CN1947429A - Light engine for frame-sequential color projection display system having monochromatic light sources, system and driving method - Google Patents
Light engine for frame-sequential color projection display system having monochromatic light sources, system and driving method Download PDFInfo
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- CN1947429A CN1947429A CNA2005800078486A CN200580007848A CN1947429A CN 1947429 A CN1947429 A CN 1947429A CN A2005800078486 A CNA2005800078486 A CN A2005800078486A CN 200580007848 A CN200580007848 A CN 200580007848A CN 1947429 A CN1947429 A CN 1947429A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
- H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time
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Abstract
A compact light engine (22) for a frame-sequential color projection display system employs sets of monochromatic light sources (26, 27, 28) such as LEDs. The LED sets are incorporated into compact light input modules (23, 24, 25) which include an array of reflectors (29, 30, 31) as light collectors, one for each LED, and a light coupling element (32, 33, 34) for coupling the collected light to a color combiner (35). The color combiner employs dichroic filters (36, 37) to combine the light of different colors into a beam. The beam's light intensity is homogenized by a homogenizing light guide (38). Increased light output is obtained without sacrificing lifetime by pulse-driving the LEDs at 5 or more times the rated max. DC driving current, at a 1/5 duty ratio.
Description
The present invention relates to frame-sequential color projection displays, relate to the display that uses many groups such as the monochromatic source of light-emitting diode (LEDs) more accurately.
The characteristics of frame-sequential color projection display are to have independent electrical-optical modulating device, for example LCD (LCD) or digital micro-mirror device (DMD), it is by the primary colours subframe with very fast frame speed sequential processes shows signal, producing full color shows, so the observer becomes full color images in conjunction with the primary colours subframe.
The advantage of frame-sequential color projection displays comprises than lower consumption of the color system of multiaspect plate additive color and the resolution higher than single-panel spatial filter color systems.But existing system uses moving-member, for example, utilizes the corresponding informance that shows to carry out synchronous color wheel disc, comes from the monochrome irradiation of wideband light source generation to the primary colours subframe.
If used monochromatic source, can the realizing by electronic switch rather than mechanical device synchronously of color lighting.And illumination power efficiency can be enhanced, because light source can not be closed when having color framing.
United States Patent (USP) 6,224,216 disclose a kind of frame-sequential color projection display of using monochromatic source.Red, green, blue coloured light from light-emitting diode (LED) array is collected, is made up and be directed to single smooth integrator by multiple beams of optical fiber, gives display equipment then and produces the colored demonstration of frame sequence.In alternate embodiment, the fiber bundle of three separation is directed to red, green, blue the display equipment of three separation.Synthesize by x-cube (X-Cube) subsequently by the light after these three display modulation.
Although the general notion of using monochromatic source to shine the frame-sequential color projection displays that does not have moving-member is well-known, but be to use fiber bundle will cause huge configuration as the device of collection, combination and relaying light source, it is difficult to handle and manufacturing costs dearly.
According to the present invention, frame-sequential color projection displays is used compact light engine, and it has small-sized light input module, so that will be input to color scheme and light integrated component from the light of many groups monochromatic source such as LED.
Each light input module comprises small-sized light collection kit, the array of the independent reflector that is associated with independent led chip for example, and comprise and be used for and will couple light to the optical coupling part color scheme parts, independent.The color scheme parts are sent to the light integrator with light, and the light integrator is to carrying out integrated from the light after the combination of input module.The light integrator can be any known type, the lens of lens arra, lenticular lens array or special tectonic for example, wherein the input and output plane respectively approximate location in the focal plane of camera lens.This structure is effective especially to input source such as array.The light integrator can also be at U.S. Patent application S.N.10/161 co-pending, 798 (agent's summary PHUS 020, the homogenizing light pipe of the type 170), this application was submitted on June 4th, 2002, and belonged to identical assignee with the application.
The optical arrangement mode of single sets of monochromatic light sources and electronic control mode allow each light source group at any time to shine the imaging setting with the duration of required any setting, make they can switch in chronological order and with the scan-synchronized of this equipment.Therefore, realized a kind of frame sequence color monitor that does not use the high power efficiency of moving-member, and it has the structure that is easy to make of saving the space.And such frame-sequential color projection displays can merge at an easy rate more than three primary colours and realizes wide colour gamut.
Term used herein " monochrome " comprises true monochromatic source and has quite little FWHM (full-width at half maximum), is preferably 15 to 40nm or littler light source.FWHM is defined in half of maximum intensity value of the centre wavelength of light emitted and highly locates, the width of wavelength crest takes place.And term " monochrome " comprises two or more have same perceived color but the distinguishing slightly light source of their peak wavelength, and for example, the blue LED of emission has the peak wavelength of 455nm and 470nm.From commercial angle, the LED that satisfies these conditions is easy to obtain.
And term " monochrome " comprises the led light source with one or more light-emitting fluophor combinations, and purpose is the light output that strengthens or move this led light source.Typically, excite fluorescence coating, so that launch the light in similar or the different wavelength range at the coating form in the LED outside with the output of the light of LED.
According to one aspect of the present invention, a photo engine that is used for frame-sequential color projection display is provided, it comprises at least two light input modules (this module has the monochromatic source of different color), be used for different color be combined to a light beam color combiner, be used for the light integrator of integrated light beam from color combiner.Except having one group of monochromatic source, each module also has light collecting device and comes to collect light and optical coupling part from this group light source and be used for the color combiner that couples light to that will collect.Preferably, described monochromatic source is the led chip group, and light collecting device is a reflector array, and each reflector is associated with a led chip, perhaps is associated with one group of led chip more than one compact package.
According to a preferred embodiment of the present invention, photo engine comprises three light input modules, and each is used for a primary colours red, green, blue, and color combiner is the x-cube that comprises the dichroic filter of two internal chiasmas.Dichroic filter is provided to the light of source color is sent to the homogenizing light pipe.
Light collecting device is preferably one or more reflection part, but can be chosen as refraction, for example one or more lenticular unit.
Optical coupling unit is preferably on June 4th, 2002 and submits to, and belongs to same assignee's U.S. Patent application S.N.10/161 co-pending with the application, the light pipe of type described in 798 (the agent's summary PHUS 020,170).According to another one preferred embodiment of the present invention, photo engine has more than three, and for example 5, the light input module is so that widen the colour gamut of display.In this embodiment, the light input module is positioned in and comprises the photoconduction that is extended on the side and terminal surface of the color combiner of parts.Color combiner has a series of internal dichroic filters along its distribution of lengths, and it is used to receive the light from light generation module, and instructs light to arrive the homogenizing light pipe along the length of color combiner.
According to another aspect of the present invention, provide a kind of frame-sequential color projection display that is included in photo engine of the present invention described herein; Be used to modulate imaging device from the light of photo engine; Being used for will be from the optical relay of the photo engine relay optics to imaging device; The projection optics assembly is used for the optical projection after the modulation to indicator screen; Drive electronics is used for driving photo engine; With the control electronic device, be used to import shows signal and provide the image scanning signal, and be used to offer the synchronizing signal of drive electronics to imaging device.
Preferably, imaging device is the little imaging device of non-emission, for example silica-based reflective liquid crystal (LCOS) or Digital Light Processor (DLP).This projection display systems is very useful in commercial and client use, and is used for numeral and simulation shows signal are converted to full color figure and rest image demonstration and full mobile video and film.
According to another aspect of the present invention, use a kind of driving method according to frame-sequential color projection display of the present invention, the led chip group is driven by pulse current therein, and pulse current comprises at least 5 times of peak values to specified maximum DC drive current.
In the accompanying drawings:
Fig. 1 is the schematic diagram of frame-sequential color projection display of describing to use the prior art of monochromatic source.
Fig. 2 shows the schematic diagram of a kind of three color light engine embodiment of the present invention, and it is suitable for use in the frame-sequential color projection display of type shown in Figure 1;
Fig. 3 shows the schematic diagram of a kind of multicolored photo engine embodiment of the present invention, and it is suitable for use in the frame-sequential color projection display of type shown in Figure 1; And
Fig. 4 A is to use the curve chart of the reflectivity (R) of the dichroic filter in photo engine shown in Figure 3 at wavelength (λ) to Fig. 4 D.
Fig. 1 shows a kind of frame-sequential color projection display based on prior art
10Figure, its uses photo engine 11 to produce the light of different color to generate colored the demonstration.Photo engine 11 comprises the many groups monochromatic source 1,2,3 by different color ..., light source 12 that i forms and light are collected and color scheme optics 13.Each group monochromatic source can comprise the luminescence unit more than a same hue, and drive by drive electronics 17, drive electronics 17 will with carry out synchronous preset time from the frame synchronizing signal 21 of control electronic installation 18 and open the duration that one or more groups light source reaches definition.
Light from light collection and color scheme optics 13 is sent to imaging device 15 by relay optics 14.Imaging device 15 is modulated by the light that the 20 pairs of transmission of image scanning signal from control electronic installation 18 come.Control electronic installation 18 extracts image scanning signal 20 and frame synchronizing signal 21 from incoming video signal 19.Being projected optics 16 by the light of imaging device 15 modulation projects on the display screen and (does not show).
Fig. 2 shows three color light engine of the present invention
22An embodiment, it be fit to use in frame-sequential color projection display, for example system shown in Fig. 1
10In.Photo engine
22Comprise three light input modules 23,24,25, it is one of red, blue, green that each is used for three primary colors, color scheme parts 35 and homogenizing light pipe 38.Each light input module comprises one group of monochromatic source (26,27,28) of led chip form, and the light of the array format of single reflector (29,30,31) is collected optics and optical coupling assembly (32,33,34).
The size of array (29,30,31) determined by system parameters, the latitude of imaging device 15 for example, the aperture of projection optics 16 etc.
Each reflector is associated with a led chip.The advantage of this layout is to reduce heat dissipation.Exploitation along with the led chip that improves heat radiation, packed tightr of led chip will be allowed, or even the latitude of emulsion (etendue) of big led chip and optical system be complementary, thereby allow lesser number even single light collecting device, advantage is that the assembling complexity reduces.
Optical coupling assembly (32,33, the color scheme device 35 of the x-cube form that couples light to that 34) will collect, this is the commercial product that can buy, the dichroic filter that its use to intersect makes the light of selected color propagate into the output face of definition from its input face, and does not influence the propagation of the different colours light from other input faces to output face.
In Fig. 2, x-cube 35 has input face 35a, 35b, and 35c and output face 35d, and have two to have transmission surface 36a, 37a and reflecting surface 36b, the internal dichroic filters 36 and 37 of 37b respectively.In use, shine the reflecting surface 36b of dichroic filter 36 from the ruddiness (by arrow R indication) of color input module 23, be reflected to the direction of arrow G, (by the arrow G indication) shines transmission plane 36a, the 37a of dichroic filter 36 and 37 and from the green glow of color input module 24, by according to the transmission of the direction of arrow G, reflexed to direction shown in the arrow G by the reflecting surface 37b of dichroic filter 37 from the blue light (by the arrow B indication) of look color input module 25.Red, green, blue light is to have the light beam form of x-cube cross section, direction in arrow G is propagated the output face 35d that passes through x-cube 35, and enter into the input face 38a of homogenizing light pipe 38, its luminous intensity to whole beam cross-section averages and does not change the cross section and the angular dimension of light beam.Output beam after the homogenizing leaves photo engine 22 via output face 38b.
R, the centre wavelength of G and B color LED for example be 625+/-15nm (red), 530+/-15nm (green), 455+/-15nm (indigo plant).According to the layout of color LED module around x-cube, can use different filter combination.For in the layout shown in Fig. 2, filter 36 reflect red, by green glow and blue light, cut-off wavelength about 590+/-15nm, filter 37 reflect blue, by green glow and ruddiness, cut-off wavelength about 500+/-15nm.
In Fig. 2, light is collected optics and is described to reflection optics.But it also can be a refractive optical components, for example lens or Fresnel lens, the perhaps combination of reflection and refractive optical components.
Because x-cube has only three inlets, it can not make up the light more than three different colours.According to another one embodiment of the present invention, the dichroic filter of cascade can be used to make up in the photo engine light more than three kinds of colors.Such layout can be reproduced the wideer colour gamut of using the turquoise primary colours of conventional red to reproduce.This target is by the arrowband monochromatic source of color in limit of visible spectrum, LED for example, availability and easily supported.
As shown in Figure 3, such photo engine
40Embodiment comprise 5 light input modules (41,42,43,44,45), each has one group of monochromatic source (46,47,48,49,50), the array of reflector (51,52,53,54,55), and optical coupling part (56,57,58,59,60).Input module 41 is arranged on the inlet face 61a of color scheme parts 61, and remaining is along the reverse input face 61b of color scheme parts 61, and 61c distributes.
Color scheme parts 61 comprise 4 internal dichroic filters 62,63,64,65, each have first transmission plane (62a, 63a, 64a, 65a) and second reflecting surface (62b, 63b, 64b, 65b).Each filter is positioned as its reflecting surface in the face of one in the light input module 41,42,43,44,45, and is set to an angle, so that the light that reflects from the module of being faced arrives homogenizing light pipe 66 along direction of propagation P.Described filter is designed to have transmission and reflection characteristic, and the light that the dichroic filter 62 of winning is throwed from module 41 also reflects the light from second module 42; 63 reflections of second dichroic filter are also throwed the light from first and second modules 41,42 from the light of three module 43; The rest may be inferred.Like this, each dichroic filter reflects for contiguous color input module, but is transmissions for all previous colors.
Output beam from color combiner 61 enters into homogenizing light pipe 66 by output face 61b via input face 66a, and here it is homogenized before leaving photo engine 40 via output face 66b.
Dichroic filter can be an any known type, and for example dielectric film piles up or holographic filter.Filter can be trap (frequency band) filter, and its projection and/or reflection limit the wavelength of bandwidth.Perhaps, also can use edge filter, its projection and/or reflection specific wavelength and its above light are if sets of monochromatic light sources is according to the tactic words of their centre wavelength.Under this situation, preferably, first input module 41 has long wavelength's light output, and all the other modules 42,43,44,45 have the output of the wavelength that successively decreases.In such layout, the zone of reflections of dichroscope band filter 62,63,64,65 is represented as the reflectivity relative wavelength, is presented at Fig. 4 A respectively with the form of figure, 4B, and 4C is among the 4D.Perhaps, can use have the identical wavelength that successively decreases edge filter as the frequency band filter.
The typical color and the centre wavelength of such five color system are; Blue (455+/-15nm), blue or green (495+/-15nm), green (530+/-15nm), yellow (590+/-15nm) and red (625+/-15nm).Each color has the bandwidth (FWHM) of about 20nm.Can make filter and these centre wavelength and bandwidth value coupling.The typical cut-off wavelength of cut filter is the centre of two adjacent wavelength.For example, the filter of reflection cyan (495nm) and transmission blueness (455nm) have 475+/-near the 5nm cut-off wavelength.
In the frame sequence color monitor, (in general a particular color just is shown in the part of picture frame, less than the 1/n of picture frame time, wherein n is the number of primary colours), might be with than the high a lot of current impulse driving LED of specified maximum DC drive current.This is an advantage, because it causes quite high instantaneous light output.For example, we proved the Luxeon green LED and can be driven under 1/5 duty factor by 7 times of electric currents to specified maximum DC electric current, so that send 4 times of outputs to the instantaneous light output that obtains under specified maximum DC electric current.
Because the heating of chip is mainly by the RMS value decision of driving power,, obtaining higher instantaneous output, and do not damage LED or reduce its life-span so permission comes driving LED at short notice with quite high electric current (the doubly maximum DC of 5-7).Therefore, preferably by all LED of high impulse current drives.
The method that another one increases brightness is to adopt the slightly different LED source of a plurality of colors.As disclosed in published WO01/43113 by Pashley and Marshall (having transferred this assignee), different color can be combined into an independent light beam, and this light beam has the lumen output of increase and do not have or seldom increase the latitude of emulsion (etendue).For example commercial available blue led with peak wavelength 455nm and 470nm can make up to obtain the effect of blue channel, green LED with peak wavelength 525nm and 560nm can make up obtaining the effect of green channel, and the red LED with peak wavelength 617nm and 625nm can make up to obtain the effect of red channel.
Another aspect, the LED product of commercial usefulness has the specific distribution of the peak wavelength of nominal color, this typical order according to 30nm that distributes.The LED manufacturer can be divided into them in the different receivers based on peak wavelength distribution.If necessary, can customize LED, and use them to form brighter light beam based on required wavelength difference.
Use the technology of the slightly different led light source of a plurality of peak wavelengths can be used to all colors,, for example obtain the balance of color to obtain the increase of integral body or some chroma-luminancees.For example, if green LED brightness is limited, two green LED with different spectrum can make up the effective green light source that produces higher lumen output (and thereby reach whole white light balance lumen) by optical light filter; Just, use spectrum different green primary colours of nominal system and holographic filter or dichroic filter on wavelength to come the optics beam combination.Selectively, whole lumens that can reduce red and blue led are exported and are obtained correct white point.
Because the output intensity of color LED may not match with the requirement of required colour temperature, needs to drive the time that color group is longer than other color group sometimes.Therefore, the particular color group can be shown the time longer than the 1/n of picture frame time.
Can adjust driving pulse and obtain the multiple effect that is difficult to obtain in the mechanical system (for example color wheel system).For example, the colour temperature of display can easily be regulated the pulse duration of the drive current of one or more colors or pulse height by changing.For example, in order to obtain higher colour temperature, the pulse duration of the drive current of red LED group can be shortened; In order to obtain lower colour temperature, the pulse duration of the drive current of blue led group can be shortened.
The present invention has carried out describing necessarily with limited embodiment.But the mutation of other embodiment and embodiment will be conspicuous concerning those of skill in the art, and intention is included in these in scope of accompanying Claim.
Claims (22)
1. the photo engine (40) that is used for frame-sequential color projection display comprises:
At least two light input modules (41,42), each module comprises:
Sets of monochromatic light sources (46,47);
Be used to collect from the array of the light collecting device (51,52) of the light of light source group (41,42); With
Optical coupling part (56,57);
Color combiner (61) comprises input face 61a, 61b, 61c and output face 61d, and comprises the dichroic filter (62) that at least one has transmission plane (62a) and reflecting surface (62b); With
Light integrated component (66) is used for integrated light from color combiner (61), and the output face 61d that light integrated component (66) has input face 66a and a color combiner (61) is coupled and is used to export the output face 66b of integrated back light.
2. the photo engine described in claim 1 (22), wherein;
Have three light input modules (23,24,25) and
Color combiner comprises the x-cube (35) with two crossing dichroic filters (36,37).
3. the photo engine described in claim 1 (40), light collecting device wherein (51,52) comprises reflector.
4. the photo engine described in claim 1 (40), wherein at least one group of monochromatic source (46) comprises led chip array (46a, 46b, 46c), at least one light collecting device (51) comprises and led chip group (46a, 46b, the reflector that 46c) is associated (51a, 51b, 51c) array.
5. the photo engine described in claim 1 (40), wherein:
Have the first, the second, the the three, the four and the 5th smooth input module (41,42,43,44,45);
Color combiner (61) comprises the first, the second, the three, the four dichroic filter (62,63,64,65), each filter have transmission plane (62a, 63a, 64a, 65a) and reflecting surface (62b, 63b, 64b, 65b),
First input module (41) is positioned on first input face (61a) of color combiner (61), the second and the 4th input module (42,44) be positioned on second input face (61b) of color combiner (61), the the 3rd and the 5th input module (43,45) is positioned on the 3rd input face (61c) of color combiner; And
Described dichroic filter is set to and the second and the 3rd input face (61b, 61c) angled and have a reflecting surface towards input module, reflecting surface (62b) towards first dichroic filter (62) of second input module (42), reflecting surface (63b) towards second dichroic filter of the 3rd input module (43), towards the reflecting surface (64b) of the 3rd dichroic filter of the 4th input module (44), towards the reflecting surface (65b) of the 4th dichroic filter of the 5th input module (45).
6. the photo engine described in claim 5 (40), wherein the centre wavelength of the light that sends of the the first, the second, the three, the four and the 5th sets of monochromatic light sources (46,47,48,49,50) is respectively; Blue (455+/-15nm), blue or green (495+/-15nm), green (530+/-15nm), yellow (590+/-15nm) and red (625+/-15nm), each group has and is about 15 to 40nm transmitted bandwidth (FWHM).
7. the photo engine described in claim 1, wherein at least one group of monochromatic source comprises the LED with different peak wavelengths.
8. the photo engine described in claim 1, wherein the light integrated component is homogenizing light pipe (66).
9. the photo engine described in claim 4, wherein led chip and the layer combination that comprises at least one light-emitting fluophor.
10. a frame-sequential color projection display (10) comprises:
Be used to provide the monochromatic photo engine (11) of at least two kinds of different colours;
Be used to modulate imaging device (15) from the light of photo engine;
Being used for will be from the optical relay of photo engine (11) relay optics (14) to imaging device (15);
Projection optics (16), the optical projection that is used for modulating is to display screen;
Drive electronics (17) is used to drive photo engine; With
Control electronic installation (18) is used to import shows signal (19) and image scanning signal (20) is offered imaging device (15) and synchronizing signal (21) is offered drive electronics (17);
Characteristics are that photo engine comprises:
At least two light input modules (41,42), each module comprises:
Sets of monochromatic light sources (46,47);
Be used to collect from the array of the light collecting device (51,52) of the light of light source group (41,42); With
Optical coupling part (56,57);
Color combiner (61) comprises input face 61a, 61b, 61c and output face 61d, and comprises the dichroic filter (62) that at least one has transmission plane (62a) and reflecting surface (62b); With
Light integrated component (66) is used for integrated light from color combiner (61), and the output face 61d that light integrated component (66) has input face 66a and a color combiner (61) is coupled and is used to export the output face 66b of the light after integrated.
11. the frame-sequential color projection display described in claim 10 (10), wherein:
Have three light input modules (23,24,25) and
Color combiner comprises the x-cube of the dichroic filter (36,37) with two intersections.
12. the frame-sequential color projection display described in claim 10 (10), wherein:
Light collecting device (51,52) comprises reflector.
13. the frame-sequential color projection display described in claim 10 (10), wherein:
At least one sets of monochromatic light sources (46) comprise the led chip array (46a, 46b, 46c), at least one light collecting device (51) comprise with led chip set (46a, 46b, the reflector array that 46c) is associated (51a, 51b, 51c).
14. the frame-sequential color projection display described in claim 10 (10), wherein:
Have the first, the second, the the three, the four and the 5th smooth input module (41,42,43,44,45);
Color combiner (61) comprises the first, the second, the three, the four dichroic filter (62,63,64,65), each filter have transmission plane (62a, 63a, 64a, 65a) and reflecting surface (62b, 63b, 64b, 65b),
First input module (41) is positioned on first input face (61a) of color combiner (61), the second and the 4th input module (42,44) be positioned on second input face (61b) of color combiner (61), the the 3rd and the 5th input module (43,45) is positioned on the 3rd input face (61c) of color combiner; And
Dichroic filter is set to and the second and the 3rd input face (61b, 61c) angled and have a reflecting surface towards input module, reflecting surface (62b) towards first dichroic filter (62) of second input module (42), reflecting surface (63b) towards second dichroic filter of the 3rd input module (43), reflecting surface (64b) towards the 3rd dichroic filter of the 4th input module (44), towards the reflecting surface (64b) of the 3rd dichroic filter of the 4th input module (44), towards the reflecting surface (65b) of the 4th dichroic filter (65) of the 5th input module (45).
15. the frame-sequential color projection display described in claim 14 (10), wherein, the centre wavelength of the light that the the first, the second, the three, the four and the 5th sets of monochromatic light sources (46,47,48,49,50) is sent is respectively; Blue (455+/-15nm), blue or green (495+/-15nm), green (530+/-15nm), yellow (590+/-15nm) and red (625+/-15nm), each group has and is about 15 to 40nm transmitted bandwidth (FWHM).
16. the frame-sequential color projection display described in claim 10 (10) wherein has at least one group of monochromatic source to comprise the LED with different peak wavelengths.
17. the frame-sequential color projection display described in claim 10 (10), wherein the light integrated component is homogenizing light pipe (66).
18. photo engine as claimed in claim 13, wherein led chip and the layer combination that comprises at least one light-emitting fluophor.
19. a method that drives the integrated LED group as the frame-sequential color projection display of monochromatic source, the method comprise with at least 5 times to the current drives LED of specified maximum DC drive current group.
20. the method described in claim 19 drives and is realized by pulsed drive.
21. the method described in claim 20, wherein pulsed drive uses 1/5 of average duty factor to realize.
22. a method that drives integrated two or more LED group as the frame-sequential color projection display of monochromatic source, the method comprises uses the current impulse with different in width and/or differing heights to come the driving LED set.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55209404P | 2004-03-11 | 2004-03-11 | |
| US60/552,094 | 2004-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1947429A true CN1947429A (en) | 2007-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800078486A Pending CN1947429A (en) | 2004-03-11 | 2005-03-09 | Light engine for frame-sequential color projection display system having monochromatic light sources, system and driving method |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1728395A2 (en) |
| JP (1) | JP2007529035A (en) |
| CN (1) | CN1947429A (en) |
| WO (1) | WO2005088987A2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8345172B2 (en) | 2007-10-04 | 2013-01-01 | Nec Display Solutions, Ltd. | Video display device and light source driving method thereof |
| CN107702052A (en) * | 2016-08-09 | 2018-02-16 | 百奇股份有限公司 | It is preferably used for the light fixture of stage |
| CN111006141A (en) * | 2013-01-14 | 2020-04-14 | 罗布照明公司 | Improved homogenization system for LED lighting apparatus |
| US10883704B2 (en) | 2019-03-29 | 2021-01-05 | Robe Lighting S.R.O. | Homogenization system for an LED luminaire |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4118244B2 (en) * | 2004-03-29 | 2008-07-16 | 三洋電機株式会社 | Illumination device and projection display device |
| TWI467530B (en) * | 2007-04-27 | 2015-01-01 | Chunghwa Picture Tubes Ltd | Method for driving display |
| JP5495041B2 (en) * | 2010-03-31 | 2014-05-21 | カシオ計算機株式会社 | projector |
| CN105793766A (en) * | 2013-12-20 | 2016-07-20 | 华为技术有限公司 | Light source apparatus and method for generating a mixed-color light beam |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227669B1 (en) * | 1998-05-26 | 2001-05-08 | Industrial Technology Research Institute | Illumination device and image projection apparatus comprising the device |
| WO2001043113A1 (en) * | 1999-12-09 | 2001-06-14 | Koninklijke Philips Electronics N.V. | Display systems incorporating light-emitting diode light source |
| JP2001343706A (en) * | 2000-05-31 | 2001-12-14 | Sony Corp | Video display device |
| JP3991764B2 (en) * | 2002-05-10 | 2007-10-17 | セイコーエプソン株式会社 | Illumination device and projection display device |
-
2005
- 2005-03-09 EP EP05708980A patent/EP1728395A2/en not_active Withdrawn
- 2005-03-09 CN CNA2005800078486A patent/CN1947429A/en active Pending
- 2005-03-09 WO PCT/IB2005/050858 patent/WO2005088987A2/en not_active Application Discontinuation
- 2005-03-09 JP JP2007502487A patent/JP2007529035A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8345172B2 (en) | 2007-10-04 | 2013-01-01 | Nec Display Solutions, Ltd. | Video display device and light source driving method thereof |
| CN111006141A (en) * | 2013-01-14 | 2020-04-14 | 罗布照明公司 | Improved homogenization system for LED lighting apparatus |
| CN107702052A (en) * | 2016-08-09 | 2018-02-16 | 百奇股份有限公司 | It is preferably used for the light fixture of stage |
| US10883704B2 (en) | 2019-03-29 | 2021-01-05 | Robe Lighting S.R.O. | Homogenization system for an LED luminaire |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1728395A2 (en) | 2006-12-06 |
| WO2005088987A3 (en) | 2006-03-02 |
| JP2007529035A (en) | 2007-10-18 |
| WO2005088987A2 (en) | 2005-09-22 |
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Open date: 20070411 |