TWI720144B - Light source apparatus - Google Patents

Abstract

A light source apparatus including a first light source, a second light source, a reflective mirror and a filter film is provided. The first light source is configured to output a first light including a first color, and the second light source is configured to output a second light including a second color. The reflective mirror is disposed on a transmission path of the second light, and the reflective mirror has a reflective layer and a wavelength conversion material layer disposed on the reflective layer. The reflective mirror receives the second light and output a third light, and the third light includes a third color. The filter film is disposed on a transmission path of the first light and the third light.

Description

Light source device

The present invention relates to a light source device, especially a light source device with a novel light combining structure.

With the development of solid-state light sources and projection technology in recent years, projection devices based on solid-state light sources such as light-emitting diodes (LEDs) and laser diodes have gradually gained popularity in the market.

Among the known projector architectures, there is a light-combining architecture that uses a phosphor wheel with both penetration and reflection. Some areas of the phosphor wheel are covered with phosphor, and some areas are transparent. When the phosphor wheel rotates, short-wavelength light (such as blue light) from the outside will excite the phosphor on the phosphor wheel to produce a specific color light, and part of the blue light can penetrate the phosphor wheel The transparent area through the appropriate light path structure is combined with the specific color light generated by the phosphor and the color light provided by the light source with other colors to form the illuminating beam of the projector structure. However, in the above-mentioned projector architecture, it is necessary to set up an appropriate optical path architecture to guide the blue light penetrating the phosphor wheel to combine with other colors, making the overall projector architecture more complex, requiring more optical components, and The assembly time is also longer.

The present invention provides a light source device with a simplified light path structure, and a projection device using the light source device has better color performance and better cost-effectiveness.

In an embodiment of the present invention, the light source device includes at least two light sources, a reflector and a filter film. The aforementioned two light sources are respectively used to output a first light and a second light including a first color and a second color. The reflecting mirror may be a color wheel, which is arranged on the transmission path of the second light, and the reflecting mirror has a reflecting layer and a wavelength conversion material layer arranged on the reflecting layer. The wavelength conversion material layer of the reflector converts the second light into a third light including a third color and outputs the third light. The filter film is arranged on the transmission path of the first light and the third light.

Based on the above, in related embodiments of the present invention, since the reflector of the light source device receives the second light and outputs the third light, the light source device may not use the light combining structure of the phosphor wheel that has both penetration and reflection. It has a simplified optical path structure. The light source device has fewer optical elements, so that the assembly man-hours of the light source device can be effectively reduced. In addition, the filter film of the light source device is arranged on the transmission path of the first light and the third light, so the third light passing through the filter film can have a relatively pure color, so that the projection device using the light source device has a wider color. area. In addition, based on the light path structure of the light source device, the beam splitter can be designed to pass the light waveband corresponding to the third color, as opposed to allowing the light waveband of a single color to pass through, as opposed to allowing multiple light wavebands with discontinuous and different colors to pass. The coating design of the mirror is relatively simple and easy to manufacture, so that the light source device has better cost-effectiveness.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram showing the structure of a light source device and a projection device using the light source device according to an embodiment of the present invention. Please refer to FIG. 1. In this embodiment, the projection device 200 includes a light source device 100, a light valve 210, and a projection lens 220, and the light source device 100 includes a first light source 110, a second light source 120, a mirror 130, a first beam splitter 140, and a filter film. 150, a third light source 160, a second beam splitter 170, a light uniforming element 180, and a diffusion sheet 190.

The design of each component will be described below. The first light source 110, the second light source, and the third light source 160 are used to output the first light L1, the second light L2, and the fourth light L4, respectively. The first light source 110, the second light 120, and the third light 160 may respectively include, for example, a laser diode (LD) chip and a light-emitting diode (LED) chip that can emit various visible lights. Any one of its package body. In this example, the first light source 110 includes a red light emitting diode chip, and the first color is substantially red. More specifically, the first light L1 has a corresponding spectral energy distribution curve in a spectral energy distribution map, and the peak of the distribution curve falls in red (for example, 620 nm to 750nm) in the wavelength range. In addition to the light-emitting chip itself, the first light source 110 must also be provided with a lens (not shown) with diopter to converge the divergence direction of the light.

In this example, the second light source 120 includes a blue laser diode bank that can emit a second light, and the color of the light emitted by the second light is the second color, which is essentially blue . Similarly, the peak of the distribution curve of the second light L2 falls in the blue wavelength range (for example, 440 nm to 460 nm). In addition to the light-emitting chip itself, a microlens matrix with a layout corresponding to the above-mentioned laser diode chips must also be provided above the second light source 120 to adjust its light type.

In this example, the third light source 160 includes a light emitting diode chip that can emit a fourth light, and the color of the light emitted by the fourth light is the second color, which is substantially blue. For example, the peak of the distribution curve of the fourth light L4 falls in the blue wavelength range (for example, 440 nm to 460 nm). It should be noted that the wavelength of the light emitted by the third light source 160 is similar to the wavelength of the second light source 120, but does not need to be exactly the same. For example, the corresponding wavelength value of the wave crest of the second light L2 may be slightly smaller than the corresponding wavelength value of the wave crest of the fourth light L4.

On the other hand, in this example, the system includes a mirror 130. The reflector 130 generally refers to an optical element that changes the direction of light travel. In this example, the reflector refers to a fluorescent wheel. More specifically, the reflector 130 includes a substrate 132, a reflective layer 134, a wavelength conversion material layer 136, and a motor 138. The substrate 132 is, for example, an annular sheet, and the intermediate ring of the annular sheet is embedded on the rotating shaft of the motor 138 so that the base 132 is suitable for being driven by the motor 138 to rotate. In addition, the light reflecting layer 134 is disposed on the substrate 132, and the wavelength conversion material layer 136 is disposed on the light reflecting layer 134. The wavelength conversion material layer 136 includes phosphor. The fluorescent powder can be a fluorescent powder that can emit light of green, yellow or other colors, and the present invention is not limited to this. In this embodiment, the wavelength conversion material layer 136 can receive the blue light of the second light L2, and by exciting the photoluminescence phenomenon of the phosphor in the wavelength conversion material layer 136, the converted light CL is generated. The converted light CL includes a third color, for example, and the peak of the converted light CL falls within a range of 495 nm to 570 nm, for example, the wavelength of the converted light CL may be 540 nm. At the same time, in some related embodiments, a part of the second light L2 is not absorbed by the phosphor and will be reflected together with the converted light CL, that is, the third light includes the converted light CL and Part of the unabsorbed blue light from the second light L2'.

Furthermore, in this embodiment, the system is provided with a first beam splitter 140. Generally speaking, the first beam splitter 140 generally refers to an optical element with a light splitting function, such as a half mirror, a polarizer that uses P and S polarities to split light, various wave plates, various prisms that use light incident angles, and wavelengths. Spectroscopic splitter and so on. In this example, the first beam splitter 140 is a beam splitter that uses wavelength splitting, that is, a dichroic mirror (DM). The first beam splitter 140 has a first surface S1 and a second surface S2, and the first surface S1 and the second surface S2 are, for example, disposed opposite to each other. In this embodiment, the first surface S1 is wavelength selective. FIG. 2 is a simplified drawing of the light transmittance of the first surface S1 of the first beam splitter 140 in the embodiment of FIG. 1 versus the light wavelength. The “wavelength” on the horizontal axis of FIG. 2 represents the wavelength of light, and the “transmittance” on the vertical axis represents the light transmittance of the first surface S1. In FIG. 2, area I represents the transmittance of blue light with a shorter wavelength, area II represents the transmittance of green light, and area III represents the transmittance of red light with a longer wavelength. Specifically, in this embodiment, the first surface S1 has a coating film, and for example, the third light L3 that appears green is a band pass. Therefore, the first surface S1 may, for example, pass green light and reflect red and blue light. It should be noted that FIG. 2 only exemplarily shows that the first surface S1 exhibits a band pass for green light. Practically speaking, the light transmittance of the first surface S1 may have other distributions within a wavelength range according to process conditions such as coating, and the present invention is not limited to this. Practically speaking, since the coating technology is not easy to form a perfect band pass for green light as shown in FIG. 2, in some embodiments, some of the blue light can still pass through the first beam splitter 140.

Please continue to refer to FIG. 1, in this embodiment, a filter film 150 is provided. Generally speaking, the filter film 150 generally refers to a structure that filters out a specific wavelength of light in the form of reflection or absorption, so as to remove a specific wavelength or color in a light. Generally speaking, the filter film 150 can be selectively formed on a specific optical surface by coating, bonding, or the like, or can be provided as an independent element. In this embodiment, the filter film 150 is formed on the surface of the specific optical element, and the filter film 150 can prevent most of the blue light from penetrating.

In this embodiment, the system further includes a second beam splitter 170. The properties of the second beam splitter 170 are similar to those of the first beam splitter 140. In this example, the second beam splitter is a dichroic member and has wavelength selectivity. More specifically, in this example, the second beam splitter 170 reflects blue light but allows red and green light to pass through.

In this embodiment, the system further includes a light homogenizing element 180 for uniformizing the intensity distribution of the illuminating light L5. Generally speaking, the light uniforming element 180 may be an optical element such as a fly-eye lens or a light integration rod, and the present invention is not limited thereto. In this example, the light homogenizing element 180 is a fly-eye lens.

In this embodiment, the system further includes a diffuser 190. The diffusion sheet 190 includes, for example, a film layer impregnated with diffusion particles, a micro-nano structure with an increased diffusion effect, or an optical element with a light diffusion effect such as a lens. For example, it includes a plurality of light diffusion microstructures, and can pass through The power of the light of the diffuser 190 is adjusted.

In this embodiment, the system further includes a light valve adapted to convert the illumination light L5 into the projection light L6. In detail, the light valve 210 is, for example, a digital micro-mirror device (DMD) or a liquid-crystal-on-silicon panel (LCOS panel). However, in other embodiments, the light valve 210 may also be a transmissive liquid crystal panel or other spatial light modulator, and the invention is not limited thereto. In this example, the light valve 210 is a digital micro-mirror element.

In this embodiment, the system further includes a projection lens 220 composed of at least one lens. Generally, an aperture diaphragm may be provided inside the projection lens 220, and a plurality of lenses are provided at the front and rear of the aperture diaphragm to adjust the shape and aberration of the image light.

The arrangement of the components of the projection device 200 and the transmission process of light are exemplarily described below. In this embodiment, the first beam splitter 140 is disposed on the transmission path of the first light L1, the second light L2, and the third light L3. Specifically, the first beam splitter 140 is inclined with respect to the first light source system. More specifically, the incident angle of the first light ray L1 to the first beam splitter 140 is an angle of 45 degrees. The first surface S1 faces the reflecting mirror 130 and the second light source 120, and the second surface S2 faces the first light source 110 and the optical lens 101.

After the second light source 120 outputs the blue second light L2, the second light L2 is guided by the light path and passes through the diffuser 190. That is, the diffuser 190 is disposed on the transmission path of the second light L2, and the diffuser 190 is disposed between the second light source 120 and the reflector 130. Specifically, the diffusion sheet 190 is disposed between the first light source 110 and the reflector 130 along the transmission path of the second light L2. After passing through the diffusion sheet 190, the second light L2 is transmitted to the first surface S1 of the first beam splitter 140. Then, the second light L2 is reflected on the first surface S1 and transmitted to the wavelength conversion material layer 136 of the reflector 130. After the second light L2 enters the wavelength conversion material layer 136, at least a part of the second light L2 is converted by the wavelength conversion material layer 136 into converted light CL of a third color (for example, green). The converted light CL, for example, leaves directly toward the direction leaving the reflector 130 or exits toward the direction leaving the reflector 130 after being reflected on the reflective layer 134. In addition, the blue second light L2 that has not been converted by the wavelength conversion material layer 136 (fluorescent powder), for example, is reflected on the reflective layer 134 and then exits in a direction away from the reflector 130. In this embodiment, since the third light L3 includes the converted light CL and the unconverted second light L2, the third light L3 includes a third color (for example, green) and a second color (for example, blue). The reflecting mirror 130 is arranged on the transmission path of the second light L2. It should be noted that in other embodiments, the above-mentioned first color, second color, and third color can be designed as other colors according to actual light-emitting requirements or projection-related requirements, and the present invention is not based on this. Is limited.

3 is a graph of the normalized light intensity of the third light leaving the mirror in the embodiment of FIG. 1 versus wavelength. Please refer to FIGS. 1 and 3 at the same time. 3 shows the light intensity of the third light L3 at different wavelengths when it just leaves the mirror 130, and at this time, the third light L3 includes the converted light CL and the second light L2 that has not been converted by the wavelength conversion material layer 136. The "wavelength" marked on the horizontal axis of FIG. 3 represents the wavelength of the third light L3, and its unit is nanometer (nm), and the "normalized light intensity" marked on the vertical axis represents the third light L3 corresponding to the The result of normalization of the measured light intensity at the wavelength. Specifically, since the third light L3 includes the second light L2 that has not been converted by the wavelength conversion material layer 136, the third light L3 exhibits a small peak in the blue wavelength band (for example, near 450 nm). In detail, since the light intensity of the green converted light CL in the third light L3 is significantly greater than that of the blue second light L2, the third light L3 still appears green.

Please continue to refer to FIG. 1. In this embodiment, the third light L3 leaving the reflector 130 is transmitted to the first surface S1 of the first beam splitter 140. Since the first surface S1 can pass green light, for example, at least a part of the third light L3 passes through the first surface S1 and the second surface S2 in order to leave the first beam splitter 140. In practice, however, since the coating technology is not easy to form a perfect band pass for green light as shown in FIG. 2, a part of the blue part of the third light L3 still passes through the first beam splitter 140.

In addition, in this embodiment, after the first light source 110 outputs the red first light L1, the first light L1 is reflected on the second surface S2 of the first beam splitter 140 and leaves the first beam splitter 140. In this embodiment, at least a part of the third light L3 leaving the first beam splitter 140 and the first light L1 leaving the first beam splitter 140 pass through the filter film 150. Specifically, the filter film 150 is used to remove the second color (for example, blue) of the third light L3. For example, the filter film 150 may be used to filter the blue second light L2 contained in the third light L3 that has not been converted by the wavelength conversion material layer 136, or the filter film 150 may also be used to filter out factors The blue light mixed in the third light L3 due to other factors. Specifically, the filter film 150 may, for example, prevent the blue light mixed in the third light L3 from passing through the filter film 150. Therefore, the third light L3 passing through the filter film 150 has a relatively pure green light.

In this example, the filter film 150 may be disposed on the surface S3, the surface S4 of the optical lens 101 shown in FIG. 1 or the surface S5 of the second beam splitter 170, for example. Alternatively, the light source device 100 may be provided with other optical elements on the transmission paths of the first light L1 and the third light L3, and the optical element is provided with a filter film 150. Or, in another example, the filter film 150 may be an independent element disposed on the transmission path of the first light L1 and the third light L3, and the present invention is not limited thereto.

In this embodiment, the third light L3 passing through the filter film 150 and the first light L1 passing through the filter film 150 are transmitted to the second beam splitter 170, and the blue light of the fourth light L4 is also emitted from the third light source 160. Transmitted to the second beam splitter 170. In this embodiment, the second beam splitter 170 allows the first light L1 and the third light L3 to pass through, and reflects the fourth light L4. That is, the second beam splitter 170 is disposed on the transmission path of the fourth light L4, the third light L3, and the first light L1. Thereby, the first light L1, the third light L3, and the fourth light L4 are combined to form the illumination light L5. The illumination light L5 passes through the light homogenizing element 180 located on the transmission path of the illumination light L5 to make its intensity distribution uniform, and then is transmitted to the light valve 210. In detail, in this embodiment, the third light L3 leaving the first beam splitter 140 does not undergo reflection before traveling to the light valve 210. In addition, the light valve 210 converts the illuminating light L5 into a projection light L6, and the projection lens 220 is used to project the projection light L6 onto an imaging plane or a screen (not shown) to form an image frame.

In detail, the diffuser 190 can adjust the power distribution of the second light L2 passing through the diffuser 190, and the power of the second light L2 can also be adjusted by driving the voltage or current of the second light source 120. FIG. 4 shows a plot of the conversion efficiency of the converted light versus the energy density of the second light at half-height with or without a diffuser in some embodiments of the present invention. Please refer to Figure 1 and Figure 4 at the same time. In Figure 4, the horizontal axis labeled "Energy Density at FWHM" represents the energy density at FWHM of the second light L2 emitted by the second light source 120, and its unit is watts per millimeter square (W /mm ² ). In addition, the “efficiency” on the vertical axis indicates the conversion efficiency of the second light L2 converted into the converted light CL by the wavelength conversion material layer 136, and the unit is lumens/watt (lm/W). In FIG. 4, the square data points are data points where the light source device 100 is not provided with a diffusion sheet 190, and the diamond data points are data points where the light source device 100 is provided with a diffusion sheet 190. Specifically, when the energy density of the FWHM of the second light L2 is too small, the phosphor of the wavelength conversion material layer 136 will absorb the second light L2, for example, and will not convert the corresponding converted light CL, causing the conversion Inefficient. In addition, when the energy density of the FWHM of the second light L2 is too large, the phosphor of the wavelength conversion material layer 136 may, for example, have a thermal quench effect, resulting in poor conversion efficiency. In this embodiment, if a better conversion efficiency is to be achieved, the basic effect can be achieved if the energy density of the half-height width of the second light L2 falls within the range of 5 to 60 watts/mm square. Preferably, the energy density of the half-maximum width of the second light L2 falls within the range of, for example, 5 to 30 watts/mm square. In addition, when the energy density of the FWHM of the second light L2 falls between 5 to 21 watts/mm square, the conversion efficiency of the phosphor into the converted light CL can be optimal. For example, in this embodiment, the energy density of the FWHM of the second light L2 is 20.8 watts/mm square. In addition, under the maximum operating condition, after the light source device 100 is provided with the diffusion sheet 190, the above-mentioned conversion efficiency may be increased by 9.5%, for example.

Please continue to refer to FIG. 1. In this embodiment, the light source device 100 further includes a plurality of optical lenses 101, 103, 105, 106, 107, 109 and a reflecting mirror 102, and these optical lenses 101, 103, 105, 106, 107 , 109 and the reflecting mirror 102 are used to guide the travel of the first light L1, the second light L2, the third light L3, and the fourth light L4 at least. In addition, the projection device 200 further includes a plurality of obliquely arranged optical lenses 201, 203 and a prism 202, and these optical lenses 201, 203 and the prism 202 are used at least to guide the progress of the illumination light L5 and the projection light L6. Specifically, the number and installation positions of the above-mentioned optical lenses 101, 103, 105, 106, 107, 109, 201, 203, mirror 102, prism 202, and other optical elements are for illustration only, and are not intended to limit the present invention. invention.

In this embodiment, since the reflector 130 is used to receive the second light L2 and output the third light L3, the light source device 100 may not adopt the light combining structure of the phosphor wheel that has both penetration and reflection. In addition, it is not necessary to provide an area through which blue light can penetrate on the reflector 130 as the fluorescent wheel, and the light source device 100 does not need to be provided with an optical path structure for guiding the blue light that penetrates the fluorescent wheel. In addition, the blue light in the illumination light L5 can be provided by the third light source 160. Therefore, the light source device 100 can have a simplified light path structure. The light source device 100 has fewer optical elements, so that the assembling man-hours of the light source device 100 can be effectively reduced. In addition, in the light source device 100 of the embodiment of the present invention, when the third light L3 passes through the filter film 150, the filter film 150 can filter out the light wavelength band corresponding to blue in the third light L3, and therefore passes through the filter film. The third light L3 of the film 150 has a relatively pure green color, which enables the projection device 200 using the light source device 100 to have a wider color gamut. In addition, based on the light path structure of the light source device 100, the first surface S1 of the first beam splitter 140 of the light source device 100 can be designed to pass the green third light L3 and reflect the red first light L1 and the blue light The second light L2, therefore, the first beam splitter 140 may be designed to pass through the light waveband corresponding to green. Compared with allowing the passage of multiple light wavebands with discontinuous and different colors, the coating design of a spectroscope that allows a single color light waveband to pass is relatively simple and easier to manufacture. Therefore, the manufacturing difficulty and cost of the first beam splitter 140 are relatively low, which makes the light source device 100 using the first beam splitter 140 more cost-effective.

FIG. 5 is a schematic diagram showing the structure of a light source device and a projection device adopting the light source device according to another embodiment of the present invention. Please refer to FIG. 5, the light source device 500 and the projection device 600 are similar to the light source device 100 and the projection device 200 of the embodiment in FIG. 1, and the differences are as follows. In this embodiment, the light source device 500 includes a reflective substrate 530, and the reflective substrate 530 has a phosphor layer 536. The phosphor layer 536 is, for example, laid on the surface of the reflective substrate 530, and the phosphor layer 536 is similar to the wavelength conversion material layer 136 of the embodiment in FIG. 1 for receiving the second light L2 from the second light source 120 and The output includes the third light L3 of the third color. Specifically, in this embodiment, the first surface S1 of the first beam splitter 140 is used to reflect the second light L2 to the reflective substrate 530. The second light L2 reflected by the first beam splitter 140 can enter the phosphor layer 536, and the second light L2 is converted into the third light L3 by the phosphor layer 536. The third light L3 includes converted light CL in the third color and unconverted light in the second color. In addition, the third light L3 is emitted toward a direction away from the reflective substrate 530 after being reflected on the reflective substrate 530, for example. In detail, the light source device 500 and the projection device 600 can at least achieve technical effects similar to the light source device 100 and the projection device 200 in the embodiment of FIG. 1. The light source device 500 has a simplified optical path structure, and the projection device 600 adopting the light source device 500 has a wider color gamut and better cost-effectiveness.

In summary, in the related embodiments of the present invention, since the reflector of the light source device receives the second light and outputs the third light, the light source device can have a simplified optical path structure. In addition, the filter film of the light source device is arranged on the transmission path of the first light and the third light, so the third light passing through the filter film can have a relatively pure color, so that the projection device using the light source device has a wider color. area. In addition, based on the light path structure of the light source device, the beam splitter of the light source device can be designed to pass the light waveband corresponding to the third color, so that the light source device has better cost-effectiveness.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

100,500‧‧‧Light source device 101,103,105,106,107,109,201,203‧‧‧Optical lens 102,130‧‧‧Reflector 110‧‧‧First light source 120‧‧‧Second light source 132‧‧‧Substrate 134‧‧‧Reflective layer 136‧‧‧Wavelength conversion material layer 138‧‧‧Motor 140‧‧‧First beam splitter 150‧‧‧Filter film 160‧‧‧Third light source 170‧‧‧ Second beam splitter 180‧‧‧Light uniform element 190‧‧‧Diffuser 200,600‧‧‧Projection device 202‧‧‧Prism 210‧‧‧Light valve 220‧‧‧Projection lens 530‧‧‧Reflective substrate 536 ‧‧‧Fluorescent powder layer CL‧‧‧Converted light I, II, III‧‧‧Area L1‧‧‧First light L2‧‧‧Second light L3‧‧‧Third light L4‧‧‧Fourth light L5‧‧‧Illumination light L6‧‧‧Projection light S1‧‧‧First surface S2‧‧‧Second surface S3, S4, S5‧‧‧Surface

FIG. 1 is a schematic diagram showing the structure of a light source device and a projection device using the light source device according to an embodiment of the present invention. FIG. 2 is a simplified drawing of the light transmittance of the first surface of the first beam splitter in the embodiment of FIG. 1 versus the light wavelength. 3 is a graph of the normalized light intensity of the third light leaving the mirror in the embodiment of FIG. 1 versus wavelength. FIG. 4 shows a plot of the conversion efficiency of the converted light versus the energy density of the second light at half-height with or without a diffuser in some embodiments of the present invention. FIG. 5 is a schematic diagram showing the structure of a light source device and a projection device adopting the light source device according to another embodiment of the present invention.

100‧‧‧Light source device

101, 103, 105, 106, 107, 109, 201, 203‧‧‧Optical lens

102、130‧‧‧Reflecting mirror

110‧‧‧First light source

120‧‧‧Second light source

132‧‧‧Substrate

134‧‧‧Reflective layer

136‧‧‧Wavelength conversion material layer

138‧‧‧Motor

140‧‧‧First beam splitter

150‧‧‧Filter film

160‧‧‧Third light source

170‧‧‧Second beam splitter

180‧‧‧Light uniform element

190‧‧‧Diffuser

200‧‧‧Projection device

202‧‧‧Prism

210‧‧‧Light valve

220‧‧‧Projection lens

CL‧‧‧Converting light

L1‧‧‧First light

L2‧‧‧Second light

L3‧‧‧Third Ray

L4‧‧‧Fourth ray

L5‧‧‧Lighting light

L6‧‧‧Projection light

S1‧‧‧First surface

S2‧‧‧Second surface

S3, S4, S5‧‧‧surface

Claims (9)

A light source device includes: a first light source for outputting a first light including a first color; a second light source for outputting a second light including a second color; and a reflector arranged at On the transmission path of the second light, the reflecting mirror has a reflecting layer and a wavelength conversion material layer disposed on the reflecting layer, the reflecting mirror receives the second light and outputs a third light, and the third light Comprising a third color; a first beam splitter arranged on the transmission path of the first light and the second light, wherein the first beam splitter guides the first light and the third light to the same direction; a The filter film is arranged on the transmission path of the first light, the second light and the third light, wherein the filter film is used to remove the second color; a third light source is used to output the first light, the second light, and the third light. A fourth light of two colors; and a second beam splitter arranged on the transmission path of the fourth light. The light source device according to claim 1, wherein the reflector is a fluorescent wheel, the second light is converted into the third light by the wavelength conversion material layer, and the third light includes the third color and The second color. According to the light source device described in claim 1, wherein the first beam splitter is further arranged on the transmission path of the third light, the first beam splitter has a first surface and a second surface, and the first beam splitter has a first surface and a second surface. The surface reflects the second light to the mirror and allows at least a part of the third light to pass through, and the second surface reflects the first Light, wherein at least a part of the third light leaving the first beam splitter and the first light leaving the first beam splitter pass through the filter film. According to the light source device described in item 3 of the scope of patent application, the second beam splitter is further arranged on the transmission path of the third light and the first light, and the second beam splitter is used to combine the first light, The third light and the fourth light. The light source device described in item 1 of the scope of patent application further includes a diffuser arranged on the transmission path of the second light, and the diffuser is arranged between the second light source and the reflector. The light source device according to the first item of the scope of patent application, wherein the first color, the second color, and the third color are respectively relative to the wavelength ranges of red, blue, and green. A light source device includes: a first light source for outputting a first light including a first color; a second light source for outputting a second light including a second color; a reflective substrate with A phosphor layer, and the phosphor layer is used to receive the second light and output a third light including a third color; a first beam splitter is arranged on the first light, the second light, and On the transmission path of the third light, the first beam splitter has a first surface and a second surface. The first surface reflects the second light to the reflective substrate and allows the third light to include the first surface. At least a part of the three colors passes through, and the second surface reflects the first light; a third light source is used to output a fourth light including the second color; A second beam splitter; and a filter film, wherein the first light, the second light and the third light are respectively a red light, a blue light and a green light, and the filter film is used to remove the blue light , And the filter film is arranged on the transmission path of the first light and the third light between the first beam splitter and the second beam splitter. The light source device according to claim 7, wherein at least a part of the third light leaving the first beam splitter and the first light leaving the first beam splitter pass through the filter film, and wherein leaving the beam splitter At least a part of the third light of the mirror includes the third color and the second color. The light source device according to item 8 of the scope of patent application, wherein the second beam splitter is arranged on the transmission path of the fourth light, the third light and the first light, and the second beam splitter is used to combine the The first light, the third light, and the fourth light.

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