Light source module and scanning display device

Abstract

The utility model discloses a light source module and scanning display device, light source module includes casing and a plurality of light sources, the casing includes the frame, and the lateral surface of frame is provided with the opening, the bearing plate is used for bearing a plurality of light sources, and the bearing plate is embedded in the opening. This module has the advantages such as small, frame and bearing plate can be independent production, easy installation etc. to meet the industrial production demand.

Description

Technical Field

[0001] This utility model relates to the field of projection display, and in particular to a light source module and a scanning display device. Background Technology

[0002] The imaging principle of fiber optic scanning imaging technology is to modulate the light corresponding to each pixel of the image to be displayed by a light source, and then drive the scanning fiber to move at high frequency through a scanner to scan and output the light corresponding to each pixel, thereby projecting the light corresponding to each pixel of the image to be displayed onto the projection screen one by one to form a projected image.

[0003] Laser light sources possess advantages such as good monochromaticity, high brightness, and wide color gamut, and are often used as light sources for fiber optic scanning imaging. Image display is achieved by combining the light from R, G, and B color laser sources. However, designing a laser light source combining structure that makes the overall space of the light source more compact and meets the needs of industrial production is a problem that fiber optic scanning imaging technology needs to solve. Utility Model Content

[0004] The purpose of this invention is to provide a light source module and a scanning display device. This module is small in size, easy to install, and can meet the needs of industrial production.

[0005] To achieve the above-mentioned utility model objectives, the first aspect of this utility model provides a light source module, comprising: a housing and multiple light sources;

[0006] The housing includes a frame with an opening on its side; and a support plate for supporting the plurality of light sources, the support plate being embedded in the opening.

[0007] Optionally, the frame and the support plate are made of different materials;

[0008] Optionally, the support plate is any one of Kovar alloy, ceramic, glass, diamond, and nickel-iron-gallium alloy; the frame is aluminum alloy.

[0009] Optionally, the light source module includes multiple optical elements for light source beam combining, which are disposed at the bottom of the frame; an optical positioning plate is disposed between the optical elements and the bottom of the frame; the thermal stability of the optical positioning plate is greater than that of the frame.

[0010] Optionally, an adhesive layer is provided between the bottom of the frame and the optical positioning plate.

[0011] Optionally, multiple grooves are provided on the bonding surface at the bottom of the frame.

[0012] Optionally, the support plate is made of Kovar alloy; the frame is made of ceramic.

[0013] Optionally, the edge of the support plate and the inner side of the opening of the frame are provided with matching and interlocking toothed splicing structures.

[0014] The second aspect of this utility model provides a scanning display device, including a light source module and an optical fiber scanning module as described in the first aspect. The light emitted from the light source module is scanned and output by the optical fiber scanning module and used as display image light. The optical fiber scanning module includes an actuator. The light-emitting end of the optical fiber in the light source module is fixed on the actuator. The optical fiber extends beyond the actuator and forms an optical fiber cantilever. The optical fiber cantilever is driven by the actuator to sweep in space.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this embodiment of the invention, the light source module includes a housing and multiple light sources. The housing is assembled and includes a frame as a supporting structure and a light source carrier plate for high-precision positioning. An opening is provided on the side of the frame, and the carrier plate is embedded in the opening. This module has advantages such as small size, independent production of the frame and carrier plate, low material cost, easy processing, and easy installation, thus meeting the needs of industrial production. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the light source module provided in an embodiment of the present utility model;

[0019] Figure 2 A schematic diagram of the optical positioning plate provided in an embodiment of this utility model;

[0020] Figure 3 A schematic diagram of the groove provided in an embodiment of this utility model;

[0021] Figure 4 and Figure 5 This is a schematic diagram of the toothed splicing structure provided in an embodiment of the present utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] refer to Figure 1 This utility model provides a light source module, including a housing and multiple light sources; the housing includes a frame 101, and an opening is provided on the side of the frame 101; a support plate 102 is used to support the multiple light sources, and the support plate 102 is embedded in the opening.

[0024] In this embodiment of the invention, the frame 101 and the support plate 102 can be made of different materials. Generally, the materials used for both the frame 101 and the support plate 102 are required to have strong resistance to external interference. As the main material, the frame 101 is also required to have a low price to reduce costs. For the support plate 102, the thermal stability of the support plate 102 is better than that of the frame 101 to ensure the stable performance of devices such as light sources mounted on the support plate 102.

[0025] In one possible implementation, to reduce costs while maintaining manufacturability, the housing is constructed using a splicing method. The frame 101 is made of aluminum alloy, which has advantages such as high hardness, high strength, light weight, die casting capability, and low mass production cost. However, aluminum alloy also has problems such as a high coefficient of thermal expansion, low reliability, and difficulty in welding light sources. Therefore, in this embodiment of the invention, the material shell of the support plate 102 used to support the light source is made of Kovar alloy or other reliable materials, such as alumina ceramic, nitric oxide ceramic, zirconium oxide ceramic, silicon carbide, quartz glass, diamond, nickel-iron-gallium alloy, etc., which makes the module structure simple, small in size, highly reliable, easy to process, and low in cost.

[0026] Considering that aluminum alloy has a large coefficient of thermal expansion and is easily deformed by temperature, causing changes in the relative positions of various components on the optical link, in this embodiment of the invention, such as... Figure 2 As shown, a thermally stable material is laid at the bottom of the aluminum alloy frame as an optical positioning plate 103. The optical positioning plate 103 can be made of materials such as Kovar alloy, ceramics (such as alumina ceramics, zirconia ceramics, aluminum nitride ceramics, silicon carbide ceramics, etc.), glass, etc. Considering weight and cost, alumina ceramics are preferred. Optical components, including lenses, PBS (polarizing beam splitter prisms), pigtails, mirrors, etc., can all be adjusted and fixed on the optical positioning plate 103. Since the optical positioning plate 103 has a small coefficient of thermal expansion, it can ensure that the optical coupling efficiency is less affected by temperature.

[0027] It should be noted that, in this embodiment of the invention, the direction of light emission from the optical fiber is taken as the forward direction. Figure 1 The light source module shown is oriented forward from right to left. The support plate 102 is located on the left side of the frame 101, and the optical positioning plate 103 is located at the bottom of the frame 101. This positional relationship is used in the perspective of each figure in this utility model to illustrate the scheme. However, it should be understood that those skilled in the art can also adjust the position of each optical device according to actual needs, and this utility model does not limit this.

[0028] In this embodiment of the invention, to reduce costs, the bottom of the frame 101 and the optical positioning plate 103 can be directly glued together. However, considering the severe thermal mismatch between the thermally stable optical positioning plate 103 and the aluminum alloy, the adhesive bonding surface may peel off due to thermal expansion and contraction in areas of drastic temperature changes. To mitigate this problem, as... Figure 3 As shown, some surface treatments can be performed on the aluminum alloy bonding surface, such as engraving some grooves. On the one hand, this can act as a buffer for expansion joints due to thermal expansion and contraction, reducing the lateral (which can be considered as the direction parallel to the bonding surface) stress directly acting on the bonding surface, greatly alleviating the possibility of glue peeling off. On the other hand, it increases the wetting of the glue and aluminum alloy, producing a gripping effect and making the bond stronger.

[0029] In the embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the edges of the support plate 102 and the inner sides of the openings of the frame are provided with matching and interlocking toothed splicing structures, similar to mortise and tenon joints. This structure can increase stability when the temperature changes. In other embodiments, mechanical reinforcement methods, such as fixing with screws, can also be used.

[0030] In one possible implementation, the frame 101 can also be made of ceramic materials, such as zirconia ceramic, alumina ceramic, aluminum nitride ceramic, etc. Taking alumina ceramic or toughened alumina ceramic as an example, it has advantages such as low cost, high hardness, high thermal stability, injection molding, low mass production cost, light weight, and thermal conductivity close to Kovar alloy. Zirconia ceramic has the advantage of relatively good drop performance. Toughened alumina ceramic can significantly improve drop reliability. After using a ceramic design for the frame 101, the optical positioning plate can be eliminated, and the optical components can be directly placed at the bottom of the shell. If the shell is made of aluminum nitride ceramic, the thermal conductivity can be further improved, which is especially suitable for AR applications. Based on the above technical solutions, the requirements of high production capacity, high reliability, and low weight can be achieved.

[0031] In this embodiment of the invention, considering the fragile nature of ceramics, protective designs can be implemented at key locations of the shell, such as internal reinforcing ribs. On the exterior of the shell, rounded corners are used, along with edge and corner protection structures. The packaging material can be conventional aluminum alloy (good toughness), silicone, foam, or other conventional materials used for cushioning.

[0032] In this embodiment of the present invention, the light source can be a laser light source, such as a laser diode. The number of light sources in the accompanying drawings is only for illustration, and this embodiment of the present invention does not limit the type and number of light sources.

[0033] Based on the same inventive concept, this utility model embodiment also provides a scanning display device, including the light source module and fiber optic scanning module described in the above embodiments. The light emitted from the light source module is scanned and output by the scanning module to serve as the display image light. The fiber optic scanning module includes an actuator, with the light-emitting end of the fiber optic cable in the light source module fixed to the actuator. The fiber optic cable extends beyond the actuator to form a fiber optic cantilever, which is driven by the actuator to sweep in space. This scanning display device has advantages such as small size and easy installation, making it suitable for various projection devices and widely applicable.

[0034] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0035] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0036] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A light source module, characterized in that, include: Housing and multiple light sources; The housing includes a frame, and an opening is provided on the side of the frame; A support plate is used to support the multiple light sources, and the support plate is embedded in the opening; the frame and the support plate are made of different materials; the thermal stability of the support plate is greater than that of the frame.

2. The light source module as described in claim 1, characterized in that, The support plate is any one of Kovar alloy, ceramic, glass, diamond, and nickel-iron-gallium alloy; the frame is aluminum alloy.

3. The light source module as described in claim 2, characterized in that, The light source module includes multiple optical elements for light source beam combining, which are disposed at the bottom of the frame; an optical positioning plate is disposed between the optical elements and the bottom of the frame; the thermal stability of the optical positioning plate is greater than that of the frame.

4. The light source module as described in claim 3, characterized in that, An adhesive layer is provided between the bottom of the frame and the optical positioning plate.

5. The light source module as described in claim 4, characterized in that, Multiple grooves are provided on the bonding surface at the bottom of the frame.

6. The light source module as described in claim 1, characterized in that, The support plate is made of Kovar alloy; the frame is made of ceramic.

7. The light source module as described in claim 1, characterized in that, The edge of the support plate and the inner side of the opening of the frame are provided with matching and interlocking toothed splicing structures.

8. A scanning display device, characterized in that, Includes a light source module and an optical fiber scanning module as described in any one of claims 1-7, wherein the light emitted from the light source module is scanned and output by the optical fiber scanning module and used as display image light; The fiber scanning module includes an actuator. The light-emitting end of the fiber in the light source module is fixed on the actuator. The fiber extends beyond the actuator and forms a fiber cantilever. The fiber cantilever is driven by the actuator to sweep in space.

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