WO2017084285A1 - 一种光束合光***及其投影装置 - Google Patents

一种光束合光***及其投影装置 Download PDF

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Publication number
WO2017084285A1
WO2017084285A1 PCT/CN2016/083256 CN2016083256W WO2017084285A1 WO 2017084285 A1 WO2017084285 A1 WO 2017084285A1 CN 2016083256 W CN2016083256 W CN 2016083256W WO 2017084285 A1 WO2017084285 A1 WO 2017084285A1
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Prior art keywords
light
combining
reflecting surface
color led
light beam
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PCT/CN2016/083256
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English (en)
French (fr)
Inventor
高志强
赵远
杨伟樑
林清云
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广景视睿科技（深圳）有限公司
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Publication of WO2017084285A1 publication Critical patent/WO2017084285A1/zh

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    • 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
    • G03B21/2033—LED or laser light sources
    • 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
    • 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
    • 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
    • G03B21/2066—Reflectors in illumination beam

Definitions

  • the present invention relates to the field of digital projection display technology, and more particularly to a beam combining system and a projection apparatus therefor.
  • portable electronic devices With the development of science and technology, especially the promotion of semiconductor technology, portable electronic devices are constantly being designed and manufactured.
  • the enhancement of the functions of portable electronic devices has made users' requirements for display devices of human-machine interfaces more and more oriented toward micro, large screen and high resolution.
  • projector technology has developed rapidly in recent years.
  • DLP, LCOS and other products have launched portable projectors with high performance, small size and light weight.
  • the function of the illumination module of the projection module in the projector is to convert as much as possible the large-angle distribution of the light beam, the illumination light of different shapes and brightness, into a uniform spot that is irradiated to the effective area of the display chip, thereby achieving uniformity.
  • Bright projection display For better application of the projection module, the user should have better visual enjoyment. Under the premise of keeping the projection optical path design simple and efficient, satisfying small size and low optical loss, the illumination intensity is enhanced to make the light output high. Under the premise, this also becomes one of the technical problems to be solved by those skilled in the art.
  • a group of three primary light sources are first combined to form a parallel beam, and then the beam direction is changed by a reflecting mirror to cause the beam to be incident on the display chip.
  • the projection is improved.
  • the performance of the machine the study uses two sets of three primary color light sources as the light source device, if the above-mentioned reflective lens and other devices are also used to change the two sets of three primary color light sources
  • the beam direction causes the light beam to be incident on the display chip, and the optical path is large, which is disadvantageous for reducing the volume and weight of the projector.
  • an object of the present invention is to provide a beam combining system and a projection apparatus which are simple and reasonable in structure, compact in layout, and combine light beams to enhance light intensity by using a light combining device;
  • the projection performance of the device is greatly improved.
  • the present invention provides a beam combining system comprising: a first beam and a second beam having different incident directions; and reflecting the first beam and the second beam and causing the reflected beam to be along the same a light-converging device for directional propagation; wherein the light combining device includes: a first reflecting surface that reflects the first light beam, and a second reflecting surface that reflects the second light beam.
  • the first reflective surface and the second reflective surface are plated with a metal reflective film or a high reflective film system composed of a multilayer dielectric film.
  • the first light beam may be a monochromatic LED light beam or a co-directional two-color LED light beam or an isotropic three-color LED light beam; the second light beam may also be a single-color LED light beam or the same direction. Two-color LED beam or the same three-color LED beam, can be set according to actual needs
  • the light combining device comprises a toothed structure
  • the toothed structure comprises two or more reflective surfaces
  • the first reflective surface and the second reflective surface are respectively disposed on the toothed structure.
  • the angle between the first reflecting surface and the second reflecting surface is an obtuse angle.
  • the light combining device comprises a first reflecting surface and a second reflecting surface
  • the tooth structure comprises two adjacent reflecting surfaces
  • the first reflecting surface and the second reflecting The faces are respectively disposed on two adjacent reflecting surfaces of the tooth structure.
  • the toothed structure may comprise a triangular prism or be arranged as a part of a triangular prism, or consist of two or more reflective lenses with an obtuse angle.
  • the light combining device includes a plurality of first reflecting surfaces and a plurality of second reflecting surfaces
  • the toothed structure includes a plurality of adjacent reflecting surfaces, and the plurality of first reflecting surfaces And a plurality of second reflecting surfaces are respectively disposed on adjacent reflecting surfaces of the tooth structure.
  • the number of reflective surfaces of the toothed structure can be set according to the size of the incident beam, and the incident beam can be totally reflected, and the reflection effect is good.
  • the present invention also provides a projection apparatus comprising: a first light source device for generating a first light beam; a second light source device for generating a second light beam; the light combining system described above; a light beam A shaping guiding device for shaping and guiding a light beam from the light combining system to a display chip; a display chip; and a projection lens.
  • the first light source device and the second light source device both use a dichroic beam splitting lens group to combine light beams generated by the three color LED light sources to generate first and second light beams in different directions.
  • the first beam and the second beam are both three-color LED beams in the same direction.
  • the projection device may have one or more light combining systems; the first light source device and the second light source device may also include one or more light combining systems, and the light combining system is used to The color LED beam or the two-color LED beam of the same direction is combined.
  • the display chip is a DMD or an LCOS or an LCD.
  • the present invention provides a beam combining light system and a projection apparatus thereof, the beam combining light system comprising: a first light beam and a second light beam having different incident directions; And reflecting the first beam and the second beam and causing the reflected beam a light combining device that propagates in the same direction;
  • the light combining device includes: a first reflecting surface that reflects the first light beam, and a second reflecting surface that reflects the second light beam;
  • the beam combining light system adopts a tooth shape
  • the optical device combines two beams from different incident directions to converge the two beams into beams in the same direction, which greatly enhances the light intensity of the beam, thereby improving the use of the size and weight to meet the conditions.
  • the performance of the projector of the light combining system can provide users with better visual enjoyment.
  • FIG. 1 is a schematic structural view of a first embodiment of a beam combining system of the present invention
  • Figure 2 is a schematic cross-sectional view showing a sawtooth lens in a first embodiment of the beam combining system of the present invention
  • FIG. 3 is a schematic structural view of a second embodiment of the beam combining system of the present invention.
  • FIG. 4 is a schematic structural view of a first embodiment of a projection apparatus of the present invention.
  • Figure 5 is a schematic structural view of a second embodiment of the projection apparatus of the present invention.
  • Fig. 6 is a partial structural schematic view showing a second embodiment of the projection apparatus of the present invention.
  • FIG. 1 is a schematic structural view of a first embodiment of a beam combining system of the present invention
  • FIG. 2 is a schematic cross-sectional view of a light combining device in a first embodiment of the beam combining system of the present invention, and this embodiment
  • the light combining device is a sawtooth lens. As shown in FIG. 1 and FIG.
  • a beam combining system includes: a first light beam 11 having different incident directions and The second light beam 12 and the light combining device 13; wherein, the light combining device 13 includes: a first reflecting surface S1 and a second reflecting surface S2, the first reflecting surface S1 reflects the first light beam 11, and the second reflecting surface S2 The second beam 12 is reflected, and after being reflected, the first beam 11 and the second beam 12 can be combined to form a beam propagating in the same direction.
  • the light combining device 13 includes: a plurality of first reflective surfaces S1 and a plurality of second reflective surfaces S2, the toothed structure includes a plurality of adjacent reflective surfaces, the plurality of first The reflecting surface S1 and the plurality of second reflecting surfaces S2 are respectively disposed on adjacent reflecting surfaces of the tooth structure.
  • the light combining device 13 is a zigzag lens including a tooth structure
  • the tooth structure is provided with two first reflecting surfaces S1 and two second reflecting surfaces S2
  • the zigzag lens has a bottom surface L (the dotted line in FIG. 2) L' is parallel to the bottom surface L)
  • the bottom surface L of the zigzag lens is orthogonally disposed with the light beam reflected by the reflecting surface
  • the first reflecting surface S1 and the second reflecting surface S2 are respectively spaced apart from each other on the adjacent surface of the tooth structure.
  • the angle between the first reflecting surface and the second reflecting surface is an obtuse angle.
  • the zigzag lens may be composed of two or more triangular prisms, two or more triangular prisms may be adjacent to each other or not in contact with each other; or a plurality of reflective lenses having an obtuse angle, the multiple angles being
  • the obtuse-angle reflective mirrors may be adjacent to each other or not adjacent to each other.
  • the structure of the toothed structure may be symmetrical or asymmetrical; preferably, the structure of the toothed structure is symmetrical. It is of course possible to set the angle between adjacent faces of the toothed structure to different angles as desired.
  • the toothed structure may be a unitary structure having a plurality of reflecting surfaces, or a part of two or more adjacent toothed structures may be used to join together a completed toothed structure, two adjacent toothed shapes. A portion of the structure may or may not be adjacent to each other.
  • the number of the first reflecting surface S1 and the second reflecting surface S2 of the tooth structure is determined by the incident beam size, and it is necessary to ensure that the sawtooth lens can completely receive the incident beam; the first reflecting surface S1 can be selected according to the required And the number of the second reflecting surfaces S2 is set to the number of reflecting surfaces of the toothed structure, and a partial tooth structure including only one first reflecting surface S1 or only a partial tooth including the second reflecting surface S2 may be provided as needed.
  • Shape structure The number of the first reflecting surface S1 and the second reflecting surface S2 provided on the tooth structure may be the same or different, and the angles may be the same or different. The number and angle are adjusted according to the actual incident beam.
  • the second reflecting surface S2 may or may not be adjacent to each other.
  • the first reflective surface S1 and the second reflective surface S2 may be alternately disposed on adjacent reflective surfaces of the toothed structure, or two or more first reflective surfaces S1 may be simultaneously disposed at adjacent positions, and two The one or more second reflecting surfaces S2 are disposed at adjacent positions, etc., and are set according to actual conditions.
  • the angle ⁇ between the first reflecting surface S1 and the second reflecting surface S2 is an obtuse angle, which ensures that the first reflecting surface S1 and the second reflecting surface S2 reflect the first beam 11 and the second beam 12 more effectively;
  • the first reflecting surface S1 and the second reflecting surface S2 are plated with a metal reflective film or a high-reflecting film system composed of a multilayer dielectric film; setting the angle ⁇ to an obtuse angle also makes the processing of the reflective film or the reflective coating easier. Uniformity, thereby ensuring the reflective properties of the first reflective surface S1 and the second reflective surface S2.
  • the first light beam 11 and the second light beam 12 may each be a single-color LED light beam or a two-color LED light beam or a three-color LED light beam in the same direction; the first light beam 11 and the second light beam 12 may be
  • the parallel beams may also be non-parallel beams; however, after the light combining device 13 is combined, a parallel beam of light may be incident on other devices, which greatly enhances the light intensity of the beam.
  • the angle between the first reflective surface S1 and the second reflective surface S2 and the bottom surface L of the zigzag lens is an angle ⁇ and an angle ⁇ , respectively, and the angles of the angle ⁇ and the angle ⁇ may be equal or not equal;
  • the angle between the incident direction of a light beam 11 and the bottom surface L of the zigzag lens is negatively correlated with the angle ⁇ , that is, the angle ⁇ increases, and the angle between the incident direction of the first light beam 11 and the bottom surface L of the zigzag lens becomes smaller; similarly, the first The angle between the incident direction of the two beams 12 and the bottom surface L of the zigzag lens is inversely related to the angle ⁇ , that is, the angle ⁇ is decreased, and the angle between the incident direction of the second beam 12 and the bottom surface L of the zigzag lens becomes larger.
  • the second embodiment differs mainly in that: the light combining device includes: a first a reflective surface S3 and a second reflective surface S4, the toothed structure 33 includes two adjacent reflective surfaces, and the first reflective surface S3 and the second reflective surface S4 are respectively disposed on two of the toothed structures 33 On the adjacent surface, the first reflecting surface S3 reflects the first light beam 31, and the second reflecting surface S4 reflects the second light beam 32.
  • the toothed structure 33 may be a unitary structure having two reflecting surfaces, or a part of two adjacent toothed structures may be used instead of a completed toothed structure, two adjacent teeth A part of the shaped structure may or may not be adjacent to each other, wherein a part of one of the toothed structures is provided with a first reflecting surface S3, and a part of the other toothed structure is provided with a second reflecting surface S4.
  • the tooth structure 33 may be a triangular prism having a first reflective surface S3 and a second reflective surface S4 or two reflective lenses having an obtuse angle; the same as the first embodiment,
  • the first reflecting surface S3 and the second reflecting surface S4 are plated with a metal reflective film or a high-reflecting film system composed of a multilayer dielectric film; the angle ⁇ is set to an obtuse angle.
  • the first light beam 31 may be a monochromatic LED beam or a co-directional two-color LED beam or a co-directional three-color LED beam;
  • the second beam 32 may be a monochromatic LED beam or a co-directional bi-color LED. a beam or a three-color LED beam of the same direction;
  • the first beam 31 and the second beam 32 may be parallel beams or non-parallel beams; but after combining the single tooth structure 33, a parallel beam may be incident on the other beam.
  • the device greatly enhances the light intensity of the beam.
  • FIG. 4 is a schematic structural view of a first embodiment of a projection apparatus according to the present invention.
  • a specific structure of a projection apparatus according to an embodiment of the present invention includes: a first light source device 41 for generating a first light beam; a second light source device 42 for generating a second light beam; a light combining system 43 according to the first embodiment; a light beam guiding device 44 for shaping and guiding the light beam from the light combining system to the display chip; 45; and projection lens 46.
  • the first light source device 41 is for generating a first light beam
  • the second light source device 42 is for generating a second light beam
  • the first light source device 41 and the second light source device 42 both adopt a dichroic beam splitting lens group to the three color LEDs.
  • the light beam generated by the light source is combined; after the three primary color LED light sources are collimated by the collimating lens group, the one color LED light beam is transmitted through the dichroic beam splitting lens group, and the other two color LED light beams are reflected by the dichroic beam splitting lens group and then merged into the same
  • the first beam or the second beam of light is equalized by the fly-eye lens and the relay lens, and then incident on the light combining system 43; under the action of the light combining system 43, The first beam and the second beam in the same direction converge into a beam of the same direction into the beam guiding device 44; the beam guiding device 44 is composed of a free-form prism and a right-angle prism; the beam guiding device 44 will be from the combining unit 43
  • the beam is shaped and directed to the display chip 45; when the display chip 45 is on, the projected beam enters the projection lens 46 and is projected.
  • the light incident surface of the display chip 45 is orthogonal to the bottom surface L of the zigzag lens in the light combining system 43; due to the action of the light combining system 43, the light intensity of the projected light beam is large, and the projection is greatly increased.
  • the projection performance and display effect of the device can provide users with better visual enjoyment.
  • the display chip 45 may be a DMD or an LCOS or an LCD.
  • FIG. 5 is a schematic structural view of a second embodiment of a projection apparatus of the present invention
  • FIG. 6 is a partial structural view of a second embodiment of the projection apparatus of the present invention.
  • the second embodiment is different from the first embodiment in that the angle at which the display chip 55 is placed is different from that of the first embodiment, and the angle of the beam guiding device 54 is also different.
  • the light guiding device 54 can be composed of a rectangular prism group, and the optical path between the display and the display chip 55 is as shown in FIG. 6; in this embodiment, the light incident surface of the display chip 55 is still in the light combining system 53.
  • the bottom surface L of the zigzag lens is orthogonal, but the position of the display lens 55 is different, and the light incident surface of the display chip 55 is orthogonal to the light incident surface of the display chip 45 in the first embodiment (this illustration is due to The angle problem is not shown).
  • the specific structure of the beam shaping guiding device is not limited, and the device for appropriately introducing the light beam from the light combining system into the display chip belongs to the protection scope of the present invention.
  • the structure of the projection apparatus protected by the present invention is also not limited to the above-described manner, and the projection apparatus may have one or more light combining systems, preferably 1 to 4 light combining systems; the first light source device and the second light source device are also A combined light system can be used to combine a single color LED beam or a two-color LED beam.
  • the present invention provides a beam combining system and a projection apparatus thereof, the beam combining system comprising a first beam and a second beam having different incident directions; and performing the first beam and the second beam a light combining device that reflects and causes the reflected light beam to propagate in the same direction; wherein the light combining device includes: a first reflecting surface that reflects the first light beam, and a second light beam A second reflecting surface that performs reflection.
  • the beam combining system uses a light combining device to combine two beams from different incident directions, so that the two beams are concentrated into beams in the same direction, which greatly enhances the light intensity of the beam, thereby ensuring the size and weight satisfying conditions.
  • the performance of the projection device adopting the light combining system is improved, and the user can enjoy better visual enjoyment.
  • the light combining device is not necessarily provided in a toothed structure, and may include, for example, one or more adjacently disposed trapezoidal structures, and the first reflective surface and the second reflective surface may be disposed on both sides of the trapezoidal structure; or the light combining device may be included Structures that are stepped on both sides, and so on.

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  • General Physics & Mathematics (AREA)
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Abstract

一种光束合光***，包括：入射方向不同的第一光束（11）和第二光束（12），以及对第一光束（11）和第二光束（12）进行反射并使得经反射后的光束沿同一方向传播的合光装置（13）。合光装置（13）包括：对第一光束（11）进行反射的第一反射面（S1），以及对第二光束（12）进行反射的第二反射面（S2）。这种光束合光***采用合光装置（13）对来自不同入射方向的两束光束（11，12）进行合光，使两束光束（11，12）会聚成方向相同的光束，增强了光束的光照强度。还公开了一种包括这种光束合光***的投影装置。

Description

一种光束合光***及其投影装置 技术领域
本发明涉及数字投影显示技术领域，更具体地说，涉及一种光束合光***及其投影装置。
背景技术
随着科学技术的发展，特别是半导体技术的推动，便携式的电子设备被不断的设计制造出来。便携式电子设备功能的提升，使得用户对人机界面的显示器件的要求越来越向着微型、大屏幕以及高分辨率方向发展。在广大用户强烈需求的促使下，近年来投影机技术发展迅猛，DLP、LCOS等产品纷纷推出了性能高、尺寸小且重量轻的便携式的投影机。
投影机中的投影模组照明光路的功能在于尽可能多地将光束发出的大角度分布、形状不一、亮度不等的照明光线，转换为照射到显示芯片有效区域的均匀光斑，实现均匀、明亮的投影显示画面。投影模组要得到更好地应用，带给用户更好的视觉享受，就要在保持投影光路设计简洁高效、满足尺寸小、光损耗低等前提下，增强光照强度使具有高的光输出的前提下，这也成为本领域技术人员有待解决的技术问题之一。
现有常规的投影机，通常是先将一组三基色光源进行合光会聚成平行光束后，再通过反射镜片等装置改变光束方向使光束入射到显示芯片；目前，为了增强光照强度，提高投影机的性能，研究采用两组三基色光源作为光源装置，如果还采用上述的反射镜片等装置来改变两组三基色光源光 束方向使光束入射到显示芯片，则光程较大，不利于减小投影机的体积和重量。
公开于该背景技术部分的信息仅仅旨在增加对本发明的总体背景的理解，而不应当被视为承认或以任何形式暗示该信息构成已为本领域一般技术人员所公知的现有技术。
发明内容
针对上述技术问题，本发明的目的在于提供一种结构简单合理，布局紧凑，利用合光装置对两束光束进行合光，增强光照强度的光束合光***及其投影装置；利用该光学***投影装置的投影性能得到大大的提高。
为实现上述目的，本发明提供了一种光束合光***，包括：入射方向不同的第一光束和第二光束；以及对第一光束和第二光束进行反射并使得经反射后的光束沿同一方向传播的合光装置；其中，所述合光装置包括：对第一光束进行反射的第一反射面，以及对第二光束进行反射的第二反射面。
优选地，上述技术方案中，所述第一反射面和第二反射面镀有金属的反射膜或者多层介质膜组成的高反射膜系。
优选地，上述技术方案中，所述第一光束可以是单色LED光束或者同向的双色LED光束或者同向的三色LED光束；所述第二光束也可以是单色LED光束或者同向的双色LED光束或者同向的三色LED光束，可以根据实际需要设置
优选地，上述技术方案中，所述合光装置包括齿形结构，所述齿形结构包括两个或多个反射面，所述第一反射面和第二反射面分别设置在齿形结构的反射面上，第一反射面和第二反射面的夹角为钝角。
优选地，上述技术方案中，所述合光装置包括一个第一反射面和一个第二反射面，所述齿形结构包括两个相邻的反射面，所述第一反射面和第二反射面分别设置在齿形结构的两个相邻的反射面上。
优选地，上述技术方案中，所述齿形结构可以包括三角棱镜或者设置为三角棱镜的一部分，或者由两片或多片夹角为钝角的反射镜片组成。
优选地，上述技术方案中，所述合光装置包括多个第一反射面和多个第二反射面，所述齿形结构包括多个相邻的反射面，所述多个第一反射面和多个第二反射面分别设置在齿形结构的相邻的反射面上。这样可以根据入射光束大小设置齿形结构反射面的个数，可以对入射光束全面反射，反射效果好。
为实现上述目的，本发明还提供了一种投影装置，包括：用于产生第一光束的第一光源装置；用于产生第二光束的第二光源装置；上述所述的合光***；光束整形导引装置，用于将来自合光***的光束进行整形并导引到显示芯片；显示芯片；以及投影镜头。
优选地，上述技术方案中，所述第一光源装置和第二光源装置均采用二向色分光镜片组对三色LED光源产生的光束进行合光，产生不同向的第一光束和第二光束；第一光束和第二光束均为同向的三色LED光束。
优选地，上述技术方案中，所述投影装置可具有一个或多个合光***；第一光源装置和第二光源装置中也可包括一个或多个合光***，利用合光***来对单色LED光束或者同向的双色LED光束进行合光。
优选地，上述技术方案中，所述显示芯片为DMD或者LCOS或者LCD。
本发明的有益效果是：与现有技术相比，本发明提供了一种光束合光***及其投影装置，所述光束合光***，包括：入射方向不同的第一光束和第二光束；以及对第一光束和第二光束进行反射并使得经反射后的光束 沿同一方向传播的合光装置；所述合光装置包括：对第一光束进行反射的第一反射面，以及对第二光束进行反射的第二反射面；该光束合光***采用齿形合光装置对来自入射方向不同的两束光束进行合光，使两束光束汇聚成同一方向的光束，大大增强了光束的光照强度，进而在保证尺寸和重量满足条件的前提下，提高了采用该合光***的投影装置的性能，可给用户带来更好的视觉享受。
附图说明
图1是本发明光束合光***的第一实施例的结构示意图；
图2是本发明光束合光***的第一实施例中锯齿形透镜的截面示意图；
图3是本发明光束合光***的第二实施例的结构示意图；
图4是本发明的投影装置第一实施例的结构示意图；
图5是本发明的投影装置第二实施例的结构示意图；
图6本发明的投影装置第二实施例的局部结构示意图。
具体实施方式
下面结合附图，对本发明的具体实施方式进行详细描述，但应当理解本发明的保护范围并不受具体实施方式的限制。
除非另有其它明确表示，否则在整个说明书和权利要求书中，术语“包括”或其变换如“包含”或“包括有”等等将被理解为包括所陈述的元件或组成部分，而并未排除其它元件或其它组成部分。
参阅图1和图2；图1是本发明光束合光***的第一实施例的结构示意图；图2是本发明光束合光***的第一实施例中合光装置的截面示意图，本实施例中，该合光装置为锯齿形透镜。如图1和图2所示，根据本发明具体实施方式的一种光束合光***，包括：入射方向不同的第一光束11和 第二光束12以及合光装置13；其中，合光装置13，包括：第一反射面S1和第二反射面S2，第一反射面S1对第一光束11进行反射，第二反射面S2对第二光束12进行反射，经反射后第一光束11和第二光束12可合成一束沿同一方向传播的光束。
在本实施方式中，所述合光装置13包括：多个第一反射面S1和多个第二反射面S2，所述齿形结构包括多个相邻的反射面，所述多个第一反射面S1和多个第二反射面S2分别设置在齿形结构的相邻的反射面上。
本实施例中合光装置13为包括齿形结构的锯齿形透镜，齿形结构设置有两个第一反射面S1和两个第二反射面S2，锯齿形透镜具有底面L(图2中虚线L’与底面L平行)，锯齿形透镜底面L与经反射面反射后的光束正交设置，所述第一反射面S1和第二反射面S2分别相互间隔设置在齿形结构的相邻面上，第一反射面和第二反射面的夹角为钝角。锯齿形透镜可以由两个或多个三角棱镜组成，两个或多个三角棱镜可以相互接触相邻或者不接触相邻；或者由多片夹角为钝角的反射镜片组成，多片夹角为钝角的反射镜片可以相互接触相邻或者不接触相邻。所述齿形结构的结构可以对称，也可以不对称；优选齿形结构的结构对称。当然可以根据需要将齿形结构的相邻的面之间的角度设置成不同角度。所述齿形结构可以是一个具有多个反射面的整体结构，也可以用相邻的两个或多个齿形结构的一部分来拼接成一个完成的齿形结构，相邻的两个齿形结构的一部分可以接触相邻，也可以不接触相邻。值得注意的是，齿形结构的第一反射面S1和第二反射面S2的个数由入射光束大小决定，需保证锯齿形透镜可完全接收入射光束；可以根据所需的第一反射面S1和第二反射面S2的个数设置齿形结构的反射面的个数，还可以根据需要设置仅仅包含一个第一反射面S1的部分齿形结构，或者仅仅包含第二反射面S2的部分齿形结构。齿形结构上设置的第一反射面S1和第二反射面S2的个数可以相同也可以不同，角度可以相同也可以不同。根据实际的入射光束来调整个数和角度。第一反射面S1 和第二反射面S2之间可以相邻，也可以不相邻。比如可以将第一反射面S1和第二反射面S2交替设置在齿形结构的相邻反射面上，也可以同时将两个或多个第一反射面S1设置在相邻位置，同时将两个或多个第二反射面S2设置在相邻位置，等等，根据实际情况设置。
第一反射面S1和第二反射面S2的夹角α为钝角，可保证第一反射面S1和第二反射面S2更为有效地反射第一光束11和第二光束12；另外，所述第一反射面S1和第二反射面S2镀有金属的反射膜或者多层介质膜组成的高反射膜系；夹角α设置为钝角也可使反射膜或反射涂层的加工过程更为简单均匀，进而保证了第一反射面S1和第二反射面S2的反射性能。
在本实施方式中，所述第一光束11和第二光束12均可以是单色LED光束或者同向的双色LED光束或者同向的三色LED光束；第一光束11和第二光束12可为平行光束也可以为不平行光束；但是经合光装置13合光后可汇成一束平行光束入射到其他装置，大大增强了光束的光照强度。
在本实施方式中，其中第一反射面S1和第二反射面S2与锯齿形透镜底面L的夹角分别为角β和角γ，角β和角γ的角度可以相等也可以不相等；第一光束11入射方向的与锯齿形透镜底面L的夹角与角β负相关，即角β增大则第一光束11入射方向与锯齿形透镜底面L的夹角则变小；同理，第二光束12入射方向的与锯齿形透镜底面L的夹角与角γ负相关，即角γ减小则第二光束12入射方向与锯齿形透镜底面L的夹角则变大。
图3是本发明光束合光***的第二实施例的结构示意图；由图3所示，与第一实施例相比，第二实施例不同点主要在于：所述合光装置包括：一个第一反射面S3和一个第二反射面S4，所述齿形结构33包括两个相邻的反射面，所述第一反射面S3和第二反射面S4分别设置在齿形结构33的两个相邻的面上，第一反射面S3对第一光束31进行反射，第二反射面S4对第二光束32进行反射，经反射后第一光束31和第二光束32可合光成同 一平行光束；所述齿形结构33可以是一个具有两个反射面的整体结构，也可以用相邻的两个齿形结构的一部分来代替一个完成的齿形结构，相邻的两个齿形结构的一部分可以接触相邻，也可以不接触相邻，其中一个齿形结构的一部分设置有第一反射面S3，另一个齿形结构的一部分设置有第二反射面S4。
本实施例中，所述齿形结构33可以为具有第一反射面S3和第二反射面S4的三角棱镜或者两片夹角为钝角的反射镜片组成；与第一实施例相同的是，所述第一反射面S3和第二反射面S4镀有金属的反射膜或者多层介质膜组成的高反射膜系；夹角α设置为钝角。
在本实施方式中，所述第一光束31可以是单色LED光束或者同向的双色LED光束或者同向的三色LED光束；第二光束32可以是单色LED光束或者同向的双色LED光束或者同向的三色LED光束；第一光束31和第二光束32可为平行光束也可以为不平行光束；但是经单个齿形结构33合光后可汇成一束平行光束入射到其他装置，大大增强了光束的光照强度。
图4是本发明的投影装置第一实施例的结构示意图；如图4所示，根据本发明具体实施方式的投影装置的具体结构包括：用于产生第一光束的第一光源装置41；用于产生第二光束的第二光源装置42；第一实施例所述的合光***43；光束导引装置44，用于将来自合光***的光束进行整形并导引到显示芯片；显示芯片45；以及投影镜头46。
其中，第一光源装置41用于产生第一光束，第二光源装置42用于产生第二光束；第一光源装置41和第二光源装置42均采用二向色分光镜片组来对三色LED光源产生的光束进行合光；三基色LED光源经准直透镜组准直后，一色LED光束经二向色分光镜片组透射，另外二色LED光束经二向色分光镜片组反射后汇聚成同向的第一光束或者第二光束，再经复眼透镜和中继透镜均匀化后入射到合光***43；在合光***43的作用下，不 同向的第一光束和第二光束汇聚成同向光束进入光束导引装置44；所述光束导引装置44由自由曲面棱镜和直角棱镜组成；光束导引装置44，将来自合光***43的光束进行整形并导引到显示芯片45；当显示芯片45为开时，投影光束进入投影镜头46并进行投影显示。在本实施方式中，显示芯片45的入光面与合光***43中的锯齿形透镜的底面L正交；由于合光***43的作用，投影光束的光照强度较大，大大挺高了投影装置的投影性能以及显示效果，可给用户带来更好的视觉享受。
在本实施方式中，所述显示芯片45可以为DMD或者LCOS或者LCD。
图5是本发明的投影装置第二实施例的结构示意图；图6本发明的投影装置第二实施例的局部结构示意图。如图5和图6所示，该第二实施例与第一实施例的不同处在于，显示芯片55所摆放的角度与第一实施例不同，进而光束导引装置54的角度也有所不同；所述光束导引装置54可以由直角棱镜组构成，其与显示芯片55之间的光路走向如图6所示；本实施例中，显示芯片55的入光面依然与合光***53中的锯齿形透镜的底面L正交，但是所摆放的位置有所不同，显示芯片55的入光面和第一实施例中的显示芯片45的入光面成正交关系(本图示由于角度问题没有示出)。
值得注意的是，本发明中，并不限定光束整形导引装置的具体结构，可将出自合光***的光束合理的导入显示芯片的装置均属于本发明的保护范围。本发明所保护的投影装置结构也并不限于上述的方式，所述投影装置可具有一个或多个合光***，优选1至4个合光***；第一光源装置和第二光源装置中也可利用合光***来对单色LED光束或者双色LED光束进行合光。
综上所述，本发明提供了一种光束合光***及其投影装置，所述光束合光***,包括入射方向不同的第一光束和第二光束；以及对第一光束和第二光束进行反射并使得经反射后的光束沿同一方向传播的合光装置；其中，所述合光装置包括：对第一光束进行反射的第一反射面，以及对第二光束 进行反射的第二反射面。
该光束合光***采用合光装置对来自入射方向不同的两束光束进行合光，使两束光束汇聚成同一方向的光束，大大增强了光束的光照强度，进而在保证尺寸和重量满足条件的前提下，提高了采用该合光***的投影装置的性能，可给用户带来更好的视觉享受。
合光装置不一定设置成齿形结构，比如可以包括一个或多个相邻设置的梯形结构，第一反射面和第二反射面可以设置在梯形结构的两侧；或者合光装置可以为包括两侧呈阶梯形设置的结构，等等。
前述对本发明的具体示例性实施方案的描述是为了说明和例证的目的。这些描述并非想将本发明限定为所公开的精确形式，并且很显然，根据上述教导，可以进行很多改变和变化。对示例性实施例进行选择和描述的目的在于解释本发明的特定原理及其实际应用，从而使得本领域的技术人员能够实现并利用本发明的各种不同的示例性实施方案以及各种不同的选择和改变。本发明的范围意在由权利要求书及其等同形式所限定。

Claims (9)

  1. 一种光束合光***,其特征在于，包括：
    入射方向不同的第一光束和第二光束；
    以及对第一光束和第二光束进行反射并使得经反射后的光束沿同一方向传播的合光装置；
    其中，所述合光装置包括：对第一光束进行反射的第一反射面，以及对第二光束进行反射的第二反射面。
  2. 根据权利要求1所述的光束合光***，所述第一光束可以是单色LED光束或者同向的双色LED光束或者同向的三色LED光束；所述第二光束也可以是单色LED光束或者同向的双色LED光束或者同向的三色LED光束。
  3. 根据权利要求1所述的光束合光***，所述合光装置包括齿形结构，所述齿形结构包括两个或多个反射面，所述第一反射面和第二反射面分别设置在齿形结构的反射面上，第一反射面和第二反射面的夹角为钝角。
  4. 根据权利要求3所述的光束合光***，所述合光装置包括一个第一反射面和一个第二反射面，所述齿形结构包括两个相邻的反射面，所述第一反射面和第二反射面分别设置在齿形结构的两个相邻的反射面上。
  5. 根据权利要求3所述的光束合光***，所述齿形结构可以包括三角棱镜或者设置为三角棱镜的一部分，或者由两片或多片夹角为钝角的反射镜片组成。
  6. 根据权利要求3所述的光束合光***，所述合光装置包括多个第一反射 面和多个第二反射面，所述齿形结构包括多个相邻的反射面，所述多个第一反射面和多个第二反射面分别设置在齿形结构的相邻的反射面上。
  7. 一种投影装置，其特征在于，包括：用于产生第一光束的第一光源装置；用于产生第二光束的第二光源装置；上述权利要求1-6所述的合光***；光束整形导引装置，用于将来自合光***的光束进行整形并导引到显示芯片；显示芯片；以及投影镜头。
  8. 根据权利要求7所述的投影装置，所述第一光源装置和第二光源装置均采用二向色分光镜片组对三色LED光源产生的光束进行合光，产生不同向的第一光束和第二光束；第一光束和第二光束均为同向的三色LED光束。
  9. 根据权利要求7所述的投影装置，所述投影装置可具有一个或多个合光***；第一光源装置和第二光源装置中也可包括一个或多个合光***，利用合光***来对单色LED光束或者同向的双色LED光束进行合光。
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