WO2018000520A1

WO2018000520A1 - Dlp projection module

Info

Publication number: WO2018000520A1
Application number: PCT/CN2016/093425
Authority: WO
Inventors: 高志强; 赵远; 梅良; 林清云
Original assignee: 广景视睿科技（深圳）有限公司
Priority date: 2016-06-29
Filing date: 2016-08-05
Publication date: 2018-01-04
Also published as: CN205827039U

Abstract

A DLP projection module comprising: a projection lighting system (10), which comprises: an LED light source, a light source collimation system, a beam-splitting lens set, and a complex-eye lens or light rod; an optical path guidance system (20); a DMD light modulator (30); a projection lens set (40); an accommodating cavity (50) used for packaging sequentially the described optical components and extending in two different directions; and a heat dissipating module. The optical path guidance system (20) comprises a prism component used for guiding a lighting beam coming from the projection lighting system (10) to the DMD light modulator (30); the shorter side (30a) of the DMD light modulator (30) is parallel to the direction in which a projection beam exits the projection lens set (40); and the angle between the two direction in which the accommodating cavity (50) extends is 90-110 degrees. The DLP projection module has a simple and rational structure and a compact layout, the optical path guidance system (20) obviates the use of a mirror, thus greatly increasing the projection lighting brightness, and increasing projection quality.

Description

A DLP projection module

Technical field

The present invention relates to the field of digital projection display technology, and more particularly to a DLP projection module.

Background technique

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. Driven by the strong demand of users, 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.

At present, with the rapid development of projection display technology, the volume of projection display products is continuously decreasing, and the brightness is also required to be continuously improved. In projection display products, projection display light source is a very important component. The function of the DLP projection module is to convert as much as possible the large-angle distribution of the beam, the illumination light of different shapes and brightness, into a uniform spot that illuminates the effective area of the display chip, and realize a uniform and bright projection display. . In order to better use the projection module, the user can enjoy a better visual enjoyment. Under the premise of keeping the design of the projection optical path simple and efficient, the invention has the advantages of small size, low optical loss and enhanced light intensity for high light output. This also becomes one of the technical problems to be solved by those skilled in the art.

The information disclosed in this Background section is only intended to provide an understanding of the general background of the invention, and should not be construed as an admission

Summary of the invention

In view of the above technical problems, an object of the present invention is to provide a DLP projection module that has a simple and reasonable structure, a compact layout, high brightness, and good projection quality.

To achieve the above object, the present invention provides a DLP projection module, comprising: a projection illumination system comprising: an LED light source, a light source collimation system, a spectroscopic lens group, and a fly-eye lens or a light bar; an optical path guiding system; DMD a light modulator; a projection lens group; an accommodating cavity extending in two different directions for sequentially packaging the optical element; and a heat dissipation module; wherein the light path guiding system includes illumination for the projection illumination system The light beam is directed to the prism element of the DMD light modulator; the shorter side of the DMD light modulator is parallel to the exit direction of the projection beam of the projection lens group; and the angle between the two extending directions of the receiving cavity It is 90-110 degrees.

Preferably, in the above technical solution, the accommodating cavity is integrally provided.

Preferably, in the above technical solution, the accommodating cavity comprises an optical component mounting base and a sealing cover that cooperate with each other to form a cavity.

Preferably, in the above technical solution, the accommodating cavity includes a first accommodating cavity and a second accommodating cavity which are connected to each other, and the first accommodating cavity is connected to the second accommodating cavity The angle between the two extending directions is 90-110 degrees.

Preferably, in the above technical solution, the first accommodating cavity includes a first optical component mounting base and a first sealing cover that cooperate with each other to form a cavity, and the second accommodating cavity includes a cavity to form a cavity. a second optical component mounting base and a second sealing cover,

The angle between the two extending directions after the first optical component mounting base and the second optical component mounting base are connected to each other is 90-110 degrees;

The angle between the two extending directions after the first sealing cover and the second sealing cover are connected to each other is 90-110 degrees.

Preferably, in the above technical solution, the prism element comprises a right angle prism or a glued right angle Prism group.

Preferably, in the above technical solution, the right-angle prism or the glued right-angle prism group has a surface that totally reflects the incident light beam or/and an optical surface plated with the reflective film.

Preferably, in the above technical solution, the angle between the illumination beam exiting direction of the projection illumination system and the projection beam exiting direction of the projection lens group is between 90° and 110°.

Preferably, in the above technical solution, the optical path guiding system further comprises a free-form lens or a spherical lens that can converge and guide the illumination beam.

Preferably, in the above technical solution, the free curved surface of the free-form optical component is described by:

Where Z is the height of the surface, X and Y are the projection coordinates of the height of the surface on the optical axis, A1 to A9 are positional parameters, and C and k are curvature parameters.

Preferably, in the above technical solution, the heat dissipating module manufacturing material is metal aluminum or metal copper, and is connected to the accommodating cavity through a connecting member; the heat dissipating module shape and the accommodating cavity of the DLP pico projector system. The outer part of the structure shape matches.

Preferably, in the above technical solution, the accommodating cavity is prepared by using a plastic material or a metal material.

Preferably, in the above technical solution, the heat dissipating module is made of metal aluminum or metal copper, and is connected with the accommodating cavity by a screw structure or a screw structure or a fixed riveting structure or a bonding structure; The hollow cylindrical structure or the rectangular parallelepiped structure matches the shape of the accommodating cavity structure of the DLP micro projector system, so that the heat dissipation module and the accommodating cavity are tight fit.

Compared with the prior art, the present invention has the following beneficial effects: the DLP projection module includes: a projection illumination system, including: an LED light source, a light source collimation system, a spectroscopic lens group, and a fly-eye lens or a light bar; a DMD light modulator; a projection lens group; an accommodating cavity for sequentially packaging the optical component; and a heat dissipation module; wherein the optical path guiding system comprises a right-angle prism or a glued right-angle prism group for The illumination beam of the projection illumination system is directed to the DMD light modulator; the wide side of the DMD light modulator is parallel to the exit direction of the projection beam of the projection lens group; the receiving cavity extends in two different directions to be similar to L Type structure. The DLP projection module has a simple and reasonable structure and a compact layout. The optical path guiding system omits the use of the mirror, greatly enhances the brightness of the projection illumination, and improves the projection quality.

DRAWINGS

1 is a schematic structural view of an embodiment of a DLP projection module of the present invention;

2 is a schematic structural view of a receiving cavity of an embodiment of the DLP projection module of the present invention;

3 is a partial schematic structural view of an embodiment of a DLP projection module of the present invention.

detailed description

The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it is understood that the scope of the present invention is not limited by the specific embodiments.

The term "comprising" or variations such as "comprises" or "comprises", etc., are to be understood to include the recited elements or components, and Other components or other components are not excluded.

1 is a schematic structural view of an embodiment of a DLP projection module of the present invention; FIG. 2 is a schematic structural view of an accommodating cavity of an embodiment of the DLP projection module of the present invention; and FIG. 3 is a DLP projection of the present invention; A schematic diagram of a partial structure of a module; as shown in FIG. 1 , FIG. 2 and FIG. 3 , a DLP projection module according to an embodiment of the present invention includes: a projection illumination system 10 including: an LED light source and a light source collimation system a spectroscopic lens group and a fly-eye lens or a light bar; an optical path guiding system 20; a DMD light modulator 30; a projection lens group 40; and an accommodating cavity 50 for sequentially packaging the optical elements in two different directions; a heat dissipation module (not shown); wherein the optical path guiding system 20 includes prism elements for directing an illumination beam from the projection illumination system 10 to the DMD light modulator 30; the DMD light modulator 30 The aspect ratio is 16:9 or 4:3, and the shorter side 30a of the DMD light modulator 30 is parallel to the projection beam exit direction of the projection lens group 40.

In this embodiment, the angle a between the two extending directions of the accommodating cavity 50 is 90-110 degrees.

In this embodiment, the housing 50 can be integrally provided.

In this embodiment, the accommodating cavity 50 may include an optical component mounting base and a sealing cover that cooperate to form a chamber.

In this embodiment, the accommodating cavity 50 may include a first accommodating cavity and a second accommodating cavity, and the first accommodating cavity is connected to the second accommodating cavity. The angle a between the two extending directions is 90-110 degrees, so that the entire receiving cavity 50 has an L-like structure.

Of course, in addition to the structure of the accommodating cavity 50 described in FIG. 2, the accommodating cavity 50 can also be configured as other types of structures as long as it can satisfy the projection illumination system; the optical path guiding system; the DMD light modulator; the projection lens group. Both are accommodated in the accommodating cavity 50, and the angle between the direction of the illumination beam from the projection illumination system and the direction of the projection beam exiting the projection lens group is between 90° and 110°. For example, the first accommodating cavity itself has a cavity with an angle a extending in two directions, and the second accommodating cavity is a unidirectional cavity, which can be connected to the first accommodating cavity. The angle a between the two extending directions after the first accommodating cavity and the second accommodating cavity are connected to each other is 90-110 degrees. Or the second accommodating cavity itself has a cavity with an angle a extending in two directions, and the first accommodating cavity is a unidirectional cavity, which can be connected to the second accommodating cavity. The first accommodating cavity and the second accommodating cavity are connected to each other The angle a between the two extending directions is 90-110 degrees.

In this embodiment, the prism elements are right angle prisms or glued right angle prism groups, and of course other types of prisms.

In this embodiment, the first accommodating cavity may include a first optical component mounting base and a first sealing cover that cooperate to form a cavity, and the second accommodating cavity may include a cavity to form a cavity The second optical component mounts the base and the second sealing cover.

The angle between the two extending directions after the first optical component mounting base and the second optical component mounting base are connected to each other is 90-110 degrees. The angle between the two extending directions after the first sealing cover and the second sealing cover are connected to each other is 90-110 degrees, so that the optical component mounting base and the sealing cover are similar to L Type structure.

In this embodiment, the first optical component mounting base and the second optical component mounting base may be integrally connected, and the first sealing cover and the second sealing cover are also integrally connected.

In this embodiment, the first optical component mounting base and the second optical component mounting base may be connected separately, and the first sealing cover and the second sealing cover are also separated.

In this embodiment, the first optical component mounting base and the second optical component mounting base may be integrally connected, and the first sealing cover and the second sealing cover are connected separately.

In this embodiment, the first optical component mounting base and the first sealing cover may be connected separately, and the second optical component mounting base and the second sealing cover may also be connected separately. .

That is to say, in the embodiment, the accommodating cavity 50, the optical component mounting base, and the sealing cover can be provided with a component body or a joint body as needed.

In this embodiment, the angle between the light exiting direction of the illumination beam from the projection illumination system 10 and the light exiting direction of the projection beam from the projection lens group 40 is between 90° and 110°. The light exiting direction of the projection beam from the projection lens group 40 is parallel to the axis of the accommodating cavity, so that the light beam can be smoothly emitted out of the cavity. In this range of angles, the optical components can be easily fine-tuned under the premise of ensuring the projection quality of the DLP projection module.

This embodiment does not specifically describe and limit the optical component structure included in the projection illumination system 10. In short, through the reasonable combination and optical design of the optical component, the DLP projection module is substantially L without affecting the projection quality. Type arrangement, compact and reasonable layout, light and portable.

In this embodiment, the optical path guiding system 20 further includes a free-form lens that can converge and guide the illumination beam from the projection illumination system.

In this embodiment, the right-angle prism or the glued right-angle prism group and/or the free-form surface lens have a surface that totally reflects the incident light beam or/and an optical surface that is coated with a reflective film.

In this embodiment, the free curved surface of the free-form optical component is described by:

In the present invention, the DLP projection module is basically arranged in an L-shape. Under the premise of ensuring the efficiency of the illumination beam, the beam guiding system 20 also omits a mirror to change the direction of the beam compared with the conventional projection module, and reduces The energy loss of the illumination beam.

In this embodiment, the accommodating cavity can be prepared by using a plastic material or a metal material, and the plastic material preparation has the advantages of highly aligning the display chip and the projection lens and reducing the cost and weight of the projector; , can further solve the problem of heat dissipation of the projector optomechanical structure. Conventionally, the optical component mounting base is made of a plastic material, and the sealing cover is made of a metal material such as an aluminum alloy or a magnesium alloy.

In this embodiment, the card slot and the light source mounting structure on the optical component mounting base can be modified according to the position and number of the mounted optical components, and the matching sealing cover can also be adjusted accordingly.

In this embodiment, the split connection may be connected by a connector, and the connector may be a screw, a bolt or the like. It is also possible to realize the split connection by other means such as riveting, bonding, and fitting. Elastic rubber gaskets may be provided between the joints.

In this embodiment, the heat dissipating module is made of metal aluminum or metal copper, and is connected to the accommodating cavity through a connecting member, and the connecting member may be a screw, a bolt or the like, or may be spliced and bonded. Other ways of realizing the connection by mutual fitting; the shape of the heat dissipating module is matched with the partial structure and shape of the external part of the accommodating cavity structure of the DLP projection module, and may be a hollow cylindrical structure or a rectangular structure such as a rectangular parallelepiped structure. Preferably, the heat dissipation module is in close contact with the accommodating cavity.

The DLP projection module of the present invention comprises: a projection illumination system comprising: an LED light source, a light source collimation system, a spectroscopic lens group, and a fly-eye lens or a light bar; an optical path guiding system; a DMD light modulator; a projection lens group; An accommodating cavity for sequentially packaging the optical element; and a heat dissipation module; wherein the optical path guiding system comprises a right angle prism or a glued right angle prism group for guiding an illumination beam from the projection illumination system to the DMD light modulation The DMD optical modulator has an aspect ratio of 16:9, and the wide side of the DMD optical modulator is parallel to the projection beam exiting direction of the projection lens group; the accommodating cavity has an L-like structure. The DLP projection module has a simple and reasonable structure and a compact layout. The optical path guiding system omits the use of the mirror, greatly enhances the brightness of the projection illumination, and improves the projection quality.

The foregoing description of the specific exemplary embodiments of the present invention has The description is not intended to limit the invention to the precise forms disclosed. The embodiments were chosen and described in order to explain the particular embodiments of the invention Choose and change. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

A DLP projection module, comprising:

a projection illumination system comprising: an LED light source, a light source collimation system, a spectroscopic lens group, and a fly-eye lens or a light rod;

Optical path guiding system; DMD light modulator; projection lens group;

a accommodating cavity extending in two different directions for sequentially packaging the above optical elements;

And a heat dissipation module;

Wherein the optical path guiding system includes a prism element for directing an illumination beam from the projection illumination system to the DMD light modulator;

The shorter side of the DMD light modulator is parallel to the exit direction of the projection beam of the projection lens group;

The angle between the two extending directions of the accommodating cavity is 90-110 degrees.
The DLP projection module according to claim 1, wherein the accommodating cavity is integrally provided.
The DLP projection module according to claim 1, wherein the accommodating cavity comprises an optical component mounting base and a sealing cover that cooperate to form a chamber.
The DLP projection module of claim 1 , wherein the accommodating cavity comprises a first accommodating cavity and a second accommodating cavity, and the first accommodating cavity is The angle between the two extending directions after the second receiving cavity is connected is 90-110 degrees.
The DLP projection module according to claim 4, wherein

The first accommodating cavity includes a first optical component mounting base and a first sealing cover that cooperate to form a chamber,

The second accommodating cavity includes a second optical component mounting base and a second sealing cover that cooperate to form a chamber,

The angle between the two extending directions after the first optical component mounting base and the second optical component mounting base are connected to each other is 90-110 degrees;

The angle between the two extending directions after the first sealing cover and the second sealing cover are connected to each other is 90-110 degrees.
The DLP projection module according to claim 1, wherein the prism element comprises a right angle prism or a glued right angle prism group.
The DLP projection module according to claim 6, wherein the right-angle prism or the glued right-angle prism group has a surface that totally reflects the incident light beam or/and an optical surface that is coated with a reflective film.
The DLP projection module according to claim 1, wherein an angle between the illumination beam exiting direction of the projection illumination system and the projection beam exiting direction of the projection lens group is between 90° and 110°.
The DLP projection module according to claim 1, wherein the optical path guiding system further comprises a free-form lens or a spherical lens that can converge and guide the illumination beam.
The DLP projection module according to claim 1, wherein the heat dissipating module is made of metal aluminum or metal copper, and is connected to the accommodating cavity by a connecting member; the heat dissipating module has a shape and a DLP micro The partial structural shape of the outside of the accommodating cavity of the projector system is matched.