TW201833655A - 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, and more particularly to a light source device having a novel light combining structure.

With the development of solid-state light sources and projection technologies in recent years, projection devices based on solid-state light sources such as light-emitting diodes (LEDs) and laser diodes have been increasingly favored by the market.

Among the known projector architectures, there is a light combining architecture that utilizes a phosphor powder wheel that combines penetration and reflection. Fluorescent powder is placed on some areas of the phosphor powder wheel, and some areas are transparent. When the phosphor powder wheel rotates, short-wavelength light from outside (such as blue light) will activate the phosphor powder on the phosphor powder wheel to produce a specific color light, and part of the blue light can penetrate the phosphor powder wheel. The transparent area is combined with the color light provided by the specific color light produced by the phosphor and the light source provided by the other color through an appropriate optical path structure to form an illumination beam of the projector architecture. However, in the above projector architecture, it is necessary to set an appropriate optical path architecture to guide the blue light penetrating the phosphor powder wheel to merge with other color lights, so that the overall projector architecture is complicated, and more optical components are required, and The assembly time is also longer.

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

In an embodiment of the invention, the light source device includes at least two light sources, a mirror, and a filter film. The two light sources are respectively configured to output the first light and the second light including the first color and the second color. The mirror is a color wheel disposed on the transmission path of the second light, and the mirror has a light reflecting layer and a wavelength conversion material layer disposed on the light reflecting layer. The wavelength converting material layer of the mirror converts the second light into a third light comprising the third color and outputs a third light. The filter film is disposed on the transmission path of the first light and the third light.

Based on the above, in the related embodiment of the present invention, since the mirror of the light source device receives the second light and outputs the third light, the light source device may not adopt the light combining structure of the fluorescent powder wheel that penetrates and reflects. It has a simplified optical path architecture. The light source device has fewer optical components, so that the assembly man-hour of the light source device can be effectively reduced. In addition, the filter film of the light source device is disposed on the transmission paths of the first light and the third light, so that 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 optical path architecture of the light source device, the beam splitter can be designed to pass the optical band corresponding to the third color, allowing the light of a single color to pass through the light band with respect to a plurality of optical bands that are allowed to be intermittent and have different colors. The coating coating design of the mirror is relatively simple and relatively easy to manufacture, making the light source device more cost effective.

The above described features and advantages of the invention will be apparent from the following description.

1 is a schematic structural view of a light source device and a projection device using the same according to an embodiment of the present invention. Please refer to FIG. 1 . In the 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 uniform 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 respectively configured to output the first light L1, the second light L2, and the fourth light L4. The first light source 110, the second light source 120, and the third light source 160 may respectively include, for example, a laser diode (LD) wafer capable of emitting various visible light, and a light-emitting diode (LED) wafer. Any of its packages. In this example, the first source 110 includes a red light emitting diode wafer and the first color is substantially red. More specifically, the first ray 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 750 nm) in the wavelength range. In addition to the light-emitting chip itself, the first light source 110 is also provided with a lens (not labeled) having a refracting power for converging the diverging direction of the light.

In this example, the second light source 120 includes a blue laser diode bank that emits a second light, and the light emitted by the second light has a second color, which is substantially blue. . Similarly, the peak of the distribution curve of the second light ray L2 falls within the wavelength range of blue (for example, 440 nm to 460 nm). In addition to the light-emitting chip itself, the second light source 120 is also provided with a microlens matrix corresponding to each of the foregoing laser diode wafers to adjust its light pattern.

In this example, the third light source 160 includes a light emitting diode chip that emits a fourth light, and the light emitted by the fourth light has a second color, which is substantially blue. For example, the peak of the distribution curve of the fourth light ray L4 falls within a wavelength range of blue (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 necessarily need to be identical. For example, the corresponding wavelength value of the peak of the second light L2 may be slightly smaller than the corresponding wavelength value of the peak of the fourth light L4.

On the other hand, in this example, the system includes a mirror 130. Mirror 130 generally refers to an optical element that has a direction of change in the direction of travel of the light. In this example, the mirror refers to a fluorescent wheel. More specifically, the mirror 130 includes a substrate 132, a light reflecting layer 134, a wavelength converting 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 such that the substrate 132 is adapted to be rotated by the motor 138. In addition, the reflective layer 134 is disposed on the substrate 132, and the wavelength conversion material layer 136 is disposed on the reflective layer 134. The wavelength converting material layer 136 includes phosphor powder. The phosphor powder may be a phosphor powder that can emit green, yellow or other color light, and the invention is not limited thereto. In the present embodiment, the wavelength conversion material layer 136 can receive the blue light of the second light L2 by exciting the photoluminescence of the phosphor in the wavelength conversion material layer 136 and generating the converted light CL. The converted light CL includes, for example, a third color, and the peak of the converted light CL is, for example, falling 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 portion of the second light L2 is not absorbed by the fluorescent powder and is reflected together with the converted light CL, that is, the third light includes, besides converting the light CL, Part of the unabsorbed, blue light from the second light L2.

Furthermore, in the embodiment, the system is provided with a first beam splitter 140. In general, the first beam splitter 140 generally refers to an optical element having a splitting function, such as a half-reflex lens, a polarizing plate that uses P, S polarity splitting, various wave plates, various prisms that use light splitting, and wavelengths. Spectroscopic beamsplitters and the like. In this example, the first beam splitter 140 is a beam splitter, 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 disposed opposite to each other, for example. In this embodiment, the first surface S1 is wavelength selective. 2 is a simplified diagram of the light transmittance of the first surface S1 of the first beam splitter 140 in the embodiment of FIG. 1 versus the wavelength of the light. The horizontal axis of Fig. 2 indicates that "wavelength" indicates the wavelength of light, and the "transmission rate" indicated by the vertical axis indicates the transmittance of the first surface S1. In FIG. 2, the area I represents the transmittance of blue light having a shorter wavelength, the area II represents the transmittance of green light, and the area III represents the transmittance of red light having a longer wavelength. Specifically, in the present embodiment, the first surface S1 has, for example, a plating film, and for the green light, for example, the third light ray L3 is a band pass. Therefore, the first surface S1 can pass, for example, green light to reflect red light and blue light. It should be noted that FIG. 2 only exemplarily shows that the first surface S1 presents a band pass for green light. Actually, the light transmittance of the first surface S1 may have other distributions in a wavelength range according to process conditions such as coating, and the invention is not limited thereto. In practice, in view of the fact that the coating technique is not easily formed as shown in FIG. 2, which is perfectly bandpass for green light, in some embodiments, the blue light may still partially pass through the first beam splitter 140.

With continued reference to FIG. 1, in the present embodiment, a filter film 150 is provided. In general, the filter film 150 generally refers to filtering out a specific band of light in the form of reflection or absorption to remove a specific wavelength or color structure among a light. In general, the filter film 150 can be selectively formed on a specific optical surface by coating, bonding, or the like, or disposed as a separate component. In the present embodiment, the filter film 150 is formed on the surface of the specific optical element, and the filter film 150 prevents most of the blue light from penetrating.

In this embodiment, the system further includes a second beam splitter 170. The nature of the second beam splitter 170 is similar to that 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.

In this embodiment, the system further includes a light uniform element 180 for homogenizing the intensity distribution of the illumination light L5. In general, the light uniform element 180 may be an optical element such as a fly-eye lens or a light integration rod, and the invention is not limited thereto. In this example, the light uniform 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 having an effect of increasing diffusion, or an optical element having a light-diffusing effect such as a lens, which includes, for example, a plurality of light-diffusing microstructures, and can pass through The light of the diffusion sheet 190 is adjusted in power.

In this embodiment, the system further includes a light valve adapted to convert the illumination light L5 into the projected 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 can 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 micromirror element.

In this embodiment, the system further includes a projection lens 220 composed of at least one lens. Generally, an aperture diaphragm may be disposed inside the projection lens 220, and a plurality of lenses are disposed on 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 apparatus 200 and the transmission process of the light are exemplarily explained below. In the embodiment, the first beam splitter 140 is disposed on the transmission paths 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, and more specifically, the light incident angle of the first light beam L1 to the first beam splitter 140 is 45 degrees. The first surface S1 faces the 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 ray L2, the second light ray L2 passes through the diffusion sheet 190 via the guidance of the optical path. That is, a diffuser 190 is disposed on the transmission path of the second light ray L2, and the diffusion sheet 190 is disposed between the second light source 120 and the mirror 130. Specifically, the diffusion sheet 190 is disposed between the first light source 110 and the mirror 130 along the transmission path of the second light ray L2. After the second light ray L2 passes through the diffusion sheet 190, it is transmitted to the first surface S1 of the first beam splitter 140. Next, the second light ray L2 is reflected on the first surface S1 and transmitted to the wavelength conversion material layer 136 of the mirror 130. After the second ray L2 enters the wavelength converting material layer 136, at least a portion of the second ray L2 is converted by the wavelength converting material layer 136 into a converted ray CL including a third color (eg, green). The converted ray CL exits, for example, away from the direction away from the mirror 130 or after being reflected on the reflective layer 134, away from the mirror 130. Further, the second second light ray L2 which is not converted by the wavelength conversion material layer 136 (fluorescent powder) is, for example, reflected on the light reflecting layer 134 and is separated from the direction away from the mirror 130. In the present embodiment, since the third light ray L3 includes the converted ray CL and the unconverted second ray L2, the third ray L3 includes a third color (for example, green) and a second color (for example, blue). The mirror 130 is disposed on the transmission path of the second light ray L2. It should be noted that in other embodiments, the first color, the second color, and the third color may be designed as other colors according to related requirements of actual light output or related requirements of projection, and the present invention does not Limited.

FIG. 3 is a diagram showing the normalized light intensity versus wavelength of the third light leaving the mirror in the embodiment of FIG. 1. Please refer to FIG. 1 and FIG. 3 at the same time. 3 presents the light intensity at different wavelengths of the third ray L3 just after exiting the mirror 130, and at this time the third ray L3 includes the converted ray CL and the second ray L2 that is not converted by the wavelength converting material layer 136. The "wavelength" indicated by the horizontal axis of Fig. 3 indicates the wavelength of the third light ray L3, the unit of which is nanometer (nm), and the "normalized light intensity" indicated by the vertical axis indicates that the third ray L3 corresponds to The result after normalization of the measured light intensity at the wavelength. Specifically, since the third light ray L3 includes the second light ray L2 that is not converted by the wavelength conversion material layer 136, the third light ray L3 exhibits a small peak in the blue light band (for example, near 450 nm). In detail, since the light intensity of the green converted light CL is significantly larger than the blue second light L2 in the third light L3, the third light L3 appears to appear green.

With continued reference to FIG. 1 , in the present embodiment, the third light L3 exiting the mirror 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 portion of the third light ray L3 sequentially exits the first beam splitter 140 through the first surface S1 and the second surface S2. However, in practice, since the coating technique is not easily formed as shown in FIG. 2, which is perfectly banded for green light, a portion of the blue portion of the third light L3 passes through the first beam splitter 140.

In addition, in the present 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 away from the first beam splitter 140. In the present embodiment, at least a portion of the third light ray L3 leaving the first beam splitter 140 and the first light ray L1 exiting 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 can be used to filter out the second light L2 of the blue light that is not converted by the wavelength conversion material layer 136 included in the third light L3, or the filter film 150 can also be used to filter out the cause. The blue light mixed in the third light L3 by other factors. Specifically, the filter film 150 may be, for example, such that blue light mixed in the third light ray L3 cannot pass 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 can be disposed, for example, on the surface S3 of the optical lens 101, the surface S4, or the surface S5 of the second beam splitter 170 illustrated in FIG. Alternatively, the light source device 100 may provide other optical elements on the transmission path of the first light L1 and the third light L3, and the optical element is provided with the filter film 150. Alternatively, in another example, the filter film 150 may be a separate component disposed on the transmission path of the first light L1 and the third light L3, and the 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 emitted from the third light source 160. Transfer to the second beam splitter 170. In the present embodiment, the second beam splitter 170 passes the first light L1 and the third light L3 and reflects the fourth light L4. That is, the second dichroic mirror 170 is disposed on the transmission paths 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 is equalized by the light uniform element 180 located on the transmission path of the illumination light L5, and then transmitted to the light valve 210. In detail, in the present 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 illumination light L5 into the 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 diffusion sheet 190 can adjust the power distribution of the second light ray L2 passing through the diffusion sheet 190, for example, and the power of the second light ray L2 can also be adjusted by the voltage or current that drives the second light source 120. 4 is a graph showing the conversion efficiency of converted light to the half-height energy density of the second light in the presence or absence of a diffuser in some embodiments of the present invention. Referring to FIG. 1 and FIG. 4 simultaneously, in FIG. 4, the horizontal axis indicates "half-height energy density" indicating that the second light source 120 emits a half-height energy density of the second light L2 in units of watts/mm square (W). /mm ² ). Further, the vertical axis indicates "efficiency" indicating the conversion efficiency of the second light ray L2 converted into the converted light ray CL by the wavelength conversion material layer 136, and the unit is lumens per watt (lm/W). In FIG. 4, the data points of the square are data points where the light source device 100 is not provided with the diffusion sheet 190, and the data points of the diamond shape are the data points of the light source device 100 having the diffusion sheet 190. Specifically, when the half-height energy density of the second light ray L2 is too small, the phosphor powder of the wavelength conversion material layer 136 absorbs, for example, the second light ray L2, and does not convert the corresponding converted light ray CL, thereby causing the conversion. Inefficient. In addition, when the half-height energy density of the second light ray L2 is too large, the phosphor powder of the wavelength conversion material layer 136 may, for example, undergo a thermal quench effect, resulting in poor conversion efficiency. In the present embodiment, if a better conversion efficiency is to be achieved, the half-height width energy density of the second light ray L2 falls between 5 and 60 watts/mm square to achieve a basic effect. Preferably, the half-height energy density of the second light ray L2 falls, for example, at 5 to 30 watts/mm square. In addition, when the half-height energy density of the second light L2 falls at 5 to 21 watts/mm square, the conversion efficiency of the phosphor to convert the second light L2 into the converted light CL can be optimized. For example, in the present embodiment, the second light ray L2 has a full width at half maximum energy density of 20.8 watts/mm square. In addition, under the maximum operating conditions, after the light source device 100 is provided with the diffusion sheet 190, the above conversion efficiency may be increased by, for example, 9.5%.

With continued reference to FIG. 1 , in the embodiment, the light source device 100 further includes a plurality of optical lenses 101 , 103 , 105 , 106 , 107 , 109 and a mirror 102 , and the optical lenses 101 , 103 , 105 , 106 , 107 The 109 and the mirror 102 are at least used to guide the advancement of the first light L1, the second light L2, the third light L3, and the fourth light L4. In addition, the projection device 200 further includes a plurality of obliquely disposed optical lenses 201, 203 and prisms 202, and these optical lenses 201, 203 and prisms 202 are used to guide at least the illumination light L5 and the projection light L6. Specifically, the number and arrangement positions of the optical lenses 101, 103, 105, 106, 107, 109, 201, 203, the mirror 102, the prism 202, and other optical components are used for illustration only, and are not intended to limit the present invention. invention.

In this embodiment, since the mirror 130 is configured to receive the second light L2 and output the third light L3, the light source device 100 may not adopt a light combining structure of the fluorescent powder wheel that penetrates and reflects. In addition, it is not necessary to provide a region through which the blue light can pass through on the mirror 130 as a fluorescent wheel, and the light source device 100 does not have to be provided with an optical path structure for guiding the blue light penetrating the fluorescent wheel. In addition, blue light among the illumination light L5 can be provided by the third light source 160. Therefore, the light source device 100 can have a relatively simplified optical path architecture. The light source device 100 has fewer optical components, so that the assembly man-hour 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 band corresponding to the blue light among the third light rays L3, and thus pass the filter. The third light ray L3 of the film 150 has a relatively pure green color, which makes the projection device 200 employing the light source device 100 have a wider color gamut. In addition, based on the optical path architecture 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 color. The second light ray L2, therefore, the first beam splitter 140 can be designed to pass through the light band corresponding to green. The coating coating design of the spectroscope that allows passage of a single color of light band is relatively simple and relatively easy to manufacture, relative to multiple optical bands that allow for discontinuities and different colors. Therefore, the first beam splitter 140 is less difficult to manufacture and lower in cost, which makes the light source device 100 using the first beam splitter 140 more cost effective.

FIG. 5 is a schematic structural diagram of a light source device and a projection device using the same according to another embodiment of the present invention. Referring 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 of FIG. 1, and the differences are as follows. In the present 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 of FIG. 1 for receiving the second light L2 from the second source 120. The output includes a third light L3 of a third color. Specifically, in the 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 may 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 ray L3 includes a converted ray CL of a third color and an unconverted ray of a second color. Further, the third light ray L3 is emitted, for example, on the reflective substrate 530 and is emitted in a direction away from the reflective substrate 530. In detail, the light source device 500 and the projection device 600 can at least obtain technical effects similar to those of the light source device 100 and the projection device 200 in the embodiment of FIG. The light source device 500 has a simplified optical path architecture, and the projection device 600 using the light source device 500 has a wider color gamut and is more cost effective.

In summary, in the related embodiment of the present invention, since the mirror 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 disposed on the transmission paths of the first light and the third light, so that 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 optical path architecture of the light source device, the beam splitter of the light source device can be designed to pass the light band corresponding to the third color, so that the light source device is more cost effective.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100, 500‧‧‧ light source device

101, 103, 105, 106, 107, 109, 201, 203‧‧‧ optical lenses

102, 130‧‧‧ mirror

110‧‧‧First light source

120‧‧‧second light source

132‧‧‧Substrate

134‧‧‧reflective layer

136‧‧‧wavelength conversion material layer

138‧‧‧Motor

140‧‧‧First Beamsplitter

150‧‧‧Filter film

160‧‧‧ Third light source

170‧‧‧Second beam splitter

180‧‧‧Light uniform components

190‧‧‧Diffuser

200, 600‧‧‧projector

202‧‧ ‧ Prism

210‧‧‧Light valve

220‧‧‧Projection lens

530‧‧‧Reflective substrate

536‧‧‧Fluorescent powder layer

CL‧‧‧ Converting light

I, II, III‧‧‧ areas

L1‧‧‧First light

L2‧‧‧second light

L3‧‧‧3rd light

L4‧‧‧fourth light

L5‧‧‧Lighting

L6‧‧‧projection light

S1‧‧‧ first surface

S2‧‧‧ second surface

S3, S4, S5‧‧‧ surface

1 is a schematic block diagram of a light source device and a projection device using the same according to an embodiment of the invention. 2 is a simplified diagram of the light transmittance of the first surface of the first beam splitter in the embodiment of FIG. 1 versus the wavelength of the light. 3 is a graph showing normalized light intensity versus wavelength for a third ray exiting the mirror in the embodiment of FIG. 1. 4 is a graph showing the conversion efficiency of converted light to the half-height energy density of the second light in the presence or absence of a diffuser in some embodiments of the present invention. FIG. 5 is a schematic structural diagram of a light source device and a projection device using the same according to another embodiment of the present invention.

Claims (10)

A light source device comprising: a first light source for outputting a first light comprising a first color; a second light source for outputting a second light comprising a second color; a mirror disposed on In the transmission path of the second light, the mirror has a light reflecting layer and a wavelength conversion material layer disposed on the light reflecting layer, the mirror receives the second light and outputs a third light, and the third light A third color is included; and a filter film is disposed on the first light and the third light transmission path. The light source device of claim 1, wherein the mirror 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. The light source device of claim 1, wherein the filter film is used to remove the second color. The light source device of claim 1, further comprising a first beam splitter disposed on the transmission path of the first light, the second light, and the third light, the first beam splitter having a first a surface and a second surface, the first surface reflecting the second light to the mirror and allowing at least a portion of the third light to penetrate, the second surface reflecting the first light, wherein leaving the first At least a portion of the third ray of the beam splitter and the first ray exiting the first beam splitter pass through the filter film. The light source device of claim 4, further comprising a third light source and a second beam splitter, the third light source for outputting a fourth light including the second color, and the second beam splitter The second beam, the third light, and the first light are disposed on the transmission path, wherein the second beam splitter combines the first light, the third light, and the fourth light. The light source device of claim 1, further comprising a diffuser disposed on the transmission path of the second light, the diffusion sheet being disposed between the second light source and the mirror. The light source device of claim 1, wherein the first color, the second color, and the third color are respectively in a wavelength range of red, blue, and green. A light source device comprising: a first light source for outputting a first light comprising a first color; a second light source for outputting a second light comprising a second color; a reflective substrate having a phosphor layer, and the phosphor layer is configured to receive the second light and output a third light including a third color; and a first beam splitter disposed on the first light and the second light And the first beam splitter has a first surface and a second surface, the first surface reflects the second light to the reflective substrate, and the third light includes the At least a portion of the third color passes and the second surface reflects the first light. The light source device of claim 8, further comprising a filter film disposed on the first light and the third light transmission path, leaving at least a portion of the third light of the first beam splitter And the first light exiting the first beam splitter passes through the filter film, wherein at least a portion of the third light exiting the beam splitter includes the third color and the second color, and the filter film is used to move In addition to the second color. The light source device of claim 9, further comprising a third light source and a second beam splitter, the third light source for outputting a fourth light including the second color, and the second beam splitter The second beam, the third light, and the first light are disposed on the transmission path, wherein the second beam splitter combines the first light, the third light, and the fourth light.