WO2005024509A1 - 投写型表示装置 - Google Patents
投写型表示装置 Download PDFInfo
- Publication number
- WO2005024509A1 WO2005024509A1 PCT/JP2004/012225 JP2004012225W WO2005024509A1 WO 2005024509 A1 WO2005024509 A1 WO 2005024509A1 JP 2004012225 W JP2004012225 W JP 2004012225W WO 2005024509 A1 WO2005024509 A1 WO 2005024509A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- ray tube
- cathode ray
- display device
- tray
- Prior art date
Links
Classifications
-
- 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
-
- 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
- G03B21/10—Projectors with built-in or built-on screen
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
- H04N5/7408—Direct viewing projectors, e.g. an image displayed on a video CRT or LCD display being projected on a screen
-
- 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]
Definitions
- the present invention relates to a projection display device using a liquid-cooled cathode-ray tube device provided with a liquid-cooling means for cooling a front panel of a cathode-ray tube.
- a projection display device using a liquid-cooled cathode-ray tube device equipped with a liquid-cooling means for cooling a front panel of a cathode-ray tube for obtaining a large-sized image screen.
- a projection type display device for example, as shown in the schematic diagram of FIG. 9, a screen and a liquid-cooled cathode ray tube device for projection are integrated in one cabinet to be a collective type.
- reference numeral 1 denotes a projection display.
- a reflection mirror 3 is provided at a position facing the reflection mirror 3, and a liquid-cooled cathode ray tube device 2 as a projection tube is provided so as to face the surface of the reflection mirror 3.
- the projection light 6 projected from the liquid-cooled cathode ray tube device 2 is reflected by the reflection mirror 13, enters the screen 4, and projects a predetermined image on the screen 4. You can see a large projection screen from the front of screen 4.
- Patent Literature 1 discloses an example of a liquid-cooled cathode ray tube device 2 used for such a projection display device.
- the liquid-cooled cathode ray tube device for projection disclosed in Patent Document 1 has a liquid cooling means mounted on the front surface of the cathode ray tube, a coolant is sealed in the liquid cooling means, and the liquid cooling means is provided in the liquid cooling means.
- the velocity control valve for the cooling fluid provided is made of a composite material of two types of synthetic rubber, so that the velocity In this case, measures are taken to reduce the amount of coolant from the system and to prevent liquid leakage due to cracks generated by the stress of the bending stress applied to the bellofram.
- an object of the present invention is to provide a liquid-cooled cathode ray tube device that does not cause various inconveniences even if a liquid leak occurs.
- the projection display device of the present invention is a projection display device using a liquid-cooled cathode-ray tube device equipped with a liquid-cooling means filled with a cooling liquid for cooling a front panel of the cathode-ray tube.
- a tray is provided below the liquid cooling means of the liquid-cooled cathode ray tube device.
- the tray is provided below the liquid cooling means of the liquid-cooled cathode ray tube device, the leaked cooling liquid is received by the tray, and is dripped from a gap such as a mounting part. In addition, it does not fall down to the lower circuit board or high-voltage wiring through the wire and the like, and does not cause various inconveniences.
- FIG. 1 is a schematic diagram of an example of the best mode for carrying out the projection display device of the present invention.
- FIG. 2 is a rear perspective view of an example of the projection display device.
- FIG. 3 is an external perspective view showing an example of a main part of a best mode for implementing the projection display device of the present invention.
- FIG. 4 shows an example of a liquid-cooled cathode ray tube, where A is a cross-sectional view and B is a perspective view.
- FIG. 5 is a partially enlarged perspective view seen from the direction of arrow M in FIG.
- FIG. 6 is a configuration diagram showing a relationship between the liquid-cooled cathode ray tube and the tray in the example of FIG.
- FIG. 7 shows an example of the tray, where A is a perspective view from above and B is a perspective view from below.
- FIG. 8 is a partially enlarged perspective view seen from the direction of arrow N in FIG.
- FIG. 9 is a schematic diagram showing an example of a conventional projection display device.
- the projection display device 101 of the present example is configured as shown in the schematic diagram of FIG. In FIG. 1, the screen 104 is fitted into the upper front of the cabinet 105, and the upper back of the cabinet 105 is reflected at a position facing the screen 104.
- Mirror 103 is provided. Further, a liquid-cooled cathode ray tube device 102 as a projection tube is arranged so as to face the surface of the reflection mirror 103.
- this liquid-cooled cathode ray tube device 10 As the projection display device 101, this liquid-cooled cathode ray tube device 10
- the projection light 106 projected from the second power is reflected by the reflection mirror 103, enters the screen 104, and projects the specified image on the screen 104. This allows you to see the projection screen from the front of the screen 104.
- FIG. 2 is an overall external perspective view of the projection display device 101 of the present example as viewed from the back.
- FIG. 3 is a perspective view of the entire exterior of the projection display device 101 of the present example from the back with the lower exterior plate of the cabinet 105 removed, and the lower part shows various circuit boards, connectors, and the like.
- the three liquid-cooled cathode ray tube devices 102-1, 102-2, 102-3 are mounted to be inclined in the direction of the reflection mirror 103.
- FIG. 4A is a cross-sectional view of the liquid-cooled cathode ray tube device 102 used in this example
- FIG. 4B is a perspective view of the liquid-cooled cathode ray tube device 102 used in this example.
- This liquid-cooled cathode ray tube device 102 is composed of a cathode ray tube 201, cooling means 202, and a projection lens 203 mounted on the front of the cooling means 202.
- the cooling means 202 cools the front panel 201a of the cathode ray tube 201, so that a coupler 111 serving as a cooling liquid sealing member is fixed to the front panel la side.
- the final lens 13 of the projection lens system is brought into close contact with the opening 1 2 facing the front panel 20 la of 1, and the front panel 20 la of the cathode ray tube body 201, the coupler 11 and the final lens 13
- the cooling liquid 14 is injected into the enclosed space.
- the coupler 11 is fixed to the cathode ray tube main body 201 by a fixing panel 16 while being tightly attached to the front panel 20 la via the packing 15.
- the final lens 13 is fixed to the coupler 11 by the lens fixing plate 18 in a state of being in close contact with the coupler 11 via the packing 17.
- the coupler 11 is provided with a liquid inlet 19, through which the coolant 14 is injected and filled into the coupler 11.
- the liquid inlet 19 has a thread (female screw) 20 formed inside, After injecting the coolant 14 through the inlet 19, it is sealed with the sealing screw 21 via the O-ring which is a sealing material.
- a pressure adjusting valve for adjusting the pressure of the coolant 14, that is, Velofram 22 is provided on the front side of the coupler 11.
- the bellofram 22 is usually formed of a film made of ethylene propylene rubber (EPDM), a compounded material of ethylene propylene rubber and silicon, or butyl rubber (IIR).
- EPDM ethylene propylene rubber
- IIR butyl rubber
- the bellofram 22 is in an equilibrium state, a state expanding toward the outside air, and a state concaved toward the coolant side, depending on the state of the volume of the coolant due to the temperature change. Thereby, the pressure of the coolant is adjusted.
- FIGS. 3 and 5 enlarged perspective view as viewed from the arrow M in FIG. 3
- three liquid-cooled cathode ray tube devices are mounted side by side. 0 2-2, 1 0 2-3
- the liquid-cooled cathode ray tube 10 2-1 is the cathode ray tube
- FIG. 6 is a detailed diagram thereof.
- a liquid-cooled cathode ray tube 102 is attached to a mounting bracket 28 provided at a predetermined position of a projection display device 101 with a screw 301.
- the tray 23 is also attached to the mounting bracket 28 with screws 302, and the 0 rm pressure block 25 is mounted to the mounting bracket 28 via mounting means (not shown).
- 2 9 indicates the position of the vent flam 22, and when the velofram 22 is damaged, the coolant flowing out of the vent flam 22 is indicated by an arrow A. Flows into the tray 23 through the drain hole 30 provided in the corner of the mounting bracket 28.
- the tray 23 has a substantially rectangular box shape formed of an insulating plastic or the like. As shown in FIG. 5, the length of the tray 23 in the longitudinal direction is three. Liquid cooled cathode ray tube device 1 0 2 — 1, 1 0
- a rib 23a for partitioning is provided on the upper surface of the tray 23, divided into two rows in the longitudinal direction, and each row is further divided into six pieces to form a square shape.
- the height is formed lower than the side wall 23 of the outer frame of the tray 23.
- FIG. 7B As shown in FIG. 7B, four hooks 23 b are provided on the lower surface of the tray 23 at equal intervals in the longitudinal direction of the tray 23. Then, as shown in FIG. 8 (an enlarged perspective view seen from the arrow N in FIG. 3), the high voltage wiring 27 is supported by the hook 23 provided on the lower surface of the tray 23. Like that. In this case, the tray 23 serves as an eave so that the coolant 14 does not drop directly to the high-voltage wiring 27.
- the cooling liquid 14 has leaked from the liquid cooling means 202 of the liquid-cooled cathode ray tube devices 102-1, 102-2, 102-3.
- the cooling liquid 14 which is received by the tray 23 provided below the liquid cooling means 202 does not drip from the clearance of the mounting parts, etc. It does not travel down to the lower circuit board or high voltage wiring 27.
- the tray 23 is provided with ribs 23a and divided into squares, the cooling liquid 14 can be dammed by the dam principle.
- the leaked coolant 14 first enters the first row of cells near the liquid cooling means 202 in the two rows in the longitudinal direction of the cell of the tray 23, and there, When it is full, it will be stored in the second row of cells below. Then, the coolant 14 infiltrates or falls on the circuit board in the device.
- the effect of preventing liquid leakage can be further improved by putting a water-absorbing material such as a sponge into each of the partitions.
- a leak detection sensor may be provided inside the tray 23 to check for leaks.
- high-voltage wiring 27 such as wiring for supply to a cathode (not shown) of the cathode ray tube 201 is passed through the hook 23 b provided on the lower surface of the tray 23. Even if the leaked coolant splatters, the tray 23 itself plays a role like an eave, and the coolant
- the present invention is not limited to the above-described example, and can be variously modified without departing from the gist of the present invention.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Projection Apparatus (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04772181A EP1659448A1 (en) | 2003-08-21 | 2004-08-19 | Projection display device |
JP2005513623A JPWO2005024509A1 (ja) | 2003-08-21 | 2004-08-19 | 投写型表示装置 |
US10/531,707 US20060139576A1 (en) | 2003-08-21 | 2004-08-19 | Projection display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-208301 | 2003-08-21 | ||
JP2003208301 | 2003-08-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005024509A1 true WO2005024509A1 (ja) | 2005-03-17 |
WO2005024509B1 WO2005024509B1 (ja) | 2005-05-19 |
Family
ID=34263952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/012225 WO2005024509A1 (ja) | 2003-08-21 | 2004-08-19 | 投写型表示装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20060139576A1 (ja) |
EP (1) | EP1659448A1 (ja) |
JP (1) | JPWO2005024509A1 (ja) |
KR (1) | KR20060038904A (ja) |
CN (1) | CN1701272A (ja) |
TW (1) | TWI249953B (ja) |
WO (1) | WO2005024509A1 (ja) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08331492A (ja) * | 1995-06-05 | 1996-12-13 | Mitsubishi Electric Corp | 背面透過型プロジェクションテレビ |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3508433B2 (ja) * | 1996-11-25 | 2004-03-22 | ソニー株式会社 | 液冷型陰極線管装置 |
US6253399B1 (en) * | 1997-05-02 | 2001-07-03 | William J. Wagner | Tray caddy |
JPH11233051A (ja) * | 1998-02-13 | 1999-08-27 | Sony Corp | 表示装置 |
KR100299970B1 (ko) * | 1999-03-31 | 2001-10-29 | 윤종용 | 프로젝션 티브이의 냉각장치 |
US6273021B1 (en) * | 1999-05-21 | 2001-08-14 | Kevin Pembroke | Oil spill prevention apparatus |
KR100366655B1 (ko) * | 2000-08-12 | 2003-01-09 | 삼성전자 주식회사 | 프로젝션 텔레비젼의 crt 조립체 |
US20040160580A1 (en) * | 2002-10-01 | 2004-08-19 | Hitachi Electronic Devices (Usa), Inc. | Projection coupler with bubble trap |
US20050133421A1 (en) * | 2003-12-22 | 2005-06-23 | Peet C. A. | Ribbed plastic tray insert apparatus and method for supporting filter media in an engine or transmission filter |
-
2004
- 2004-08-19 CN CNA2004800010991A patent/CN1701272A/zh active Pending
- 2004-08-19 KR KR1020057006765A patent/KR20060038904A/ko not_active Application Discontinuation
- 2004-08-19 JP JP2005513623A patent/JPWO2005024509A1/ja active Pending
- 2004-08-19 US US10/531,707 patent/US20060139576A1/en not_active Abandoned
- 2004-08-19 WO PCT/JP2004/012225 patent/WO2005024509A1/ja active Application Filing
- 2004-08-19 EP EP04772181A patent/EP1659448A1/en not_active Withdrawn
- 2004-08-20 TW TW093125227A patent/TWI249953B/zh not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08331492A (ja) * | 1995-06-05 | 1996-12-13 | Mitsubishi Electric Corp | 背面透過型プロジェクションテレビ |
Also Published As
Publication number | Publication date |
---|---|
EP1659448A1 (en) | 2006-05-24 |
TWI249953B (en) | 2006-02-21 |
WO2005024509B1 (ja) | 2005-05-19 |
CN1701272A (zh) | 2005-11-23 |
JPWO2005024509A1 (ja) | 2006-11-09 |
US20060139576A1 (en) | 2006-06-29 |
TW200520557A (en) | 2005-06-16 |
KR20060038904A (ko) | 2006-05-04 |
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