Lamp strip uniform light-emitting structure for projector and projector
By setting multiple reflective surfaces in the light guide of the projector light strip to extend the light propagation path, the problem of too short light propagation distance in the prior art is solved, and a more uniform light display is achieved, which improves aesthetics and user experience.
Patent Information
- Application Number
- CN202421501022.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The light propagation distance of existing projector light strips is too short, resulting in uneven distances of light propagation in the light guide, resulting in uneven brightness of the light, affecting aesthetics and user experience.
A circular light-emitting structure is designed, and a plurality of reflection surfaces are provided in the light guide member to emit light from the outward surface after being reflected multiple times, extending the propagation path of the light.
The light propagation path is extended, making the projection area larger, and the light on the outgoing surface is more uniform, improving the aesthetics and user experience, and the light guides are easy to install.
Smart Images
Figure CN222672138U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of projectors, in particular to a uniform light-emitting structure of a lamp belt used for a projector and a projector. Background Art
[0002] As the product iteration of projectors becomes faster and faster, some projectors have appeared on the market, which have light strips on the front side of the shell to emit light of various colors, thereby improving the aesthetics of the projector and attracting users.
[0003] Generally speaking, the light from the light strip will be emitted through the light guide, and the user can see the light through the light guide instead of being dazzled by the light from the light strip directly. Existing light strips have LED lamp beads spaced a certain distance apart, and the light-emitting angle of the LED lamp beads is generally 120°. However, due to the unreasonable design of the light guide, the distance that the light from the light strip travels in the light guide is too short, so that the light seen by the user at the light guide is uneven, and it is easy for one part to be brighter than another part. Utility Model Content
[0004] Based on this, the purpose of the present invention is to overcome the deficiencies of the prior art and to provide a light strip uniform light emitting structure for a projector and a projector.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A uniform light emitting structure of a light strip for a projector, comprising:
[0007] A housing, wherein a front side of the housing is provided with an opening;
[0008] A support plate, the support plate is arranged in the shell, and a recessed portion surrounding the opening is formed on the support plate;
[0009] A cover plate, the cover plate is arranged at the opening and is located in front of the support plate, a part of the cover plate, the recess and the inner side of the opening together surround an annular light guide installation space, and the outer periphery of the cover plate is spaced from the inner side of the opening to form an annular light outlet gap;
[0010] An annular light guide, the light guide is installed in the light guide installation space, an annular light strip accommodating space is formed in the light guide, the light guide has a light incident surface, a plurality of reflection surfaces and a light emitting surface, and the light emitting surface is exposed from the light emitting gap;
[0011] An annular light strip is arranged in the light strip accommodating space, and has a plurality of light sources arranged at intervals. Light emitted by the light sources enters the light guide through the light incident surface and is emitted from the light emitting surface after being reflected by a plurality of reflective surfaces.
[0012] As an implementation manner, along the direction from the inside to the outside of the shell, the light guide member forms a structure with multiple bends, and the light emitting surface is closer to the outside of the shell than the light incident surface.
[0013] As an implementation manner, an embedding groove is provided on the light guide member, and a fixing convex edge embedded in the embedding groove is provided on the rear side of the cover plate.
[0014] As an embodiment, a shading rib is further provided on the rear side of the cover plate, the shading rib is located on the side of the light guide facing the interior of the shell, and the shading rib abuts against the support plate, and the shading rib is used to block the light propagating from the light guide toward the interior of the shell.
[0015] As an implementation manner, a groove matched with the shading rib is provided on the support plate, and the shading rib is embedded in the groove.
[0016] As an embodiment, the light guide member includes a first light guide segment, a second light guide segment, a third light guide segment, a fourth light guide segment and a fifth light guide segment which are sequentially connected along a direction from the inside to the outside of the shell, the first light guide segment, the second light guide segment and the third light guide segment enclose the light strip accommodating space, the light strip accommodating space faces the rear side of the shell, the third light guide segment, the fourth light guide segment and the fifth light guide segment enclose the embedding groove, and the embedding groove faces the front side of the shell.
[0017] As an implementation manner, the light incident surface and the light emitting surface are both glossy surfaces.
[0018] As an implementation manner, except for the light incident surface, the plurality of reflection surfaces and the light emitting surface, the remaining surfaces of the light guide member are sun-textured exposed surfaces.
[0019] As an implementation manner, the support plate is detachably connected to the shell.
[0020] A projector of the present application includes the above-mentioned uniform light-emitting structure of the light strip for the projector.
[0021] The light emitted by the light source of the light strip of the present application is reflected multiple times by the light guide and then emitted from the light emitting surface, thereby extending the propagation path of the light. The propagation path length of the light in this embodiment is four times that of the prior art, which is equivalent to extending the emission distance of the light source, making the projection area larger, so that the light can be evenly displayed on the light emitting surface, which is conducive to improving the aesthetics and user experience. In addition, through the above arrangement, the light guide is easy to install. It only needs to be placed in the recess of the light guide first, and then covered with the cover plate, so that the light guide can be fixed in the light guide installation space.
[0022] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic diagram of the structure of the uniform light-emitting structure of the light strip in the embodiment of the present application;
[0024] Figure 2 This is a schematic diagram of the exploded structure of the uniform light-emitting structure of the light strip in the embodiment of the present application;
[0025] Figure 3 This is a partially enlarged schematic cross-sectional view of the uniform light-emitting structure of the light strip in the embodiment of the present application (the light strip is not installed);
[0026] Figure 4 This is a partially enlarged schematic cross-sectional view of the uniform light-emitting structure of the light strip in the embodiment of the present application (after the light strip is installed);
[0027] Figure 5 Schematic diagram of the cross-sectional structure of the light guide in the embodiment of the present application;
[0028] Description of reference numerals:
[0029] 1. Shell; 11. Opening; 12. Light emitting gap; 13. Light guide installation space; 2. Support plate; 21. Recess; 22. Groove; 3. Cover plate; 31. Fixed convex edge; 32. Shading rib; 4. Light guide; 41. Light strip accommodating space; 42. Light incident surface; 43. Reflection surface; 44. Light emitting surface; 45. Fitting groove; 401. First light guide segment; 402. Second light guide segment; 403. Third light guide segment; 404. Fourth light guide segment; 405. Fifth light guide segment; 5. Light strip; 51. Light source. DETAILED DESCRIPTION
[0030] To further illustrate each embodiment, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention.
[0031] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0032] See also Figures 1 to 5 This embodiment provides a uniform light emitting structure of a light strip for a projector, including a housing 1, a support plate 2, a cover plate 3, a light guide 4 and a light strip 5.
[0033] The housing 1 may be used to accommodate various components of the projector, such as an optical engine, a cooling fan, etc. In this embodiment, an opening 11 is provided on the front side of the housing 1, and various components may be installed into the housing 1 through the opening 11.
[0034] The support plate 2 is disposed in the housing 1, and a recess 21 is formed on the support plate 2 and is disposed around the opening 11, and the recess 21 is close to the inner side of the opening 11. The cover plate 3 is disposed at the opening 11 and is located in front of the support plate 2, and the cover plate 3 serves as a shield and decoration, and has a plurality of ventilation holes and sound outlet holes for heat dissipation and sound generation.
[0035] Among them, a part of the cover plate 3, the recess 21 and the inner side of the opening 11 together enclose an annular light guide installation space 13, and the outer periphery of the cover plate 3 is spaced from the inner side of the opening 11 to form an annular light outlet gap 12. It can be understood that the light guide installation space 13 can be connected to the outside through the light outlet gap 12.
[0036] The light guide 4 is used to guide light, and the light guide 4 is an annular structure, and the light guide 4 is installed in the light guide installation space 13. The light guide 4 has a light incident surface 42, a plurality of reflection surfaces 43, and a light emitting surface 44, and the light emitting surface 44 is exposed from the light emitting slit 12, that is, the light emitted from the light emitting surface 44 can be seen from the light emitting slit 12.
[0037] The light guide 4 is formed with an annular light strip accommodating space 41, the light strip 5 is an annular structure, and the light strip 5 is arranged in the light strip accommodating space 41. The light strip 5 has a plurality of light sources 51 arranged at intervals, and the light sources 51 are LED lamp beads. In this embodiment, the light emitted by the light source 51 enters the light guide 4 through the light incident surface 42, and is reflected by the plurality of reflection surfaces 43 and then emitted from the light emitting surface 44.
[0038] By adopting the above technical solution, such as Figure 4 As shown, the small arrow is the propagation path of the light in the light guide 4. The light emitted by the light source 51 of the light strip 5 of this embodiment is reflected multiple times by the light guide 4 and then emitted from the light emitting surface 44, thereby extending the propagation path of the light. The propagation path length of the light in this embodiment is four times that of the prior art, which is equivalent to extending the emission distance of the light source 51, so that the projection area becomes larger, so that the light can be evenly displayed on the light emitting surface 44, which is conducive to improving the aesthetics and user experience. In addition, through the above arrangement, the light guide 4 is easy to install. It only needs to be placed in the recess 21 of the light guide 4 first, and then the cover plate 3 is covered, so that the light guide 4 can be fixed in the light guide installation space 13.
[0039] In order to better fix the light guide 4, preferably, the light guide 4 is provided with an embedding groove 45, and the rear side of the cover plate 3 is provided with a fixing convex edge 31 embedded in the embedding groove 45. Therefore, when the cover plate 3 is covered on the opening 11, the fixing convex edge 31 can be embedded in the embedding groove 45, so that the light guide 4 is better fixed.
[0040] Since part of the light will be transmitted from other surfaces of the light guide 4 when transmitting light, and although the cover plate 3 and the support plate 2 enclose the light guide installation space 13, there is still a gap between the cover plate 3 and the support plate 2. Therefore, the light transmitted from other surfaces of the light guide 4 will pass through the gap and enter the position inside the shell 1, which will cause light leakage. The user can see the leaked light from the ventilation holes or sound holes on the cover plate 3, which may reduce the user experience. Therefore, preferably, in this embodiment, the rear side of the cover plate 3 is also provided with a shading rib 32, and the shading rib 32 is located on the side of the light guide 4 facing the inside of the shell 1, and the shading rib 32 abuts against the support plate 2, and the shading rib 32 is used to block the light propagating from the light guide 4 toward the inside of the shell 1. By such a configuration, the occurrence of light leakage can be avoided.
[0041] Furthermore, the support plate 2 is provided with a groove 22 matched with the shading rib 32, and the shading rib 32 is embedded in the groove 22. By embedding the shading rib 32 in the groove 22, a better shading effect can be achieved.
[0042] Preferably, in this embodiment, along the direction from the inside to the outside of the shell 1, the light guide 4 forms a structure with multiple bends, and the light output surface 44 is closer to the outside of the shell 1 than the light incident surface 42, thereby allowing the light to be fully reflected in the light guide 4 and extend the light propagation path.
[0043] Specifically, in the present embodiment, the light guide 4 comprises a first light guide segment 401, a second light guide segment 402, a third light guide segment 403, a fourth light guide segment 404 and a fifth light guide segment 405 which are sequentially connected along the direction from the inside to the outside of the housing 1, and the first light guide segment 401, the second light guide segment 402, the third light guide segment 403, the fourth light guide segment 404 and the fifth light guide segment 405 are sequentially connected to form a wave-like structure, wherein the first light guide segment 401, the second light guide segment 402 and the third light guide segment 403 surround the light strip accommodating space 41, the light strip accommodating space 41 faces the rear side of the housing 1, and the third light guide segment 403, the fourth light guide segment 404 and the fifth light guide segment 405 surround the embedding groove 45, and the embedding groove 45 faces the front side of the housing 1. The light guide 4 configured in this way can fully extend the light propagation path, so that the light displayed by the light emitting surface 44 is more uniform.
[0044] Preferably, the light incident surface 42 and the light emitting surface 44 are both light surfaces, which can reduce the loss of incident and emitted light. Specifically, the light incident surface 42 is the side of the first light guide segment 401 facing the outside of the housing 1, and the light emitting surface 44 is the side of the fifth light guide segment 405 facing the front side of the housing 1.
[0045] Preferably, except for the light incident surface 42, the multiple reflective surfaces 43 and the light emitting surface 44, the remaining surfaces of the light guide 4 are all sun-textured exposed surfaces, so as to fully intercept and scatter the light, so that the light can be more transmitted in the light guide 4. The multiple reflective surfaces 43 are respectively arranged on the partial surface of the first light guide segment 401 facing the front side of the housing 1, the surface of the connection between the first light guide segment 401 and the second light guide segment 402, the surface of the connection between the second light guide segment 402 and the third light guide segment 403, the surface of the connection between the third light guide segment 403 and the fourth light guide segment 404, and the surface of the connection between the fourth light guide segment 404 and the fifth light guide segment 405.
[0046] Preferably, the support plate 2 is detachably connected to the housing 1 to facilitate disassembly and assembly.
[0047] This embodiment further provides a projector, which includes the uniform light emitting structure of the lamp strip used for the projector in this embodiment. Therefore, it has the beneficial effects of the uniform light emitting structure of the lamp strip in this embodiment, which will not be elaborated here.
[0048] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model manual self-centering vise. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A uniform light emitting structure of a light strip for a projector, characterized in that: include: A housing, wherein a front side of the housing is provided with an opening; A support plate, the support plate is arranged in the shell, and a recessed portion surrounding the opening is formed on the support plate; A cover plate, the cover plate is arranged at the opening and is located in front of the support plate, a part of the cover plate, the recess and the inner side of the opening together surround an annular light guide installation space, and the outer periphery of the cover plate is spaced from the inner side of the opening to form an annular light outlet gap; An annular light guide, the light guide is installed in the light guide installation space, an annular light strip accommodating space is formed in the light guide, the light guide has a light incident surface, a plurality of reflection surfaces and a light emitting surface, and the light emitting surface is exposed from the light emitting gap; An annular light strip is arranged in the light strip accommodating space, and has a plurality of light sources arranged at intervals. Light emitted by the light sources enters the light guide through the light incident surface and is emitted from the light emitting surface after being reflected by a plurality of reflective surfaces.
2. The uniform light emitting structure of a light strip for a projector according to claim 1, characterized in that: Along the direction from the inside to the outside of the housing, the light guide member forms a structure with multiple bends, and the light emitting surface is closer to the outside of the housing than the light incident surface.
3. The uniform light emitting structure of a light strip for a projector according to claim 2, characterized in that: The light guide is provided with an embedding groove, and the rear side of the cover is provided with a fixing convex edge embedded in the embedding groove.
4. The uniform light emitting structure of a light strip for a projector according to claim 1, characterized in that: A shading rib is also provided on the rear side of the cover plate. The shading rib is located on the side of the light guide member facing the interior of the shell, and the shading rib abuts against the support plate. The shading rib is used to block light propagating from the light guide member toward the interior of the shell.
5. The uniform light emitting structure of a light strip for a projector according to claim 4, characterized in that: The support plate is provided with a groove matched with the shading rib, and the shading rib is embedded in the groove.
6. The uniform light emitting structure of a light strip for a projector according to claim 3, characterized in that: The light guide member includes a first light guide segment, a second light guide segment, a third light guide segment, a fourth light guide segment and a fifth light guide segment which are sequentially connected along a direction from the inside to the outside of the shell; the first light guide segment, the second light guide segment and the third light guide segment enclose a light strip accommodating space, the light strip accommodating space faces the rear side of the shell; the third light guide segment, the fourth light guide segment and the fifth light guide segment enclose an embedding groove, and the embedding groove faces the front side of the shell.
7. The uniform light emitting structure of a light strip for a projector according to any one of claims 1 to 6, characterized in that: The light incident surface and the light emitting surface are both glossy surfaces.
8. The uniform light emitting structure of a light strip for a projector according to claim 7, characterized in that: Except for the light incident surface, the plurality of reflection surfaces and the light emitting surface, the remaining surfaces of the light guide member are sun-textured exposed surfaces.
9. The uniform light emitting structure of a light strip for a projector according to claim 1, characterized in that: The support plate is detachably connected to the shell.
10. A projector, characterized in that: include: The uniform light emitting structure of a light strip for a projector as described in any one of claims 1 to 9.