Patent Application
20230126398
This application claims the priority benefit of China Application Serial No. 202122563174.7, filed on Oct. 25, 2021. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
The invention relates to a rotation wheel and a projection apparatus, and particularly relates to a rotation wheel having higher structural reliability and being able to rotate smoothly rotation, and a projection apparatus has the rotation wheel.
A rotation wheel in a projection apparatus (a projector) is driven by a driving assembly (for example, a motor) to rotate. To reduce the centrifugal force resulting from an imbalanced mass distribution of the rotation wheel relative to the driving assembly, the rotation wheel is dynamically balanced when manufactured, so that the rotation wheel can rotate smoothly. Generally speaking, there are two common methods for dynamic balancing correction, which are to increase and decrease the mass, respectively. Specifically, the correction made by increasing the mass includes adding a balancing material to the rotation wheel to correct the imbalanced mass distribution of the rotation wheel.
Conventionally, four options are provided for the process of adding the extra balancing material to the rotation wheel:
The information disclosed in this Background section is only for enhancement of understanding of the background of the described technology and therefore it may contain information that does not from the prior art that is already known to a person of ordinary skill in the art. Further, the information disclosed in the Background section does not mean that one or more problems to be resolved by one or more embodiments of the invention was acknowledged by a person of ordinary skill in the art.
The invention provides a rotation wheel having higher structural reliability. In addition, in the rotation wheel, an imbalanced mass distribution is corrected.
The invention further provides a projection apparatus which includes the rotation wheel. With the rotation wheel, the projection apparatus exhibits favorable projection quality and product competitiveness.
The other reasons and advantages of the invention can be further understood from the technical features disclosed by the invention.
To achieve one or partial or all of the foregoing reasons or other reasons, an embodiment of the invention provides a rotation wheel, including a substrate, a driving assembly, a clamping member and a balancing assembly. The driving assembly is connected with the substrate, and is configured to drive the substrate to rotate around an axis of the driving assembly as a central axis. The clamping member is disposed along the axis on the substrate. The balancing assembly includes at least one balancing material, an adhesive material and at least one channel. The adhesive material encapsulates the balancing material and is filled into the channel to fix the balancing assembly onto the clamping member.
In an embodiment of the invention, the balancing material is one balancing material, and the channel is a plurality of through holes penetrating the balancing material and separated from each other.
In an embodiment of the invention, the balancing material is one balancing material, and the channel is a slot penetrating the one balancing material.
In an embodiment of the invention, the balancing material is a plurality of balancing materials, and the channel includes plural gaps which are respectively located between the balancing materials.
In an embodiment of the invention, the channel further comprises plural through holes which penetrate the balancing materials respectively.
In an embodiment of the invention, the balancing material is connected with a configuration surface of the clamping member by the adhesive material.
In an embodiment of the invention, a shape of the balancing material includes a ring-shaped column, a cylindrical column, a sphere or a polygonal column.
In an embodiment of the invention, a density of the balancing material is greater than 2 g/cm3 and less than 23 g/cm3.
In an embodiment of the invention, the density of the above balancing material is greater than a density of the substrate.
In an embodiment of the invention, the density of the balancing material is higher than a density of the clamping member.
In the embodiment of the invention, the rotation wheel further includes an optical layer disposed on the substrate and located on a same side of the substrate with the clamping member.
In an embodiment of the invention, a shape of the substrate and the clamping member are a hollow ring respectively. The substrate and the clamping member are respectively disposed to be coaxial with the driving assembly.
To achieve one or partial or all of the foregoing reasons or other reasons, an embodiment of the invention provides a projection apparatus. The projection apparatus includes an illumination module, a light valve and a projection lens. The illumination module includes a light source device and a rotation wheel. The illumination module is adapted to provide an illumination light beam. The rotation wheel is disposed on a transmission path of an excitation light beam provided by the light source device. The rotation wheel includes a substrate, a driving assembly, a clamping member and a balancing assembly. The driving assembly is connected with the substrate, and is configured to drive the substrate to rotate around an axis of the driving assembly as a central axis. The clamping member is disposed along the axis on the substrate. The balancing assembly includes at least one balancing material, a adhesive material and at least one channel. The adhesive material encapsulates the balancing material and is filled into the channel to fix the balancing assembly onto the clamping member. The light valve is disposed on a transmission path of the illumination light beam from the rotation wheel and is configured to convert the illumination light beam into an image light beam. The projection lens is disposed on a transmission path of the image light beam and projects the image light beam out the projection apparatus.
Based on the above, the embodiments of the invention have at least one of the following advantages or effects. In the rotation wheel of the invention, the balancing assembly includes the balancing material, the adhesive material and the channel. The adhesive material encapsulates the balancing material and is filled into the channel to fix the balancing assembly onto the clamping member. With the design of the channel, the contact areas between the adhesive material and the balancing material as well as the clamping member and the adhesion after encapsulating can be increased, thereby strengthening the structural reliability of the rotation wheel of the invention. In addition, the projection apparatus using the rotation wheel of the invention exhibits favorable projection quality and product competitiveness.
Other objectives, features and advantages of the present invention will be further understood from the further technological features disclosed by the embodiments of the present invention wherein there are shown and described preferred embodiments of this invention, simply by way of illustration of modes best suited to carry out the invention.
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which are shown by way of illustration specific embodiments in which the invention 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 present invention 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 present invention. 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 directly faces “B” component or one or more additional components are 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 are between “A” component and “B” component. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.
Furthermore, the light source device 13 adopted in the embodiment, for instance, is a laser diode (LD), such as a laser diode bank, or a light emitting diode (LED). Specifically, a light source complying with the volume requirement may be adopted in practical designs, and the embodiment is not limited thereto. The light valve 14 is a reflective light modulator like, for example, a liquid crystal on silicon panel (LCoS panel), a digital micro-mirror device (DMD), etc. In an embodiment, the light valve 14 is a transmissive light modulator like, for example, a transparent liquid crystal panel, an electro-optical modulator, a maganeto-optic modulator, an acousto-optic modulator (AOM), etc., but the embodiment is not particularly limited by the configuration and the type of the light valve 14. The detailed steps and examples for converting the illumination light beam L1 into the image light beam L2 through the light valve 14 have been taught, recommended and explained in the common knowledge of the related field, so no more details in these regards are to be provided. In addition, the projection lens 16, for instance, includes a combination of one or more optical lens elements with refractive power. For example, the one or more optical lens elements may include various combinations of a biconcave lens element, a biconvex lens element, a concave-convex lens element, a convex-concave lens element, a plane-convex lens element and a plane-concave lens element. In an embodiment, the projection lens 16 can also include a plane optical lens element for projecting the image light beam 12 from the light valve 14 out of the projection apparatus 10 through reflection or transmittance. Here, the embodiment is not particularly limited by the configuration and the type of the projection lens 16.
Specifically, in the embodiment, the substrate 110 is, for example, a phosphor wheel substrate, a filtering color wheel substrate and a diffusing wheel substrate. The shapes of the substrate 110 and the clamping member 130 are hollow ring-shaped respectively, and the substrate 110 and the clamping member 130 are disposed to be coaxial with the driving assembly 120 respectively. Here, the material of the clamping member 130 is, for instance, a metal, a plastic, or a ceramic material. Particularly, in the embodiment, the channels 146a of the balancing assembly 140a are embodied as plural through holes penetrating the balancing material 142a and separated from each other. When the rotation wheel 100a is viewed from a top perspective, the through holes are in a shape of circular holes for instance, but the invention is not limited by the shape of the through holes. As shown in
Further specifically, referring to
Referring to
With the design of the channels 146a of the balancing assembly 140a of the embodiment, a curing light beam can be directly irradiated to the bottom of the balancing material 142a. In this way, the adhesive material 144a at the bottom of the balancing material 142a can be easily cured by irradiation while increasing the contact area between the adhesive material 144a and the balancing material 142a. Thus, the balancing material 142a is closely attached to the clamping member 130. In brief, with the design of the channels 146a, the contact areas between the adhesive material 144a, the balancing material 142a as well as the clamping member 130 and the adhesion after encapsulation can be increased, thus strengthening the structural reliability of the rotation wheel 100a of the embodiment. Besides, the projection apparatus 10 using the rotation wheel 100a of the embodiment exhibits favorable projection quality and product competitiveness.
In the following embodiment, the reference symbols and a portion of the contents of the foregoing embodiment will still be used. In addition, like reference symbols are adopted to represent like or similar components, and the descriptions of the repeated technical contents are omitted. The descriptions of the omitted part can be found in the foregoing embodiment and will not be repeated again in the following.
With the design of the channel 146b in the balancing assembly 140b, a curing light beam can be directly irradiated to the bottom of the balancing material 142b. In this way, the adhesive material 144b at the bottom of the balancing material 142b can be easily cured by irradiation while increasing the contact area between the adhesive material 144b and the balancing material 142b. Thus, the balancing material 142b is closely attached to the clamping member 130. In brief, with the design of the channel 146b, the contact areas between the adhesive material 144b, the balancing material 142b as well as the clamping member 130 and the adhesion after encapsulation can be increased, thereby strengthening the structural reliability of the rotation wheel 100b of the embodiment.
Since the balancing assembly 140c of the embodiment is designed with the channels 146c, 148c, a curing light beam can be directly irradiated to the bottom of the balancing materials 142c. In this way, the adhesive material 144c at the bottom of the balancing material 142c can be easily cured by irradiation while increasing the contact area between the adhesive material 144c and the balancing materials 142c. Thus, the balancing materials 142c is closely attached to the clamping member 130. In brief, with the design of the channels 146c, 148c, the contact areas between the adhesive material 144c, the balancing materials 142c as well as the clamping member 130 and the adhesion after encapsulation can be increased, thus strengthening the structural reliability of the rotation wheel 100c of the embodiment.
With the design of the channels 146d, 148d in the balancing assembly 140d, a curing light beam can be directly irradiated to the bottom of the balancing materials 142d. In this way, the adhesive material 144d at the bottom of the balancing material 142d can be easily cured by irradiation while increasing the contact area between the adhesive material 144d and the balancing material 142d. Thus, the balancing material 142d is closely attached to the clamping member 130. That is, in the embodiment a greater number of balancing materials 142d are arranged in the same area, and through holes (i.e., the channels 146d) and gaps (i.e., the channels 148d) are provided, as light channels, between the respective balancing materials 142d, thereby making it easier to irradiate the curing light beam to the bottom of the balancing materials 142d. In brief, with the design of the channels 146d, 148d, the contact areas between the adhesive material 144d, the balancing materials 142d as well as the clamping member 130 and the adhesion after encapsulation can be increased, thereby strengthening the structural reliability of the rotation wheel 100d of the embodiment.
With the design of the channels 148e in the balancing assembly 140e, a curing light beam can be directly irradiated to the bottom of the balancing materials 142e. In this way, the adhesive material 144e at the bottom of the balancing material 142e can be easily cured by irradiation while increasing the contact area between the adhesive material 144e and the balancing material 142e. Thus, the balancing material 142e is closely attached to the clamping member 130. That is, in the embodiment, a greater number of balancing materials 142e are arranged in the same area, and the gaps (i.e., the channels 148e) are provided, as light channels, between the respective balancing materials 142e, thereby making it easier to irradiate the curing light beam to the bottom of the balancing materials 142e. In brief, with the design of the channels 148e, the contact areas between the adhesive material 144e, the balancing materials 142e as well as the clamping member 130 and the adhesion after encapsulation can be increased, thereby strengthening the structural reliability of the rotation wheel 100e of the embodiment.
Based on the above, the embodiments of the invention has at least one of the following advantages or effects. In the rotation wheel of the invention, the balancing assembly includes the balancing material, the adhesive material and the channel. The adhesive material encapsulates the balancing material and is filled into the channel to fix the balancing assembly onto the clamping member. With the design of the channel, the contact area between the adhesive material, the balancing material and the clamping member and the adhesion after encapsulation can be increased, thereby strengthening the structural reliability of the rotation wheel of the invention. In addition, the projection apparatus using the rotation wheel of the invention exhibits favorable projection quality and product competitiveness.
The foregoing description of the preferred embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention 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 invention and its best mode practical application, thereby to enable persons skilled in the art to understand the invention 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 invention 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 invention”, “the present invention” or the like does not necessarily limit the claim scope to a specific embodiment, and the reference to particularly preferred exemplary embodiments of the invention does not imply a limitation on the invention, and no such limitation is to be inferred. The invention 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 of the invention. 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 present invention as defined by the following claims. Moreover, no element and component in the present disclosure is intended to be dedicated to the public regardless of whether the element or component is explicitly recited in the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202122563174.7 | Oct 2021 | CN | national |
