WO2003083574A1 - Projection type image display unit - Google Patents
Projection type image display unit Download PDFInfo
- Publication number
- WO2003083574A1 WO2003083574A1 PCT/JP2003/003757 JP0303757W WO03083574A1 WO 2003083574 A1 WO2003083574 A1 WO 2003083574A1 JP 0303757 W JP0303757 W JP 0303757W WO 03083574 A1 WO03083574 A1 WO 03083574A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- projection
- display device
- air
- electrode
- image display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T23/00—Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere
-
- 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
-
- 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
- G03B21/22—Soundproof bodies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3144—Cooling systems
Definitions
- the present invention relates to a projection type video display device such as a liquid crystal projector.
- the projection type image display device Since the projection type image display device has a configuration in which the light emitted from the light source is modulated by a light valve such as a liquid crystal panel and projected, it is necessary to provide a high-intensity light source. It is necessary to take measures against the heat that is generated and the heat that is generated when light is absorbed by the polarizing plate of the liquid crystal panel or various optical components.In the past, a fan was rotated by a motor to intake and exhaust air. It was designed to be released outside the machine (see Japanese Patent Application Laid-Open No. 2001-222605).
- the present invention has been made in view of the above circumstances, and has as its object to provide a projection-type image display device that can substantially eliminate generation of sound during intake and exhaust.
- a projection-type image display device is a projection-type image display device that modulates light emitted from a light source by a light valve and projects the light. Ionize molecules in the air, A blower is provided for moving the ions generated by the other electrode by the other electrode to generate air movement. Also, in a projection type video display device in which light emitted from a light source is re-modulated by a light valve and projected, air ionized by corona discharge at one electrode is drawn by the other electrode to generate air movement. It is characterized by the provision of a blower that causes it to blow.
- the air blower electrically moves the ionized air to generate air movement.Therefore, unlike the air blown by the rotation of the fan, there is no generation of rotational noise, and there is almost no sound in the air intake and exhaust. It becomes possible.
- the ultraviolet light emitted from the light source is split and irradiated on the air blown by the blower. According to this, even if ozone is generated by the discharge, the ozone can be decomposed by the ultraviolet light. It is also possible a configuration in which a t one-side electrode so that can be effectively utilized in the ultraviolet is not necessary for the light in the video display to a plurality arranged in parallel, and arranged in parallel a plurality of the other-side electrode to correspond thereto, According to this, the transmission wind power can be improved. Further, a structure in which a plurality of one-side electrodes are arranged and a mesh-shaped electrode is arranged as the other-side electrode may be employed, and according to this, it is easy to realize low cost and light weight.
- the one-side electrode may be made of a metal plate having a plurality of sharpened portions at the edges, and according to this, assembling can be facilitated as compared with a configuration in which a large number of needle electrodes are arranged.
- a mesh electrode may be arranged as the other electrode.
- the one-side electrode having the plurality of sharp portions may be arranged so as to be separated from each other.
- the one-sided electrode having the plurality of sharp portions may be formed by etching a metal plate. According to this, the shape of the sharp portion can be optimized.
- the reflector portion of the light source may be provided with a notch, and the air sending portion of the blower may be located in the notch.
- blower may be located near the light source, so that heat from the light source is exhausted outside the device. Further, a configuration may be adopted in which the blower is disposed using substantially the entirety of one side surface of the device housing.
- FIG. 1 is a diagram showing a projection display apparatus of an embodiment of the present invention is an explanatory view showing a structure of an ion wind generator.
- FIG. 3 is an explanatory diagram showing another configuration and an arrangement form of the ion wind generator.
- FIG. 4 is a perspective view showing another configuration and an arrangement form of the ion wind generator.
- FIG. 5 is a perspective view showing another configuration of the ion wind generator.
- FIG. 6 is a perspective view showing another configuration and an arrangement form of the ion wind generator.
- FIG. 7 is a perspective view showing another configuration (electrode structure) of the ion wind generator.
- Figure 1 shows the optical system of a three-panel color liquid crystal projector.
- the light emitting portion 2 of the light source 1 is composed of an ultra-high pressure mercury lamp, a metal halide lamp, a xenon lamp, or the like, and the irradiation light is emitted as parallel light by the parabolic reflector 3, for example.
- the first dichroic mirror 4 is arranged at an angle of 45 ° with respect to the light emission direction of the light source 1, reflects ultraviolet light to the side, and transmits other wavelength components.
- the second dichroic mirror 5 transmits light in the red wavelength band and reflects light in the cyan (green + blue) wavelength band.
- the light in the red wavelength band transmitted through the second dichroic mirror 5 is reflected by the total reflection mirror 6 to change the optical path.
- the red light reflected by the total reflection mirror 6 passes through the condenser lens 7 and is transmitted through the transmission type liquid crystal light valve 31 for red light to be light-modulated.
- the light in the wavelength band of the shin reflected by the second dichroic mirror 5 is guided to the third dichroic mirror 8.
- the third dichroic mirror 8 transmits light in the blue wavelength band and reflects light in the green wavelength band.
- the light in the green wavelength band reflected by the third dichroic mirror 8 is guided to a transmissive liquid crystal light valve 32 for green light via a condenser lens 9 and transmitted therethrough, where the light is modulated.
- the light in the blue wavelength band transmitted through the third dichroic mirror 18 passes through the total reflection mirrors 11 and 13, the relay lenses 10 and 12, and the condenser lens 1, and passes through the transmission type for blue light.
- the liquid crystal light valve 33 is guided by the liquid crystal light valve 33 and transmitted therethrough to be light-modulated.
- the above-mentioned liquid crystal light valves 31, 32, and 33 are composed of a light-incident-side polarizing plate, a panel section in which liquid crystal is sealed between a pair of glass substrates (on which a pixel electrode and an alignment film are formed), And a side polarizing plate.
- the modulated light (image light of each color) modulated by passing through the liquid crystal light valves 31, 32, 33 is combined by the dichroic prism 15 to become color image light. This color image light is enlarged and projected by the projection lens 16 and is projected and displayed on a screen (not shown).
- An ion wind generator 20 is provided at a side position of the light source 1 c .
- the ion wind generator 20 has a corona at the needle electrode 21 on the minus side.
- the air is negatively ionized by the discharge, and the negatively ionized air is attracted by the cylindrical electrode 22 on the positive side to become empty. It is configured to cause air movement.
- the high voltage generation circuit 23 receives a voltage supply from the power supply unit 24, generates a high voltage of several volts to several tens of kV, and applies the high voltage to the electrodes 21 and 22.
- the air outlet of the ion wind generator 20 is directed to the light source 1, and the generated moving air (airflow) is directed to the light source 1, and the heat generated by the light source 1 is dissipated. Will be taken away.
- an ultraviolet focusing lens 18 and an ultraviolet reflecting mirror 17 are provided.
- the ultraviolet rays generated by the light source 1 by the ultraviolet focusing lens 18 and the ultraviolet reflecting mirror 17 are converged and guided to the vicinity of the air outlet of the ion wind generator 20.
- the air coming out of the air outlet contains ozone (O 3) generated by corona discharge, and this ozone is decomposed by the ultraviolet rays.
- Ultraviolet light is unnecessary light in image projection, and it is rather desirable to remove it from the illumination light.
- the ultraviolet rays are not simply removed, but are effectively used for ozone decomposition.
- the air outlet of the ion wind generator 20 is directed to the light source 1 and blows cooling air.
- the heat generated by the light source 1 by the ion wind generator 20 is reversed.
- the needle electrode 21 may be arranged near the light source 1 and the cylindrical electrode 22 may be arranged at a position farther from the light source 1 so that air is sucked.
- Fig. 3 shows the configuration and arrangement of the ion wind generator 20A.
- the ion wind generator 20A has a plurality of needle-shaped electrodes 21A ... arranged in parallel. Are arranged in parallel. In other words, this corresponds to the above-described ion wind generators 20 being assembled in parallel, but some of the electrodes 22 A ... also serve to form an adjacent cylinder. Become. In this way, the configuration in which a plurality of ion wind generators are grouped in parallel improves the wind power (air volume). Also, ion wind The direction of the air flow in the generator 20A is opposite to the direction in which the light source 1 is arranged, and the air outlet of the ion wind generator 20A is directed to the vent 19 of the device housing.
- FIG. 4 shows a configuration in which the ion wind generator 20 B is connected inside the reflector of the light source 1.
- a transparent cover 1a is provided on the light exit side to prevent glass from being scattered due to the rupture of the light-emitting part 2 of the light source 1.
- Notches 3a 3a are formed on both sides of the reflector 3 to prevent hot air from leaking out.
- the ion wind generator 20B includes a needle electrode 21B and a cylindrical electrode 22B, and the cylindrical electrode 22B is formed in a substantially semi-cylindrical shape, and has the shape of the notch 3a. Corresponding. Of the two notches 3a and 3a, only one notch 3a is provided with the ion wind generator 2OB, and the other notch 3a is an exhaust port.
- Ozone generated by the corona discharge of the ion wind generator 20 B is decomposed in the reflector 3 by the direct irradiation of the ultraviolet light from the light source 1. That is, in such a configuration, the first dichroic mirror 4 and the ultraviolet reflecting mirror 17 become unnecessary. It is desirable to attach a mesh member to the notch 3a in order to prevent the glass from scattering due to the rupture of the light emitting part 2.
- FIG. 5 shows the configuration of the ion wind generator 20C.
- This ion wind The generator 20C includes a needle electrode 21C and a mesh electrode 22C. With the configuration using this mesh electrode 22 C, it is easier to reduce the cost and weight as compared with the case where a large number of cylindrical electrodes are arranged.
- FIG. 6 is a perspective view showing the internal configuration of the projection display apparatus 40 provided with the ion wind generator 0D.
- the projection image display device 40 includes a white light source 41, an auxiliary fan 42, a power supply 43, a color wheel 44, an image generation optical system 45, a projection lens system 46, and a signal processing circuit 47.
- the ion wind generator 20D is arranged so as to occupy substantially the entire side surface of the housing close to the white light source 41.
- the ion wind generator 20D includes a plurality of needle electrodes 21D as one electrode, and the above-mentioned mesh electrode as the other electrode. In this way, the configuration in which a large number of needle-shaped electrodes 21 D...
- the ion wind generator 20D Occupy substantially the entire side surface of the housing improves the wind power (air volume).
- the direction of the air flow in the ion wind generator 20D is opposite to the direction of the arrangement of the white light source 41 (outside the machine).
- the moving air generated by the ion wind generator 20D is exhausted outside the housing. when it is, the ambient air heated to a high temperature is sucked by the light source 4 first heat, c also is exhausted outside the housing riding moving air, the ion wind generator 2 0 D is the ozone removal filter 2 3 D Ozone (O 3) generated by the discharge is decomposed and removed during exhaust.
- the ozone removal filter 23D for example, a filter obtained by using manganese dioxide as a catalyst and adhering it to a honeycomb-shaped support can be used.
- a plurality of needle-shaped electrodes 21 D are arranged, but in addition to such a structure, as shown in FIG. 7, a plurality of electrode plates 21 E having a plurality of sharp portions formed on an edge thereof are provided. They may be provided apart from each other. In such an electrode plate 21E, each sharpened portion functions as one needle electrode.
- the electrode plate 21E can be obtained by press molding (punching) on a metal plate, but in this embodiment, it is obtained by etching. Etching has the advantage that it is easier to optimize the shape of the sharpened part (reduction of discharge noise, improvement of ventilation efficiency, etc.).
- the configuration in which the ion wind generator is arranged in the vicinity of the light source 1 is shown.
- the configuration is not limited to this. Is also good.
- the positive and negative relations of the electrodes in the ion wind generator may be reversed, and if the movement of air is caused by the ionization of air or molecules in the air, the above-described specific example is used.
- An ion wind generator different from the configuration shown can be used.
- the image generation optical system using three transmission type liquid crystal display panels is shown.
- the present invention is not limited to such an image generation optical system. Can also be applied.
- the air blower is a mechanism for generating ion wind, unlike the air blow by the rotation of the fan, there is no generation of rotation noise, and almost no sound is generated at the time of intake and exhaust. It is possible to do. Further, in the configuration in which the ultraviolet light emitted from the light source is spectrally irradiated to the blowing air of the blowing device or the configuration including the ozone removal filter, even if ozone is generated, ozone is not discharged to the outside of the device. The effect is that it can be done.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03745424A EP1489458B1 (en) | 2002-03-28 | 2003-03-26 | Projection type image display unit |
| DE60333266T DE60333266D1 (de) | 2002-03-28 | 2003-03-26 | Bildanzeigeeinheit des projektionstyps |
| US10/509,114 US7210790B2 (en) | 2002-03-28 | 2003-03-26 | Projection type video display |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002091923 | 2002-03-28 | ||
| JP2002-91923 | 2002-03-28 | ||
| JP2002-361139 | 2002-12-12 | ||
| JP2002361139A JP3584031B2 (ja) | 2002-03-28 | 2002-12-12 | 投写型映像表示装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003083574A1 true WO2003083574A1 (en) | 2003-10-09 |
Family
ID=28677562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/003757 Ceased WO2003083574A1 (en) | 2002-03-28 | 2003-03-26 | Projection type image display unit |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7210790B2 (ja) |
| EP (1) | EP1489458B1 (ja) |
| JP (1) | JP3584031B2 (ja) |
| CN (1) | CN100437343C (ja) |
| DE (1) | DE60333266D1 (ja) |
| WO (1) | WO2003083574A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1571489A4 (en) * | 2002-12-12 | 2008-03-19 | Sanyo Electric Co | IMAGE DISPLAY UNIT OF PROJECTION TYPE |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4148865B2 (ja) * | 2003-09-26 | 2008-09-10 | 三洋電機株式会社 | 投写型映像表示装置 |
| JP4003791B2 (ja) | 2005-10-19 | 2007-11-07 | セイコーエプソン株式会社 | プロジェクタ |
| WO2007112763A1 (en) * | 2006-04-03 | 2007-10-11 | Aureola Swedish Engineering Ab | Method and apparatus for cooling and ventilation |
| JP4662185B2 (ja) * | 2008-05-15 | 2011-03-30 | カシオ計算機株式会社 | 光源装置及びプロジェクタ |
| JP5136266B2 (ja) * | 2008-07-30 | 2013-02-06 | セイコーエプソン株式会社 | 空間光変調装置、プロジェクタ、及び空間光変調装置の冷却方法 |
| KR101650715B1 (ko) * | 2008-12-15 | 2016-08-24 | 코닌클리케 필립스 엔.브이. | 조명기구를 위한 냉각 장치 |
| JP2011165490A (ja) * | 2010-02-10 | 2011-08-25 | Seiko Epson Corp | 光源装置およびプロジェクター |
| JP2011003380A (ja) * | 2009-06-18 | 2011-01-06 | Seiko Epson Corp | 光源装置およびプロジェクター |
| JP2011003379A (ja) * | 2009-06-18 | 2011-01-06 | Seiko Epson Corp | 光源装置およびプロジェクター |
| US20110094710A1 (en) * | 2009-10-23 | 2011-04-28 | Ventiva, Inc. | Redundant emitter electrodes in an ion wind fan |
| TWI447513B (zh) * | 2011-08-03 | 2014-08-01 | Hon Hai Prec Ind Co Ltd | 投影機光源裝置 |
| CN103698966B (zh) * | 2012-09-27 | 2016-08-17 | 中强光电股份有限公司 | 照明系统及投影装置 |
| CN115311967B (zh) * | 2022-02-17 | 2023-04-25 | 郑州航空工业管理学院 | 一种可循环展示广告的户外广告柜 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4812711A (en) | 1985-06-06 | 1989-03-14 | Astra-Vent Ab | Corona discharge air transporting arrangement |
| US5012159A (en) | 1987-07-03 | 1991-04-30 | Astra Vent Ab | Arrangement for transporting air |
| US5180404A (en) | 1988-12-08 | 1993-01-19 | Astra-Vent Ab | Corona discharge arrangements for the removal of harmful substances generated by the corona discharge |
| WO1994012282A1 (en) | 1992-11-25 | 1994-06-09 | Spectrex Inc. | Cooling method and apparatus |
| JPH08238441A (ja) * | 1995-03-03 | 1996-09-17 | Kansei Corp | 空気清浄器 |
| JPH10241556A (ja) * | 1997-02-24 | 1998-09-11 | Furukawa Electric Co Ltd:The | プラズマディスプレイの冷却装置 |
| JP2001330890A (ja) * | 2000-05-22 | 2001-11-30 | Matsushita Electric Ind Co Ltd | 光源装置及び投写型表示装置 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2037146U (zh) * | 1988-09-01 | 1989-05-10 | 电子工业部第十二研究所自动工程研究所 | 水果蔬菜电子保鲜机 |
| CN2052615U (zh) * | 1989-05-18 | 1990-02-14 | 贺学成 | 微功耗多功能果蔬保鲜器 |
| JP2000171920A (ja) | 1998-12-09 | 2000-06-23 | Noritsu Koki Co Ltd | 光源装置 |
| JP2001222065A (ja) | 2000-02-07 | 2001-08-17 | Sanyo Electric Co Ltd | 冷却ファンを備えた電子機器 |
| JP2003195420A (ja) * | 2001-12-27 | 2003-07-09 | Tamron Co Ltd | プロジェクター用冷却装置 |
| JP3717885B2 (ja) * | 2002-12-12 | 2005-11-16 | 三洋電機株式会社 | 投写型映像表示装置 |
| JP2005275200A (ja) * | 2004-03-26 | 2005-10-06 | Sanyo Electric Co Ltd | 投写型映像表示装置 |
| TWI240143B (en) * | 2004-09-17 | 2005-09-21 | Coretronic Corp | Projector with air cleaning functionality |
-
2002
- 2002-12-12 JP JP2002361139A patent/JP3584031B2/ja not_active Expired - Fee Related
-
2003
- 2003-03-26 CN CNB038067846A patent/CN100437343C/zh not_active Expired - Fee Related
- 2003-03-26 EP EP03745424A patent/EP1489458B1/en not_active Expired - Lifetime
- 2003-03-26 WO PCT/JP2003/003757 patent/WO2003083574A1/ja not_active Ceased
- 2003-03-26 DE DE60333266T patent/DE60333266D1/de not_active Expired - Lifetime
- 2003-03-26 US US10/509,114 patent/US7210790B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4812711A (en) | 1985-06-06 | 1989-03-14 | Astra-Vent Ab | Corona discharge air transporting arrangement |
| US5012159A (en) | 1987-07-03 | 1991-04-30 | Astra Vent Ab | Arrangement for transporting air |
| US5180404A (en) | 1988-12-08 | 1993-01-19 | Astra-Vent Ab | Corona discharge arrangements for the removal of harmful substances generated by the corona discharge |
| WO1994012282A1 (en) | 1992-11-25 | 1994-06-09 | Spectrex Inc. | Cooling method and apparatus |
| JPH08238441A (ja) * | 1995-03-03 | 1996-09-17 | Kansei Corp | 空気清浄器 |
| JPH10241556A (ja) * | 1997-02-24 | 1998-09-11 | Furukawa Electric Co Ltd:The | プラズマディスプレイの冷却装置 |
| JP2001330890A (ja) * | 2000-05-22 | 2001-11-30 | Matsushita Electric Ind Co Ltd | 光源装置及び投写型表示装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1489458A4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1571489A4 (en) * | 2002-12-12 | 2008-03-19 | Sanyo Electric Co | IMAGE DISPLAY UNIT OF PROJECTION TYPE |
| US7407293B2 (en) | 2002-12-12 | 2008-08-05 | Sanyo Electric Co., Ltd. | Projection type image display unit |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1489458B1 (en) | 2010-07-07 |
| US7210790B2 (en) | 2007-05-01 |
| EP1489458A4 (en) | 2008-03-19 |
| CN100437343C (zh) | 2008-11-26 |
| DE60333266D1 (de) | 2010-08-19 |
| EP1489458A1 (en) | 2004-12-22 |
| US20050237500A1 (en) | 2005-10-27 |
| JP2004004505A (ja) | 2004-01-08 |
| JP3584031B2 (ja) | 2004-11-04 |
| CN1643448A (zh) | 2005-07-20 |
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