CN1746766A - Radiating system and method for projector - Google Patents
Radiating system and method for projector Download PDFInfo
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- CN1746766A CN1746766A CN 200410074624 CN200410074624A CN1746766A CN 1746766 A CN1746766 A CN 1746766A CN 200410074624 CN200410074624 CN 200410074624 CN 200410074624 A CN200410074624 A CN 200410074624A CN 1746766 A CN1746766 A CN 1746766A
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- power supply
- heat
- projector
- heat abstractor
- electric storage
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Abstract
A heat radiation method of projector sets an electricity storage unit in projector for supplying real time power onto heat radiation unit to maintain running of heat radiation unit for carrying out follow - up heat radiation on lighting source when projector power supply is switched off and there is no external power supply to heat radiation unit.
Description
Technical field
The invention relates to a kind of cooling system and heat dissipating method of projector, be meant cooling system and method when external power source is unable to supply to projector especially, can dispel the heat fully after use is closed, increase serviceable life to guarantee luminous the coming from of projector.
Background technology
In working now, all must make speech and PowerPoint unavoidably to intra-company or external client, no matter yet be to intra-company, when the client does PowerPoint or speech, all need to fill a part preparation, quite consuming time, current lifting because of scientific and technological level, the development that makes goes out the multimedia presentation manuscript product of a lot of perfect in shape and functions, it is a program of significantly improving and simplify the required preparation of PowerPoint person, help the PowerPoint person can easily finish the work of speech, for example mobile computer and projector, PowerPoint person's the good assistant that can say so of projector wherein, projector color now is abundant distinct, volume is little, easy to carry, be not subjected to the influence of topography during use, as long as wall is arranged, see much just have much, multiple functional, can external many equipment, as computing machine, sound equipment etc. make the broadcast of computer animation in the PowerPoint and audio convenient.
Projector is for the needs of high brightness now, its light emitting source bulb mostly uses high-pressure sodium lamp, though raising brightness, but be to produce high heat when using, therefore the heat radiation of light emitting source just becomes the research and development of present projector and considers one of emphasis, at present luminous coming from when using can start radiator fan immediately, dispel the heat, but light emitting source close the back residual waste heat, still can cause very big damage to light emitting source, reduce serviceable life, so projector now is in order to eliminate the waste heat of light emitting source, after closing, light emitting source still can make radiator fan turn round an appropriate time to help heat radiation, improve the serviceable life of light emitting source, yet, for most of users, be the importance of not knowing follow-up heat radiation, after projector finishes using, promptly directly attaching plug is pulled out, cause radiator fan to turn round, cause the light emitting source waste heat to get rid of fully, and reduce serviceable life of light emitting source, perhaps, when radiator fan when turning round heat radiation at last, pulled out attaching plug by other common people unintentionally, also can cause same problem.
Therefore, the present invention is promptly at the cooling system and the heat dissipating method that propose a kind of projector at the problems referred to above, be can be when no external power source is supplied to projector, but still power supply makes the heat abstractor running, light emitting source is dispelled the heat, to address the above problem.
Summary of the invention
Fundamental purpose of the present invention is at projector's inner installing electric storage device, make luminous come from use close after, when external power source is unable to supply power supply to heat abstractor, but the electric storage device power supply allows heat abstractor keep on the go, dispel the heat, improve the serviceable life of light emitting source.
Another object of the present invention is that power supply to electric storage device charged when externally power supply regular supply power supply was to projector.
Another purpose of the present invention is the rotating speed of control heat abstractor, improves the radiating effect to light emitting source.
The cooling system of projector of the present invention, include at least one heat abstractor, one power supply change-over device, one electric storage device, an one switch module and a microprocessing unit, power supply change-over device receives outside AC power conversion output DC source to heat abstractor, the heat abstractor running is dispelled the heat to light emitting source, microprocessing unit control power supply change-over device and switch module, the keying of switch module is the power supply supply status of control electric storage device, when no external power source is supplied to power supply change-over device, electric storage device meeting power supply is to heat abstractor, allow heat abstractor keep on the go, light emitting source is finished follow-up heat radiation program, improve the serviceable life of light emitting source.
The heat dissipating method of projector of the present invention, be one electric storage device to be set in projector, the light emitting source of projector is after use is closed, receive a power supply change-over device of external power source can power supply to heat abstractor, light emitting source is dispelled the heat, and when externally power supply unavailability power supply is to power supply change-over device, electric storage device will be immediately power supply to heat abstractor, keep the running of heat abstractor, light emitting source is dispelled the heat, and then increase the serviceable life of light emitting source.
Description of drawings
Fig. 1 is the circuit block diagram of one embodiment of the invention;
Fig. 2 is the circuit block diagram of another embodiment of the present invention;
Fig. 3 is the circuit block diagram of yet another embodiment of the invention;
Fig. 4 is the circuit block diagram of further embodiment of this invention.
Symbol description:
10～power supply change-over device
15～external power source
20～stabilizer
25～light emitting source
30～heat abstractor
40～electric storage device
50～switch module
52～Power Management Unit
53～resistance
54～charge switch
55～resistance
56～power switch
57～diode
58～diode
60～circuit board
65～microprocessing unit
70～electric capacity
75～diode
80～switch module
82～power switch
84～diode
86～diode
88～diode
Embodiment
The present invention is at projector's inner installing electric storage device, when no external power source is supplied, is with the running of maintenance heat abstractor, and the light emitting source of projector to be dispelled the heat by the electric storage device power supply to heat abstractor, makes the serviceable life of improving light emitting source.
See also Fig. 1, the present invention includes a power supply change-over device 10, and it is to receive an external power source 15, AC power is converted to direct supply, and is supplied to each component equipment of projector; One light emitting source stabilizer 20 provides the steady operation power supply to a light emitting source 25, and light emitting source 25 is to can be bulb; At least one heat abstractor 30, it is to can be radiator fan, is used for light emitting source 25 heat radiations; At least one electric storage device 40 is used for supplying DC power source to heat abstractor 30 other visual plant with projector, and electric storage device 40 is to can be rechargeable battery.
One switch module 50 is states of control electric storage device 40 transmission power supplys, switch module 50 includes a Power Management Unit 52, Power Management Unit 52 is that a microprocessing unit 65 of being located at a circuit board 60 drives, Power Management Unit 52 is by the flow through change in voltage of a resistance 53 of detecting, whether detecting has current flowing, and then detecting learns whether power supply change-over device 10 has power supply, under the state that power supply is arranged, Power Management Unit 52 drives a charge switch 54 conductings, allow the power supply 54 pairs of electric storage devices 40 of charge switch of flowing through charge, Power Management Unit 52 is learnt the electric capacity of electric storage device 40 charge or discharge equally by the change in voltage of detecting a resistance 55 in addition, as the electric weight of electric storage device 40 when sufficient, Power Management Unit 52 promptly drives charge switch 54 and closes not conducting, allows electric storage device 40 stop charging.
When power supply change-over device 10 unavailability power supplys are learnt in Power Management Unit 52 detectings, drive a power switch 56 conductings immediately, make electric storage device 40 discharges, power supply is to heat abstractor 30 and microprocessing unit 65, diode 57 is when avoiding power supply change-over device 10 outages, the reverse inflow power supply change-over device 10 of the electric current of electric storage device 40, and diode 58 has fixed route for electric storage device 40 discharges, and avoid other electric current to flow into, switch module 50 is can integrate to be located on the circuit board 60; One electric capacity 70, it is under the state of power supply change-over device 10 unavailability power supplys, with discharge supply to microprocessing unit 65, and can avoid the electric current of electric capacity 70 by diode 75, reverse outflow, above-mentioned charge switch 54 and power switch 56 be can be field-effect transistor (Field EffectTransistor, FET) or two-carrier connect transistor (Bipolar Junction Transistor, BJT).
When the attaching plug of projector is plugged socket, when making external ac power source 15 flow into power supply change-over device 10, projector promptly is ready, this moment power supply change-over device 10 only power supply to the microprocessing unit 65 and the necessary element thereof of circuit board 60, so that receive the signal input that the detecting user pushes remote manipulator or pushing power switch, press the button or switch of power initiation as the user after, microprocessing unit 65 controls signal to power supply change-over device 10 with transmission, to begin providing power supply to stabilizer 20, and then driven for emitting lights source 25 is luminous, and provide power supply to turn round to the heat abstractor 30 of light emitting source 25 heat transmissions, in addition, Power Management Unit 52 also can drive charge switch 54 conductings, the power supply 54 pairs of electric storage devices 40 of charge switch of flowing through are charged, when Power Management Unit 52 detecting electric storage devices 40 power supply abundance, promptly control charge switch 54 and close not conducting, stop electric storage device 40 is charged, during above-mentioned power supply change-over device 10 power supplies, discharge switch 56 is in not on-state, and above-mentioned projector's state has promptly entered the state of normal operation.
When the user in using projector, and after pushing the button or switch of power-off, microprocessing unit 65 will send a control signal to power supply change-over device 10, order about power supply change-over device 10 stop supplies power supplys to stabilizer 20, promptly cut off the electricity supply to light emitting source 25, give heat abstractor 30 but still can continue power supply, carry out the follow-up heat radiation step of light emitting source 25, at this moment, microprocessing unit 65 also can be counted the heat radiation time of heat abstractor 30, after heat abstractor 30 runnings arrive the default heat radiation time, microprocessing unit 65 is to send a control signal to power supply change-over device 10, the stop supplies power supply shuts down heat abstractor 30, and projector returns back to holding state, in addition, microprocessing unit 65 can be detectd side control rotating speed when heat abstractor 30 runnings, improve the radiating effect to light emitting source 25.
After light emitting source 25 is closed, heat abstractor 30 is in carrying out the follow-up heat radiation stage, when being default heat radiation time no show of microprocessing unit 65, external power source 15 takes place suddenly do not have power supply to power supply change-over device 10, perhaps in projector's projection process, when the situation of power interruption takes place in external power source 15, electric storage device 40 immediately power supply to Power Management Unit 52, and Power Management Unit 52 is when detecting the output of power supply change-over device 10 non-transformers, to control power switch 56 conductings, allow electric storage device 40 discharge, power supply is through power switch 56, diode 58 is to heat abstractor 30, carry out follow-up heat radiation program, can guarantee that so light emitting source 25 finishes heat radiation, to improve serviceable life.
In addition, the power supply of electric storage device 40 also can be supplied to microprocessing unit 65 through diode 75, keep the running of microprocessing unit 65, when power supply change-over device 10 outage moment, electric capacity 70 also can the discharge supply power supply to microprocessing unit 65, so count down to the default heat radiation time until microprocessing unit 65, be that light emitting source 25 is finished heat radiation, microprocessing unit 65 sends a control signal to Power Management Unit 52 and closes power switch 56, stops the power supply of electric storage device 40, and projector returns back to holding state.
See also Fig. 2, it is the circuit block diagram of another embodiment of the present invention, this embodiment is different from an embodiment and is that microprocessing unit 65 is starts of may command stabilizer 20, when external power source 15 power supplies to power supply change-over device 10, be that projector is when being in holding state, power supply change-over device 10 except power supply to the microprocessing unit 65 and necessary element thereof of circuit board 60, also power supply is to stabilizer 20, when power initiation, microprocessing unit 65 will be except controlling power supply change-over device 10 power supplies to light emitting source 25 and heat abstractor 30, also send a control signal to stabilizer 20, order about and transmit power supply to light emitting source 25 runnings, and the user is behind the button of pushing power-off or switch, microprocessing unit 65 promptly transmits control signal to stabilizer 20, to light emitting source 25, stop the running of light emitting source 25 with the stop supplies power supply, all the other runnings all are same as an embodiment.
See also Fig. 3, it is the circuit block diagram of yet another embodiment of the invention, this embodiment is an easy cooling system, the switch module 80 of this embodiment is the switch modules 50 that are different from above-mentioned two embodiment, switch module 80 is only to use a charge switch 82, the state of control electric storage device 40 power supplies, the keying of charge switch 82 is subjected to the control of microprocessing unit 65, press the button or switch of power initiation as the user after, microprocessing unit 65 controls signal to power supply change-over device 10 and power switch 82 with transmission, make power supply change-over device 10 power supplies and allow power switch 82 conductings, at this moment, power supply change-over device 10 also can power supply to electric storage device 40, to charge.
When power supply change-over device 10 unavailability power supplys, electric storage device 40 promptly discharges because of voltage difference, through charge switch 82 out-put supplies to heat abstractor 30 and microprocessing unit 65, count down to the default heat radiation time until microprocessing unit 65, light emitting source is finished heat radiation, and microprocessing unit 65 sends a control signal to power switch 82, closes power switch 82, stop the power supply of electric storage device 40, projector returns back to holding state.Diode 84 and 86 is when avoiding power supply change-over device 10 outages, the reverse inflow power supply change-over device 10 of the electric current of electric storage device 40, and diode 88 has fixed route for electric storage device 40 discharges, and avoids other electric current to flow into.
Seeing also Fig. 4, is the circuit block diagram of further embodiment of this invention, and this embodiment is easy cooling system also, is different from an embodiment and is that microprocessing unit 65 is starts of may command stabilizer 20, and its control mode is as described in Fig. 2 embodiment.
When if heat abstractor 30 is the one 12 volts/radiator fan of 0.4 ampere (12V/0.4A), turn round approximately and can finish the follow-up heat radiation of light emitting source 25 bulbs in 2 minutes, and required electric weight is 5.67 milliampere Henry (5.67mAH), if electric storage device 40 is a rechargeable battery, it charges and discharge electric weight and is 80% of script, and circuit efficiency is 90% o'clock, then need 7.88 milliampere Henry (7.88mAH), when being the single nickel-hydrogen chargeable cell of 1.2 volts/1800～2200 milliampere Henry with specification, need 10 of series connection, so be but that power supply to radiator fan carries out the follow-up heat radiation stage, and the general assembly (TW) of 10 nickel-hydrogen chargeable cells only is about 250 grams, weight load is little; Because of projector inside belongs to Gao Re and high-tension environment, therefore selecting for use of electric storage device 40 is preferably higher nickel-hydrogen chargeable cell of security and lighium polymer (Li Polymer) rechargeable battery, and single lighium polymer charged battery voltage is 3.7 volts, therefore only needs 3 uses of series connection.
In sum, the cooling system of projector of the present invention and heat dissipating method, be at projector's inner installing electric storage device 40, to avoid heat abstractor 30 in the follow-up heat radiation stage of carrying out after light emitting source 25 is closed, and during external power source 15 unavailability power supplys, can't continue and carry out the follow-up heat radiation stage, reduce the serviceable life of light emitting source 25.
Claims (15)
1. the cooling system of a projector is characterized in that: the cooling system of described projector is that at least one light emitting source in projector uses and dispels the heat after closing, and this cooling system includes:
At least one heat abstractor dispels the heat to this light emitting source;
One power supply change-over device receives conversion one external power source, and power supply is to this heat abstractor;
One electric storage device, power supply is to this heat abstractor;
One switch module is controlled this electric storage device power supply to this heat abstractor;
One microprocessing unit is controlled this power supply change-over device and this switch module, and during this power supply change-over device unavailability power supply, this electric storage device power supply is to this microprocessing unit and this heat abstractor, makes this heat abstractor finish heat radiation to this light emitting source.
2. the cooling system of projector according to claim 1, it is characterized in that: this heat abstractor is to can be radiator fan.
3. the cooling system of projector according to claim 1, it is characterized in that: this electric storage device is to can be rechargeable battery.
4. the cooling system of projector according to claim 1, it is characterized in that: this switch module includes a Power Management Unit, one charge switch and a power switch, this Power Management Unit is controlled by this microprocessing unit, this Power Management Unit is detected the reserve of electricity of this electric storage device, controlling this charge switch opens and closes, control of the charging of this power supply change-over device to this electric storage device, this Power Management Unit is controlled this power switch and is opened and closed, during this power supply change-over device unavailability power supply, this power switch conducting, this electric storage device power supply is to this microprocessing unit and this heat abstractor.
5. the cooling system of projector according to claim 1, it is characterized in that: this switch module includes a power switch, opened and closed by this microprocessing unit control, during this power supply change-over device unavailability power supply, this electric storage device power supply is to this microprocessing unit and this heat abstractor.
6. the cooling system of projector according to claim 5 is characterized in that: but this power supply change-over device more power supply charge to this electric storage device.
7. the cooling system of projector according to claim 1 is characterized in that: more include a stabilizer, this power supply change-over device sees through this stabilizer power supply to this heat abstractor.
8. the cooling system of projector according to claim 7, it is characterized in that: this stabilizer is controlled by this microprocessing unit.
9. the cooling system of projector according to claim 1 is characterized in that: the outside AC power of this power supply change-over device reception, conversion output one direct current power supply.
10. the cooling system of projector according to claim 1, it is characterized in that: this microprocessing unit is the heat radiation time that can count this heat abstractor, after the suitable heat radiation time of arrival, be to drive this switch module to close, stop this electric storage device power supply to this heat abstractor.
11. the heat dissipating method of a projector, it is to be provided with an electric storage device in a projector, this projector at least one luminous come from use close after, this projector receives a power supply change-over device of external power source, power supply dispels the heat to this light emitting source at least one heat abstractor of this projector, and this power supply change-over device unavailability power supply is during to this heat abstractor, this electric storage device power supply dispels the heat to this light emitting source to this heat abstractor.
12. the heat dissipating method of projector according to claim 11, wherein this power supply change-over device is when power supply, and this power supply change-over device can charge to this electric storage device.
13. the heat dissipating method of projector according to claim 11, wherein in power supply when this heat abstractor dispels the heat, more include a step, it is the heat radiation time of this heat abstractor of counting, after the suitable heat radiation time of arrival, the stop supplies power supply is to this heat abstractor.
14. the heat dissipating method of projector according to claim 11, wherein this heat abstractor is to can be radiator fan.
15. the heat dissipating method of projector according to claim 11, wherein this electric storage device is to can be rechargeable battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100746244A CN100392515C (en) | 2004-09-09 | 2004-09-09 | Radiating system and method for projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100746244A CN100392515C (en) | 2004-09-09 | 2004-09-09 | Radiating system and method for projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1746766A true CN1746766A (en) | 2006-03-15 |
| CN100392515C CN100392515C (en) | 2008-06-04 |
Family
ID=36166352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100746244A Expired - Fee Related CN100392515C (en) | 2004-09-09 | 2004-09-09 | Radiating system and method for projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100392515C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721937A (en) * | 2011-03-30 | 2012-10-10 | 海洋王照明科技股份有限公司 | Aging test fixture of LED |
| CN103616793A (en) * | 2013-12-03 | 2014-03-05 | 广东威创视讯科技股份有限公司 | Projection machine cooling control method and related projection machine |
| CN104807557A (en) * | 2014-01-29 | 2015-07-29 | 中强光电股份有限公司 | Temperature detector and projector using same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05232267A (en) * | 1992-02-20 | 1993-09-07 | Fujitsu General Ltd | Power source apparatus for projection type display device |
| CN2459674Y (en) * | 2000-11-30 | 2001-11-14 | 封燕鸣 | Color projector |
| JP2003233130A (en) * | 2002-02-07 | 2003-08-22 | Sanyo Electric Co Ltd | Liquid crystal projector |
-
2004
- 2004-09-09 CN CNB2004100746244A patent/CN100392515C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721937A (en) * | 2011-03-30 | 2012-10-10 | 海洋王照明科技股份有限公司 | Aging test fixture of LED |
| CN102721937B (en) * | 2011-03-30 | 2016-01-13 | 海洋王照明科技股份有限公司 | The aging test frock of LED |
| CN103616793A (en) * | 2013-12-03 | 2014-03-05 | 广东威创视讯科技股份有限公司 | Projection machine cooling control method and related projection machine |
| CN104807557A (en) * | 2014-01-29 | 2015-07-29 | 中强光电股份有限公司 | Temperature detector and projector using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100392515C (en) | 2008-06-04 |
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