CN101430406A - Dynamic shading apparatus and projector using the same - Google Patents
Dynamic shading apparatus and projector using the same Download PDFInfo
- Publication number
- CN101430406A CN101430406A CNA2007101666857A CN200710166685A CN101430406A CN 101430406 A CN101430406 A CN 101430406A CN A2007101666857 A CNA2007101666857 A CN A2007101666857A CN 200710166685 A CN200710166685 A CN 200710166685A CN 101430406 A CN101430406 A CN 101430406A
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- dynamitic
- shading
- shielding part
- shading device
- light shielding
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Abstract
The invention discloses a dynamitic shading device which comprises a motor, a shading element and a counterweight. The motor is provided with a rotating shaft; the shading element is provided with a shading part and a hub part connected with the shading part; and the hub part is sheathed on the rotating shaft. The counterweight is arranged in the shading element.
Description
Technical field
The present invention relates to a kind of light amount control apparatus of projector, particularly relate to the projector of a kind of dynamitic shading device and application thereof.
Background technology
In general optical devices, for example pre-projecting type projector, back projecting projector or camera etc., the controlling mechanism that all needs light quantity to pass through is to produce the image data of different brightness.With projector, light source module produces solid color light to one colour wheel, be converted to colored light after, need constantly to adjust the ratio that light quantity is passed through, to produce appropriate brightness, meet the good contrast of projection image.For meeting this demand, prior art adopts a dynamitic shading device usually, via the light quantity that continuous adjustment light source passes through, promotes the image quality of projection.
Yet, the tradition shade passes through for the different light quantities of control, thus the shaped design of shading light part and light transmission part and incomplete symmetry, and the colour wheel of shading element drives running by motor, so traditional shade produces vibration because of uneven easily, cause shade to lose efficacy.In addition, because of the light of shading surface constantly shines, heat can conduct to via rotating shaft in the motor, causes motor overheated and lost efficacy, so heat dissipation problem also needs to be resolved hurrily.
Therefore, how to provide a kind of shade, can when the running start, keep rotary balance, reduce vibration and pass through, also can make shade have good effect of heat insulation, become one of important topic with stable control light quantity.
Summary of the invention
Because above-mentioned problem, the object of the present invention is to provide a kind of dynamitic shading device and applied projector thereof, it can reduce the vibratory output of dynamitic shading device by the setting of counterweight and position sensor, and accurately controls the turned position of shading element.
Because above-mentioned problem another object of the present invention is to provide a kind of projector and dynamitic shading device thereof, it has insulation effect and lost efficacy because of overheated to prevent motor.
Edge is for reaching above-mentioned purpose, to comprise a motor, a shading element and a counterweight according to a kind of dynamitic shading device of the present invention.Motor has a rotating shaft.Shading element has a light shielding part and a hub portion and light shielding part and links, and hub portion is sheathed on rotating shaft.Counterweight is arranged at shading element.
From the above, be arranged at shading element by counterweight in the mode that increases quality or reduce quality, make the shading element quality balance, keep rotary balance and reduce vibration according to a kind of dynamitic shading device of the present invention.In addition, by the reference position of a position sensor with the detecting shading element is set, can control passing through of light quantity exactly.Moreover, by a heat-barrier material being set on wheel hub, import motor into to block heat, prevent that motor lost efficacy because of overheated.Compare with prior art, the present invention not only can suppress dynamitic shading device vibration in the running, and can accurately control passing through of light quantity, also can effectively completely cut off heat and enter, and promotes the run stability of dynamitic shading device and increases the service life.
Description of drawings
Figure 1A is the synoptic diagram according to a kind of dynamitic shading device of preferred embodiment of the present invention;
Figure 1B is the front elevation of shading element among Figure 1A;
Fig. 1 C is the cut-open view of Figure 1A along G-G ' line; And
Fig. 2 is the synoptic diagram of the another kind of dynamitic shading device of preferred embodiment of the present invention.
The main element symbol description
1,1a: dynamitic shading device
11: motor
111: rotating shaft
12,12a: shading element
121: light shielding part
122,122a: hub portion
13,13a: counterweight
14: position sensor
15: the optics sense marked
S: light entrance face
O: opening
E1: first limit
E2: second limit
Embodiment
Hereinafter with reference to relevant drawings, a kind of dynamitic shading device according to preferred embodiment of the present invention is described, wherein components identical will be illustrated with identical reference marks.
Please refer to Figure 1A, Figure 1B and Fig. 1 C, the dynamitic shading device 1 of the preferred embodiment according to the present invention comprises a motor 11, a shading element 12 and a counterweight 13.Dynamitic shading device 1 can be arranged at a projector or other devices, is used to control the light quantity that light source passes through.Shading element 12 has a light shielding part 121 and a hub portion 122, and hub portion 122 links with light shielding part 121.Motor 11 can be a step motor, and it is sheathed with hub portion 122 to have a rotating shaft 111.Light shielding part 121 has an opening O, opening O is in order to the throughput of control light, in the present embodiment, the opening O of light shielding part 121, have respectively roughly with the coaxial and circumferential hoop of light shielding part 121 around the first limit E1 and the second limit E2, the last any point of E1 is gone up the distance of any point to 12 rotating shafts, 111 axle center of shading element to the distance in rotating shaft 111 axle center of shading element 12 more than or equal to E2, and this design makes opening O counterclockwise or the dextrorotation veer reduces gradually along one.
In addition, light shielding part 121 has a light entrance face S, it comprises that one for example is the light reflection material of silver, chromium or its alloy, light shielding part 121 can wholely be made by above-mentioned light reflection material, plated the above-mentioned light reflection material of one deck again after making also or by any material, produced heat to reduce light incident light shielding part 121.Because of the shape of the opening O on the light shielding part 121 along the axis of rotation of light shielding part 121 counterclockwise or the dextrorotation veer reduces gradually, so dynamitic shading device 1 appropriate location on shading element 12 in addition is provided with counterweight 13, make shading element 12 be able to smooth-going rotation, keep spin balancing and reduce vibrations.Counterweight 13 can be regular shape or irregular bulk, strip or graininess, and can select to be arranged in light shielding part 121 or the hub portion 122, also or be arranged at the inside of light shielding part 121 or hub portion 122, even be arranged at the rotating shaft 111 of motor 11.In the present embodiment, counterweight 13 is for example to be block or a spherical metal or a plastic cement sticky material and to be arranged on the light shielding part 121, and before shading element 12 and motor 11 assemblings counterweight 13 is set in advance and carries out pre-equilibration.Be noted that the material of counterweight 13 can be identical or inequality with the material of shading element 12.
Moreover, import dynamitic shading device 1 into for blocking heat, hub portion 122 has a heat-barrier material, for example being that coating modes such as (coating) is arranged on the surface of hub portion 122, hub portion 122 is directly for example constituted for the heat-barrier material of plastic cement or pottery by one, interior and cause motor 11 inefficacies to block heat conduction to motor 11.
Please refer to shown in Figure 2ly, comprise a motor 11, a shading element 12a and a counterweight 13a according to the another kind of dynamitic shading device 1a of preferred embodiment of the present invention.The dynamitic shading device 1 of the basic comprising of dynamitic shading device 1a and function and the foregoing description is all similar, does not repeat them here.The present embodiment difference is: the counterweight mode of dynamitic shading device 1a is reached by the mode that shading element 12a is removed the componentry quality, its wheel hub 122a in shading element 12a is provided with a counterweight 13a, and this counterweight 13a is a groove for example, makes the quality of shading element 12a integral body be able to balance when rotating.
In sum, projector of the present invention and dynamitic shading device thereof, it is arranged at shading element by counterweight in the mode that increases quality or reduce quality, makes the shading element quality balance, keeps rotary balance and reduces vibration.In addition, by the reference position of a position sensor with the detecting shading element is set, so can control passing through of light quantity exactly.Moreover, by heat-barrier material being set on wheel hub, import motor into to block heat, can prevent that motor lost efficacy because of overheated.Compared with prior art, the present invention not only can suppress dynamitic shading device vibration in the running, and can accurately control passing through of light quantity, also can effectively completely cut off heat and enter, and promotes the run stability of dynamitic shading device and increases the service life.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should comprise in the appended claims its equivalent modifications of carrying out or change.
Claims (17)
1. dynamitic shading device comprises:
Motor has rotating shaft;
It utilizes shading element this motor driven and rotates, and this shading element has light shielding part and hub portion, and this hub portion and this light shielding part link, and this hub portion is sheathed on this rotating shaft, and this light shielding part has opening and allows light to pass through; And
Counterweight is arranged on this shading element.
2. dynamitic shading device as claimed in claim 1, wherein this counterweight is arranged at this light shielding part or this hub portion outside or is arranged at this light shielding part or this hub portion inboard.
3. dynamitic shading device as claimed in claim 1, wherein the material of this counterweight is identical or inequality with the material of this shading element.
4. dynamitic shading device as claimed in claim 1, wherein the material of this counterweight is metal or plastic cement material.
5. dynamitic shading device as claimed in claim 4, wherein this counterweight is rule or irregular bulk, strip or graininess.。
6. dynamitic shading device as claimed in claim 1, wherein this opening has first limit and second limit, this first limit to the distance of this rotating shaft core more than or equal to the distance of this second limit to this rotating shaft core.
7. dynamitic shading device as claimed in claim 1, wherein this light shielding part has light entrance face and this light entrance face and comprises light reflection material.
8. dynamitic shading device as claimed in claim 7, wherein this light reflection material comprises silver, chromium or its alloy.
9. dynamitic shading device as claimed in claim 7, wherein this light shielding part integral body is made by this reflection material or this light shielding part is made by phenanthrene reflection material, and is provided with this reflection material on its surface.
10. dynamitic shading device as claimed in claim 1, wherein this hub portion has heat-barrier material, and this heat-barrier material is for the moulding material of this hub portion or the mode of utilization coating is coated on the surface of this hub portion.
11. dynamitic shading device as claimed in claim 10, wherein this heat-barrier material is plastic material or stupalith.
12. dynamitic shading device as claimed in claim 1, it more comprises:
The optics sense marked, it is arranged on this shading element; And
Position sensor is adjacent to this shading element.
13. dynamitic shading device as claimed in claim 12, wherein this position sensor is adjacent to this light shielding part or this hub portion of this shading element, and the set position of this position sensor is corresponding with the position of this optics sense marked.
14. dynamitic shading device as claimed in claim 12, wherein this optics sense marked comprises the geometric configuration of straight flange.
15. dynamitic shading device as claimed in claim 12, wherein this optics sense marked is arranged on this light shielding part or this hub portion of this shading element in the mode of attaching or baking vanish.
16. dynamitic shading device as claimed in claim 1, wherein this motor is a step motor, and this dynamitic shading device is applied to projector or camera.
17. a projector comprises:
Dynamitic shading device, comprising:
Motor has rotating shaft;
Shading element, it utilizes this motor driven and rotates, and this shading element has light shielding part and hub portion, and this hub portion and this light shielding part link, and this hub portion is sheathed on this rotating shaft, and this light shielding part has opening; And
Counterweight is arranged on this shading element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101666857A CN101430406A (en) | 2007-11-05 | 2007-11-05 | Dynamic shading apparatus and projector using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101666857A CN101430406A (en) | 2007-11-05 | 2007-11-05 | Dynamic shading apparatus and projector using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101430406A true CN101430406A (en) | 2009-05-13 |
Family
ID=40645908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101666857A Pending CN101430406A (en) | 2007-11-05 | 2007-11-05 | Dynamic shading apparatus and projector using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101430406A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597787A (en) * | 2015-10-16 | 2017-04-26 | 台湾彩光科技股份有限公司 | Projector combined type optical color wheel device |
| WO2017211132A1 (en) * | 2016-06-07 | 2017-12-14 | 深圳市光峰光电技术有限公司 | Color wheel assembly and projection device |
-
2007
- 2007-11-05 CN CNA2007101666857A patent/CN101430406A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597787A (en) * | 2015-10-16 | 2017-04-26 | 台湾彩光科技股份有限公司 | Projector combined type optical color wheel device |
| WO2017211132A1 (en) * | 2016-06-07 | 2017-12-14 | 深圳市光峰光电技术有限公司 | Color wheel assembly and projection device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090513 |