CN1797181A - Color wheel and its cover - Google Patents

Abstract

The invention relates to a color wheel and a cover plate thereof. The color wheel comprises a motor and a filtering unit, wherein the filtering unit is arranged on the motor. The filter unit is provided with a color filter and a cover plate, the color filter is arranged on a first surface of the cover plate, and at least one convex part is arranged around the cover plate. In the invention, the periphery of the cover plate is provided with at least one convex part, and the convex part can generate larger air flow to play a better heat dissipation and cooling effect when the color wheel runs, so that the whole temperature of the color wheel can be reduced. And because the periphery of the cover plate is provided with at least one convex part, the peripheral surface area of the cover plate is larger than that of the circular or annular cover plate, so that the contact area with air can be increased, and the cooling of the color wheel is facilitated. Therefore, the invention can increase the heat dissipation effect of the color wheel, avoid the problem of the falling of the color filter caused by overhigh temperature of the color wheel and further prolong the service life of the color wheel.

Description

Color wheel and its cover

technical field

The invention relates to a color wheel and its cover, in particular to a color wheel and its cover (COLOR WHEEL AND CAP THEREOF) used in a projection system.

Background technique

According to its principle, the projection system can be divided into liquid crystal projection system (Liquid Crystal Display, LCD), single crystal silicon liquid crystal projection system (Liquid Crystal on Silicon, LCOS) and digital light source processing technology projection system (Digital Light Processing, DLP), etc., and DLP Due to its advantages of high brightness, accurate color tone reproducibility, fast response time, no noise, light weight and small size, it has become one of the new generation popular projection technologies.

In the DLP projection system, digital control is adopted, and the principle of reflected light is used to collect light from the light source, focus it through the lens, pass through the color wheel with color filters, and project it to the digital micromirror chip (Digital Micro-mirror chip). mirror Device, DMD). Since there are many tiny movable mirrors on the micromirror chip, the tilt angle and deflection time of the movable mirrors are controlled through the driving electrodes, and then the reflection direction of the light is switched to be projected by the lens group to the screen to present an image.

Please refer to FIG. 1A , which is a side view showing a conventional color wheel. The color wheel 1 mainly includes a motor 11 , a color filter 12 and a cover 13 . Wherein, one side of the color filter 12 is bonded to the cover 13 , and the other side is also fixed on the motor 11 by adhesive, and the color filter 12 is driven by the motor 11 to rotate.

Please refer to FIG. 1B , which is a top view showing a color filter and a cover sheet in a conventional color wheel. The color filter 12 and the cover 13 are bonded together by glue. The color filter 12 currently used in the industry is composed of several glass plates of different colors, and the color filter 12 and the cover 13 are all annular so that be arranged on the axle center cover of motor.

Since in a general projection system, the preceding element of the color wheel is the light source, the color wheel will receive relatively high heat and the temperature will rise rapidly when the projection system is running. The heat-resistant temperature of the adhesive used in the general color wheel is about 150°C to 180°C, and the temperature generated by the heat of the light source is about 150°C to 200°C, so the adhesive is prone to embrittlement at this temperature and causes color filtering The adhesive force between the sheet 12 and the motor 11 is reduced. In addition, the rotational speed of the motor 11 used in the general color wheel 1 is higher than 7200 rpm, so that the single glass in the color filter 12 needs to withstand a relatively large rotational pulling force (centrifugal force). Therefore, when the color wheel 1 rotates at a high speed and operates at a high temperature, it is more likely to cause the color filter 12 to be displaced or even fall off, thereby resulting in a decrease in product quality.

It can be seen that the above-mentioned existing color wheel and its cover sheet obviously still have inconveniences and defects in structure and use, and need to be further improved urgently. In order to solve the problems of the color wheel and its cover, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure for general products to solve the above problems. This is obviously a problem that relevant industry players are eager to solve.

In view of the defects of the above-mentioned existing color wheel and its cover sheet, the inventor actively researches and innovates based on years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, and cooperates with the application of academic theories. It is urgent to create a The color wheel that can reduce the temperature of the color wheel in operation to prevent the color filter from falling off can improve the general existing color wheel and its cover, making it more practical. Through continuous research, design, and after repeated trial samples and improvements, the present invention with practical value is finally created.

Contents of the invention

The purpose of the present invention is to overcome the defects of the existing color wheel and its cover, and provide a new structure of the color wheel and its cover that can generate turbulent airflow, so that it is more suitable for practical use.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to a cover sheet proposed by the present invention, it is used in a filter unit, and the filter unit includes a cover sheet and a color filter, and the color filter is arranged on a first surface of the cover sheet, There is at least one convex portion around the cover sheet.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned cover sheet, a first groove is formed on the first surface.

The aforementioned cover sheet further includes a second surface opposite to the first surface, and a second groove is formed on the second surface.

The aforementioned cover sheet further includes a third surface, which is perpendicular to the first surface, and a third groove is formed on the third surface.

The aforementioned cover sheet, wherein the cover sheet is polygonal or has a plurality of sawtooths.

In the aforementioned cover sheet, the protrusions are linear protrusions or nonlinear protrusions.

In the aforementioned cover sheet, a heavy object is placed in the third groove.

The purpose of the present invention and the solution to its technical problems are also achieved by the following technical solutions. According to a color wheel proposed by the present invention, it includes: a motor; and a filter unit, which has a color filter and a cover, the color filter is arranged on a first surface of the cover, There is at least one protrusion around the cover, and the filter unit is arranged on the motor.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned color wheel, a first groove is formed on the first surface.

In the aforementioned color wheel, the cover sheet has a second surface opposite to the first surface, and a second groove is formed on the second surface.

In the aforementioned color wheel, the cover sheet has a third surface which is perpendicular to the first surface, and a third groove is formed on the third surface.

The aforementioned color wheel, wherein the cover sheet is polygonal or has a plurality of sawtooths.

The aforementioned color wheel, wherein the convex portion is linear or non-linear.

In the aforementioned color wheel, a heavy object is placed in the third groove.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. As can be seen from above technical scheme, main technical content of the present invention is as follows:

In order to achieve the above object, the present invention provides a cover, which is used in a filter unit, and the filter unit includes a cover and a color filter, wherein the color filter is a The feature of the first surface and the cover sheet is: there is at least one convex portion around the cover sheet.

In order to achieve the above object, the present invention further provides a color wheel, which includes a motor and a filter unit, and the filter unit is arranged on the motor. The filter unit has a color filter and a cover, the color filter is arranged on a first surface of the cover, and there is at least one protrusion around the cover.

By virtue of the above-mentioned technical scheme, the color wheel and its cover sheet of the present invention have at least the following advantages: in the color wheel and its cover sheet of the present invention, there is at least one convex portion around the cover sheet, so the convex portion is on the top of the color wheel. During operation, a large airflow can be generated to exert a better heat dissipation and cooling effect, so that the overall temperature of the color wheel can be reduced. Moreover, since there is at least one convex portion around the cover, its peripheral surface area is larger than the outer surface area of the circular or ring-shaped cover, which can increase the contact area with air and help the cooling of the color wheel. Therefore, the color wheel and its cover sheet of the present invention can increase the heat dissipation effect of the color wheel, avoid the color filter falling off problem caused by the high temperature of the color wheel, and prolong the service life of the color wheel.

To sum up, the present invention provides a color wheel and its cover that can generate turbulent airflow, and there is no similar structural design published or used in similar products, so it is indeed innovative, regardless of its product or function There have been great improvements in all aspects, great progress has been made in technology, and have produced useful and practical effects, and have improved multiple functions compared with the existing color wheel and its cover, so it is more suitable for practical use, while It has wide application value in the industry, and it is a novel, progressive and practical new design.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1A is a side view showing a conventional color wheel.

FIG. 1B is a top view showing a color filter and a cover in a conventional color wheel.

FIG. 2A is a top view showing a cover sheet and a filter unit according to a preferred embodiment of the present invention.

FIG. 2B is a cross-sectional view showing the cover sheet of FIG. 2A along the dotted line A-A.

FIG. 3 is a top view showing a cover sheet and a filter unit according to another preferred embodiment of the present invention.

FIG. 4 is a top view showing a cover sheet and a filter unit according to another preferred embodiment of the present invention.

FIG. 5 is a schematic top view showing a cover sheet and a filter unit according to yet another preferred embodiment of the present invention.

Figure 6A is a color wheel showing a preferred embodiment of the present invention.

FIG. 6B is a cross-sectional view showing the filter unit in the color wheel of FIG. 6A along the dotted line B-B.

1: Color wheel 11: Motor

12: Color filter 13: Cover sheet

2: Filter unit 20: Cover sheet

21: The first surface 211: The first groove

22: Second surface 221: Second groove

23: The third surface 231: The third groove

24: convex part 25: heavy object

3: Filter unit 30: Cover sheet

31: Convex part 4: Filter unit

40: Cover sheet 41: Convex part

5: Filter unit 50: Cover sheet

51: convex part 6: color wheel

Detailed ways

In order to further explain the technical means and effects that the present invention takes to achieve the intended purpose of the invention, the specific implementation, structure, characteristics and details of the color wheel and its cover sheet proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Its functions are described in detail below, wherein the same components are described with the same reference symbols.

Please refer to FIG. 2A , which is a top view showing a cover sheet and a color filter according to a preferred embodiment of the present invention. The cover sheet 20 of the preferred embodiment of the present invention is used for a filter unit 2, and the filter unit 2 includes a cover sheet 20 and a color filter 12, wherein the cover sheet 20 has a first surface 21, and the color filter The optical sheet 12 is bonded on the first surface 21 of the cover 20 by adhesive, and the cover 20 has at least one protrusion 24 around it.

In this embodiment, in addition to the first surface 21, the cover sheet 20 further has a second surface 22 and a third surface 23 (please refer to FIG. The surface 21 is opposite, the third surface 23 is perpendicular to the first surface 21, and a first groove 211, a first groove 211, A second groove 221 and a third groove 231 .

When the color filter 12 and the cover 20 are rotated, the protrusion 24 can generate an uneven airflow, and at this time, the first groove 211, the second groove 221 and the third groove 231 can provide a channel for guiding the flow, so that The color wheel as a whole has a better cooling effect. At the same time, since the cover sheet 20 has the first groove 211 , the second groove 221 and the third groove 231 , the contact area between the cover sheet 20 and the air is increased, which is also helpful for heat dissipation. In this embodiment, the cover sheet 20 is a polygonal shape, so the convex portion 24 formed around the cover sheet 20 is a linear convex portion. However, the shape of the protrusion 24 depends on the shape of the cover sheet 20 , so when the cover sheet 20 has other shapes, the protrusion 24 may also be a non-linear protrusion.

Please refer to FIG. 2B , which is a cross-sectional view of the cover sheet 20 in FIG. 2A along the dotted line A-A. On the A-A section, the first surface 21, the second surface 22 and the third surface 23 of the cover sheet 20 are respectively formed with a first groove 211, a second groove 221 and a third groove 231. As mentioned above, the upper The column grooves not only have the function of guiding air, but also increase the surface area in contact with the air to achieve the effect of heat dissipation and cooling. The third groove 231 can also provide a dynamic balance correction function when the color wheel rotates. A weight 25 for balancing is placed in the third groove 231 to avoid component wear or falling off caused by the unbalanced rotation of the color wheel.

Please refer to FIG. 3 , which is a schematic diagram showing the cover sheet structure of another preferred embodiment of the present invention. Wherein, the cover sheet 30 is used for a filter unit 3 and glued to the color filter 12 by adhesive glue, and the cover sheet 30 has at least one convex portion 31 to play the function of turbulence. In this embodiment, the cover sheet 30 is a polygon, so the protrusion 31 is also a linear protrusion. Of course, it can also be a non-linear protrusion depending on the shape of the cover sheet 30 . In addition, each surface of the cover sheet 30 may also form grooves for flow guide to accelerate cooling efficiency or serve as a space for accommodating heavy objects during dynamic balance correction (not shown in the figure).

Please refer to FIG. 4 , which is a schematic view showing a cover sheet of another preferred embodiment of the present invention. Wherein, the cover sheet 40 is used for a filter unit 4 and is glued to the color filter 12 by adhesive, and the cover sheet 40 has at least one convex portion 41 to play a role in disturbing the flow. In this embodiment, the cover sheet 40 has a plurality of serrations, so the protrusion 41 is also a non-linear protrusion. Of course, it can also be a linear protrusion depending on the shape of the cover sheet 40 . In addition, each surface of the cover sheet 40 can also form grooves for flow guide to accelerate cooling efficiency or serve as a space for accommodating heavy objects during dynamic balance correction (not shown in the figure).

Please refer to FIG. 5 , which is a schematic view showing a cover sheet according to another preferred embodiment of the present invention. Wherein, the cover sheet 50 is used for a filter unit 5 and glued to the color filter 12 by adhesive, and the cover sheet 50 has at least one convex portion 51 to play a role in disturbing the flow. In this embodiment, the periphery of the cover sheet 50 is composed of a plurality of arcs, so the convex portion 51 is also a nonlinear convex portion. Of course, it can also be a linear protrusion according to the shape of the cover sheet 50 . In addition, each surface of the cover sheet 50 can also form grooves for flow guide to accelerate cooling efficiency or serve as a space for accommodating heavy objects during dynamic balance correction (not shown in the figure).

The following is a preferred embodiment of the color wheel of the present invention. For ease of understanding, the symbols of the elements in the following embodiments are described using the same symbols as those in the previous embodiment.

Please refer to FIG. 6A , which is a schematic diagram showing a color wheel of a preferred embodiment of the present invention. The color wheel 6 of the preferred embodiment of the present invention is composed of a motor 11 and a filter unit 2 , and the filter unit 2 is arranged on the motor 11 . The filter unit 2 has a color filter 12 and a cover 20 , the color filter 12 is disposed on a first surface 21 of the cover 20 , and at least one protrusion 24 is formed around the cover 20 .

In this embodiment, in addition to the first surface 21, the cover sheet 20 further has a second surface 22 and a third surface 23, wherein the second surface 22 is opposite to the first surface 21, and the third surface 23 is perpendicular to the first surface 21 , and a first groove 211 , a second groove 221 and a third groove 231 are respectively formed on the first surface 21 , the second surface 22 and the third surface 23 .

When the motor 11 drives the color filter 12 and the cover 20 to rotate, the protrusion 24 can generate an uneven airflow, and at this time, the first groove 211, the second groove 221 and the third groove 231 can provide a channel for guiding flow, so that the overall color wheel has a better cooling effect. At the same time, since the cover sheet 20 has the first groove 211 , the second groove 221 and the third groove 231 , the contact area between the cover sheet 20 and the air is increased, which is also helpful for heat dissipation. In this embodiment, the cover sheet 20 is a polygonal shape, so the convex portion 24 formed around the cover sheet 20 is a linear convex portion. Of course, the cover sheet may also be zigzag or arc around. The combination. Since the shape of the protrusion 24 depends on the shape of the cover 20 , when the cover 20 has other shapes, the protrusion 24 may also be a non-linear protrusion.

Please refer to FIG. 6B , which is a cross-sectional view of the filter unit in the color wheel shown in FIG. 6A along the dotted line B-B. In this embodiment, the cover sheet 20 has a first groove 211, a second groove 221, and a third groove 231. As mentioned above, the grooves listed above not only have a flow guiding effect, but also can increase the contact with air. Surface area for cooling effect. In addition, the third groove 231 of the cover plate 20 can provide a dynamic balance correction function when the color wheel 6 rotates, and a weight 25 for balancing is arranged in the third groove 231, which can avoid the color wheel from being unbalanced and causing Components are worn or detached.

To sum up, in the color wheel and its cover sheet of the present invention, there is at least one convex portion around the cover sheet, and the convex portion can generate a larger airflow to exert better heat dissipation and cooling when the color wheel is running. As a result, the overall temperature of the color wheel can be lowered. Furthermore, because in the color wheel and its cover of the present invention, there is at least one convex portion around the cover, so when the color wheel is running, it can produce a turbulent effect, instead of a circular shape as in the prior art color wheel. Or the ring-shaped cover sheet can only produce smooth airflow, so it can achieve a better heat dissipation effect on the color wheel. Moreover, since there is at least one convex portion around the cover, its peripheral surface area is larger than the outer surface area of the circular or ring-shaped cover, which can increase the contact area with air and help the cooling of the color wheel. In addition, the grooves formed on the surface of the cover not only have the function of guiding the flow, but also increase the area in contact with the air. Furthermore, the groove can still be used as a place for setting heavy objects during dynamic balance correction of the color wheel. Therefore, the color wheel and its cover sheet of the present invention can increase the cooling effect of the color wheel, avoid the color filter falling off problem caused by the high temperature of the color wheel, and provide space for dynamic balance correction, thereby extending the life of the color wheel. service life.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the structure and technical content disclosed above to make some changes or modifications to equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the present invention, Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims (14)

1. A cover for a filter unit, the filter unit includes a cover and a color filter, the color filter is arranged on a first surface of the cover, characterized in that There is at least one convex portion around the cover sheet. 2. The cover sheet according to claim 1, wherein a first groove is formed on the first surface. 3. The cover sheet according to claim 1, further comprising a second surface opposite to the first surface, and a second groove is formed on the second surface. 4. The cover sheet according to claim 1, further comprising a third surface, which is perpendicular to the first surface, and a third groove is formed on the third surface. 5. The cover sheet according to claim 1, wherein the cover sheet is polygonal or has a plurality of sawtooth. 6. The cover sheet according to claim 1, wherein the protrusions are linear protrusions or nonlinear protrusions. 7. The cover sheet according to claim 4, wherein a weight is placed in said third groove. 8. A color wheel, characterized in that it comprises: a motor; and A filter unit has a color filter and a cover, the color filter is arranged on a first surface of the cover, at least one protrusion is formed around the cover, the filter unit is arranged on the on the motor. 9. The color wheel according to claim 8, wherein a first groove is formed on said first surface. 10. The color wheel according to claim 8, wherein the cover sheet has a second surface opposite to the first surface, and a second groove is formed on the second surface. 11. The color wheel according to claim 8, wherein the cover sheet has a third surface which is perpendicular to the first surface, and a third groove is formed on the third surface. 12. The color wheel according to claim 8, wherein said cover is polygonal or has a plurality of sawtooth. 13. The color wheel according to claim 8, wherein said protrusions are linear or non-linear. 14. The color wheel according to claim 8, wherein a weight is placed in said third groove.

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