CN101364035A - Excessive heating prevention device - Google Patents
Excessive heating prevention device Download PDFInfo
- Publication number
- CN101364035A CN101364035A CNA2007101412935A CN200710141293A CN101364035A CN 101364035 A CN101364035 A CN 101364035A CN A2007101412935 A CNA2007101412935 A CN A2007101412935A CN 200710141293 A CN200710141293 A CN 200710141293A CN 101364035 A CN101364035 A CN 101364035A
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- fan
- rotating speed
- protection device
- overheat protection
- projection arrangement
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Abstract
The invention relates to an overheat protection device which is applied in a projecting device. The projecting device comprises a light source assembly. The overheat protection device comprises an inclined angle detector, a heat-dissipating assembly and a control circuit. When detecting a first inclined angle and a second inclined angle of the light source assembly relative to a reference plane, the inclined angle detector transmits a first inclined angle signal and a second inclined angle signal independently. The control circuit responds to the first inclined angle signal to control the heat-dissipating assembly, so that a first operating mode of the heat-dissipating assembly is converted to a second operating mode. The control circuit responds to the second inclined angle signal to control the projecting device, so that a first operating mode of the projecting device is converted to a second operating mode.
Description
Technical field
The invention relates to a kind of overheat protection device, more specifically say, is the overheat protection device that is used for projection arrangement about a kind of.
Background technology
General projection arrangement on the market comprises an illuminator and an imaging system all at least, illuminator provide evenly and integrated light beam to this imaging system, imaging system is then finished the image output of rear end by aforesaid light beam.Part in illuminator, usually use the high power bulb to constitute a light source assembly, so that the source of light beam to be provided, and this also is the topmost thermal source of projection arrangement (handling the DLP projection arrangement especially like this with digital light) usually, therefore, the manufacturer of projection arrangement, usually need dispel the heat to light source assembly, effectively solution is proposed, for example use common on the market radiating modes such as fan or heat pipe, reduce the operational temperature of light source assembly, avoiding the damage of light source assembly, and then the problem that causes projection arrangement to continue to use.
Because hot-air has the characteristic of rising, the hot-air of projection arrangement inside and non-uniform Distribution, so the temperature at its each position also is not quite similar.Manufacturer promptly can distribute the design optimization of dispelling the heat at the temperature inside that projection arrangement lies against on the plane when making projection arrangement.When yet projection arrangement uses in reality, often, also can hang upside down sometimes and be suspended in ceiling, or adapt to the operating environment of non-flat forms, and furnish running in the mode that tilts not with the horizontal operation.
Because the radiating mode of projection arrangement inside is promptly fixing during fabrication, when projection arrangement is not entirely to be placed on the plane, and in the mode that tilts when the running, will cause its temperature inside to distribute and change, surpass expecting state.In other words, the heat radiation framework that is disposed during manufacturing can't change thereupon, the light source assembly that belongs to maximum pyrotoxin with suitable cooling, this situation will cause the damage of bulb in the light source assembly, or shift to an earlier date critical serviceable life, thereby quicken the performance decline of projection arrangement, more serious consequence then causes whole projection arrangement to operate.
Therefore, to how to cause projection arrangement temperature inside changes in distribution, carry out efficiently radiates heat, to increase the use elasticity of projection arrangement at the different disposing way of response, this is manufacturer's target that efforts still need to be solves, and also is the function that numerous users institute is eagerly expected.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of overheat protection device, can respond different disposing way and cause projection arrangement temperature inside changes in distribution to carry out efficiently radiates heat, to increase the use elasticity of projection arrangement.
Overheat protection device according to an aspect of the present invention, it is used for a projection arrangement, and this projection arrangement comprises a light source assembly.This overheat protection device comprises an inclination angle detection device, a radiating subassembly and a control circuit.When the inclination angle detection device detects one first pitch angle that this light source assembly constitutes with respect to a reference surface and one second pitch angle, to transmit one first tilt signals and one second tilt signals respectively.Control circuit responds this first tilt signals and controls this radiating subassembly, is transformed to one second operating mode by one first operating mode, and responds this second tilt signals and control this projection arrangement, is transformed to one second operating mode by one first operating mode.
Aforesaid overheat protection device is to detect first pitch angle and second pitch angle simultaneously to carry out the conversion of the operating mode of radiating subassembly and projection arrangement respectively, and the present invention does not limit the number at detectable pitch angle, and other overheat protection device of the present invention also can only detect a pitch angle or detect and surpass the conversion that aforementioned operating state is finished at two pitch angle.
Overheat protection device according to a further aspect of the invention, it is used for an electro-heat equipment.This overheat protection device comprises an inclination angle detection device, a radiating subassembly and a control circuit.When this inclination angle detection device detects the pitch angle that this pyrotoxin constitutes with respect to a reference surface, and transmit a tilt signals according to this pitch angle.This control circuit then responds an operating mode of this this radiating subassembly of tilt signals conversion, to prevent this superheating of heating device.
Aforesaid overheat protection device is to detect the conversion of pitch angle with the operating mode of carrying out radiating subassembly, and then prevents superheating of heating device.And the present invention does not limit the number at detectable pitch angle, and other overheat protection device of the present invention also can detect and surpass the conversion that aforementioned operating state is finished at two pitch angle.
The present invention learns the placement state of projection arrangement according to detected pitch angle, and transmit tilt signals to control circuit, variation with the distribution of response projection arrangement temperature inside, carry out the conversion of the radiating mode of projection arrangement inside, to reach the effect of the superheating of heating device that prevents projection arrangement or projection arrangement inside, increase the scope of application and the elasticity of projection arrangement, and then avoid the damage of inner each element of projection arrangement, and reach the purpose in the serviceable life that prolongs inner each element of projection arrangement.
Description of drawings
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail, knows that usually the knowledgeable just can understand other purposes of the present invention so that have in the art, and technological means of the present invention and enforcement aspect; Wherein:
Fig. 1 is the floor map of preferred embodiment of the present invention;
Fig. 2 is the schematic perspective view of preferred embodiment of the present invention;
Fig. 3 is the schematic side view that the projection arrangement of preferred embodiment is placed in a plane;
Fig. 4 is the front-view schematic diagram that the projection arrangement of preferred embodiment is placed in this plane;
Fig. 5 is the projection arrangement of preferred embodiment and the schematic side view that this plane is an elevation angle; And
Fig. 6 is the projection arrangement of preferred embodiment and the front-view schematic diagram that this plane is a side rake angle.
Embodiment
Preferred embodiment of the present invention such as Fig. 1 and shown in Figure 2, a projection arrangement 1 shown in the figure, it comprises a light source assembly 11, an overheat protection device 13, a power control circuit 15, an image-forming assembly 17 and a camera lens 19.Overheat protection device 13 comprises an inclination angle detection device 131, a radiating subassembly 133, a control circuit 135 and a storer 137.And radiating subassembly 133 also comprises one first fan 1331 and one second fan 1333.Light source assembly 11 be along a primary optical axis (being the Z-direction that Fig. 1 illustrates) throw light to image-forming assembly 17, it is the main heater element of projection arrangement 1.1333 primary optical axis Z about light source assembly 11 of first fan 1331 and second fan are oppositely arranged.
Fig. 3 and Fig. 4 are that projection arrangement 1 is placed in side-looking and the front-view schematic diagram on the plane 3, and this moment, first fan 1331 of radiating subassembly 133 and second fan 1333 all were with the running of one first rotating speed, and also normal projection's one image of projection arrangement 1.
As shown in Figure 1, primary optical axis Z is parallel with first (being X-axis), and vertical with second (being Y-axis).When projection arrangement 1 pivots (pivot turn) along first (being X-axis), and when making the projecting direction of camera lens 19 and plane 3 be an elevation angle, illustrate as Fig. 5, projection arrangement 1 forms one first tiltangle 1 with the relativeness on plane 3.Inclination angle detection device 131 will detect first tiltangle 1 at this moment, and transmits one first tilt signals 130 to control circuit 135 according to first tiltangle 1.Control circuit 135 will transmit one first control signal 134 to radiating subassembly 133, in order to the operating mode of conversion radiating subassembly 133 according to first tilt signals 130.The characteristic that rises according to hot-air and first fan 1331 and second fan 1333 are in the opposite position shown in Fig. 5, first rotating speed of first fan 1331 will be reduced to one second rotating speed, and first rotating speed of second fan 1333 will be promoted to one the 3rd rotating speed, keeping projection arrangement 1 temperature inside normal, and keep the normal operation of projection arrangement 1.
And when projection arrangement 1 along pivoting with vertical in fact one second (being the Y-axis among Fig. 1) of primary optical axis Z, and when being a side rake angle, projection arrangement 1 then illustrates as Fig. 6 with the relativeness on plane 3.Projection arrangement 1 will form one first tiltangle 2 with plane 3.Inclination angle detection device 131 will detect second tiltangle 2 at this moment, and transmits one second tilt signals 132 to control circuit 135 according to second tiltangle 2.Because projection arrangement 1 is when Y-axis is rotated, it is second tiltangle 2 that the wick of light source assembly 11 will tilt, and this will cause wick to burn or shorten serviceable life, and then causes can't using of projection arrangement 1.Therefore control circuit 135 will transmit the power control circuit 15 of one second control signal 136 to projection arrangement 1 according to second tilt signals 132, in order to the operating mode of conversion projection arrangement 1.Promptly be after a Preset Time, projection arrangement 1 shut down,, avoid burning with the wick of protection light source assembly 11 by power control circuit 15.
After control circuit 135 receives first tilt signals 130 and second tilt signals 132, will read the question blank (scheming not shown) that is stored in the storer 137 operating mode with proper transformation radiating subassembly 133 and projection arrangement 1.Wherein question blank is a record projection arrangement 1 when forming first tiltangle 1 with plane 3, the corresponding relation between first fan 1331 of radiating subassembly 133 and the rotating speed of second fan 1333 and first tiltangle 1.When also writing down simultaneously projection arrangement 1 and forming second tiltangle 2 with plane 3, the corresponding relation between the Preset Time that projection arrangement 1 must shut down and second tiltangle 2.This rotating speed of promptly representing first fan 1331 and second fan 1333 will have different speed according to the difference of first tiltangle 1.In the same manner, projection arrangement 1 Preset Time that must shut down also can have different settings according to the difference of second tiltangle 2.Aforesaid question blank value corresponding is known or precalculated preferable or optimization radiating mode, does not describe in detail especially at this.
In more detail, first tiltangle 1 can be divided into 6 kinds of sections (for example per 60 degree are set at a section) in the question blank of storer, and first fan 1331 of radiating subassembly 133 and second fan 1333 can carry out the setting of its corresponding rotating speed respectively corresponding to the difference of these sections.And the Preset Time that projection arrangement 1 must shut down then is to adjust according to second tiltangle 2, for example when second tiltangle 2 is spent above positive and negative 10, then through 30 seconds projection arrangement 1 is shut down.And if when second tiltangle 2 is spent above positive and negative 20, then projection arrangement 1 shuts down immediately, burns or shortens the serviceable life of projection arrangement 1 with the wick of avoiding light source assembly 11.
In addition, though present embodiment detects two pitch angle with inclination angle detection device 131, be used as the foundation of the operating mode of conversion radiating subassembly 133 and projection arrangement 1.But the present invention is not restricted to only detect two pitch angle, the present invention can also detect a pitch angle or detect and surpass the conversion that aforementioned operating state is finished at two pitch angle, affiliated technical field has knows that usually how the knowledgeable can be directly acquainted with other embodiment based on above-mentioned preferred embodiment, with the conversion of the operating mode of carrying out radiating subassembly 133 and projection arrangement 1, so do not repeat them here.
In addition, the present invention does not also limit the section number of first tiltangle 1 and when second tiltangle 2, the Preset Time that projection arrangement 1 must shut down, affiliated technical field have knows that usually the knowledgeable also can understand other by the explanation of leading portion and implement aspect, also repeats no more at this.And radiating subassembly 133 not only limits and is arranged at before the light source assembly 11, and it can also be arranged at other position of projection arrangement 1 inside, and carries out suitable heat radiation, with the damage of other assembly of avoiding projection arrangement 1.
From the above, the present invention learns the placement state of projection arrangement according to detected pitch angle, and transmit tilt signals to control circuit, with the variation that distributes corresponding to the projection arrangement temperature inside, carry out the conversion of the radiating mode of projection arrangement inside, or whole projection arrangement is shut down, to avoid continuous high temperature, cause the damage of light source assembly, to reach the effect that prevents that projection arrangement is overheated, increase the scope of application and the elasticity of projection arrangement, and then avoid the damage of other elements of projection arrangement, and reach and prolong inner each element of the projection arrangement purpose in serviceable life.
The above embodiments only are used for exemplifying enforcement aspect of the present invention, and explain technical characterictic of the present invention, are not to be used for limiting category of the present invention.Any be familiar with this operator can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated, the scope of the present invention should be as the criterion with the application's claim scope.
Claims (23)
1. an overheat protection device is used for a projection arrangement, and this projection arrangement comprises a light source assembly and a power circuit, it is characterized in that this overheat protection device comprises:
One inclination angle detection device when detecting the pitch angle that this light source assembly constitutes with respect to a reference surface, and transmits a tilt signals according to this pitch angle;
One radiating subassembly; And
One control circuit responds this tilt signals, control this radiating subassembly and this power circuit one of them, with the operating mode of this projection arrangement of conversion.
2. overheat protection device according to claim 1, it is characterized in that this light source assembly is suitable can be along a primary optical axis throw light, and to be this projection arrangement rotate and form along parallel with this primary optical axis one at this pitch angle.
3. overheat protection device according to claim 2 is characterized in that this radiating subassembly comprises a fan, and this control circuit responds this tilt signals and controls this fan, is reduced to one second rotating speed by one first rotating speed.
4. overheat protection device according to claim 2 is characterized in that this radiating subassembly comprises a fan, and this control circuit responds this tilt signals and controls this fan, and being promoted by one first rotating speed is one the 3rd rotating speed.
5. overheat protection device according to claim 2, it is characterized in that this radiating subassembly comprises one first fan and one second fan, this control circuit responds this tilt signals and controls this first fan, be reduced to one second rotating speed by one first rotating speed, and control this second fan, being promoted by one first rotating speed is one the 3rd rotating speed.
6. overheat protection device according to claim 5 is characterized in that this one first fan and second fan, is two opposite sides that are symmetricly set in this light source assembly about this primary optical axis.
7. overheat protection device according to claim 5 is characterized in that also comprising a storer, and in order to store a question blank, this question blank writes down the corresponding relation between this second rotating speed and the 3rd rotating speed and this pitch angle.
8. overheat protection device according to claim 1, it is characterized in that this light source assembly is suitable can be along a primary optical axis throw light, and to be this projection arrangement rotate and form along vertical with this primary optical axis one at this pitch angle.
9. overheat protection device according to claim 8 is characterized in that this control circuit responds this tilt signals and controls this power circuit, and this projection arrangement is shut down.
10. overheat protection device according to claim 9 is characterized in that also comprising a storer, and in order to store a question blank, this question blank is the corresponding relation between this Preset Time of record and this pitch angle.
11. an overheat protection device is used for a projection arrangement, this projection arrangement comprises a light source assembly, it is characterized in that this overheat protection device comprises:
One inclination angle detection device, when detecting one first pitch angle that this light source assembly constitutes with respect to a reference surface and one second pitch angle, suitable to transmit one first tilt signals and one second tilt signals respectively;
One radiating subassembly; And
One control circuit responds this first tilt signals and controls this radiating subassembly, is transformed to one second operating mode by one first operating mode, and responds this second tilt signals and control this projection arrangement, is transformed to one second operating mode by one first operating mode.
12. overheat protection device according to claim 11, it is characterized in that this light source assembly is suitable can be along a primary optical axis throw light, and to be this projection arrangement rotate and form along parallel with this primary optical axis one first at this first pitch angle; This second pitch angle is that this projection arrangement forms along one second rotation vertical with this primary optical axis.
13. overheat protection device according to claim 12 is characterized in that this radiating subassembly comprises a fan, this control circuit responds this first tilt signals and controls this fan, is reduced to one second rotating speed by one first rotating speed.
14. overheat protection device according to claim 12 is characterized in that this radiating subassembly comprises a fan, this control circuit responds this first tilt signals and controls this fan, and being promoted by one first rotating speed is one the 3rd rotating speed.
15. overheat protection device according to claim 12, it is characterized in that this radiating subassembly comprises one first fan and one second fan, this control circuit responds this first tilt signals and controls this first fan, be reduced to one second rotating speed by one first rotating speed, and this second fan of control, being promoted by one first rotating speed is one the 3rd rotating speed, and responds this second tilt signals and control this projection arrangement, shuts down behind a Preset Time.
16. overheat protection device according to claim 15 is characterized in that this one first fan and second fan, is two opposite sides that are symmetricly set in this light source assembly about this primary optical axis.
17. overheat protection device according to claim 15, it is characterized in that also comprising a storer, in order to store a question blank, this question blank is the corresponding relation between this second rotating speed of record and the 3rd rotating speed and this first pitch angle, and writes down the corresponding relation between this Preset Time and this second pitch angle.
18. an overheat protection device is used for an electro-heat equipment, it is characterized in that this overheat protection device comprises:
One inclination angle detection device when detecting the pitch angle that this pyrotoxin constitutes with respect to a reference surface, and transmits a tilt signals according to this pitch angle;
One radiating subassembly; And
One control circuit responds this tilt signals, and an operating mode of this radiating subassembly of conversion is to prevent this superheating of heating device.
19. overheat protection device according to claim 18 is characterized in that this radiating subassembly comprises a fan, this control circuit responds this tilt signals and controls this fan, is reduced to one second rotating speed by one first rotating speed.
20. overheat protection device according to claim 18 is characterized in that this radiating subassembly comprises a fan, this control circuit is that this tilt signals of response is controlled this fan, and being promoted by one first rotating speed is one the 3rd rotating speed.
21. overheat protection device according to claim 18, it is characterized in that this radiating subassembly comprises one first fan and one second fan, this control circuit responds this tilt signals and controls this first fan, be reduced to one second rotating speed by one first rotating speed, and control this second fan, being promoted by one first rotating speed is one the 3rd rotating speed.
22. overheat protection device according to claim 21 is characterized in that this one first fan and second fan, is two opposite sides that are symmetricly set in this pyrotoxin.
23. overheat protection device according to claim 21 is characterized in that also comprising a storer, in order to store a question blank, this question blank is the corresponding relation between this second rotating speed of record and the 3rd rotating speed and this pitch angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101412935A CN101364035B (en) | 2007-08-06 | 2007-08-06 | Excessive heating prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101412935A CN101364035B (en) | 2007-08-06 | 2007-08-06 | Excessive heating prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101364035A true CN101364035A (en) | 2009-02-11 |
| CN101364035B CN101364035B (en) | 2012-04-18 |
Family
ID=40390463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101412935A Expired - Fee Related CN101364035B (en) | 2007-08-06 | 2007-08-06 | Excessive heating prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101364035B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI447510B (en) * | 2013-02-07 | 2014-08-01 | Delta Electronics Inc | Heat Dissipation Structure of Projection Device and Heat Dissipation Method Thereof |
| CN110967896A (en) * | 2018-09-28 | 2020-04-07 | 台达电子工业股份有限公司 | Cooling device and projector |
-
2007
- 2007-08-06 CN CN2007101412935A patent/CN101364035B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI447510B (en) * | 2013-02-07 | 2014-08-01 | Delta Electronics Inc | Heat Dissipation Structure of Projection Device and Heat Dissipation Method Thereof |
| US9016871B2 (en) | 2013-02-07 | 2015-04-28 | Delta Electronics, Inc. | Heat dissipation structure of projection device and heat dissipation method thereof |
| CN110967896A (en) * | 2018-09-28 | 2020-04-07 | 台达电子工业股份有限公司 | Cooling device and projector |
| CN110967896B (en) * | 2018-09-28 | 2022-01-21 | 台达电子工业股份有限公司 | Cooling device and projector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101364035B (en) | 2012-04-18 |
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Granted publication date: 20120418 Termination date: 20190806 |