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GB2190213A - Visual display unit with a shield and indirect viewing system - Google Patents

Visual display unit with a shield and indirect viewing system Download PDF

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Publication number
GB2190213A
GB2190213A GB08709377A GB8709377A GB2190213A GB 2190213 A GB2190213 A GB 2190213A GB 08709377 A GB08709377 A GB 08709377A GB 8709377 A GB8709377 A GB 8709377A GB 2190213 A GB2190213 A GB 2190213A
Authority
GB
United Kingdom
Prior art keywords
shield
user
mirror
display
screen
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.)
Withdrawn
Application number
GB08709377A
Other versions
GB8709377D0 (en
Inventor
Hugh Barrie Morley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB8709377D0 publication Critical patent/GB8709377D0/en
Publication of GB2190213A publication Critical patent/GB2190213A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/02—Catoptric systems, e.g. image erecting and reversing system
    • G02B17/023—Catoptric systems, e.g. image erecting and reversing system for extending or folding an optical path, e.g. delay lines
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies
    • G02B27/026—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies and a display device, e.g. CRT, LCD, for adding markings or signs or to enhance the contrast of the viewed object

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

A visual display unit 11 has a screen 12 and a user is protected from electromagnetic radiation by a shield wall 14 and sides 15 and an optical system of plane mirrors 17, 18 enables a user to see the display indirectly. The mirror may be adjustable in inclination to the vertical and the mirror 18 can be moved fore-and-aft in recesses 22. The shield may take the form of a desk with the unit 11 and mirror 17 beneath the desk top and mirror 18 above. <IMAGE>

Description

SPECIFICATION Improvements in or relating to shields This invention relates to shields and shielding.
According to one aspect of this invention a shield system for use with apparatus providing a visual display comprises a shield for location between a user and the display, and an opti cal system by use of which the user may view the display.
The optical system may comprise two spaced mirrors one facing the display and the other receiving a reflection from the one mir ror and producing an image for viewing by a user. The mirrors may be plane.
Means may be provided for varying the relative positions of the mirrors. Means may be provided for varying the inclination of the mir rors to the vertical.
There may be means for adjusting the optical system to enable the position of a user to be changed.
The shield may comprise a desk having a top below the level of which the display is located.
The shield may comprise a wall and in one case said other mirror may rest on sides of the shield. The other mirror may be adjustable fore and aft on said sides.
Said other mirror may be mounted in support elements angularly adjustable about a transverse axis. The invention provides visual display apparatus having such a shield system.
The invention also provides a visual display apparatus having a shielded screen and with an optical system enabling the display to be viewed indirectly.
The optical system may comprise a screen.
The invention may be performed in various ways and one specific embodiment with possible modifications will now be described by way of example with reference to the accompanying somewhat schematic drawings, in which: Figure 1 is a side view; Figure 2 is a front view; and Figure 3 is another side view.
The apparatus 10 provides a visual display unit (VDU) 11 which may for example be associated with a microprocessor and a printer and keyboard for use by a typist. The unit 11 has a conventional screen 12 on which a visual display can be seen. The present arrangement is concerned with protecting a user of the unit 11 from possible harmful effects from electromagnetic radiation associated with the unit 11 and the display. A shield 13 is provided having a front 14 and sides 15 positioned so that the screen 11 is obscured to the front by the shield 13. The shield 13 may for example be a suitable metal e.g. lead, preferably on a suitable substrate or planar support.
In order that a user at the front of the unit may still use the unit 11, an optical system 16 is provided. The system 16 comprises a plane mirror 17 in front of and facing the screen, and a plane mirror 18 facing forwards and located above the unit 11. As shown in Fig. 3, the display is reflected in mirrors 17, 18 and can be seen by a user. The front wall 14 need not be vertical but could be inclined forwards. The mirror 17 may be mounted on the rear of wall 14 or on a separate mounting and may be mounted to have an adjustable inclination to the vertical. The mirror 18 also preferably has an adjustable inclination to the vertical. For example the side edges of mirror 18 may be located in diametral slits in roller support elements 20 which can be manually adjusted about a transverse axis 21.The tops of the sides 15 may have a series of recesses 22 optionally to receive the rollers 20 for fore-and-aft adjustment. The parallel mirrors 17, 18 can readily be removed for cleaning.
As shown, the line of sight of a user is above the top of the screen. Sides 15 could in some cases be omitted and mirror 18 supported on a stand.
In some arrangements the optical system may be positioned and designed to enable a user to be somewhat to one side of a foreand-aft or directly in front position with respect to the screen. In some cases the user or viewer can be on a level with the screen but to one side thereof.
In another arrangement shown dotted in Fig.
3, the unit 11 is sunk in a metal desk 30 having an opening 32 in a top 31 so that the screen is not visible directly by a user. In such a case the desk may act as a shield so that the separate shield may in some cases be omitted. The mirrors may be adjustable as above.
In the case where sides 15 are omitted, the shield may be of extended width. Use of the shield arrangement reduces the risk of radiation from the visual display unit escaping to the exterior of a building; such escaped radiation might be sensed to obtain information.
The arrangement of Fig. 3 would preferably include the screen 14, 15.
In some cases the mirror 1 7 may the shield or part thereof.
1. A shield system for use with apparatus providing a visual display comprising a shield for location between a user and the display, and an optical system by use of which the user may view the display.
2. A shield system as claimed in claim 1, in which the optical system comprises two spaced mirrors one facing the display and the other receiving a reflection from the one mirror and producing an image for viewing by a user.
3. A shield system as claimed in claim 2, in which the mirrors are plane.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (1)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECIFICATION Improvements in or relating to shields This invention relates to shields and shielding.
    According to one aspect of this invention a shield system for use with apparatus providing a visual display comprises a shield for location between a user and the display, and an opti cal system by use of which the user may view the display.
    The optical system may comprise two spaced mirrors one facing the display and the other receiving a reflection from the one mir ror and producing an image for viewing by a user. The mirrors may be plane.
    Means may be provided for varying the relative positions of the mirrors. Means may be provided for varying the inclination of the mir rors to the vertical.
    There may be means for adjusting the optical system to enable the position of a user to be changed.
    The shield may comprise a desk having a top below the level of which the display is located.
    The shield may comprise a wall and in one case said other mirror may rest on sides of the shield. The other mirror may be adjustable fore and aft on said sides.
    Said other mirror may be mounted in support elements angularly adjustable about a transverse axis. The invention provides visual display apparatus having such a shield system.
    The invention also provides a visual display apparatus having a shielded screen and with an optical system enabling the display to be viewed indirectly.
    The optical system may comprise a screen.
    The invention may be performed in various ways and one specific embodiment with possible modifications will now be described by way of example with reference to the accompanying somewhat schematic drawings, in which: Figure 1 is a side view; Figure 2 is a front view; and Figure 3 is another side view.
    The apparatus 10 provides a visual display unit (VDU) 11 which may for example be associated with a microprocessor and a printer and keyboard for use by a typist. The unit 11 has a conventional screen 12 on which a visual display can be seen. The present arrangement is concerned with protecting a user of the unit 11 from possible harmful effects from electromagnetic radiation associated with the unit 11 and the display. A shield 13 is provided having a front 14 and sides 15 positioned so that the screen 11 is obscured to the front by the shield 13. The shield 13 may for example be a suitable metal e.g. lead, preferably on a suitable substrate or planar support.
    In order that a user at the front of the unit may still use the unit 11, an optical system
    16 is provided. The system 16 comprises a plane mirror 17 in front of and facing the screen, and a plane mirror 18 facing forwards and located above the unit 11. As shown in Fig. 3, the display is reflected in mirrors 17,
    18 and can be seen by a user. The front wall
    14 need not be vertical but could be inclined forwards. The mirror 17 may be mounted on the rear of wall 14 or on a separate mounting and may be mounted to have an adjustable inclination to the vertical. The mirror 18 also preferably has an adjustable inclination to the vertical. For example the side edges of mirror
    18 may be located in diametral slits in roller support elements 20 which can be manually adjusted about a transverse axis 21.The tops of the sides 15 may have a series of recesses 22 optionally to receive the rollers 20 for fore-and-aft adjustment. The parallel mirrors 17, 18 can readily be removed for cleaning.
    As shown, the line of sight of a user is above the top of the screen. Sides 15 could in some cases be omitted and mirror 18 supported on a stand.
    In some arrangements the optical system may be positioned and designed to enable a user to be somewhat to one side of a foreand-aft or directly in front position with respect to the screen. In some cases the user or viewer can be on a level with the screen but to one side thereof.
    In another arrangement shown dotted in Fig.
    3, the unit 11 is sunk in a metal desk 30 having an opening 32 in a top 31 so that the screen is not visible directly by a user. In such a case the desk may act as a shield so that the separate shield may in some cases be omitted. The mirrors may be adjustable as above.
    In the case where sides 15 are omitted, the shield may be of extended width. Use of the shield arrangement reduces the risk of radiation from the visual display unit escaping to the exterior of a building; such escaped radiation might be sensed to obtain information.
    The arrangement of Fig. 3 would preferably include the screen 14, 15.
    In some cases the mirror 1 7 may the shield or part thereof.
    1. A shield system for use with apparatus providing a visual display comprising a shield for location between a user and the display, and an optical system by use of which the user may view the display.
    2. A shield system as claimed in claim 1, in which the optical system comprises two spaced mirrors one facing the display and the other receiving a reflection from the one mirror and producing an image for viewing by a user.
    3. A shield system as claimed in claim 2, in which the mirrors are plane.
    4. A shield system as claimed in claim 2 or claim 3, including means for varying the inclination of the mirrors to the vertical.
    5. A shield system as claimed in claim 1, including means for adjusting the optical system to enable the position of a user to be changed.
    6. A shield system as claimed in any preceding claim, in which the shield comprises a desk having a top below the level of which the display is located.
    7. A shield system as claimed in any of claims 1 to 5, in which the shield comprises a wall.
    8. A shield system as claimed in claim 7 when dependent on claim 2, in which said other mirror rests on sides of the shield.
    9. A shield system as claimed in claim 8, in which the other mirror is adjustable fore and aft on said sides.
    10. A shield system as claimed in claim 8 or claim 9, in which said other mirror is mounted in support elements angularly adjustable about a transverse axis.
    11. A shield system for use with apparatus providing a visual display substantially as hereinbefore described with reference to and as shown in Figs. 1 and 2, or Fig. 3, of the accompanying drawings.
    12. Visual display apparatus having a shield system as claimed in any preceding claim.
    13. A visual display apparatus having a shielded screen and with an optical system enabling the display to be viewed indirectly.
    14. A visual display apparatus as claimed in claim 13, in which the optical system comprises a screen.
GB08709377A 1986-04-22 1987-04-21 Visual display unit with a shield and indirect viewing system Withdrawn GB2190213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868609816A GB8609816D0 (en) 1986-04-22 1986-04-22 Shields

Publications (2)

Publication Number Publication Date
GB8709377D0 GB8709377D0 (en) 1987-05-28
GB2190213A true GB2190213A (en) 1987-11-11

Family

ID=10596628

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868609816A Pending GB8609816D0 (en) 1986-04-22 1986-04-22 Shields
GB08709377A Withdrawn GB2190213A (en) 1986-04-22 1987-04-21 Visual display unit with a shield and indirect viewing system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868609816A Pending GB8609816D0 (en) 1986-04-22 1986-04-22 Shields

Country Status (1)

Country Link
GB (2) GB8609816D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034172A1 (en) * 1996-03-14 1997-09-18 Designaware Trading Limited Monitor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1113674A (en) * 1966-03-26 1968-05-15 Wilhelmine Zipse Apparatus for viewing television pictures
GB1382686A (en) * 1971-05-13 1975-02-05 Tavernier A Protective screens for television apparatus
GB2010647A (en) * 1977-12-14 1979-06-27 Matsushita Electric Ind Co Ltd Projection type television set
GB1594288A (en) * 1977-05-17 1981-07-30 Thomson Csf Display collimator system including a standby reticle arrangement
EP0131988A1 (en) * 1983-06-28 1985-01-23 Koninklijke Philips Electronics N.V. Video rear-screen projection apparatus
US4605291A (en) * 1984-10-24 1986-08-12 Jolly Thomas A Cathode ray tube screen viewing aid

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1113674A (en) * 1966-03-26 1968-05-15 Wilhelmine Zipse Apparatus for viewing television pictures
GB1382686A (en) * 1971-05-13 1975-02-05 Tavernier A Protective screens for television apparatus
GB1594288A (en) * 1977-05-17 1981-07-30 Thomson Csf Display collimator system including a standby reticle arrangement
GB2010647A (en) * 1977-12-14 1979-06-27 Matsushita Electric Ind Co Ltd Projection type television set
EP0131988A1 (en) * 1983-06-28 1985-01-23 Koninklijke Philips Electronics N.V. Video rear-screen projection apparatus
US4605291A (en) * 1984-10-24 1986-08-12 Jolly Thomas A Cathode ray tube screen viewing aid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034172A1 (en) * 1996-03-14 1997-09-18 Designaware Trading Limited Monitor
US6244718B1 (en) 1996-03-14 2001-06-12 Designaware Trading Limited Monitor with rear view mirror

Also Published As

Publication number Publication date
GB8709377D0 (en) 1987-05-28
GB8609816D0 (en) 1986-05-29

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Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)