CN111435198A

CN111435198A - Collimation color combination system and lighting system

Info

Publication number: CN111435198A
Application number: CN201910025868.XA
Authority: CN
Inventors: 郝希应; 陈杭; 郑光; 陈远; 胡增新
Original assignee: Sunny Optical Zhejiang Research Institute Co Ltd
Current assignee: Sunny Optical Zhejiang Research Institute Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2020-07-21

Abstract

A collimated color combining system and an illumination system. The collimation color combination system comprises a primary color light-emitting unit, a collimation unit and a color combination unit. The color combination unit comprises a first film layer, a second film layer, a third film layer and a base body assembly. The substrate assembly is arranged on a light emitting path of the primary color light emitting unit, and is sequentially provided with a first functional surface, a second functional surface and a third functional surface, wherein included angles between the first functional surface and the light emitting path are sequentially reduced. The first film layer is arranged on the first functional surface and is used for transmitting the second and third primary colors of light from the primary color light-emitting unit and reflecting the first primary colors of light from the primary color light-emitting unit. The second film layer is arranged on the second functional surface and used for transmitting the third primary color light and reflecting the second primary color light. The third film layer is disposed on the third functional surface and is configured to reflect the third primary color light, so that the reflected first, second, and third primary color lights are combined into a combined color light propagating along a predetermined optical path.

Description

Collimation color combination system and lighting system

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-combining system 10 includes a primary light-emitting unit 11, a color-combining unit 12, and a collimating unit 13. The primary light emitting unit 11 has a light emitting path 110 for emitting a first primary light 1101, a second primary light 1102 and a third primary light 1103 along the light emitting path 110. The collimating unit 13 is disposed in the light emitting path 110 of the primary light emitting unit 11 for collimating the first, second and third

primary light

1101, 1102, 1103 emitted via the primary light emitting unit 11. The color combination unit 12 is disposed in the light emitting path 110 of the primary color light emitting unit 11, and the collimating unit 13 is disposed between the primary color light emitting unit 11 and the color combination unit 12, wherein the color combination unit 12 is configured to combine the first, second, and third

primary color lights

1101, 1102, 1103 collimated by the collimating unit 13 into a combined color light 1104, thereby ensuring that the lighting system equipped with the collimated color 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, the color combining unit 12 includes a first film 121, a second film 122, a third film 123, and a base member 124. The substrate assembly 124 is disposed on the light-emitting path 110 of the primary light-emitting unit 11, and a first functional surface 12401, a second functional surface 12402 and a third functional surface 12403 are sequentially disposed along the light-emitting path 110 of the primary light-emitting unit 11, wherein a first, a second and a third predetermined included angles θ are respectively formed between the first, the second and the third

functional surfaces

12401, 12402 and 12403 of the substrate assembly 124 and the light-emitting path 110 of the primary light-emitting unit 11₁、θ₂、θ₃And the first, second and third predetermined angles θ₁、θ₂、θ₃And become smaller in turn.

Accordingly, the first film 121 is disposed on the first functional surface 12401 of the substrate assembly 124 for transmitting the second and third

primary lights

1102, 1103 emitted by the primary light-emitting unit 11 and reflecting the first primary light 1101 emitted by the primary light-emitting unit 11, so that the first primary light 1101 travels along a predetermined light path 100. The second film 122 is disposed on the second functional surface 12402 of the base member 124, and is configured to transmit the third primary color light 1103 transmitted through the first film 121 and reflect the second primary color light 1102 transmitted through the first film 121, so that the second primary color light 1102 propagates along the predetermined light path 100 after passing through the first film 121. The third film layer 123 is disposed on the third functional surface 12403 of the base member 124, and is configured to reflect the third primary color light 1103 transmitted through the second film layer 122, so that the third primary color light 1103 propagates along the predetermined light path 100 after passing through the second and first film layers 122, 121, and thus the first, second, and third

primary color lights

1101, 1102, 1103 respectively reflected by the first, second, and third film layers 121, 122, 123 are combined into the combined color light 1104 propagating along the predetermined light path 100. It is understood that the predetermined light path 100 is designed according to the structure of the collimating and color-combining system 10, and the predetermined light path 100 is not parallel to the light-emitting path 110 of the primary light-emitting unit 11, which is not described in detail herein.

Illustratively, as shown in fig. 2, the first, second, and third

primary colors

1101, 1102, 1103 may be implemented, but not limited to, red light, green light, and blue light in sequence; accordingly, the first film layer 121 is implemented as a red light reflecting film 1211, wherein the red light reflecting film 1211 is used for reflecting red light and transmitting green light and blue light, for example, the reflection spectrum of the red light reflecting film 1211 can be shown as the thick solid line portion in fig. 3; the second film layer 122 is implemented as a blue light-transmitting film 1221, wherein the blue light-transmitting film 1221 is used for transmitting blue light and reflecting red light and green light, for example, the reflection spectrum of the blue light-transmitting film 1221 can be shown as a thick solid line portion in fig. 4; the third film 123 is implemented as a total 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 red light 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 red light 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-transmitting film 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-transmitting film 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 third

primary colors

1101, 1102, 1103 can also be implemented as blue light, green light and red light in sequence; or may be implemented as red, blue, green, etc. in sequence. In other words, the first, second and third

primary colors

1101, 1102 and 1103 are respectively selected from one of red light, blue light and green light, and the first, second and third

primary colors

1101, 1102 and 1103 are different from each other. It is understood that when the sequence of the red light, the blue light and the green light corresponding to the first, the second and the third

primary color light

1101, 1102 and 1103 is changed, the corresponding reflective characteristics of the first, the second and the third film layers 121, 122 and 123 will be changed accordingly, as long as the purpose of the present invention is satisfied, and the present invention will not be described in detail herein.

Preferably, as shown in FIG. 1, in this embodiment of the present invention, the first predetermined included angle θ between the first functional surface 12401 of the substrate assembly 124 and the light-emitting path 110 of the primary light-emitting unit 11₁Theta is more than or equal to 47 degrees₁Less than or equal to 57 degrees; the second predetermined included angle θ between the second functional surface 12402 and the predetermined light path 100 of the collimated color 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 third functional surface 12403 and the predetermined light path 100 of the collimated color combining system 10₃Theta is more than or equal to 36 degrees₃Less than or equal to 46 degrees. In other words, the included angle between the first film layer 121 and the predetermined light path 100 of the collimated color combining system 10 can be, but is not limited to, 47 ° to 57 °; the angle between the second film layer 122 and the predetermined light path 100 of the collimated color combining system 10 can be, but is not limited to, 43-53 °; the angle between the third film layer 123 and the predetermined light path 100 of the collimated color 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 third

functional surfaces

12401, 12402, 12403 of the 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 third

functional surfaces

12401, 12402, 12403 of the 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, the base assembly 124 of the color combination unit 12 may include a wedge prism 1241 and a base plate 1242, wherein the wedge prism 1241 is located between the base plate 1242 and the primary color light emitting unit 11, that is, the base plate 1242 is located on a side of the wedge prism 1241 away from the primary color light emitting unit 11, that is, the base plate 1242 is located on a bottom side of the wedge prism 1241. The top side of the wedge-shaped prism 1241 is embodied as the first functional side 12401, and the bottom side of the wedge-shaped prism 1242 is embodied as the second functional side 12402; the side of the base plate 1242 adjacent to the wedge prism 1241 is embodied as the third functional surface 12403. In addition, since the second and third

primary colors

1102 and 1103 need not be transmitted through the wedge prism 1241 but the substrate 1242, the wedge prism 1241 may be made of a transparent material, and the substrate 1242 may be made of a transparent, translucent, or opaque material. In addition, the substrate 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 the functional surface 12401, which is not described in detail herein.

It should be noted that, just as the wedge-shaped prism 1241 and the base plate 1242 included in the base assembly 124 of the color 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 and color combination system 10 are reduced, the collimating and color 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 color light emitting unit 11 of the collimated and color-combined system 10 includes at least one red light emitting module 111, at least one green light emitting module 112, and at least one blue light emitting module 113, wherein the red, green, and blue

light emitting modules

111, 112, and 113 are located on the same side of the color-combining unit 12, and are configured to emit red light, green light, and blue light along the light emitting path 110 of the primary color light emitting unit 11, so that the emitted red light, green light, and blue light first pass through the collimation unit 13 and then pass through the color-combining unit 12 to combine the collimated red light, green light, and blue light into the combined color light 1104 propagating along the predetermined light path 100.

It is noted that in this embodiment of the invention, the red, green and blue

light emitting modules

111, 112, 113 may be implemented, but are not limited to, as L ED light sources of respective colors.

Preferably, the primary color light emitting unit 11 can be manufactured by three-in-one packaging of the red, green and blue

light emitting modules

111, 112, 113 to reduce the volume of the primary color light reflecting unit 11, and thus the volume of the collimated color combining system 10.

Exemplarily, as shown in fig. 2, the three light emitting modules in the primary light emitting unit 11 are the red light emitting module, the green light emitting module, and the blue

light emitting module

111, 112, 113 in sequence along the direction of the predetermined 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 blue

light emitting module

111, 112, 113 are collimated by the collimating unit 13, and then cross each other before reaching the first film layer 121 of the color combining unit 12, so that the three primary lights irradiated onto the first film layer 121 are the blue light, the green light, and the red light in sequence along the direction of the predetermined light path 100. It is understood that in this embodiment of the present invention, the first, second and third

primary color lights

1101, 1102, 1103 are implemented as red light, green light and blue light in sequence.

It should be noted that, due to the existence of the collimating unit 13, although the first, second and third

primary lights

1101, 1102 and 1103 emitted by the primary light emitting unit 11 are parallel to each other, after being collimated by the collimating unit 13, the first and third

primary lights

1101 and 1103 will be biased to pass through the second primary light 1102 so as to cross each other before reaching the first film 121, which helps to reduce the gap between the three

primary lights

1101, 1102 and 1103, thereby reducing the required volume of the collimated color combining system 10, and further reducing the volume of the lighting system. It will be understood by those skilled in the art that the collimating 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-combining system 10 according to the above-mentioned embodiment of the present invention, wherein the substrate 1242 of the base assembly 124 of the color-combining unit 12 of the collimating and color-combining system 10 is located between the wedge-shaped prism 1241 and the primary color light-emitting unit 11, that is, the substrate 1242 is located on the side of the wedge-shaped prism 1241 adjacent to the primary color light-reflecting unit 11, that is, the substrate 1242 is located on the top side of the wedge-shaped prism 1241.

Specifically, as shown in fig. 5, the side of the base plate 1242 of the base assembly 124 that is away from the wedge prism 1241 is implemented as the first functional surface 12401; while the top side of the wedge-shaped prism 1241 of the base module 124 is embodied as the second functional side 12402 and the bottom side of the wedge-shaped prism 1242 is embodied as the third functional side 12403. Thus, when the first, second and third film layers 121, 122, 123 are sequentially disposed on the first, second and third

functional surfaces

12401, 12402, 12403 of the base assembly 124, the color 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 third

primary color lights

1102 and 1103 need to transmit through the substrate 1242 and the third primary color light 1103 needs to transmit through the wedge prism 1241, both the wedge prism 1241 and the substrate 1242 need to be made of transparent materials.

Of course, in another example of the present invention, the base assembly 124 of the color combining unit 12 may also implement the side of the substrate 1242 adjacent to the wedge-shaped prism 1241 as the first functional surface 12401, and the first film layer 121 is disposed on the first functional surface 12401, so that the first primary color light 1101 is reflected by the first film layer 121 after passing through the substrate 1242. It is understood that the base member 124 can be implemented as other types of members as long as the first, second and third

functional surfaces

12401, 12402, 12403 can be provided as required, and the present invention will not be described in detail herein.

Fig. 6 shows a second variant implementation of the collimated color combining system 10 according to the above embodiment of the invention, wherein the first film layer 121 of the color combining unit 12 of the collimated color combining system 10 is implemented as a red light reflecting film 1211, wherein the red light reflecting film 1211 is used for reflecting red light and transmitting green light and blue light; the second film layer 122 is implemented as a green light reflecting film 1222, wherein the green light reflecting film 1222 is for reflecting green light and transmitting red and blue light; the third film 123 is implemented as a total reflection film 1231 for totally reflecting the red light, the green light, and the blue light, so that the color combining unit 12 can also achieve a desired color combining effect.

Fig. 7 shows a third variant implementation of the collimated color combining system 10 according to the above embodiment of the invention, wherein the first film layer 121 of the color combining unit 12 of the collimated color combining system 10 is implemented as a red light reflecting film 1211, wherein the red light reflecting film 1211 is used for reflecting red light and transmitting green light and blue light; the second film layer 122 is implemented as a blue light-transmitting film 1221, wherein the blue light-transmitting film 1221 is for transmitting blue light and reflecting red and green light; the third film layer 123 is implemented as a blue light reflecting film 1232 for reflecting blue light and transmitting red and green light, so that the color combining unit 12 can also achieve a desired color combining effect.

Fig. 8 shows a fourth variant implementation of the collimated color combining system 10 according to the above embodiment of the invention, wherein the first film layer 121 of the color combining unit 12 of the collimated color combining system 10 is implemented as a red light reflecting film 1211 for reflecting red light and transmitting green and blue light; the second film layer 122 is implemented as the green light reflecting film 1222 to reflect green light and transmit red and blue light; the third film layer 123 is implemented as the blue light reflecting film 1232 for reflecting blue light and transmitting red and green light, so that the color 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 an illumination system 1 configured with the above-mentioned collimated color combining system 10, for providing illumination light to a display unit 2 to modulate the illumination light into corresponding image light through the display unit 2. Specifically, as shown in fig. 9, the illumination system 1 includes the above-mentioned collimated color combining system 10 and a relay system 20. The collimated color combining system 10 is configured to provide a combined color light propagating along a predetermined optical path of the collimated color combining system 10. The relay system 20 is disposed on the predetermined optical path of the collimated and color-combined system 10, and is configured to transmit the color-combined light from the collimated and color-combined system 10 to the display unit 2, so as to modulate the color-combined light into light carrying image information through the display unit 2. It is understood that the relay system 20 may be implemented as any type of relay system as long as it can ensure that the relay system 20 can transmit the combined color light from the illumination system 1 to the display unit 2 and be modulated by the display unit 2 into light carrying image information, and the invention is not further limited thereto.

Further, as shown in fig. 9, the illumination system 1 may further include a light homogenizing system 30, wherein the light homogenizing system 30 is disposed between the collimating and color-combining system 10 and the relay system 20 for homogenizing the color light combined from the collimating and color-combining system 10, it is understood by those skilled in the art that the light 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 collimated color combining system 10 according to the present invention is applied to the illumination system 1A, wherein the illumination 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, the illumination system 1A comprises a collimated color combining system 10, a relay system 20A, an dodging system 30 and a polarization multiplexing system 40. the collimated color combining system 10 is configured to provide combined color light 1104 propagating along a predetermined light path, the dodging system 30 is disposed on the predetermined light path of the collimated color combining system 10, and the dodging system 30 is disposed between the collimated color combining system 10 and the relay system 20A for homogenizing the combined color light from the collimated color combining system 10. the polarization multiplexing system 40 is disposed on the predetermined light path of the collimated color combining system 10, the polarization multiplexing system 40 is disposed between the dodging system 30 and the relay system 20A for converting the combined color light into polarized light P + S-polarized light, the combined color light 1104 is used for converting the combined color information into image information, which can be clearly expressed by the polarized light modulating system 2, the polarized light P + S-polarized light 1104 is used for interpreting the collimated light S-polarized light transmitted by the illumination system 2, the illumination system 2A and the polarized light for interpreting the polarized light emitting chip 2, the image information carried by the illumination system 2, and the illumination system 2, the illumination system 2A, the illumination system 3 is capable of carrying the illumination system 2, and the illumination system 2 for interpreting the image information carrying the.

Of course, in other examples of the present invention, the polarization multiplexing system 40 may also convert the homogenized color mixture light 1104 into P-polarized light, and accordingly, the L 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 collimated color combining system 10 according to the present invention is applied to the illumination system 1B, wherein the illumination system 1B is capable of providing unpolarized light to the DMD chip 2B. Specifically, as shown in fig. 11, the illumination system 1B includes a color collimating system 10, a relay system 20B, and a light homogenizing system 30. The collimated color combining system 10 is configured to provide a combined color light 1104 that travels along a predetermined light path. The dodging system 30 is disposed on the predetermined optical path of the collimated color combining system 10, and the dodging system 30 is disposed between the collimated color combining system 10 and the relay system 20B for homogenizing the combined color light 1104 from the collimated color combining system 10. The relay system 20B is disposed on the predetermined optical path of the collimating and color-combining system 10, and is configured to transmit the color-combined light 1104 from the dodging system 30 to the DMD chip 2B, so as to modulate the color-combined light 1104 into unpolarized light carrying image information through the DMD 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 combining system 10 of the present invention by taking the specific structure of the

illumination systems

1A and 1B as an example, those skilled in the art can understand that fig. 10 and 11 and the corresponding description disclose the

illumination systems

1A and 1B as examples only, which do not constitute a limitation to the content and scope of the present invention, for example, in other examples of the present invention, the structure of other parts of the illumination system besides the color collimating and combining 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

1. A collimated color combining system, comprising:

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

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.