Patent Application
20240036449
This application claims the priority benefit of China application (No. 202210908517.5), filed on Jul. 29, 2022. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
The disclosure relates to a light source module, and more particularly to a light source module applicable to a projection device and including a heat dissipation assembly, and a projection device including the light source module.
With the market requirements for brightness, color saturation, service life, non-toxic environmental protection, etc of projection apparatus, the types of light sources used in the projection apparatus have evolved from UHP lamps, light emitting diode (LED) to laser diode (LD).
The light source may generate a lot of heat energy during operation, thus, a heat dissipation module and a fan are usually arranged in the projection device to dissipate heat from the light source. The conventional heat dissipation module includes a plurality of heat dissipation fin set and heat pipes respectively connected to the heat dissipation fin set to improve heat dissipation efficiency. In addition, some projection devices are equipped with a plurality of light sources with different emission wavelengths to improve image quality. However, limited by the optical path design in the projection device, the position of each light source cannot be easily changed, and the position of the heat dissipation fin set can only correspond to the respective light source. Therefore, the configuration of the heat dissipation fin set is quite limited in the projection device, which makes it difficult to significantly improve the overall heat dissipation efficiency of the projection device.
The information disclosed in this “BACKGROUND” section is only for enhancement understanding of the background and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Furthermore, the information disclosed in this “BACKGROUND” section does not mean that one or more problems to be solved by one or more embodiments of the disclosure were acknowledged by a person of ordinary skill in the art.
The disclosure provides a light source module to improve heat dissipation efficiency.
The disclosure provides a projection device to improve image quality and durability.
Other advantages and objectives of the disclosure may be further illustrated by the technical features broadly embodied and described as follows.
In order to achieve one or a portion of or all of the objectives or other objectives, the light source module provided by the disclosure is applicable to a projection device and includes a heat dissipation assembly, a first light source, and a second light source. The heat dissipation assembly includes a first heat dissipation component and a second heat dissipation component. The first heat dissipation component includes a first base and a first fin set connected with each other. The first fin set has a first ventilation surface. The second heat dissipation component includes a second base and a second fin set. The second base has a first surface, a second surface, and a ventilation opening. The first surface is opposite to the second surface. The second fin set is arranged on the first surface. The second surface faces the first ventilation surface. The ventilation opening penetrates the first surface and the second surface and is aligned with the first ventilation surface. The first light source is arranged on the first base. The second light source is arranged on the second base.
In order to achieve one or a portion of or all of the objectives or other objectives, the projection device provided by the disclosure includes a housing, the aforementioned light source module, a light valve module, and a projection lens. The light source module, the light valve module, and the projection lens are arranged in the housing. The housing has a ventilation hole. The light source module is configured to provide an illumination beam. The light valve module is arranged on a transmission path of the illumination beam and configured to convert the illumination beam into an image beam. The projection lens is arranged on a transmission path of the image beam and configured to project the image beam.
In an embodiment of the disclosure, the aforementioned light source module may further include the third light source described above. The heat dissipation assembly further includes the third heat dissipation component.
In the light source module of the embodiment of the disclosure, the second heat dissipation component adopts a second base having a ventilation opening, and the ventilation opening is aligned with the first ventilation surface of the first fin set. Therefore, the airflow generated by the fan can still flow through the first heat dissipation component and the second heat dissipation component through the ventilation opening even when the first heat dissipation component and the second heat dissipation component cannot be configured in the same ventilation direction. Based on the above, the light source module of the disclosure can improve the heat dissipation efficiency without changing the existing conditions such as the optical path design and the fan flow field. By adopting the light source module, the projection device of the embodiment of the disclosure can have good image quality and durability.
Other objectives, features, and advantages of the disclosure will be further understood from the further technological features disclosed by the embodiments of the disclosure wherein there are shown and described preferred embodiments of this disclosure, simply by way of illustration of modes best suited to carry out the disclosure.
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure.
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the disclosure may be practiced. In this regard, directional terminology, such as “top”, “bottom”, “front”, “back”, etc., is used with reference to the orientation of the Figure(s) being described. The components of the disclosure can be positioned in a number of different orientations. As such, the directional terminology is used for purposes of illustration and is in no way limiting. On the other hand, the drawings are only schematic and the sizes of components may be exaggerated for clarity. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the disclosure. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of “including”, “comprising”, or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless limited otherwise, the terms “connected”, “coupled”, and “mounted” and variations thereof herein are used broadly and encompass direct and indirect connections, couplings, and mountings. Similarly, the terms “facing”, “faces”, and variations thereof herein are used broadly and encompass direct and indirect facing, and “adjacent to” and variations thereof herein are used broadly and encompass directly and indirectly “adjacent to”. Therefore, the description of “A” component facing “B” component herein may contain the situations that “A” component facing “B” component directly or one or more additional components is between “A” component and “B” component. Also, the description of “A” component “adjacent to” “B” component herein may contain the situations that “A” component is directly “adjacent to” “B” component or one or more additional components is between “A” component and “B” component. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.
The heat dissipation assembly 110 is configured to reduce the temperature of the first light source 120 and the second light source 130. The heat dissipation assembly 110 is a heat-pipe-free structure in this embodiment. That is, the first heat dissipation component 111 and the second heat dissipation component 112 are, for example, heat-pipe-free heat dissipation components, which can reduce the volume size and cost of the heat dissipation assembly 110. The ventilation opening O of the second heat dissipation component 112 of this embodiment can be formed on the second base 1120 by computer numerical control (CNC) machining. It is understood that the opening area of the ventilation opening O can be set according to actual needs. For example, the opening area of the ventilation opening O may be slightly smaller than the area of the first ventilation surface AS1, as shown in
Refer to
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The first light source 120 and the second light source 130 have different light-emitting wavelengths and colors. For example, the first light source 120 is configured to generate a first beam B1, and the second light source 130 is configured to generate a second beam B2, wherein the wavelength of the first beam B1 and the wavelength of the second beam B2 are different from each other. The detailed features of the first beam B1 and the second beam B2 will be described in the subsequent paragraphs. Similarly, the detailed features of the first light source 120 and the second light source 130 are also described in the subsequent paragraphs.
Further, the light source module 100 of this embodiment may further include a third light source 140. The heat dissipation assembly 110 further includes, for example, a third heat dissipation component 114, and the third heat dissipation component 114 is opposite to the first heat dissipation component 111. The third heat dissipation component 114 includes a third base 1140 and a third fin set 1141. The third base 1140 has a third surface S3 and a fourth surface S4 opposite to each other. The third fin set 1141 is arranged on the third surface S3. The fourth surface S4 faces the surface S of the first base 1110 arranged the first light source 120. The third light source 140 is arranged on the fourth surface S4. In detail, the third light source 140 is configured to generate a third beam B3, wherein the wavelength of the third beam B3 is different from that of the second beam B2. The detailed features of the third beam B3 will be described in subsequent paragraphs. In this embodiment, the third heat dissipation component 114 may be a heat-pipe-free dissipation component to further reduce the volume and cost of the heat dissipation assembly 110. Please refer to
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Further, the light source module 100 of this embodiment further includes, for example, a fourth light source 160. The fourth light source 160 is arranged on the fourth surface S4. The fourth light source 160 is configured to generate a fourth beam B4. The first dichroic component 151 is further arranged on the transmission path of the third beam B3. The light guide assembly 150 may further include a second dichroic component 152. The second dichroic component 152 is arranged on the transmission path of the converted beam TB, the second beam B2, the third beam B3 and the fourth beam B4. The first dichroic component 151 is configured to reflect the third beam B3 to the second dichroic component 152 and reflect the first beam B1 to the wavelength conversion layer W. The second dichroic component 152 is configured to allow the converted beam TB, the second beam B2, and the third beam B3 to pass therethrough and reflect the fourth beam B4. Thus, the first beam B1, the converted beam TB, the second beam B2, the third beam B3 and the fourth beam B4 can be emitted from the light guide assembly 150. The fourth beam B4 of this embodiment is, for example, a red beam. The second dichroic component 152 may reflect the red beam and allow the blue beam (i.e., the third beam B3) and the green beam (i.e., the converted beam TB and the second beam B2) to pass therethrough, so that the aforementioned red beam, blue beam and green beam can exit from the light guide assembly 150. Similarly, the second dichroic component 152 may be a dichroic mirror, but the disclosure is not limited thereto. Other detailed features of the fourth light source 160 of this embodiment are described in subsequent paragraphs.
Compared with the prior art, in the light source module 100 of this embodiment, the second heat dissipation component 112 adopts a second base 1120 having a ventilation opening O, and the ventilation opening O is aligned with the first ventilation surface AS1 of the first fin set 1111. Thus, the airflow A generated by the fan 113 can flow through the first fin set 1111 through the ventilation opening O. Based on the above, the light source module 100 of this embodiment can improve the heat dissipation efficiency without changing the existing conditions such as the optical path design and the flow field of the fan 113.
Further, the first deflector 170 may cover the second ventilation surface AS2 to further reduce the airflow flowing from the second ventilation surface AS2. Similarly, the second deflector 180 may cover the fifth ventilation surface AS5 to further reduce the airflow flowing from the fifth ventilation surface AS5. Referring to the third heat dissipation assembly 114 of
The housing 210 of this embodiment may further have a ventilation hole H2, and the ventilation holes H1 and H2 are communicated with each other. Specifically, the airflow A generated by the fan 113 may flow into the housing 210 through the ventilation hole H2 (e.g., an air inlet) and exit the housing 210 from the ventilation hole H1 (e.g., an air outlet). It is understood that the shape of the housing 210 shown in
As previously described, in the light source module 100 of this embodiment, the first dichroic component 151 of the light guide assembly 150 may reflect the first beam B1 and the third beam B3 generated by the third light source 140 and allow the converted beam TB to pass therethrough. Further, the second dichroic component 152 of the light guide assembly 150 may reflect the fourth beam B4 generated by the fourth light source 160 and allow the second beam B2, the third beam B3 and the converted beam TB to pass therethrough. Thus, the illumination beam L1 of this embodiment includes at least one of the second beam B2, the third beam B3, the fourth beam B4 and the converted beam TB. After the illumination beam L1 is emitted from the light guide assembly 150, the illumination beam L1 may be reflected to the light valve module 220 by the reflective element R. In this embodiment, the first beam B1 is a blue laser beam, the second beam B2 is a green beam, the third beam B3 is a blue beam, the fourth beam B4 is a red beam, and the converted beam TB is a green beam.
Incidentally, the first light source 120, the second light source 130, the third light source 140 and the fourth light source 160 in this embodiment may be light-emitting diodes or laser diodes. Further, the number of light-emitting diodes or laser diodes may be one or more. For example, the light-emitting diodes (or laser diodes) may be arranged into a matrix when the number of light-emitting diodes (or laser diodes) is plural.
The light valve module 220 of this embodiment includes, for example, a digital micromirror device (DMD), but other embodiments are not limited thereto. For example, the optical valve module 220 in one embodiment may include a liquid crystal on silicon (LCoS) or a liquid crystal display (LCD). Further, the disclosure does not limit the number of light valve modules 220. For example, the projection device 200 in one embodiment can adopt a single-chip liquid crystal display panel or three-chip liquid crystal display panel structure, but the disclosure is not limited thereto. Taking a light valve module 220 as an example, the light valve module 220 may further include a fourth heat dissipation fin set, and the fourth heat dissipation fin set has a plurality of fourth heat dissipation fins. The fourth heat dissipation fins are arranged at intervals along the Y direction. The airflow A may flow through the interval between the fourth heat dissipation fins.
The projection lens 230 includes, for example, one or more optical lenses, and the diopters of the optical lenses may be the same or different from each other. For example, the aforementioned optical lenses may include a biconcave lens, a biconvex lens, a concave-convex lens, a convex-concave lens, a plano-convex lens, and a plano-concave lens, or any combination of the above non-planar lenses. On the other hand, the projection lens 230 may also include a flat optical lens. The disclosure does not limit the specific structure of the projection lens 230.
Compared with the prior art, by adopting the light source module 100, the projection device 200 of this embodiment can have good image quality, improved durability, and low cost.
In summary, in the light source module of the embodiment, the second heat dissipation component adopts a second base having a ventilation opening, and the ventilation opening is aligned with the first ventilation surface of the first fin set. Therefore, the airflow generated by the fan can still flow through the first heat dissipation component and the second heat dissipation component through the ventilation opening even when the first heat dissipation component and the second heat dissipation component cannot be configured in the same ventilation direction. Based on the above, the light source module of the disclosure can improve the heat dissipation efficiency without changing the existing conditions such as the optical path design and the fan flow field. By adopting the light source module, the projection device of the embodiment can have good image quality and durability and also has the advantage of low cost.
The foregoing description of the preferred embodiment has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure to the precise form or to exemplary embodiments disclosed. Accordingly, the foregoing description should be regarded as illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to practitioners skilled in this art. The embodiments are chosen and described in order to best explain the principles of the disclosure and its best mode of practical application, thereby enabling persons skilled in the art to understand the disclosure for various embodiments and with various modifications as are suited to the particular use or implementation contemplated. It is intended that the scope of the disclosure be defined by the claims appended hereto and their equivalents in which all terms are meant in their broadest reasonable sense unless otherwise indicated. Therefore, the term “the disclosure”, “the invention” or the like is not necessarily limited the claim scope to a specific embodiment, and the reference to particularly preferred exemplary embodiments of the disclosure does not imply a limitation on the disclosure, and no such limitation is to be inferred. The disclosure is limited only by the spirit and scope of the appended claims. Moreover, these claims may refer to use “first”, “second”, etc. following with noun or element. Such terms should be understood as a nomenclature and should not be construed as giving the limitation on the number of the elements modified by such nomenclature unless specific number has been given. The abstract of the disclosure is provided to comply with the rules requiring an abstract, which will allow a searcher to quickly ascertain the subject matter of the technical disclosure of any patent issued from this disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Any advantages and benefits described may not apply to all embodiments. It should be appreciated that variations may be made in the embodiments described by persons skilled in the art without departing from the scope of the disclosure as defined by the following claims. Moreover, no element or component in the disclosure is intended to be dedicated to the public regardless of whether the element or component is explicitly recited in the following claims. Furthermore, the terms such as the first heat dissipation component, the second heat dissipation component, the first base, the second base, the first fin set, the second fin set, the first surface, the second surface, the first direction, the second direction, the first deflector, the second deflector, the first dichroic component, the second dichroic component, the first light source and the second light source are only used for distinguishing various elements and do not limit the number of the elements.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202210908517.5 | Jul 2022 | CN | national |
