CN100371824C - Cooling control method for projection display unit - Google Patents
Cooling control method for projection display unit Download PDFInfo
- Publication number
- CN100371824C CN100371824C CNB2004100386624A CN200410038662A CN100371824C CN 100371824 C CN100371824 C CN 100371824C CN B2004100386624 A CNB2004100386624 A CN B2004100386624A CN 200410038662 A CN200410038662 A CN 200410038662A CN 100371824 C CN100371824 C CN 100371824C
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- Prior art keywords
- projection display
- display equipment
- control
- fan
- gravity
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- 238000001816 cooling Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005484 gravity Effects 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000725 suspension Substances 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The present invention relates to a cooling control method of a projection display unit. A placement state of the projection display unit is detected by a gravity exploration component, and whether the projection display unit is in a table type normal state or an inversion suspension state of a ceiling board or a side suspension state of a wall is detected. A detection signal is transferred to a control unit so that a fan is controlled to output a first cooling mode or a second cooling mode or a third cooling mode. Because heat field distribution in the projection display unit is changed due to different operating states, proper air flow is output so that an effect on cooling the integral projection display unit is achieved, and an application range and the elasticity of the projection display unit are increased; moreover, the service life of each component of the projection display unit is extended.
Description
Technical field
The invention relates to a kind of projection display equipment, especially about a kind of control method that is used to cool off projection display equipment.
Background technology
General projection display equipment can be provided with on the table according to the difference of user's demand, wall or be suspended to ceiling, but different use-pattern, its thermal field distributes and also changes thereupon.Please refer to Fig. 1, for existing desktop projection display equipment 10, mainly is to provide power supply by power-supply unit 11, makes power light source 12 projection illumination light beams, forms the light beam with image through optical system 13, through camera lens 14 projection imagings.Wherein power-supply unit 11 and power light source 12 are main thermal source, and because hot-air has the trend of rising, the distribution of projection display equipment 10 thermal fields, with the upper portion position than lower portion temperature height, in order to increase the radiating efficiency of fan 15, fan 15 is arranged at than leaning on the thermal field upside, just close 12 tops, optical system 13 polarisation sources are to make things convenient for heat extraction, make the optical element and the electronic component of projection display equipment 10 keep optimum Working, and the damage that keeps from heat.
Continuation is with reference to Fig. 2, when projection display equipment 10 is swung to when being suspended to ceiling 17 via suspension bracket 16, because the hot-air ascendant trend distributes thermal field and changes, but fan 15 coolant flow fields are fixing, can't will cause projection display equipment 10 projection quality to descend with the change of thermal field with the whole projection display equipment 10 of suitable cooling.
Summary of the invention
The object of the present invention is to provide a kind of cooling control method of projection display equipment,, detect the placement state of projection display equipment automatically, export corresponding flow field, reach best cooling effect with the control fan through a gravity detection element.
Another object of the present invention is to provide a kind of cooling control method of projection display equipment, multiple refrigerating mode can be provided, to increase the use elasticity of projection display equipment.
For reaching above-mentioned purpose, the present invention is the placement state with gravity detection element testing projection display equipment, detecting projection display equipment is the normal condition of desktop, or ceiling swing to suspended state, or the side of wall is hung state, transmit detection signal to control module, the control fan is exported first refrigerating mode, or second refrigerating mode, or the 3rd refrigerating mode, change because of the mode of operation difference according to thermal field distribution in the projection display equipment, the air quantity that output is suitable, to reach the effect of the whole projection display equipment of cooling, increase the scope of application and the elasticity of projection display equipment, and then prolong the serviceable life of each element of projection display equipment.
Description of drawings
Fig. 1 is for showing the synoptic diagram of existing desktop projection display equipment.
Fig. 2 is for showing the side view of existing hanging type projection display equipment.
Fig. 3 is for showing the synoptic diagram of projection display equipment of the present invention.
Fig. 4 is for showing the gravity detection element work synoptic diagram of projection display equipment of the present invention.
Fig. 5 (a) to (c) is for showing the work synoptic diagram of gravity detection element under different control models of projection display equipment of the present invention.
Fig. 6 is the process flow diagram of the cooling control method of demonstration projection display equipment of the present invention.
Main description of reference numerals
20 projection display equipments, 251 gravity rods (rodhaving weight)
21 power-supply units, 252 first connection end points
22 light sources, 253 second connection end points
23 optical systems 254 the 3rd connection end point
24 camera lenses, 26 control modules
25 gravity detection elements, 261 first refrigerating modes
250 end points (end), 262 second refrigerating modes
263 the 3rd refrigerating modes, 28 foot rest faces
27 fans
Embodiment
Relevant the present invention is for reaching above-mentioned purpose, and technological means that is adopted and complementary work thereof are imitated, and lift preferred embodiment here, and conjunction with figs. are illustrated as follows.
Please refer to Fig. 3, the projection display equipment 20 of the embodiment of the invention mainly comprises power-supply unit 21, light source 22, optical system 23, camera lens 24, gravity detection element 25, control module 26 and fan 27 etc.Wherein power-supply unit 21 provides power supply, makes light source 22 produce illuminating bundles, through optical system 23 illuminating bundle is modulated to image beam, through camera lens 24 projects images.In addition, through in projection display equipment, establishing gravity detection element 25 in addition, as gravity switch or gravity mechanism etc., in order to detect the placement state of projection display equipment 20, and detection signal is reached control module 26, and control module 26 can be according to the detection signal of gravity detection element 25, the corresponding refrigerating mode of control fan 27 outputs, and when normally putting, make fan 27 its inner higher temperatures positions of deflection cooling according to projection display equipment 20.
Continuation is with reference to Fig. 4, this gravity detection element 25 has a gravity rod 251, one end of gravity rod 251 is articulated in (pivot) end points 250 and can rotates freely, with end points 250 is the center of circle, gravity rod 251 length are radius, directly over end points 250, under and same level one side establish three connection end points, first connection end point 252 is positioned under the end points 250, and be connected in the control loop of fan 27 first refrigerating modes 261, second connection end point 253 is positioned at directly over the end points 250, and be connected in the control loop of fan 27 second refrigerating modes 262, the 3rd connection end point 254 is positioned at end points 250 same levels one side, and is connected in the control loop of fan 27 the 3rd refrigerating mode 263.
Shown in Fig. 5 (a), when projection display equipment of the present invention 20 is put with normal condition, just foot rest face 28 down, gravity rod 251 is let droop by gravity, produces with first connection end point 252 and contacts (touch), with the signal of projection display equipment 20 with normal placement state, control loop through first refrigerating mode 261 reaches control module 26, make control module 26 output control signals, control fan 27 is with first rotational speed, above the cooling projection display equipment 20 inner higher temperatures.Shown in Fig. 5 (b), when projection display equipment 20 of the present invention is loaded on foot rest face 28 because of stationary installation, in order to avoid it is attractive in appearance to destroy projection display equipment 20, and need swing to suspended state, just foot rest face 28 up, gravity rod 251 is let droop by gravity, contact with 253 generations of second connection end point, signal with projection display equipment 20 suspended states, control loop through second refrigerating mode 262 reaches control module 26, make control module 26 output control signals, control fan 27 is with second rotational speed, this second rotating speed makes deflection fan 27 provide big air quantity to enlarge cooling surface much larger than first rotating speed, with cooling projection display equipment 20 inner high temperature positions near foot rest face 28.Shown in Fig. 5 (C), when projection display equipment 20 of the present invention needs side to be hung on the wall state, just foot rest face 28 is when a wall ancient piece of jade, round, flat and with a hole in its centre, gravity rod 251 is let droop by gravity, contact with 254 generations of the 3rd connection end point, projection display equipment 20 sides are hung the signal of state, control loop through the 3rd refrigerating mode 263 reaches control module 26, make control module 26 output control signals, control fan 27 is with the 3rd rotational speed, the 3rd rotating speed is greater than second rotating speed, makes deflection fan 27 that bigger air quantity is provided, and is inner near camera lens 28 high temperature position far away with cooling projection display equipment 20.
Therefore, the cooling control method of projection display equipment of the present invention, as shown in Figure 6, it is the placement state that detects projection display equipment 20 with gravity detection element 25, detecting projection display equipment is the normal condition of desktop, or ceiling swing to suspended state, or the side of wall is hung state, transmit detection signal to control module 26, control fan 27 outputs first refrigerating mode 261, or second refrigerating mode 262, or the 3rd refrigerating mode 263, change according to the placement state difference of thermal field distribution in the projection display equipment 20 because of projection display equipment 20, the air quantity that output is suitable, to reach the effect of the whole projection display equipment of cooling, increase the scope of application and the elasticity of projection display equipment, and then prolong the serviceable life of each element of projection display equipment.
Above-described, only be that scope of the present invention is not limited to these preferred embodiments, and is all according to any change that the present invention did, and not breaking away under the spirit of the present invention, all belongs to the scope of protection of present invention in order to convenient explanation preferred embodiment of the present invention.
Claims (7)
1. the cooling control method of a projection display equipment, this projection display equipment is provided with the gravity detection element, is connected to fan through control module, and its step comprises:
(1) with the placement state of gravity detection element testing projection display equipment;
(2) the gravity detection element transmits detection signal to control module; And
(3) the corresponding refrigerating mode of control module control fan output.
2. the cooling control method of projection display equipment according to claim 1, wherein when this projection display equipment placement state was desktop, control module control fan was exported first refrigerating mode.
3. the cooling control method of projection display equipment according to claim 1, wherein when this projection display equipment placement state be side when hanging state, control module control fan is exported the 3rd refrigerating mode.
4. the cooling control method of projection display equipment according to claim 1, wherein when this projection display equipment placement state was suspended state, control module control fan was exported second refrigerating mode.
5. the cooling control method of projection display equipment according to claim 1, wherein this gravity detection element is a gravity switch.
6. the cooling control method of projection display equipment according to claim 5, wherein this gravity detection element is a gravity mechanism.
7. according to the cooling control method of each described projection display equipment among the claim 1-6, wherein this gravity detection element has a gravity rod and first to the 3rd connection end point, first connection end point is connected in the control loop of fan first refrigerating mode, second connection end point is connected in the control loop of fan second refrigerating mode, the 3rd connection end point is connected in the control loop of fan the 3rd refrigerating mode
When this projection display equipment placement state is desktop, this gravity rod produces with first connection end point and contacts, with the signal of this projection display equipment with normal placement state, control loop through first refrigerating mode reaches this control module, make this control module output control signal, the control fan is with first rotational speed
When this projection display equipment placement state is suspended state, this gravity rod produces with second connection end point and contacts, signal with this projection display equipment suspended state, control loop through second refrigerating mode reaches this control module, make this control module output control signal, the control fan is with second rotational speed, and this second rotating speed is much larger than first rotating speed
When this projection display equipment placement state is side extension state, this gravity rod produces with the 3rd connection end point and contacts, this projection display equipment side is hung the signal of state, control loop through the 3rd refrigerating mode reaches this control module, make this control module output control signal, the control fan is with the 3rd rotational speed, and the 3rd rotating speed is greater than second rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100386624A CN100371824C (en) | 2004-04-27 | 2004-04-27 | Cooling control method for projection display unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100386624A CN100371824C (en) | 2004-04-27 | 2004-04-27 | Cooling control method for projection display unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1690840A CN1690840A (en) | 2005-11-02 |
| CN100371824C true CN100371824C (en) | 2008-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100386624A Expired - Lifetime CN100371824C (en) | 2004-04-27 | 2004-04-27 | Cooling control method for projection display unit |
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| Country | Link |
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| CN (1) | CN100371824C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929616B (en) * | 2009-06-25 | 2013-03-27 | 扬光绿能股份有限公司 | Illumination system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676573B (en) * | 2016-03-29 | 2018-05-18 | 海信集团有限公司 | A kind of laser projection device and heat dissipating method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0822075A (en) * | 1994-07-08 | 1996-01-23 | Fujitsu Ltd | Optical device and cooling method thereof |
| JP2003015224A (en) * | 2001-06-28 | 2003-01-15 | Toshiba Corp | Projection display device |
| JP2004029485A (en) * | 2002-06-27 | 2004-01-29 | Toshiba Corp | Projection type display device and method of cooling the same |
-
2004
- 2004-04-27 CN CNB2004100386624A patent/CN100371824C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0822075A (en) * | 1994-07-08 | 1996-01-23 | Fujitsu Ltd | Optical device and cooling method thereof |
| JP2003015224A (en) * | 2001-06-28 | 2003-01-15 | Toshiba Corp | Projection display device |
| JP2004029485A (en) * | 2002-06-27 | 2004-01-29 | Toshiba Corp | Projection type display device and method of cooling the same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929616B (en) * | 2009-06-25 | 2013-03-27 | 扬光绿能股份有限公司 | Illumination system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1690840A (en) | 2005-11-02 |
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Granted publication date: 20080227 |