EP0072782A2 - Method and apparatus for eliminating aerosol particles in display screen environments - Google Patents

Method and apparatus for eliminating aerosol particles in display screen environments Download PDF

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Publication number
EP0072782A2
EP0072782A2 EP82850135A EP82850135A EP0072782A2 EP 0072782 A2 EP0072782 A2 EP 0072782A2 EP 82850135 A EP82850135 A EP 82850135A EP 82850135 A EP82850135 A EP 82850135A EP 0072782 A2 EP0072782 A2 EP 0072782A2
Authority
EP
European Patent Office
Prior art keywords
screen
display screen
electrically conductive
frame
net
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
Application number
EP82850135A
Other languages
German (de)
French (fr)
Other versions
EP0072782A3 (en
Inventor
Mats Hedström
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.)
Power System AB
Original Assignee
Power System AB
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 Power System AB filed Critical Power System AB
Publication of EP0072782A2 publication Critical patent/EP0072782A2/en
Publication of EP0072782A3 publication Critical patent/EP0072782A3/en
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/02—Carrying-off electrostatic charges by means of earthing connections

Definitions

  • the present invention relates to a method and apparatus for screening aerosol particles in display screen environments.
  • Display screens namely generate an electric field with potentials up to + 15 000 V.
  • the display reader also becomes charged, e.g. by rubbing the feet on the floor.
  • the potential for the reader is + 3 000 V to - 6 000 V.
  • the field strength between the display unit and-reader can reach 40 000 V/m.
  • the particles in the surrounding air become electrically charged, and this leads to a flow of particles in the electric-field between screen and reader. These particles become deposited on the reader's face, where they adhere, causing the afflictions mentioned above.
  • the present invention has the object of providing a method and an apparatus for inhibiting the infringement of such particles on the reader.
  • the apparatus depicted in Figures 1 and 2 includes a screen 1, which is shown to be rectangular, although it may be square, or have another shape, and it has sufficient area to cover a display screen, in front of which it is intended to be placed.
  • the inventive screen comprises a rectangular, electrically conductive frame 2 with a fine mesh nylon net 3 stretched over it, and with electrically conductive wires 4 stretched between opposing parts in the frame 2, in contact with the net 3, as illustrated in Figures 1 and 2.
  • the numeral 5 denotes the frame connection to earth potential.
  • the number of wires 4 is suited to the size of the frame 2, and in turn the latter is adjusted to the size of the display screen in front of the image tube of a visual display unit.
  • the wires 4 may be woven into the nylon net, or intertwined to a greater or less extent with it, i.e. they may run adjacent to, and across the netting threads.
  • the described screen 1 is mounted in front of the appropriate display screen, as used in visual display units.
  • the particle flows generated by the electrical field between reader and display screen will thus become neutralized by the screen 1, with its nylon netting 3 carrying the electrically conductive wires 4, which are connected to the earthed (grounded) frame 2, so that the reader's face is not subjected to any particle bombardment, whereby skin trouble and eye or throat irritation do not occur.
  • the electrical properties of the net 3 and the electrically conductive wires 4 are namely sufficient to screen off said electric field.
  • the screen 6, depicted in Figure 3 includes, as with the screen 1, an electrically conductive frame 2 with a nylon net 3 stretched across it, but the wires 4 of screen 1 have been replaced by an electrically conductive layer 7, applied for transparency, and electrically connected to the frame 2.
  • the screen 6 is suitably mounted so that the conductive layer 7 will be nearest the display screen, i.e. facing it.
  • This embodiment of the screen effectively inhibits the flow of particles towards the reader also, particularly towards his face.
  • the frame may be constructed solely from two opposing frame portions, which may be mounted in holders or on the display unit to be read.
  • the means arranged for screening the electric field i.e. the nylon netting and wires or coating.may also have other suitable embodiments. Instead of nylon any other electrically insulating plastic material may be used.

Landscapes

  • Elimination Of Static Electricity (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Non-Insulated Conductors (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Details Of Television Scanning (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

A screen (1) is provided for screening off aerosol particles in display screen environments, and includes an electrically conductive earthed frame (2) across which is stretched a fine mesh net (3) of an electrically non-conducting material and electrically conductive wires (4) in contact with the net (3) and extending between opposing portions of the frame (2), said screen neutralizing particle flows generated by electric fields between display screen and display reader.

Description

  • The present invention relates to a method and apparatus for screening aerosol particles in display screen environments.
  • More and more readers of display screens are becoming affected by skin troubles, as well as eye and throat irritation. Display screens namely generate an electric field with potentials up to + 15 000 V. The display reader also becomes charged, e.g. by rubbing the feet on the floor. The potential for the reader is + 3 000 V to - 6 000 V. The field strength between the display unit and-reader can reach 40 000 V/m. The particles in the surrounding air become electrically charged, and this leads to a flow of particles in the electric-field between screen and reader. These particles become deposited on the reader's face, where they adhere, causing the afflictions mentioned above.
  • The present invention has the object of providing a method and an apparatus for inhibiting the infringement of such particles on the reader.
  • In accordance with the invention, this object is attained by a method and apparatus, the characterizing features of which will be seen from the following description of an inventive apparatus, illustrated by way of example on the accompanying drawing.
    • Figure 1 is a view of the apparatus in accordance with the invention.
    • Figure 2 is a vertical cross section through the apparatus of Figure 1.
    • Figure 3 is a cross section as in Figure 1, but through a modified apparatus in accordance with the invention.
  • The apparatus depicted in Figures 1 and 2 includes a screen 1, which is shown to be rectangular, although it may be square, or have another shape, and it has sufficient area to cover a display screen, in front of which it is intended to be placed. The inventive screen comprises a rectangular, electrically conductive frame 2 with a fine mesh nylon net 3 stretched over it, and with electrically conductive wires 4 stretched between opposing parts in the frame 2, in contact with the net 3, as illustrated in Figures 1 and 2. The numeral 5 denotes the frame connection to earth potential. The number of wires 4 is suited to the size of the frame 2, and in turn the latter is adjusted to the size of the display screen in front of the image tube of a visual display unit. Instead of being applied according to Figures 1 and 2, the wires 4 may be woven into the nylon net, or intertwined to a greater or less extent with it, i.e. they may run adjacent to, and across the netting threads.
  • The described screen 1 is mounted in front of the appropriate display screen, as used in visual display units. The particle flows generated by the electrical field between reader and display screen will thus become neutralized by the screen 1, with its nylon netting 3 carrying the electrically conductive wires 4, which are connected to the earthed (grounded) frame 2, so that the reader's face is not subjected to any particle bombardment, whereby skin trouble and eye or throat irritation do not occur. The electrical properties of the net 3 and the electrically conductive wires 4 are namely sufficient to screen off said electric field.
  • The screen 6, depicted in Figure 3 includes, as with the screen 1, an electrically conductive frame 2 with a nylon net 3 stretched across it, but the wires 4 of screen 1 have been replaced by an electrically conductive layer 7, applied for transparency, and electrically connected to the frame 2.
  • The screen 6 is suitably mounted so that the conductive layer 7 will be nearest the display screen, i.e. facing it. This embodiment of the screen effectively inhibits the flow of particles towards the reader also, particularly towards his face.
  • The embodiment of the screen may be modified within the scope of the invention. For example, the frame may be constructed solely from two opposing frame portions, which may be mounted in holders or on the display unit to be read. The means arranged for screening the electric field, i.e. the nylon netting and wires or coating.may also have other suitable embodiments. Instead of nylon any other electrically insulating plastic material may be used.

Claims (3)

1. Method of screening aerosol particles in display screen environments characterized in that an electric field present in front of a display screen is substantially screened off by a screen (1, 6), having an electrically conductive earthed frame (2) carrying a fine mesh net (3) of an electrically non-conducting material and electrically conductive wires (4) or layer (7) in contact therewith, being mounted between the display' screen and a reader.
2. Apparatus for screening off aerosol particles in display screen environments, characterized by a screen (1, 6) intended for placing in front of a display screen, and including an electrically conductive frame (2) intended for earthing (grounding), there being stretched over said frame a fine mesh net (3) and electrically conductive wires (4) or a transparent electrically-conductive layer in contact with the net (3) and in electrically conductive communication with said frame C).
3. Apparatus as claimed in claim 2, characterized therein, that said fine mesh net (3) is a nylon net.
EP82850135A 1981-06-29 1982-06-16 Method and apparatus for eliminating aerosol particles in display screen environments Ceased EP0072782A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8104056A SE423598B (en) 1981-06-29 1981-06-29 PROCEDURE AND DEVICE FOR DISPOSAL OF AEROSOL PARTICLES IN SCREEN ENVIRONMENTS
SE8104056 1981-06-29

Publications (2)

Publication Number Publication Date
EP0072782A2 true EP0072782A2 (en) 1983-02-23
EP0072782A3 EP0072782A3 (en) 1983-05-25

Family

ID=20344166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82850135A Ceased EP0072782A3 (en) 1981-06-29 1982-06-16 Method and apparatus for eliminating aerosol particles in display screen environments

Country Status (8)

Country Link
EP (1) EP0072782A3 (en)
JP (1) JPS585948A (en)
CA (1) CA1268203C (en)
DE (1) DE72782T1 (en)
DK (1) DK152339B (en)
FI (1) FI78999C (en)
NO (1) NO161963C (en)
SE (1) SE423598B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092308A2 (en) * 1982-04-16 1983-10-26 Daca International B.V. Radiation and static electricity suppression device
GB2133935A (en) * 1982-12-17 1984-08-01 Payne John M Dissipating electrical charge from the screen of a visual display unit
US4732454A (en) * 1985-04-22 1988-03-22 Toray Industries, Inc. Light-transmissible plate shielding electromagnetic waves
KR100734638B1 (en) * 1998-07-24 2007-07-02 필립스 루미리즈 라이팅 캄파니 엘엘씨 AlGaInP LIGHT EMITTING DEVICES WITH THIN ACTIVE LAYERS

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8333125D0 (en) * 1982-12-17 1984-01-18 Payne J M Applying mask to visual display unit screen
JPS606766A (en) * 1983-06-17 1985-01-14 Sakata Shokai Ltd Water-base printing ink composition for water-repellent paper
US4567213A (en) * 1983-10-20 1986-01-28 Videojet Systems International, Inc. Ink jet printing composition
JPS60105142A (en) * 1983-11-11 1985-06-10 Meiko Seisakusho:Kk Crt screen given glare-preventive treatment
JPS6119676A (en) * 1984-07-05 1986-01-28 Sakata Shokai Ltd Water-based printing ink

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1055568A (en) * 1952-05-08 1954-02-19 Philips Nv Apparatus comprising a cathode ray tube with an image screen
US4246613A (en) * 1979-01-10 1981-01-20 Delta Data Systems Corporation Anti-glare screen with electromagnetic interference rejection
US4247737A (en) * 1979-03-29 1981-01-27 Spectrum Control, Inc. Electromagnetically shielded viewing window
US4253737A (en) * 1979-02-12 1981-03-03 Sun-Flex Company Anti-Glare device for a computer terminal display tube

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53131729A (en) * 1977-04-22 1978-11-16 Nippon Filcon Kk Antidazzling screen for crt display unit
JPS5832884A (en) * 1981-08-20 1983-02-25 Otsuka Chem Co Ltd Production of 3-exomethylenecepham derivative

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1055568A (en) * 1952-05-08 1954-02-19 Philips Nv Apparatus comprising a cathode ray tube with an image screen
US4246613A (en) * 1979-01-10 1981-01-20 Delta Data Systems Corporation Anti-glare screen with electromagnetic interference rejection
US4253737A (en) * 1979-02-12 1981-03-03 Sun-Flex Company Anti-Glare device for a computer terminal display tube
US4253737B1 (en) * 1979-02-12 1990-01-16 Sun Flex Co
US4247737A (en) * 1979-03-29 1981-01-27 Spectrum Control, Inc. Electromagnetically shielded viewing window

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092308A2 (en) * 1982-04-16 1983-10-26 Daca International B.V. Radiation and static electricity suppression device
EP0092308A3 (en) * 1982-04-16 1984-09-05 Daca International B.V. Radiation and static electricity suppression device
GB2133935A (en) * 1982-12-17 1984-08-01 Payne John M Dissipating electrical charge from the screen of a visual display unit
US4732454A (en) * 1985-04-22 1988-03-22 Toray Industries, Inc. Light-transmissible plate shielding electromagnetic waves
KR100734638B1 (en) * 1998-07-24 2007-07-02 필립스 루미리즈 라이팅 캄파니 엘엘씨 AlGaInP LIGHT EMITTING DEVICES WITH THIN ACTIVE LAYERS

Also Published As

Publication number Publication date
CA1224522A (en) 1987-07-21
DK152339B (en) 1988-02-22
NO161963C (en) 1989-10-18
DE72782T1 (en) 1983-07-21
FI822280A0 (en) 1982-06-24
FI78999C (en) 1989-10-10
CA1268203C (en) 1990-04-24
JPS585948A (en) 1983-01-13
NO161963B (en) 1989-07-10
EP0072782A3 (en) 1983-05-25
FI78999B (en) 1989-06-30
FI822280L (en) 1982-12-20
DK290082A (en) 1982-12-30
SE423598B (en) 1982-05-17
NO822013L (en) 1982-12-30

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