Light source system and projection device

Abstract

A light source system and a projection device are provided. In the light source system, when the light source (01) and the lens group (03) are off-axis, that is, when the light generated by the light source (01) is incident on the lens group (03) via the light guide element (02) or directly avoiding the light guide element (02), a certain distance is maintained between the optical axis of the light spot and the optical axis of the lens group. By causing the light spot to be excited in the wavelength conversion region after being focused by the lens group, the loss of the first color light and the excited second color light in the light guide element (02) can be reduced. When the excited second color light finally incidents on the light homogenizing element (12), the light spot formed is elliptical, corresponding to the long and short sides of the light homogenizing element (12), respectively, the utilization rate of light can be improved, and the brightness of the projection device can be improved.

Description

Technical Field

[0001] This application relates to the field of projection display technology, and particularly to a light source system and a projection device.

Background Art

[0002] In projection display products, the light source system is a very important component, and its function is to convert light rays of different colors, different angular distributions, different brightnesses and different shapes into uniform spots that irradiate the effective area of the display chip.

[0003] In the field of projection display, traditional bulbs are increasingly not adopted due to their own defects. New light sources such as LEDs, phosphors and lasers show excellent characteristics in terms of brightness, color, lifespan, energy consumption, etc., and are becoming the mainstream of light sources for projection displays. Lasers have the advantages of high brightness and high efficiency as light sources. However, in the conventional system, the spectroscopic element needs to be plated with a film layer that transmits blue light and reflects fluorescence, and the thickness of the spectroscopic sheet is generally 0.5 - 1.1 mm, which has an absorption effect on blue light. Finally, by coating and absorbing the film, the brightness of the blue laser is lost by 2% - 5%, the brightness of the light source of the projection optical device is lost, and the light utilization rate is reduced. At the same time, the focused spot of the blue laser in the conventional system is generally circular, and the spatial light modulator in the projection system is generally rectangular, for example, with an aspect ratio of 16:9. Based on the matching of the optical expansion amount, the laser focused spot is elliptical, which greatly improves the system efficiency.

Summary of the Invention

[0004] This application provides a light source system that can be used in a projection device, can improve the light utilization rate, and thereby improve the brightness of the projection device.

[0005] In a first embodiment, the present application provides a light source system comprising a light source, a first lens group, a wavelength conversion element, an optical guide assembly, and an optical uniformizing element, wherein the optical guide assembly includes an optical guide element, and the wavelength conversion element includes a wavelength conversion region and a reflection region.

[0006] The first colored light generated by the light source is incident on the first lens group via the light guide element, or the first colored light generated by the light source is incident on the first lens group. When the first color light is focused by the first lens group and incident on the wavelength conversion region, the wavelength conversion region is excited by the first color light and emits a second color light, which is incident on the first lens group and incident on the optical guide assembly via the first lens group. When the first colored light is focused by the first lens group and incident on the reflection region, the first colored light is reflected by the reflection region and incident on the optical guide assembly via the first lens group. The first or second colored light incident on the optical guide assembly is incident on the optical homogenizing element via the optical guide assembly, homogenized by the optical homogenizing element, and then emitted. The spot of second color light emitted from the first lens group is elliptical, and the distance between the optical axis of the first color light incident on the first lens group from the light source and the optical axis of the first lens group is the first distance.

[0007] In some embodiments, a beam reduction lens group is further provided between the light source and the light guide element, and the first color light generated by the light source is reduced by the beam reduction lens group before being incident on the light guide element.

[0008] In some embodiments, a diffusion element is further provided between the light source and the light guide element, and the first color light generated by the light source is diffused and homogenized by the diffusion element before being incident on the light guide element, and the diffusion angle of the diffusion element is a first angle.

[0009] In some embodiments, an aperture is provided on the side of the light guide element facing the light source, and the first colored light generated by the light source is incident on the light guide element through the aperture.

[0010] In some embodiments, the first lens group includes at least one aspherical mirror and at least one spherical mirror, wherein the radius of curvature range of one face of the aspherical mirror is within a first preset radius range and the surface coefficient range is within a first preset coefficient range, the radius of curvature of the other face is within a first preset radius range and the surface coefficient range is within a second coefficient range, and the radius of curvature range of one face of the spherical mirror is within a second preset radius range and the radius of curvature of the other face is within a third preset radius range.

[0011] In some embodiments, the light guide element includes a target light transmission region, and first color light generated by a light source is transmitted from the target light transmission region to a first lens group, and the length of the target side of the target light transmission region is determined based on the length of the long side of the light guide element, a first distance, and the length of the major axis of the spot of the first color light.

[0012] In some embodiments, the distance between the lens closest to the wavelength conversion element in the first lens group and the wavelength conversion element is the second distance. And / or, the angle between the light guide element and the wavelength conversion element is the second angle. and / or, the angle between the central ray of the first color light incident on the wavelength conversion element from the first lens group and the normal to the wavelength conversion element is greater than or equal to a predetermined angle. And / or, the light guide element includes a target light transmission region, which is one of the following: a through hole, a diffusion region, an anti-reflective region, a polarization spectroscopy region, or a dichroic region.

[0013] In some embodiments, the optical guide assembly includes an adjustable element and a spectrophotometric / photocombiner element. The spots of the first and second colors of light are incident symmetrically on the light homogenizing element, and the major and minor axes of the second and / or first color light spots correspond to the major and minor sides of the light incident surface of the light homogenizing element, and / or the distance between the adjustable element and the light guide element or spectrophotometric / combiner element is a third distance.

[0014] In some embodiments, the light source system further includes a color filter element, where first or second colored light incident on the optical guide assembly is incident on the color filter element via the optical guide assembly, filtered by the color filter element, and then incident on the optical uniformizing element, among which, The optical guide assembly includes an adjustable element, a second lens group, a spectrophotometric / photosynthetic element, and a third lens group. The optical guide element reflects first and second colored light, the spectrophotometric / photosynthetic element transmits first colored light and reflects second colored light, the second colored light is incident on the optical guide element via the first lens group, reflected by the optical guide element, then transmitted through the second lens group to the spectrophotometric / photosynthetic element, reflected by the spectrophotometric / photosynthetic element to the third lens group, and incident on the color filter element via the third lens group. The first colored light reflected in the reflection region is incident on the optical guide element, reflected by the optical guide element, then transmitted through the second lens group and the spectrophotometric / photosynthetic element to the adjustable element, reflected by the adjustable element, then transmitted through the spectrophotometric / photosynthetic element to the third lens group, and incident on the color filter element via the third lens group. Alternatively, the optical guide assembly includes an adjustable element, a second lens group, a spectrophotometric / photocombiner element, and a third lens group, wherein the optical guide element reflects first and second colored light, the adjustable element transmits the second colored light and reflects the first colored light, the first colored light reflected in the reflection region is incident on the optical guide element, reflected by the optical guide element, then transmitted through the second lens group and incident on the adjustable element, reflected by the adjustable element to the third lens group, and incident on the color filter element via the third lens group, and the second colored light is incident on the optical guide element via the first lens group, reflected by the optical guide element, then transmitted through the second lens group and the adjustable element and incident on the spectrophotometric / photocombiner element, reflected by the spectrophotometric / photocombiner element to the third lens group, and incident on the color filter element via the third lens group, or Alternatively, the optical guide assembly includes an adjustable element and a third lens group, wherein the optical guide element transmits a first color light and reflects a second color light, the first color light reflected in the reflection region is incident on the optical guide element, passes through the optical guide element and is incident on the adjustable element, is reflected by the adjustable element and returns to the optical guide element, passes through the optical guide element and the third lens group and is incident on the color filter element, the second color light is incident on the optical guide element via the first lens group, is reflected by the optical guide element, and then passes through the third lens group and is incident on the color filter element, Alternatively, the optical guide assembly includes an adjustable element, a second lens group, a spectrophotometric / photosynthetic element, and a third lens group, wherein the optical guide element transmits a first color light and reflects a second color light, the first color light reflected in the reflection region is incident on the optical guide element, passes through the optical guide element and is incident on the adjustable element, is reflected by the adjustable element and returns to the optical guide element, passes through the optical guide element and the second lens group and is incident on the spectrophotometric / photosynthetic element, and is incident on the color filter element via the spectrophotometric / photosynthetic element and the third lens group, or, the second color light is incident on the optical guide element via the first lens group, is reflected by the optical guide element, passes through the second lens group and is incident on the spectrophotometric / photosynthetic element, and is incident on the color filter element via the spectrophotometric / photosynthetic element and the third lens group, Alternatively, the optical guide assembly includes an adjustable element, a second lens group, a spectrophotometric / photocombiner element, and a third lens group, wherein the adjustable element reflects a first color of light and transmits a second color of light, the optical guide element reflects the second color of light, the first color of light reflected in the reflection region is incident on the adjustable element, reflected by the adjustable element to the second lens group, incident on the spectrophotometric / photocombiner element via the second lens group, incident on the color filter element via the spectrophotometric / photocombiner element and the third lens group, and the second color of light is incident on the adjustable element via the first lens group, transmitted through the adjustable element to the optical guide element, reflected by the optical guide element, incident on the second lens group, transmitted through the second lens group to the spectrophotometric / photocombiner element, and incident on the color filter element via the spectrophotometric / photocombiner element and the third lens group. Alternatively, the optical guide assembly includes an adjustable element and a third lens group, wherein the adjustable element reflects a first color light and transmits a second color light, the light guide element reflects the second color light, the first color light reflected in the reflection region is incident on the adjustable element, reflected by the adjustable element to the third lens group, and incident on the color filter element via the third lens group, and the second color light is incident on the adjustable element via the first lens group, passes through the adjustable element and is incident on the light guide element, is reflected by the light guide element, is incident on the third lens group, and incident on the color filter element via the third lens group, or Alternatively, the optical guide assembly includes a third lens group, the optical guide element reflects a first color light and a second color light, the first color light reflected in the reflection region is incident on the optical guide element, reflected by the optical guide element, then passes through the third lens group and is incident on the color filter element, and the second color light is incident on the optical guide element via the first lens group, reflected by the optical guide element, then passes through the third lens group and is incident on the color filter element.

[0015] In some embodiments, the light source system further includes a supplemental light source assembly. The light source system includes a spectrophotometric and photocombinator, which reflects a first color light and a second color light and transmits supplemental light generated by a supplemental light source. Alternatively, the beam splitter / combiner element reflects the second color light and transmits the supplementary light generated by the first color light and the supplementary light source, The adjustable element reflects the first color light and transmits the supplementary light generated by the supplementary light source.

[0016] In some embodiments, the beam splitter / combiner element includes a supplementary light transmission region that transmits the supplementary light generated by the supplementary light source, where the supplementary light transmission region is any one of a through hole, a diffusion region, an anti-reflection region, a polarization beam splitting region, and a dichroic region.

[0017] In some embodiments, the supplementary light source assembly includes a first supplementary light source and a second supplementary light source, and the supplementary light includes the light generated by the first color light source and the light generated by the second color light source, The supplementary light transmission region includes a first light transmission region and a second light transmission region. The first light transmission region transmits the light generated by the first supplementary light source, and the second light transmission region transmits the light generated by the second supplementary light source.

[0018] In some embodiments, the supplementary light source assembly includes a polarization combining element. The supplementary light source assembly includes a first supplementary light source and a second supplementary light source. The first supplementary light source and the second supplementary light source generate light having different polarization states, The light having different polarization states generated by the first supplementary light source and the second supplementary light source is combined by the polarization combining element and then incident on the supplementary light transmission region.

[0019] In some embodiments, the supplementary light transmission region reflects the light in the first polarization state and transmits the light in the second polarization state. The supplementary light includes target light that can excite the wavelength conversion region to generate the second color light. The target light is the light in the first polarization state, The light source system further includes a color filter element. The color filter element includes a region that can reflect the target light. A phase conversion element is provided between the color filter element and the beam splitter / combiner element, When the first color light is focused by the first lens group and incident on the wavelength conversion region, the target light is incident on the color filter element through the supplementary light transmission region and the phase conversion element, reflected by the color filter element, then converted by the phase conversion element into light in a second polarization state, reflected by the supplementary light transmission region, incident on the supplementary light transmission region, and finally incident on the wavelength conversion region.

[0020] In some embodiments, the light source system further includes a supplementary light source assembly, and the wavelength conversion element includes a transmission region. The supplementary light generated by the supplementary light source assembly is incident on the first lens group through the transmission region of the wavelength conversion element, incident on the light guide assembly through the first lens group, incident on the light homogenizing element through the light guide assembly, and emitted after being homogenized by the light homogenizing element.

[0021] In some embodiments, the light source system further includes a supplementary light source assembly, and the supplementary light generated by the supplementary light source assembly is incident on the light guide assembly through a light guiding element, incident on the light homogenizing element through the light guide assembly, and emitted after being homogenized by the light homogenizing element.

[0022] In a second aspect, the present application provides a projection device including the light source system described in any one of the first aspect and the possible embodiments of the first aspect.

[0023] In the light source system according to the present invention, when the first color light generated by the light source is incident on the lens group either via a light guide element or directly on the lens group while avoiding the light guide element, a certain distance is maintained between the optical axis of the spot and the optical axis of the lens group. By focusing the light on the lens group to become excitation light in the wavelength conversion region, the loss of the first color light and the excited second color light in the light guide element can be reduced. The spot formed when the excited second color light finally enters the optical uniformizing element is elliptical, and the utilization rate of light can be improved by corresponding to the long and short sides of the optical uniformizing element, respectively. Furthermore, by installing a diffusion element before the light source enters the wavelength conversion region, the light energy density in the wavelength conversion region can be reduced, improving the excitation efficiency of the wavelength conversion material. The light guide element may be a through hole, and the loss of the first color light during transmission can be reduced by the first color light entering the lens group through the through hole. At the same time, by installing a beam reduction lens group before the light source enters the light guide element, the area of ​​the through-hole can be reduced, the overlap area between the through-hole and the spot of the second color light can be reduced, and the loss of the second color light can be reduced. As a result, the light source system of this embodiment can improve the light utilization rate and improve the brightness of the projection device. [Brief explanation of the drawing]

[0024] By describing embodiments of the present application in more detail with reference to the drawings, the above and other purposes, features, and advantages of the present application will become clearer. The drawings are provided for further understanding of embodiments of the present application, constitute part of the specification, and are intended to be used in conjunction with embodiments of the present application, and do not limit the present application. In the drawings, the same reference numerals usually represent the same part or step. Here. [Figure 1] This is a schematic diagram of the structure of a light source system in one embodiment of the present invention. [Figure 2] A schematic diagram of the structure of a light guide element in one embodiment of the present invention. [Figure 3] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 4] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 5] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 6] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 7] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 8] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 9] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 10] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 11] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 12] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 13] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 14] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 15] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 16] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 17] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 18] This is a schematic diagram of the structure of a light source system in another embodiment of the present invention. [Figure 19] This is a schematic diagram of the structure of a projection equipment in one embodiment of the present invention. [Modes for carrying out the invention]

[0025] To enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments. It is clear that the embodiments described are only a selection of the embodiments of the present application, not all of them. The specific embodiments described herein are for illustrative purposes only and do not limit the present application. It should be understood that the specific embodiments described herein are merely for illustrative purposes and do not limit the present application. All other embodiments derived from the embodiments of the present application without creative work by those skilled in the art should fall within the scope of protection of the present application. Furthermore, although the content disclosed herein is presented according to one or more exemplary embodiments, it should be understood that each aspect of these disclosed content can also constitute a complete technical solution on its own. The embodiments and features of the embodiments described below can be combined with each other, insofar as they do not contradict each other.

[0026] In the embodiments of this Application, terms such as “exemplary” and “for example” are used to indicate an example, illustration, or explanation. Any embodiment or design described as “example” in this Application should not be construed as being preferable or advantageous to other embodiments or designs. More precisely, the terms “example” are intended to concretely illustrate the concept.

[0027] Unless otherwise defined, technical or scientific terms used in this Application have the same meaning as those commonly understood by a person of ordinary skill in the art to which this Application belongs. The terms “First,” “Second,” and similar terms used in this Application do not indicate any order, quantity, or importance, but are used solely to distinguish descriptions. Similar terms such as “Includes” or “Has” mean that the element or object appearing before the term covers the element or object and its equivalents appearing after the term, and does not exclude other elements or objects. The term “and / or” includes any and all combinations of one or more related enumerated items.

[0028] To better understand the present application, a detailed explanation of the technical concept is provided below. Preferred embodiments of the present application are described in detail below, but in addition to these detailed explanations, the present application may have other embodiments.

[0029] This embodiment provides a light source system, as shown in Figure 1, which includes a light source 01, a first lens group 03, a wavelength conversion element 04, an optical guide assembly, and an optical uniformizing element 12, wherein the optical guide assembly includes an optical guide element 02, and the wavelength conversion element 04 includes a wavelength conversion region and a reflection region.

[0030] The first color light generated by the light source 01 is incident on the first lens group 03 via the light guide element 02, or the first color light generated by the light source 01 is incident on the first lens group 03 and when the first color light is focused by the first lens group 03 and incident on the wavelength conversion region, the wavelength conversion region is excited by the first color light and emits second color light, the second color light is incident on the first lens group 03 and incident on the optical guide assembly via the first lens group 03, and when the first color light is focused by the first lens group 03 and incident on the reflection region, the reflection region reflects the first color light and incident on the optical guide assembly via the first lens group 03.

[0031] First or second colored light incident on the optical guide assembly is incident on the optical uniformizing element 12 via the optical guide assembly, uniformized by the optical uniformizing element 12, and emitted. Selectively, the light source system further includes a color filter element 11, in which first or second colored light incident on the optical guide assembly is incident on the color filter element 11 via the optical guide assembly, filtered by the color filter element 11, and incident on the optical uniformizing element 12.

[0032] Here, the spot of second color light emitted from the first lens group is elliptical, and the distance between the optical axis of the first color light emitted from the light source 01 to the first lens group and the optical axis of the first lens group is the first distance.

[0033] If the first lens group selectively includes the first lens and the second lens, the first distance L1 satisfies the following equation.

number

[0034] In the formula, n1 represents the refractive index of the first lens, and r 11 represents the radius of curvature of the first surface of the first lens, and r 12 represents the radius of curvature of the second surface of the first lens, d1 represents the central thickness of the first lens, n2 represents the refractive index of the second lens, and r 21 represents the radius of curvature of the first surface of the second lens, and r 22 d² represents the radius of curvature of the second surface of the second lens, d² represents the central thickness of the second lens, and D represents the distance between the first lens and the second lens. For example, the first distance can take a value within the range of 2 to 12 mm. Selectively, the angle range between the first color light and the normal of the wavelength conversion element is 25 to 75 degrees.

[0035] Light source 01 and the first color light are not limited and may be an LED light source, a laser LD light source, or other novel light sources, or a mixed light source of an LED light source and a laser LD light source. The number of light-emitting chips in light source 01 is not limited and may be a single light-emitting chip or an array of light-emitting chips. For example, light source 01 may be an LD light source that generates blue laser light, and the first color light may be blue laser light, UV light, etc.

[0036] The wavelength conversion region contains a wavelength conversion material, which may be a phosphor or fluorescent powder, or it may be a yellow phosphor that emits yellow light when excited, such as a yttrium aluminum garnet (YAG) phosphor containing cerium (CE) as an activator, or it may be a green fluorescent powder, red fluorescent powder, blue fluorescent powder, etc. The wavelength conversion region may contain at least one sub-region, each sub-region corresponding to one wavelength conversion material, and capable of generating at least one color light whose wavelength range differs from that of the first color light, i.e., the second color light includes at least one color light whose wavelength range differs from that of the first color light, for example, the second color light may be at least one of red light, green light, yellow light, and blue light.

[0037] The reflective region has the property of reflecting all light rays and may be, for example, a mirror, a polished metal layer or metal plate, a substrate plated with a reflective film, particles with diffuse reflection, or a microstructured reflective layer. Selectively, the reflective surface of the reflective region and the wavelength conversion region are substantially coplanar.

[0038] The color filter element may be a filter wheel and may include multiple filter regions that filter a first color light, a second color light, and a supplemental light, respectively. For example, the color filter element may include filter regions that filter blue light, red light, and green light. The color filter element may have one surface plated with a dichroic film and the other surface a diffusion sheet, or it may have a two-layer structure, with one layer being a diffusion sheet and the other layer being a color filter. The filter element 11 and the wavelength conversion element 04 may be driven by one drive device or by different drive devices. The light homogenization element may be a compound eye or an optical rod, etc.

[0039] Selectively, the first lens group 03 includes at least one aspherical mirror and at least one spherical mirror, wherein the radius of curvature range of one face of the aspherical mirror is within a first preset radius range, the surface coefficient range is within a first preset coefficient range, the radius of curvature of the other face is within a first preset radius range, the surface coefficient range is within a second coefficient range, and the radius of curvature range of one face of the spherical mirror is within a second preset radius range. The first preset radius range, the second preset radius range, the third preset radius range, the first preset coefficient range, and the second coefficient range are not limited and can be customized according to the actual application. For example, the radius of curvature of one face of an aspherical mirror may be in the range of 15mm to 30mm, with a surface coefficient of 1 to 2, and the radius of curvature of the other face may be in the range of 0.3 to 1. The radius of curvature of one face of a spherical mirror may be in the range of 10mm to 20mm, with a radius of curvature of 150 or more. Alternatively, for example, the radius of curvature of one face of an aspherical mirror may be in the range of -30mm to 30mm, with a surface coefficient of -20 to 20, and the radius of curvature of the other face may be in the range of -30mm to 30mm, with a surface coefficient of -10 to 10. The radius of curvature of one face of a spherical mirror may be in the range of 10mm to 20mm, with a radius of curvature of 100 or more. As shown in Figure 1, C1 may be a spherical mirror and C2 may be an aspherical mirror, or C2 may be a spherical mirror and C1 may be an aspherical mirror. By appropriately setting the curvature parameters (such as radius of curvature and surface coefficient) of the lens group, the generated second color light spot can be made elliptical, which can be better matched to the shape of the subsequent light uniformizing element, thereby improving the light utilization rate.

[0040] Selectively, the second distance is the distance between the lens closest to the wavelength conversion element 04 in the first lens group 03 and the wavelength conversion element 04. The second distance is not limited and may be customized according to the actual application. For example, the second distance can take a value in the range of 0.5 to 1.5 mm, as shown in Figure 1, that is, the distance between the surface of lens C1 and the surface of the wavelength conversion element 04 facing lens C1 is within 0.5 to 1.5 mm.

[0041] Selectively, the angle between the central ray of the first color light emitted from the first lens group 03 to the wavelength conversion element 04 and the normal to the wavelength conversion element is greater than or equal to a preset angle. The preset angle is not limited and may be determined based on the first distance and the curvature parameter of the first lens group, for example, it may be 51 degrees. Selectively, the angle range between the first color light and the normal to the wavelength conversion element is 25 to 75 degrees. Based on an appropriate angle of incidence to the wavelength conversion element, the first color light reflected by the reflection region is reflected by the first lens group, optical guide assembly, etc., and incident on the optical uniformizing element, and the light utilization rate can be improved by causing the spot to be incident symmetrically when it is incident on the optical uniformizing element.

[0042] In some embodiments, the light guide element 02 includes a target light transmission region, and the first color light generated by the light source 01 is transmitted from the target light transmission region to the first lens group 03.

[0043] Selectively, the overlapping area between the target light transmission region and the spot region formed by the second color light on the light guide element is less than or equal to the area of ​​the target light transmission region with a predetermined ratio. The predetermined ratio is not limited and may be customized according to the actual application situation; for example, the ratio is within 0-10%. The shape of the target light transmission region is not limited and may be rectangular, circular, elliptical, etc.

[0044] Selectively, the length of the target side of the target light transmission region is determined based on the length of the long side of the light guide element, the first distance, and the length of the long axis of the spot of the first color light. The target side may also be a side parallel to the long axis of the second color light or the long side of the light guide element.

[0045] Selectively, the length L of the target side of the target light transmission region satisfies the following equation.

number

[0046] Selectively,

number

[0047] For example, the size of the target light transmission area may be within the range of 11 mm × 15 mm to 9.4 mm × 4.5 mm, meaning the length of the target side is within the range of 9.4 mm to 15 mm.

[0048] Selectively, the target light transmission region may be a through-hole, a diffusion region, an anti-reflective region, a polarization spectroscopic region, or a dichroic region. The diffusion region may be a diffusion sheet, the anti-reflective region may be formed by plating an anti-reflective film on a light transmission substrate, the polarization spectroscopic region may be formed by plating a polarization spectroscopic film on a light transmission substrate (for example, reflecting or transmitting S light and transmitting or reflecting P light) or a polarization spectroscopic sheet, and the dichroic region may be formed by plating a dichroic film on a light transmission substrate. This dichroic film transmits a first color of light and reflects a second color of light. For example, this dichroic film transmits blue light and reflects red-green light, with a reflection wavelength range including at least 500-680 nm and a transmission wavelength range including at least 440-470 nm. As shown in Figure 2(2), E indicates a spot region where the second color of light is formed on the light guide element, and D indicates the target light transmission region. Selectively, the target light transmission region may be located at either end of the light guide element. If the target light transmission region is a through-hole, it is possible to ensure that there is little to no loss when the first color light passes through the light guide element.

[0049] Selectively, the size of the spot of the first color light reflected in the reflection region is greater than or equal to the size of the spot when the first color light passes through the target light transmission region. That is, the size of the spot when the first color light passes through the target light transmission region is made as small as possible, which reduces the size of the target transmission region and thereby further reduces the loss of the second color light in the light guide element.

[0050] Selectively, the first colored light generated by the light source 01 may be incident directly on the first lens group from the side of the light guide element 02, avoiding the light guide element 02, thereby reducing the loss of the first colored light in the light guide element. Selectively, the light guide element 02 may be an element with one end being L-shaped, and the first colored light may be incident on the first lens group from the L-shaped end.

[0051] Selectively, the angle between the light guide element 02 and the wavelength conversion element 04 is the second angle, which may be customized according to the actual application situation. For example, the second angle can take a value within 30 to 45 degrees. For example, if the light guide element is positioned at 45 degrees with respect to the horizontal line, the angle between the light guide element 02 and the wavelength conversion element 04 can be set to within 30 to 45 degrees by setting the inclination angle range of the wavelength conversion element with respect to the horizontal line to between 0 and 15 degrees.

[0052] In some embodiments, as shown in Figure 1, a beam reduction lens group 05 is further provided between the light source 01 and the light guide element 02, and the first color light generated by the light source 01 is beam-reduction by the beam reduction lens group 05 and incident on the light guide element 02. By making the size of the spot incident on the light guide element as small as possible with the beam reduction lens group, the loss of the second color light incident on the light guide element in the target light transmission region can be reduced and the light utilization rate can be improved. Selectively, the beam reduction lens group may include a collimator lens, or the beam reduction lens group may be replaced with a collimator lens, or it may be a beam expansion lens group.

[0053] In some embodiments, as shown in Figure 1, a diffusion element 06 is provided between the light source and the light guide element. The first color light generated by the light source or the beam-reduced first color light is diffused and homogenized by the diffusion element 06 and incident on the light guide element. The diffusion angle of the diffusion element is the first angle, which may be a half-angle or a full-angle, and the first angle may be customized according to the actual application. For example, the full-angle can take a value of 3 to 6 degrees. Selectively, the distance between the diffusion element and the light guide element is smaller than the target distance, and the target distance may be customized according to the actual application. That is, the distance between the diffusion element and the light guide element is as short as possible. The diffused first color light is incident on the wavelength conversion region, and the excitation efficiency of the wavelength conversion region can be improved by reducing the energy density incident on the wavelength conversion region. For example, the energy density can be reduced to 150 W / mm². 2The following may be done: Selectively, the positions of the diffusing element and the reduction lens group may be swapped, i.e., the first color light may first pass through the diffusing element and then through the reduction lens group. Selectively, the beam reduction lens group may also be replaced with a beam expansion lens group, the beam may be expanded by the beam expansion lens group, diffused by the diffusing element, and then incident on the light guide element via the aperture.

[0054] In some embodiments, an aperture is provided on the side of the light guide element 02 facing the light source, and the first color light generated by the light source, or diffused and homogenized first color light, or beam-reduced first color light, is incident on the light guide element through the aperture. The aperture prevents the rays of the first color light from entering regions other than the target light transmission region, thereby reducing the loss of the first color light and effectively improving the utilization rate of light. Furthermore, the rays are incident on the wavelength conversion region through the first group of focusing lenses, resulting in a lower energy density and improved excitation efficiency in the wavelength conversion region.

[0055] Selectively, the second color light emitted through the first lens group forms an elliptical spot, which is determined by factors such as the curvature parameter of the first lens group, the size of the spot of the first color light, the degree of off-axis (the first distance between the optical axis of the first color light and the optical axis of the first lens group), and the diffusion angle of the diffusion element.

[0056] In some embodiments, the optical guide assembly includes an adjustable element 07 and a spectrophotometric / combiner element 09, where the spots of the first and second colored light are incident on the optical homogenizing element symmetrically, and the major and minor axes of the second and / or first colored light spots correspond to the major and minor sides of the light incident surface of the optical homogenizing element, respectively. For example, when incident on the optical homogenizing element, the optical axes of the first and second colored light spots coincide with the central axis of the light incident surface of the optical homogenizing element, i.e., the centers of the spots are equally far from either end of the major axis and equally far from either end of the minor axis of the optical homogenizing element, and the first and second colored light are incident on the optical homogenizing element coaxially or paraxially. For example, if the light uniformizing element is a light rod, the major and minor axes of the spots of the second color light and / or the first color light correspond to the long and short sides of the light rod. Or, if the light uniformizing element is a compound eye, the major and minor axes of the spots of the second color light and / or the first color light correspond to the long and short sides of each small cell of the compound eye. This makes the spot shape elliptical, which is better suited to the shape of the light uniformizing element, and by symmetrically incident on the light uniformizing element, it is better suited to the spatial light modulator in the projection optics engine, thereby increasing the efficiency of light utilization.

[0057] Selectively, the distance between the adjustable element and the light guide element or spectrophotometric / compounding element is a third distance, which may be customized according to the actual application situation; for example, the third distance can take a value in the range of 3 to 10 mm. Selectively, the angle between the adjustable element and / or spectrophotometric / compounding element and the horizontal line may be between 40 and 50 degrees, or the angle between the adjustable element and the optical axis of the first color light emitted from the light guide element may be between 40 and 50 degrees, and the angle and position between the adjustable element and the light guide element or spectrophotometric / compounding element affects whether the first color light and the second color light can be incident on the light homogenizing element coaxially or paraxially.

[0058] In some embodiments, as shown in Figure 1, the optical guide assembly includes an adjustable element, a second lens group 08, a spectrophotometric / photocombiner element 09, and a third lens group 10, and the color filter element 11 and the wavelength conversion element 04 share a single drive unit. The light guide element 02 reflects the first and second colored light, the adjustable element 07 reflects the first colored light, and the adjustable element 07 may be a reflector or a reflective diffuser sheet. The spectrophotometric / photocombiner element 09 transmits the first colored light and reflects the second colored light. For example, the light guide element 02 reflects blue light, red light, and green light, and the light guide element 02 may be a reflector or reflective diffuser sheet having a target light transmission region, the spectrophotometric / photocombiner element 09 reflects red and green light and transmits blue light, with a transmission wavelength range of at least 450 to 470 nm and a reflection wavelength range of at least 510 to 680 nm, and the adjustable element 07 reflects blue light. Selectively, the distance between the adjustable element and the spectrophotometric / photocombiner element is a third distance.

[0059] The second color light is incident on the light guide element 02 via the first lens group 03, reflected by the light guide element 02, then passes through the second lens group 08 and is incident on the spectrophotometric / photocombiner element 09, reflected by the spectrophotometric / photocombiner element 09 and incident on the color filter element 11 via the third lens group 10. The first color light reflected in the reflection region is incident on the light guide element 02, reflected by the light guide element 02, then passes through the second lens group 08 and the spectrophotometric / photocombiner element 09 and is incident on the adjustable element 07, reflected by the adjustable element 07, then passes through the spectrophotometric / photocombiner element 09 and is incident on the third lens group 10 and incident on the color filter element 11 via the third lens group 10.

[0060] In some embodiments, as shown in Figure 3, the optical guide assembly includes a second lens group 08, a spectrophotometric / photocombiner element 09, and a third lens group 10, and the color filter element 11 and the wavelength conversion element 04 share a single drive unit. The light guide element 02 transmits first color light and reflects second color light. For example, the light guide element may transmit blue light and reflect red-green light, with a reflection wavelength range including at least 500-680 nm and a transmission wavelength range including at least 440-470 nm. The number of lenses, radius of curvature, coefficient of curvature, etc. in the second and third lens groups may be customized according to the actual application, and for example, they may both be spherical mirrors. The adjustable element 07 may be a reflector or a reflective diffuser sheet. The spectrophotometric / photocombiner element 09 reflects first color light and second color light.

[0061] The first color light reflected in the reflective region is incident on the light guide element 02, passes through the light guide element 02 and is incident on the adjustable element 07, is reflected back to the light guide element 02 by the adjustable element 07, passes through the light guide element 02 and the second lens group 08 and is incident on the spectrophotometric / photocombiner element 09, and is incident on the color filter element 11 via the spectrophotometric / photocombiner element 09 and the third lens group 10. The second color light is incident on the light guide element 02 via the first lens group 03, is reflected back to the light guide element 02, and is then incident on the spectrophotometric / photocombiner element 09 via the second lens group 08, and is incident on the color filter element 11 via the spectrophotometric / photocombiner element 09 and the third lens group 10.

[0062] Selectively, the light guide element 02 includes regions A, B, C, and a target light transmission region D. Regions A and B transmit first color light and reflect second color light. Region C is a region plated with a reflector or reflective film, which can enhance reflection for second color light and reduce light loss. The target light transmission region D is described above and will not be explained here. For example, as shown in Figure 2(1), first color light can be transmitted from region A to the adjustable element 07, and the first color light reflected from the adjustable element 07 to the light guide element 02 can be transmitted from region B to the second lens group 08.

[0063] Selectively, as shown in Figure 4, the second lens group may be omitted, in which case the third lens group includes at least one aspherical mirror.

[0064] In some embodiments, as shown in Figure 5, the optical guide assembly includes a third lens group 10, and the light guide element 02 transmits first color light and reflects second color light. The color filter element 11 and the wavelength conversion element 04 employ different drive mechanisms. The first color light reflected in the reflection region is incident on the light guide element 02, passes through the light guide element and is incident on the adjustable element 07, is reflected back to the light guide element 02 by the adjustable element 07, passes through the light guide element 02 and the third lens group 10 and is incident on the color filter element 11. The second color light is incident on the light guide element 02 via the first lens group 03, is reflected by the light guide element 02, and then passes through the third lens group 10 and is incident on the color filter element 11. The adjustable element 07 may be a reflector or a reflective diffuser sheet. Selectively, the third lens group 10 includes at least one aspherical mirror.

[0065] In some embodiments, as shown in Figure 6, the optical guide assembly includes a second lens group 08, a spectrophotometric / photocombiner element 09, and a third lens group 10, and the color filter element 11 and the wavelength conversion element 04 share a single drive unit. The light guide element 02 reflects first and second color light, and the adjustable element 07 transmits second color light and reflects first color light. For example, the light guide element 02 reflects blue, red, and green light. The adjustable element transmits red and green light and reflects blue light. The reflection wavelength range is at least 450-470 nm, and the transmission wavelength range is at least 510-680 nm. The light guide element 02 may be a mirror or reflective diffuser sheet having a target light transmission region. Selectively, the distance between the adjustable element and the spectrophotometric / photocombiner element is a third distance.

[0066] The first color light reflected in the reflective region is incident on the light guide element 02, reflected by the light guide element 02, then passes through the second lens group 08 and is incident on the adjustable element 07, reflected by the adjustable element 07 to the third lens group 10, and then incident on the color filter element 11 via the third lens group 10. The second color light is incident on the light guide element 02 via the first lens group 03, reflected by the light guide element 02, then passes through the second lens group 08 and the adjustable element 07 and is incident on the spectrophotometric / photocombiner element 09, reflected by the spectrophotometric / photocombiner element 09 to the third lens group 10, and then incident on the color filter element 11 via the third lens group 10.

[0067] In some embodiments, as shown in Figure 7, the optical guide assembly includes a third lens group 10, and the optical guide element 02 reflects first and second colored light. The first colored light reflected in the reflection region is incident on the optical guide element 02, reflected by the optical guide element 02, and then passes through the third lens group 10 to the color filter element 11. The second colored light is incident on the optical guide element 02 via the first lens group 03, reflected by the optical guide element 02, and then passes through the third lens group 10 to the color filter element 11. In this case, the optical uniformizing element may be a compound eye.

[0068] In some embodiments, as shown in Figure 8, the optical guide assembly includes an adjustable element 07, a second lens group 08, a spectrophotometric / photocombiner element 09, and a third lens group 10. The adjustable element 07 reflects a first color of light and transmits a second color of light, while the optical guide element 02 reflects the second color of light. For example, the adjustable element 07 reflects blue light and transmits red and / or green light. The optical guide element 02 may be a reflector or reflective diffuser sheet that reflects blue light and has a target light transmission region. The color filter element and the wavelength conversion element employ the same drive mechanism. The optical guide element and the adjustable element are arranged in a non-parallel position. For example, if the optical guide element is set at 45 degrees to the horizontal, the adjustable element is set at an angle other than 45 degrees to the horizontal.

[0069] The first color light reflected in the reflection region is incident on the adjustable element 02, reflected by the adjustable element 02 to the second lens group 08, incident on the spectrophotometric / photocombiner element 09 via the second lens group 08, and incident on the color filter element 11 via the spectrophotometric / photocombiner element 09 and the third lens group 10. The second color light is incident on the adjustable element 07 via the first lens group 03, passes through the adjustable element 07 to the light guide element 02, is reflected by the light guide element 02, then incident on the second lens group 08, passes through the second lens group 08 to the spectrophotometric / photocombiner element 09, and incident on the color filter element 11 via the spectrophotometric / photocombiner element 09 and the third lens group 10.

[0070] In some embodiments, as shown in Figure 9, the optical guide assembly includes an adjustable element 07 and a third lens group 10. The adjustable element 07 reflects a first color of light and transmits a second color of light, the light guide element 02 reflects the second color of light, and the color filter element and the wavelength conversion element employ different drive mechanisms. The light guide element 02 and the adjustable element 07 can be described with reference to Figure 8.

[0071] The first color light reflected in the reflection region is incident on the adjustable element 07, reflected by the adjustable element 07 to the third lens group 10, and incident on the color filter element 11 via the third lens group 10. The second color light is incident on the adjustable element 07 via the first lens group 03, passes through the adjustable element 07 to the light guide element 02, is reflected by the light guide element 02, then incident on the third lens group 10, and incident on the color filter element 11 via the third lens group 10.

[0072] Selectively, one or more of the adjustable element 07, the light guide element 02, and the spectrophotometric / photocombiner element 09 may be elements having a constant curvature, and by setting this curvature, the first color light and the second color light incident on the light homogenization element may be made coaxial. In this case, the second lens group and / or third lens group may not be provided. For example, if the adjustable element 07 shown in Figure 3 is a reflector having a constant curvature, the second lens group and / or third lens group may not be provided, and the first color light reflected by the adjustable element 07 and the second color light reflected by the light guide element 02 may be made coaxial and ultimately incident on the light homogenization element.

[0073] In some embodiments, the light source system further includes a supplemental light source assembly 13, and the supplemental light generated by the supplemental light source assembly 13 is incident on an optical guide assembly via a light guide element, incident on an optical uniformizing element via the optical guide assembly, uniformized by the optical uniformizing element and emitted, thereby increasing the color gamut and brightness of the light source system. Selectively, the supplemental light may be incident on the optical guide assembly via a target light transmission region of the light guide element, or the optical guide assembly may have properties that transmit supplemental light.

[0074] Here, the supplemental light source assembly 13 may include at least one supplemental light source, which may be an LED light source or an LD light source, and each light source may be a single light-emitting chip or an array of light-emitting chips. The supplemental light includes supplemental light in at least one wavelength range. The polarization state of the supplemental light is not limited and may be P state or S state, or may be P state or S state. Selectively, the supplemental light source assembly 13 includes an LD light source or an LED light source that generates at least one of red light, green light and blue light, and the supplemental light is at least one of red laser light, green laser light and blue laser light or LED light, green LED light and blue LED light. For example, the supplemental light source assembly 13 includes one LD light source that generates red laser light, and the supplemental light is red laser light. Selectively, the supplemental light source assembly 13 includes a mixed light source of an LED light source and an LD light source. The supplemental light is at least two of red laser light, green laser light and blue laser light, and LED light, green LED light and blue LED light. Selectively, a group of focusing collimating lenses can also be adaptively installed in the supplemental light source assembly 13.

[0075] As shown in Figure 10, the supplement light source assembly 13 includes a supplement light source 131. The supplement light generated by the supplement light source 131 is incident on the third lens group 10 through the target light transmission region of the light guide element 02, incident on the color filter element 11 through the third lens group 10, filtered by the color filter element 11, then incident on the light uniformizing element 12, uniformized by the light uniformizing element 12, and emitted.

[0076] In some embodiments, the wavelength conversion element includes a transmission region, and the supplemental light generated by the supplemental light source assembly 13 is incident on a first lens group through the transmission region of the wavelength conversion element, incident on an optical guide assembly through the first lens group, incident on an optical homogenizing element through the optical guide assembly, and homogenized and emitted by the optical homogenizing element. Here, the transmission region may be any one of a through hole, an optical transmission substrate (e.g., white glass), a diffusion region, or an anti-reflective region. The diffusion region may be a diffusion sheet, and the anti-reflective region may be an optical transmission substrate with anti-reflective plating. Selectively, the supplemental light generated by the supplemental light source assembly 13 may not pass through the wavelength conversion element but be aligned into the optical path of the light source system via a side edge of one end of the wavelength conversion element.

[0077] As shown in Figure 11, the supplement light source assembly 13 includes a supplement light source 131, where the adjustable element 07 transmits the second color light and the supplement light and reflects the first color light, and the light guide element 02 reflects the second color light and the supplement light, for example, the second color light is green light and / or red light, and the supplement light is red laser light and / or green laser light. The supplement light generated by the supplement light source 131 is incident on the first lens group 03 through the transmission region of the wavelength conversion element 04, incident on the light guide element 02 through the first lens group 03 and the adjustable element 07, reflected by the light guide element 02, then incident on the color filter element 11 through the third lens group 10, filtered by the color filter element 11, then incident on the light uniformization element 12, uniformized by the light uniformization element 12, and then emitted.

[0078] In some embodiments, as shown in Figure 12, the supplement light source assembly 13 includes a first supplement light source 131 and a second supplement light source 132. The supplement light generated by the first supplement light source 131 is incident on the first lens group 03 through the transmission region of the wavelength conversion element 04, incident on the light guide element 02 via the first lens group 03 and the adjustable element 07, reflected by the light guide element 02, and then incident on the third lens group 10. The supplement light generated by the second supplement light source 132 is incident on the third lens group 10 after passing through the light guide element 02. The supplement light incident on the third lens group 10 is incident on the color filter element 11 after passing through the third lens group 10, filtered by the color filter element 11, then incident on the light uniformization element 12, uniformized by the light uniformization element 12, and then emitted. For example, the first supplement light source 131 is a red laser light source, and the second supplement light source 132 is a red LED light source. The wavelength ranges of the red laser light and the red LED light may be different, and the light guide element 02 can perform photosynthesis depending on the wavelength, or the light guide element 02 includes a target region, and this target region reflects the red laser light. In this case, the wavelength conversion element may include only the wavelength conversion region that generates green light.

[0079] In some embodiments, the light source system includes a spectrophotometric element that reflects first and second color light and transmits supplemental light generated by a supplemental light source. Alternatively, the spectrophotometric element reflects second color light and transmits first color light and supplemental light generated by a supplemental light source. An adjustable element reflects first color light and transmits supplemental light generated by a supplemental light source. Selectively, the spectrophotometric element may be placed between a color filter element and a light guide element. Supplemental light is incident on the color filter element via the spectrophotometric element and a third lens group, filtered by the color filter element, then incident on a light homogenizing element, homogenized by the light homogenizing element, and then emitted.

[0080] Furthermore, the spectrophotometric element may have dichroic properties. For example, by plating it with a dichroic film, the spectrophotometric element reflects the first color light and the second color light, and transmits the supplemental light generated by the supplemental light source. For example, if the light generated by the excitation of the wavelength conversion region is green light, and the supplemental light generated by the supplemental light source assembly 13 is red laser light, the spectrophotometric element reflects blue light, green light, and / or red light (fluorescence), transmits red laser light, and the reflection wavelength range includes at least 420 to 620 nm, and the transmission wavelength range includes at least 635 to 680 nm.

[0081] Selectively, the spectrophotometric element includes a supplement light transmission region, which transmits supplement light generated by a supplement light source. The supplement light transmission region may be any one of the following: a through hole, a diffusion region, an anti-reflective region, a polarization spectral region, or a dichroic region. The diffusion region may be a diffusion sheet, the anti-reflective region may be a light-transmitting substrate plated with an anti-reflective film, and the polarization spectral region may be a light-transmitting substrate plated with a polarization spectral film (for example, one that reflects or transmits S light and transmits or reflects P light). The supplement light transmission region may be a light-transmitting substrate plated with a dichroic film, which reflects the first and second colored light and transmits the supplement light. For example, as shown in Figure 13, assuming that the light generated by the excitation of the wavelength conversion region is green and red light, and the supplemental light generated by the supplemental light source 131 is red laser light, the spectrophotometric / combiner element reflects red, blue, and green light, and the supplemental light, which is red laser light, is transmitted through the supplemental light transmission region, which is a diffusion sheet, through holes, or a light-transmitting substrate plated with an anti-reflective coating. The size of the supplemental light transmission region is not limited and can be, for example, within the range of 8 mm * 8 mm, or for example, 5.5 mm * 3.6 mm. Selectively, the light source assembly further includes a group of focusing collimating lenses 134 corresponding to the supplemental light source.

[0082] Selectively, as shown in Figure 14, the adjustable element 07 has dichroic properties, reflecting the first color light and transmitting the supplemental light, for example, reflecting blue laser light and transmitting red and / or green laser light. Furthermore, the supplemental light transmitted through the adjustable element 07 may be incident on the third lens group 10 through the supplemental light transmission region of the spectrophotometric / photocombiner element 09.

[0083] Selectively, as shown in Figure 15, assume that light source 01 generates blue laser light in a first polarization state, and complementary light source 131 in the supplementary light source assembly 13 generates blue laser light and red-green laser light in a second polarization state. The adjustable element 07 may have polarization properties (by being plated with a polarizing spectrophotometer), reflecting the blue laser light in the first polarization state and transmitting the blue laser light and red-green laser light in the second polarization state. The blue laser light and red-green laser light transmitted through the adjustable element 07 may be incident on the third lens group 10 from the complementary light transmission region of the spectrophotometer / combinerator 09.

[0084] In some embodiments, the supplement light source assembly 13 includes a first supplement light source and a second supplement light source, and the supplement light includes light generated by the first color light source and light generated by the second color light source, and the first and second supplement light sources may generate light in the same wavelength range or light in different wavelength ranges, for example, both may generate red light, or one may generate red light and the other may generate blue light. The supplement light transmission region includes a first light transmission region and a second light transmission region, the first light transmission region transmits light generated by the first supplement light source, and the second light transmission region transmits light generated by the second supplement light source. For example, as shown in Figure 16, when the first light transmission region and the second light transmission region are provided close to both ends of the spectrophotometric / photocombiner element, the first supplement light source LD1 and the second supplement light source LD2 are both LD light sources that generate red laser light, and they transmit through the first and second light transmission regions, respectively.

[0085] In some embodiments, the supplement light source assembly 13 includes a polarization synthesizer, and the supplement light source assembly 13 includes a first supplement light source and a second supplement light source that generate light having different polarization states. The light having different polarization states generated by the first and second supplement light sources is photosynthesized by the polarization synthesizer and then incident on the supplement light transmission region. Selectively, the first and second supplement light sources may generate light with the same polarization state, and the light generated by one light source may be converted to light with a different polarization state by a phase conversion element (e.g., a quarter-wave plate) and then photosynthesized by the polarization synthesizer.

[0086] Here, the polarization synthesis element may be a polarizing beam splitter (PBS) or a polarization separation sheet, and photosynthesis can be performed on light having different polarization states by utilizing the polarization characteristics of the PBS. Accordingly, the supplemental light transmission region may be a through hole, a light-transmitting substrate, a diffuser plate, or a polarization separation sheet. Selectively, as shown in Figure 17, light having different polarization states generated by the first supplemental light source LD1 and the second supplemental light source LD2 can be synthesized by the PBS and incident on the supplemental light transmission region. For example, the spectrophotometric / photocombining element 09 reflects blue laser light and red-green fluorescence, and transmits red and green laser light, which have different polarization states, with a reflection wavelength range of 420-620 nm and a transmission wavelength range of 635-680 nm, and the supplemental light, which is red and green laser light, passes through the supplemental light transmission region. Selectively, the first supplementary light source LD1 generates red, green, and blue laser light in a first polarization state, and the second supplementary light source LD2 generates red, green, and blue laser light in a second polarization state. After being combined by a polarization separation sheet, the light is incident on the supplementary light transmission region of the spectrophotometric / photocombiner element.

[0087] In some embodiments, the supplement light transmission region reflects light in a first polarization state and transmits light in a second polarization state, and the supplement light includes a target light that can excite a wavelength conversion region to generate a second color light, and the target light is light in the first polarization state. The color filter element 11 in the light source system includes a region that can reflect the target light. Here, the first and second polarization states are not limited, and for example, the first polarization state may be a P state and the second polarization state may be an S state. The target light may be blue light (e.g., blue laser light), UV light, etc. The phase conversion element may be a quarter-wave plate.

[0088] When the first color light is focused by the first lens group and incident on the wavelength conversion region, the target light is incident on the color filter element 11 via the supplemental light transmission region and the phase conversion element 14, reflected by the color filter element 11, converted again to light in a second polarization state by the phase conversion element 14, incident on the supplemental light transmission region, reflected by the supplemental light transmission region, and finally incident on the wavelength conversion region. The first color light generated by the light source and the target light generated by the supplemental light source assembly 13 can be fully utilized, and the light utilization rate can be improved.

[0089] For example, assume that the first color light is a blue laser light in state P, the target light is a blue laser light in state S, and the supplement light transmission region transmits the light in state S and reflects the light in state P. The supplement light source assembly further generates red and green laser light. The wavelength conversion region includes sub-region 1 which generates red light and sub-region 2 which generates green light.

[0090] As shown in Figure 18, when the light source system needs to generate blue light, light source 01 generates blue laser light in state P, and the supplemental light source assembly 13 generates blue laser light in state S. The blue laser light generated by the light source 01 passes through the beam reduction lens group 05, the diffusion element 06, the target light transmission region of the light guide element 02, and the first lens group 03, and is incident on the reflection region of the wavelength conversion element 04. The reflection region reflects the blue laser, passes through the first lens group 03 and the light guide element 02, and is incident on the adjustable element 07. The adjustable element 07 reflects it back to the light guide element 02, passes through the light guide element 02 and the second lens group 08, and is incident on the spectrophotometric / photocombiner element 09. After being reflected by the spectrophotometric / photocombiner element 09, it photosynthesizes with the blue laser light in the S state generated by the supplemental light source assembly 13, which passes through the supplemental light transmission region of the spectrophotometric / photocombiner element 09. After photosynthesis, it is incident on the third lens group 10, focused by the third lens group 10, and incident on the color filter element 11. After being filtered by the filter region corresponding to blue light in the color filter element 11, the light is incident on the light uniformizing element 12, uniformized by the light uniformizing element 12, and then emitted.

[0091] When the light source system needs to generate red light, light source 01 generates blue laser light in the P state, and the supplemental light source assembly 13 generates blue laser light and red laser light in the S state. The blue laser light generated by light source 01 passes through the reduction lens group 05, the diffusion element 06, the target light transmission region of the light guide element 02, and the first lens group 03, and is incident on the sub-region 1 of the wavelength conversion element 04, where the sub-region 1 is excited by the blue laser light to generate red light. The blue laser light in the S state generated by the supplemental light source assembly 13 is incident on the color filter element 11 via the supplemental light transmission region and the phase conversion element 14, is reflected by the region of the color filter element 11 other than the color filter region corresponding to the blue light, is converted back into blue laser light in the P state by the phase conversion element 14, is incident on the supplemental light transmission region, is reflected by the supplemental light transmission region, and is finally incident on the sub-region 1 of the wavelength conversion element 04, exciting the sub-region 1 to generate red light. The excited red light is incident on the first lens group 03, then incident on the light guide element 02 via the first lens group 03, reflected by the light guide element 02, passes through the second lens group 08 and is incident on the spectroscopic / combiner element 09, reflected by the spectroscopic / combiner element 09, passes through the third lens group 10 and is incident on the color filter element 11, filtered by the filter region corresponding to the red light in the color filter element 11, then incident on the light homogenization element 12, homogenized by the light homogenization element 12 and emitted. If the light source system needs to generate green light, the process is the same as the generation of red light described above, so it will not be explained here.

[0092] As can be seen from the above, in the light source system according to this embodiment, when the first color light generated by the light source is incident on the lens group via the light guide element or directly on the lens group while avoiding the light guide element, a certain distance is maintained between the optical axis of the spot and the optical axis of the lens group, and the light is focused by the lens group to become excitation light in the wavelength conversion region. This reduces the loss of the first color light and the excited second color light in the light guide element, and by making the spot formed when the excited second color light is finally incident on the light uniformizing element elliptical, the utilization rate of light can be improved in accordance with the long and short sides of the light uniformizing element. Furthermore, by installing a diffusion element before the light source is incident on the wavelength conversion region, the light energy density in the wavelength conversion region can be reduced, and the excitation efficiency of the wavelength conversion material can be improved. The light guide element may be a through hole, and by having the first color light incident on the lens group through the through hole, the loss of the first color light during transmission can be reduced. At the same time, by installing a beam reduction lens group before the light source enters the light guide element, the area of ​​the through-hole can be reduced, the overlap area between the through-hole and the spot of the second color light is reduced, and the loss of the second color light is reduced. The light source system of this embodiment can improve the light utilization rate and improve the brightness of the projection device.

[0093] Figure 19 is a schematic diagram of the functional module of the projection device according to the present invention. As shown in Figure 19, the projection device includes an image processor 101 and a projection optical engine 102. Here.

[0094] The image processor 101 may be a microcontroller, a dedicated image processing chip, etc. The microcontroller may be an ARM chip, a Microcontroller Unit (MCU), etc. The dedicated image processing chip may be an Image Signal Processing ISP, a graphics processing unit (GPU), an embedded neural network processor (NPU), etc. The image processor 101 may be used for motion image decoding, image quality processing, etc.

[0095] The projection optics engine 102 may include a driver chip, a spatial light modulator, and the light source system described in the above embodiment. Here, the spatial light modulator may be a digital micromirror device (DMD), a liquid crystal display (LCD), a silicon liquid crystal device (Liquid Crystal on Silicon LCOS), etc. The driver chip corresponds to the spatial light modulator, and for example, a digital micromirror device can be driven using digital light processing (DLP). The projection optics engine 102 is used to project the image to be projected onto the projection screen.

[0096] In some embodiments, the projection device further includes a central controller 103 having one or more processing cores, the central controller being a controller such as a CPU, ARM, or MCU. The central controller 103 is the control center of the projection device, connecting all parts of the entire projection device using various interfaces and lines, driving or executing software programs and / or operating systems stored in memory 104, and retrieving data stored in memory 104. Selectively, the image processor 101 and the central controller 103 may be integrated as a single processor.

[0097] In some embodiments, the projection device further includes components such as one or more computer-readable storage media, memory 104, an input module 105, a communication module 106, and a power supply 107. As will be apparent to those skilled in the art, the structure of the projection device shown in Figure 19 does not constitute a limitation on the projection device, and may include more or fewer components than those shown, may be a combination of several components, or may include different arrangements of components.

[0098] Memory 104 is used to store software programs and operating systems, and the central controller 103 executes various functional applications and data processing by running the software programs and operating systems stored in memory 104. Memory 104 may mainly include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function (e.g., audio playback function, image playback function, etc.). The data storage area may store data created in accordance with the use of the projection device. Memory 104 may also include high-speed random access memory and non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory 104 may further include a memory controller to provide access to memory 104 by the central controller 103.

[0099] The projection device may further include an input module 105, which may be used to receive input numerical or character information and generate remote control, keyboard, mouse, joystick, optical, or trackball signal inputs relating to user settings and function control.

[0100] The projection device may further include a communication module 106, and in some embodiments, the communication module 106 may include a wireless module, and the projection device can perform short-range wireless transmission by the wireless module of the communication module 106, thereby providing the user with wireless broadband internet access. For example, the communication module 106 may be used to help the user access streaming media.

[0101] The projection device further includes a power supply 107 that supplies power to each component. In some embodiments, the power supply 107 is logically connected to a central controller 103 by a power management system, which enables functions such as charging, discharging, and power consumption management. The power supply 107 may further include any components such as one or more DC or AC power supplies, a recharging system, a power fault detection circuit, a power converter or inverter, and a power status indicator.

[0102] The terminology used in the embodiments of this application is intended solely to describe specific embodiments and is not intended to limit this application. The singular forms “one kind,” “the said,” and “the said” used in the embodiments and the appended claims are intended to include the plural forms unless the context clearly indicates otherwise. The term “and / or” as used herein should be understood to include any or all possible combinations of one or more related enumerated items. The letter “ / ” in this specification generally indicates that the preceding and following related items are in an “or” relationship.

[0103] The above description is merely a description of specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. All modifications or substitutions that can be easily conceived within the technical scope disclosed herein by a person with ordinary skill in the art to which the present invention pertains are included within the scope of protection of the present application. Accordingly, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A light source system, The light source system includes a light source, a first lens group, a wavelength conversion element, an optical guide assembly, and an optical uniformizing element, wherein the optical guide assembly includes an optical guide element, and the wavelength conversion element includes a wavelength conversion region and a reflection region. The first color light generated by the light source is incident on the first lens group via the light guide element, or the first color light generated by the light source is incident on the first lens group. When the first color light is focused by the first lens group and incident on the wavelength conversion region, the wavelength conversion region is excited by the first color light and emits a second color light, the second color light is incident on the first lens group, and then incident on the optical guide assembly via the first lens group. When the first colored light is focused by the first lens group and incident on the reflection region, the first colored light is reflected by the reflection region and incident on the optical guide assembly via the first lens group. The first or second colored light incident on the optical guide assembly is incident on the optical homogenizing element via the optical guide assembly, homogenized by the optical homogenizing element, and emitted. A light source system characterized in that the spot of second color light emitted from the first lens group is elliptical, and the distance between the optical axis of the first color light incident on the first lens group from the light source and the optical axis of the first lens group is a first distance.

2. A beam reduction lens group is further provided between the light source and the light guide element, and the first color light generated by the light source is beam-reduced by the beam reduction lens group and incident on the light guide element. The light source system according to feature 1.

3. A diffusion element is further provided between the light source and the light guide element, and the first color light generated by the light source is diffused and homogenized by the diffusion element and incident on the light guide element, and the diffusion angle of the diffusion element is a first angle. The light source system according to feature 1.

4. An aperture is provided on the side of the light guide element facing the light source, and the first colored light generated by the light source is incident on the light guide element through the aperture. The light source system according to feature 1.

5. The first lens group includes at least one aspherical mirror and at least one spherical mirror, wherein the radius of curvature range of one face of the aspherical mirror is within a first preset radius range, the surface coefficient range is within a first preset coefficient range, the radius of curvature of the other face is within a first preset radius range, the surface coefficient range is within a second coefficient range, the radius of curvature range of one face of the spherical mirror is within a second preset radius range, and the radius of curvature of the other face is within a third preset radius range. The light source system according to feature 1.

6. The light guide element includes a target light transmission region, and the first color light generated by the light source is transmitted from the target light transmission region to the first lens group. The length of the target side of the target light transmission region is determined based on the length of the long side of the light guide element, the first distance, and the length of the major axis of the spot of the first color light. The light source system according to feature 1.

7. The distance between the lens closest to the wavelength conversion element in the first lens group and the wavelength conversion element is the second distance. and / or, the angle between the light guide element and the wavelength conversion element is a second angle, and / or, the angle between the central ray of the first color light incident on the wavelength conversion element from the first lens group and the normal to the wavelength conversion element is greater than or equal to a preset angle. and / or, the light guide element includes a target light transmission region, the target light transmission region being one of a through hole, a diffusion region, an anti-reflection region, a polarization spectroscopic region, or a dichroic region. The light source system according to feature 1.

8. The optical guide assembly includes an adjustable element and a spectrophotometric / photocombiner element. The first and second spots of colored light are incident symmetrically on the light homogenizing element, and the major and minor axes of the second and / or first spots of colored light correspond to the major and minor sides of the light incident surface of the light homogenizing element, and / or the distance between the adjustable element and the light guide element or the spectrophotometric / combiner element is a third distance. The light source system according to feature 1.

9. The light source system further includes a color filter element, wherein the first or second colored light incident on the optical guide assembly is incident on the color filter element via the optical guide assembly, filtered by the color filter element, and then incident on the light uniformizing element, of which, The optical guide assembly includes an adjustable element, a second lens group, a spectrophotometric / photocombiner element, and a third lens group, wherein the optical guide element reflects first and second colored light, the spectrophotometric / photocombiner element transmits the first colored light and reflects the second colored light, the second colored light is incident on the optical guide element via the first lens group, reflected by the optical guide element, then transmitted through the second lens group and incident on the spectrophotometric / photocombiner element, reflected by the spectrophotometric / photocombiner element to the third lens group, and incident on the color filter element via the third lens group, the first colored light reflected in the reflection region is incident on the optical guide element, reflected by the optical guide element, then transmitted through the second lens group and the spectrophotometric / photocombiner element and incident on the adjustable element, reflected by the adjustable element, then transmitted through the spectrophotometric / photocombiner element and incident on the third lens group, and incident on the color filter element via the third lens group, Alternatively, the optical guide assembly includes an adjustable element, a second lens group, a spectrophotometric / photocombiner element, and a third lens group, wherein the optical guide element reflects first and second colored light, the adjustable element transmits the second colored light and reflects the first colored light, the first colored light reflected in the reflection region is incident on the optical guide element, reflected by the optical guide element, then transmitted through the second lens group and incident on the adjustable element, reflected by the adjustable element to the third lens group, and incident on the color filter element via the third lens group, and the second colored light is incident on the optical guide element via the first lens group, reflected by the optical guide element, then transmitted through the second lens group and the adjustable element and incident on the spectrophotometric / photocombiner element, reflected by the spectrophotometric / photocombiner element to the third lens group, and incident on the color filter element via the third lens group, or Alternatively, the optical guide assembly includes an adjustable element and a third lens group, wherein the optical guide element transmits a first color light and reflects a second color light, the first color light reflected in the reflection region is incident on the optical guide element, passes through the optical guide element and is incident on the adjustable element, is reflected by the adjustable element and returns to the optical guide element, passes through the optical guide element and the third lens group and is incident on the color filter element, and the second color light is incident on the optical guide element via the first lens group, is reflected by the optical guide element, and then passes through the third lens group and is incident on the color filter element, Alternatively, the optical guide assembly includes an adjustable element, a second lens group, a spectrophotometric / photocombiner element, and a third lens group, wherein the optical guide element transmits a first color light and reflects a second color light, the first color light reflected in the reflection region is incident on the optical guide element, passes through the optical guide element and is incident on the adjustable element, is reflected by the adjustable element and returns to the optical guide element, passes through the optical guide element and the second lens group and is incident on the spectrophotometric / photocombiner element, is incident on the color filter element via the spectrophotometric / photocombiner element and the third lens group, or, the second color light is incident on the optical guide element via the first lens group, is reflected by the optical guide element, passes through the second lens group and is incident on the spectrophotometric / photocombiner element, is incident on the color filter element via the spectrophotometric / photocombiner element and the third lens group, Alternatively, the optical guide assembly includes an adjustable element, a second lens group, a spectrophotometric / photocombiner element, and a third lens group, wherein the adjustable element reflects a first color light and transmits a second color light, the light guide element reflects the second color light, the first color light reflected in the reflection region is incident on the adjustable element, reflected by the adjustable element to the second lens group, incident on the spectrophotometric / photocombiner element via the second lens group, incident on the color filter element via the spectrophotometric / photocombiner element and the third lens group, and the second color light is incident on the adjustable element via the first lens group, transmitted through the adjustable element to the light guide element, reflected by the light guide element, incident on the second lens group, transmitted through the second lens group to the spectrophotometric / photocombiner element, and incident on the color filter element via the spectrophotometric / photocombiner element and the third lens group. Alternatively, the optical guide assembly includes an adjustable element and a third lens group, wherein the adjustable element reflects a first color light and transmits a second color light, the light guide element reflects the second color light, the first color light reflected in the reflection region is incident on the adjustable element, reflected by the adjustable element to the third lens group, and incident on the color filter element via the third lens group, and the second color light is incident on the adjustable element via the first lens group, transmitted through the adjustable element to the light guide element, reflected by the light guide element, incident on the third lens group, and incident on the color filter element via the third lens group, Alternatively, the optical guide assembly includes a third lens group, the light guide element reflects a first color light and a second color light, the first color light reflected in the reflection region is incident on the light guide element, reflected by the light guide element, passes through the third lens group and is incident on the color filter element, the second color light is incident on the light guide element via the first lens group, reflected by the light guide element, passes through the third lens group and is incident on the color filter element. The light source system according to feature 1.

10. The light source system further includes a supplemental light source assembly, The light source system includes a spectrophotometric and photocombiner element, the spectrophotometric and photocombiner element reflects a first color light and a second color light, and transmits the supplement light generated by the supplement light source, Alternatively, the spectrophotometric / photocombiner element reflects the second color light and transmits the first color light and the supplemental light generated by the supplemental light source. The adjustable element reflects the first color light and transmits the supplement light generated by the supplement light source. The light source system according to feature 1.

11. The spectroscopic and photocombining element includes a supplement light transmission region, and the supplement light transmission region transmits the supplement light generated by the supplement light source. Here, the supplemental light transmission region is one of a through-hole, a diffusion region, an anti-reflection region, a polarization spectroscopy region, or a dichroic region. The light source system according to claim 10.

12. The supplement light source assembly includes a first supplement light source and a second supplement light source, and the supplement light includes light generated by the first color light source and light generated by the second color light source. The supplement light transmission region includes a first light transmission region and a second light transmission region, wherein the first light transmission region transmits light generated by the first supplement light source, and the second light transmission region transmits light generated by the second supplement light source. The light source system according to feature 11.

13. The supplemental light source assembly includes a polarization combining element, the supplemental light source assembly includes a first supplemental light source and a second supplemental light source, the first supplemental light source and the second supplemental light source generate light having different polarization states, Light having different polarization states generated by the first and second supplemental light sources is photosynthesized by the polarization synthesizing element and then incident on the supplemental light transmission region. The light source system according to feature 11.

14. The supplemental light transmission region reflects light in a first polarization state and transmits light in a second polarization state, and the supplemental light includes target light that can excite the wavelength conversion region to generate a second color light, and the target light is light in a first polarization state. The light source system further includes a color filter element, the color filter element includes a region capable of reflecting the target light, and a phase conversion element is provided between the color filter element and the spectrophotometric / photocombiner element. When the first color light is focused by the first lens group and incident on the wavelength conversion region, the target light is incident on the color filter element via the supplemental light transmission region and the phase conversion element, reflected by the color filter element, converted again by the phase conversion element into light of a second polarization state, incident on the supplemental light transmission region, reflected by the supplemental light transmission region, and finally incident on the wavelength conversion region. The light source system according to feature 11.

15. The light source system further includes a supplemental light source assembly, and the wavelength conversion element includes a transmission region. The supplemental light generated by the supplemental light source assembly is incident on the first lens group through the transmission region of the wavelength conversion element, incident on the optical guide assembly through the first lens group, incident on the optical homogenizing element through the optical guide assembly, and after being homogenized by the optical homogenizing element, is emitted. The light source system according to feature 1.

16. The light source system further includes a supplement light source assembly, wherein the supplement light generated by the supplement light source assembly is incident on the optical guide assembly via the optical guide element, incident on the optical uniformizing element via the optical guide assembly, and after being uniformized by the optical uniformizing element, is emitted. The light source system according to feature 1.

17. A light source system according to any one of claims 1 to 16, A projection device characterized by the following features.

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