CN109765745B - Light source device and projection system - Google Patents
Light source device and projection system Download PDFInfo
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- CN109765745B CN109765745B CN201711099271.7A CN201711099271A CN109765745B CN 109765745 B CN109765745 B CN 109765745B CN 201711099271 A CN201711099271 A CN 201711099271A CN 109765745 B CN109765745 B CN 109765745B
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Abstract
The present invention provides a light source device, including: the excitation light source is used for emitting first primary color excitation light; the color wheel comprises a conversion area and a non-conversion area, wherein the conversion area is used for receiving the first primary color exciting light and generating mixed color excited light, and the non-conversion area is used for receiving the first primary color exciting light and emitting unconverted first primary color light; a supplementary light source for emitting second primary color supplementary light and third primary color supplementary light; and the light guide assembly is used for guiding the second primary color supplement light, the third primary color supplement light and the first primary color light emitted by the color wheel to be emitted from the same emission channel as the mixed color excited light. The invention also provides a projection system applying the light source device. The light source device of the invention emits the primary color light with high brightness and high color purity.
Description
Technical Field
The present invention relates to the field of optical technologies, and in particular, to a light source device and a projection system.
Background
Currently, Spatial Light Modulators (SLM), which generally include LCD, LCOS, DMD, etc., are widely used in the field of projection display. The SLM number is classified into three systems, i.e., a single-chip system, a double-chip system and a triple-chip system, and the double-chip system has the advantage of both light efficiency and cost, and is being widely popularized.
Most of the existing double-chip systems adopt blue laser to excite yellow fluorescent powder to generate sequential blue light and yellow light, and then the yellow light is divided into green light and red light through a light splitting and combining prism, so that red, green and blue tricolor light required by projection is formed. However, since green light and red light are light separated from yellow light, the luminance of red light is insufficient and the color purity is low.
Disclosure of Invention
In view of the above, it is desirable to provide a light source device and a projection system that can improve the brightness and color purity of primary colors.
The present invention provides a light source device, including: the excitation light source is used for emitting first primary color excitation light; the color wheel comprises a conversion area and a non-conversion area, wherein the conversion area is used for receiving the first primary color exciting light and generating mixed color excited light, and the non-conversion area is used for receiving the first primary color exciting light and emitting unconverted first primary color light; a supplementary light source for emitting second primary color supplementary light and third primary color supplementary light; and the light guide assembly is used for guiding the second primary color supplement light, the third primary color supplement light and the first primary color light emitted by the color wheel to be emitted from the same emission channel as the mixed color excited light.
The invention also provides a projection system, which comprises the light source device; a light splitting element configured to split the first primary color light, the mixed-color light-receiving light, the second primary color complementary light, and the third primary color complementary light emitted from the light source device into light transmitted along a first optical path and light transmitted along a second optical path, wherein the mixed-color light-receiving light is separated into the second primary color light and the third primary color light; a first spatial light modulator for modulating light transmitted along a first optical path; and a second spatial light modulator for modulating light transmitted along the second optical path.
The light source device and the projection system provided by the invention are respectively used for supplementing the brightness and the color purity of the second primary color light and the third primary color light formed by separating the mixed-color excited light through the second primary color supplement light and the third primary color supplement light emitted by the supplement light source.
Drawings
Fig. 1 is a schematic structural diagram of a projection system according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a light source device of the projection system shown in fig. 1.
Fig. 3 is a schematic structural diagram of a color wheel of the light source device shown in fig. 2.
Fig. 4 is a color gamut diagram for the projection system shown in fig. 1.
Fig. 5 is a schematic diagram of the turn-off timing of the excitation light source and the supplemental light source provided in this embodiment.
Fig. 6 is an image modulation timing chart of the projection system of the present embodiment.
Fig. 7 is a timing diagram of image modulation for a second embodiment of the projection system of the present invention.
Fig. 8 is a schematic structural diagram of a light source device of a third embodiment of the projection system of the invention.
Fig. 9 is a schematic structural diagram of a color wheel of the light source device shown in fig. 8.
Fig. 10 is a schematic structural diagram of a light source device of a fourth embodiment of the projection system of the invention.
Fig. 11 is a schematic diagram of a laser array of the present embodiment.
Fig. 12 is a schematic structural diagram of the second light combining element in this embodiment.
Fig. 13 is a schematic structural diagram of a light source device of a fifth embodiment of the projection system of the invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention and the scope of the present invention is therefore not limited to the specific embodiments disclosed below. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a projection system according to a first embodiment of the invention. The projection system 100 includes a light source device 10, a light splitting element 20, a first spatial light modulator 60, a second spatial light modulator 70, and a projection lens 80. The light source device 10 is configured to emit a first light and a second light, where the first light includes a first primary color light and a mixed-color excited light, and the second light includes a second primary color complementary light and a third primary color complementary light. It should be noted that the mixed-color stimulated light refers to the fact that the color of the stimulated light is not the three primary colors (three primary colors) of light, and the stimulated light can be separated into two primary colors. The light splitting element 20 is configured to split the first light and the second light into light traveling along a first optical path and light traveling along a second optical path, wherein the mixed-color excited light is split into light of a second primary color and light of a third primary color. The first spatial light modulator 60 is configured to modulate light transmitted along a first optical path, and the second spatial light modulator 70 is configured to modulate light transmitted along a second optical path. The projection lens 80 is used for receiving the projection light generated by the spatial light modulator to perform projection display of an image. It is understood that the projection system 100 further includes a light guiding element for guiding the light emitted from the light splitting element 20 to the first spatial light modulator 60 and the second spatial light modulator 70, respectively. The spatial light modulator may be a DMD spatial light modulator, an LCOS spatial light modulator, or an LCD spatial light modulator, but is not limited thereto.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a light source device of the projection system shown in fig. 1. The light source device 10 includes an excitation light source 120, a supplementary light source 130, a light guiding assembly, a color wheel 160, and a light homogenizing device 180. The excitation light source 120 is configured to emit excitation light of a first primary color of at least one color. In this embodiment, the excitation light source 120 is configured to emit excitation light of a first primary color. The color wheel 160 is configured to receive the first primary color excitation light and emit first light. The supplemental light source 130 is for emitting a second light. The light guide component is used for guiding the first light and the second light to exit from the same exit channel. The light homogenizing device 180 homogenizes the first light and the second light.
The excitation light source 120 may be a blue light source emitting excitation light of a first primary color of blue, but it is understood that the excitation light source 120 is not limited to a blue light source, and may also be a violet light source, a red light source, a green light source, and the like. In this embodiment, the excitation light source 120 is a blue laser, and is configured to emit blue laser as the first primary color excitation light. It is understood that the excitation light source 120 may include one, two or more blue lasers, and the number of the blue lasers may be selected according to actual needs.
The color wheel 160 is located on the optical path of the excitation light of the first primary color. The color wheel 160 comprises at least two segment regions receiving the first primary color excitation light and emitting the first light correspondingly, wherein the first light comprises at least two colors of light, and each segment region emits one color of light correspondingly. Specifically, a wavelength conversion material, such as a fluorescent material, may be disposed on the segment area of the color wheel 160, and the fluorescent material receives the first primary color excitation light to generate fluorescence (mixed color excited light). It is understood that the color wheel 160 may periodically rotate around the center of the circle, such that each segment region is periodically located on the optical path of the excitation light source 120, thereby emitting the first primary color light and the mixed color excited light in time sequence. In this embodiment, the color wheel 160 is a semi-transmissive and semi-reflective color wheel, for example, a part of the segment area is a transmissive area, and another part of the segment area is a reflective area, the propagation direction of a part of the outgoing light of the color wheel 160 is the same as the propagation direction of the incident light, and the propagation direction of a part of the outgoing light is opposite to the propagation direction of the incident light.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a color wheel of the light source device shown in fig. 2. Specifically, the color wheel 160 includes a non-conversion region B and a conversion region Y arranged in a circumferential direction. The non-conversion region B may be disposed on the substrate, and configured to receive the first primary color excitation light, scatter the first primary color excitation light, and emit the first primary color light, where a wavelength range of the first primary color light is the same as a wavelength range of the first primary color excitation light. The conversion region Y is provided with a yellow fluorescent material for receiving the first primary color excitation light to generate a mixed color excited light (yellow excited light). In this embodiment, the non-conversion region B is located in the transmission region, and the conversion region Y is located in the reflection region, that is, the first primary color light is transmitted and emitted by the non-conversion region B, and the mixed color excited light is reflected and emitted by the conversion region Y. It is understood that in an alternative embodiment, the non-conversion region B may be disposed in the reflective region and the conversion region Y may be disposed in the transmissive region. It is understood that in a modified embodiment, the conversion regions may include circumferentially arranged second and third primary color fluorescent regions R and G.
The supplemental light source 130 is disposed on a side of the color wheel 160 facing away from the excitation light source 120, i.e., the supplemental light source 130 and the excitation light source 120 are located on different sides of the color wheel 160. The supplemental light source 130 includes at least one laser for emitting laser light of at least one color as the second light. In this embodiment, the supplemental light source 130 includes a first light emitting element for emitting supplemental light of a second primary color (e.g., red supplemental light), and a second light emitting element for emitting supplemental light of a third primary color (e.g., green supplemental light).
The light guide assembly includes a first light guide assembly 140, a second light guide assembly 150, and a first light combining element 170. In this embodiment, the first light guiding assembly 140 is configured to guide the light emitted from the first side of the color wheel 160 to the first light combining element 170, and the second light guiding assembly 150 is configured to guide the light emitted from the second side of the color wheel 160 opposite to the first side to the first light combining element 170, where the first light emitted from the color wheel 160 and the second light emitted from the supplemental light source 130 are combined at the first light combining element 170 by an expansion amount and then emitted from the same emission channel.
The first light guiding assembly 140 includes a second light combining element 142. The second light combining element 142 is located between the excitation light source 120 and the color wheel 160, and is configured to transmit the first primary color excitation light and reflect the mixed color excited light. In this embodiment, the second light combining element 142 is a lens including a blue-transmitting and yellow-reflecting coating film.
Further, the first light guiding assembly 140 further includes a first collecting lens group 144 and a first condensing lens 146. The first collecting lens group 144 is configured to converge the first primary color excitation light emitted by the excitation light source 120 on the surface of the color wheel 160, and collimate the emergent light of the color wheel 160. In this embodiment, the first collecting lens group 144 is disposed coaxially with the excitation light source 120. The first condenser lens 146 is configured to condense and emit the mixed color received laser light emitted from the second light combining element 142. In this embodiment, the mixed-color received laser light passes through the first light combining element 170 and then is converged on the inlet surface of the dodging device 180.
The second light directing assembly 150 includes a third light combining element 152. The third light combining element 152 is located between the supplemental light source 130 and the color wheel 160, and is configured to transmit the second primary color supplemental light and the third primary color supplemental light and reflect the first primary color light emitted by the color wheel 160. The first primary color light, the second primary color supplement light and the third primary color supplement light are combined by means of an expansion amount at the third light combining element 152. In this embodiment, the third light combining element 152 is a lens including a yellow-transparent and blue-reflective coating.
Further, to obtain a better light-emitting effect, the second light guiding assembly 150 further includes a scattering element 153 disposed between the third light combining element 152 and the first light combining element 170, and configured to perform a coherent elimination process on the second primary color supplemental light, the third primary color supplemental light, and the first primary color light, so as to avoid a speckle phenomenon existing in a light combination of the first light and the second light. In addition, the second light guiding assembly 150 preferably further includes a second collecting lens group 154 and a second condenser lens 156. The second collecting lens group 154 is used for collimating the first primary color light emitted from the color wheel 160 and then emitting the collimated light into the third light combining element 152. The second condenser lens 156 is used for condensing the second primary color supplement light, the third primary color supplement light and the first primary color light on the first light combination element 170. Further, in order to make the structure of the light source device 10 more compact, the second light guiding assembly 150 further includes a first reflecting element 157 for reflecting the second primary color supplement light, the third primary color supplement light and the first primary color light emitted by the third light combining element 152.
The first light combining element 170 may adopt an optical structure with a wavelength division function, that is, light combining is performed according to different wavelength ranges of incident light. As an embodiment of wavelength splitting, the first light combining element 170 is configured to transmit the mixed-color excited light and reflect the second primary color supplemental light, the third primary color supplemental light, and the first primary color light. Specifically, the first light combining element 170 includes a reflective area for reflecting the first primary color light, the second primary color supplemental light, and the third primary color supplemental light, and a transmissive area for transmitting the mixed color excited light. Specifically, the reflective region of the first light combining element 170 is provided with a reflective coating. Since the first primary color light, the second primary color supplement light and the third primary color supplement light are converged in the reflection region (reflection coating), the area of the reflection coating can be designed to be small enough, so that the loss of the mixed color laser light generated by transmitting the reflection region of the first light combining element 170 can be minimized.
The first light and the second light emitted from the first light combining element 170 are homogenized by the light homogenizing device 180 and then emitted to the light splitting element 20.
Referring to fig. 4, fig. 4 is a color gamut diagram of the projection system shown in fig. 1. R1, G1, B1 are the color coordinates of the second primary color supplement light emitted by the supplement light source 130, the third primary color supplement light, and the first primary color light emitted by the excitation light source 120, respectively. R2 and G2 are color coordinates of the second primary color light and the third primary color light separated by the mixed color excited light, respectively. In this embodiment, the color gamut range that the first light and the second light can exhibit may be a DCI color gamut range, for example, the color gamut range DCI-P3, color coordinates of three primary colors are R, G, B, respectively, and color purities of the primary colors are higher. The second primary color light (color coordinate R) of the projection system is formed by mixing the second primary color supplement light (color coordinate R1) and the separated second primary color light (color coordinate R2), namely, the second primary color light is obtained by combining red laser and red fluorescent light; the third primary color light (color coordinate G) of the projection system is formed by mixing the third primary color supplement light (color coordinate G1) and the separated third primary color light (color coordinate G2), namely, the third primary color light is obtained by mixing green laser and green fluorescent light; the first primary color light (color coordinate B) of the projection system is formed by mixing the first primary color light (color coordinate B1) emitted from the excitation light source and the third primary color supplement light (color coordinate G1), namely, by combining the blue laser and the green laser. The three primary color coordinates of the existing two-piece projection system are respectively R2, G2 and B1, and compared with the existing two-piece projection system, the present embodiment increases the second primary color supplement light and the third primary color supplement light, so that the three primary color standards of the projection system are respectively R, G, B, and the color gamut range is expanded.
Referring to fig. 5, fig. 5 is a schematic diagram of the on/off timing of the excitation light source and the supplemental light source provided in the present embodiment. The excitation light source 120 is always in an on state, the supplement light source 130 is turned on to emit third primary color supplement light (green laser) with a smaller intensity when the non-conversion region B is located on the light path of the first primary color excitation light, and is turned on to emit second primary color supplement light (red laser) and third primary color supplement light when the conversion region Y is located on the light path of the first primary color excitation light. In this embodiment, when the non-conversion region B is located on the light path of the first primary color excitation light, the supplemental light source 130 is turned on to emit the third primary color supplemental light with a smaller intensity, so as to compensate the first primary color light emitted from the non-conversion region B, thereby expanding the color gamut range of the projection system.
Wherein the three primary colors refer to red, green and blue, the first primary color refers to blue, the second primary color refers to red, and the third primary color refers to green. However, it is understood that in other embodiments, the first primary color may refer to green, the second primary color may refer to blue, and the reference of each primary color may vary according to specific implementation and is not limited to the above-mentioned reference.
In this embodiment, the light splitting element 20 includes a red-blue-green-reflecting film layer for transmitting the first primary light, the second primary light, and the second primary light and reflecting the third primary light and the third primary light. The first primary color light, the second primary color supplement light and the second primary color light are transmitted to the first spatial light modulator 60 along the first light path through the light splitting element 20. The third primary color supplement light and the third primary color light are reflected by the light splitting element 20 and transmitted to the second spatial light modulator 70 along the second light path.
Referring to fig. 6, fig. 6 is a timing diagram of image modulation of the projection system of the present embodiment. When the non-conversion region B is located on the optical path of the first primary color excitation light, the first spatial light modulator receives an image signal including a first primary color light (blue) signal and modulates the first primary color light, and the second spatial light modulator receives an image signal including a first primary color light signal and modulates the third primary color complementary light (green), thereby imaging a first primary color image. When the conversion region Y is located on the optical path of the first primary color excitation light, the first spatial light modulator receives an image signal including a second primary color light (red) signal and modulates the second primary color light to image a second primary color image, and the second spatial light modulator receives an image signal including a third primary color light (green) signal and modulates the third primary color light to image a third primary color image.
The light source device 10 provided in this embodiment is configured to provide the supplemental light source 130 for generating the second primary color supplemental light and the third primary color supplemental light, so as to supplement the second primary color light and the third primary color light formed by the separation of the mixed-color excited light, thereby improving the brightness and the color purity of the second primary color light and the third primary color light. In addition, since the first primary color light emitted from the light source device 10 is formed by combining the first primary color light emitted from the excitation light source 120 and the third primary color supplemental light emitted from the supplemental light source 130, the color gamut of the first primary color light is increased.
Referring to fig. 7, fig. 7 is a timing diagram of image modulation in a projection system according to a second embodiment of the invention. The projection system of the second embodiment is substantially the same as the projection system 100 of the first embodiment, that is, the description of the projection system 100 of the first embodiment is substantially applied to the projection system of the second embodiment, and the main differences are as follows: the structures of the light splitting elements are different, and the image modulation timing of the spatial light modulator is different.
Specifically, the light splitting element includes a film layer which is transmissive to blue, green and red, and is used for transmitting the first primary color light, the third primary color supplementary light and the third primary color light, and reflecting the second primary color supplementary light and the second primary color light. The first primary color light, the third primary color supplement light and the third primary color light are transmitted to the first spatial light modulator along the first light path through the light splitting element. The second primary color supplement light and the second primary color light are reflected by the light splitting element and transmitted to the second spatial light modulator along the second light path. When the non-conversion region B is located on the optical path of the first primary color excitation light, the first spatial light modulator receives an image signal including a first primary color light (blue) signal and modulates the first primary color light and a third primary color supplement light (green), thereby imaging a first primary color image. When the conversion region Y is located on the optical path of the first primary color excitation light, the first spatial light modulator receives an image signal including a second primary color light (red) signal and modulates the second primary color light to image a second primary color image, and the second spatial light modulator receives an image signal including a third primary color light (green) signal and modulates the third primary color light to image a third primary color image.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a light source device 30 of a third embodiment of a projection system according to the invention. The projection system of the third embodiment is substantially the same as the projection system 100 of the first embodiment, that is, the description of the projection system 100 of the first embodiment is substantially applied to the projection system of the third embodiment, and the main differences are as follows: the scattering element 353, the supplemental light source 330, the third light combining element 352, and the first reflecting element 357 are disposed at different positions.
Specifically, the scattering element 353 is disposed on the color wheel 360, and is configured to perform coherent elimination processing on the first primary color light, the second primary color supplementary light, and the third primary color supplementary light, so as to eliminate a speckle phenomenon. Referring to fig. 9, fig. 9 is a schematic structural diagram of a color wheel of the light source device shown in fig. 8. The scattering elements 353 are integrally formed with each other around the inner circumference of the color wheel 360. In this embodiment, the scattering element 353 has a substantially annular shape. It is understood that, in modified embodiments, the scattering elements 353 may also be integrally formed with each other around the outer circumference of the color wheel 360.
The third light combining element 352 and the first reflecting element 357 perform intermodulation, that is, the third light combining element 352 is disposed at the position of the first reflecting element 157 in fig. 2, and the first reflecting element 357 is disposed at the position of the third light combining element 152 in fig. 2, so that the first primary color light emitted from the color wheel sequentially passes through the second collecting lens group and the first reflecting element 157, enters the third light combining element 352, and is combined into a single path at the third light combining element 352 and enters the scattering element 353.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a light source device 40 of a fourth embodiment of a projection system according to the invention. The projection system of the fourth embodiment is substantially the same as the projection system of the third embodiment, that is, the description of the projection system of the third embodiment is substantially applicable to the projection system of the fourth embodiment, and the main difference therebetween is that: the supplemental light source and the excitation light source are integrated in the same laser array 450, the first light combining element 470 and the second light combining element 442 have different structures, the second light guiding assembly further includes a second reflecting element 458 for reflecting only the first primary light, and the third light combining element is omitted.
Specifically, the second reflecting element 458 is disposed at a position of the third light combining element instead of the third light combining element. The first primary color light emitted from the color wheel sequentially passes through the collection lens group, the first reflective element and the second reflective element 458 and then enters the filter element.
Referring to fig. 11, fig. 11 is a schematic diagram of a laser array according to the present embodiment. Specifically, the laser chip 451 used for emitting the first primary color excitation light in the excitation light source, the laser chip 452 used for emitting the second primary color supplement light in the supplement light source, and the laser chip 453 used for emitting the third primary color supplement light in the supplement light source are packaged in the same package structure 455 after being arranged in an array, so as to form the laser array 450. The laser array 450 is used to emit laser light containing three primary colors.
The second light combining element 442 is configured to transmit the three primary color laser light and reflect the mixed color excited light. Referring to fig. 12, fig. 12 is a schematic structural diagram of a second light combining element according to the present embodiment. Specifically, the second light combining element 442 includes a transmissive region 445 and a reflective region 446, where the transmissive region 445 is used for transmitting the tricolor light, and the reflective region 446 is used for reflecting the mixed color excited light. In this embodiment, the transmission region 445 is approximately located in the central region, and the transmission region 445 is provided with an Anti-Reflection (AR) film layer in a full band for transmitting the three primary colors laser; the reflective region 446 is provided with a yellow reflecting film layer for reflecting the mixed color laser beam. The second primary color supplement light and the third primary color supplement light are reflected by the color wheel when being irradiated to the conversion area Y, and the fluorescent material in the conversion area Y scatters the second primary color supplement light and the third primary color supplement light, so that the coherence of the second primary color supplement light and the third primary color supplement light is eliminated. After reflection, the second primary color supplement light and the third primary color supplement light distributed in the lambertian form enter the dodging device through the same optical path as the mixed-color excited light. It is understood that, in an alternative embodiment, the transmission region 445 may further be provided with a polarizer for transmitting the laser light with the first polarization state and reflecting the laser light with the second polarization state, for example, transmitting the red, green and blue laser lights with the same polarization state (P state) and reflecting the laser light with S polarization state; or the transmissive region 445 may also be provided as a through hole.
The first light combining element 470 is configured to transmit the mixed color excited light, the second primary color supplementary light, and the third primary color supplementary light, and reflect the first primary color light. The mixed-color light receiving laser, the second primary color supplement light and the third primary color supplement light are combined with the first primary color light guided by the second light guide assembly after passing through the first light combining element 470.
Referring to fig. 13, fig. 13 is a schematic structural diagram of a light source device 50 of a fifth embodiment of a projection system according to the invention. The projection system of the fifth embodiment is substantially the same as the projection system of the fourth embodiment, that is, the description of the projection system of the fourth embodiment is substantially applicable to the projection system of the fifth embodiment, and the main differences are as follows: the color wheel 560 has a different structure, and the second light guiding assembly and the first light combining element are omitted.
Specifically, the color wheel 560 is a reflective color wheel, that is, the incident light and the emergent light of the color wheel 560 are located on the same side. The non-conversion region B of the color wheel 560 is provided with a mirror or a small angle scattering sheet, such as a gaussian reflector, for reflecting the first primary color light emitted from the laser array. The first primary color light emitted by the laser array is scattered by the non-conversion region B of the color wheel 560 and converted into light distributed in a lambertian form by the conversion region Y of the color wheel 560 to be emitted by the color wheel 560, and the second primary color supplementary light and the third primary color supplementary light emitted by the laser array are scattered by the conversion region Y into light distributed in a lambertian form to be emitted by the color wheel. Therefore, the incident light and the emergent light of the color wheel 560 have different etendue, and the incident light and the emergent light are split at the second light combining element 542 by means of etendue splitting, so that the emergent light is directly converged at the inlet end of the dodging device through the first condenser lens 546.
In the light source device 50 of this embodiment, the mixed color received laser light emitted from the color wheel 560 shares the optical guiding element with the first primary color light, the second primary color supplementary light, and the third primary color supplementary light, so that the volume and the cost of the light source device are reduced.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (17)
1. A light source device, comprising:
the excitation light source is used for emitting first primary color excitation light;
the color wheel comprises a conversion area and a non-conversion area, wherein the conversion area is used for receiving the first primary color exciting light and generating mixed color excited light, and the non-conversion area is used for receiving the first primary color exciting light and emitting unconverted first primary color light;
a supplementary light source for emitting second primary color supplementary light and third primary color supplementary light;
the light guide assembly is used for guiding the second primary color supplement light, the third primary color supplement light and the first primary color light emitted by the color wheel to be emitted from the same emitting channel as the mixed color excited light;
the excitation light source is always in an on state, the supplement light source starts third primary color supplement light with smaller intensity when the non-conversion area is located on the light path of the first primary color excitation light, the supplement light source starts to emit second primary color supplement light and third primary color supplement light when the conversion area is located on the light path of the first primary color excitation light, the first primary color is blue, the second primary color is red, the third primary color is green, and the mixed-color excited light is yellow excited light.
2. The light source apparatus of claim 1 wherein the light directing assembly comprises a first light combining element, the second primary color supplemental light and the third primary color supplemental light and the mixed color excited light emitted by the color wheel and the first primary color light are combined at the first light combining element.
3. The light source device according to claim 2, wherein the first light combining element includes a reflective region and a transmissive region, the transmissive region is configured to transmit the mixed color excited light, and the reflective region is configured to reflect the second primary color supplementary light, the third primary color supplementary light, and the first primary color light emitted from the color wheel; or, the transmission region is configured to transmit the second primary color supplemental light, the third primary color supplemental light, and the mixed-color excited light, and the reflection region is configured to reflect the first primary color light emitted from the color wheel.
4. The light source device according to claim 3, wherein the reflection area is provided with a reflection coating film, and light is converged on the reflection coating film and then reflected.
5. The light source device according to claim 2, wherein the light guide assembly further includes a second light combining element configured to transmit the first primary color light and reflect the mixed color received laser light to the first light combining element.
6. The light source device according to claim 5, wherein the excitation light source and the complementary light source are integrated in the same laser array, and the second light combining element includes a transmission region for transmitting light emitted from the excitation light source and the complementary light source.
7. A light source device according to claim 3, wherein the transmission region is provided with a full-band antireflection film layer or a polarizing plate, or is provided with a through hole.
8. The light source device of claim 2, wherein the light directing assembly further comprises a reflective element that reflects the first primary color light emitted by the color wheel to the first light combining element.
9. The light source device according to claim 8, wherein the supplemental light source and the excitation light source are located on different sides of the color wheel, and the light guide assembly further comprises a third light combining element for transmitting the second primary color supplemental light and the third primary color supplemental light and reflecting the first primary color light.
10. The light source device of claim 9, wherein the light directing assembly further comprises a scattering element for eliminating coherence of the first primary color light, the second primary color supplemental light, and the third primary color supplemental light.
11. The light source device according to claim 10, wherein the scattering elements are integrally formed with each other around an inner or outer circumference of the color wheel.
12. The light source device according to claim 8, wherein the light guide member further includes a condensing lens for condensing the first primary color light emitted from the reflecting element on the first light combining element.
13. The light source device according to claim 1, wherein the color wheel is a reflective color wheel or a semi-reflective and semi-transmissive color wheel.
14. A projection system, comprising:
the light source device of any one of claims 1-13;
a light splitting element configured to split the first primary color light, the mixed-color light-receiving light, the second primary color complementary light, and the third primary color complementary light emitted from the light source device into light transmitted along a first optical path and light transmitted along a second optical path, wherein the mixed-color light-receiving light is separated into the second primary color light and the third primary color light;
a first spatial light modulator for modulating light transmitted along a first optical path; and
and a second spatial light modulator for modulating the light transmitted along the second optical path.
15. The projection system of claim 14, wherein the beam splitting element includes a red-blue-green-transmissive film layer for transmitting the first primary light, the second primary supplemental light, and the second primary light and reflecting the third primary supplemental light and the third primary light, wherein the first spatial light modulator receives and modulates the image signal including the first primary light signal and the second spatial light modulator receives and modulates the image signal including the first primary light signal and the third primary supplemental light when the non-conversion region is located on the optical path of the first primary excitation light.
16. The projection system of claim 14, wherein the light splitting element includes a blue-green-and-red-reflective film layer for transmitting the first primary light, the third primary supplemental light, and the third primary light and reflecting the second primary supplemental light and the second primary light, and wherein the first spatial light modulator receives an image signal comprising a first primary light signal and modulates the first primary supplemental light and the third primary supplemental light when the non-conversion region is in the optical path of the first primary excitation light.
17. The projection system of claim 15 or 16, wherein the first spatial light modulator receives an image signal comprising a second primary light signal and modulates the second primary supplemental light with the second primary light, and the second spatial light modulator receives an image signal comprising a third primary light signal and modulates the third primary supplemental light with the third primary light, when the conversion region is in the optical path of the first primary excitation light.
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| CN110161787B (en) * | 2018-02-14 | 2021-08-27 | 中强光电股份有限公司 | Projection device |
| JP7341740B2 (en) * | 2019-06-12 | 2023-09-11 | キヤノン株式会社 | Light source device and image projection device |
| CN112213909B (en) * | 2019-07-12 | 2023-05-26 | 深圳光峰科技股份有限公司 | Light source system and display device |
| CN112799272B (en) * | 2019-11-13 | 2023-09-15 | 深圳光峰科技股份有限公司 | Display apparatus and control method thereof |
| CN113960864A (en) * | 2020-07-21 | 2022-01-21 | 深圳光峰科技股份有限公司 | Projection system |
| CN114326274A (en) * | 2020-09-27 | 2022-04-12 | 成都极米科技股份有限公司 | Light combination light source device and projection system |
| JP2022107983A (en) * | 2021-01-12 | 2022-07-25 | 株式会社ライトショー・テクノロジー | Projection type display device |
| CN114280882A (en) * | 2021-12-30 | 2022-04-05 | 歌尔光学科技有限公司 | Illumination system and projection light machine |
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| JP4711156B2 (en) * | 2009-06-30 | 2011-06-29 | カシオ計算機株式会社 | Light source device and projector |
| US8888290B2 (en) * | 2011-04-08 | 2014-11-18 | Hong Kong Applied Science and Technology Research Institute Company Limited | Polarization beam splitters for image projection apparatus |
| CN203786412U (en) * | 2014-01-22 | 2014-08-20 | 深圳市亿思达显示科技有限公司 | Light source system used for eliminating laser speckle |
| TWI504832B (en) * | 2014-05-02 | 2015-10-21 | Coretronic Corp | Illumination system and projection apparatus |
| KR20160019177A (en) * | 2014-08-11 | 2016-02-19 | 엘지전자 주식회사 | Projector with phosphor wheel and color wheel in one module |
| CN205992115U (en) * | 2016-08-09 | 2017-03-01 | 深圳市绎立锐光科技开发有限公司 | Light-source system and projector equipment |
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