WO2022037196A1 - Three-color light source device and projection display device - Google Patents

Abstract

A three-color light source device comprises: a first red light source part (R), a second red light source part (DR), a blue light source part (B) and a green light source part, and multiple light splitting optical filters (01, 02, 03). The first red light source part (R) and the second red light source part (DR) output red light beams of different wavelength bands. The first red light source part (R), the second red light source part (DR), the blue light source part (B) and the green light source part output light rays, and light spots of the light rays are overlapped and mixed by means of the light splitting optical filters (01, 02, 03). The three-color light source device comprises two red light source parts (R, DR) outputting red light beams of different wavelength bands, and the output light rays from different colored light source parts and the two red light source parts (D, DR) are combined by means of the light splitting optical filters (01, 02, 03), thereby increasing the brightness of the output light rays without increasing the etendue of the output light rays of the three-color light source device, and thus improving, to a certain degree, display effects of the light source device when used in a projection display device. Also provided is a projection display device having said beneficial effects.

Description

A three-color light source device and projection display device technical field

The present invention relates to the technical field of optical devices, in particular to a three-color light source device and a projection display device.

Background technique

The light source is one of the key components in the projection display device, and the working efficiency of the light source is one of the decisive factors affecting the display effect of the projection display device. The light source in the projection display device generally adopts three-color light source, so the light source in the projection display device includes red, blue, and green three-color channels, and the projection illumination light is output through the combined light of the three-color channels. However, the color brightness of the light output by the light source device using the three-color channel is relatively low at present, and it is difficult to meet the lighting brightness requirements of the light source in the projection display device.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a three-color light source device and a projection display device, which are beneficial to improve the display effect of the projection display device.

In order to solve the above technical problems, the present invention provides a three-color light source device, a first red light source part, a second red light source part, a blue light source part, a green light source part, and a plurality of light splitting filters;

Wherein, the first red light source part and the second red light source part output red light beams with different wavelength bands, the first red light source part, the second red light source part, the blue light source part and the The light output by the green light source part is mixed and output through the overlapping and mixing of the light spots of each of the light splitting filters

Optionally, the directions of the output light of the first red light source part and the second red light source part are perpendicular to each other;

A first dichroic filter is arranged at the intersection of the optical axes of the first red light source part and the second red light source part, and is used for outputting the light output of the first red light source part and the second red light source part. One of the two red light beams is reflected and the other light beam is transmitted, so as to combine the output of the two red light beams to obtain a first combined light beam.

Optionally, the directions of outputting light from the green light source part and the blue light source part are perpendicular to each other; a second light splitting filter is arranged at the intersection of the optical axes of the green light source part and the blue light source part, It is used for reflecting one of the green light and the blue light output by the green light source part and the blue light source part and transmitting one light, so as to combine the green light and the blue light for output , obtain the second combined ray;

The directions of the first combined light and the second combined light are perpendicular to each other, and a third light splitting filter is arranged at the position where the first combined light and the second combined light cross each other, which is used for One of the combined light rays and the second combined light rays reflects the other light rays and transmits.

Optionally, the direction of the first combined light and the direction of the green light output by the green light source part are perpendicular to each other, and a second light splitting filter is provided at the intersection of the first combined light and the green light, for combining and outputting the first combined light and the green light;

It also includes a third dichroic filter disposed on the light path of the blue light source part for outputting blue light, for combining the blue light with the green light and the first combined light for output.

Optionally, it includes a second dichroic filter disposed on the optical path of the blue light source part outputting blue light, and the second dichroic filter and the first dichroic filter are crossed to form X lens structure; the second dichroic filter reflects the blue light and transmits the two red light beams; the X lens structure combines the blue light and the two red light beams to output to obtain the second merged ray;

A third dichroic filter is arranged on the second combined light output light path and the light path of the green light output by the green light source part.

Optionally, the directions of the two red light beams output by the first red light source part and the second red light source part are opposite, and the light paths are located on the same straight line;

An X lens mechanism formed by a first dichroic filter and a second dichroic filter is arranged between the first red light source part and the second red light source part; the first dichroic filter is used for reflection The output light of the first red light source part, the second light splitting filter is used to reflect the output light of the second red light source part, so that the first red light source part and the second red light source part The light is combined and output through the X lens mechanism to obtain the first combined light;

The directions of output light of the green light source part and the blue light source part are perpendicular to each other; One of the two beams of green light and blue light output by the green light source part and the blue light source part is reflected and the other is transmitted, so that the green light and the blue light are combined and output to obtain a second light. combine rays;

The directions of the first combined light and the second combined light are the same, and the X lens mechanism is located on the output light path of the third dichroic filter, or the third dichroic filter is located on the X lens on the output optical path of the mechanism.

Optionally, the green light source part includes a first excitation light source, a second excitation light source, a wavelength converter and a fourth dichroic filter;

The first excitation light source and the wavelength converter are attached and arranged, the fourth light splitting filter is arranged on the output light path of the second excitation light source, and the excitation light output by the second excitation light source is incident to the second excitation light source. a surface of the wavelength converter facing away from the first excitation light source;

The wavelength converter is respectively excited by the first excitation light source and the second excitation light source to generate green excitation light, which is transmitted and emitted through the fourth spectral filter.

Optionally, the wavelength converter is a wavelength conversion material layer disposed on the surface of the chip of the first excitation light source.

A projection display device, comprising the three-color light source device according to any one of the above, a display chip disposed on an output optical path of the three-color light source device, and an output lens disposed on the output optical path of the display chip;

The three-color light source device emits mixed light of red light, blue light and green light to the display chip, and reflects the projection light carrying image information on the surface of the display chip to the output lens. Light is output through the output lens.

Optionally, a fly-eye lens, a polarization converter, a condenser lens and a PBS are arranged between the three-color light source device and the display chip;

The mixed light output by the three-color light source device is transmitted and incident on the display chip through the fly-eye lens, the condenser lens and the PBS in sequence; the projection light output by the display chip is reflected and incident on the display chip through the PBS. Describe the output lens.

Optionally, the PBS is three-dimensional PBS or Film PBS.

Optionally, a fly-eye lens, a condenser lens, and a prism are arranged between the three-color light source device and the display chip;

The mixed light output by the three-color light source device is transmitted and incident to the display chip through the fly-eye lens, the condenser lens and the prism in sequence; the projection light output by the display chip is reflected by the prism and incident to the display chip. Describe the output lens.

Optionally, the prism includes a right-angle prism and an obtuse-angle prism that are attached to each other, or the prism is a right-angle prism.

Optionally, a first condenser lens, a light guide rod, a second condenser lens and a prism group are sequentially arranged between the three-color light source device and the display chip;

The prism group includes a right-angle prism and an obtuse-angle prism, and the hypotenuse surface of the right-angle prism and the longest-side surface of the obtuse-angle prism are arranged to fit each other;

The mixed light output by the three-color light source device sequentially passes through the first condensing lens, the light guide rod, the second condensing lens and the obtuse angle prism, and passes through the obtuse angle prism and the right angle prism The attached surface is reflected to the display chip; the projection light output by the display chip is transmitted to the output lens through the right-angle prism and the obtuse-angle prism.

A three-color light source device provided by the present invention includes: a first red light source part, a second red light source part, a blue light source part, a green light source part, and a plurality of light splitting filters; wherein, the first red light source part The output of the red light source and the second red light source are red light beams with different wavelength bands, and the light output by the first red light source, the blue light source and the green light source is overlapped and mixed by the light spots of the light splitting filters.

The three-color light source device of the present application includes two red light source parts outputting red light with different wavelength bands, and the light output by each different color light source part and the light output by the two red light source parts is combined by a light combining sheet, and the light output is not increased. Based on the spot size of the light output by the large three-color light source device, the brightness of the output light is improved, thereby improving the display effect of the light source device when applied in the projection display device to a certain extent.

The present application also provides a projection display device, which has the above beneficial effects.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following will briefly introduce the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic diagram of an optical path structure of a three-color light source device provided by an embodiment of the present invention;

2 is a schematic diagram of another optical path structure of a three-color light source device provided by an embodiment of the present invention;

3 is a schematic diagram of another optical path structure of a three-color light source device provided by an embodiment of the present invention;

4 is a schematic diagram of another optical path structure of a three-color light source device provided by an embodiment of the present invention;

5 is a schematic diagram of another optical path structure of a three-color light source device provided by an embodiment of the present invention;

6 is a schematic diagram of an optical path structure of a projection display device provided by an embodiment of the present invention;

7 is a schematic diagram of another optical path structure of a projection display device provided by an embodiment of the present invention;

8 is a schematic diagram of another optical path structure of a projection display device provided by an embodiment of the present invention;

9 is a schematic diagram of another optical path structure of a projection display device provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of another optical path structure of the projection display device provided by the embodiment of the present invention.

detailed description

In a three-color light source device, to increase the brightness of the light output from the light source, the most conventional way is to increase the light-emitting area or quantity of the light source of the same color. Arrays are often used to increase the number of light sources of the same color. Although this method can increase the brightness of the light source, it also increases the light spot, that is, the etendue, which increases the difficulty of the subsequent optical system collection and reduces the collection efficiency. The efficiency of the system does not increase much, but it will increase the volume and power of the system, and increase the cost. Therefore, this application provides a light source that can improve the three-color light source device without increasing the etendue of the system. Brightness, and can improve the vividness of the picture, that is, increase the color gamut.

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1 to FIG. 5 , FIG. 1 to FIG. 5 are schematic diagrams of five different optical path structures of a three-color light source device provided in an embodiment of the application, and the three-color light source device may include:

a first red light source part R, a second red light source part DR, a blue light source part B, a green light source part, and a plurality of light splitting filters;

The first red light source part R and the second red light source part DR output red light beams with different wavelength bands, and the light output by the first red light source part R, the second red light source part DR, the blue light source part B and the green light source part pass through The light spots of each spectral filter are overlapped and mixed for output.

The three-color light source device in this embodiment is provided with two red light source parts, and the wavelength ranges of the red light output by the two red light source parts are different, and the light of different wavelength bands can be combined by the light splitting filter.

It should be noted that the light splitting filter can be a dichroic mirror. The principle of light combining is to reflect the light of the first wavelength band and transmit the light of the second wavelength band of the two beams to be combined and output. Then, these two The light propagation directions of the wavelength bands are perpendicular to each other, then the beam splitting filter is set at the intersection of the light paths of the two wavelength bands, and the two beams of light are incident on two different surfaces of the beam splitting filter at an angle of 45 degrees, then After the light of the first wavelength band is reflected and the light of the second wavelength band is transmitted, the optical paths of the two beams of light can be spatially overlapped, and the two beams of different wavelengths can be realized without increasing the spot (that is, not increasing the etendue of the light source). Combination of rays.

In addition, in FIG. 1 to FIG. 5 , in the optical path of the two beams of light that are perpendicular to each other through the light splitting filter, in order to display the light conversion direction more clearly, the overlapping of the optical path and the spot after the light rays overlap is not shown in the figures. , but in the actual light path, the combined light path and light spot should be coincident.

Therefore, the red light of the two different wavelength bands output by the two red light source parts in this embodiment can be combined by using the light splitting filter to increase the brightness of the red light without increasing the spot size. At the same time, the red light The combination of light, green light and blue light is also combined by the light splitting filter, which avoids the problem that the light spot increases due to the combination of light of different colors.

In addition, for three-color light source devices, the blue light is often required to account for a small proportion, so there is no need to set up multiple blue light with different wavelength bands to combine light, and the green light source itself is difficult to generate narrow-band green light. A combination of green rays.

In order to further increase the output brightness of green light in the three-color light source device, in the present application, the green light source part can be excited to output green light by using a wavelength converter.

The green light source part may include: a first excitation light source, a second excitation light source BP, a wavelength converter G, and a spectral filter.

The wavelength converter G is a wavelength converter capable of double-sided excitation, and the wavelength converter G is attached to the first excitation light source, so that the excitation light of the first excitation light source can be directly irradiated on the wavelength converter G. In order to Increase the brightness of the green light output by the wavelength converter G. In this embodiment, a second excitation light source BP is also used to output a second beam of excitation light. The excitation light is reflected and incident on the wavelength converter G through the spectral filter. The output green light is transmitted and emitted through the light splitting filter, so as to realize the separation of the excitation light and the excited light.

By exciting the wavelength converter on both sides, the working efficiency of the wavelength converter G is improved to a certain extent, thereby improving the brightness of the green light output by the wavelength converter G, thereby meeting the demand for improving the brightness of the output light of the three-color light source device. Further, in order to simplify the structure of the light source device, the wavelength converter may be a wavelength conversion material layer directly disposed on the surface of the chip of the first excitation light source.

The three-color light source device provided in this application improves the brightness of the three-color light source device without increasing the spot size by setting red light source parts with different wavelength bands and using a spectral filter to realize the combination of light in different wavelength bands. It is beneficial to ensure the effect of projection display when the three-color light source device is applied in the projection display device.

There are many different light paths for combining the light output from the first red light source part R, the second red light source part DR, the green light source part and the blue light source part B. The following will be described with specific examples.

In an optional embodiment, the first red light source part R and the second red light source part DR output two different wavelength bands of red light output perpendicular to each other, and a spectral filter is provided at the intersection of the optical paths of the two red light beams. The light-splitting filter reflects the red light of one wavelength band and transmits the red light of the other wavelength band, thereby realizing the combined output of the two red light beams to form a combined red light.

On the basis of combining two red light beams into one combined red light beam; it can be further combined with green light and blue light. The principle of combining is the same as the combining principle of two red light beams. A light splitting filter is set at the cross position of the beams of light, and one beam of light is reflected and the other beam of light is transmitted, so as to realize the combined output of light.

For example, as shown in FIG. 5 , the combined red light can be combined with the green light through a light splitting filter to form the same light beam, and then combined with the blue light through another light splitting filter to form the same light beam.

The three-color light source device shown in FIG. 5 may include: a first excitation light source, a second excitation light source BP, a wavelength converter G, a blue light source part B, a first red light source part R, and a second red light source part DR, dichroic filter 1 01, dichroic filter 2 02, dichroic filter 3 03;

The second excitation light source BP is blue excitation light, and the blue excitation light output by the second excitation light source BP is reflected and incident on the wavelength converter G through the spectral filter 1 01, and the wavelength converter G is affected by the first excitation light source and the second excitation light source. The light output by the BP is excited, and green light is output, and the green light is transmitted and emitted through the spectral filter 1 01 . The light splitting filter 1 01 in this embodiment may only transmit green light and reflect light of other colors.

For the first excitation light source, a green light excitation light source, such as a green light LED chip, can be used. The green light excitation light source can radiate green light after excitation to generate green light, so as to further improve the utilization rate of the excitation light. The second excitation light source BP may use blue excitation light.

The two red light beams of different wavelength bands output by the first red light source part R and the second red light source part DR are combined and output by the second light splitting filter 02, and the second light splitting filter 02 is only for the first red light. The light of the light source part DR is transmitted and reflected to the light of the second red light source part DR, and then the red light is combined and outputted.

Because the spectral filter 1 only transmits the green light and reflects other light, the combined red light can be incident on the spectral filter 1 01, and the red light and the green light are combined, and then pass through the spectral filter. Three 03 combined with blue light output.

Also, as shown in FIG. 1 , after combining the red light rays output by the first red light source part R and the second red light source part DR into combined red light rays, the green light rays and the blue light rays can be combined first through a light splitting filter. For the same combined light beam, the two combined light beams are further combined by another beam splitting filter.

In the three-color light source device shown in FIG. 1 , the second excitation light source BP is blue excitation light, and the first excitation light source and the second excitation light source BP excite the wavelength converter to output green light through the spectral filter 101. The optical path and diagram 5 is the same and will not be repeated here. The two red light beams of different wavelength bands output by the first red light source part R and the second red light source part DR are combined and output through the light splitting filter 2 02 . Because the spectral filter 1 01 can reflect the blue light, the light output by the blue light source part B in this embodiment can be combined with the green light through the spectral filter 1 01 to improve the utilization of the spectral filter 1 01 Rate. The combined light obtained by combining the green light and the blue light and the light obtained by combining the two red lights are combined and output through the light splitting filter 303.

Also, as shown in FIG. 4 , after combining the red light rays output by the first red light source part R and the second red light source part DR into combined red light rays, the combined red light rays and blue light rays can be combined through a light splitting filter first. It is the same beam of light, which is then combined with the green light through another light splitting filter to output.

In the three-color light source device shown in FIG. 4 , the second excitation light source BP is blue excitation light, and the first excitation light source and the second excitation light source BP excite the wavelength converter G to output green light through a spectral filter 101. The optical path is the same as that shown in FIG. 1 . 5; the first red light source part R and the second red light source part DR output two beams of red light with different wavelength bands, through the light splitting filter two 02 for combined light output, the optical path and Figure 1, Figure 5 are the same, and will not be repeated here. Further, the combined output of two red light beams with different wavelength bands and the blue light output that can pass through the third light splitting filter 03 and the blue light source part are combined and output. In the X lens mechanism, the blue light output from the blue light source part B and the red light output from the second red light source part DR have opposite directions and are collinear. It can be seen that the X lens mechanism can realize the light combining of three wavelength bands, and can reduce the space occupied by the optical path.

After the two red lights and one blue light are combined, the light is further passed through the light splitting filter 1 01 and the green light is combined for output.

Of course, in the actual application process, the light of the first red light source part R and the light of the second red light source part DR are not necessarily output perpendicular to each other. As shown in FIG. 2 and FIG. 3 , the output light directions of the first red light source part R and the second red light source part DR are opposite and collinear, and the light can be combined and output by the X lens mechanism arranged to cross each other. As mentioned above, the X-lens mechanism can realize light combining in three different wavelength bands. Therefore, as shown in FIG. 2 , the blue light and the green light can be combined by the light splitting filter and then incident in the direction perpendicular to the light of the first red light source part R and the light of the second red light source part DR To the X lens mechanism, the combined output of three colors of light is realized. Also as shown in Figure 3, the light output by the green light source part can be combined and output by the X lens mechanism, and then output by another light splitting filter and blue light. quantity.

In the light source device shown in FIG. 2 , the second excitation light source BP is blue excitation light, and the blue excitation light output by the second excitation light source BP is reflected and incident on the wavelength converter G through the spectral filter 1 01 , and the wavelength converter G Excited by the light output by the first excitation light source and the second excitation light source BP, green light is output; at the same time, the blue light output by the blue light source part B is incident on the light splitting filter 1 01 perpendicular to the direction of the green light, so as to realize the blue light and the green light. Combined light of green light; the first red light source part and the second red light source part combine light through the X lens mechanism formed by the dichroic filter 2 02 and the dichroic filter 3 03, and the blue light and the green light are incident to the The X lens mechanism realizes the light combination of three colors.

Of course, the positions between the X lens mechanism formed by the second light splitting filter 02 and the third light separation filter 03 and the first light separation filter 01 can be relatively interchangeable. As shown in FIG. 2 , the X lens mechanism is set on the On the output optical path of the light sheet 1 01, as shown in Fig. 3, the light splitting filter 1 01 is arranged on the output optical path of the X lens mechanism, and the optical path structure principle is the same.

The present application further provides a projection display device, as shown in FIGS. 6 to 10 . FIGS. 6 to 10 are schematic diagrams of five different optical path structures of the projection display device provided by the embodiments of the present application. The projection display device may include any one of the above three-color light source devices, a display chip disposed on the output optical path of the three-color light source device, and an output lens disposed on the output optical path of the display chip;

The three-color light source device 1 emits the mixed light of red light, blue light and green light to the display chip 2, and reflects the projection light carrying the image information on the surface of the display chip 2 to the output lens 3, and the projection light is output through the output lens 3 .

In this embodiment, the three-color light source device 1 increases the brightness of the light on the basis of increasing the light spot, thereby improving the display effect of the projected light of the projection display device.

Further, between the three-color light source device 1 and the display chip 2, a fly-eye lens 4, a polarization converter 5, a condenser lens 6 and a PBS are also provided;

The mixed light output by the three-color light source device 1 is transmitted to the display chip 2 through the fly-eye lens 4, the polarization converter 5, the condenser lens 6 and the PBS in turn; the projected light reflected from the surface of the display chip 2 is reflected by the PBS and incident to the output lens 3.

As shown in FIG. 6 and FIG. 7 , the PBS (polarizing beam splitter) can be a Film PBS 71 with a sheet-like structure or a three-dimensional PBS 72 with a three-dimensional structure, which is not limited in this application. The fly-eye lens 4 in this embodiment can evenly light the light output by the three-color light source device 1 to obtain white light with a more uniform and brighter color.

The present application also provides an embodiment in which any of the above three-color light source devices is applied to a DLP projection display device. As shown in FIG. 8 and FIG. 9 , compound eyes are arranged between the three-color light source device 1 and the display chip 2 Lens 4, condenser lens 6 and prism;

The mixed light output from the three-color light source device 1 is transmitted to the display chip 2 through the fly-eye lens 4 , the condenser lens 6 and the prism in sequence;

The prism in this embodiment may only be a right-angle prism 81 , or may also include a prism formed by splicing a right-angle prism 81 and an obtuse-angle prism 82 together, as long as it can finally transmit light to the light path and then reflect the light reflected from the display chip 2 The direction of the optical path is deflected so that the light enters the output lens 3 .

As mentioned above, the fly-eye lens 4 is mainly used to homogenize the light output by the three-color light source device 1 , but in practical application, it is not limited to using the fly-eye lens 4 to homogenize the light. Therefore, as shown in FIG. 10 , in another optional embodiment of the present application, a first condenser lens 61 , a light guide rod 9 , a second condenser lens 61 , a light guide rod 9 , and a second condenser may be arranged between the three-color light source device and the display chip 2 in sequence. Optical lens 62 and prism group.

The prism group includes a right angle prism 81 and an obtuse angle prism 82, and the hypotenuse surface of the right angle prism 81 and the longest side surface of the obtuse angle prism 82 are oppositely arranged;

The mixed light output from the tricolor light source device 1 passes through the first condenser lens 61 , the light guide rod 9 , the second condenser lens 62 and the obtuse prism 82 in sequence, and is reflected to the display by the surface on which the obtuse prism 82 and the right angle prism 81 are attached. Chip 2; the projection light reflected by the display chip 2 is transmitted to the output lens 3 through the right angle prism 81 and the obtuse angle prism 82.

In this embodiment, the light guide rod 9 is used to realize the uniform light output of the three-color light source device 1, and is incident into the obtuse angle prism 82 through the second condenser lens 62, and is reflected and incident to the display at the interface between the obtuse angle prism 82 and the right angle prism 81. Chip 2, the projection light reflected and emitted by the display chip 2 is incident on the obtuse-angle prism 82 and the right-angle prism 81 again, and is transmitted and incident on the output lens 3.

Of course, the structure and angle of the two prisms can also be properly adjusted, so that the light incident on the prism group first transmits and enters the display chip 2, and then reflects and deflects the projection light reflected from the display chip 2 and enters the output lens 3. There are no specific restrictions in the application.

The projection display device in this application can be applied to DLP and LCOS projectors, and can also be applied to other projection systems, which is not specifically limited in this application.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising," "comprising," or any other variation thereof are intended to encompass a non-exclusive inclusion such that elements inherent to a process, method, article, or apparatus of a list of elements are included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element. In addition, parts of the above technical solutions provided in the embodiments of the present application that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail, so as to avoid redundant descriptions.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments may be referred to each other.

Claims (14)

A three-color light source device is characterized in that it comprises: a first red light source part, a second red light source part, a blue light source part and a green light source part, and a plurality of light splitting filters; Wherein, the first red light source part and the second red light source part output red light beams with different wavelength bands, the first red light source part, the second red light source part, the blue light source part and the The light output by the green light source part is superimposed and mixed for output through the light spots of each of the light splitting filters. The three-color light source device according to claim 1, wherein the directions of the output light of the first red light source part and the second red light source part are perpendicular to each other; A first dichroic filter is arranged at the intersection of the optical axes of the first red light source part and the second red light source part, and is used for outputting the light output of the first red light source part and the second red light source part. One of the two red light beams is reflected and the other light beam is transmitted, so as to combine the output of the two red light beams to obtain a first combined light beam. The three-color light source device according to claim 2, characterized in that, the directions of output light of the green light source part and the blue light source part are perpendicular to each other; A second light-splitting filter is arranged at the intersection of the axes, which is used to reflect one of the two beams of light outputted by the green light source part and the blue light beam outputted by the blue light source part, so as to transmit the other beams. combining and outputting the green light and the blue light to obtain a second combined light; The directions of the first combined light and the second combined light are perpendicular to each other, and a third light splitting filter is arranged at the position where the first combined light and the second combined light cross each other, which is used for One of the combined light rays and the second combined light rays reflects the other light rays and transmits. The three-color light source device according to claim 2, wherein the direction of the first combined light and the direction of the green light output by the green light source part are perpendicular to each other, and the first combined light and the green light are perpendicular to each other. A second light splitting filter is arranged at the intersection of the light rays, which is used to combine the first combined light and the green light for output; It also includes a third dichroic filter disposed on the light path of the blue light source part for outputting blue light, for combining the blue light with the green light and the first combined light for output. The three-color light source device according to claim 2, characterized in that it comprises a second dichroic filter arranged on the light path of the blue light source part outputting blue light, and the second dichroic filter and The first dichroic filters are crossed to form an X lens structure; the second dichroic filter reflects the blue light and transmits two beams of the red light; the X lens structure transmits the blue light The light and the two red rays are combined and output to obtain a second combined light; It also includes a third light splitting filter disposed on the second combined light output light path and the light path of the green light output by the green light source part. The three-color light source device according to claim 1, wherein the directions of the two red light beams output by the first red light source part and the second red light source part are opposite, and the light paths are located on the same straight line; An X lens mechanism formed by a first dichroic filter and a second dichroic filter is arranged between the first red light source part and the second red light source part; the first dichroic filter is used for reflection The output light of the first red light source part, the second light splitting filter is used to reflect the output light of the second red light source part, so that the first red light source part and the second red light source part The light is combined and output through the X lens mechanism to obtain the first combined light; The directions of output light of the green light source part and the blue light source part are perpendicular to each other; One of the two beams of green light and blue light output by the green light source part and the blue light source part is reflected and the other is transmitted, so that the green light and the blue light are combined and output to obtain a second light. combine rays; The directions of the first combined light and the second combined light are the same, and the X lens mechanism is located on the output light path of the third dichroic filter, or the third dichroic filter is located on the X lens on the output optical path of the mechanism. The three-color light source device according to any one of claims 1 to 6, wherein the green light source part comprises a first excitation light source, a second excitation light source, a wavelength converter, and a fourth dichroic filter; The first excitation light source and the wavelength converter are attached and arranged, the fourth light splitting filter is arranged on the output light path of the second excitation light source, and the excitation light output by the second excitation light source is incident to the second excitation light source. a surface of the wavelength converter facing away from the first excitation light source; The wavelength converter is respectively excited by the first excitation light source and the second excitation light source to generate green excitation light, which is transmitted and emitted through the fourth spectral filter. The three-color light source device according to claim 7, wherein the wavelength converter is a wavelength conversion material layer disposed on the surface of the chip of the first excitation light source. A projection display device, characterized in that it comprises the three-color light source device according to any one of claims 1 to 8, a display chip arranged on an output light path of the three-color light source device, and a display chip arranged on the display chip The output lens on the output optical path; The three-color light source device emits mixed light of red light, blue light and green light to the display chip, and reflects projection light carrying image information on the surface of the display chip to the output lens, the projection light Light is output through the output lens. The projection display device according to claim 9, wherein a fly-eye lens, a polarization converter, a condenser lens and a PBS are arranged between the three-color light source device and the display chip; The mixed light output by the three-color light source device is transmitted and incident on the display chip through the fly-eye lens, the condenser lens and the PBS in sequence; the projection light output by the display chip is reflected and incident on the display chip through the PBS. Describe the output lens. The projection display device according to claim 10, wherein the PBS is a stereoscopic PBS or a Film PBS. The projection display device according to claim 9, wherein a fly-eye lens, a condenser lens, and a prism are arranged between the three-color light source device and the display chip; The mixed light output by the three-color light source device is transmitted and incident to the display chip through the fly-eye lens, the condenser lens and the prism in sequence; the projection light output by the display chip is reflected by the prism and incident to the display chip. Describe the output lens. The projection display device according to claim 12, wherein the prism comprises a right angle prism and an obtuse angle prism; or the prism is a right angle prism. The projection display device according to claim 9, wherein a first condenser lens, a light guide rod, a second condenser lens and a prism group are sequentially arranged between the three-color light source device and the display chip; The prism group includes a right-angle prism and an obtuse-angle prism, and the hypotenuse surface of the right-angle prism and the longest-side surface of the obtuse-angle prism are arranged to fit each other; The mixed light output by the three-color light source device sequentially passes through the first condenser lens, the light guide rod, the second condenser lens and the obtuse angle prism, and passes through the obtuse angle prism and the right angle prism The attached surface is reflected to the display chip; the projection light output by the display chip is transmitted to the output lens through the right-angle prism and the obtuse-angle prism.

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