CN208297914U - Projection display device - Google Patents
Projection display device Download PDFInfo
- Publication number
- CN208297914U CN208297914U CN201690001273.0U CN201690001273U CN208297914U CN 208297914 U CN208297914 U CN 208297914U CN 201690001273 U CN201690001273 U CN 201690001273U CN 208297914 U CN208297914 U CN 208297914U
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- China
- Prior art keywords
- display device
- projection display
- shell
- light source
- forcing
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
Abstract
Projection display device includes multiple optical components (11,12,14~19)；Shell (13) accommodates multiple optical components (11,12,14~19)；Radiating component (20,21) is set to the outside of shell (13), at least one optical component (11,12) of hot-melt adhesive paste in multiple optical components；And positive pressure generation device (30), so that the inner space (13a) of shell (13) is generated positive pressure.
Description
Technical field
The present invention relates to projection display devices.
Background technique
In projection display device (projector), in order to maintain performance, the reliability of projector for a long time, it is necessary to make
The temperature of light source, optical component, electronic component etc. is suppressed to allowable temperature or less with cooling way.As cooling way,
It is widely used such as under type: air is introduced from the external forced of shell using cooling fan, by the outside air come straight
Connect cooling light source, optical component etc..
In such type of cooling, when being introduced from outside into air, the dust such as dust are introduced in outer together with air
In shell, which is possible to be attached to light source, optical component.In this case, the spot due to caused by the accumulation of dust, projection
The performance of instrument is likely to decrease.Further, spot absorbs the temperature rising of light and optical component, it is also possible to lead to optical section
The breakage of part.
In this regard, proposing such as under type in patent document 1: making the shell for containing the airtight construction of light source, optical component
Interior air is recycled by convection current, by the convection circulation, cools down light source, optical component indirectly.In the cooling side
In formula, a part of the air recycled inside the shell is disposed through the blow vent of shell and is handed over outside air
It changes, but by the way that filter is set to the blow vent, dust is inhibited to invade in shell.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2005-352446 bulletin
Summary of the invention
Problems to be solved by the invention
In the mode documented by patent document 1, enough cooling effects are obtained in order to make air carry out convection circulation,
Need to increase the internal capacity of shell, it is especially in the case where calorific value is big and impracticable.In addition, can not also be gone with filter
The small dust removed is possible to invade in shell from blow vent, if the dust is accumulated due to prolonged use,
Its influence can not be ignored.
Therefore, the projection display device excellent the object of the present invention is to provide a kind of cooling performance and anti-dust performance.
A technical solution to solve project
In order to achieve the above object, projection display device of the invention includes multiple optical components；Shell accommodates more
A optical component；Radiating component is set to the outside of shell, at least one of hot-melt adhesive paste in multiple optical components；And just
Generation device is pressed, the inner space of shell is made to generate positive pressure.
Invention effect
More than, in accordance with the invention it is possible to provide a kind of cooling performance and the excellent projection display device of anti-dust performance.
Detailed description of the invention
Fig. 1 is the approximate vertical view for showing the structure of projection display device of an embodiment of the invention.
Fig. 2 is the approximate vertical view for showing a structural example of light source unit of an embodiment of the invention.
Fig. 3 is the approximate vertical view for showing the other structures example of the light source unit of an embodiment of the invention.
Specific embodiment
In the following, illustrating embodiments of the present invention referring to attached drawing.
Fig. 1 is the approximate vertical view for showing the structure of projection display device of an embodiment of the invention.
Referring to Fig.1, projection display device (projector) 1 has light source unit 10, optical engine unit 2 and projecting lens
3.Light source unit 10 is will be including units such as optical component, the electronic components of light sources such as lamp, semiconductor laser, light emitting diode
Made of change.About the details of light source unit 10, will be described later.Optical engine unit 2 has display element, will come from light
The illumination of source unit 10 is mapped to the optical component etc. of display element.Display element is for example by liquid crystal display (LCD) panel, number
Micro-mirror device (DMD) is constituted, and has the function being modulated according to picture signal to the light injected.Projecting lens 3 has
The light projected from optical engine unit 2 is projected into screen etc. and is shown as the function of image.
In addition, projector 1 has the external introducing air from shell 4 and cools down light source unit 10 by the outside air
Aftermentioned radiator cooling fan 5,6 and the scavenger fan 7 that is discharged to the outside the heat in shell 4.
Fig. 2 is the approximate vertical view for showing a structural example of light source unit for present embodiment.In the following, about this implementation
The light source unit of mode is illustrated in case where using semiconductor laser as light source, but the type of light source is not
It is defined in this, is able to use the various light sources such as lamp, light emitting diode (LED).
Light source unit 10 has the semiconductor laser 11 for projecting laser (blue light), projects fluorescence by laser pumping
The fluorophor 12 of (sodium yellow) and the closed shell 13 that semiconductor laser 11 and the receiving of fluorophor 12 are arrived to inside.Closed
The inside of shell 13 also contains other optical components such as collector lens 14~17, diffuser plate 18, dichronic mirror 19.In addition, light source
Unit 10 has the radiator (radiating component) 20,21 in the outside for being set to closed shell 13.One 20 hot-melt adhesive paste of radiator
In semiconductor laser 11, another 21 hot-melt adhesive paste of radiator is in fluorophor 12.Radiator 20,21 has semiconductor laser
The heat of device 11 and fluorophor 12 sheds to the outside of closed shell 13, and that their temperature is suppressed to allowable temperature is below
Function.
Closed shell 13 is for example made of housing body and case lid, cushion is arranged, by copper in their bonding part
Deng the filler of the compositions such as soft metal or rubber, to have closed inner space 13a.Closed 13 energy of shell as a result,
The dust such as dust and air (for example, the cooling wind generated by cooling fan 4,5) are enough inhibited to invade inner space 13a together simultaneously
It is attached to light source, each optical component.Inhibit from the light that semiconductor laser 11 projects not in addition, closed shell 13 also has
The light that image for projector is shown leaks into external function.In addition, being provided in closed shell 13 makes as light source list
Window (lens) 13b of the emergent light of member 10 and the fluorescence transmission from the injection of fluorophor 12.Window 13b can be not necessarily lens,
It can be other optical components such as diffuser plate, change beam splitter.
The inner space 13a of closed shell 13 is preferably closed in a manner of it can completely cut through the circulation of air and surrounding,
But such complete confined space be in reality it is impossible, cannot exclude what small dust was invaded from small gap
Possibility.Even such small dust, if be piled up in due to prolonged use in closed shell 13, shadow
Sound can not also be ignored.Therefore, it is invaded in closed shell 13 to be adequately suppressed dust, it is only empty by above-mentioned closed inside
Between 13a be inadequate.
Therefore, the light source unit 10 of present embodiment has and is pressurizeed and made to the inner space 13a of closed shell 13
The positive pressure that inner space 13a generates positive pressure generates unit (positive pressure generation device) 30.That is, in the present embodiment, it is close by making
The projecting pressure (atmospheric pressure) of pressure in closed shell body 13, is also able to suppress small dust from the micro- of closed shell 13
Small gap invades inner space 13a.As a result, being able to suppress the spot due to caused by the accumulation of dust and causing for example
Brightness, light transmission reduce the reduced performance to projector, or being generated heat due to absorption light causes each optical component damaged.
In addition, such structure of present embodiment is especially effective in the case where using semiconductor laser 11 as light source.This
It is since in semiconductor laser 11, the optical density of laser is high, light dust effect is big, thus since dust is attached to optics
Influence caused by component is big.
In addition, in the present embodiment, in light source unit 10, by laser beam transformation at fluorescence, and by the fluorescence through close
The window 13b of closed shell body 13 is projected.It is penetrated at this point, the optical density of the fluorescence projected from light source unit 10 is lower than from semiconductor laser 11
The optical density of laser out.Therefore, in the present embodiment, do not cause dust attached due to the light that projects from light source unit 10
In the risk of optical component.
Positive pressure, which generates unit 30, has force (forcing) pump 31.The primary side (spraying side) of force (forcing) pump 31 is connected to closed via pipe 32
Shell 13, can be by Pressurized air supply to the inner space 13a of closed shell 13.In addition, it is for cold that force (forcing) pump 31, which is not,
But purpose and use, so, do not need that the forced air from force (forcing) pump 31 is made to blow to light source, each optical component.Though
A possibility that being attached to light source, each optical component for the dust for excluding to include in air as much as possible, preferably do not make from plus
The forced air of press pump 31 blows to these light sources, each optical component.
The positive pressure of inner space 13a is maintained at the pressure for being able to suppress the degree of intrusion of dust by force (forcing) pump 31,
It is not necessarily required to be acted always.Though force (forcing) pump 31 is preferably intermittently acted according to service life extended viewpoint,
That is, it is preferred that repeating to act at certain intervals and stop.By acting force (forcing) pump 31 intermittently, it is able to extend
The service life of force (forcing) pump 31, can be avoided along with the service life of projector extend and the first end-of-life of force (forcing) pump 31 as bad feelings
Condition.The intermitten of force (forcing) pump 31 can be when projector 1 starts, after being acted within a certain period of time, every set
The fixed time acts certain time.Alternatively, can also be in the inner space 13a by the closed shell 13 of determination of pressure sensor
Pressure, the measured value be lower than specified value in the case where, act force (forcing) pump 31.As force (forcing) pump 31, due to static pressure
Performance is high, so, it is suitble to the pump using the partition mode driven by DC motor.
Further, positive pressure generates the height that unit 30 has the primary side (suction side) that force (forcing) pump 31 is connected to via pipe 33
The membrane filter 34 of density.Membrane filter 32 cannot be arranged for presser units such as fans, but in the present embodiment,
By using the high force (forcing) pump 31 of static pressure performance, so as to be arranged.Closed shell 13 is supplied to as a result, can remove
The dust for including in forced air can further increase anti-dust performance.
Fig. 3 is the approximate vertical view for showing the other structures example of the light source unit of present embodiment.
Semiconductor laser in structural example shown in Fig. 3, with the laser for projecting the excitation light as excitation fluorophor 12
Device 11 is provided independently from the semiconductor laser 41 for projecting the laser as blue light from light source unit 10.Along with this
Ground, also additional setting collector lens 42,43 and diffuser plate 44.That is, not only shooting out the glimmering of autofluorescence body 12 from light source unit 10
Light also projects the laser for projecting from semiconductor laser 41 and being spread by diffuser plate 44.Further, in the outer of closed shell 13
Side, be provided with hot-melt adhesive paste to additional semiconductor laser 41 radiator 22.About the structure other than this, and shown in Fig. 2
Structural example it is identical.
In addition, as described above, spreading laser in light source unit 10, this is through spreading in structural example shown in Fig. 3
The closed shell 13 of laser light window 13b and project.At this point, the optical density of the laser through spreading projected from light source unit 10
Lower than the optical density of the laser projected from semiconductor laser 11,44.Therefore, in structural example shown in Fig. 3, also not due to
Dust is caused to be attached to the risk of optical component from the light that light source unit 10 projects.
In the above-described embodiment, the dust tight construction that unit is constituted is generated about by closed shell and positive pressure, to be applied to
It is illustrated in case where light source unit, but the present invention is not limited thereto, additionally it is possible to be applied to other optical unit (examples
Such as, optical engine unit).
More than, the present invention is illustrated referring to embodiment, but the present invention is not limited to above embodiment.For the present invention
Structure, detailed content, can carry out within the scope of the invention skilled artisans appreciate that various changes.
Label declaration
1 projection display device
2 optical engine units
3 projecting lens
4 shells
5,6 cooling fan
7 scavenger fans
10 light source units
11,41 semiconductor laser
12 fluorophor
13 closed shells
The inner space 13a
13b window
14~17,42,43 collector lenses
18,44 diffuser plate
19 dichronic mirrors
20~22 radiators
30 positive pressures generate unit
31 force (forcing) pumps
32,33 pipe
34 membrane filters
Claims (11)
1. a kind of projection display device comprising:
Multiple optical components；
Shell accommodates the multiple optical component；
Radiating component is set to the outside of the shell, at least one of hot-melt adhesive paste in the multiple optical component；And
Positive pressure generation device makes the inner space of the shell generate positive pressure.
2. projection display device according to claim 1, which is characterized in that
The multiple optical component includes fluorophor and projects the light source for motivating the excitation light of the fluorophor, and the shell has
The window for penetrating the fluorescence projected from the fluorophor.
3. projection display device according to claim 1, which is characterized in that
The multiple optical component include project laser light source and for the laser inject diffuser plate, the shell have make
The window of the laser light projected from the diffuser plate.
4. projection display device according to claim 2, which is characterized in that
The projection display device also includes display element, is modulated to the light for having penetrated the window；And projection is saturating
Mirror projects the light projected from the display element.
5. projection display device according to claim 2, which is characterized in that
The window is lens.
6. projection display device according to claim 2, which is characterized in that
The optical density of the light projected from the window is lower than the optical density of the light projected from the light source.
7. projection display device according to claim 1, which is characterized in that
The positive pressure generation device has intermittently to the force (forcing) pump of inner space supply forced air.
8. projection display device according to claim 7, which is characterized in that
The force (forcing) pump is intermittently acted according to the pressure in the inner space.
9. projection display device according to claim 8, which is characterized in that
Pressure of the force (forcing) pump in the inner space is acted in the case where being lower than specified value.
10. projection display device according to claim 7, which is characterized in that
The positive pressure generation device has the membrane filter for the primary side for being set to the force (forcing) pump.
11. projection display device according to claim 1, which is characterized in that
The projection display device has the cooling fan of the cooling radiating component.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/058308 WO2017158756A1 (en) | 2016-03-16 | 2016-03-16 | Projection display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208297914U true CN208297914U (en) | 2018-12-28 |
Family
ID=59852010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201690001273.0U Active CN208297914U (en) | 2016-03-16 | 2016-03-16 | Projection display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN208297914U (en) |
| WO (1) | WO2017158756A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0727680Y2 (en) * | 1987-03-31 | 1995-06-21 | 日新電機株式会社 | Dustproof device for electrical equipment |
| JP2001010166A (en) * | 1999-06-25 | 2001-01-16 | Fuji Photo Film Co Ltd | Image recording device |
| JP2001242434A (en) * | 2000-03-01 | 2001-09-07 | Sanyo Electric Co Ltd | Liquid crystal projector |
| JP4462904B2 (en) * | 2003-11-19 | 2010-05-12 | Ｎｅｃディスプレイソリューションズ株式会社 | COOLING MECHANISM, ELECTRONIC DEVICE, PROJECTOR, AND COOLING METHOD IN CASE |
| JP2006195368A (en) * | 2005-01-17 | 2006-07-27 | Sony Corp | Display device and cooling method |
| JP5700494B2 (en) * | 2010-02-04 | 2015-04-15 | 三菱電機株式会社 | Projection device |
| JP5685692B2 (en) * | 2011-05-25 | 2015-03-18 | 日立マクセル株式会社 | Projection-type LCD device |
| JP2015094860A (en) * | 2013-11-12 | 2015-05-18 | 株式会社リコー | Illumination light source device and image projection device |
| JP5804130B2 (en) * | 2014-04-16 | 2015-11-04 | セイコーエプソン株式会社 | Light source device and projector |
-
2016
- 2016-03-16 CN CN201690001273.0U patent/CN208297914U/en active Active
- 2016-03-16 WO PCT/JP2016/058308 patent/WO2017158756A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017158756A1 (en) | 2017-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Tokyo, Japan Patentee after: Sharp NEC display solutions Co.,Ltd. Address before: Tokyo, Japan Patentee before: NEC DISPLAY SOLUTIONS, Ltd. |