CN1873522A - Projector, and method of heat elimination - Google Patents
Projector, and method of heat elimination Download PDFInfo
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- CN1873522A CN1873522A CN 200510074328 CN200510074328A CN1873522A CN 1873522 A CN1873522 A CN 1873522A CN 200510074328 CN200510074328 CN 200510074328 CN 200510074328 A CN200510074328 A CN 200510074328A CN 1873522 A CN1873522 A CN 1873522A
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- projector
- supply apparatus
- light supply
- heat energy
- heat
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Abstract
The invention relates to a projection that includes case, light resource device and at least one heat emission fin setting on the case. The projection would emit the heat by natural convection. The invention also supplies a heat emission method that includes the following steps: the heat sensor testing the temperature of light resource device; when the temperature reaching the preset value, the power would be changed, and the heat light resource device would be changed to achieve the better heat emission effect.
Description
Technical field
The invention relates to a kind of projector, in particular to a kind of portable projector and heat dissipating method thereof.
Background technology
Along with projector is more and more frequent in the various application of daily life, the demand of the portable projector that weight is lighter, profile is smaller and more exquisite also progressively enlarges.
Because projector belongs to high-accuracy optical, mechanical and electronic integration product, its inner member is very responsive to temperature, adds the in-built complicacy of projector, makes the heat dissipation problem of projector become the big problem that manufacturer will face.Especially improve the radiating efficiency of projector how and take into account simultaneously on its complete machine miniaturization and the noise problem, more need to note especially.
Projector needs high brightness when input signal, for reaching high like this brightness output, projector must adopt powerful light supply apparatus, and after process was worked for a long time, light supply apparatus was inevitable at the very high heat energy of the inner generation of projector.Except the heat energy that the light supply apparatus of projector produces, the power supply of projector and imaging system etc. also can produce heat energy when work.
The heat energy of generations such as light source of projector, imaging system, power supply is owing to all converge in projector inside, thereby the high temperature that produces is not only influential for the normal use of projector, and can shorten the serviceable life of its inner member greatly.
In order to solve the heat energy that converge projector inside, prior art normally utilizes the mode of " forced convertion ", and radiator fan for example is set, and reaches the purpose that reduces temperature, to guarantee the stability of projector's long time continuous working.Yet radiator fan must occupy certain space, and is unfavorable for the trend of projector's miniaturization.Moreover the noise that radiator fan produced has also been created a problem that need further overcome for projector.
Therefore, if can under the prerequisite that radiator fan is not set, solve the heat dissipation problem of projector, can improve the problem that prior art exists in the mode of " natural convection ".
Summary of the invention
Supervise in the existing problem of prior art, the present invention provides a kind of projector and heat dissipating method thereof that utilizes the natural convection mode to dispel the heat.
The objective of the invention is to, a kind of projector and heat dissipating method thereof are provided, it can utilize the natural convection mode to reach the purpose of projector heat radiation.
A kind of projector of the present invention is characterized in that, comprises:
One housing, this housing are made by the material of a high heat conduction;
One light supply apparatus, this light supply apparatus are to be arranged in this housing; And
At least one radiating fin, this at least one radiating fin are to be arranged on this housing, to increase the area of dissipation of this housing;
Thus, this projector can be loose by the mode of a natural convection and remove the heat energy that it produced.
Wherein this projector is a portable projector.
Wherein this light supply apparatus is a light-emitting diode assembly.
Wherein the material of this high heat conduction is aluminium or almag.
Wherein this housing further comprises at least one louvre.
Wherein further comprise a heat-conducting plate, wherein this light supply apparatus is to be connected by this heat-conducting plate and this housing.
Further comprise:
One heat energy sensor electrically connects with this light supply apparatus;
One controller electrically connects with this heat energy sensor, and when the temperature that detects this light supply apparatus when this heat energy sensor is elevated to one first predetermined value, this controller will change the power of this light supply apparatus of driving, to reduce the heat energy that this light supply apparatus is produced.
Wherein this heat energy sensor is a thermistor element.
When wherein the temperature that detects this light supply apparatus when this heat energy sensor is reduced to one second predetermined value, this controller will improve the power that drives this light supply apparatus.
The heat dissipating method of a kind of projector of the present invention can be loose by the mode of a natural convection and remove the heat energy that this projector produced, and this projector has a light supply apparatus, it is characterized in that, this heat dissipating method comprises following steps:
Detect the temperature of the heat energy that this light supply apparatus produces; And
When the temperature of the heat energy that this light supply apparatus produced is elevated to one first predetermined value, change the power that drives this light supply apparatus, to reduce the heat energy that this light supply apparatus is produced.
Wherein further comprise following steps:
When the temperature of the heat energy that this light supply apparatus produced is reduced to one second predetermined value, improve the power that drives this light supply apparatus.
In one embodiment of this invention, projector of the present invention has more a heat energy sensor and a controller.Wherein, the heat energy sensor is to electrically connect with light supply apparatus: and controller and the electric connection of heat energy sensor.When temperature that the salty survey device of heat energy detects light supply apparatus is elevated to one first predetermined value (for example approximately between 25 ℃-35 ℃ Celsius), controller will change the power of driving light source device, with the reduction heat energy that light supply apparatus was produced.When temperature that the heat energy sensor detects light supply apparatus is reduced to one second predetermined value (for example approximately between 5 ℃-10 ℃ Celsius), controller will improve the power of driving light source device.
In one embodiment of this invention, housing further comprises at least one louvre; Light supply apparatus is to be connected by a heat-conducting plate and housing; And the heat energy sensor is a thermistor element.
In addition, the present invention provides a kind of heat dissipating method of projector in addition, and it can be applicable to projector of the present invention, and is loose except that the heat energy that projector produced by the mode of natural convection.Method of the present invention comprises following steps: the temperature of the heat energy that is produced by heat energy sensor detected light source apparatus; When the temperature of the heat energy that light supply apparatus produced is elevated to one first predetermined value, controller will change the power of driving light source device, to reduce the heat energy that light supply apparatus was produced: and when the temperature of the heat energy that light supply apparatus was produced is reduced to one second predetermined value, controller will improve the power of driving light source device.
In one embodiment of this invention, method of the present invention further comprises following steps: setting first predetermined value is about 25-35 degree Celsius; And to set second predetermined value be about 5-10 degree Celsius.
Description of drawings
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, cited below particularlyly go out preferred embodiment, and conjunction with figs., be described in detail below, wherein:
Fig. 1 is the schematic appearance according to projector of the present invention.
Fig. 2 is the schematic internal view according to projector of the present invention.
Fig. 3 is the configuration schematic diagram according to light supply apparatus of the present invention and heat energy sensor.
Fig. 4 is the structural representation according to light supply apparatus of the present invention and heat energy sensor.
Fig. 5 is the flow chart of steps according to heat dissipating method of the present invention.
Fig. 6 is the flow chart of steps according to heat dissipating method of the present invention.
Embodiment
For small-sized portable projector, if use fan in cooling system, possibility is because of the inefficacy or the damage of fan, and the fiduciary level of attenuating system.Simultaneously, fan also can increase system noise, bring dust and extra negative factors such as electricity needs.
Therefore, the present invention provides a kind of projector that utilizes the natural convection mode to dispel the heat, and it can use on small-sized portable projector, particularly with the small-sized portable projector of light emitting diode as light source.Because the heat energy that light emitting diode produced can be too not high, therefore do not need as prior art, use the complicated radiating mode of forced convertion.
Below please refer to the portable projector that Fig. 1 and Fig. 2 dispel the heat about employing natural convection mode of the present invention.Wherein, Fig. 1 is the schematic appearance according to projector of the present invention; Fig. 2 is the schematic internal view according to projector of the present invention.
As shown in Figure 1, projector 1 provided by the present invention has housing 2, and housing 2 is provided with louvre 32,33 and radiating fin 44.Wherein, housing 2 is to adopt the material of high heat conduction to make, and is for example made by aluminium or almag.
In a preferred embodiment of the present invention, except louvre shown in Figure 1 32,33, the present invention can also set up some louvres at other suitable positions of housing 2, to increase the radiating efficiency of projector 1.Moreover, because the radiating mode of natural convection needs bigger area of dissipation usually, so the present invention can also set up some radiating fins at other suitable positions of housing 2 except radiating fin shown in Figure 1 44, with the increase area of dissipation, and reach preferable radiating effect.
As shown in Figure 2, projector 1 provided by the present invention is provided with light supply apparatus 5, optics module 6, light engine 7 and heat energy sensor 8 in the inside of housing 2.Wherein, light supply apparatus 5 preferablies are a light-emitting diode assembly, so that the heat that light supply apparatus 5 produces can reduce as far as possible.
In a preferred embodiment of the present invention, light supply apparatus 5 is to be combined with housing 2 by heat conduction slope 55, and so the heat energy that can light supply apparatus 5 be produced by heat-conducting plate 55 is diffused on the housing 2 equably, to quicken radiating efficiency.
Then, please refer to Fig. 3, it shows the configuration schematic diagram according to light supply apparatus 5 of the present invention and heat energy sensor 8.
As shown in Figure 3, light supply apparatus 5 is provided with light emitting diode 51,52 and 53, and it can send redness, blueness and green light respectively.Owing to use light emitting diode known as prior art, do not repeat them here as the technology of light source of projector.
Projector of the present invention 1 is that with the difference of prior art light supply apparatus 5 of the present invention also is provided with a heat energy sensor 8, the heat energy that is produced in order to detected light source apparatus 5.
In a preferred embodiment of the present invention, heat energy sensor 8 also can be arranged at other positions of projector 1.As long as heat energy sensor 8 can electrically connect with light supply apparatus 5, can reach purpose of the present invention.And heat energy sensor 8 preferably is a thermistor element.
Below please refer to Fig. 4, it shows according to the structural representation of heat energy sensor 8 of the present invention with light supply apparatus 5.
As shown in Figure 4, heat energy sensor 8 is to be electrically connected to each other with light supply apparatus 5, controller 9 and power supply unit 10.When the temperature that detects the heat energy that light supply apparatus 5 produced when heat energy sensor 8 had been elevated to one first predetermined value (between for example about 25 ℃-35 ℃), expression projector 1 may be overheated, and the needs that reduce the heat energy that light supply apparatus 5 produced are arranged.At this moment, heat energy sensor 8 can be sent to this signal controller 9, and control power supply unit 10, the power of change driving light source device 5.
Because electric current by the thermal effect (being power) that conductor produced is: P=VI.Wherein, V is a voltage; I is an electric current.Therefore, in one embodiment of this invention, the present invention can be exported to the electric current of light supply apparatus 5 by minimizing, and reduces the thermal effect that light supply apparatus 5 is produced.Be noted that herein that only changing electric current is a kind of mode of the present invention in order to the power of change driving light source device 5, the present invention also can utilize other modes to reach identical purpose.For example, the present invention also can be exported to the voltage of light supply apparatus 5 by minimizing, and reduces the thermal effect that light supply apparatus 5 is produced.
Similarly, when the temperature that detects the heat energy that light supply apparatus 5 produced when heat energy sensor 8 has been reduced to one second predetermined value (between for example about 5 ℃-10 ℃), expression projector 1 is not overheated, therefore heat energy sensor 8 can be sent to this signal controller 9, and control power supply unit 10, the power of increase driving light source device 5.
In addition, the present invention provides a kind of heat dissipating method of projector in addition, and it can be applicable to according in the projector 1 of the present invention, removes the purpose of the heat energy that projector 1 produced and reach to loose with natural convection.
Below please refer to Fig. 5, it shows the flow chart of steps according to heat dissipating method of the present invention.As shown in Figure 5, method of the present invention comprises step S51, S52 and S53.
At first, the present invention carries out step S51, the temperature of the heat energy that is produced by heat energy sensor 8 detected light source apparatus 5.
When the temperature of the heat energy that light supply apparatus 5 is produced is elevated to one first predetermined value (between for example about 25 ℃-35 ℃), the present invention will carry out step S52, by controller 9 control power supply units 10, and the power of reduction driving light source device 5, to reduce the heat energy that light supply apparatus 5 is produced.
Perhaps, when the temperature of the heat energy that light supply apparatus 5 is produced is reduced to one second predetermined value (between for example about 5 ℃-10 ℃), the present invention will carry out step S53, by controller 9 control power supply units 10, and the power of raising driving light source device 5.
In addition, in one embodiment of this invention, method of the present invention also can repeat above-mentioned step S51, S52 and S53 as shown in Figure 6, at any time light supply apparatus 5 is carried out heat energy control.
So, can use projector provided by the present invention and heat dissipating method, and reach the diffusing purpose of removing the heat energy of projector of mode, and projector 1 of the present invention can stably be worked under suitable working temperature with natural convection.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this operator; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when looking accompanying being as the criterion that claim defines.
Claims (11)
1. a projector is characterized in that, comprises:
One housing, this housing are made by the material of a high heat conduction;
One light supply apparatus, this light supply apparatus are to be arranged in this housing; And
At least one radiating fin, this at least one radiating fin are to be arranged on this housing, to increase the area of dissipation of this housing;
Thus, this projector can be loose by the mode of a natural convection and remove the heat energy that it produced.
2. projector as claimed in claim 1 is characterized in that, wherein this projector is a portable projector.
3. projector as claimed in claim 1 is characterized in that, wherein this light supply apparatus is a light emitting diode (LED) device.
4. projector as claimed in claim 1 is characterized in that, wherein the material of this high heat conduction is aluminium or almag.
5. projector as claimed in claim 1 is characterized in that wherein this housing further comprises at least one louvre.
6. projector as claimed in claim 1 is characterized in that, wherein further comprises a heat-conducting plate, and wherein this light supply apparatus is to be connected by this heat-conducting plate and this housing.
7. projector as claimed in claim 1 is characterized in that, further comprises:
One heat energy sensor electrically connects with this light supply apparatus;
One controller electrically connects with this heat energy sensor, and when the temperature that detects this light supply apparatus when this heat energy sensor is elevated to one first predetermined value, this controller will change the power of this light supply apparatus of driving, to reduce the heat energy that this light supply apparatus is produced.
8. projector as claimed in claim 7 is characterized in that, wherein this heat energy sensor is a thermistor element.
9. projector as claimed in claim 7 is characterized in that, when wherein the temperature that detects this light supply apparatus when this heat energy sensor is reduced to one second predetermined value, this controller will improve the power that drives this light supply apparatus.
10. the heat dissipating method of a projector can be loose by the mode of a natural convection and remove the heat energy that this projector produced, and this projector has a light supply apparatus, it is characterized in that, this heat dissipating method comprises following steps:
Detect the temperature of the heat energy that this light supply apparatus produces; And
When the temperature of the heat energy that this light supply apparatus produced is elevated to one first predetermined value, change the power that drives this light supply apparatus, to reduce the heat energy that this light supply apparatus is produced.
11. heat dissipating method as claimed in claim 10 is characterized in that, wherein further comprises following steps:
When the temperature of the heat energy that this light supply apparatus produced is reduced to one second predetermined value, improve the power that drives this light supply apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510074328 CN1873522A (en) | 2005-06-01 | 2005-06-01 | Projector, and method of heat elimination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510074328 CN1873522A (en) | 2005-06-01 | 2005-06-01 | Projector, and method of heat elimination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1873522A true CN1873522A (en) | 2006-12-06 |
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ID=37484028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510074328 Pending CN1873522A (en) | 2005-06-01 | 2005-06-01 | Projector, and method of heat elimination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1873522A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713905B (en) * | 2008-10-06 | 2011-06-22 | 鸿富锦精密工业（深圳）有限公司 | Light path engine and projector using same |
| US7989747B2 (en) | 2007-08-31 | 2011-08-02 | Hon Hai Precision Industry Co., Ltd. | Projector having a controlled rechargeable cell and heat dissipation system of the projector for cool down after power off |
| CN104950565A (en) * | 2015-07-07 | 2015-09-30 | 苏州佳世达光电有限公司 | Projection device |
| CN108445699A (en) * | 2015-05-12 | 2018-08-24 | 苏州佳世达光电有限公司 | Projection arrangement |
-
2005
- 2005-06-01 CN CN 200510074328 patent/CN1873522A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7989747B2 (en) | 2007-08-31 | 2011-08-02 | Hon Hai Precision Industry Co., Ltd. | Projector having a controlled rechargeable cell and heat dissipation system of the projector for cool down after power off |
| CN101713905B (en) * | 2008-10-06 | 2011-06-22 | 鸿富锦精密工业（深圳）有限公司 | Light path engine and projector using same |
| US8092026B2 (en) | 2008-10-06 | 2012-01-10 | Hon Hai Precision Industry Co., Ltd. | Optical engine and projector using same |
| CN108445699A (en) * | 2015-05-12 | 2018-08-24 | 苏州佳世达光电有限公司 | Projection arrangement |
| CN104950565A (en) * | 2015-07-07 | 2015-09-30 | 苏州佳世达光电有限公司 | Projection device |
| CN104950565B (en) * | 2015-07-07 | 2017-07-25 | 苏州佳世达光电有限公司 | Projection arrangement |
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