its this course of work is: the white light that is sent by light source (2) is collimated by optical fiber collimator (20) and throws mirror group (4) by boundling again after (effect of collimation be a branch of light with the original angle of divergence big (depth of parallelism is poor) become the angle of divergence little (depth of parallelism is good)) and carry out boundling, behind diaphragm (6) elimination veiling glare, project and be extended to a full color spectrum (a branch of light of separating by the difference of light wavelength after diffraction grating (or prism) (3) is gone up, when projecting it on screen, just formed the colored ribbon that arranges by color) be launched into different zones, this spectrum is projected DMD modulation/palette (1) go up (also will form the colored ribbon that arranges by color---spectrum).
After brightness/tone adjustment signal sent into the extraction electrode of DMD palette (5), the rollover states of each micro mirror on the DMD palette (5) is with Be Controlled, the proportionate relationship Be Controlled of the upset on the zones of different (local dutycycle), enter the catoptrical brightness of effective optical path passage and tone with modulated (so image be called palette), again behind collimating apparatus (10) collimation, boundling lens combination (5) boundling, by mechanical scanning system---galvanometer (9) is finished scanning, focuses on the focal plane by projection objective (11) again.
The reversal rate that the necessary and sufficient condition of the practicability of this system will limit two important indicator: DMD is less than 10
-1Microsecond; The collimation of (final stage) optical fiber collimator (10) is less than 10
-2Degree, the former---TI (U.S.) realizes substantially; The latter has only this paper collimating apparatus just can reach.(auspicious seeing for details [figure two], [figure three] illustrate)
Shown in [figure two]: the structure of DMD palette (1) is formed (being used for DLP projection ray machine (American TI Company technology) at present in a large number) by little (reflective) mirror in a large number, these catoptrons can independently be driven circuit (2) and drive, micro mirror turns to and the proportionate relationship and the position distribution that keep all can be driven by driving circuit (2), for different light path design, turn to and hold mode all might be that this micro mirror reflexes to reflection ray in the useful luminous flux road.The response time of DMD is about 10 at present
-1The order of magnitude of microsecond, flip angle be+/-12 °, and A/F is about the 1-2 micron.In the technology of the present invention, will need 10
-2The speed of microsecond (can show high-definition signal), but other index then can weaken will be made (flip angle is kept to+and/-3 °, A/F is inessential, the size of micro mirror is also inessential, number of pixels several ten thousand just can: this just means will save the distance that reduce again simultaneously more flip-flop transition between the mover electrode plate, area and the width that increases mover electrode; Consequently increase the pole plate electric charge greatly and simultaneously reduced distance again, dynamic performance will improve greatly, and its technology and difficulty only need the level of the seventies far below the manufacture level of present DMD! ) to reach this speed not difficult!
When the white-light spectrum in [figure two] shines on the DMD micro mirror array, the light of different frequency will be fallen on the different zones, curve among the figure then is Wavelength distribution and the relative intensity (scope of visible range light wave is to 7600 dusts from 4000 dusts) that representative is distributed in the spectrum (bar shaped spectrum) on the DMD palette (1), control DMD palette (1) is gone up the proportionate relationship that the micro mirror on each SPECTRAL REGION turns to and keeps, and just can control the mixed colour brightness of light path output light.(3) be the extraction electrode cable of DMD palette (1), it is controlling the upset of each micro mirror.
Shown in [figure three]: the pectination light guide collimators is made up of many light transmitting fibers, the area (10) of two end faces of the tight mutually contact in the side of each fiber and each root fiber, (11) one big one little, one end of the larger sectional area of fiber is arranged in a side (12), the long-pending other end (13) of small cross sections is arranged in opposite side, formed light transmitting fiber collimating apparatus is an important actor, the area of two bottom surfaces of important actor does not wait, fibre-optic two end faces of each root have all constituted two bottom surfaces of this important actor (12), (13) a part, the end face of larger sectional area (10) is positioned on the important actor larger area bottom surface (12), the end face of larger sectional area (11) is positioned on the important actor larger area bottom surface (13), the side of important actor (15) is the part of the conical surface, promptly the positive cone face also can the positive conical surface of right and wrong, be covered with one or more layers dielectric layer (16) every fibre-optic side, the refractive index of that dielectric layer (16) material on the most close light transmitting fiber surface is greater than the refractive index of light transmitting fiber material.Described light transmitting fiber, layer and bonding (or thermosol material) are category of glass inorganic material or high score subclass organic material.
Its principle of work is: after the bigger light beam of scattering angle (20) is entered by less table top (13) one ends of light transmitting fiber collimating apparatus (important actor shape) area, light will constantly reflect on the side of each root optical fiber wire, obvious light whenever is reflected once, the angle of the axis of itself and optical fiber wire will reduce to some extent, after repeatedly reflecting, axis will be approached in its direction of propagation, and fibre-optic axis is parallel with its center line (22) basically at the two ends of light transmitting fiber collimating apparatus, thereby when the outgoing of another bottom surface (13), collimation will make moderate progress.
Two bottom surfaces (12) of this important actor, (13) are shapes such as circle, polygon, bent limit polygon, and the shape of two bottom surfaces is similar figures or non-similar figures.The cross sectional shape of the optical fiber wire in the light transmitting fiber collimating apparatus can be circle, bent limit hexagon, regular hexagon etc.
(optical fiber bore 10 under present state of arts
-2The thermosol drawing process of mm), can reach 10
-2The degree collimation order of magnitude.
Claims (10)
1, the full spectral domain modulator approach of a kind of incoherent light, by light source, optical fiber collimator, diffraction grating or prism, digital micro-mirror device DMD palette is formed, its principle of work is: by the golden light that light source sent is that white light is collimated by optical fiber collimator, behind boundling, projects on diffraction grating or the prism again; Diffracted grating of light beam or prism are launched into a spectrum, this spectrum projects on the DMD palette, when driving the DMD palette with the video adjustment signal, whether each micro mirror on the DMD overturns Be Controlled, like this, the light of different wave length enters the amount of optical channel with Be Controlled, and it will be brightness and the colourity of representing vision signal that the optical superposition of each the micro mirror usable reflection on the DMD palette is collected on the point together; Its feature just is: this modulator approach has been used diffraction grating or prism to make mixed light promptly be launched into spectrum with the white light of certain color temperature or red, blue, green three primary colours light has been converged on the same DMD wafer simultaneously; Use the optical fiber collimator light beam that collimates; Drive each little reflective mirror on the DMD palette with distributed dutycycle control methods; The usable reflection light boundling that the little reflective mirror of DMD is all can obtain one and directly show the colourity of vision signal and the tiny light beam of brightness.
2, the full spectral domain modulator approach of incoherent light as claimed in claim 1, it is characterized in that: diffraction grating is reflection grating or transmission grating, the striped of grating is straight burr or curved grain.
3, the full spectral domain modulator approach of incoherent light as claimed in claim 2, it is characterized in that the accurate collimating apparatus of optical fiber is made up of a branch of two ends different light transmitting fiber of diameter, the bigger end bundle of the diameter of each bar optical fiber wire together, the less other end of diameter is also restrainted together, big other end of the diameter of formed fibre-optic bundle is little, is covered with the medium of one deck refractive index less than the internal layer optical fiber wire on the surface of optical fiber wire.
4, the full spectral domain modulator approach of incoherent light as claimed in claim 3, it is characterized in that described distributed dutycycle control methods are meant: the spectrum that shines on the DMD is full color spectrum, the light of different frequency will be mapped on the different zone on the DMD, control DMD goes up by the upset proportionate relationship of the micro mirror on the zones of different that light shone of different colours, just can control light path output mixed color of light and brightness; This upset proportionate relationship is a two-dimensional function, and argument of function is the planimetric position coordinate of DMD micro mirror.
5, method as claimed in claim 4 is characterized in that the generation type of spectrum forms continuous spectrum by grating and prism; Or formed colour bar on the zones of different independently red, blue by three, that green light source shines the DMD wafer simultaneously.
6, a kind of video-projection ray machine that uses the full spectral domain modulator approach of incoherent light, its light path system is made up of light source, optical fiber collimator, diffraction grating or prism, digital micro-mirror device DMD palette, boundling lens combination, diaphragm, mechanical scanning system, projection objective, DMD driving circuit; Its course of work is: carry out boundling again after being collimated by optical fiber collimator by the white light that light source sent, behind diaphragm elimination veiling glare, project on diffraction grating or the prism, be extended to a full color spectrum, this spectrum is projected on the DMD palette, after brightness and tone adjustment signal being sent on the control circuit of DMD palette, each micro mirror on the DMD palette turn to and hold mode with Be Controlled, the proportionate relationship Be Controlled of the upset on the zones of different, entering the catoptrical brightness of effective optical path passage and tone through DMD palette reflection will be modulated and brightness and colourity that acquisition is consistent with vision signal; Again through collimation, focus on the focal plane by projection objective again after finishing scanning by mechanical scanning system behind the boundling; Its feature just is, has used diffraction grating or prism in ray machine, is used for making the white light that mixes the light belt certain color temperature to be launched into spectrum; Use the optical fiber collimator light beam that collimates; Drive each little reflective mirror on the DMD palette with distributed dutycycle control methods, control its upset, after the reflected light that will enter the effective optical path passage through DMD palette reflection is used the optical fiber collimating device collimation once more, finish scanning by mechanical scanning system, focus on the focal plane by projection objective again.
7, video-projection ray machine as claimed in claim 6 is characterized in that diffraction grating is reflection grating or transmission grating, and the striped of grating is straight burr or curved grain.
8, video-projection ray machine as claimed in claim 6, it is characterized in that the accurate collimating apparatus of optical fiber is made up of a branch of two ends different light transmitting fiber of diameter, the bigger end bundle of the diameter of each bar optical fiber wire together, the less other end of diameter is also restrainted together, big other end of the diameter of formed fibre-optic bundle is little, is covered with the medium of one deck refractive index less than the internal layer optical fiber wire on the surface of optical fiber wire.
9, video-projection ray machine as claimed in claim 6, it is characterized in that described distributed dutycycle control methods are meant: the spectrum that shines on the DMD is full color spectrum, the light of different frequency will be mapped on the different zone on the DMD, control DMD goes up by the upset proportionate relationship of the micro mirror on the zones of different that light shone of different colours, just can control light path output mixed color of light and brightness; This upset proportionate relationship is a two-dimensional function, and argument of function is the planimetric position coordinate of DMD micro mirror.
10, video-projection ray machine as claimed in claim 9 is characterized in that the generation type of spectrum forms continuous spectrum by grating and prism; Or formed colour bar on the zones of different independently red, blue by three, that green light source shines the DMD wafer simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021019886A CN100443955C (en) | 2002-01-23 | 2002-01-23 | Non-coherent light all spectrum field modulation technology and video projector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021019886A CN100443955C (en) | 2002-01-23 | 2002-01-23 | Non-coherent light all spectrum field modulation technology and video projector |
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| Publication Number | Publication Date |
|---|---|
| CN1434321A CN1434321A (en) | 2003-08-06 |
| CN100443955C true CN100443955C (en) | 2008-12-17 |
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| CNB021019886A Expired - Fee Related CN100443955C (en) | 2002-01-23 | 2002-01-23 | Non-coherent light all spectrum field modulation technology and video projector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5130633B2 (en) * | 2006-03-02 | 2013-01-30 | ソニー株式会社 | Image display device and image display device |
| CN108803203B (en) * | 2018-06-28 | 2021-03-30 | 深圳大学 | Method for realizing color projection display, display system and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047951A (en) * | 1989-06-07 | 1990-12-19 | 菲利浦光灯制造公司 | The modulating system of projection kinescope |
| US5706061A (en) * | 1995-03-31 | 1998-01-06 | Texas Instruments Incorporated | Spatial light image display system with synchronized and modulated light source |
| CN1188249A (en) * | 1996-10-31 | 1998-07-22 | 索尼公司 | Image projecting apparatus |
| JP2000137191A (en) * | 1998-11-04 | 2000-05-16 | Ibm Japan Ltd | Single plate type color projector |
| CN1273641A (en) * | 1998-06-05 | 2000-11-15 | 精工爱普生股份株式会社 | Light source and display device |
-
2002
- 2002-01-23 CN CNB021019886A patent/CN100443955C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047951A (en) * | 1989-06-07 | 1990-12-19 | 菲利浦光灯制造公司 | The modulating system of projection kinescope |
| US5706061A (en) * | 1995-03-31 | 1998-01-06 | Texas Instruments Incorporated | Spatial light image display system with synchronized and modulated light source |
| CN1188249A (en) * | 1996-10-31 | 1998-07-22 | 索尼公司 | Image projecting apparatus |
| CN1273641A (en) * | 1998-06-05 | 2000-11-15 | 精工爱普生股份株式会社 | Light source and display device |
| JP2000137191A (en) * | 1998-11-04 | 2000-05-16 | Ibm Japan Ltd | Single plate type color projector |
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| CN1434321A (en) | 2003-08-06 |
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