CN102314065A - Projection device and light source temperature adjusting method thereof - Google Patents
Projection device and light source temperature adjusting method thereof Download PDFInfo
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- CN102314065A CN102314065A CN2010102315296A CN201010231529A CN102314065A CN 102314065 A CN102314065 A CN 102314065A CN 2010102315296 A CN2010102315296 A CN 2010102315296A CN 201010231529 A CN201010231529 A CN 201010231529A CN 102314065 A CN102314065 A CN 102314065A
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- temperature
- operating temperature
- light source
- cooling power
- cooling
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Abstract
The invention relates to a projection device and a light source temperature adjusting method thereof. The projection device comprises a light source, a cooling unit and a control unit, wherein the light source has operation temperature; the cooling unit has cooling capacity for providing for the light source; and the control unit can actively adjust the cooling capacity of the cooling unit so that the operation temperature of the light source changes within a temperature range.
Description
Technical field
The invention relates to a kind of projection arrangement and light-source temperature control method thereof; Particularly relevant to initiatively adjusting the cooling power of cooling unit, so the operating temperature that makes light source in one interval in the projection arrangement and the light-source temperature control method of variation.
Background technology
Projection arrangement has image frame is projected on large-sized display screen, and the advantage that supplies numerous users together to appreciate is applied to meeting occasion or family's theater at large.And along with the progress of science and technology and technology, the development trend of projection arrangement also is more convenient for carrying and direction such as the high lumen of high brightness develops towards volume is frivolous.
Existing projection arrangement, normally with single or a plurality of bulbs as light source, the light that it produced is through various optical element, finally forms an image and is projected on the display screen, supplies the user to view and admire.Because the inner element running of projection arrangement all possibly produce heat energy simultaneously; Especially light source is generally highest temperature place; So can dispose a cooling unit usually; In order to assist the heat radiation of light source after lighting, cause other inner element of bulb itself or projection arrangement impaired to avoid too high working temperature.
Please join Fig. 1, be depicted as the operating temperature curve of light source in the existing projection arrangement, after the projection arrangement starting, put bright light source immediately, light source will be promoted to a working temperature fast from room temperature.Wherein, because the specification of the light source of being selected for use promptly is preset with a maximum safety temperature T
MaxAn and minimum suggestion temperature T
Min, and its best work temperature
MNormally between maximum safety temperature T
MaxAnd minimum suggestion temperature T
MinBetween in the scope that defined.Therefore, existing projection arrangement can be provided with the fan of fixed rotating speed or fixed voltage usually, blows cooling airflow towards light source or wick, to remove the heat that light source is produced, makes its working temperature shown in the curve of Fig. 1, fixedly is maintained at maximum safety temperature T
MaxAnd minimum suggestion temperature T
MinBetween scope in.
Yet, because the wick of each bulb all has its other physical characteristics, therefore if only same and fixing cooling airflow is provided, though its working temperature still can fall within maximum safety temperature T reluctantly
MaxAnd minimum suggestion temperature T
MinBetween in the scope that defined, but the not enough or long-term supercooled situation of cooling may appear being in for a long time.Wherein, if be in the not enough state of cooling for a long time, then the long-time temperature drift of wick causes quartzy crystallization more easily, and has albinism to take place; Otherwise if be in supercooled state for a long time, then the long-time temperature of wick is on the low side, causes halogen cycle bad easily, and has melanism to occur.No matter be the albefaction or the melanism of wick, both all produce harmful effect to the usability and the life-span of bulb.
In view of this, in existing optical system, a kind of light source projection arrangement and light-source temperature control method thereof in serviceable life of prolonging is provided, this is this industry problem demanding prompt solution.
Summary of the invention
A purpose of the present invention is to provide a kind of projection arrangement and light-source temperature control method thereof; It has the cooling unit that can initiatively adjust cooling power; The operating temperature of light source can be changed in the specified temp interval; But not being in fixing operating temperature for a long time, the situation of albefaction or melanism appears to avoid wick.
Another object of the present invention is to provide a kind of projection arrangement and light-source temperature control method thereof, the cooling unit of active conversion cooling power, the operating temperature that can be designed to assist light source is carried out periodically or the temperature variation of multisection type in the specified temp interval.
For reaching above-mentioned purpose, the present invention discloses a kind of projection arrangement, and it comprises a light source, a cooling unit and a control module.The operating temperature that light source definition one can testedly measure; Cooling unit has at least one cooling power to provide to light source; And control module can be adjusted at least one cooling power on one's own initiative; Thereby the operating temperature of light source can change in a temperature range in response at least one cooling power of cooling unit.
The present invention also discloses a kind of light-source temperature control method that is used for above-mentioned projection arrangement, comprises the following step: first operating temperature and second operating temperature that determine this light source; In response to this first operating temperature and this second operating temperature, determine first cooling power and second cooling power of this cooling unit; And adjust this first cooling power or this second cooling power on one's own initiative, and provide to this light source.
Useful technique effect of the present invention is: the cooling power that can initiatively adjust cooling unit; The operating temperature of light source can be changed in the specified temp interval; But not be in fixing operating temperature for a long time; Can effectively avoid wick the situation of albefaction or melanism to occur, and then prolong the serviceable life of light source.
Description of drawings
For letting above-mentioned purpose, technical characterictic and the advantage can be more obviously understandable, hereinafter be elaborated conjunction with figs. to preferred embodiment of the present invention, wherein:
Fig. 1 is the synoptic diagram that the light-source temperature of existing projection arrangement changes;
Fig. 2 is the synoptic diagram of projection arrangement of the present invention;
Fig. 3～Fig. 8 is the synoptic diagram that the light-source temperature of projection arrangement of the present invention changes; And
Fig. 9 is the process flow diagram of light-source temperature control method of the present invention.
Embodiment
Fig. 2 and Fig. 3 are respectively the synoptic diagram of projection arrangement of the present invention and the synoptic diagram that light-source temperature changes thereof.Wherein, as shown in Figure 2, projection arrangement 2 comprises a light source 21, a cooling unit 23 and a control module 25.Light source 21 is arranged at projection arrangement 2 inside, after light source 21 is lighted in the operating temperature T that can testedly measure
O Running.Cooling unit 23 is preferably contiguous light source 21 and is provided with, and has at least one cooling power, to provide to light source 21, for example produces and guides a cooling airflow 22 to blow towards light source 21.Control module 25 to adjust on one's own initiative, makes the operating temperature T of light source 21 in order to control the cooling power that cooling unit 23 is provided
OIn a permissible temperature range T
RThe interior variation.
In fact, light source 21 is preferably a high-pressure sodium lamp, and it has a wick, and wick is generally the temperature highest point; And the cooling unit 23 preferable fans that comprise, the cooling airflow 22 that is produced blows towards this wick, so that it is cooled off.Control module 25 is through controlling size or the flow velocity that cooling unit 23 changes cooling airflow 22, and adjusts this cooling power.Control module 25 is controlled the mode of cooling unit 23 can be through rotating speed or the voltage of initiatively adjusting this fan, and then change the size or the flow velocity of cooling airflow 22.
Please continue to consult Fig. 3, temperature range T
RBe maximum safety temperature T by light source 21
MaxAnd minimum suggestion temperature T
MinThe common definition of institute; Well imagine the operating temperature T of light source 21
OBe to fall within temperature range T
R, that is be lower than maximum safety temperature T
MaxAnd be higher than minimum suggestion temperature T
MinCharacteristic of the present invention is, operating temperature T
OFit the cooling power that can adjust cooling units 23 through control module 25, and in temperature range T
RIn change.
In detail, at least one cooling power of this of cooling unit 23 comprises first cooling power and second cooling power, and this first cooling power is less than this second cooling power.The operating temperature T of light source 21
OIn response to this first cooling power and this second cooling power, comprise the first operating temperature T at least
HAnd the second operating temperature T
L, and the first operating temperature T
HBe to be higher than the second operating temperature T
LBecause the first operating temperature T
HAnd the second operating temperature T
LAll fall within temperature range T
RIn, so the first operating temperature T
HBe to be less than or equal to maximum safety temperature T
Max, and the second operating temperature T
LBe to be greater than or equal to minimum suggestion temperature T
Min
Through controlling of control module 25, this first cooling power (for example fan is in low speed state) of cooling unit 23 can act preferentially on this wick, makes the operating temperature T of light source
OBe maintained at the first operating temperature T
HAfter a period of time, change again, make the operating temperature T of light source by this second cooling power (for example fan is in high-speed state) effect
ODrop to the second operating temperature T
LThis kind makes operating temperature T
OThe low single changing pattern in earlier high back, the wick that promptly is enough to avoid bulb in the projection arrangement 2 be because of being in same temperature (possibly be cooling deficiency or cool off excessive) for a long time, and cause wick the situation of albefaction or melanism to occur.
Except that the adjustment mode shown in above-mentioned Fig. 3, control module 25 also can be as shown in Figure 5, changes earlier with this second cooling power to act on this wick, treats the operating temperature T of light source
OBe maintained at the second operating temperature T
LAfter a period of time, change again, make the operating temperature T of light source by the first lower cooling power effect
ORise to the first operating temperature T gradually
H, make operating temperature T
OThe high single variation pattern in low earlier back is controlled cooling unit 23.In addition, as shown in Figure 6, also can make operating temperature T
OTo hang down the mode of the high periodic cycle in back earlier, carry out the adjustment of the cooling power of cooling unit 23.
Please further with reference to figure 7, light source 21 has an initial temperature T
S(it is higher than the first operating temperature T
H, but still less than maximum safety temperature T
Max).When light source 21 self-startings to initial temperature T
SCompletion is lit a lamp after the operation, and cooling unit 23 is fitted and can this first cooling power or this second cooling power be provided to light source 21, thereby carries out above-mentioned operating temperature T for light source 21
OPeriodicity adjustment.
Below will describe, please refer to Fig. 8 to one embodiment of the invention.The operating temperature T that light source 21 definition one of projection arrangement 2 can testedly measure
O, can be through the adjustment of carrying out temperature of controlling of control module 25.Maximum safety temperature T in the present embodiment
Max=920 ℃, minimum suggestion temperature T
Min=860 ℃, the first operating temperature T
H=900 ℃, the second operating temperature T
L=880 ℃ and initial temperature T
S=910 ℃.When desiring to light the bulb of projection arrangement 2, the operating temperature T of light source 21
OBe heated about 10 minutes time to reach 910 ℃ and accomplish the step of lighting a lamp from 25 ℃ of room temperatures.As operating temperature T
OA period of time after arriving 910 ℃, cooling unit 23 provides this second cooling power to light source 21, makes operating temperature T
ODrop to 880 ℃, after 15 minutes, control module 25 is adjusted cooling unit 23 on one's own initiative, changes by this first cooling power to light source 21 is provided, at this moment operating temperature T
ORise to 900 ℃.After 10 minutes, control module 25 is adjusted cooling unit 23 once more on one's own initiative, and this second cooling power to light source 21 is provided, and makes operating temperature T
ODrop to 880 ℃ once more, repeat this initiatively set-up procedure then, thereby make operating temperature T
OIn 900 ℃ to 880 ℃ temperature range, change, occur the situation of albefaction or melanism with the wick of delaying bulb as far as possible.
Be noted that the numerical value of above-mentioned each temperature and time parameter are only in order to discuss enforcement aspect of the present invention, and be non-in order to limit technical scheme of the present invention.This at least one cooling power is except that having above-mentioned first cooling power and second cooling power; Also can further have one the 3rd cooling power and one the 4th cooling power; And enforcement aspects such as corresponding the 3rd operating temperature and the 4th operating temperatures, but not as limit.Implement in the aspect at other; Control module 25 can be adjusted cooling unit 23 on one's own initiative and in variant operating temperature interval, change; Make the wick of bulb can avoid the not enough or supercooled situation of long-term cooling, be able to reduce as far as possible the situation of wick albefaction and melanism.
Another embodiment of the present invention is a kind of light-source temperature control method that is used for projection arrangement 2, shown in the process flow diagram of Fig. 9.At first execution in step 901, according to the maximum safety temperature T of light source 21
MaxAnd minimum suggestion temperature T
Min, definition temperature range T
RThen, execution in step 902, the first operating temperature T of decision light source 21
HAnd the second operating temperature T
L, this first operating temperature T
HAnd this second operating temperature T
LBe positioned at this temperature range T
RIn, this first operating temperature T wherein
HBe to be less than or equal to this maximum safety temperature T
Max, this second operating temperature T
LBe to be greater than or equal to this minimum suggestion temperature T
MinFollow execution in step 903, in response to this first operating temperature T
HAnd this second operating temperature T
L, first cooling power and second cooling power of decision cooling unit 23; Then, execution in step 904, some bright light source 21 to one initial temperature T
S, this initial temperature T
SBe higher than this first operating temperature T
HAt last, execution in step 905 is adjusted this first cooling power or this second cooling power on one's own initiative, and is provided to this light source, is preferably this first cooling power and this second cooling power of periodically switching this cooling fluid.
Through the technology that the present invention disclosed; Can initiatively adjust the cooling power of cooling unit; The operating temperature of light source can be changed in the specified temp interval; But not be in fixing operating temperature for a long time, can effectively avoid wick the situation of albefaction or melanism to occur, and then prolong the serviceable life of light source.
The above embodiments enforcement aspect of the present invention that only is used for giving an example, and explain technical scheme of the present invention, be not to be used for limiting protection 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, rights protection scope of the present invention should be as the criterion with claim.
Claims (15)
1. projection arrangement comprises:
One light source, the operating temperature that definition can testedly measure;
One cooling unit has at least one cooling power, provides to this light source; And
One control module, this at least one cooling power of adjustment on one's own initiative;
By this, the operating temperature of this light source changes in a temperature range in response to this at least one cooling power of this cooling unit.
2. projection arrangement according to claim 1 is characterized in that this light source is a high-pressure sodium lamp, has a wick.
3. projection arrangement according to claim 2; It is characterized in that this cooling unit comprises a fan, blow towards this wick in order to produce a cooling airflow; Producing this cooling power, this control module is that size through changing this cooling airflow is to adjust this cooling power.
4. projection arrangement according to claim 3 is characterized in that, the rotating speed of this this fan of control module adjustment.
5. projection arrangement according to claim 3 is characterized in that, the voltage of this this fan of control module adjustment.
6. projection arrangement according to claim 3 is characterized in that, this temperature range is to be defined by a maximum safety temperature and a minimum suggestion temperature, and this operating temperature is to be lower than this maximum safety temperature and to be higher than this minimum suggestion temperature.
7. projection arrangement according to claim 6; It is characterized in that; At least one cooling power of this of this cooling unit comprises one first cooling power and one second cooling power, and this first cooling power is less than this second cooling power, and the operating temperature of this light source is in response to this first cooling power and this second cooling power; At least comprise one first operating temperature and one second operating temperature, this first operating temperature is to be higher than this second operating temperature.
8. projection arrangement according to claim 7 is characterized in that, this first operating temperature is to be less than or equal to this maximum safety temperature, and this second operating temperature is to be greater than or equal to this minimum suggestion temperature.
9. projection arrangement according to claim 8 is characterized in that, this control module is periodically adjusted this first cooling power and this second cooling power of this cooling unit.
10. projection arrangement according to claim 9 is characterized in that, this light source also has an initial temperature, is higher than this first operating temperature, and when this light source started to this initial temperature, this cooling unit should at least one cooling power provide to this light source.
11. a light-source temperature control method that is used for a projection arrangement, this projection arrangement comprises a light source and a cooling device, and this method comprises the following step:
Determine one first operating temperature and one second operating temperature of this light source;
In response to this first operating temperature and this second operating temperature, determine one first cooling power and one second cooling power of this cooling unit;
Adjust this first cooling power or this second cooling power on one's own initiative, and provide to this light source.
12. method according to claim 11 is characterized in that, determines also to comprise a step before the step of one first operating temperature and one second operating temperature of this light source:
A maximum safety temperature and a minimum suggestion temperature based on this light source define a temperature range, and this first operating temperature and this second operating temperature are in this temperature range.
13. method according to claim 12 is characterized in that, this first operating temperature is to be less than or equal to this maximum safety temperature, and this second operating temperature is to be greater than or equal to this minimum suggestion temperature.
14. method according to claim 11 is characterized in that, adjusts on one's own initiative before the step of this first cooling power or this second cooling power, also comprises a step:
Light the initial temperature of this light source to one, this initial temperature is higher than this first operating temperature.
15. method according to claim 11 is characterized in that, adjusts the step of this cooling unit on one's own initiative, is this first cooling power and this second cooling power of periodically switching this cooling fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010231529.6A CN102314065B (en) | 2010-07-08 | 2010-07-08 | Projection device and light source temperature adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010231529.6A CN102314065B (en) | 2010-07-08 | 2010-07-08 | Projection device and light source temperature adjusting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102314065A true CN102314065A (en) | 2012-01-11 |
| CN102314065B CN102314065B (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010231529.6A Expired - Fee Related CN102314065B (en) | 2010-07-08 | 2010-07-08 | Projection device and light source temperature adjusting method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN102314065B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000131763A (en) * | 1998-10-26 | 2000-05-12 | Minolta Co Ltd | Projector |
| US6419364B2 (en) * | 1998-07-16 | 2002-07-16 | Seiko Epson Corporation | Projection display device |
| JP2004133107A (en) * | 2002-10-09 | 2004-04-30 | Sanyo Electric Co Ltd | Liquid crystal projector |
| JP2005195783A (en) * | 2004-01-06 | 2005-07-21 | Funai Electric Co Ltd | Image display projector |
| US20080170395A1 (en) * | 2007-01-11 | 2008-07-17 | Coretronic Corporation | Double light module |
| CN101373315A (en) * | 2007-08-21 | 2009-02-25 | 佳世达科技股份有限公司 | Projector and method for cooling light source module discharging part |
| CN102763033A (en) * | 2010-02-25 | 2012-10-31 | 皇家飞利浦电子股份有限公司 | Method of cooling a lamp |
-
2010
- 2010-07-08 CN CN201010231529.6A patent/CN102314065B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6419364B2 (en) * | 1998-07-16 | 2002-07-16 | Seiko Epson Corporation | Projection display device |
| JP2000131763A (en) * | 1998-10-26 | 2000-05-12 | Minolta Co Ltd | Projector |
| JP2004133107A (en) * | 2002-10-09 | 2004-04-30 | Sanyo Electric Co Ltd | Liquid crystal projector |
| JP2005195783A (en) * | 2004-01-06 | 2005-07-21 | Funai Electric Co Ltd | Image display projector |
| US20080170395A1 (en) * | 2007-01-11 | 2008-07-17 | Coretronic Corporation | Double light module |
| CN101373315A (en) * | 2007-08-21 | 2009-02-25 | 佳世达科技股份有限公司 | Projector and method for cooling light source module discharging part |
| CN102763033A (en) * | 2010-02-25 | 2012-10-31 | 皇家飞利浦电子股份有限公司 | Method of cooling a lamp |
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| Publication number | Publication date |
|---|---|
| CN102314065B (en) | 2014-04-02 |
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Granted publication date: 20140402 |