TWM547687U - Projector - Google Patents

Abstract

The present invention discloses a projector, more specifically, a projector for a dual light valve architecture, which includes a light source, a phosphor wheel, a fly-eye lens, a dichroic filter, and a plurality of light valves. The light source outputs a first illumination light, portion of the first illumination light is excited to output second illumination light of different wavelengths through a region of the phosphor wheel, and the portion of the first illumination light continues to advance via another region of the phosphor wheel. And then the first illumination light and the second illumination light are passed through the fly-eye lens and then divided by a dichroic filter, meanwhile, the second illumination light is divided into two different colors of light, one of which enters the first light valve, and the other enters the second light valve together with the first illumination light, and the first light valve and the second light valve respectively convert the illumination light of different colors into image light beam of different colors. Subsequently, the image light beam of each light valve will pass through a combiner and be outputted to the projection lens, for projecting an image on a surface.

Description

Projector

This creation is related to a projector, and in particular to a projector with a dual light valve architecture.

The development of science and technology has promoted the progress of the times, and because the needs of consumers have changed greatly, the projectors on the market continue to innovate. In digital projectors, the use of light valves can convert illumination light into image light, and digital projector products generally use different light valve configurations as a way to distinguish projectors. According to the type of light valve, the main technology can be divided into LCD, DLP and LCOS. In response to the increase in consumer demand for brightness, operators have begun to use multiple light valve structures to simultaneously provide images of multiple wavelengths to increase the overall brightness of the projector.

Among them, the design of the double light valve can achieve better brightness, but without the difficulty of designing and producing the three-light valve, it is a worthy effort.

One embodiment of the present invention provides a projector including a light source, a lens group, a beam splitting element, a lens group, a fluorescent wheel, a lens group, a mirror group, a fly-eye lens, and a lens group. The light source can output a first color light beam; the fluorescent wheel is provided with a first area and a second area, and the first area can be Receiving a first color beam and exciting a second color beam, the first color beam may continue the optical path through the second region; the fly eye lens is disposed on the traveling path of the first color beam and the second color beam; The light splitting component is disposed on the travel path of the first color light beam and the second color light beam, and the light splitting component converts and outputs the second color light beam into a third color light beam and a fourth color light beam different in optical path; the first light valve is disposed on The first color beam and the third color beam are converted into the first image beam in the path of the first color beam and the third color beam; and the second light valve is disposed on the traveling path of the fourth color beam, Converting the fourth color beam into a second image beam; and the combining optical element can combine the first image beam and the second image beam; wherein, the color of the first color beam, the color of the second color beam, and the third color light The color and the color of the fourth color beam are different.

According to another aspect of the present invention, there is provided a projector comprising a first spatial light modulator comprising a light source, a fluorescent wheel, a first beam splitting element, a second beam splitting element, a fly-eye lens, a first spatial light modulation A combination of components such as a second spatial light modulator and a third beam splitter.

The light source can output a first color light beam; in addition, the fluorescent wheel has a phosphor layer region and an optical action region, and the phosphor layer region can receive the first color beam and output a second color beam, and the optical active region can be The first color beam is transmitted or reflected and exits the fluorescent wheel. The first beam splitting element is disposed on the travel path of the first color light beam and the second color light beam, and the first light splitting component can reflect a portion of the second color light beam to form a third light beam, and can make the second color light beam another A portion penetrates to form a fourth beam. The second beam splitting element is disposed on the travel path of the first color light beam and the second color light beam, and the second light splitting element can reflect either of the first color light beam and the second color light beam, and can pass the other. The compound eye lens is disposed on the first color beam and the second color light The traveling path of the beam is disposed between the optical paths of the first beam splitting element and the second beam splitting element. The first spatial light modulator can receive the first beam and the third beam and convert to the first image beam. The second spatial light modulator can receive the fourth light beam and convert it into a second image light beam. The third beam splitting element is disposed on the optical path of the first image beam and the second image beam, and can reflect any one of the first image beam and the second image beam, and can pass the other.

According to another aspect of the present invention, there is provided a projector comprising a first spatial light modulator comprising a light source, a fluorescent wheel, a first beam splitting element, a second beam splitting element, a fly-eye lens, a first spatial light modulation A combination of components such as a second spatial light modulator and a third beam splitter. The light source can output a one-color beam. The fluorescent wheel may be provided with a first area and a second area, the first area may receive the first color beam and excite the output dichroic beam, and the first color beam may continue the optical path via the second area. The first beam splitting element may be disposed on a travel path of the first color light beam and the second color light beam, and the first light splitting element may convert and output the second color light beam into a three color light beam and a four color light beam with different optical paths. A fly-eye lens can be disposed on the progress path of the first color beam and the third color beam. The second fly-eye lens may be disposed on a travel path of the fourth beam. The light valve can be disposed on the travel path of the first color light beam and the third color light beam, and can convert the first color light beam and the third color light beam into the first image light beam. The second light valve can be disposed on the traveling path of the fourth color light beam, and can convert the fourth color light beam into the second image light beam. And a light combining optical element can combine the first image beam and the second image beam. The color of the first color beam, the color of the second color beam, the color of the third color light, and the color of the fourth color beam are different.

Compared with the single light valve structure, the creation of the dual light valve design can effectively improve the overall brightness. With the use of fly-eye lenses, the overall space requirements of the system are reduced and Reducing the number of lenses required makes the system smaller. Compared with the three-light valve architecture, the design is difficult to design and produce, and the brightness can be close to the three-light valve architecture. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. For example, a lens or other optical element for adjusting the light type is disposed between the optical elements, or, for example, in the first embodiment, the fluorescent wheel used can reflect blue light and yellow light according to different timings, and the subsequent reflection is omitted. Mirror sets and so on. In addition, the above described features and advantages of the present invention will become more apparent and understood.

10‧‧‧Lighting device

110‧‧‧Light source

111‧‧‧Laser Diode Package

111A‧‧‧microlens

120‧‧‧ lens group

121‧‧‧ lens

122‧‧‧ lens

130‧‧‧Spectral components

140‧‧‧ lens group

150‧‧‧ fluorescent wheel

150A‧‧‧Flame powder zone

150B‧‧‧Optical area

160‧‧‧ lens group

170‧‧‧Mirror group

171‧‧‧Mirror

172‧‧‧Mirror

173‧‧‧Mirror

174‧‧‧ lens group

180‧‧‧Future eye lens

190‧‧‧ lens group

20‧‧‧ imaging device

210‧‧‧ Total internal reflection components

220‧‧‧Spectral components

221‧‧‧wavelength selection interface

230‧‧‧Space light modulator

240‧‧‧Space light modulator

30‧‧‧Projection lens

410‧‧‧Spectral components

420‧‧‧稜鏡

430‧‧‧Light valve

440‧‧‧稜鏡

450‧‧‧Light valve

460‧‧‧Finishing optics

470‧‧‧ lens group

480‧‧‧ lens group

491‧‧‧Future eye lens

492‧‧‧Future eye lens

Figure 1 is a schematic view of a projector of the first embodiment of the present invention.

Figure 2 is a schematic view of the projector of the second embodiment of the present invention.

Figure 3 is a schematic view of a projector of a third embodiment of the present invention.

Figure 4 is a schematic view of a projector of a fourth embodiment of the present invention.

The foregoing and other technical aspects, features, and advantages of the present invention will be apparent from the following detailed description of the embodiments of the invention. In addition, the terms "first" and "second" used in the following embodiments are used to identify the same or similar elements, and are not intended to limit the elements. In addition, the following embodiments only provide further explanation for the projector. Those skilled in the art can apply this connection system to any desired situation according to actual needs.

The term "optical component" as used in this creation refers to a component that has some or all of the material that can be reflected or penetrated, and usually consists of glass or plastic. The so-called merging of the present invention means that more than one beam can be combined and output as a beam. The so-called lens of the present invention means that at least part of the light is allowed to penetrate, and the radius of curvature of at least one of the in-and-out light-emitting surfaces is not infinite; in other words, at least one of the entrance and exit surfaces of the lens is required. Not a plane. For example, flat glass is not the lens referred to in this creation.

1 is a schematic view showing a projector of a first embodiment of the present creation. Referring to FIG. 1, it can be seen that the projector mainly includes an illumination device, an imaging device, and a projection lens.

The design of the lighting device will be described below. In the embodiment, the illuminating device 10 includes a light source 110, a lens group 120, a beam splitting element 130, a lens group 140, a fluorescent wheel 150, a lens group 160, a mirror group 170, and a fly-eye lens according to the traveling direction of the light. 180. Lens group 190. The imaging device 20 includes a total internal reflection element 210, a beam splitting element 220, and two spatial light modulators 230, 240. The lens 30 includes a plurality of lenses and an aperture.

The light source 110 of the present invention may be a light emitting diode chip, a laser diode chip, a package of the above two kinds of wafers or other light sources that can provide illumination light. In this embodiment, the light source 110 is a laser diode matrix, and the laser diode matrix includes a plurality of laser diode packages 111 that emit blue light. Each of the laser diode packages includes a laser diode chip, an optical colloid, and a microlens 111A above the wafer. The microlens 111A is used to adjust the light pattern of the corresponding laser package 111. . In addition, the aforementioned blue light refers to a light beam having a spectrum, and the peak wavelength (WP) in the spectrum is between 400 and 470, and the light beam is substantially blue. In the present embodiment, the aforementioned blue light is the first color light beam L1.

The lens group 120 of the present invention is composed of one or more lenses. In addition to the lens, other non-lens elements are also included in lens group 120. In the present embodiment, the lens group 120 includes two lenses, and the diopter of each lens is positive and negative depending on the order in which the light travels. The first lens 121 has a positive diopter and is mainly used for light collection. The second lens 122 has a negative total diopter and is mainly used for collimation of light, so it can be regarded as a collimating lens.

The splitting element 130 of the present invention refers to a bandpass filter, a bandstop filter, a Dichroic filter, a dichroic mirror, and a color separation. Any of the elements (Dichroic prism), X-type combination filter (X Plate), X-type X-ray (X Prism), or the like, or at least one of the foregoing, and combinations thereof. In this embodiment, the filter is a Dichroic filter that reflects light of a specified wavelength to allow light of another wavelength range to penetrate. In the present embodiment, the beam splitting element 130 reflects blue light and allows yellow light to pass through. In another embodiment, the beam splitting element 130 may also reflect yellow light and allow blue light to penetrate. In the embodiment, the yellow light referred to above is the second color light beam L2.

The lens group 140 of the present invention is composed of one or more lenses. In addition to the lens, other non-lens elements are also included in lens group 120. In the present embodiment, the total diopter of the lens group 140 is positive, and includes two lenses for concentrating light onto the surface of the fluorescent wheel.

The fluorescent wheel 150 of the present invention refers to a wheel-shaped optical element having a surface on which a phosphor layer is provided and rotatable. The fluorescent wheel 150 can be transmissive, reflective or a mixture of the two. The transmissive fluorescent wheel 150 means that after the phosphor powder on the surface thereof is excited to output the excited light, at least part of the excited light passes through the fluorescent wheel 150 and is output through the opposite surface of the light incident surface, that is, the light entering direction and The direction of light is the same. In the reflective fluorescent wheel 150, the excited light is reflected by the reflective layer of the fluorescent wheel 150, and the light is output in the opposite direction of the incoming light direction. In the present embodiment, the fluorescent wheel 150 is a partially penetrating, partially reflective fluorescent wheel 150. In the embodiment, the fluorescent wheel 150 further includes a motor 151 and a substrate connected to the motor 151. The axis of the motor 151 is engaged with the center of the circular substrate and is interlocked, and the motor 151 The shaft is rotated to drive the substrate to rotate. A phosphor layer region 150A and an optically active region 150B are disposed on the substrate, and the phosphor layer region 150A and the optically active region 150B are combined into a substantially annular shape. A phosphor powder layer and a reflective layer are disposed on the surface of the phosphor layer region 150A on the substrate, and the substrate is connected to the phosphor layer through a reflective layer, and the phosphor layer includes at least partially transparent light. A mixture of toner and colloid that is allowed to excite a short wavelength of light and emit a long wavelength of light. The reflective layer includes a reflective film, such as a silver film or an aluminum film, to reflect light. In addition, in the present embodiment, the substrate of the optically active region 150B is at least partially transparent, allowing light of a specific wavelength or characteristic to penetrate. In this embodiment, the phosphor layer on the surface of the phosphor layer region 150A can receive blue light and be excited to emit yellow light, and the reflective layer is a silver film. On the other hand, the substrate of the optically active region 150B is transparent, allowing light of any wavelength to pass. It should be noted that, in the optically active region 150B, except that the substrate is made of a transparent material as a transparent region, the substrate may also omit the transparent material, and the light is directly passed through the air through the opening or the gap in the original position of the transparent material. Also. Incidentally, in the transmissive fluorescent wheel 150, the fluorescent powder layer region 150A will not include a reflective layer, and the substrate is at least partially transparent to allow the excited light to pass. Further, in the reflective fluorescent wheel 150, the aforementioned optically active region 150B may be of a transparent design as described above, or may be of a design of the aforementioned reflective layer. That is, in other words, depending on the structure of the fluorescent wheel, the first color beam of blue light may penetrate the optically active region 150B or be reflected by the optically active region 150B and exit the fluorescent wheel 150.

The lens group 160 of the present invention includes one or more lenses. In addition to the lens, other non-lens elements are also included in lens group 160. In the present embodiment, the total diopter of the lens group 160 is positive, and includes two lenses 161, 162 for collimating the light.

The mirror set 170 of the present creation includes more than two mirrors. In this embodiment, the mirror group 170 sequentially includes a first mirror 171, a second mirror 172, a lens 174, and a third mirror 173 according to the traveling path of the light. First mirror 171, second mirror 172, and third mirror 173 is a mirror and has no wavelength selection function. The angle between the first mirror 171 and the second mirror 172 is about ninety degrees, and the angle between the second mirror 172 and the third mirror 173 is also ninety degrees. In practical applications, a lens is disposed between the optical paths of the mirrors. In the embodiment, a lens 174 is disposed between the optical paths of the second mirror 172 and the third mirror 174 for maintaining The collimation state of the light.

The surface of the artificial eye lens (FLY-EYE) 180 of the present invention is provided with a plurality of optical structures arranged in a matrix. Since the fly-eye lens has been widely used, the structure thereof will be simply described. According to the material, the material of the fly-eye lens can be made of plastic or glass. According to the process design, the fly-eye lens can be in the form of a single component (ONE PIECE FORMED) or a combination of multiple optical components. In the present embodiment, the fly-eye lens is formed by glass molding (MOLDING) and is in the form of a single component for uniformizing light.

The lens group 190 of the present creation includes one or more lenses. In addition to the lens, other non-lens elements are also included in lens group 190. In the present embodiment, the lens group 190 includes a lens 191 having a positive diopter.

The so-called total reflection optical element 210 of the present invention refers to an optical element that performs total optical path adjustment using total reflection. In the embodiment, it refers to a TIR PRISM group or a reverse total reflection 稜鏡 (RTIR). The PRISM) group is either a combination or a modification of the aforementioned two elements. In the present embodiment, the total reflection optical element 210 is a total reflection group. It should be noted that a single set of turns may be composed of a plurality of independently arranged and unconnected turns. In the embodiment, in order to create a total reflection surface, an air may be selectively disposed between the turns. Void.

The so-called splitting element 220 of the present invention refers to a bandpass filter, a bandstop filter, a Dichroic filter, a dichroic mirror, and a color separation. (Dichroic prism), X-type X-ray filter (X Plate), X-type X-ray (X Prism), etc., optical components that allow light of specific optical characteristics to penetrate or reflect, or At least one of the foregoing and combinations thereof. In this embodiment, the filter is a Dichroic prism. The wavelength selection interface 221 of the color separation 可 reflects light of a specified wavelength to allow light of another wavelength range to penetrate. In the present embodiment, the wavelength selection interface 221 allows the wavelengths of the blue and red light to be reflected and allows the green wavelength to pass. In another embodiment, the filter can also reflect the wavelength corresponding to the red light and allow the light of the blue and green wavelengths to pass. In another case, the characteristics of the filter for red and green light can be reversed from the previous example. This creation does not limit this.

The so-called spatial light modulator 230, 240 (Spatial Light Modulator, SLM) of this creation contains a plurality of independent units which are spatially arranged in a one-dimensional or two-dimensional array. Each unit can independently control optical signals or electrical signals, and use various physical effects (Pockels effect, Kerr effect, acousto-optic effect, magneto-optic effect, self-electrooptic effect of semiconductor, photorefractive effect, etc.) to change itself. The optical characteristics of the illumination illuminate the illumination light of the plurality of independent units and output the image light. In the embodiment, the spatial light modulator referred to in the present invention is any one of a digital microlens array wafer (DMD), a liquid crystal panel (LCD), and a germanium-based liquid crystal panel (LCOS). Any of a digital microlens array (DMD), a liquid crystal panel (LCD), and a germanium-based liquid crystal panel (LCOS) can be used as a light valve to convert illumination light into image light. In the present embodiment, the spatial light modulator 230 is a digital micro mirror element (DMD) and is used as a light valve to convert illumination light into image light. That is, in the present embodiment, the so-called independent unit in the spatial light modulator 230 refers to each of the micro mirrors on the surface thereof, and the micro mirrors can independently rotate and reflect the incident light rays at a specific angle to form image light.

The lens 30 of the present invention includes a plurality of lenses. In the present embodiment, the lens in the lens 30 is composed of ten lenses, that is, the total number of lenses is less than or equal to 10. In another example, the lens in the lens 30 in this embodiment is composed of 20 lenses, that is, the number of lenses may be less than or equal to 20.

The relative relationship of the aforementioned elements will be described below. In this embodiment, the blue laser beam emitted by the light source 110 is first collimated through the lens group 120 and reaches the beam splitting element 130. The optical axes of the beam splitting element 130 and the lens group 120 are at an angle of about 45 degrees, that is, Its entrance angle is about 45 degrees. The spectroscopic element 130 reflects blue light and focuses the blue light on the surface of the fluorescent wheel 150 via the lens group 140.

During this period, the fluorescent wheel 150 continues to rotate, and the blue light sequentially illuminates different areas on the fluorescent wheel 150. In this embodiment, the phosphor wheel includes a phosphor layer region 150A and an optically active region 150B. When blue light is incident on the phosphor layer region 150A on the phosphor wheel 150, the phosphor powder in the phosphor layer region 150A can receive the blue beam and generate and output a yellow beam. A part of the yellow light beam will illuminate the light splitting element 130, and another part will illuminate the reflective layer of the fluorescent wheel 150, but the reflective layer will reflect the part of the light to the light splitting element 130. When the blue light is incident on the optically active region 150B on the fluorescent wheel 150, since the optically active region is substantially transparent, the blue light will penetrate the color wheel 150, and the first reflecting mirror 171 of the mirror group 170 behind it and After the second mirror 172 is sequentially reflected, it is collimated by the lens 174, and then reflected by the third mirror 173 to reach the other surface of the spectroscopic element 130 opposite to the fluorescent wheel 150 and the light source 110.

The beam splitting element 130 reflects the blue light and enters the fly-eye lens 180. On the other hand, the excited yellow light beam is reflected toward the light splitting element 130 and penetrates into the fly-eye lens 180. After the blue light and the yellow light output the fly-eye lens 180, the blue light and the yellow light are collected by the lens group 190 and are straight. Then, the blue and yellow beams pass through a total reflection 稜鏡210, respectively, and are reflected by the total optical reflection of the total optical interface of the total reflection 稜鏡210.

Then, the blue and yellow beams leave the total reflection 稜鏡210 and enter the beam splitting element 220. The wavelength splitting element 220 has a wavelength selective interface 221 therein. The wavelength selection interface 221 allows the blue light to pass through and the red portion of the yellow light to be reflected to form a red and blue light beam. In the present embodiment, the aforementioned red light is the third color light beam. At the same time, the wavelength selection interface 221 will penetrate the green light in the yellow light. Part to form a green light beam. In the present embodiment, the aforementioned green light is a fourth color light beam. The red and blue beams that penetrate the wavelength selective interface 221 enter the spatial light modulator 240 at different timings, and the spatial light modulator 240 also reflects and converts the blue and red light beams into a blue color, respectively. Red image beam. Subsequently, the blue and red image beams will penetrate the wavelength selective interface 221 of the beam splitting element 220 and enter and penetrate the total reflection 稜鏡210. Similarly, when the green light beam passes through the wavelength selection interface 221 of the beam splitting component 220, the spatial light modulator 230 is entered. The spatial light modulator 230 also converts the green light beam into a green image beam and reflects the green image beam. The wavelength selective interface 221 is penetrated through the beam splitting element 220 and enters and penetrates the total reflection 稜鏡210. After the image light of the three colors of blue, red and green passes through the total reflection 稜鏡210, the three-color image light enters the projection lens 30 and is projected as an image. It should be noted that the dual spatial light modulators 230, 240 of the present architecture are designed such that the dual spatial light modulators 230, 240 simultaneously and continuously output red and green light. In this way, it is not necessary to waste light of a specific wavelength, so that the overall light efficiency of the system can be greatly improved.

The design of another embodiment of the present creation will be described below. In the following examples, only differences from the first embodiment will be described. In the present embodiment, the light output lens group 190 is the same as the previous example. The differences are as follows.

In this embodiment, the projector is provided with a beam splitting element 410, a lens group 470, a lens group 480, a crucible 420, a light valve 430, a crucible 440, a light valve 450, and a light combining optical element 460 behind the optical path of the lens group 190. .

The so-called splitting element 410 of the present invention refers to a bandpass filter, a bandstop filter, a Dichroic filter, a dichroic mirror, and a color separation. (Dichroic prism), X-type X-ray filter (X Plate), X-type X-ray (X Prism), etc., optical elements that can penetrate or reflect light of a specific optical characteristic, or include the foregoing At least one and a combination thereof. In this embodiment, the light splitting element 410 is a Dichroic filter. In this embodiment, the beam splitting element 410 allows blue and red light waves. Pass through and let the green wavelength be reflected. In another embodiment, the filter can also pass the wavelength corresponding to the red light and reflect the light of the blue and green wavelengths. In another example, the penetration characteristics of the beam splitting element to red light and green light may be opposite to the previous example, and the creation does not impose any limitation.

The so-called lens groups 470, 480 of the present invention include one or more lenses. In addition to the lens, other non-lens elements are also included in the lens groups 470, 480. In the present embodiment, the lens groups 470, 480 include a lens having a positive diopter for collimation. In another example, the lens groups 470, 480 are respectively composed of two lenses that are inclined to each other and have a positive diopter; and at least one of the two may be an aspherical lens.

The so-called 稜鏡420 and 稜鏡440 refer to a group including a TIR PRISM group or an RTIR PRISM group or a combination and a modification of the above two elements. In the present embodiment, the crucibles 420, 440 are a total reflection group, that is, they are one type of total reflection optical elements. It should be noted that a single set of turns may be composed of a plurality of independently arranged and unconnected turns. In the embodiment, in order to create a total reflection surface, an air may be selectively disposed between the turns. Void.

The light valves 430 and 450 are referred to as optical elements that convert illumination light into image light, that is, any of elements such as a digital micro-reflection wafer, a liquid crystal panel, and a germanium-based liquid crystal panel. The light valves 430, 450 are in this embodiment a digital micro-reflective wafer (DMD).

The so-called light combining optical element 460 of the present invention refers to a lens, a mirror, a bandpass filter, a bandstop filter, a Dichroic filter, and a dichroic (dichroic). Mirror), Dichroic prism, X Plate, X Prism, etc. Optics that allow light of specific optical properties to penetrate or reflect An element, or at least one of the foregoing, and combinations thereof. In the present embodiment, the light combining optical element 460 is a dichroic prism. In the present embodiment, the light combining optical element 460 can reflect the wavelengths of the blue light and the red light, and allow the green light wavelength to penetrate. In another embodiment In the light valve position and the color of the incoming light beam, the wavelength corresponding to the red light can be passed and the light of the blue and green wavelengths can be reflected. In another example, the wear characteristics of the combined optical element 460 for red and green light may be opposite to the previous example, and the present invention does not impose any limitation.

What is different from the previous example is that after passing through the lens group 190, the light passes through a beam splitting element 410. In the present embodiment, the beam splitting element 410 penetrates the blue light beam and the red light beam and reflects the green light beam. After being reflected, the green light beam is collimated through lens group 480 and enters 稜鏡420, and is reflected to the surface of light valve 430 via the total reflection interface of 稜鏡420. The light valve 430 converts the green light beam into a green image light beam, and then outputs it to the projection lens 30 via the through-lighting optical element 460 for projection. On the other hand, the blue light beam and the red light beam penetrating the beam splitting element 410 are respectively collimated by the lens group 470 at different times, and then reflected to the surface of the light valve 450 via the total reflection interface of the crucible 440, and the light valve 450 The blue and red beams are converted into a blue and red image beam. The blue and red image beams are reflected by the combining optics 460 to the projection lens 30 for projection.

The design of the third embodiment of the present creation will be described below. In the following examples, only differences from the second embodiment will be described. In the embodiment, the light splitting element 410 is a color separation. When the dichroic mirror is used for splitting in the second embodiment, the greater the angle of incident light entering the dichroic mirror, the greater the color shift (Color Shift), resulting in color control of the entire screen. It is also difficult. In the present embodiment, when the color separation is used, when the light hits the entrance surface of the crucible, the angle of the light incident on the central coating layer can be reduced because of the influence of Snell's Law. . In addition, in this embodiment, each of the light-emitting interfaces of the color separation pupil is respectively provided with a filter coating corresponding to the color of the light beam, so that the color of the light beam is further purified.

The design of the fourth embodiment of the present creation will be described below. In the following examples, only differences from the third embodiment will be described. A single fly-eye lens 180 is placed compared to the third embodiment In the present embodiment, the fly-eye lens 180 is removed and disposed between the optical paths of the beam splitting element 410, the lens group 480, and the 稜鏡420. There is a fly-eye lens 491; and another fly-eye lens 492 is disposed between the optical paths of the beam splitting element 410, the lens group 470, and the crucible 440 to further improve the uniformity of the light beam.

Compared with the single light valve structure, the creation of the dual light valve design can effectively improve the overall brightness. With the use of fly-eye lenses, the overall space requirements of the system can be reduced and the number of lenses required can be reduced, making the system smaller. Compared with the three-light valve architecture, the design is difficult to design and produce, and the brightness can be close to the three-light valve architecture. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. For example, a lens or other optical element for adjusting the light type is disposed between the optical elements, or, for example, in the first embodiment, the fluorescent wheel used can reflect blue light and yellow light according to different timings, and the subsequent reflection is omitted. Mirror sets and so on. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application attached.

10‧‧‧Lighting device

110‧‧‧Light source

111‧‧‧Laser Diode Package

111A‧‧‧microlens

120‧‧‧ lens group

121‧‧‧ lens

122‧‧‧ lens

130‧‧‧Spectral components

140‧‧‧ lens group

150‧‧‧ fluorescent wheel

150A‧‧‧Flame powder zone

150B‧‧‧Optical area

160‧‧‧ lens group

170‧‧‧Mirror group

171‧‧‧Mirror

172‧‧‧Mirror

173‧‧‧Mirror

174‧‧‧ lens group

180‧‧‧Future eye lens

190‧‧‧ lens group

20‧‧‧ imaging device

210‧‧‧ Total internal reflection components

220‧‧‧Spectral components

221‧‧‧wavelength selection interface

230‧‧‧Space light modulator

240‧‧‧Space light modulator

30‧‧‧Projection lens

Claims (10)

A projector comprising: a light source for outputting a first color beam; a fluorescent wheel having a first region and a second region, the first region receiving the first color beam and exciting outputting a second color a light beam, the first color light beam may continue the optical path through the second region; a fly-eye lens disposed on the traveling path of the first color light beam and the second color light beam; a first light splitting element disposed at the light beam The first color splitting component converts and outputs the second color light beam into a third color light beam and a fourth color light beam different in optical path; a first light valve The first color beam and the third color beam are converted into a first image beam, and the second light valve is disposed on the first color beam and the third color beam. The fourth color beam can be converted into a second image beam in a traveling path of the four-color beam; and a light combining optical element can be coupled to the first image beam and the second image beam; wherein the first color beam Color, the color of the second color beam, the Three color shade of color and the fourth color light beams, a different system. The projector of claim 1, further comprising: a first lens group having a positive refractive power disposed on a path of travel of the first color light beam between the fluorescent wheel and the light source; a second lens group having a positive refracting power disposed on a traveling path of the first color light beam, the second lens group being disposed at the other end of the optical path of the fluorescent wheel relative to the first lens group; a mirror The set is disposed on the travel path of the first color light beam, the mirror is disposed at the other end of the optical path of the second lens group relative to the fluorescent wheel; a dichroic mirror is disposed on the first color light beam And the path of the second color light beam, the dichroic mirror can reflect any one of the first color light beam and the second color light beam, and can pass the other, the dichroic mirror is disposed on the firefly a light path of the light wheel and the fly-eye lens; a third lens group having a positive diopter, disposed on an optical path between the fly-eye lens and the first beam splitter; and a fourth lens group having a positive diopter set at An optical path between the first light valve, the first light splitting element and the light combining optical element; a first turn is disposed on an optical path between the fourth lens group and the first light valve; a fifth lens group, the diopter is positive, and is disposed in the second light valve, the first And an optical path between the second Prism, disposed in the fifth lens group and said second light valve; spectral element and bonded on an optical path between the optical element. A projector comprising: a light source for outputting a first color beam; a fluorescent wheel having a first region and a second region, the first region receiving the first color beam and exciting outputting a second color a light beam, wherein the first color light beam can continue the optical path through the second region; a first beam splitting element is disposed on the travel path of the first color light beam and the second color light beam, and the first light splitting component can convert and output the second color light beam into a third color light beam and a first light path a four-color beam; a first fly-eye lens disposed on the progressive path of the first color beam and the third color beam; a second fly-eye lens disposed on the traveling path of the fourth beam; a first light valve The first color beam and the third color beam are converted into a first image beam, and the second light valve is disposed on the first color beam and the third color beam. The fourth color beam can be converted into a second image beam in a traveling path of the four-color beam; and a light combining optical element can be coupled to the first image beam and the second image beam; wherein the first color beam The color, the color of the second color beam, the color of the third color light, and the color of the fourth color beam are different. The projector according to claim 3, wherein a lens having a positive diopter is not included between the first fly-eye lens and the second compound eye and the optical path of the first beam splitter. A projector according to any one of claims 1 to 2, wherein the light combining optical element is a color separation or a dichroic mirror. The projector of any of claim 1 or claim 2, wherein the first beam splitting element is a color separation unit. The projector of claim 1 or claim 3, wherein the first light valve and the second light valve are each a digital microlens array wafer. The projector of claim 1 or claim 3, further comprising a second beam splitting element disposed on a path of travel of the first color light beam and the second color light beam, The second beam splitting element can reflect either of the first color beam and the second color beam and can pass the other. A projector comprising: a light source for outputting a first color beam; a fluorescent wheel having a phosphor layer region and an optically active region, the phosphor layer region receiving the first color beam and outputting a beam a second color light beam, the optically active region may pass or reflect the first color light beam and leave the fluorescent wheel; a first light splitting element is disposed on the traveling path of the first color light beam and the second color light beam, The first beam splitting element can reflect a portion of the second color beam to form a third beam, and allow another portion of the second color beam to penetrate to form a fourth beam; a second beam splitting element is disposed on In the traveling path of the first color light beam and the second color light beam, the second light splitting element can reflect any one of the first color light beam and the second color light beam, and can allow the other to penetrate; a lens disposed on the path of the first color beam and the second color beam and disposed between the optical paths of the first beam splitting element and the second beam splitting element; a first spatial light modulator Receiving the first beam and the third beam and converting into the first image beam; a second spatial light modulator, configured to receive the fourth light beam and convert the second light beam into a second image beam; and a third beam splitting element disposed on the optical path of the first image beam and the second image beam Reflecting either of the first image beam and the second image beam and allowing the other to penetrate. The projector of claim 9, wherein the first spatial light modulator and the second spatial light modulator are respectively a digital microlens array wafer.