CN101295123A - Display system based on blazed grating photomodulator - Google Patents
Display system based on blazed grating photomodulator Download PDFInfo
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- CN101295123A CN101295123A CNA2007100987371A CN200710098737A CN101295123A CN 101295123 A CN101295123 A CN 101295123A CN A2007100987371 A CNA2007100987371 A CN A2007100987371A CN 200710098737 A CN200710098737 A CN 200710098737A CN 101295123 A CN101295123 A CN 101295123A
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Abstract
The invention discloses a display system based on a blazed grating light modulator, which comprises a light source (10), an illuminating lens device (11) arranged on a path of rays at the light emission port of the light source and used for reshaping light beams and shimming, the blazed grating light modulator (12) arranged on the output path of rays of the illuminating lens device (11) and used for reflecting the light beams and a projection lens device (13) arranged on the reflection path of rays of the blazed grating light modulator (12), and the emergent light of the projection lens device (13) is launched onto a projection screen (14). The display system of the invention has high utilization rate of the light source, higher brightness and higher resolution factor, and the diffraction efficiency of work, namely, the utilization rate of luminous energy can achieve above 90 percent.
Description
Technical field
The present invention relates to a kind of display device, particularly relate to a kind of display system based on the blazed grating photomodulator of controlling by MEMS (micro electro mechanical system) (Micro-Electrical-Mechanical System is called for short MEMS).
Background technology
Existing display technique can be divided into active illuminating and passive luminous two big classes.
The active illuminating display technique comprises cathode ray tube (CRT), PDP display (PDP), surface conductive emission (SED), carbon nano-tube field emission (CNT) and organic electroluminescent LED (OLED) etc.; Passive luminous display technique comprises liquid crystal display (LCD), liquid crystal on silicon demonstration (LCOS), Digital Micromirror Device demonstration (DMD), interferes and regulate iMoD (Interfer-Omitric-Modulation Device is called for short iMoD) demonstration and grating light valve (GLV) demonstration etc.Wherein, in passive luminous display technique, LCOS can lose 50% energy of light source by the polarisation effect demonstration of liquid crystal, and light utilization efficiency is not high, and the manufacturing process complexity.It is colored that the iMoD display technique utilizes principle of interference to produce, but the brightness and contrast of picture is enough to produce bigger projection image far from.DLP is one of the most successful digital display technique, is applicable to movie theatre and rear-projection TV, but owing to adopt UHP (ultrahigh pressure mercury lamp), xenon lamp etc. as light source, its beam split and close a large amount of losses that photosystem causes luminous energy, and the efficiency of light energy utilization only is 20%～30%.GLV is based on the unique successful color display technology of diffraction principle, has higher light utilization efficiency, adopt LASER Light Source can produce the large screen projection image, but during the diffraction grating generation diffraction of this ordinary construction, because 0 grade diffraction light occupies most energy of diffraction light, therefore, utilizing the highest theoretical diffraction efficiency that GLV had of 1 grade diffraction light generation picture only is 40.5%.
Therefore just need the display system that a kind of light source utilization factor is higher, brightness is higher and resolution is higher.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the display system based on blazed grating photomodulator that a kind of light source utilization factor is higher, brightness is higher and resolution is higher is provided.
In order to achieve the above object, the present invention takes following technical scheme.
A kind of display system based on blazed grating photomodulator comprises light source; What be provided with on the light path at the light-emitting window place of described light source is used for illuminating lens device (11) to beam shaping, shimming, what be provided with on the output light path of described illuminating lens device (11) is used for blazed grating photomodulator (12) with beam reflection, a projecting lens apparatus (13) that is provided with on the reflected light path of described blazed grating photomodulator (12), the emergent light of projecting lens apparatus (13) incides on the projection screen (14).
In technique scheme, further, described light source (10) comprises three monochromatic sources, is respectively red (Red is called for short R) light source, green (Green is called for short G) light source and blueness (Blue is called for short B) light source; Described redness, green, blue-light source form white light by beam merging apparatus and export from described light source; Described beam merging apparatus comprises prism beam merging apparatus and optical fiber coupling bundle beam merging apparatus; Described blazed grating photomodulator (12) is a face battle array blazed grating photomodulator, each pixel cell of blazed grating has three blazing angles that correspond respectively to red, green, blue, and described blazed grating photomodulator (12) is controlled each pixel cell timesharing change blazing angle and is used for showing according to red, green, blue look circulation modulation.
In technique scheme, further, described light source (10) comprises three monochromatic sources, is respectively red light source, green light source and blue-light source; Described redness, green, blue-light source combination form white light by beam merging apparatus and export from described light source; Described beam merging apparatus comprises prism beam merging apparatus and optical fiber coupling bundle beam merging apparatus; Described blazed grating photomodulator (12) is a face battle array blazed grating photomodulator; The pixel cell of each blazed grating is made of three sub-pixels, three sub-pixels have a blazing angle separately, be respectively the blazing angle corresponding to red, green, blue, three sub-pixels that described blazed grating photomodulator (12) is controlled each pixel cell change its blazing angle and keep the time of blazing angle to be used to export needed brightness.
In technique scheme, further, described light source (10) comprises three monochromatic sources, is respectively red light source, green light source and blue-light source; Described blazed grating photomodulator (12) comprises three independently face battle array blazed grating photomodulator compositions, is respectively first, second, third battle array blazed grating photomodulator; Described illuminating lens device comprises three illuminating lens unit, is respectively first, second, third illuminating lens unit; The light beam that described redness, green, blue-light source send respectively through on the light path separately be used for first, second, third illuminating lens unit to beam shaping, shimming after, incide respectively and enter one after being reflected on described first, second, third battle array blazed grating photomodulator and be used for the RGB three-beam is synthesized a branch of look device (30) that closes, this closes the input end part that the look device is arranged on described projecting lens apparatus (13); Each pixel of described first battle array blazed grating photomodulator has the blazing angle corresponding to ruddiness, each pixel of described second battle array blazed grating photomodulator has the blazing angle corresponding to green glow, and each pixel of described the 3rd battle array blazed grating photomodulator has the blazing angle corresponding to blue light.
In technique scheme, further, described light source (10) comprises three monochromatic sources, is respectively red light source, green light source and blue-light source; Described redness, green, blue-light source form white light by beam merging apparatus and export from described light source; Described beam merging apparatus comprises prism beam merging apparatus and optical fiber coupling bundle beam merging apparatus; Described blazed grating photomodulator (12) is the linear array blazed grating photomodulator, the pixel cell of each blazed grating has three blazing angles that correspond respectively to red, green, blue, and described blazed grating photomodulator (12) is controlled each pixel cell timesharing change blazing angle and is used for showing according to red, green, blue circulation modulation; Also comprise a galvanometer (15) that is positioned between described projecting lens apparatus (13) and the described projection screen (14), be used for the light that projecting lens apparatus (13) sends is reflexed to described projection screen (14); Described linear array blazed grating photomodulator and described galvanometer coordination are to realize scanning imagery on described projection screen.
In technique scheme, further, described light source (10) comprises three monochromatic sources, is respectively red light source, green light source and blue-light source; Described redness, green, blue-light source form white light by beam merging apparatus and export from described light source; Described beam merging apparatus comprises prism beam merging apparatus and optical fiber coupling bundle beam merging apparatus; Described blazed grating photomodulator (12) is the linear array blazed grating photomodulator; The pixel cell of each blazed grating is made of three sub-pixels, three sub-pixels have a blazing angle corresponding to red, green, blue respectively, and three sub-pixels that described blazed grating photomodulator (12) is controlled each pixel cell change its blazing angle and keep the time of blazing angle to be used to export needed brightness; Also comprise a galvanometer that can rotate (15) that is positioned between described projecting lens apparatus (13) and the described projection screen (14), be used for the light that projecting lens apparatus (13) sends is reflexed to described projection screen (14); Described linear array blazed grating photomodulator and described galvanometer coordination realize scanning imagery to go up at described projection screen (14).
In technique scheme, further, described light source (10) comprises three monochromatic sources, is respectively red light source, green light source and blue-light source; Described blazed grating photomodulator (12) comprises three linear array blazed grating photomodulators, is respectively first, second, third linear array blazed grating photomodulator; Described illuminating lens device comprises three illuminating lens unit, is respectively first, second, third illuminating lens unit; The light beam that described redness, green, blue-light source send respectively through on the light path separately be used for first, second, third illuminating lens unit to beam shaping, shimming after, incide respectively and enter one after being reflected on the described first, second, third linear array blazed grating photomodulator and be used for the RGB three-beam is synthesized a branch of look device (30) that closes, this closes the input end part that the look device is arranged on described projecting lens apparatus (13); Each pixel of described first battle array blazed grating photomodulator has a blazing angle corresponding to ruddiness, each pixel of described second battle array blazed grating photomodulator has the blazing angle corresponding to green glow, and each pixel of described the 3rd battle array blazed grating photomodulator has the blazing angle corresponding to blue light; Also comprise a galvanometer that can rotate (15) that is positioned between described projecting lens apparatus (13) and the described projection screen (14), be used for the light that projecting lens apparatus (13) sends is reflexed to described projection screen (14); Described first, second, third linear array blazed grating photomodulator and described galvanometer coordination are to realize scanning imagery on described projection screen.
In technique scheme, further, described blazed grating photomodulator has a MEMS (micro electro mechanical system) that is used to control blazing angle.
In technique scheme, further, described light source comprises red, green or blue mono-colour laser, red, green or blue monochromatic LED (light emitting diode) device.
Compared with prior art, superiority of the present invention is:
Traditional raster is owing to interfere factor principal maximum overlapping between the unit diffraction factor and unit, thus luminous energy disperse in the spectrum at different levels, and adopt the diffraction principle of blazed grating that luminous energy is focused on certain grade of required spectrum, thereby improve the collection efficiency of luminous energy.The big I of the blazing angle θ of the blazed grating based on MEMS (micro electro mechanical system) (MEMS) of the present invention is controlled by MEMS, change the blazing angle θ of grating, make 0 grade of grating diffration and interfere 0 grade and separate, thereby luminous energy is shifted respectively and focus on the required spectral order time, make display system light source utilization factor height, brightness is higher and resolution is higher, the diffraction efficiency of work is that the efficiency of light energy utilization can reach more than 90%, work in digital line scanner uni surface imaging mode, be applicable to that one-wavelength laser or monochromatic LED (light emitting diode) are as light source.
Description of drawings
Fig. 1 is based on the display system schematics of linear array MEMS blazed grating;
Fig. 2 is based on the display system schematics of face battle array MEMS blazed grating;
Fig. 3 is based on the display system schematics of the face battle array MEMS blazed grating with a blazing angle;
Fig. 4 is the linear array blazed grating pixel Pareto diagram that each pixel has three sub-pixels;
Fig. 5 is the pixel diagrammatic cross-section that each pixel has the linear array blazed grating of three blazing angles;
Fig. 6 is the working light path figure that each pixel has the linear array blazed grating pixel of three blazing angles;
Fig. 7 is the pixel diagrammatic cross-section that each pixel has the face battle array blazed grating of a blazing angle;
Fig. 8 is face battle array (or linear array) the blazed grating pixel working light path figure that each pixel has a blazing angle.
The drawing explanation:
The 10-light source; 11---illuminating lens device;
The 12---blazed grating photomodulator; The 13---projecting lens apparatus;
The 14---projection screen; The 15---galvanometer;
The 30----Multiplexing apparatus.
The 101---red light source; The 102---green light source; The 103---blue-light source;
The 111-first illuminating lens unit; The 112-second illuminating lens unit; 113-the 3rd illuminating lens unit;
First battle array blazed grating photomodulator of 121-; Second battle array blazed grating photomodulator of 122-; The 3rd battle array blazed grating photomodulator of 123-;
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Blazed grating among the present invention is an example with the plane reflection grating mainly, angle theta between groove face and the grating face is called blazing angle, size based on the blazing angle θ of the blazed grating of MEMS (micro electro mechanical system) (MEMS) is to be controlled by MEMS, change the blazing angle θ of grating, make 0 grade of grating diffration and interfere 0 grade and separate, thus luminous energy is shifted respectively and focus on required spectral order inferior on.When shining rotating blazed grating with monochromatic source, change the blazing angle θ of grating, light beam is glittered on specific direction, turn to the generation RGB three primary colours and the dark locational residence time of attitude with pulse width modulation mode control blazed grating photomodulator pixel, can make the pairing three kinds of colors of each pixel have different brightness.Utilize the persistence of vision phenomenon of human eye, the combination by the different brightness of pixel, different base colors just can produce the various colours that pixel is required, a plurality of pixels are formed array, such as formation face battle array, can constitute display frame, perhaps form linear array, can constitute display frame by projection scanning.
As shown in Figure 1, realize the display system based on linear array MEMS blazed grating photomodulator of the present invention, specifically comprise: light source 10; Being provided with one on the light path at the light-emitting window place of described light source 10 is used for beam shaping, shimming illuminating lens 11, one blazed grating photomodulator 12 that is used for beam reflection is set on the output light path of described illuminating lens group 11, one projecting lens apparatus 13 is set on the reflected light path of described blazed grating photomodulator 12, and the place ahead of projecting lens apparatus 13 output terminals is provided with a projection screen 14.Blazed grating photomodulator 12 is the linear array blazed grating photomodulator, this system also comprise one can quick rotation battle array mirror 15 between projecting lens apparatus 13 and projection screen 14, battle array mirror 15 reflexes to the light of projecting lens apparatus 13 outgoing on the projection screen 14.
The working method of each pixel cell as shown in Figure 6, direction 8 is projecting direction (being the direction of light outgoing), and white light 6 (being the direction of light incident) is perpendicular to 5 incidents of grating face, when blazed grating in the position 4 places, light returns along former road, projecting direction 8 places according to the wavelength of three primary colours, design the blazing angle of grating corresponding to details in a play not acted out on stage, but told through dialogues at this moment, make the grating micro mirror under the control of MEMS, forward position 1 to, during 2,3 places, direction 8 places corresponding respectively the bright field that blazing angle produced of red, green, blue three looks.Each pixel cell is made up of single grating as shown in Figure 6, to the residence time that produces on red, green, blue three primary colours and dark four fixed positions of attitude, makes single pixel have different colors and brightness with pulse width modulation mode control blazed grating unit rotational.A plurality of pixels are formed array, are linear array blazed grating pixel sectional view as shown in Figure 5.
Linear array blazed grating photomodulator 12 and galvanometer 15 coordinations are to realize scanning imagery on described projection screen.Each blazed grating pixel cell timesharing changes blazing angle, shows that according to three kinds of coloured light of red, green, blue the time scale modulation that circulates successively shows, its time ratio colour temperature of white light that light source is joined when showing determines.MEMS controls described battle array blazed grating pixel blazing angle by PWM (pulse-length modulation) mode and turns to and produce respectively the red, green, blue colour field and the dark locational residence time of attitude, makes the pairing three kinds of colors of each pixel have different brightness.During this system works, one row of the corresponding shown image of linear array photomodulator, when showing, row finish, the galvanometer control bundle arrives the position of next column image, so circulation has shown a width of cloth monochrome image (such as red image) until scanning, show blue image and green image then successively, because human eye is worked as the persistence of vision phenomenon, the observer will see the complete image of working as of a width of cloth color.
On the basis of embodiment 1, as different from Example 1:
As shown in Figure 8, each sub-pixel has only a blazing angle, and direction 8 is the light exit direction of blazed grating for projecting direction, monochromatic light 6 is perpendicular to 5 incidents of grating face, when the blazed grating pixel cell was positioned at position 2, light returned by former road, and this moment, projecting direction 8 was in details in a play not acted out on stage, but told through dialogues; When the blazed grating pixel cell is positioned at position 1, projecting direction 8 is in bright field, control the time of each sub-pixel of linear array blazed grating in bright field and details in a play not acted out on stage, but told through dialogues stop by PWM (pulse-length modulation) mode, make the pairing three kinds of colors of each subpixel have different brightness, thereby form different colors; Wherein the angle of position 1 and position 2 is corresponding monochromatic blazing angle, the blazing angle of three the corresponding separately red, green, blue coloured light of sub-pixel needs of work.Fig. 4 is based on the pixel Pareto diagram of linear array blazed grating micro mirror, and a plurality of pixels are lined up a linear array, each pixel 1,2,3 ..., all by three near sub-pixel form, by sub-pixel 1-1,1-2 and 1-3 form such as pixel 1.
Other technical characterictic is with embodiment 1.
As shown in Figure 2, realize display system, specifically comprise: light source 10 based on MEMS face battle array blazed grating photomodulator; Being provided with one on the light path at the light-emitting window place of described light source 10 is used for beam shaping, shimming illuminating lens 11, one blazed grating photomodulator 12 that is used for beam reflection is set on the output light path of described illuminating lens group 11, one projecting lens apparatus 13 is set on the reflected light path of described blazed grating photomodulator 12, and the place ahead of projecting lens apparatus 13 output terminals is provided with a projection screen 14; Blazed grating photomodulator 12 is a face battle array blazed grating photomodulator, each pixel cell of blazed grating has three blazing angles that correspond respectively to red, green, blue, and blazed grating photomodulator 12 each pixel cell timesharing of control change blazing angle is used for showing according to red, green, blue circulation modulation.Light source 10 comprises three kinds of monochromatic sources, is respectively red light source, green light source and blue-light source; Described redness, green, blue-light source cooperate the formation white light to export from light source 10; Illuminating lens device 11 adopts the non-spherical lens combination and passes through the optical wand shimming; The light beam that light source 10 sends is projected in the red, green, blue image that forms the stack of three width of cloth on the display screen 14 through after respectively being used for illuminating lens device 11 back timesharing mating surface battle array blazed grating photomodulators 12 reflections to beam shaping, shimming through projecting lens apparatus 13; According to the work of the sequential time-shared switch of blazed grating photomodulator 12, described timesharing shows that for show the time scale modulation that circulates successively according to three kinds of coloured light of red, green, blue its time ratio is determined by the colour temperature that shows white light that time joins.Control described battle array blazed grating pixel by PWM (pulse-length modulation) mode and turn to and produce respectively the red, green, blue colour field and the dark locational residence time of attitude, make the pairing three kinds of colors of each pixel have different brightness.The projection lens that projecting lens apparatus 13 employings are sold according to the distance and the size employing market of projection screen 14.
Embodiment 4
On the basis of embodiment 3, as different from Example 3:
Other technical characterictic is with embodiment 3.
As shown in Figure 3, realize the display system based on MEMS face battle array blazed grating photomodulator, wherein, light source 10 comprises three monochromatic sources, is respectively red light source 101, green light source 102 and blue-light source 103; Blazed grating photomodulator 12 comprises three independently face battle array blazed grating photomodulator compositions, be respectively first, second, third battle array blazed grating photomodulator 121,122,123, each blazed grating photomodulator has a MEMS (micro electro mechanical system) that is used to control blazing angle; Illuminating lens device 11 comprises three illuminating lens unit, is respectively first, second, third illuminating lens unit 111,112,113; The light beam red, green, that blue-light source 101,102,103 sends respectively through on the light path separately be used for first, second, third illuminating lens unit 111,112,113 to beam shaping, shimming after, incide respectively and enter one after being reflected on described first, second, third battle array blazed grating photomodulator 121,122,123 and be used for the RGB three-beam is synthesized a branch of look device 30 that closes, this closes the input end part that look device 30 is arranged on projecting lens apparatus 13; Each pixel of described first battle array blazed grating photomodulator 121 has a blazing angle corresponding to ruddiness, each pixel of described second battle array blazed grating photomodulator 122 has a blazing angle corresponding to green glow, and each pixel of described the 3rd battle array blazed grating photomodulator 123 has a blazing angle corresponding to blue light; Projection objective device 13 is projected in the red, green, blue image that forms the stack of three width of cloth on the display screen 14; Every kind of coloured light is worked simultaneously from equal angular incident and according to the sequential of blazed grating photomodulator, control described first, second, third battle array blazed grating pixel by PWM (pulse-length modulation) mode and turn to and produce respectively the red, green, blue colour field and the dark locational residence time of attitude, make the pairing three kinds of colors of each pixel have different brightness.
The blazing angle of each pixel and working method are as shown in Figure 8, each pixel has only a blazing angle, direction 8 is the light exit direction of blazed grating for projecting direction, monochromatic light 6 is perpendicular to 5 incidents of grating face, when the blazed grating pixel cell is positioned at position 2, light returns by former road, and this moment, projecting direction 8 was in details in a play not acted out on stage, but told through dialogues; When the blazed grating pixel cell was positioned at position 1, projecting direction 8 was in bright field.Fig. 7 is based on the pixel sectional view of face battle array blazed grating.
The red light source 101 of light source 10, green light source 102 and blue-light source 103 adopt the led light source of red, green, blue monochrome respectively in the present embodiment, first, second, third illuminating lens unit 111,112,113 of illuminating lens device 11 adopts the non-spherical lens combination and passes through the optical wand shimming, projecting lens apparatus 13 adopts according to the distance of projection screen 14 and size and adopts projection lens that sell in market, closes look device 30 and adopts the X-CUBE color-combination prism.
Embodiment 6
On the basis of embodiment 5, as different from Example 5:
Other is with embodiment 5.
It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1, a kind of display system based on blazed grating photomodulator comprises light source (10); What be provided with on the light path at the light-emitting window place of described light source is used for illuminating lens device (11) to beam shaping, shimming, what be provided with on the output light path of described illuminating lens device (11) is used for blazed grating photomodulator (12) with beam reflection, a projecting lens apparatus (13) that is provided with on the reflected light path of described blazed grating photomodulator (12), the emergent light of projecting lens apparatus (13) incides on the projection screen (14).
2, according to the described display system based on blazed grating photomodulator of claim 1, wherein, described light source (10) comprises three monochromatic sources, is respectively red light source, green light source and blue-light source; Described redness, green, blue-light source form white light by beam merging apparatus and export from described light source; Described beam merging apparatus comprises prism beam merging apparatus and optical fiber coupling bundle beam merging apparatus.
3, according to the described display system of claim 2 based on blazed grating photomodulator, wherein, described blazed grating photomodulator (12) is a face battle array blazed grating photomodulator, each pixel cell of blazed grating has three blazing angles that correspond respectively to red, green, blue, and described blazed grating photomodulator (12) is controlled each pixel cell timesharing change blazing angle and is used for showing according to red, green, blue look circulation modulation.
4, according to the described display system based on blazed grating photomodulator of claim 2, wherein, described blazed grating photomodulator (12) is a face battle array blazed grating photomodulator; The pixel cell of each blazed grating is made of three sub-pixels, three sub-pixels have a blazing angle separately, be respectively the blazing angle corresponding to red, green, blue, three sub-pixels that described blazed grating photomodulator (12) is controlled each pixel cell change its blazing angle and keep the time of blazing angle to be used to export needed brightness.
5, according to the described display system based on blazed grating photomodulator of claim 1, wherein, described light source (10) comprises three monochromatic sources, is respectively red light source, green light source and blue-light source; Described blazed grating photomodulator (12) comprises three independently face battle array blazed grating photomodulator compositions, is respectively first, second, third battle array blazed grating photomodulator; Described illuminating lens device comprises three illuminating lens unit, is respectively first, second, third illuminating lens unit; The light beam that described redness, green, blue-light source send respectively through on the light path separately be used for first, second, third illuminating lens unit to beam shaping, shimming after, incide respectively and enter one after being reflected on described first, second, third battle array blazed grating photomodulator and be used for the RGB three-beam is synthesized a branch of look device (30) that closes, this closes the input end part that the look device is arranged on described projecting lens apparatus (13); Each pixel of described first battle array blazed grating photomodulator has the blazing angle corresponding to ruddiness, each pixel of described second battle array blazed grating photomodulator has the blazing angle corresponding to green glow, and each pixel of described the 3rd battle array blazed grating photomodulator has the blazing angle corresponding to blue light.
6, according to the described display system of claim 2 based on blazed grating photomodulator, wherein, described blazed grating photomodulator (12) is the linear array blazed grating photomodulator, the pixel cell of each blazed grating has three blazing angles that correspond respectively to red, green, blue, and described blazed grating photomodulator (12) is controlled each pixel cell timesharing change blazing angle and is used for showing according to red, green, blue circulation modulation; Also comprise a galvanometer (15) that is positioned between described projecting lens apparatus (13) and the described projection screen (14), be used for the light that projecting lens apparatus (13) sends is reflexed to described projection screen (14); Described linear array blazed grating photomodulator and described galvanometer coordination realize scanning imagery to go up at described projection screen (14).
7, according to the described display system based on blazed grating photomodulator of claim 2, wherein, described blazed grating photomodulator (12) is the linear array blazed grating photomodulator; The pixel cell of each blazed grating is made of three sub-pixels, three sub-pixels have a blazing angle corresponding to red, green, blue respectively, and three sub-pixels that described blazed grating photomodulator (12) is controlled each pixel cell change its blazing angle and keep the time of blazing angle to be used to export needed brightness; Also comprise a galvanometer that can rotate (15) that is positioned between described projecting lens apparatus (13) and the described projection screen (14), be used for the light that projecting lens apparatus (13) sends is reflexed to described projection screen (14); Described linear array blazed grating photomodulator and described galvanometer coordination are to realize scanning imagery on described projection screen.
8, according to the described display system based on blazed grating photomodulator of claim 1, wherein, described light source (10) comprises three monochromatic sources, is respectively red light source, green light source and blue-light source; Described blazed grating photomodulator (12) comprises three linear array blazed grating photomodulators, is respectively first, second, third linear array blazed grating photomodulator; Described illuminating lens device comprises three illuminating lens unit, is respectively first, second, third illuminating lens unit; The light beam that described redness, green, blue-light source send respectively through on the light path separately be used for first, second, third illuminating lens unit to beam shaping, shimming after, incide respectively and enter one after being reflected on the described first, second, third linear array blazed grating photomodulator and be used for the RGB three-beam is synthesized a branch of look device (30) that closes, this closes the input end part that the look device is arranged on described projecting lens apparatus (13); Each pixel of described first battle array blazed grating photomodulator has a blazing angle corresponding to ruddiness, each pixel of described second battle array blazed grating photomodulator has the blazing angle corresponding to green glow, and each pixel of described the 3rd battle array blazed grating photomodulator has the blazing angle corresponding to blue light; Also comprise a galvanometer that can rotate (15) that is positioned between described projecting lens apparatus (13) and the described projection screen (14), be used for the light that projecting lens apparatus (13) sends is reflexed to described projection screen (14); Described first, second, third linear array blazed grating photomodulator and described galvanometer coordination are to realize scanning imagery on described projection screen.
9, according to each described display system based on blazed grating photomodulator of claim 1-8, wherein, described blazed grating photomodulator has a MEMS (micro electro mechanical system) that is used to control blazing angle.
10, according to the described display system based on blazed grating photomodulator of claim 9, wherein, described light source comprises red, green or blue mono-colour laser, also comprises red, green or blue single color LED device.
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| CN106597790A (en) * | 2016-12-22 | 2017-04-26 | 深圳市华星光电技术有限公司 | Laser projector display apparatus |
| CN114554123A (en) * | 2014-05-15 | 2022-05-27 | Mtt创新公司 | Optimizing drive schemes for multi-projector systems |
| CN115032853A (en) * | 2022-06-01 | 2022-09-09 | 北京理工大学 | Hyperspectral projector and use method |
| WO2023155450A1 (en) * | 2022-02-21 | 2023-08-24 | 华为技术有限公司 | Projection device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5311360A (en) * | 1992-04-28 | 1994-05-10 | The Board Of Trustees Of The Leland Stanford, Junior University | Method and apparatus for modulating a light beam |
| US6829092B2 (en) * | 2001-08-15 | 2004-12-07 | Silicon Light Machines, Inc. | Blazed grating light valve |
| US6678085B2 (en) * | 2002-06-12 | 2004-01-13 | Eastman Kodak Company | High-contrast display system with scanned conformal grating device |
| US7057819B1 (en) * | 2002-12-17 | 2006-06-06 | Silicon Light Machines Corporation | High contrast tilting ribbon blazed grating |
| JP4403371B2 (en) * | 2003-08-18 | 2010-01-27 | ソニー株式会社 | Blaze diffraction type light modulation device and image display device |
| CN100381863C (en) * | 2005-12-07 | 2008-04-16 | 云南省煤炭供销总公司 | Flash grating digital micro lens display system |
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2007
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114554123A (en) * | 2014-05-15 | 2022-05-27 | Mtt创新公司 | Optimizing drive schemes for multi-projector systems |
| CN106597790A (en) * | 2016-12-22 | 2017-04-26 | 深圳市华星光电技术有限公司 | Laser projector display apparatus |
| WO2023155450A1 (en) * | 2022-02-21 | 2023-08-24 | 华为技术有限公司 | Projection device and method |
| CN115032853A (en) * | 2022-06-01 | 2022-09-09 | 北京理工大学 | Hyperspectral projector and use method |
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| Publication number | Publication date |
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| CN101295123B (en) | 2012-07-25 |
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