CN111435198A - Collimation color combination system and lighting system - Google Patents
Collimation color combination system and lighting systemDownload PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/141—Beam splitting or combining systems operating by reflection only using dichroic mirrors
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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Abstract
Description
Technical Field
The invention relates to the technical field of light source illumination, in particular to a collimation and color combination system and an illumination system.
Background
In recent years, the advent of micro display chip technology has made possible miniaturization and high-resolution projection display. With the continuous development of projection display technology and market demand, wearable micro projection light engines with large view field, high imaging quality and small volume are more and more emphasized, especially in the fields of developing fire-heat Augmented Reality (AR), Near-eye display (NED) and wearable at present.
However, in order to realize a color display of a micro projection light engine, it is necessary to provide it with color-combined light by an illumination system. The existing illumination system usually employs a color-combining prism such as an X-prism to combine three primary colors of light from three light paths into the same light path, for example, the chinese patent application No. 99104851.2 entitled "light selecting prism, projection display using the prism and method for manufacturing the prism". Specifically, the X-prism is generally formed by gluing 4 right-angle prisms along right-angle surfaces, and the inclined surfaces of the right-angle prisms are used as the input surface and the output surface of light; the red, green and blue three-primary-color polarized light sources respectively correspond to the inclined planes of the three right-angle prisms, and the inclined plane of the other right-angle prism is used as the output surface of the white light synthesized by the three primary-color light. Therefore, although the existing illumination system can synthesize three primary-color polarized lights into one white light, the illumination system is limited by the influence of its own structure (for example, three primary-color polarized light sources are separately arranged, and four right-angle prisms have heavy weights), so that the volume and the weight of the illumination system are both large, and thus the size and the weight of the micro projection light engine are large, and the market demands for small volume and light weight are difficult to meet.
In addition, there are also chinese inventions which use three color combining mirrors arranged in parallel to combine three primary colors from three light paths into the same light path, for example, the patent application No. 201610613057.8 entitled "optical engine for color projection display". Specifically, three primary color light emitted from a parallel light source is modulated into three primary color image light by a reflective flat panel display, and the three primary color image light is reflected to three color-combining mirrors arranged in parallel, respectively, so that the three primary color image light is color-mixed in space by the three color-combining mirrors to form a color image. However, in order to avoid a certain color combining mirror from blocking other color combining mirrors to ensure that the three primary color image lights are respectively reflected to the corresponding color combining mirrors, sufficient space needs to be reserved between the three color combining mirrors in the illumination system, which leads to the volume of the illumination system to be further enlarged, and further leads to the size of the corresponding micro projection light engine to be increased, and thus the market demand for the micro projection light engine with small volume is more difficult to meet. In addition, since different regions of the reflective flat panel display are used for modulating and reflecting light of different primary colors, and the color combiner directly mixes the color of the three primary color images, the micro projection light engine has to make a special reflective flat panel display, and the requirements on the quality and precision of the color combiner are also extremely strict, which causes the manufacturing cost of the micro projection light engine to be dramatically increased, which is not favorable for wide application and popularization in the fields of augmented reality, near-eye display, wearable, and the like.
Disclosure of Invention
An object of the present invention is to provide a collimated color combining system and an illumination system, which can reduce the size and weight of the illumination system, and is favorable for meeting the market demand for a small-sized and light-weight micro projection light engine.
It is another object of the present invention to provide a collimated color combining system and an illumination system, wherein, in an embodiment of the present invention, the collimated color combining system has a compact structure, which helps to reduce the size of the illumination system, and thus the volume of the micro projection light engine.
Another object of the present invention is to provide a collimated color combining system and an illumination system, wherein, in an embodiment of the present invention, the collimated color combining system can combine three primary lights into one combined light in a small space, which helps to reduce the space required by the illumination system.
It is another object of the present invention to provide a collimated color combining system and an illumination system, wherein, in an embodiment of the present invention, the three primary color light emitting units of the illumination system adopt a three-in-one packaging technology, which helps to further reduce the volume of the illumination system.
It is another object of the present invention to provide a collimated color combining system and an illumination system, wherein, in an embodiment of the present invention, the collimated color combining system is light in weight, which helps to reduce the weight of the illumination system.
It is another object of the present invention to provide a collimated color combining system and an illumination system, wherein, in an embodiment of the present invention, the illumination system is small and can be widely applied in the conventional projection field.
It is another object of the present invention to provide a collimated color combining system and an illumination system in which the use of expensive materials or complicated structures is not required in order to achieve the above objects. The present invention thus successfully and efficiently provides a solution that not only provides a simple collimating and color combining system and illumination system, but also increases the practicality and reliability of the collimating and color combining system and illumination system.
To achieve at least one of the above objects or other objects and advantages, the present invention provides a collimated color combining system, comprising:
the primary color light-emitting unit is provided with a light-emitting path and is used for emitting a first primary color light, a second primary color light and a third primary color light along the light-emitting path;
a collimating unit disposed in the light emitting path of the primary light emitting unit for collimating the first, second and third primary lights from the primary light emitting unit; and
a color combination unit, wherein the color combination unit is disposed in the light emitting path of the primary color light emitting unit, and the color combination unit comprises:
a substrate assembly, wherein the substrate assembly is disposed on the light emitting path of the primary color light emitting unit, and sequentially disposed with a first functional surface, a second functional surface and a third functional surface along the light emitting path, wherein the first, second and third functional surfaces of the substrate assembly and the light emitting path respectively have a first, second and third predetermined included angles therebetween, and the first, second and third predetermined included angles are sequentially smaller;
a first film layer, wherein the first film layer is disposed on the first functional surface of the base assembly, and is used for transmitting the second and third primary lights emitted by the primary light emitting units and reflecting the first primary light emitted by the primary light emitting units, so that the first primary light propagates along a predetermined light path;
a second film layer, disposed on the second functional surface of the base assembly, for transmitting the third primary color light transmitted through the first film layer and reflecting the second primary color light transmitted through the first film layer, so that the second primary color light propagates along the predetermined light path after passing through the first film layer; and
a third film layer, wherein the third film layer is disposed on the third functional surface of the base assembly, and is configured to reflect a third primary color light transmitted through the second film layer, so that the third primary color light propagates along the predetermined optical path after passing through the second and first film layers, and thus the first, second, and third primary colors reflected by the first, second, and third film layers respectively are combined into a combined color light propagating along the predetermined optical path.
In one embodiment of the present invention, the base assembly comprises a wedge prism and a substrate, wherein the top surface of the wedge prism is the first functional surface and the bottom surface of the wedge prism is the second functional surface, wherein the substrate is located at the bottom side of the wedge prism and the side surface of the substrate adjacent to the wedge prism is the third functional surface.
In an embodiment of the invention, the base assembly comprises a wedge prism and a substrate, wherein the substrate is located on the top side of the wedge prism, and the side of the substrate remote from the wedge prism is the first functional surface, wherein the top surface of the wedge prism is the second functional surface, and the bottom surface of the wedge prism is the third functional surface, wherein the substrate is made of a transparent material.
In an embodiment of the invention, the first, second and third primary color lights emitted by the primary color light emitting units are red light, green light and blue light in sequence.
In an embodiment of the invention, the first film layer is a red light reflecting film for reflecting red light and transmitting green light and blue light.
In an embodiment of the invention, the second film layer is a green light reflecting film for reflecting green light and transmitting red light and blue light.
In an embodiment of the invention, the second film layer is a blue light-transmitting film for transmitting blue light and reflecting red light and green light.
In an embodiment of the invention, the third film layer is a blue light reflecting film for reflecting blue light and transmitting red light and green light.
In an embodiment of the invention, the third film layer is a total reflection film for totally reflecting the red light, the green light and the blue light.
In an embodiment of the present invention, the first predetermined included angle ranges from 47 ° to 57 °; wherein the second predetermined included angle is in the range of 43-53 °; wherein the third predetermined included angle is in the range of 36 ° to 46 °.
In an embodiment of the invention, the primary color light emitting unit includes at least one red light emitting module, at least one green light emitting module, and at least one blue light emitting module, wherein the red light emitting module, the green light emitting module, and the blue light emitting module are packaged into the primary color light emitting unit by a three-in-one packaging method, and are configured to emit red light, green light, and blue light toward the first film layer of the color combination unit, respectively.
According to another aspect of the present invention, there is further provided an illumination system for providing illumination to a display unit, comprising:
the collimating and color-combining system of any one of the above, configured to provide a combined color light propagating along a predetermined optical path of the collimating and color-combining system; and
and the relay system is arranged on the preset optical path of the collimation color combination system and is used for transmitting the color combination light from the collimation color combination system to the display unit so as to modulate the color combination light into light carrying image information through the display unit.
In an embodiment of the invention, the illumination system further includes a light uniformizing system, wherein the light uniformizing system is disposed between the collimated color combining system and the relay system, and is located in the predetermined optical path of the collimated color combining system, and is configured to uniformize the combined color light from the collimated color combining system.
In an embodiment of the invention, the illumination system further includes a polarization multiplexing system, wherein the polarization multiplexing system is disposed between the light uniformizing system and the relay system, and is configured to convert the color-combined light homogenized by the light uniformizing system into polarized light with the same polarization state, and the relay system is further configured to transmit the polarized light to the display unit, so as to modulate the polarized light into polarized light carrying image information through the display unit.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.
Drawings
Fig. 1 is a schematic structural diagram of a color collimating and combining system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the light path of the collimated color combining system according to the above embodiment of the invention.
Fig. 3 shows a schematic reflection spectrum diagram of the first film layer of the color combining unit of the collimated color combining system according to the above embodiment of the invention.
Fig. 4 shows a schematic reflection spectrum diagram of the second film layer of the color combining unit of the collimated color combining system according to the above embodiment of the invention.
Fig. 5 shows a first variant implementation of the collimated color combining system according to the above embodiment of the invention.
Fig. 6 shows a second variant implementation of the collimated color combining system according to the above embodiment of the invention.
Fig. 7 shows a third variant implementation of the collimated color combining system according to the above embodiment of the invention.
Fig. 8 shows a fourth variant implementation of the collimated color combining system according to the above embodiment of the invention.
Fig. 9 is a system diagram of an illumination system according to an embodiment of the invention.
Fig. 10 shows a schematic structural diagram of the illumination system according to the above embodiment of the present invention.
Fig. 11 shows another schematic structural diagram of the illumination system according to the above embodiment of the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
In the present invention, the terms "a" and "an" in the claims and the description should be understood as meaning "one or more", that is, one element may be one in number in one embodiment, and the element may be more than one in number in another embodiment. The terms "a" and "an" should not be construed as limiting the number unless the number of such elements is explicitly recited as one in the present disclosure, but rather the terms "a" and "an" should not be construed as being limited to only one of the number.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
In recent years, with the advent of micro display chip technology, miniaturization and high-resolution projection display have become possible. However, in order to realize color display, the lighting system of the micro projection light engine has to combine three primary lights into one combined light to illuminate the corresponding display unit. However, the collimating and color-combining system of the existing lighting system is large in size and heavy in weight, which results in that the micro projection light engine cannot meet the strict requirements of the current augmented reality, near-eye display and wearable products on size and weight due to the limitations of its own size and weight. Therefore, there is a need for a small enough and light-weight collimated color combining system to obtain a small and light-weight illumination system to meet the market demand.
Referring to fig. 1-4 of the drawings, a collimated color combining system according to one embodiment of the present invention is illustrated. As shown in fig. 1 and fig. 2, the collimating and color-combiningsystem 10 includes a primary light-emittingunit 11, a color-combiningunit 12, and acollimating unit 13. The primarylight emitting unit 11 has alight emitting path 110 for emitting a firstprimary light 1101, a secondprimary light 1102 and a thirdprimary light 1103 along thelight emitting path 110. Thecollimating unit 13 is disposed in thelight emitting path 110 of the primarylight emitting unit 11 for collimating the first, second and thirdprimary light light emitting unit 11. Thecolor combination unit 12 is disposed in thelight emitting path 110 of the primary colorlight emitting unit 11, and thecollimating unit 13 is disposed between the primary colorlight emitting unit 11 and thecolor combination unit 12, wherein thecolor combination unit 12 is configured to combine the first, second, and thirdprimary color lights collimating unit 13 into a combinedcolor light 1104, thereby ensuring that the lighting system equipped with the collimatedcolor combination system 10 can emit the combined color light, so that the corresponding projection light engine can project a color image.
Specifically, as shown in fig. 1, thecolor combining unit 12 includes afirst film 121, asecond film 122, athird film 123, and abase member 124. Thesubstrate assembly 124 is disposed on the light-emittingpath 110 of the primary light-emittingunit 11, and a firstfunctional surface 12401, a secondfunctional surface 12402 and a thirdfunctional surface 12403 are sequentially disposed along the light-emittingpath 110 of the primary light-emittingunit 11, wherein a first, a second and a third predetermined included angles θ are respectively formed between the first, the second and the thirdfunctional surfaces substrate assembly 124 and the light-emittingpath 110 of the primary light-emittingunit 111、θ2、θ3And the first, second and third predetermined angles θ1、θ2、θ3And become smaller in turn.
Accordingly, thefirst film 121 is disposed on the firstfunctional surface 12401 of thesubstrate assembly 124 for transmitting the second and thirdprimary lights unit 11 and reflecting the firstprimary light 1101 emitted by the primary light-emittingunit 11, so that the firstprimary light 1101 travels along a predeterminedlight path 100. Thesecond film 122 is disposed on the secondfunctional surface 12402 of thebase member 124, and is configured to transmit the thirdprimary color light 1103 transmitted through thefirst film 121 and reflect the secondprimary color light 1102 transmitted through thefirst film 121, so that the secondprimary color light 1102 propagates along the predeterminedlight path 100 after passing through thefirst film 121. Thethird film layer 123 is disposed on the thirdfunctional surface 12403 of thebase member 124, and is configured to reflect the thirdprimary color light 1103 transmitted through thesecond film layer 122, so that the thirdprimary color light 1103 propagates along the predeterminedlight path 100 after passing through the second and first film layers 122, 121, and thus the first, second, and thirdprimary color lights color light 1104 propagating along the predeterminedlight path 100. It is understood that the predeterminedlight path 100 is designed according to the structure of the collimating and color-combiningsystem 10, and the predeterminedlight path 100 is not parallel to the light-emittingpath 110 of the primary light-emittingunit 11, which is not described in detail herein.
Illustratively, as shown in fig. 2, the first, second, and thirdprimary colors first film layer 121 is implemented as a redlight reflecting film 1211, wherein the redlight reflecting film 1211 is used for reflecting red light and transmitting green light and blue light, for example, the reflection spectrum of the redlight reflecting film 1211 can be shown as the thick solid line portion in fig. 3; thesecond film layer 122 is implemented as a blue light-transmittingfilm 1221, wherein the blue light-transmittingfilm 1221 is used for transmitting blue light and reflecting red light and green light, for example, the reflection spectrum of the blue light-transmittingfilm 1221 can be shown as a thick solid line portion in fig. 4; thethird film 123 is implemented as atotal reflection film 1231 for totally reflecting red, green, and blue light.
In particular, the first and second film layers 121 and 122 may also have a depolarization effect to reduce the separation degree of P light and S light, which helps to improve the light energy utilization efficiency of the whole system. In other words, in this embodiment of the present invention, the redlight reflecting film 1221 has a function of depolarization in addition to a function of reflecting red light and transmitting green and blue light, for example, a reflection spectrum of the redlight reflecting film 1221 for P light and S light is shown in a dotted line portion and a dotted line portion in fig. 3; the blue light-transmittingfilm 1221 has a function of depolarization in addition to a function of transmitting blue light and reflecting red and green light, for example, a reflection spectrum of the blue light-transmittingfilm 1221 for P light and S light is shown by a dotted line portion and a dotted line portion in fig. 4.
It is noted that in other examples of the present invention, the first, second and thirdprimary colors primary colors primary colors primary color light
Preferably, as shown in FIG. 1, in this embodiment of the present invention, the first predetermined included angle θ between the firstfunctional surface 12401 of thesubstrate assembly 124 and the light-emittingpath 110 of the primary light-emittingunit 111Theta is more than or equal to 47 degrees1Less than or equal to 57 degrees; the second predetermined included angle θ between the secondfunctional surface 12402 and the predeterminedlight path 100 of the collimatedcolor combining system 102Theta is more than or equal to 43 degrees2Less than or equal to 53 degrees; the third predetermined included angle θ between the thirdfunctional surface 12403 and the predeterminedlight path 100 of the collimatedcolor combining system 103Theta is more than or equal to 36 degrees3Less than or equal to 46 degrees. In other words, the included angle between thefirst film layer 121 and the predeterminedlight path 100 of the collimatedcolor combining system 10 can be, but is not limited to, 47 ° to 57 °; the angle between thesecond film layer 122 and the predeterminedlight path 100 of the collimatedcolor combining system 10 can be, but is not limited to, 43-53 °; the angle between thethird film layer 123 and the predeterminedlight path 100 of the collimatedcolor combining system 10 can be, but is not limited to, 36 ° to 46 °.
More preferably, in this embodiment of the present invention, the first, second and third film layers 121, 122, 123 are sequentially plated on the first, second and thirdfunctional surfaces substrate assembly 124. Of course, in other examples of the present invention, the first, second and third film layers 121, 122, 123 may also be sequentially mounted on the first, second and thirdfunctional surfaces base assembly 124 by using a mounting method such as gluing, attaching, etc., and the present invention is not described herein again.
Further, in this embodiment of the present invention, as shown in fig. 1 and 2, thebase assembly 124 of thecolor combination unit 12 may include awedge prism 1241 and abase plate 1242, wherein thewedge prism 1241 is located between thebase plate 1242 and the primary colorlight emitting unit 11, that is, thebase plate 1242 is located on a side of thewedge prism 1241 away from the primary colorlight emitting unit 11, that is, thebase plate 1242 is located on a bottom side of thewedge prism 1241. The top side of the wedge-shapedprism 1241 is embodied as the firstfunctional side 12401, and the bottom side of the wedge-shapedprism 1242 is embodied as the secondfunctional side 12402; the side of thebase plate 1242 adjacent to thewedge prism 1241 is embodied as the thirdfunctional surface 12403. In addition, since the second and thirdprimary colors wedge prism 1241 but thesubstrate 1242, thewedge prism 1241 may be made of a transparent material, and thesubstrate 1242 may be made of a transparent, translucent, or opaque material. In addition, thesubstrate 1242 is not limited to be implemented as a plate-shaped material, and may be implemented as any other material with any shape capable of providing thefunctional surface 12401, which is not described in detail herein.
It should be noted that, just as the wedge-shapedprism 1241 and thebase plate 1242 included in thebase assembly 124 of thecolor combination unit 12 are lighter in weight and smaller in volume than the existing X-prism and color combination mirror, so that the weight and volume of the collimating andcolor combination system 10 are reduced, the collimating andcolor combination system 10 of the present invention can effectively reduce the weight and volume of the corresponding lighting system, and is convenient for meeting the strict requirements of augmented reality, near-eye display and wearable products on volume and weight.
In this embodiment of the present invention, as shown in fig. 1, the primary colorlight emitting unit 11 of the collimated and color-combinedsystem 10 includes at least one redlight emitting module 111, at least one greenlight emitting module 112, and at least one bluelight emitting module 113, wherein the red, green, and bluelight emitting modules unit 12, and are configured to emit red light, green light, and blue light along thelight emitting path 110 of the primary colorlight emitting unit 11, so that the emitted red light, green light, and blue light first pass through thecollimation unit 13 and then pass through the color-combiningunit 12 to combine the collimated red light, green light, and blue light into the combinedcolor light 1104 propagating along the predeterminedlight path 100.
It is noted that in this embodiment of the invention, the red, green and bluelight emitting modules
Preferably, the primary colorlight emitting unit 11 can be manufactured by three-in-one packaging of the red, green and bluelight emitting modules light reflecting unit 11, and thus the volume of the collimatedcolor combining system 10.
Exemplarily, as shown in fig. 2, the three light emitting modules in the primarylight emitting unit 11 are the red light emitting module, the green light emitting module, and the bluelight emitting module light path 100, and the red light, the green light, and the blue light emitted by the red light emitting module, the green light emitting module, and the bluelight emitting module collimating unit 13, and then cross each other before reaching thefirst film layer 121 of thecolor combining unit 12, so that the three primary lights irradiated onto thefirst film layer 121 are the blue light, the green light, and the red light in sequence along the direction of the predeterminedlight path 100. It is understood that in this embodiment of the present invention, the first, second and thirdprimary color lights
It should be noted that, due to the existence of thecollimating unit 13, although the first, second and thirdprimary lights light emitting unit 11 are parallel to each other, after being collimated by thecollimating unit 13, the first and thirdprimary lights primary light 1102 so as to cross each other before reaching thefirst film 121, which helps to reduce the gap between the threeprimary lights color combining system 10, and further reducing the volume of the lighting system. It will be understood by those skilled in the art that thecollimating unit 13 may be, but is not limited to being, implemented as a collimating lens.
Fig. 5 shows a first variant of the collimating and color-combiningsystem 10 according to the above-mentioned embodiment of the present invention, wherein thesubstrate 1242 of thebase assembly 124 of the color-combiningunit 12 of the collimating and color-combiningsystem 10 is located between the wedge-shapedprism 1241 and the primary color light-emittingunit 11, that is, thesubstrate 1242 is located on the side of the wedge-shapedprism 1241 adjacent to the primary color light-reflectingunit 11, that is, thesubstrate 1242 is located on the top side of the wedge-shapedprism 1241.
Specifically, as shown in fig. 5, the side of thebase plate 1242 of thebase assembly 124 that is away from thewedge prism 1241 is implemented as the firstfunctional surface 12401; while the top side of the wedge-shapedprism 1241 of thebase module 124 is embodied as the secondfunctional side 12402 and the bottom side of the wedge-shapedprism 1242 is embodied as the thirdfunctional side 12403. Thus, when the first, second and third film layers 121, 122, 123 are sequentially disposed on the first, second and thirdfunctional surfaces base assembly 124, thecolor combining unit 12 can also achieve the desired color combining effect.
It should be noted that, in the first modified embodiment of the present invention, since the second and thirdprimary color lights substrate 1242 and the thirdprimary color light 1103 needs to transmit through thewedge prism 1241, both thewedge prism 1241 and thesubstrate 1242 need to be made of transparent materials.
Of course, in another example of the present invention, thebase assembly 124 of thecolor combining unit 12 may also implement the side of thesubstrate 1242 adjacent to the wedge-shapedprism 1241 as the firstfunctional surface 12401, and thefirst film layer 121 is disposed on the firstfunctional surface 12401, so that the firstprimary color light 1101 is reflected by thefirst film layer 121 after passing through thesubstrate 1242. It is understood that thebase member 124 can be implemented as other types of members as long as the first, second and thirdfunctional surfaces
Fig. 6 shows a second variant implementation of the collimatedcolor combining system 10 according to the above embodiment of the invention, wherein thefirst film layer 121 of thecolor combining unit 12 of the collimatedcolor combining system 10 is implemented as a redlight reflecting film 1211, wherein the redlight reflecting film 1211 is used for reflecting red light and transmitting green light and blue light; thesecond film layer 122 is implemented as a greenlight reflecting film 1222, wherein the greenlight reflecting film 1222 is for reflecting green light and transmitting red and blue light; thethird film 123 is implemented as atotal reflection film 1231 for totally reflecting the red light, the green light, and the blue light, so that thecolor combining unit 12 can also achieve a desired color combining effect.
Fig. 7 shows a third variant implementation of the collimatedcolor combining system 10 according to the above embodiment of the invention, wherein thefirst film layer 121 of thecolor combining unit 12 of the collimatedcolor combining system 10 is implemented as a redlight reflecting film 1211, wherein the redlight reflecting film 1211 is used for reflecting red light and transmitting green light and blue light; thesecond film layer 122 is implemented as a blue light-transmittingfilm 1221, wherein the blue light-transmittingfilm 1221 is for transmitting blue light and reflecting red and green light; thethird film layer 123 is implemented as a bluelight reflecting film 1232 for reflecting blue light and transmitting red and green light, so that thecolor combining unit 12 can also achieve a desired color combining effect.
Fig. 8 shows a fourth variant implementation of the collimatedcolor combining system 10 according to the above embodiment of the invention, wherein thefirst film layer 121 of thecolor combining unit 12 of the collimatedcolor combining system 10 is implemented as a redlight reflecting film 1211 for reflecting red light and transmitting green and blue light; thesecond film layer 122 is implemented as the greenlight reflecting film 1222 to reflect green light and transmit red and blue light; thethird film layer 123 is implemented as the bluelight reflecting film 1232 for reflecting blue light and transmitting red and green light, so that thecolor combining unit 12 can also achieve a desired color combining effect.
According to another aspect of the present invention, as shown in fig. 9, an embodiment of the present invention further provides anillumination system 1 configured with the above-mentioned collimatedcolor combining system 10, for providing illumination light to adisplay unit 2 to modulate the illumination light into corresponding image light through thedisplay unit 2. Specifically, as shown in fig. 9, theillumination system 1 includes the above-mentioned collimatedcolor combining system 10 and arelay system 20. The collimatedcolor combining system 10 is configured to provide a combined color light propagating along a predetermined optical path of the collimatedcolor combining system 10. Therelay system 20 is disposed on the predetermined optical path of the collimated and color-combinedsystem 10, and is configured to transmit the color-combined light from the collimated and color-combinedsystem 10 to thedisplay unit 2, so as to modulate the color-combined light into light carrying image information through thedisplay unit 2. It is understood that therelay system 20 may be implemented as any type of relay system as long as it can ensure that therelay system 20 can transmit the combined color light from theillumination system 1 to thedisplay unit 2 and be modulated by thedisplay unit 2 into light carrying image information, and the invention is not further limited thereto.
Further, as shown in fig. 9, theillumination system 1 may further include alight homogenizing system 30, wherein thelight homogenizing system 30 is disposed between the collimating and color-combiningsystem 10 and therelay system 20 for homogenizing the color light combined from the collimating and color-combiningsystem 10, it is understood by those skilled in the art that thelight homogenizing system 30 may be, but not limited to, implemented as a compound eye or a Micro-lens array (M L a).
However, since different display chips have different requirements for the polarization state of the illumination light, for example, the L COS chip can only modulate the polarized light with the same polarization state, and the DMD chip can directly modulate the unpolarized light, corresponding illumination systems are required for different display chips to provide corresponding illumination light.
As shown in FIG. 10, an example of the above-mentioned collimatedcolor combining system 10 according to the present invention is applied to theillumination system 1A, wherein theillumination system 1A is capable of providing L COS chips 2A with polarized light (e.g., S-polarized light) having the same polarization state, specifically, as shown in FIG. 10, theillumination system 1A comprises a collimatedcolor combining system 10, arelay system 20A, andodging system 30 and apolarization multiplexing system 40. the collimatedcolor combining system 10 is configured to provide combinedcolor light 1104 propagating along a predetermined light path, thedodging system 30 is disposed on the predetermined light path of the collimatedcolor combining system 10, and thedodging system 30 is disposed between the collimatedcolor combining system 10 and therelay system 20A for homogenizing the combined color light from the collimatedcolor combining system 10. thepolarization multiplexing system 40 is disposed on the predetermined light path of the collimatedcolor combining system 10, thepolarization multiplexing system 40 is disposed between the dodgingsystem 30 and therelay system 20A for converting the combined color light into polarized light P + S-polarized light, the combinedcolor light 1104 is used for converting the combined color information into image information, which can be clearly expressed by the polarizedlight modulating system 2, the polarized light P + S-polarizedlight 1104 is used for interpreting the collimated light S-polarized light transmitted by theillumination system 2, theillumination system 2A and the polarized light for interpreting the polarizedlight emitting chip 2, the image information carried by theillumination system 2, and theillumination system 2, theillumination system 2A, the illumination system 3 is capable of carrying theillumination system 2, and theillumination system 2 for interpreting the image information carrying the.
Of course, in other examples of the present invention, thepolarization multiplexing system 40 may also convert the homogenized color mixture light 1104 into P-polarized light, and accordingly, theL COS chip 2A can modulate the P-polarized light into S-polarized light carrying image information, which is not described in detail herein.
As shown in fig. 11, another example of the above-mentioned collimatedcolor combining system 10 according to the present invention is applied to theillumination system 1B, wherein theillumination system 1B is capable of providing unpolarized light to theDMD chip 2B. Specifically, as shown in fig. 11, theillumination system 1B includes acolor collimating system 10, arelay system 20B, and alight homogenizing system 30. The collimatedcolor combining system 10 is configured to provide a combinedcolor light 1104 that travels along a predetermined light path. Thedodging system 30 is disposed on the predetermined optical path of the collimatedcolor combining system 10, and thedodging system 30 is disposed between the collimatedcolor combining system 10 and therelay system 20B for homogenizing the combined color light 1104 from the collimatedcolor combining system 10. Therelay system 20B is disposed on the predetermined optical path of the collimating and color-combiningsystem 10, and is configured to transmit the color-combined light 1104 from thedodging system 30 to theDMD chip 2B, so as to modulate the color-combined light 1104 into unpolarized light carrying image information through theDMD chip 2B.
It is to be noted that although fig. 10 and 11 and the corresponding description illustrate the features and advantages of the color collimating and combiningsystem 10 of the present invention by taking the specific structure of theillumination systems illumination systems system 10 can be implemented as any other existing structure, as long as the corresponding illumination purpose is satisfied, and the present invention is not described herein again.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (16)
1. A collimated color combining system, comprising:
the primary color light-emitting unit is provided with a light-emitting path and is used for emitting a first primary color light, a second primary color light and a third primary color light along the light-emitting path;
a collimating unit disposed in the light emitting path of the primary light emitting unit for collimating the first, second and third primary lights from the primary light emitting unit; and
a color combination unit, wherein the color combination unit is disposed in the light emitting path of the primary color light emitting unit, and the color combination unit comprises:
a substrate assembly, wherein the substrate assembly is disposed on the light emitting path of the primary color light emitting unit, and sequentially disposed with a first functional surface, a second functional surface and a third functional surface along the light emitting path, wherein the first, second and third functional surfaces of the substrate assembly and the light emitting path respectively have a first, second and third predetermined included angles therebetween, and the first, second and third predetermined included angles are sequentially smaller;
a first film layer, wherein the first film layer is disposed on the first functional surface of the base assembly, and is used for transmitting the second and third primary lights emitted by the primary light emitting units and reflecting the first primary light emitted by the primary light emitting units, so that the first primary light propagates along a predetermined light path;
a second film layer, disposed on the second functional surface of the base assembly, for transmitting the third primary color light transmitted through the first film layer and reflecting the second primary color light transmitted through the first film layer, so that the second primary color light propagates along the predetermined light path after passing through the first film layer; and
a third film layer, wherein the third film layer is disposed on the third functional surface of the base assembly, and is configured to reflect a third primary color light transmitted through the second film layer, so that the third primary color light propagates along the predetermined optical path after passing through the second and first film layers, and thus the first, second, and third primary colors reflected by the first, second, and third film layers respectively are combined into a combined color light propagating along the predetermined optical path.
2. The collimating color combining system of claim 1, wherein the base assembly comprises a wedge prism and a substrate, wherein the top surface of the wedge prism is the first functional surface and the bottom surface of the wedge prism is the second functional surface, wherein the substrate is located on the bottom side of the wedge prism and the side surface of the substrate adjacent to the wedge prism is the third functional surface.
3. The collimating and color-combining system of claim 1, wherein the base assembly comprises a wedge prism and a substrate, wherein the substrate is located on a top side of the wedge prism and a side of the substrate remote from the wedge prism is the first functional surface, wherein a top surface of the wedge prism is the second functional surface and a bottom surface of the wedge prism is the third functional surface, wherein the substrate is made of a transparent material.
4. The collimated color combining system of any one of claims 1 to 3, wherein the first, second and third primary colors of light emitted by the primary color light emitting units are sequentially red, green and blue.
5. The collimated color combining system of claim 4, wherein the first film layer is a red light reflecting film for reflecting red light and transmitting green and blue light.
6. The collimated color combining system of claim 5, wherein the second film layer is a green light reflecting film for reflecting green light and transmitting red and blue light.
7. The collimated color combining system of claim 5, wherein the second film layer is a blue light transmitting film for transmitting blue light and reflecting red and green light.
8. The collimated color combining system of claim 6, wherein the third film layer is a blue reflective film for reflecting blue light and transmitting red and green light.
9. The collimated color combining system of claim 7, wherein the third film layer is a blue reflective film for reflecting blue light and transmitting red and green light.
10. The collimated color combining system of claim 6, wherein the third film layer is a total reflection film for totally reflecting the red, green, and blue light.
11. The collimated color combining system of claim 7, wherein the third film layer is a total reflection film for totally reflecting red, green, and blue light.
12. The collimating and color-combining system of any of claims 1 to 3, wherein the first predetermined included angle ranges from 47 ° to 57 °; wherein the second predetermined included angle is in the range of 43-53 °; wherein the third predetermined included angle is in the range of 36 ° to 46 °.
13. The collimated color combining system of any one of claims 1 to 3, wherein the primary color light emitting unit comprises at least one red light emitting module, at least one green light emitting module and at least one blue light emitting module, wherein the red light emitting module, the green light emitting module and the blue light emitting module are packaged into the primary color light emitting unit by a three-in-one packaging method for emitting red light, green light and blue light, respectively, toward the first film layer of the color combining unit.
14. An illumination system for providing illumination to a display unit, comprising:
the collimated color combining system of any one of claims 1 to 13, for providing a combined color light propagating along a predetermined optical path of the collimated color combining system; and
and the relay system is arranged on the preset optical path of the collimation color combination system and is used for transmitting the color combination light from the collimation color combination system to the display unit so as to modulate the color combination light into light carrying image information through the display unit.
15. The illumination system of claim 14, further comprising an integrator system, wherein said integrator system is disposed between said collimated color combining system and said relay system and in the predetermined optical path of said collimated color combining system for homogenizing the combined color light from said collimated color combining system.
16. The illumination system of claim 15, further comprising a polarization multiplexing system, wherein the polarization multiplexing system is disposed between the dodging system and the relay system, and is configured to convert the combined color light homogenized by the dodging system into polarized light having the same polarization state, wherein the relay system is further configured to transmit the polarized light to the display unit, so as to modulate the polarized light into polarized light carrying image information through the display unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910025868.XACN111435198A (en) | 2019-01-11 | 2019-01-11 | Collimation color combination system and lighting system |
| PCT/CN2019/123464WO2020143371A1 (en) | 2019-01-11 | 2019-12-06 | Collimation and color combination system, lighting system, and micro projection light engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910025868.XACN111435198A (en) | 2019-01-11 | 2019-01-11 | Collimation color combination system and lighting system |
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| CN201910025868.XAPendingCN111435198A (en) | 2019-01-11 | 2019-01-11 | Collimation color combination system and lighting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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