A projection device
By isolating the beam splitting component from the display control chip and the light source component in the projection device and using the heat exchange component inside the housing for heat dissipation, the problem of heat accumulation in the filter component is solved, achieving a compact structure and stable and reliable operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONG SHAN SK-OPTECH CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-07
AI Technical Summary
In existing projection devices, the heat buildup in the filter components causes the display control chip to overheat, resulting in unstable operation and even potential burnout.
The beam splitter is isolated from the display control chip and the light source assembly. Some light is reflected to the display control chip, while some light passes through the beam splitter and is emitted, thus avoiding direct heat conduction to the display control chip. Heat dissipation is achieved in conjunction with the heat exchange components inside the housing.
This improves the structural compactness and operational stability of the projection device, reduces the heat generation of the beam splitting component, prevents heat conduction to the display control chip, and ensures the long-term reliable operation of the device.
Smart Images
Figure CN224471944U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of projection equipment technology, and in particular to a projection device. Background Technology
[0002] Existing projection devices typically include a light source assembly, a filter assembly, and a display control chip arranged sequentially along the light path. The light emitted by the light source assembly illuminates the filter assembly, which can isolate and filter out some of the light, while the remaining light passes through to the display control chip. The display control chip modulates the light to output a projected pattern.
[0003] The light filter is usually set directly on the display control chip. When the light filter isolates and filters out some light, it usually does so by reflecting or absorbing the light. In either case, the light filter will generate heat, which will be conducted to the display control chip. Long-term operation will cause the display control chip to overheat, become unstable, or even burn out. Utility Model Content
[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a projection device with a compact structure and stable and reliable operation.
[0005] A projection device according to a first aspect of the present invention includes: a housing having an inner cavity and a light outlet; a light source assembly disposed in the housing and located in the inner cavity; a display control chip disposed in the housing and located in the inner cavity, the emitting end of the display control chip being correspondingly disposed to the light outlet; and a beam splitter disposed in the housing and located in the inner cavity, the beam splitter being disposed separately from the display control chip and the light source assembly, the beam splitter including a reflective surface and an emitting surface, the reflective surface facing the incident ends of the light source assembly and the display control chip, wherein the light source assembly outputs light towards the reflective surface, a portion of the light irradiating the reflective surface is reflected and output to the incident end of the display control chip, and a portion of the light irradiating the reflective surface passes through the beam splitter and is emitted from the emitting surface.
[0006] A projection device according to an embodiment of the present utility model has at least the following beneficial effects:
[0007] In this projection device, during operation, the light source component emits light that shines on the reflective surface of the beam splitter component. Some of the light is reflected by the reflective surface and output to the incident end of the display control chip. The display control chip modulates the light and outputs it through the output end, thus projecting a pattern to the outside world. The remaining light passes through the beam splitter component and exits through the output surface without being absorbed by the beam splitter component. Although the beam splitter component generates some heat, it is much less than the heat generated by absorbing light. Furthermore, the beam splitter component does not come into contact with the light source component or the display control chip, so heat is not easily conducted to the display control chip. This design optimizes heat dissipation while ensuring a compact structure and stable and reliable operation.
[0008] According to some embodiments of the present invention, the beam splitting assembly includes beam splitting lenses and a glass carrier sheet stacked on top of each other, with the surfaces of the beam splitting lenses facing away from the glass carrier sheet respectively facing the incident ends of the light source assembly and the display control chip.
[0009] According to some embodiments of the present invention, the emission surface of the beam-splitting component faces the inner wall surface of the housing.
[0010] According to some embodiments of the present invention, the housing is provided with a first heat exchanger, and the emission surface of the beam splitter faces the first heat exchanger.
[0011] According to some embodiments of the present invention, the incident angle of the light source component toward the reflective surface is 45°, and the exit angle of the reflective surface toward the incident end of the display control chip is 45°.
[0012] According to some embodiments of the present invention, the light source assembly includes a light-emitting element and a light lens, the light-emitting element being disposed toward the light lens, the light lens being used to process the light emitted by the light-emitting element into parallel light rays, and the light lens being disposed toward the reflective surface.
[0013] According to some embodiments of the present invention, the housing is provided with a second heat exchanger, which is in thermal contact with the beam splitter.
[0014] According to some embodiments of the present invention, the projection device further includes an imaging lens group, which is disposed at the light outlet of the housing, and the emitting end of the display control chip corresponds to the imaging lens group.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0017] Figure 1 This is a perspective view of one embodiment of the projection device of this utility model;
[0018] Figure 2 This is a schematic diagram of the internal structure of one embodiment of the projection device of this utility model;
[0019] Figure 3 This is a schematic diagram of the optical path of one embodiment of the projection device of this utility model.
[0020] Figure label:
[0021] Housing 100; inner cavity 110; light outlet 120; light source assembly 200; light-emitting element 210; light lens 220; display control chip 300; beam splitting assembly 400; reflective surface 410; emission surface 420; imaging lens group 500; first heat exchanger 600. Detailed Implementation
[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0023] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] like Figures 1 to 3 As shown, a projection device according to a first aspect embodiment of the present invention includes a housing 100, a light source assembly 200, a display control chip 300, and a beam splitter assembly 400. The housing 100 has an inner cavity 110 and a light outlet 120. The light source assembly 200 is disposed in the housing 100 and located in the inner cavity 110. The display control chip 300 is disposed in the housing 100 and located in the inner cavity 110, with its emission end corresponding to the light outlet 120. The beam splitter assembly 400 is disposed in the housing 100 and located in the inner cavity 110. The beam splitter 400 is disposed separately from the display control chip 300 and the light source assembly 200. The beam splitter 400 includes a reflective surface 410 and an emission surface 420. The reflective surface 410 faces the incident ends of the light source assembly 200 and the display control chip 300, respectively. The light source assembly 200 outputs light towards the reflective surface 410. Part of the light that irradiates the reflective surface 410 is reflected and output to the incident end of the display control chip 300. Part of the light that irradiates the reflective surface 410 passes through the beam splitter 400 and is emitted from the emission surface 420.
[0027] The housing 100 can be made of opaque material and can be rectangular, cylindrical or elliptical cylindrical. The light source assembly 200 can be set on the inner peripheral wall of the housing 100, and the light outlet 120 can be located at the end of the housing 100, making compact use of the internal space and making the projection device smaller.
[0028] The display control chip 300 can be an LCOS projection chip or an LCD chip. The light emitted by the light source assembly 200 is processed by the display control chip 300 to form an image. In some embodiments of this invention, the projection device further includes an imaging lens group 500, which is disposed at the light outlet 120 of the housing 100. The emitting end of the display control chip 300 corresponds to the imaging lens group 500. The imaging lens group 500 can be composed of one or more of convex lenses or multiple concave lenses. The pattern light emitted from the emitting end of the display control chip 300 is magnified by the imaging lens group 500 and forms a light spot pattern on the ground after exiting the light outlet 120.
[0029] In this projection device, during operation, the light source component 200 emits light that shines on the reflective surface 410 of the beam splitter component 400. Some of the light is reflected by the reflective surface 410 and output to the incident end of the display control chip 300. The display control chip 300 modulates the light and outputs it through the output end, thus projecting a pattern to the outside world through the light outlet 120. The remaining light passes through the beam splitter component 400 and is emitted from the output surface 420, without being absorbed by the beam splitter component 400. Although the beam splitter component 400 generates some heat, it is much less than the heat generated by absorbing light. Furthermore, the beam splitter component 400 is not in contact with the light source component 200 or the display control chip 300, so heat is not easily conducted to the display control chip 300. This design optimizes heat dissipation while ensuring a compact structure and stable and reliable operation.
[0030] In some embodiments of this utility model, the beam splitting component 400 includes beam splitting lenses and a glass carrier sheet (not shown in the figure) stacked on top of each other, with the surfaces of the beam splitting lenses facing away from the glass carrier sheet facing the incident ends of the light source component 200 and the display control chip 300, respectively.
[0031] The beam splitter also has a reflecting surface 410 and an emitting surface 420. The emitting surface 420 of the beam splitter is attached to the glass support sheet, which provides support for the beam splitter and allows heat from the beam splitter to dissipate. Specifically, the beam splitter is thinner than the glass support sheet, with a thickness of approximately 0.1 mm to 0.3 mm, while the thickness of the glass support sheet is approximately 0.5 mm to 0.8 mm.
[0032] Specifically, the beam splitting component 400 can also be a polarizing beam splitter prism, a metal wire grid, a glass wire grid, etc.
[0033] In some embodiments of this utility model, such as Figure 3As shown, the emission surface 420 of the beam splitting component 400 faces the inner wall of the housing 100 and does not irradiate the display control chip 300. The housing 100 can be made of alloy material with good thermal conductivity, and the entire housing 100 can dissipate heat.
[0034] In some embodiments of this utility model, the housing 100 may also be made of resin material. The housing 100 is provided with a first heat exchanger 600. The emission surface 420 of the beam splitter 400 faces the first heat exchanger 600. The first heat exchanger 600 may be made of alloy material. According to the relative position of the light source assembly 200 and the beam splitter 400, the position where the light emitted from the emission surface 420 of the beam splitter 400 is projected onto the inner wall of the housing 100 can be determined. An opening is made at this position, and the first heat exchanger 600 is provided. The light is projected onto the first heat exchanger 600, causing the first heat exchanger 600 to accumulate heat. The first heat exchanger 600 can contact the outside air, allowing the heat to dissipate quickly.
[0035] In some embodiments of this utility model, such as Figure 3 As shown, the incident angle of the light emitted by the light source assembly 200 toward the reflective surface 410 is 45°, and the exit angle of the reflective surface 410 toward the incident end of the display control chip 300 is 45°.
[0036] The light source assembly 200 illuminates the reflective surface 410 at a 45° angle. Part of the light is reflected at a 45° angle and emitted to the display control chip 300. The remaining light can pass through the beam splitting assembly 400 in a straight line and be projected onto the inner wall of the housing 100 or the first heat exchanger 600.
[0037] In some embodiments of this utility model, the light source assembly 200 includes a light-emitting element 210 and a light lens 220. The light-emitting element 210 is disposed toward the light lens 220, and the light lens 220 is used to process the light emitted by the light-emitting element 210 into parallel light. The light lens 220 is disposed toward the reflective surface 410.
[0038] Specifically, the light-emitting element 210 can be selected from conventional LED projection elements, and the light lens 220 can be a convex lens. The light-emitting element 210 is usually a point light source that emits light. The light-emitting element 210 is located at the focal point of the light lens 220 and emits light towards the light lens 220. The light lens 220 can process the light to form parallel light. The parallel light is reflected by the beam splitter 400 and output to the display control chip 300 in the form of parallel light.
[0039] In some embodiments of this utility model, the housing 100 is provided with a second heat exchanger (not shown in the figure), the second heat exchanger is in thermal contact with the beam splitting component 400, and the second heat exchanger can be made of alloy material. When the beam splitting component 400 is installed, the two ends of the beam splitting component 400 at the reflecting surface 410 or the emitting surface 420 are connected to the inner wall of the housing 100, and the second heat exchanger can be set at the connection position of the housing 100. The second heat exchanger can contact the end of the beam splitting component 400, and the heat of the beam splitting component 400 can be transferred to the second heat exchanger.
[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A projection device, characterized in that, include: The housing has an inner cavity and a light outlet. A light source assembly is disposed in the housing and located within the inner cavity; A display control chip is disposed in the housing and located in the inner cavity, and the emitting end of the display control chip is correspondingly disposed with the light emitting port; A beam splitter is disposed in the housing and located in the inner cavity. The beam splitter is disposed separately from the display control chip and the light source assembly. The beam splitter includes a reflective surface and an emission surface. The reflective surface faces the incident ends of the light source assembly and the display control chip, respectively. The light source assembly outputs light towards the reflective surface. Part of the light illuminating the reflective surface is reflected and output to the incident end of the display control chip. Part of the light illuminating the reflective surface passes through the beam splitter and is emitted from the emission surface.
2. The projection device according to claim 1, characterized in that: The beam splitting assembly includes beam splitting lenses and a glass carrier sheet stacked on top of each other. The surfaces of the beam splitting lenses facing away from the glass carrier sheet are respectively facing the incident ends of the light source assembly and the display control chip.
3. The projection device according to claim 1, characterized in that: The emission surface of the beam-splitting component faces the inner wall of the housing.
4. The projection device according to claim 1, characterized in that: The housing is provided with a first heat exchanger, and the emission surface of the beam splitter faces the first heat exchanger.
5. A projection device according to claim 1, characterized in that: The incident angle of the light emitted by the light source assembly toward the reflective surface is 45°, and the exit angle of the light emitted by the reflective surface toward the incident end of the display control chip is 45°.
6. A projection device according to claim 1, characterized in that: The light source assembly includes a light-emitting element and a light lens. The light-emitting element is positioned facing the light lens, and the light lens is used to process the light emitted by the light-emitting element into parallel light rays. The light lens is positioned facing the reflective surface.
7. A projection device according to claim 1, characterized in that, The housing is provided with a second heat exchanger, which is in thermal contact with the beam splitter.
8. A projection device according to claim 1, characterized in that, It also includes an imaging lens group, which is disposed at the light outlet of the housing, and the emitting end of the display control chip corresponds to the imaging lens group.