CN104678691A - Light source system and display device - Google Patents

Abstract

The invention provides a light source system, which comprises a laser light source module and at least one optical coupling module. The laser light source module is provided with a plurality of laser light sources, and each laser light source can provide a light ray. The optical coupling module comprises a light incident surface, a plurality of total reflection surfaces and a light emergent surface. The light incident surface comprises a plurality of light incident blocks, and the plurality of light incident blocks are respectively arranged corresponding to the laser light sources. The total reflection surfaces are respectively arranged corresponding to a light incident block. The projection areas of the total reflection surfaces on the light-emitting surface are not overlapped. The invention can couple a plurality of light sources without increasing the light expansion amount by matching at least one optical coupling module and the laser light source module, and arranging the light inlet surface of the optical coupling module and the laser light source module correspondingly, guiding the light of the laser light source module to a plurality of total reflection surfaces, and then coupling the light and leaving the light from the light outlet surface in parallel.

Description

Light source system and display device

technical field

The present invention relates to an optical system, in particular to a light source system.

Background technique

In addition to the light source system using a single light source, the existing light source system also includes a light source system using multiple light sources, and because the multi-light source system can provide higher brightness and be applied to naked-view stereoscopic projection devices, etc., it is generally used. The light source system of multiple light sources is the main one.

However, different from the light source system with a single light source, the multi-light source system must consider coupling multiple light sources without increasing the etendue and reducing light loss.

One approach can be to start with the light source. Since the etendue of the laser light source itself is smaller than that of the existing UHP lamp (Ultra High Performance ultra-high pressure mercury bulb), the use of a laser light source is one of the methods to reduce the etendue. In addition, another advantage of using a laser light source is that the volume of the laser light source is small, even if multiple laser light sources are used, the volume increase of the overall light source system is limited.

Moreover, it is also possible to start with the way of optical coupling. There are two methods for this. One is to couple multiple light sources through optical fibers and transmit them in a specific direction. However, as the distance of optical fibers increases, the overall optical loss will also increase. Alternatively, light from multiple light sources arranged in an array can also be guided to a specific direction through a stepped reflector/reflector prism. However, because of the gap between adjacent mirrors and the divergence caused by the light traveling, the etendue inevitably accumulates when the stepped mirror is used as an addition, resulting in waste.

In view of this, how to provide a light source system with low etendue, low light loss and coupling multiple light sources is an urgent problem to be solved in the industry.

Contents of the invention

In view of the above problems, the main objective of the present invention is to provide a light source system with low etendue, less light loss and capable of coupling multiple light sources.

To achieve the above purpose, the present invention provides a light source system, including a laser light source module and at least one optical coupling module.

The laser light source module has a plurality of laser light sources, and each of the laser light sources can provide a light.

At least one optical coupling module includes a light incident surface, a plurality of total reflection surfaces and a light output surface.

The light-incident surface includes a plurality of light-incident blocks, and the plurality of light-incident blocks are respectively arranged corresponding to the laser light sources. Each of the total reflection surfaces corresponds to a light-incident block. Wherein, the projected areas of the total reflection surfaces and the light-emitting surface do not overlap.

In a preferred embodiment of the present invention, the light beams of each laser light source enter the optical coupling module, the multiple light beams will be reflected by the multiple total reflection surfaces and exit from the light exit surface, and the optical paths of the multiple light beams are parallel.

In a preferred embodiment of the present invention, the light output surface of one optical coupling module corresponds to the light incident surface of the other optical coupling module.

In a preferred embodiment of the present invention, it further includes a light combination module disposed on the light output surface of the light coupling module. Moreover, the light combination module can be a beam splitter or a reflector.

In a preferred embodiment of the present invention, the plurality of laser light sources at least include red lasers, blue lasers and green lasers.

In addition, the present invention can further provide a display device, which includes a display screen, a projection device, and a light source system. The light source system can provide a light source for the projection device, and the projection device can form multiple viewing areas on the display screen.

The light source system includes a laser light source module and at least one optical coupling module.

The laser light source module has a plurality of laser light sources, and each of the laser light sources can provide a light. At least one optical coupling module includes a light incident surface, a plurality of total reflection surfaces and a light output surface. The light-incident surface includes a plurality of light-incident blocks, and the plurality of light-incident blocks are respectively arranged corresponding to the laser light sources. Each of the total reflection surfaces corresponds to a light-incident block. Wherein, the projected areas of the total reflection surfaces and the light-emitting surface do not overlap.

In a preferred embodiment of the present invention, the display screen includes a double-layer lenticular lens. The double-layer lenticular lens has two lenticular lens layers and an omnidirectional diffusion plate sandwiched between the lenticular lens layers.

In a preferred embodiment of the present invention, the light beams of each laser light source enter the optical coupling module, the multiple light beams will be reflected by the multiple total reflection surfaces and exit from the light exit surface, and the optical paths of the multiple light beams are parallel.

In a preferred embodiment of the present invention, the light output surface of one of the optical coupling modules corresponds to the light incident surface of the other optical coupling module.

In a preferred embodiment of the present invention, it further includes a light combination module disposed on the light output surface of the light coupling module. Moreover, the light combination module can be a beam splitter or a reflector.

In a preferred embodiment of the present invention, the plurality of laser light sources at least include red lasers, blue lasers and green lasers.

In this embodiment, at least one optical coupling module is matched with the laser light source module, and the light incident surface of the optical coupling module is set correspondingly to the laser light source module. After the light from the laser light source module is guided to multiple total reflection surfaces, the light After coupling, they are separated from the light-emitting surface in parallel, so as to couple multiple light sources without increasing the etendue.

Description of drawings

FIG. 1 is a schematic diagram of a first embodiment of the light source system of the present invention.

FIG. 2A is a schematic diagram of a second embodiment of the light source system of the present invention.

FIG. 2B is a schematic perspective view of the light source system in FIG. 2A from another angle.

FIG. 3 is a schematic diagram of a third embodiment of the light source system of the present invention.

Wherein, the reference signs are explained as follows:

1, 2, 3: Light source system

12: Laser light source module

12A, 12B, 12C: laser light source

14, 24A, 24B, 24C, 24D, 34A, 34B, 34C: optical coupling module

142: light incident surface

142a, 142b, 142c: incident light blocks

144a, 144b, 144c: total reflection surface

146, 246a, 246b, 246c, 246d: light-emitting surface

36A, 36B: combined light module

Detailed ways

A light source system and a projection device using the light source system according to preferred embodiments of the present invention will be described below with reference to related drawings, wherein the same elements will be described with the same reference symbols.

Meanwhile, in the following embodiments and drawings, components not directly related to the present invention have been omitted and not shown; and the dimensional relationship between the components in the drawings is only for easy understanding, and is not used to limit the actual ratio.

Moreover, the light source system of the present invention can also be applied to a display device. The display device at least includes a display screen, a projection device and a light source system.

If it is applied to a naked-view stereoscopic projection device, the display screen of the display device may further include a double-layer lenticular lens, and the double-layer lenticular lens has two lenticular lens layers and an omnidirectional diffusion plate sandwiched between the two lenticular lens layers. .

The light source system provided by the present invention can be used to provide a plurality of light sources with extremely small etendue required by naked-view stereoscopic projection devices, and the projection device can use the multiple light sources with extremely small etendue to display through double-layer lenticular lenses. A screen that forms multiple fields of view at the observer.

The "projection device" referred to here can be a digital light processing (Digital Light Processing; DLP) projection display or a liquid crystal projection device (Liquid Crystal Display; LCD), or a single crystal silicon liquid crystal display (Liquid Crystal On Silicon System, LCOS System ) and other devices with projection display functions.

The light source system of the present invention will be described below.

First of all, please refer to FIG. 1 , which is a schematic diagram of a first embodiment of the light source system of the present invention.

The light source system 1 of this embodiment includes a laser light source module 12 and at least one optical coupling module 14 .

The laser light source module 12 has a plurality of laser light sources, and each of the laser light sources can provide a light. Taking this embodiment as an example, the laser light source module 12 has three laser light sources 12A, 12B, and 12C. And the laser light sources 12A, 12B, 12C are arranged on the same plane, or can be coupled in the form of a laser light source array.

This embodiment only shows an implementation form in which one optical coupling module 14 is matched with a group of laser light source modules 12 , but it is not limited to this embodiment. The light coupling module 14 includes a light incident surface 142 , a plurality of total reflection surfaces 144 a , 144 b , 144 c and a light output surface 146 .

The light-incident surface 142 includes a plurality of light-incident blocks 142a, 142b, 142c (the light-incident blocks are represented by gray blocks, which are only for convenience and not actual color configuration), and the plurality of light-incident blocks 142a, 142b, 142c Each corresponding to each of the laser light sources 12A, 12B, 12C is provided. In other words, the arrangement and location of the light incident blocks 142 a , 142 b , and 142 c allow the light provided by the laser light sources 12A, 12B, and 12C to enter the optical coupling module 14 .

Moreover, the total reflection surfaces 144a, 144b, and 144c are respectively disposed corresponding to a light incident block 142a, 142b, and 142c. In other words, the positions of the total reflection surfaces 144a, 144b, and 144c in this embodiment are just so that the light entering from the light incident blocks 142a, 142b, and 142c can be reflected. In addition, the total reflection surfaces 144 a , 144 b , 144 c of this embodiment may form an angle of 45 degrees with the light incident surface 142 , so that the incident light and the outgoing light form an angle of 90 degrees.

Taking the laser light source 12A as an example, a light beam provided by the laser light source 12A can enter the optical coupling module 14 from the light input block 142a, converge on the total reflection surface 144a, and leave the optical coupling module 14 from the light output surface 146 after total reflection. . Similarly, a ray of light provided by the laser light source 12B and the laser light source 12C can also enter the optical coupling module 14 from the light incident blocks 142b and 142c respectively, and converge on the total reflection surfaces 144b and 144c, and then exit the light after total reflection Face 146 exits light coupling module 14 .

Moreover, the total reflection surfaces 144a, 144b, and 144c here can be made by coating the total reflection surfaces 144a, 144b, and 144c with a total reflection film.

In addition, it should be added that the projected areas of the total reflection surfaces 144 a , 144 b , 144 c on the light-emitting surface 146 in this embodiment do not overlap. The "non-overlapping projected areas" referred to here means that the total reflection surfaces 144a, 144b, 144c are projected in the direction of the light-emitting surface 146, and the formed projected areas will be adjacently arranged and will not overlap. Therefore, the laser light sources 12A, 12B, The optical paths of the light provided by 12C after being totally reflected by the surfaces 144a, 144b, and 144c will also not overlap.

Please refer to FIG. 1 again. After the light rays of the laser light sources 12A, 12B, and 12C in this embodiment enter the optical coupling module 14, the light rays will be reflected by the total reflection surfaces 144a, 144b, and 144c and leave from the light-emitting surface 146. , and the optical paths of these rays are parallel.

Through the configuration of this embodiment, the optical coupling module 14 can couple multiple laser light sources (three laser light sources) into light rays in the same direction, and transmit them inside the optical coupling module 14. These laser light sources 12A, 12B, and 12C will be In the case that the order is coupled so that the overall brightness of the light source system 1 increases, the etendue will not increase additionally because the travel of light is limited in the prism.

Please refer to FIG. 2A and FIG. 2B together, which are schematic diagrams from two different angles of the second embodiment of the light source system 2 of the present invention.

The difference from the foregoing embodiments lies in that the laser light source module (not shown in the figure) of this embodiment has multiple laser light sources, specifically nine laser light sources (for example, a 3×3 laser array). And in order to match the laser light source module, each optical coupling module in this embodiment includes three laser light source modules (not shown in the figure).

In addition, for the convenience of illustration, the laser light sources are not shown in the figure, but only the light provided by the laser light source (shown by arrows in the figure) is used for illustration.

Taking the optical coupling module 24A as an example, similar to the above-mentioned embodiments, the optical coupling module 24A can couple the light of three laser light sources, and the light of the three laser light sources will leave the light output surface 246a of the optical coupling module 24A. In addition, the light output surface 246a of the optical coupling module 24A will be set corresponding to the light incident surface (not shown) of the optical coupling module 24D. Furthermore, the light output surface 246a of the optical coupling module 24A will correspond to the light input surface of the optical coupling module 24D. Light incident block (not shown) settings on the light incident surface. Moreover, the light-emitting surface 246a of the light-coupling module 24A of this embodiment overlaps with the light-incident block of the light-incoming surface of the light-coupling module 24D (adhesively arranged). However, the areas of the light-emitting surface 246a and the light-incident block are not limited to be equal.

As before, the optical coupling modules 24B and 24C can also respectively couple the light from the three laser light sources (through the light emitting surfaces 246b and 246c to the light incident surface of the optical coupling module 24D). At this time, the light transmitted by the light emitting surfaces 246a, 246b, and 246c of the light coupling modules 24A, 24B, and 24C can also be regarded as three independent light sources. Therefore, the light coupling module 24D can recouple the light provided by the light coupling modules 24A, 24B, and 24C into a beam of light, which exits through the light output surface 246d.

It is supplemented that the shapes of the optical coupling modules 24A, 24B, 24C, and 24D can be flexibly adjusted according to requirements and configurations, and the shapes and sizes of the optical coupling modules 24A, 24B, 24C, and 24D do not need to be exactly the same. In this embodiment, the optical coupling modules 24A, 24B, and 24C have the same shape and size, while the optical coupling module 24D is slightly larger than the optical coupling modules 24A, 24B, and 24C.

The rest of the configuration and the relationship between components and elements are similar to those of the first embodiment, so they will not be repeated here.

Please refer to FIG. 3 , which is a schematic diagram of a third embodiment of the light source system of the present invention.

The difference from the foregoing embodiments lies in that this embodiment further includes a light combination module. In detail, the light source system 3 of this embodiment exemplifies an implementation form in which three light coupling modules 34A, 34B, 34C are combined with two light combining modules 36A, 36B.

It can be clearly understood from the drawings that the light combining modules 36A, 36B of this embodiment are disposed on the light emitting surfaces of the light coupling modules 34A, 34B, 34C.

Similarly, for the convenience of illustration, the laser light sources are not shown in the figure, and only the light provided by the laser light source (shown by arrows in the figure) is used for illustration. In addition, the laser light sources in this embodiment at least include red lasers, blue lasers and green lasers, and the configuration can be three red lasers with the optical coupling module 34A, three blue lasers with the optical coupling module 34B, The three green lasers are matched with the optical coupling module 34C (and because of the angle, part of the light will not be in the drawing). In other words, through this configuration, the light source system 3 of this embodiment can provide a white light source for the projection device.

In detail, the optical coupling module 34A can couple the light from the three red laser light sources, and the light from the three red laser light sources will leave the light output surface of the optical coupling module 34A and enter the light combining module 36A. Moreover, the light-emitting surface of the optical coupling module 34A in this embodiment overlaps with the light-incoming surface of the light-combining module 36A (adhesively arranged). Then, the light coupled by the light coupling module 34A is transmitted and enters the light combining module 36A (transmission).

Next, the light coupling module 34B can couple the light from the three green laser light sources, and the light from the three green laser light sources will leave the light output surface of the light coupling module 34B and enter the light combining module 36A. Moreover, the light-emitting surface of the light-coupling module 34B in this embodiment overlaps with the other light-incoming surface of the light-combining module 36A (adhesive arrangement). Moreover, the light coupled by the optical coupling module 34B is transmitted and enters the light combining module 36A (reflected) to synthesize yellow light with the optical coupling module 34A, and exits from the light output surface of the light combining module 36A.

Next, the optical coupling module 34C can couple the light from the three blue laser light sources, and the light from the three blue laser light sources will leave the light output surface of the optical coupling module 34C and enter the light combining module 36B. Moreover, the light output surface of the light coupling module 34C in this embodiment overlaps with a light input surface of the light combining module 36B (adhesive arrangement). In addition, the light-emitting surface of the light-combining module 36A coincides with the other light-incoming surface of the light-combining module 36B.

Therefore, the light (yellow light) transmitted from the optical coupling module 34A to the optical coupling module 34B enters the light combination module 36A (reflected) and synthesizes white light with the blue light, and then exits from the light output surface of the light combination module 36B.

Moreover, although this embodiment exemplifies that the light combining modules 36A, 36B are beam splitters, in other implementation forms, the light combining modules 36A, 36B can be reflectors, and a light uniform element must be configured according to the actual light combining conditions. If the light-combining modules 36A and 36B are reflectors, the reflectors must consider the optical path of the light provided by each light source to achieve the purpose of reflection and light-combination. For example, multiple perforations can be added on the reflector to facilitate the optical coupling module 34A. , 34B, and 34C perform light transmission, and finally combine a light element to synthesize white light.

To sum up, in this embodiment, through the combination of at least one optical coupling module and the laser light source module, and the light incident surface of the optical coupling module is set correspondingly to the laser light source module, the light from the laser light source module can be led to multiple total reflections. After the surface, the light is coupled and then exits from the light-emitting surface in parallel, so as to couple multiple light sources without increasing the etendue. Through the above configuration, the present invention can achieve the purpose of providing a light source system with low etendue, less light loss and capable of coupling multiple light sources.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the appended patent application.

Claims (13)

1. a light-source system, is characterized in that, comprising:

One laser light source module, has multiple LASER Light Source, and respectively this LASER Light Source provides a light;

At least one optical coupler module, comprising:

One incidence surface, and this incidence surface comprises multiple light inlet block, wherein the plurality of light inlet block correspondence respectively this LASER Light Source setting separately;

Multiple fully reflecting surface, a plurality of fully reflecting surface separately corresponding light inlet block is arranged; And

One exiting surface;

Wherein, the plurality of fully reflecting surface is not overlapping in the projected area of this exiting surface.

2. light-source system as claimed in claim 1, it is characterized in that, respectively the light of this LASER Light Source enters this optical coupler module, and these many light are reflected by the plurality of fully reflecting surface and leave from this exiting surface, and the light path of these many light is parallel.

3. light-source system as claimed in claim 1, is characterized in that, this incidence surface of this exiting surface another this optical coupler module corresponding of this optical coupler module of one is arranged.

4. light-source system as claimed in claim 1, is characterized in that, more comprise a converging module, be arranged at this exiting surface of this optical coupler module.

5. light-source system as claimed in claim 4, it is characterized in that, this converging module is spectroscope or catoptron.

6. light-source system as claimed in claim 1, it is characterized in that, the plurality of LASER Light Source at least comprises a red laser, a blue laser and a green laser.

7. a display device, is characterized in that, comprising:

One display screens;

One projection arrangement; And

One light-source system, provide this projection arrangement one light source, this light-source system comprises:

One laser light source module, has multiple LASER Light Source, and respectively this LASER Light Source provides a light;

At least one optical coupler module, comprising:

One incidence surface, and this incidence surface comprises multiple light inlet block, wherein the plurality of light inlet block correspondence respectively this LASER Light Source setting separately;

Multiple fully reflecting surface, a plurality of fully reflecting surface separately corresponding light inlet block is arranged; And

One exiting surface;

Wherein, the plurality of fully reflecting surface is not overlapping in the projected area of this exiting surface;

Wherein, this projection arrangement forms multiple ken on this display screens.

8. display device as claimed in claim 7, it is characterized in that, this display screens comprises pair of lamina lens pillar, and these two-layer columnar lens have two lens pillar layers and and are sandwiched in omni-directional diffusion plate between this two lens pillars layer.

9. display device as claimed in claim 7, it is characterized in that, respectively the light of this LASER Light Source enters this optical coupler module, and these many light are reflected by the plurality of fully reflecting surface and leave from this exiting surface, and the light path of these many light is parallel.

10. display device as claimed in claim 7, is characterized in that, this incidence surface of this exiting surface another this optical coupler module corresponding of this optical coupler module of one is arranged.

11. display device as claimed in claim 7, it is characterized in that, this light-source system more comprises a converging module, is arranged at this exiting surface of this optical coupler module.

12. display device as claimed in claim 11, it is characterized in that, this converging module is spectroscope or catoptron.

13. display device as claimed in claim 7, it is characterized in that, the plurality of LASER Light Source at least comprises a red laser, a blue laser and a green laser.