WO1984002820A1 - Improvements in video display units - Google Patents

Improvements in video display units Download PDF

Info

Publication number
WO1984002820A1
WO1984002820A1 PCT/GB1983/000354 GB8300354W WO8402820A1 WO 1984002820 A1 WO1984002820 A1 WO 1984002820A1 GB 8300354 W GB8300354 W GB 8300354W WO 8402820 A1 WO8402820 A1 WO 8402820A1
Authority
WO
WIPO (PCT)
Prior art keywords
video display
display unit
enclosure
metal
video
Prior art date
Application number
PCT/GB1983/000354
Other languages
French (fr)
Inventor
Anthony Martinez
Original Assignee
Microvitec Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Microvitec Ltd filed Critical Microvitec Ltd
Priority to JP84500453A priority Critical patent/JPS60500745A/en
Priority to GB08420160A priority patent/GB2141609B/en
Publication of WO1984002820A1 publication Critical patent/WO1984002820A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers

Definitions

  • This application relates to improvements in video display units and especially to improvements in the external casing of video display units.
  • tubes are always surrounded by high voltage and high energy circuits required for driving the tube. It is therefore essential to achieve complete isolation of the circuits associated with the tube from the rest of the circuits associated with any other sub-system.
  • & video display unit having a casing comprising a screen and an enclosure is characterised in that the enclosure is made of metal.
  • New technology has enabled video units to be designed with a very:.low power dissipation. In most visual display units this power dissipation may be kept to below 80W.
  • Metal is a good radiator of heat and this low level of power can effectively be dissipated through the metal case. The greatest advantage of the system is therefore that no ventilation openings such as slots and louvres are required in the casing. This has many advantages.
  • the metal case is a screen
  • the whole video display unit may now be hermetically sealed which means that the display unit can be used in a dangerous environ ⁇ ment.
  • the video tube may be sealed into the enclosure by a rubber gromraets.
  • the screen is preferably affixed to the enclosure by a rubber seal. This means that the video . display unit is waterproof.
  • the video display unit may be used with no problems caused by any spillages of beverages or other drinks.
  • a knocked over cup can cause liquid to enter the unit and : comeinto contact with the circuits and tube within:,
  • the display Since no ventilation holes are required in- the enclosure, the display is safe since children cannot stick either their fingers or other objects into the enclosure to electrocute themselves.
  • video display units may be television displays.
  • they are used for the new ,generation of colour displays which are used in conjunction with a wide variety of applications such as Viewdata, Prestel, Antiope, Teledon, Unit Video, Interactive Television, Cable Television, microcomputer displays, games, education and information terminals, learning centres, advertising, point of slales terminals, industrial displays and process controls.
  • Any metal which is a good heat conductor may be used for the enclosure, such as, copper, silver, aluminium or zince, or zinc alloys.
  • OMPI non-ferrous to avoid the complications caused by earth magnetic fields.
  • the enclosure is aluminium since this is a very light material. Also this means that the enclosure maybe made by die casting which provides a cheap and efficient method of manufacturing the enclosures.
  • the thickness of the metal is preferably between 18 and 24 gauge to achieve the heat dissipation through the enclosure.
  • the thickness is more preferably 22 gauge.
  • the enclosure may be made " in any size but is preferably just bigger than one of the standard, 12", 14", 20", 22", 24", 26" tubes. If the enclosure is large enough to fit the tube inside then the surface area of the enclosure will be large enough to dissipate the heat produced by the tube and its associated circuits.
  • a video display unit 1 comprises a glass screeen 2 and a metal enclosure 3.
  • the screen 2 is a standard 20" screen.
  • Within the enclosure 3 is situated a 20" colour tube 4.
  • Driver circuits 5 to drive the tube 4 are also contained within the casing 3.
  • the metal enclosure 3 is die-cast aluminium and has a thickness of 22 gauge. It is thus light and inexpensive.
  • a rubber seal 6 seals the screen 2 to the enclosure 3.
  • a further rubber seal 7 seals the tube 4 within the enclosure 3.
  • the enclosure 3 is continuous with no slots, holes or other ventilation openings. All heat dissipated by the tube 4 and circuits 5 is radiated through the metal enclosure 3. Thus nothing can enter the visual display unit 1, such as liquid split, or a childs fingers,making it very safe.
  • the control button 8 is situated below the screen 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Improvements in video display units and especially to improvements in the external casing of video units. According to this invention, a video display unit (1) a casing comprising a screen (2) and an enclosure (3), is characterized in that the enclosure (3) is made of metal.

Description

• IMPROVEMENTS' IN VIDEO DISPLAY UNITS
This application relates to improvements in video display units and especially to improvements in the external casing of video display units.
The concept of separating the display side of a system from the rest of the interface and other subsystems such as audio amplifiers, speakers, tuners and intermediate amplifiers, has led to the development of stand-alone video, display units.
Display, tubes are always surrounded by high voltage and high energy circuits required for driving the tube. It is therefore essential to achieve complete isolation of the circuits associated with the tube from the rest of the circuits associated with any other sub-system.
According to this invention & video display unit having a casing comprising a screen and an enclosure, is characterised in that the enclosure is made of metal. New technology has enabled video units to be designed with a very:.low power dissipation. In most visual display units this power dissipation may be kept to below 80W. Metal is a good radiator of heat and this low level of power can effectively be dissipated through the metal case. The greatest advantage of the system is therefore that no ventilation openings such as slots and louvres are required in the casing. This has many advantages. The metal case is a screen
OMPI for radio frequency interference.' This screening however is improved so that it is almost complete,by the absence of any ventilation openings.
Since the enclosure is metal it means that it is fire proof and consequently very safe* The whole video display unit may now be hermetically sealed which means that the display unit can be used in a dangerous environ¬ ment.
The video tube may be sealed into the enclosure by a rubber gromraets. The screen is preferably affixed to the enclosure by a rubber seal. This means that the video . display unit is waterproof. Thus in an office environment the video display unit may be used with no problems caused by any spillages of beverages or other drinks. With a conventional visual display unit, a knocked over cup can cause liquid to enter the unit and: comeinto contact with the circuits and tube within:,
Since no ventilation holes are required in- the enclosure, the display is safe since children cannot stick either their fingers or other objects into the enclosure to electrocute themselves.
This invention makes it possible to produce equipment which is very attractive and at the same time meets standards of safety never before achieved in the domestic environment. These video display units may be television displays. Preferably they are used for the new ,generation of colour displays which are used in conjunction with a wide variety of applications such as Viewdata, Prestel, Antiope, Teledon, Unit Video, Interactive Television, Cable Television, microcomputer displays, games, education and information terminals, learning centres, advertising, point of slales terminals, industrial displays and process controls.
Any metal which is a good heat conductor may be used for the enclosure, such as, copper, silver, aluminium or zince, or zinc alloys.
With colour tubes it is preferable that the metal is
OMPI non-ferrous to avoid the complications caused by earth magnetic fields.
.Most preferably the enclosure is aluminium since this is a very light material. Also this means that the enclosure maybe made by die casting which provides a cheap and efficient method of manufacturing the enclosures.
The thickness of the metal is preferably between 18 and 24 gauge to achieve the heat dissipation through the enclosure. The thickness is more preferably 22 gauge. The enclosure may be made "in any size but is preferably just bigger than one of the standard, 12", 14", 20", 22", 24", 26" tubes. If the enclosure is large enough to fit the tube inside then the surface area of the enclosure will be large enough to dissipate the heat produced by the tube and its associated circuits.
An example of a video display unit in accordance ,with this invention will now be described with reference to the accompanying drawing which is a section through the video display unit. A video display unit 1 comprises a glass screeen 2 and a metal enclosure 3. The screen 2 is a standard 20" screen. Within the enclosure 3 is situated a 20" colour tube 4. Driver circuits 5 to drive the tube 4 are also contained within the casing 3. The metal enclosure 3 is die-cast aluminium and has a thickness of 22 gauge. It is thus light and inexpensive. A rubber seal 6 seals the screen 2 to the enclosure 3. A further rubber seal 7 seals the tube 4 within the enclosure 3. The enclosure 3 is continuous with no slots, holes or other ventilation openings. All heat dissipated by the tube 4 and circuits 5 is radiated through the metal enclosure 3. Thus nothing can enter the visual display unit 1, such as liquid split, or a childs fingers,making it very safe. The control button 8 is situated below the screen 2.
A rubber grommet 9, seals the button 8 to the enclosure 3 to ensure that the cabinet 1 is completely waterproof. It is also fireproof and provides an effective screen against radio frequency interference.
P

Claims

CLAIMS :
1. A video. display unit having a casing comprising a screen and an enclosure characterised in that the enclosure is made of metal.
2. A video display unit in3.aecordance with claim 1, 5 in which the metal enclosure includes no ventilation open¬ ings.
3. A video display unit in accordance with the claim 2, in which the casing and screen are hermetically sealed.
10.
4. A video display unit in accordance with any one of. claims 1, 2 or 3, which is a television display.
5. A video display unit in accordance with any one of the preceding claims in which the video tube is a colour tube and the metal casing is non-ferrous. 5
6. A video display unit in accordance with any one of claims 1. to 5, in which the metal casing is aluminium or zinc alloy.
7. A video display unit in accordance with claim 6, in which the casing is made by die-casting. 20
8. A video display unit in accordance with any one of the preceding claims, in which the thickness of the metal is between 18 and 24 gauge.
9. A video display unit in accordance with claim 1 and substantially as herein described. 25 10. A video display unit substantially as herein described with reference to the accompanying drawing.
PCT/GB1983/000354 1982-12-30 1983-12-29 Improvements in video display units WO1984002820A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP84500453A JPS60500745A (en) 1982-12-30 1983-12-29 Improvements in video display equipment
GB08420160A GB2141609B (en) 1982-12-30 1983-12-29 Improvements in video display units

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8236938 1982-12-30

Publications (1)

Publication Number Publication Date
WO1984002820A1 true WO1984002820A1 (en) 1984-07-19

Family

ID=10535282

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1983/000354 WO1984002820A1 (en) 1982-12-30 1983-12-29 Improvements in video display units

Country Status (3)

Country Link
EP (1) EP0131014A1 (en)
GB (1) GB2141609B (en)
WO (1) WO1984002820A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513216A1 (en) * 1984-05-28 1985-11-28 Mitsubishi Electric Corp., Tokio/Tokyo Display device
FR2709633A1 (en) * 1993-08-31 1995-03-10 Samsung Display Devices Co Ltd Image display device emitting in the far infrared

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695206A (en) * 1954-01-19 1954-11-23 Heintz Mfg Co Television cabinet
US2929667A (en) * 1954-07-06 1960-03-22 Pye Ltd Cabinets
FR1489194A (en) * 1966-06-09 1967-07-21 Improvements in the manufacture of televisions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695206A (en) * 1954-01-19 1954-11-23 Heintz Mfg Co Television cabinet
US2929667A (en) * 1954-07-06 1960-03-22 Pye Ltd Cabinets
FR1489194A (en) * 1966-06-09 1967-07-21 Improvements in the manufacture of televisions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513216A1 (en) * 1984-05-28 1985-11-28 Mitsubishi Electric Corp., Tokio/Tokyo Display device
FR2709633A1 (en) * 1993-08-31 1995-03-10 Samsung Display Devices Co Ltd Image display device emitting in the far infrared
NL9301498A (en) * 1993-08-31 1995-03-16 Samsung Display Devices Co Ltd Far infrared transmitting image display device.

Also Published As

Publication number Publication date
GB2141609B (en) 1986-08-06
GB8420160D0 (en) 1984-09-12
GB2141609A (en) 1984-12-19
EP0131014A1 (en) 1985-01-16

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