CN101918877A

CN101918877A - Light multiplexer and recycler, and micro-projector incorporating the same

Info

Publication number: CN101918877A
Application number: CN2009801022753A
Authority: CN
Inventors: 肯尼思·利
Original assignee: Wavien Inc
Current assignee: Wavien Inc
Priority date: 2008-01-17
Filing date: 2009-01-20
Publication date: 2010-12-15
Also published as: WO2009091610A9; EP2255242A4; EP2255242A1; KR20100103697A; WO2009091610A1; JP2011512547A; CA2710963A1

Abstract

A micro-projector comprises an LED layer, a light pipe coupled to the LED, a LCOS panel, a projection lens, a PBS, an aperture layer coupled to the output end of the light pipe which has a transmissive opening for transmitting a portion of the light output and a reflective surface for reflecting the remaining portion of the light output toward the input end of the light pipe. Thus, the remaining portion of the light output is recycled back to the LED to increase the brightness of the light output of the LED. The micro- projector also comprises a reflective polarizer disposed between the light pipe and the aperture layer for transmitting the light output of a predetermined polarization and reflecting other polarization of the light output, thereby recycling unused polarization of the light output back to the LED to increase the brightness of the light output of the LED.

Description

Optical multiplexer and recover and the micro-projector that comprises it

Technical field

The present invention relates to be used for the output of sequentially pulsed LED, increase the brightness of multiplexing LED output and it is incorporated in the system and method for micro-projector by retrieving especially.

Background technology

Light source is used in all types of illuminations application.Typical light source includes but not limited to arc lamp, Halogen lamp LED, fluorescent apparatus, microwave lamp and light emitting diode (LED).Many application needs have the illuminator of high-level brightness in little effective emitting area.Usually can realize this high-caliber brightness by increasing more light sources.Yet if the space of integrated optical source is limited, this may be impossible technically, and because the integrated and a plurality of light sources meeting of use costliness, this is infeasible economically.Therefore, the present invention is based on that expectation increases the brightness of light source and the number that do not increase light source carries out.

For example, (micro-display based television MDTV) has the potentiality of low-cost screen sizes based on the TV of little demonstration.MDTV is usually by arclighting for tradition.Although this light source reaches the brightest with least cost, shortly make it not conform to people's will yet white light need be divided into 3 colors and life-span.Along with the LED development of technology, need to consider to use LED, with long life characteristics and other benefits of obtaining LED, as instantaneous starting as the light source among the MDTV.Yet, current, enough not bright for using little imaging panel or having than the low cost of giant-screen is used a LED.The brightness of having used the LED recovery scheme to improve light source is referring to the United States Patent (USP) 6,869,206 that licenses to people such as Zimmerman.Yet people such as Zimmerman have described the LED that surrounds in the light reflection cavity with a light output aperture.And the United States Patent (USP) 6,144,536 that licenses to people such as Zimmerman has been described the fluorescent light with glass big envelope, and it has the fluorescence coating of surrounding the hollow inside that gas fills.A part of light that the fluorescence coating generates is recovered gets back to the fluorescence coating.The present invention is based on and expect a kind of retracting device to be provided and to carry out, this retracting device can be coupled to one or more LED, with by retrieving to increase the available brightness of LED effectively, thereby make and to use less panel maybe can illuminate giant-screen with sufficient brightness.

For example, LED is a kind of light source that uses in using as many illuminations of general illumination, architectural lighting and nearest projection TV.When for example being used in the projection TV, LED must be luminous in little effective emitting area with levels of brightness, so that necessary high light output is provided on TV screen.Particularly, LED must provide the strong and bright light of measuring with lumen with little solid angle in little emitting area, with useful in projection TV.

Although existing huge advance made aspect light emitting diode (LED) development, the output brightness of current usable LED is still not enough for most of projection application.Proposed the whole bag of tricks and be used for making up color and the primary colors of LED and reclaim output light, to improve brightness.Yet the major part of these methods relates to be utilized expensive assembly and/or causes big heavy device, and this has limited its application greatly.Therefore, the present invention is based on expectation provides the low-cost LED multiplexer with recovery that addresses these problems and carries out.

Along with the progress of information transfer connection, image is shown as for communication mode important on the market.For example, although portable electron device (as mp3 player, mobile phone, audio frequency and/or video player, portable digital-assistant (PDA)) continues to reduce on size and price, the demand for big viewing area in these portable electron devices remains unchanged.Therefore, now screen size limitations the size of these portable electron devices, and micro-projector is incorporated in the portable electron device will be to conform with very much expectation, however it has expensively stoped this to merge completely.Yet current available micro-projector has the structure of simplifying simply from the standard projection device, the result, and cost is Tai Gao and can not incorporating in the low-cost portable electron device still.For any assembly that will embed in these portable electron devices, most important parameter is size and cost.Therefore, the present invention is based on expectation provides the low-cost micro-projector according to the integrated multiplexer/recover of having of the embodiment of the invention to carry out.

Therefore, the present invention is based on following expectation and carry out: provide low-cost LED multiplexer to improve the brightness of LED, keep the small size of LED multiplexer simultaneously with recovery.This allows LED multiplexer/recover of the present invention easily to incorporate in the low-cost micro-projector, to be used in the low-cost portable electron device.That is to say that micro-projector of the present invention is associated with the LED multiplexer with recovery, small-sized to advantageously provide, low-cost, multi-functional and based on the illuminator of bright LED, it can be easily integrated with portable electron device.The all right multiplexing color of LED-based illuminator is to provide colour element to show and the time series demonstration.

Summary of the invention

Therefore, the purpose of this invention is to provide LED multiplexer to improve the brightness of LED with recovery.

Another object of the present invention provides a kind of small low-cost LED multiplexer with recovery, and it can easily be incorporated in the micro-projector.

Further purpose of the present invention provides the RGB multiplexer based on light pipe with recovery, thus output and RGB output and recovery output raising brightness to make up LED effectively.

Another purpose of the present invention provides a kind of wafer scale LED illuminator that expands in the wafer scale LED projector system.That is to say, can make complete illumination and optical projection system with the wafer form, and can be cut to independent system at last.

Another purpose of the present invention provides a kind of low-cost micro-projector that is used in the portable electron device, and it has merged LED multiplexer/recover of the present invention.

According to example embodiment of the present invention, optical multiplexer and recover comprise the LED layer, and this LED layer has a plurality of LED of each self-emission light output.Optical multiplexer and recover further comprise the optical layers with input end and output terminal.The input end of optical layers is coupled to a plurality of LED, with multiplexing light output from a plurality of LED.The aperture layer is coupled to the output terminal of optical layers, and it has the part that is used for the output of the multiplexing light of transmission with transmissive apertures that single light output is provided and be used for reflecting surface to the remainder of the multiplexing light of the input end reflection of optical layers.Thereby the remainder of multiplexing light is recovered gets back to a plurality of LED, with the brightness of the light output that improves a plurality of LED.

According to example embodiment of the present invention, micro-projector comprises the LED layer of the LED with the output of emission light.Micro-projector further comprises the light pipe with input end and output terminal, and wherein the input end of light pipe is coupled to LED.The aperture layer is coupled to the output terminal of light pipe, and it has the transmissive apertures of a part that is used for transmitted light output and is used for reflecting surface to the remainder of the input end reflected light output of light pipe.Thereby the remainder of light output is recovered gets back to LED, with the brightness of the light output that improves LED.Micro-projector also comprises the reflective polarizer that is arranged between light pipe and the aperture layer, is used for other polarizations of the light output and the reflected light output of transmission predetermined polarisation, thereby the untapped polarization recovery of light output is got back to LED, with the brightness of the light output that improves LED.Micro-projector further comprises liquid crystal on silicon (the liquid crystal on silicon that is used to receive and reflect the light output of predetermined polarisation, LCOS) panel, wherein the size of transmissive apertures basically with the size match of LCOS panel, make the face of PBS of coupling LCOS panel greater than the LCOS panel.In addition, micro-projector comprises projecting lens, is used for catching from the LCOS panel light output of predetermined polarisation, with projected image.

According to example embodiment of the present invention, micro-projector comprises the LED layer of the LED with the output of emission light, and also has the light pipe that comprises input end and output terminal.The input end of light pipe is coupled to LED.Micro-projector further comprises the polished polarization beam splitter (PBS) so that total internal reflection to be provided of all surface, thereby makes PBS be used as waveguide.

Various other purposes of the present invention, advantage and feature will become obviously easily according to subsequently detailed description, and will particularly point out novel characteristics in claims.

Description of drawings

The following detailed description that provides as an example is not intended to the present invention is only limited to this, and will understand this detailed description best in conjunction with the accompanying drawings, and wherein identical assembly or feature represented with identical Reference numeral in each figure:

Fig. 1 be according to illustrated embodiments of the invention based on the optical multiplexer of light pipe and the sectional view of recover;

Fig. 2 illustrate Fig. 1 based on the optical multiplexer of light pipe and the skeleton view of recover;

Fig. 3 is the skeleton view according to the output terminal of the light pipe that is coated with reflectance coating except that transmissive apertures of illustrated embodiments of the invention;

Fig. 4 is according to illustrated embodiments of the invention, of the present invention based on the optical multiplexer of light pipe and the skeleton view of recover, and wherein the thin glass plate of selectivity coating is attached to the input end of light pipe;

Fig. 5 is according to illustrated embodiments of the invention, the optical multiplexer of the present invention that uses the light genetic horizon that is encouraged by external light source and the sectional view of recover;

Fig. 6 is according to the optical multiplexer of the present invention of illustrated embodiments of the invention, Fig. 5 and the sectional view of recover, and wherein the light genetic horizon directly is coated on the external light source;

Fig. 7 (a)-(b) is the sectional view according to the chamber that holds light genetic horizon and/or external drive light source of illustrated embodiments of the invention;

Fig. 8 (a) is according to the optical multiplexer of the present invention of illustrated embodiments of the invention, Fig. 5 and the sectional view of recover, and wherein the light genetic horizon comprises the one or more different light generating material by the laser instrument excitation;

Fig. 8 (b) according to illustrated embodiments of the invention, comprise figure by the light genetic horizon of three generating materials of not sharing the same light of laser instrument excitation;

Fig. 9 (a)-(c) is according to the optical multiplexer of the present invention of illustrated embodiments of the invention, Fig. 5 and the sectional view of recover, and wherein the light genetic horizon comprises the one or more different light generating material by one or more laser instrument excitations;

Figure 10 is the sectional view according to the light genetic horizon with coating of illustrated embodiments of the invention;

Figure 11 according to illustrated embodiments of the invention, be used for the sectional view of multiplexing three coloramas from three different light generating materials with three cube prism forming single output;

Figure 12 is the synoptic diagram according to the wafer scale illuminator of illustrated embodiments of the invention and/or wafer scale projector system;

Figure 13 be according to illustrated embodiments of the invention based on the wafer scale illuminator of light pipe and/or based on the synoptic diagram of the wafer scale optical projection system of light pipe;

Figure 14 is the synoptic diagram of the wafer scale illuminator and/or the wafer scale projector system of another example embodiment according to the present invention;

Figure 15 is the sectional view according to the LED encapsulation with cloche of illustrated embodiments of the invention;

Figure 16-the 19th is according to the sectional view of the micro-projector of illustrated embodiments of the invention;

Figure 20 according to illustrated embodiments of the invention, except that the opening of coupling LCOS panel the figure of the PBS face of being reflected property coating;

Figure 21 is the sectional view according to the micro-projector of the merging DMD of illustrated embodiments of the invention; And

Figure 22-the 26th is according to the optical multiplexer of illustrated embodiments of the invention and the figure of recover.

Embodiment

With reference to the accompanying drawings, example embodiment of the present invention is described now.These embodiment show principle of the present invention, and should not be construed as limiting the scope of the invention.

According to illustrated embodiments of the invention, optical multiplexer and recover 1000 comprise the LED layer 1100 with a plurality of LED1140.Each LED 1140 is to the output of optical layers 1200 (as light pipe 1200) emission light.Optical layers 1200 has input end 1210 and output terminal 1220.The input end 1210 of optical layers 1200 is coupled to a plurality of LED 1140, with multiplexing light output from a plurality of LED 1140.In addition, optical multiplexer and recover 1000 comprise the aperture layer 1500 of the output terminal 1220 that is coupled to optical layers 1200, as reflectance coating 1500.The reflecting surface of a part to provide single light to export 1600 transmissive apertures 1510 and be used for reflecting to the input end 1210 of optical layers 1200 remainder of multiplexing light that is used for the multiplexing light output of transmission is provided aperture layer 1500, thereby the remainder of multiplexing light is got back to a plurality of LED 1140, with the brightness of the light output that improves a plurality of LED 1140.Preferably, reflection horizon 1400 covers the input end 1210 of light pipe 1200, except the

zone

1410,1420,1430 of the input end 1210 of the light pipe of a plurality of LED 1140 that are coupled, so that except

zone

1410,1420,1430, input end 1210 all is reflexive for the light of all colours.

According to illustrated embodiments of the invention, Fig. 1 shows based on the optical multiplexer of light pipe and recover 1000, and it comprises having LED layer 1110 and optical layers or the light pipe 1200 that is installed in a plurality of led chips 1140 on the heating radiator 1150.LED multiplexer and recover 1000 uses the output of the multiplexing or combinations red of light pipe 1200, green and blue led chip 1110,1120,1130, to produce single output 1600.According to an aspect of the present invention, reflection horizon 1400 is the input end of light pipe 1200 or the reflectance coating 1400 on the surface 1210, so that except the zone or the zone corresponding to led chip 1140 on above-mentioned input end or surface 1210, input end 1210 all is reflexive for the light of all colours.In addition, the zone 1410 of the input end 1210 of above-mentioned light pipe 1200 or be coated with the red coating of transmission corresponding to the zone 1410 of red led chip 1110, however its transmit red light reflects other coloramas, as green glow and blue light.Similarly, the zone 1420 of the input end 1210 of above-mentioned light pipe 1200 or be coated with the green coating of transmission corresponding to the zone 1420 of green led chip 1120, however its transmit green reflects other coloramas, as ruddiness and blue light.The zone 1430 of above-mentioned input end 1210 or be coated with the blue coating of transmission corresponding to the zone 1430 of blue led chip 1130, however its transmit blue reflects other coloramas, as ruddiness and green glow.Although Fig. 1 only shows a red led chip 1110, a green led chip 1120 and a blue led chip 1130, it should be understood that, a plurality of red led chips 1110 can be installed, a plurality of green led chips 1120 and a plurality of blue led chip 1130 on heating radiator 1150.Preferably, the output terminal of light pipe 1200 or surface 1220 have reflectance coating 1500, except the zone or transmissive apertures 1510 on the output terminal of coupling output 1600 or surface 1220.

When the ruddiness from red led chip 1110 enters in the light pipe 1200, a part of ruddiness will leave light pipe by transmissive apertures 1510.The remainder of ruddiness or residue ruddiness will be reflected back to the input end 1210 of light pipe 1200 and be recovered.Similarly, when from the green glow of green led chip 1120 with when entering in the light pipe 1200 from the blue light of blue led chip 1130, part green glow and ruddiness leave light pipe 1200 by transmissive apertures 1510, and the green glow of remainder and ruddiness are recovered.

Fig. 2 shows according to the optical multiplexer of nine led chips 1140 with three different colours (RGB) of illustrated embodiments of the invention and the skeleton view of recover.In actual applications, can optimize the number of led chip 1140 and the color that led chip 1140 sends, to produce the output of expectation.Can arrange led chip 1140,3 * 3 arrays as shown in Figure 2 with any M * N array (wherein M and N are positive integers).

Fig. 3 shows two examples of aperture layer 1500, and its output terminal 1220 at the light pipe 1200 that the coating 1510 that is reflected is surrounded comprises transmission or outlet opening 1510.Transmissive apertures 1510 is less than the output terminal 1220 of light pipe 1200.In addition, transmissive apertures 1510 can have aspect ratio or any other the acceptable aspect ratio of 16: 9 (Fig. 3 (a)), 4: 3 (Fig. 3 (b)).

According to illustrated embodiments of the invention, transmissive apertures 1510 is coated with reflectance coating 1530, the light (as ruddiness) of these reflectance coating 1530 transmission predetermined colors, and to the light of the every other color of input end 1210 reflection of light pipe 1200 to reclaim.Preferably, transmissive apertures 1510 can additionally be coated with polarization by reflection coating 1540 or be coated with reflecting polarizing layer 1540, with the output of the light of transmission predetermined polarisation (as s polarization or p polarization), and the light output of reflecting every other polarization (that is the not use polarization of light) is to reclaim.Alternately, transmissive apertures 1510 is coated with the polarization by reflection coating or is coated with reflecting polarizing layer 1540 under the situation that does not have reflectance coating 1530.According to an aspect of the present invention, optical multiplexer and recover 1000 additionally comprise and are arranged between reflecting polarizing layer 1540 and the reflectance coating 1530 or are arranged in wave plate 1550 between reflecting polarizing layer 1540 and the transmissive apertures 1510.Wave plate 1550 rotates the polarization state of light output, and changes the optical rotation that do not use of light the useful predetermined polarisation of light into.

According to illustrated embodiments of the invention, optical multiplexer and recover 1000 comprise colour wheel, and colour wheel comprises a plurality of color filters, are used for transmission corresponding to the colorama of color filter and reflect the light of every other color.That is to say that the colour wheel that reflectance coating 1530 is capped transmissive apertures 1510 substitutes, transmissive apertures 1510 is used to depend on which color filter of colour wheel covers transmissive apertures 1510 and the light of transmission different colours optionally.

As shown in Figure 1 and Figure 2, illustrated embodiments of the invention have the reflectance coating 1400,1500 on the input and

output side

1210,1220 that directly is coated in light pipe 1200.This is very effective, yet may be expensive.Therefore, in low cost is used, can separately realize reflectance coating 1400,1500, as the thin glass plate 1400 that uses optionally reflection to apply.Big glass plate can be optionally or patterning be coated with reflectance coating, and be cut into input end 1210 or the output terminal 1220 of suitable size then, as shown in Figure 4 to be matched with light pipe 1200.The glass plate 1400 that patterning or selectivity apply is attached to light pipe 1200.

According to illustrated embodiments of the invention, light pipe 1200 can be in following: the free form light pipe that the light pipe of hollow, solid light pipe, straight light pipe, the cumulative light pipe that attenuates, the light pipe that decrescence attenuates, compound parabolic concentrator, shape are limited by equation or digitally or complete free form light pipe or any suitable combination otherwise determined, and as straight hollow light tube, the cumulative solid light pipe that attenuates.All these various light pipes will be called light pipe jointly at this.Light pipe any mentioned comprise any light pipe of setting forth or the combination of various light pipes herein.

According to illustrated embodiments of the invention, as shown in Figure 5, optical multiplexer and recover 1000 comprise light genetic horizon 1700 at input side, and light genetic horizon 1700 is used for launching light and having reflecting surface by light source 1750 excitations the time.The input end 1210 of light pipe 1120 is coupled to light genetic horizon 1700, thereby provides light output with multiplexing light from light genetic horizon 1700.As shown in Figure 1, optical multiplexer and recover 1000 comprise aperture layer 1500 at outgoing side, aperture layer 1500 is coupled to the output terminal 1220 of light pipe 1200, and have the transmissive apertures 1510 that is used for the output of transmission part light and to the reflecting surface of the remainder of light genetic horizon 1700 reflected light output, this light genetic horizon 1700 is with the remainder reflection of light output and get back to transmissive apertures 1510.

So point out in the place, although it is not shown among Fig. 5, the optical multiplexer and the recover 1000 that comprise light genetic horizon 1700 also comprise light pipe 1200, wherein output terminal 1220 partially or completely is coated with reflectance coating 1530 and/or reflecting polarizing layer 1540 and/or wave plate 1550, light with transmission predetermined color and/or polarization, and the light of every other untapped color of reflection/recovery and/or polarization, as shown in Figure 1.The input end 1210 of light pipe 1200 with arrange by the light genetic horizon 1700 of external light source 1750 excitations contiguously so that coupling light in the light pipe 1200 of launching of light genetic horizon 1700.Preferably, light genetic horizon 1700 also is reflexive, so that reflected back into the output terminal 1220 of light pipe 1200 whole or in part from reflective light genetic horizon 1700 from the light of output terminal 1220 reflection of light pipe 1200.

According to example embodiment of the present invention, the light genetic horizon 1700 contiguous with the input end 1210 of light pipe 1200 comprises one or more material compositions, has the light of a plurality of wavelength or color with emission.That is to say that light genetic horizon 1700 can depend on that the material composition of light genetic horizon 1700 only launches the light of a color or the light of a plurality of colors.Preferably, the various material compositions of light genetic horizon 1700 spatially are scattered in and make each zone of light genetic horizon 1700 launch the light of different colours.External drive light source 1750 can be arc lamp, LED, laser instrument etc., and it launches the light of single wavelength or a plurality of wavelength (that is, single color or a plurality of color).According to an aspect of the present invention, excitation wavelength (that is external drive light source 1750 wavelength of light emitted) can be shorter than the wavelength of light genetic horizon 1700 emissions.For example, indigo plant or UV light can be with generating red, green, blue or other coloramas.Preferably, light genetic horizon 1700 can or have with the other materials of fluorescence same alike result by fluorescence and makes.Alternately, excitation wavelength also can be longer than the wavelength of light genetic horizon 1700.For example, infrared light can be used for using nonlinear crystal to generate red, green, blue or other coloramas.

According to illustrated embodiments of the invention, similar to the reflectance coating 1400 of Fig. 1, light genetic horizon 1700 can be coated on the input end 1210 of light pipe.Alternately, similar to the thin glass plate 1400 of Fig. 4, light genetic horizon 1700 can be coated on the sheet (for example glass plate) of transparent material, and input end 1210 placements of next-door neighbour's light pipe 1220, or directly is coated on the exciting light source 1750 as shown in Figure 6.For example, the fluorescence material can directly be coated on indigo plant or the UV LED 1750, and nonlinear crystalline material can directly be coated on the infrared LED 1750.The example of indigo plant or UV LED 1750 is to go up the light-emitting junction of making at gallium nitride (GaN).The example of infrared LED 1750 is to go up the light-emitting junction of making at gallium arsenide (GaAs).

According to illustrated embodiments of the invention, shown in Fig. 7 (b), light genetic horizon 1700 is placed between all or part of reflection horizon 1810 forming chamber 1800 at the opposite side of light genetic horizon 1700, thereby realizes that littler output angle distributes or reduces the angular distribution of the light of light genetic horizon 1700 emissions.According to an aspect of the present invention, exciting light source 1750 and light genetic horizon 1700 are all in chamber 1800, shown in Fig. 7 (a).

According to illustrated embodiments of the invention, shown in Fig. 8 (a), light genetic horizon 1700 comprises one or more different light generating materials 1710 (for example, comprising the fluorescence of different colours), and it is used for launching the light of one or more colors when being encouraged by laser instrument.The light generating material can be arranged with row, column, array or certain predetermined pattern.For example, Fig. 8 (b) shows the light genetic horizon 1700 with three generating materials 1710 of not sharing the same light (green, red and blue light generating material 1710).Preferably, laser instrument is a diode laser.The example of indigo plant or UV laser instrument is to use the laser instrument of GaN made.The laser instrument that the example of infrared laser is to use GaAs to make.

According to illustrated embodiments of the invention, shown in Fig. 9 (a), one or more laser instruments 1750 can be used for the one or more different light generating material 1710 of exciting light genetic horizon 1700.For example in Fig. 9 (b), can use three different laser instruments 1750, the different light generating material 1710 of each laser instrument 1750 excitation, thus make optical multiplexer and recover 1000 can control emission independently from three different colours of light genetic horizon 1700.According to an aspect of the present invention, can use more than a laser instrument 1750 and encourage same smooth generating material 1710, thereby produce higher light output from this light generating material.For example, in Fig. 9 (c), red and blue light generating material 1710 is encouraged by a laser instrument 1750 separately, and green glow generating material 1710 is encouraged by two laser instruments, thereby produces BELAND or the more green glows of ruddiness by light genetic horizon 1700.

According to illustrated embodiments of the invention, as shown in figure 10, light genetic horizon 1700 is coated, so that coating 1760 transmissions are from the light of exciting light source 1750, yet the light that reflected light genetic horizon 1700 generates, make and only launch the light that is generated, thereby improve the efficient of smooth genetic horizon 1700 of the present invention and optical multiplexer and recover 1000 in a direction.Preferably, the light genetic horizon 1700 of close exciting light source 1750 is surperficial coated.

According to illustrated embodiments of the invention, be used for encouraging three different light generating materials 1710 (red, green and blue light generating material 1710) from the laser beam of three various lasers 1750.As shown in figure 11, (total internal reflection, TIR) prism or cube 1900 will be multiplexed into single output from the light of three light generating materials, 1710 emissions to use three total internal reflections.Because laser beam has very narrow emission angle, so can export thereby produce higher light by encouraging each colorama generating material 1710 more than a laser beam.For example, if need higher green glow output for white balance, then can be with two laser beam direction green glow generating materials 1710, and only a laser beam is led separately blue and ruddiness generating material are exported thereby produce higher green glow.

According to an aspect of the present invention, TIR cube prism cube 1900 comprises two triangular prisms.The all surface or the face of these two triangular prisms are polished, so that TIR cube prism 1900 is as waveguide.The face of the triangular prism of the interface between two triangular prisms is coated with double-colored coating 1910, with the light of transmission predetermined wavelength or color and reflect the light of every other wavelength or color.Preferably, interface is filled with clearance or low index glue.

Present 12-14 with the aid of pictures shows the synoptic diagram according to the wafer scale illuminator 2000 and/or the wafer scale projector system 3000 of illustrated embodiments of the invention.Wafer scale illuminator 2000 comprises the radiator layer 2100 that is used to install LED wafer or layer 2200, optional color-filter layer 2300 (preferred, color-filter layer 2300), optical layers 2400 and aperture layer 2500.Wafer scale projector system 3000 additionally comprises reflecting polarizing layer 2600, imaging or display surface flaggy 2700 (as liquid crystal display (LCD) panel layer or transmission imaging panel layer) and projecting lens layer 2800.Current techniques allows to make LED with same color, yet can use the color fluorescence thing to make different color LEDs 2210 on same wafer according to illustrated embodiments of the invention.Can use the color fluorescence thing will convert some other colors to from the emission of same color LED 2210.For example, indigo plant or UV LED wafer can be used to provide a plurality of LED 2210 of single color.Different color fluorescence things can be deposited on the LED wafer, thereby produce different color LED 2210.That is to say, can use the red, green and blue fluorescence to produce three primary colors (RGB) emission LED 2210.

Preferably, color-filter layer 2300 is placed on the LED layer 2200 that comprises color LED 2210, to improve the organic efficiency of wafer scale illuminator 2000.Color filter on the top of color LED 2210 only the color of transmission LED 2210 emission light and reflect the light of every other color.For example, the color filter on the top of blue LED 2210 will be only transmit blue and will reflect the light of every other color.Use for white or monochromatic LED, color-filter layer 2300 is dispensable and can be removed.

Optical layers 2400 is changed light or be imaged onto layer subsequently.According to illustrated embodiments of the invention, as shown in figure 12, optical layers 2400 comprises reflector layer 2420 and lens jacket 2440.Depend on application, optical layers 2400 can comprise the array of light pipe 2450 as shown in figure 13, or spherical reflector layer 2460 and collimation lens layer 2480.Should be understood that and depend on application that wafer scale illuminator 2000 and wafer scale projector system 3000 can have a plurality of optical layers 2400.

According to illustrated embodiments of the invention, light pipe 2450 can be in following: the free form light pipe that the light pipe of hollow, solid light pipe, straight light pipe, the cumulative light pipe that attenuates, the light pipe that decrescence attenuates, compound parabolic concentrator, shape are limited by equation or digitally or complete free form light pipe or any suitable combination otherwise determined, and as straight hollow light tube, the cumulative solid light pipe that attenuates.All these various light pipes will be called light pipe jointly at this.Light pipe any mentioned comprise any light pipe of setting forth or the combination of various light pipes herein.

The light that leaves optical layers 2400 is incident on the aperture layer 2500 that comprises a plurality of apertures or transmissive apertures 2510 then, and wherein a part of light is reflected and a part of light passes through aperture 2510.The light of reflection is recovered back in LED 2210.Export by the not polarized light that only can be used for not polarization application that aperture 2510 leaves, thereby wafer scale illuminator 2000 is provided.

Use for LCD, liquid crystal on silicon (LCOS) and other polarized lights,, use optional reflecting polarizing layer 2600 for wafer scale optical projection system 3000 is provided.Preferably, reflecting polarizing layer 2600 comprises the wave plate layer (not shown) similar to the wave plate 1550 among Fig. 1.Reflecting polarizing layer or reflective polarizer 2600 transmission predetermined polarisation also reflect back into the every other polarization (that is, untapped light polarization) of light in the LED layer 2200, thereby improve the effect that reclaims.Optionally the wave plate layer rotates the polarization state of light output, and changes the optical rotation that do not use of light the useful predetermined polarisation of light into.In this stage, comprise that the composite crystal of illuminating layer 2100-2600 (having or do not have optional color-filter layer 2300, optional reflecting polarizing layer 2600 or optional wave plate layer) forms the array of LED illuminator 2000.The array of LED illuminator 2000 can be cut into independent part on sawing line 2900, so that the LED illuminator 2000 of a plurality of separation to be provided.

According to illustrated embodiments of the invention, wafer scale illuminator 2000 can be further integrated with other layers, so that wafer scale projector system 3000 to be provided.Wafer scale projector system 3000 further comprises demonstration or the imaging surface flaggy 2700 on the top that is placed on illuminating layer 2100-2600, is one or more projecting lens layers 2800 subsequently.Figure 12 shows the wafer scale projector system 2000 according to illustrated embodiments of the invention, and wherein the imaging surface flaggy comprises transmission LCD panel 2710.For colour element LCD panel 2710, LED 2210 can be the white LEDs 2210 with white fluorescence, maybe can be red/green/blue (RGB) LED 2210 that the ability with real-time adjustment color combines.For quick switching LCD panel 2700, the anti-shadow device of wafer scale system 3000 can use known time color multiplexing, one or more with among the one-shot red, green, blue LED 2210.Once more, complete projector unit/system 3000 can be cut into independent projector unit/system 3000 in the wafer on sawing line 2900.

Figure 13 illustrates and use light pipe to realize the wafer scale optical projection system, and similarly, imaging surface flaggy 2700 and projection lens layer 2800 can be added to illuminating layer 2100-2600 among Figure 14 so that the wafer scale optical projection system to be provided.

For the embedded micro-projector that uses in the portable electron device as mobile phone, MP3 player, portable digital-assistant (PDA) etc., most important parameter is size and cost.Therefore, it is important making the number of the assembly in these embedded micro-projectors minimize to reduce its size and cost.According to illustrated embodiments of the invention, micro-projector utilizes a plurality of LED, i.e. red, green and blue LED in single encapsulation.Light output from a plurality of LED is re-used with combined colors, is recovered the brightness with raising LED, and is not having to be coupled to the LCOS panel under the situation of lens, thereby minimize the number of assembly.

See Figure 15 now, show the structure of the LED encapsulation 4000 that comprises a plurality of LED 4100.Preferably, LED encapsulation 4000 comprise generally that of being provided by the LED manufacturer as Ou Silang (Osram) is red, an indigo plant and two green LED 4100.According to illustrated embodiments of the invention, the substrate 4300 that LED encapsulation 4000 has the cover window (cover window) that preferably is coated with double-colored coating 4400 or cloche 4200 and is used to install a plurality of LED 4100.For example, on the top of red LED4100, coating 4400 transmit red light and reflect the light of every other color, as shown in figure 15.On the top of green LED 4100, coating 4400 transmit green and reflect the light of every other color, as shown in figure 15.On the top of blue LED 4100, coating 4400 transmit blue and reflect the light (not shown) of other colors.According to illustrated embodiments of the invention, each color LED 4100 is driven individually.Alternatively, two green LED 4100 can be driven together or separately.

Figure 16 shows the micro-projector 5000 according to the merging LED structure 4000 of illustrated embodiments of the invention.Micro-projector 5000 according to illustrated embodiments of the invention comprises LED encapsulation 4000, light pipe 5100, PBS 5200, projecting lens 5600, LCOS panel 5500, optional reflective polarizer 5300 and optional wave plate 5400.Light pipe 5100 with input end or face 5110 covers all LED 4100 of LED encapsulation 4000 basically, is placed on the light that covers on window 4200 encapsulated window and be used for being coupled and launch from LED 4100.According to illustrated embodiments of the invention, light pipe 5100 can be in following: the free form light pipe that the light pipe of hollow, solid light pipe, straight light pipe, the cumulative light pipe that attenuates, the light pipe that decrescence attenuates, compound parabolic concentrator, shape are limited by equation or digitally or complete free form light pipe or any suitable combination otherwise determined, and as straight hollow light tube, the cumulative solid light pipe that attenuates.All these various light pipes will be called light pipe 1200 jointly at this.Light pipe any mentioned comprise any light pipe of setting forth or the combination of various light pipes herein.

The output terminal 5120 of light pipe 5100 has and polarization beam splitter (PBS) 5200 essentially identical sizes, will couple light among the PBS 5200.PBS 5200 all surfaces are all polished so that it is as waveguide.Between light pipe 5100 and PBS 5200, place reflective polarizer 5300 and make that only the predetermined polarisation of light is transmitted among the PBS 5200.Between light pipe 5100 and reflective polarizer 5300, can use optional wave plate 5400 (preferred quarter-wave plate) to improve the organic efficiency of system.As shown in figure 16, LCOS panel 5500 is directly relatively placed with light pipe 5100.Depend on PBS 5200 towards, LCOS panel 5500 can be placed on the vertical plane as shown in figure 17.As Figure 16 or shown in Figure 17, projecting lens 5600 can be placed vertically with light pipe.Because the light that is incident on the LCOS panel 5500 has specific diversity, generally at F/2.4, so PBS 5200 is greater than LCOS panel 5500, so that catch light and do not blocked by PBS 5200 by projecting lens 5600.LCOS panel 5500 and PBS 5200 near-earth as far as possible place with minimum losses.In the face of the surface-coated of the PBS 5200 of LCOS panel 5500 has the reflectance coating 5210 with opening 5215, make the size of opening 5215 and the size match of LCOS panel 5500.As a result, a part of light LCOS panel 5500 that will throw light on, and be incident on the remainder of the light on the reflectance coating 5210 or all the other and be reflected back in the light pipe 5100 and be recovered and get back in the LED encapsulation 4000.

According to illustrated embodiments of the invention, shown in Figure 18,19, can eliminate the reflective polarizer 5300 among Figure 16,17, and shown in Figure 18,19, its function can be gone up the combination replacement of the reflectance coating 5210 that adds by PBS 5200 and PBS.This has advantageously eliminated one or more assembly from micro-projector, thereby has reduced the cost of micro-projector.

According to illustrated embodiments of the invention,, can make output terminal 5120 projectioies of light pipe 5100 for the coupling of improved light.Preferably, the convex surfaces of the output terminal 5120 of light pipe 5100 forms integral lens.According to an aspect of the present invention, the function of integral lens can be carried out by the optional Fresnel Lenses 5700 that is arranged between light pipe 5100 and the PBS 5200.The advantage of Fresnel Lenses 5700 is that it is extremely thin and be very suitable for integrated micro-projector of the present invention.Preferably adjust the focal length of Fei Nier lens 5700 or integral lens at maximum performance.

According to illustrated embodiments of the invention, micro-projector 5000 can additionally comprise color filter described herein, and it is placed on the cloche 4200 of LED encapsulation 4000.Alternately, as at this with as described in optical multiplexer and the recover 1000, color filter 4400 can be coated in the input face of light pipe 5100 or hold on 5110.This is preferably such that cloche 4200 is optional, thereby has eliminated another assembly from micro-projector 5000.

Although LED encapsulation 4000 described herein is RGGB LED encapsulation, LED encapsulation 4000 can comprise any M * N array of a plurality of LED 4100 or color LED 4100, and M and N are positive integers.According to illustrated embodiments of the invention, each color LED 4100 can comprise the LED of one or more strategic placements, so that can easily make color filter.That is to say, can be from producing each color near several little LED that place each other.Thereby according to illustrated embodiments of the invention, every group of LED of same color can be regarded as single led.

Should be understood that three (RGBs) that the number of color is not limited to discuss herein.Can use and comprise single color, two colors, three colors or encapsulate and realize micro-projector of the present invention more than the LED of the LED of three colors.

According to illustrated embodiments of the invention, all surface of PBS 5200 is polished.The particular surface of PBS 5200 is used for transmission and total internal reflection (TIR), and other surfaces only are used for TIR.Preferably, these of PBS 5200 only can be coated with reflectance coating so that assembling in the surface of TIR alternatively.

See Figure 20 now, show the figure of PBS 5200, demonstrate the part that LCOS panel 5500 only uses the PBS face from the direction of LCOS panel 5500.All the other that make the PBS face are reflexive or have reflectance coating 5210, to be used to reclaim purpose.

According to illustrated embodiments of the invention, micro-projector 5000 utilizes the LED encapsulation 4000 that only comprises white LEDs 4100 rather than RGGB LED 4100.As a result, can eliminate coating 4400 in the LED encapsulation.Micro-projector 5000 comprises white LEDs 4100, light pipe 5100, PBS 5200.If use standard LCOS panel 5500 shown in Figure 16-19, then output will be the black and white picture that projects on the screen (not shown).Preferably, can use colour element LCOS rather than standard LCOS panel to produce colour pitcture.Can make colour element LCOS with the transparent color filters that is placed on the pixel top, make that one part of pixel is red, one part of pixel is green, and one part of pixel is blue.According to an aspect of the present invention, the part of pixel is not colored, and is considered to white pixel, thereby improves the brightness that shows.Although colour element LCOS has simplified structure, resolution can be littler.For application-specific, if reduced the complicacy of micro-projector, then lower resolution is acceptable, thereby has reduced the cost of micro-projector.

According to illustrated embodiments of the invention, micro-projector 5000 comprise the digital light made from Texas Instrument handle (digital light processing,

) the similar digital mirror device (DMD) 5910 of device.DMD 5910 is preferably mounted in the DMD encapsulation 5900.DMD 5910 has many little mirrors (pixel) that can tilt.When light (a) under the situation of closing in pixel was incident on the DMD5910, light was reflected away from incident direction and away from projecting lens 5600, and will not be projected on the screen (not shown).When pixel was switched on, the mirror of DMD 5910 tilted to incident beam, and the light of reflection is directed to projecting lens 5600 and is projected on the screen.TIR cube prism 5800 comprises two

triangular prisms

5810,5820, and wherein first triangular prism 5810 provides incident beam to DMD 5910, and wherein incident beam is reflected by total internal reflection.Folded light beam from DMD 5910 is not reflected, but by the interface transmission, and be transmitted to second triangular prism 5820.Two

triangular prisms

5810,5820 form parallel interface, so that can distortion from the image of DMD 5910.

All faces of first triangular prism 5810 (and preferably, all faces of second triangular prism 5820) are polished to make it form waveguide.Adjust angle theta (θ) at maximal efficiency.Because the light that is incident on the DMD 5910 has specific digital ring, so the size of TIR prism 5800 is greater than the imaging region of DMD, as shown in figure 21.The light that is directed to TIR prism 5800 in the DMD surface is bigger, and if light be not collected, then normal light will be lost.Therefore, according to illustrated embodiments of the invention, the outer zone of the imaging region on the TIR prism 5800 is coated with reflection configuration 5920.Preferably, reflection configuration 5920 is angled lens array, angled reflector array, angled lens array, grating or Reflex Reflector array, so that the light that is incident on the angle lens array 5920 is reflected back toward the incident direction, shown in the light (b) of Figure 21.Can be with by there being angle lens array 5920 to make angled lens array 5920 in how thick definite interval.Restriction is usually owing to the space between TIR prism 5800 and the DMD encapsulation 5900.The light of reflection finally returns and turns back among the LED 4100 by light pipe 5100.

See Figure 22 (a)-(b) now, show optical multiplexer and recover 6000 according to illustrated embodiments of the invention.Optical multiplexer and recover 6000 comprise light pipe 6100.The cross section of light pipe 6100 can be rectangle, square, circle etc.According to illustrated embodiments of the invention, light pipe 6100 can be in following: the free form light pipe that the light pipe of hollow, solid light pipe, straight light pipe, the cumulative light pipe that attenuates, the light pipe that decrescence attenuates, compound parabolic concentrator, shape are limited by equation or digitally or complete free form light pipe or any suitable combination otherwise determined, and as straight hollow light tube, the cumulative solid light pipe that attenuates.All these various light pipes will be called light pipe 1200 jointly at this.Light pipe any mentioned comprise any light pipe of setting forth or the combination of various light pipes herein.

The coating that is reflected of the top of light pipe 6100, the end and left surface, wherein output terminal 6120 to the right.Shown in Figure 22 (a), basal surface 6130 up has three openings that are used for led chip 6200.Red chip 6200 is placed on red window 6310 places with CR coating, this CR coating transmit red light and reflect green light and blue light.Green chip 6200 is placed on green window 6320 places with CG coating, this CG coating transmit green and reflect red and blue light.Blue chip 6200 is placed on blue window 6330 places with CB coating, this CB coating transmit blue and reflect red and green glow.Owing to can use total internal reflection inherently, so the sidewall of light pipe can apply alternatively.As a result, because red reflex window 6310, so can't see green or blue chip 6200 from the light of red chip 6200.For this also sets up from the light of green and blue chip 6200.

Therefore, each color forms the recovery system of himself, and all colours is mixed and produce multiplexing output 6400 in same light pipe 6100.

Although Figure 22 (a)-(b) shows the configuration of using red, green and blue led chip 6200, general layout can comprise two or more chips with one or more color as shown in figure 23.Use is matched with the corresponding coating of each color of led chip 6200.For example, can use two or more chips 6200 of same colors with the window 6310,6320,6330 of the coating of same type.The relative intensity that depends on the different colours that needs in the application-specific can be used the chip of proper number.Led chip 6200 is illustrated as single led chip 6200 in Figure 22-23, and it can also be made of a plurality of chips of same color, and wherein plurality of chips is got together with array format.Minimum space between these chips is preferred.

According to illustrated embodiments of the invention, as shown in figure 24, optical multiplexer and recover 6000 additionally comprise output reflection aperture output terminal 6120 places, that have the opening that is suitable for application-specific of light pipe 6100, thereby other recovery is provided.Use for polarized light, can add reflective polarizer 6500 and optional wave plate 6600.To being suitable on an equal basis and will no longer setting forth in conjunction with the reflectance coating of other example embodiment elaborations of the present invention or the explanation of aperture, reflective polarizer and optional wave plate at this at this.

According to illustrated embodiments of the invention, as shown in figure 25, optical multiplexer and recover 6000 comprise with reclaim/multiplexing light pipe 6100 is integrated or as the gradually thin light pipe 6700 of light pipe 6700 separately, be used for converting output to desired size and angle.

According to illustrated embodiments of the invention, shown in Figure 26 (a), optical multiplexer and recover or system 6000 use white LEDs 6200, and wherein window 6340 does not have coating.When using monochromatic LED 6200, also can use the clear window 6200 that does not have coating, shown in Figure 26 (a).

According to the embodiment of the invention, shown in Figure 26 (b), can use very approaching two brightness that LED comes increase system 6000 each other of wavelength, this is because they can use coating window 6350,6360 together multiplexing.For example, this embodiment can use with two or more green chips 6200, and wherein its wavelength is enough approaching to be considered to green.

For a person skilled in the art, obviously under the situation that does not break away from the spirit and scope of the present invention, can make amendment to the present invention who has described in many ways.Any and all this modifications should be believed to comprise within the scope of the appended claims.

Claims

1. optical multiplexer and recover comprise:

The LED layer comprises a plurality of LED, each LED emission light output;

Optical layers has input end and output terminal, and the described input end of described optical layers is coupled to described a plurality of LED, with multiplexing light output from described a plurality of LED; And

The aperture layer, be coupled to the described output terminal of described optical layers, and has the part that is used for the output of the multiplexing light of transmission with transmissive apertures that single light output is provided be used for reflecting surface to the remainder of the multiplexing light of the described input end reflection of described optical layers, thereby the remainder of multiplexing light is got back to described a plurality of LED, with the brightness of the light output that increases described a plurality of LED.

2. optical multiplexer according to claim 1 and recover, wherein said optical layers comprises: lens jacket, a part that is used for exporting from the light of described a plurality of LED is transmitted to described aperture layer; And the reflection horizon, the remainder that is used for exporting from the light of described a plurality of LED reflects back into described a plurality of LED to reclaim.

3. optical multiplexer according to claim 1 and recover, wherein said optical layers comprises light pipe, and described light pipe is used for being transmitted to from the part that the light of described a plurality of LED is exported described aperture layer and will reflects back into described a plurality of LED to reclaim from the remainder that the light of described a plurality of LED is exported.

4. optical multiplexer according to claim 1 and recover, wherein said optical layers comprises: lens, a part that is used for exporting from the light of described a plurality of LED is transmitted to described aperture layer; And spherical reflector, the remainder that is used for exporting from the light of described a plurality of LED reflects back into described a plurality of LED to reclaim.

5. optical multiplexer according to claim 3 and recover further comprise the reflection horizon, and described reflection horizon covers described input end except the zone of the described input end of the described a plurality of LED that are coupled, described light pipe.

6. optical multiplexer according to claim 5 and recover, wherein said reflection horizon are the reflectance coatings on described input end except the zone of the described input end of the described a plurality of LED that are coupled, described light pipe.

7. optical multiplexer according to claim 5 and recover further comprise glass plate, and described glass plate optionally is coated with reflectance coating, with covering described input end except that the zone of the described input end of the described a plurality of LED of coupling, described light pipe.

8. optical multiplexer according to claim 1 and recover, wherein said transmissive apertures have the aspect ratio of 16: 9 or 4: 3.

9. optical multiplexer according to claim 1 and recover, wherein with the described a plurality of LED of M * N arranged in arrays, wherein M and N are positive integers.

10. optical multiplexer according to claim 1 and recover further comprise the heating radiator that is used to install described a plurality of LED.

11. optical multiplexer according to claim 1 and recover, wherein said a plurality of LED comprise a plurality of color LED chips.

12. optical multiplexer according to claim 11 and recover, wherein said a plurality of color LED chips comprise a plurality of green led chips, red led chip and blue led chip.

13. optical multiplexer according to claim 11 and recover, further comprise the color-filter layer that covers described LED layer, the light of the color that the feasible described color LED chip of regional transmission that covers the described color-filter layer of color LED chip is launched, and reflect the light of every other color.

14. optical multiplexer according to claim 3 and recover, wherein said light pipe are in following at least one: the light pipe of hollow, solid light pipe, straight light pipe, the cumulative light pipe that attenuates, the light pipe that decrescence attenuates, compound parabolic concentrator and free form light pipe.

15. optical multiplexer according to claim 1 and recover, wherein said transmissive apertures has reflectance coating, and the light of described reflectance coating transmission predetermined color also reflects the light of every other color.

16. optical multiplexer according to claim 1 and recover, further comprise colour wheel, described colour wheel comprises a plurality of color filters that cover described transmissive apertures, and described transmissive apertures is used to depend on which color filter of described colour wheel covers described transmissive apertures and the light of transmission different colours optionally.

17. optical multiplexer according to claim 1 and recover, further comprise the reflecting polarizing layer that covers described transmissive apertures, be used for the described single light output of transmission predetermined polarisation and the described single light output of reflecting every other polarization to the described input end of described optical layers, thereby the untapped polarization recovery of light is got back to described a plurality of LED, with the brightness of the light output that increases described a plurality of LED.

18. optical multiplexer according to claim 17 and recover further comprise wave plate, the described predetermined polarisation that described wave plate is used to rotate the polarization state of single light output and the described untapped optical rotation of light is changed into light.

19. optical multiplexer according to claim 15 and recover, further comprise the reflecting polarizing layer that covers described transmissive apertures, be used for the described single light output of transmission predetermined polarisation and the described single light output of reflecting every other polarization to the described input end of described optical layers, thereby the untapped polarization recovery of light is got back to described a plurality of LED, with the brightness of the light output that increases described a plurality of LED.

20. optical multiplexer according to claim 19 and recover further comprise wave plate, the described predetermined polarisation that described wave plate is used to rotate the polarization state of single light output and the described untapped optical rotation of light is changed into light.

21. optical multiplexer according to claim 12 and recover, further comprise the color-filter layer that covers described LED layer, so that cover described green led chip described color-filter layer regional transmit green and reflect the light of every other color, cover described blue led chip described color-filter layer regional transmit blue and reflect the light of every other color, and cover described red chip described color-filter layer regional transmit red light and reflect the light of every other color.

22. optical multiplexer according to claim 18 and recover further comprise projecting lens, described projecting lens is used to catch the described light output of described predetermined polarisation so that micro-projector to be provided.

23. optical multiplexer according to claim 1 and recover, wherein said LED layer is mounted in the LED wafer on the radiator layer.

24. optical multiplexer according to claim 23 and recover further comprise the color fluorescence thing, described color fluorescence thing is deposited on the described LED wafer, so that described a plurality of LED of different colours to be provided.

25. optical multiplexer according to claim 24 and recover, further comprise the color-filter layer that covers described LED wafer so that cover described each LED emission of the regional transmission of described color-filter layer of each LED color light and reflect the light of every other color.

26. optical multiplexer according to claim 25 and recover, wherein said optical layers comprises: lens jacket, and a part that is used for exporting from the light of described a plurality of LED is transmitted to described aperture layer; And the reflection horizon, be used for reflecting back into described a plurality of LED reclaiming, thereby wafer scale LED is provided the array of illuminator from the remainder of the light of described a plurality of LED output.

27. optical multiplexer according to claim 26 and recover, the array of wherein said wafer scale LED illuminator is cut into independent part, so that the wafer scale LED illuminator of a plurality of separation to be provided.

28. optical multiplexer according to claim 26 and recover, further comprise the reflecting polarizing layer that covers described transmissive apertures, be used for the described single light output of transmission predetermined polarisation and the described single light output of reflecting every other polarization to the described input end of described optical layers, thereby the untapped polarization recovery of light is got back to described a plurality of LED, with the brightness of the light output that increases described a plurality of LED.

29. optical multiplexer according to claim 28 and recover further comprise wave plate, the described predetermined polarisation that described wave plate is used to rotate the polarization state of single light output and the described untapped optical rotation of light is changed into light.

30. optical multiplexer according to claim 28 and recover further are included in the layer and the projecting lens layer on the layer of described display panel of the display panel on the described reflecting polarizing layer, thereby the array of wafer scale projector system is provided.

31. optical multiplexer according to claim 30 and recover, the layer of wherein said display panel comprises that transflective liquid crystal shows the layer of LCD panel.

32. optical multiplexer according to claim 31 and recover, wherein said color fluorescence thing comprise that white fluorescence is to provide a plurality of White LEDs.

33. optical multiplexer according to claim 31 and recover, wherein said color fluorescence thing comprises the red, green and blue fluorescence, so that a plurality of red, green and blue look LED to be provided.

34. optical multiplexer according to claim 33 and recover, the array of wherein said wafer scale LED projector system is cut into independent part, so that the wafer scale projector system of a plurality of separation to be provided.

35. optical multiplexer according to claim 25 and recover, wherein said optical layers comprises: lens, and a part that is used for exporting from the light of described a plurality of LED is transmitted to described aperture layer; And spherical reflector, be used for reflecting back into described a plurality of LED reclaiming, thereby the array of wafer scale illuminator is provided from the remainder of the light of described a plurality of LED output.

36. optical multiplexer according to claim 25 and recover, wherein said optical layers comprises light pipe, the part that described light pipe is used for exporting from the light of described a plurality of LED is transmitted to described aperture layer, and will reflect back into described a plurality of LED from the remainder of the light of described a plurality of LED output reclaiming, thereby provide the array of wafer scale illuminator.

37. optical multiplexer according to claim 36 and recover, the array of wherein said wafer scale illuminator is cut into independent part, so that the wafer scale illuminator of a plurality of separation to be provided.

38. optical multiplexer according to claim 36 and recover, further comprise the reflecting polarizing layer that covers described transmissive apertures, be used for the described single light output of transmission predetermined polarisation and the described single light output of reflecting every other polarization to the described input end of described optical layers, thereby the untapped polarization recovery of light is got back to described a plurality of LED, with the brightness of the light output that increases described a plurality of LED.

39. according to described optical multiplexer of claim 38 and recover, further comprise wave plate, the described predetermined polarisation that described wave plate is used to rotate the polarization state of single light output and the described untapped optical rotation of light is changed into light.

40. according to described optical multiplexer of claim 38 and recover, further comprise the layer of display panel on the described reflecting polarizing layer and described display panel layer on the projecting lens layer, thereby the array of wafer scale projector system is provided.

41. according to described optical multiplexer of claim 40 and recover, the layer of wherein said display panel comprises that transflective liquid crystal shows the layer of LCD panel.

42. according to described optical multiplexer of claim 41 and recover, wherein said color fluorescence thing comprises that white fluorescence is to provide a plurality of White LEDs.

43. according to described optical multiplexer of claim 41 and recover, wherein said color fluorescence thing comprises the red, green and blue fluorescence, so that a plurality of red, green and blue look LED to be provided.

44. according to described optical multiplexer of claim 43 and recover, the array of wherein said wafer scale LED projector system is cut into independent part, so that the wafer scale projector system of a plurality of separation to be provided.

45. optical multiplexer according to claim 3 and recover, wherein said aperture layer are the reflectance coatings on the described output terminal of described light pipe.

46. optical multiplexer according to claim 3 and recover, wherein said aperture layer is a glass plate, and described glass plate optionally is coated with reflectance coating, to cover the described output terminal of described light pipe.

47. a micro-projector comprises:

The LED layer comprises the LED that emission light is exported;

Light pipe has input end and output terminal, and the described input end of described light pipe is coupled to LED;

The aperture layer, be coupled to the described output terminal of described light pipe, and have the transmissive apertures of a part that is used for transmitted light output and reflect the reflecting surface of the remainder of described light output to the described input end of described light pipe, thereby the remainder of described light output is got back to described LED, the brightness of exporting with the light that increases described LED;

Reflective polarizer, be arranged between described light pipe and the described aperture layer, be used for the described light output of transmission predetermined polarisation and reflect other polarizations of described light output, thereby the not use polarization recovery of described light output is got back to described LED, with the brightness of the described light output that increases described LED;

Liquid crystal on silicon LCOS panel is used to receive and reflects the described light output of predetermined polarisation, and the size of wherein said transmissive apertures is matched with the size of described LCOS panel basically, makes the face of described PBS of the described LCOS panel of coupling greater than described LCOS panel; And

Projecting lens is used for catching the described light output of described predetermined polarisation with projected image from described LCOS panel.

48. according to the described micro-projector of claim 47, wherein said light pipe is at least one in following: straight light pipe, the light pipe of hollow, solid light pipe, the cumulative light pipe that attenuates, the light pipe that decrescence attenuates, compound parabolic concentrator and free form light pipe.

49. according to the described micro-projector of claim 47, further comprise wave plate, described wave plate is used to rotate the polarization state of described light output and with the described described predetermined polarisation of not using optical rotation to change light into of the light of described reflective polariser reflects.

50. according to the described micro-projector of claim 47, wherein said aperture layer is polarization beam splitter PBS, its all surface is polished so that total internal reflection to be provided, and makes described PBS as waveguide; And the mask of the described PBS of the described light pipe that wherein is coupled has the size of the described output terminal that is substantially equal to described light pipe.

51. according to the described micro-projector of claim 47, the described output terminal of wherein said LCOS panel and described light pipe is relatively arranged or is vertically arranged with described light pipe.

52. according to the described micro-projector of claim 50, the described output terminal of wherein said light pipe has convex surfaces and forms integral lens.

53., further comprise the Fresnel Lenses that is arranged between described light pipe and the described PBS according to the described micro-projector of claim 50.

54. according to the described micro-projector of claim 47, wherein said LED is a White LED; And wherein said LCOS panel is colour element LCOS.

55. according to the described micro-projector of claim 54, wherein said colour element LCOS comprises transparent color filters, so that a plurality of red, green and blue pixels to be provided.

56. according to the described micro-projector of claim 47, wherein said LED layer is the LED encapsulation that comprises the array of color LED; And the reflection horizon that further comprises the array that covers described color LED.

57. according to the described micro-projector of claim 56, wherein said reflection horizon is coated with double-colored coating, make to cover the light of color of the described color LED emission of regional transmission in the described reflection horizon of color LED, and the light of every other color is reflected back into described color LED to reclaim.

58. according to the described micro-projector of claim 56, wherein said reflection horizon is the double-colored coating on the described input end of described light pipe, make the light of color of the described color LED emission of regional transmission in the described reflection horizon on the described input end of the described light pipe be coupled to color LED, and the light of every other color is reflected back into described color LED to reclaim.

59. according to the described micro-projector of claim 56, wherein said LED encapsulation comprises the array of indigo plant, green and red LED.

60. according to the described micro-projector of claim 59, wherein said LED encapsulation comprises the array of at least one red LED, a blue LED and a red LED.

61. according to the described micro-projector of claim 60, wherein said LED encapsulation comprises the array of at least one red LED, a blue LED and two green LED.

62. according to the described micro-projector of claim 47, wherein said LED comprises the set of the LED of same color closely packaging together.

63. a micro-projector comprises:

The LED layer comprises the LED that emission light is exported;

Polarization beam splitter PBS, all surface is polished so that total internal reflection to be provided, make described PBS as waveguide, described PBS is coupled to the described output terminal of described light pipe and has transmissive apertures, and the mask of the described PBS of the described light pipe that wherein is coupled has the size of the described output terminal that is substantially equal to described light pipe;

Liquid crystal on silicon LCOS panel is used to receive and reflects the described light output of predetermined polarisation, and the size of wherein said transmissive apertures is matched with the size of described LCOS panel basically, so that the face of the described PBS of the described LCOS panel that is coupled is greater than described LCOS panel; And

Projecting lens is coupled to the face of described PBS, catching the described light output of described predetermined polarisation from described LCOS panel, thus projected image; And

Wherein except the face of be coupled described projecting lens and described transmissive apertures, all masks of described PBS have reflectance coating, with a part by the described light output of described transmissive apertures transmission, and described LED is got back in the remainder reflection and the recovery of the output of described light, with the brightness of the light output that increases described LED.

64. according to the described micro-projector of claim 63, wherein said light pipe is at least one in following: straight light pipe, the light pipe of hollow, solid light pipe, the cumulative light pipe that attenuates, the light pipe that decrescence attenuates, compound parabolic concentrator and free form light pipe.

65. according to the described micro-projector of claim 63, further comprise the wave plate that is arranged between described light pipe and the described PBS, be used to rotate the polarization state of described light output and the described described predetermined polarisation of not using optical rotation to change light into of the light of described reflective polariser reflects.

66. according to the described micro-projector of claim 63, the described output terminal of wherein said LCOS panel and described light pipe is relatively arranged or is vertically arranged with described light pipe.

67. according to the described micro-projector of claim 63, the described output terminal of wherein said light pipe has convex surfaces and forms integral lens.

68., further comprise the Fresnel Lenses that is arranged between described light pipe and the described PBS according to the described micro-projector of claim 63.

69. according to the described micro-projector of claim 63, wherein said LED is a White LED; And wherein said LCOS panel is colour element LCOS.

70. according to the described micro-projector of claim 69, wherein said colour element LCOS comprises transparent color filters, so that a plurality of red, green and blue pixels to be provided.

71. according to the described micro-projector of claim 63, wherein said LED layer is the LED encapsulation that comprises the array of color LED; And the reflection horizon that further comprises the array that covers described color LED.

72. according to the described micro-projector of claim 71, wherein said reflection horizon is coated with double-colored coating, so that cover the light of color of the described color LED emission of regional transmission in the described reflection horizon of color LED, and the light of every other color is reflected back into described color LED to reclaim.

73. according to the described micro-projector of claim 71, wherein said reflection horizon is the double-colored coating on the described input end of described light pipe, make the light of color of the described color LED emission of regional transmission in the described reflection horizon on the described input end of the described light pipe be coupled to color LED, and the light of every other color is reflected back into described color LED to reclaim.

74. according to the described micro-projector of claim 71, wherein said LED encapsulation comprises the array of indigo plant, green and red LED.

75. according to the described micro-projector of claim 74, wherein said LED encapsulation comprises the array of at least one red LED, a blue LED and a red LED.

76. according to the described micro-projector of claim 75, wherein said LED encapsulation comprises the array of at least one red LED, a blue LED and two green LED.

77. according to the described micro-projector of claim 63, wherein said LED comprises the set of the LED of same color closely packaging together.

78. a micro-projector comprises:

The LED layer comprises the LED that emission light is exported;

Total internal reflection TIR cube prism comprises first and second triangular prisms, and all faces of described first and second triangular prisms are polished to form waveguide;

Digital mirror device DMD, the a plurality of tiltable mirrors of face that comprise described first triangular prism that is coupled to described TIR cube prism are to provide imaging region, described of described first triangular prism greater than described imaging region, and the light of described light output is incident on the described DMD;

Reflection configuration, cover described of the outer described triangular prism of described imaging region, get back to described LED with the light that will be incident on the described light output on the described reflection configuration, the remainder reflection and the recovery of described light output, with the brightness of the light output that increases described LED; And

Projecting lens is coupled to the face of described second triangular prism, is used for when the described tiltable mirror of described DMD is switched on, thereby catches from the described light projected image of the light of described DMD reflection.

79. according to the described micro-projector of claim 78, wherein said light pipe is at least one in following: straight light pipe, the light pipe of hollow, solid light pipe, the cumulative light pipe that attenuates, the light pipe that decrescence attenuates, compound parabolic concentrator and free form light pipe.

80. according to the described micro-projector of claim 78, the space between wherein said light pipe, described TIR cube prism, described DMD and the described projecting lens is filled with clearance or low index glue.

81. according to the described micro-projector of claim 78, wherein said reflection configuration is in following: angled reflector array, angled lens array, grating or Reflex Reflector array.

82. according to the described micro-projector of claim 78, wherein said LED layer is the LED encapsulation that comprises the array of color LED; And the reflection horizon that further comprises the array that covers described color LED.

83. according to the described micro-projector of claim 78, wherein said reflection horizon is coated with double-colored coating, make to cover the light of color of the described color LED emission of regional transmission in the described reflection horizon of color LED, and the light of every other color is reflected back into described color LED to reclaim.

84. according to the described micro-projector of claim 78, wherein said reflection horizon is the double-colored coating on the described input end of described light pipe, make the light of color of the described color LED emission of regional transmission in the described reflection horizon on the described input end of the described light pipe be coupled to color LED, and the light of every other color is reflected back into described color LED to reclaim.

85. according to the described micro-projector of claim 78, wherein said LED encapsulation comprises the array of indigo plant, green and red LED.

86. 5 described micro-projectors according to Claim 8, wherein said LED encapsulation comprises the array of at least one red LED, a blue LED and a red LED.

87. 6 described micro-projectors according to Claim 8, wherein said LED encapsulation comprises the array of at least one red LED, a blue LED and two green LED.

88. according to the described micro-projector of claim 78, wherein said LED comprises the set of the LED of same color closely packaging together.

89. optical multiplexer and recover comprise:

The light genetic horizon is used for launching light and have reflecting surface by light source excitation the time;

Light pipe has input end and output terminal, and the described input end of described light pipe is coupled to described smooth genetic horizon, thereby provides light output with multiplexing described light from described smooth genetic horizon; And

The aperture layer, be coupled to the described output terminal of described light pipe, and have the transmissive apertures of a part that is used for the output of the described light of transmission and be used for reflecting to described smooth genetic horizon the reflecting surface of the remainder of described light output, this light genetic horizon is with the described remainder reflection of light output and get back to described transmissive apertures.

90. 9 described optical multiplexer and recovers according to Claim 8, wherein said smooth genetic horizon comprises one or more compositions, has the described light of a plurality of wavelength or color with emission.

91. according to described optical multiplexer of claim 90 and recover, wherein said one or more compositions are scattered on the space in described smooth genetic horizon and make each zones of different of described smooth genetic horizon launch the described light of different colours.

92. 9 described optical multiplexer and recovers according to Claim 8, wherein being used for encouraging the described light source of described smooth genetic horizon is following one: arc lamp, LED or laser instrument.

93. 9 described optical multiplexer and recovers according to Claim 8, the light of wherein said light emitted first wavelength, and described smooth genetic horizon launches the light of second wavelength, and described second wavelength of described first wavelength ratio is short.

94. 9 described optical multiplexer and recovers according to Claim 8, the light of wherein said light emitted first wavelength, and described smooth genetic horizon launches the light of second wavelength, and described second wavelength of described first wavelength ratio is longer.

95. 9 described optical multiplexer and recovers according to Claim 8, wherein said smooth genetic horizon is coated on the described input end of described light pipe.

96. 9 described optical multiplexer and recovers further comprise the glass plate of arranging with the described input end of described light pipe according to Claim 8 contiguously, described smooth genetic horizon is applied on the described glass plate.

97. 9 described optical multiplexer and recovers according to Claim 8, wherein said smooth genetic horizon Bei overlays on the described light source.

98. 9 described optical multiplexer and recovers further comprise the chamber that is formed by relative reflection horizon according to Claim 8, holding described smooth genetic horizon, thereby reduce the angular distribution of the described light of described smooth genetic horizon emission.

99. 9 described optical multiplexer and recovers further comprise the chamber that is formed by relative reflection horizon according to Claim 8, holding described smooth genetic horizon and described light source, thereby reduce the angular distribution of the described light of described smooth genetic horizon emission.

100. according to described optical multiplexer of claim 92 and recover, wherein said laser instrument is a diode laser.

101. according to described optical multiplexer of claim 100 and recover, wherein said smooth genetic horizon comprises the red, green and blue light generating material by described diode laser excitation.

102. according to described optical multiplexer of claim 100 and recover, wherein said smooth genetic horizon comprises red, green and blue light generating material, each light generating material is by at least one diode laser excitation.

103. 9 described optical multiplexer and recovers according to Claim 8, wherein said smooth genetic horizon is coated, also reflect from the described light of described smooth genetic horizon emission with the light of transmission, thereby make described smooth genetic horizon at a direction emission light from described light source.

104., further comprise three cube prism according to described optical multiplexer of claim 103 and recover; And wherein said smooth genetic horizon comprises the red, green and blue light generating material that is used for launching respectively red, green and blue light, each light generating material is by at least one diode laser excitation and be coupled to different cube prism, described red, green and blue light is multiplexed into red single light output.