FR2695213A1 - Cathode tube image screen filter system - uses semi-reflecting mirror with screen at 45 degree angle to horizontal - Google Patents

Cathode tube image screen filter system - uses semi-reflecting mirror with screen at 45 degree angle to horizontal Download PDF

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Publication number
FR2695213A1
FR2695213A1 FR9210506A FR9210506A FR2695213A1 FR 2695213 A1 FR2695213 A1 FR 2695213A1 FR 9210506 A FR9210506 A FR 9210506A FR 9210506 A FR9210506 A FR 9210506A FR 2695213 A1 FR2695213 A1 FR 2695213A1
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France
Prior art keywords
screen
semi
mirror
reflecting mirror
user
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Granted
Application number
FR9210506A
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French (fr)
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FR2695213B1 (en
Inventor
Laporte Philippe
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Individual
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Individual
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Publication date
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Priority to FR9210506A priority Critical patent/FR2695213B1/en
Publication of FR2695213A1 publication Critical patent/FR2695213A1/en
Application granted granted Critical
Publication of FR2695213B1 publication Critical patent/FR2695213B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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

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

Abstract

The cathode tube uses a semi-reflecting mirror, to obtain an indirect image by reflection. The tube is enclosed in a container (1) with a top lid (1A) having the semi-reflecting mirror (3) attached pivotally. The screen assembly (2) is held by a support (2B). The semi-reflecting mirror faces the user and the screen is at a 45 deg angle to the top lid. The mirror is fixed on each side by a lateral pivot (4) to allow adjustment of the angle fo inclination of the mirror, for good alignment in viewing. The system allows lateral inversion of the image, with inversion of two wires on the lateral deflection coil of the cathode tube. USE/ADVANTAGE - E.g. microcomputer display. Shields viewer from low frequency magnetic field from deflection system, and from IR and UV radiation emitted from screen.

Description

La présente invention a pour objet à titre de produit industriel nouveau un dispositif de filtration par semiréflexion des rayonnements d'un écran de visualisation a tube cathodique. The subject of the present invention is, as a new industrial product, a device for filtering by semi-reflection of the radiation from a display screen with cathode ray tube.

Les utilisateurs d'écran de visualisation à tube cathodique sont soumis directement aux expositions des divers rayonnements et champs magnéto-électrique émis face à ces écrans. I1 en résulte pour certains des maux de tètes, des allergies, de la fatigue visuelle et nerveuse, etc... The users of cathode ray tube display screens are subjected directly to the exposures of the various radiations and magnetoelectric fields emitted in front of these screens. I1 results for some headaches, allergies, visual and nervous fatigue, etc ...

Le dispositif selon l'invention permet de remédier a cet inconvénient. I1 comporte en effet selon une première caractéristique un miroir semi-réfléchissant placé face à l'écran de visualisation a tube cathodique, dont l'alimentation de la bobine de déviation latérale a été inversé. L'image ainsi restitué est exposée face a l'utilisateur, en étant exempt en bonne partie des rayonnements infra-rouge et ultra-violet ainsi que des champs magnétiques et champs électriques naissant d'un tube cathodique. The device according to the invention overcomes this drawback. In fact, according to a first characteristic, it comprises a semi-reflecting mirror placed facing the display screen with cathode-ray tube, the supply of which of the lateral deflection coil has been reversed. The image thus restored is exposed in front of the user, being largely free from infrared and ultraviolet radiation as well as magnetic fields and electric fields arising from a cathode ray tube.

L'ensemble est fixé dans un meuble formant le bureau, dont une forme de l'invention est décrite ci-après à titre indicatif et nullement limitatif, en se référant au dessin annexé. The assembly is fixed in a piece of furniture forming the desk, a form of the invention of which is described below by way of indication and in no way limitative, with reference to the attached drawing.

- La figure 1 est la vue de coté en coupe de la
présente invention,
- la figure 2 est la vue de face de la présente
invention.- Figure 1 is the side view in section of the
present invention,
- Figure 2 is the front view of this
invention.

Le dispositif objet de la présente invention est remarquable en ce qui comporte un miroir semi-réfléchissant (3) placé face a l'utilisateur et face à l'écran a tube cathodique (2A), ce dernier est encastré dans un meuble (1). The device which is the subject of the present invention is remarkable in that it comprises a semi-reflecting mirror (3) placed facing the user and facing the screen with cathode-ray tube (2A), the latter is embedded in a cabinet (1) .

L'ensemble de l'écran (2) est soutenu par un support réglable (2B), la face de l'écran (2A) formant un angle d'environ 450, par rapport au bord inférieur du plateau (1A). L'inversion latérale de l'image est obtenue en inversant les deux fils de la bobine de déviation latérale du tube cathodique (2A). The entire screen (2) is supported by an adjustable support (2B), the face of the screen (2A) forming an angle of about 450, with respect to the lower edge of the plate (1A). The lateral inversion of the image is obtained by inverting the two wires of the lateral deflection coil of the cathode ray tube (2A).

Le miroir semi-réfléchissant (3) est utilisé sur sa face la plus réfléchissante pour éviter un phénomène de dédoublement.  The semi-reflecting mirror (3) is used on its most reflecting side to avoid a phenomenon of duplication.

L'utilisateur peut régler l'inclinaison du miroir (3) d'avant en arrière pour un bon alignement de l'image grâce au système de pivot latéral (4). The user can adjust the tilt of the mirror (3) back and forth for proper alignment of the image thanks to the lateral pivot system (4).

Le dispositif selon l'invention est particulièrement destiné aux utilisateurs d'écran de micro-informatique.  The device according to the invention is particularly intended for users of a computer screen.

Claims (8)

REVENDICATIONS 1) Dispositif de filtration par semi-réflexion des rayonnements d'un écran de visualisation a tube cathodique (2), caractérisé par l'utilisation d'un miroir semiréfléchissant (3).1) Device for filtering by semi-reflection of the radiation from a display screen with cathode ray tube (2), characterized by the use of a semi-reflecting mirror (3). 2) Dispositif selon la revendication 1 caractérisé par le fait, que ce miroir semi-réfléchissant (3) est placé face à l'utilisateur et que l'ensemble de l'écran a tube cathodique (2) est encastré dans un meuble (1) dont la face de l'écran (2A) fait un angle d'environ 450 par rapport a la base inférieur du plateau (1A). 2) Device according to claim 1 characterized in that this semi-reflecting mirror (3) is placed facing the user and that the entire screen with cathode ray tube (2) is embedded in a cabinet (1 ) whose face of the screen (2A) makes an angle of about 450 with respect to the lower base of the plate (1A). 3) Dispositif selon la revendication 2, caractérisé par le fait que le miroir (3) est fixé de chaque- coté par un système de pivot latéral (4), dans une découpe du plateau supérieur (lA). 3) Device according to claim 2, characterized in that the mirror (3) is fixed on each side by a lateral pivot system (4), in a cutout of the upper plate (lA). 4) Dispositif selon la revendication 2 permettant a l'utilisateur d'un poste de travail, de régler l'inclinaison du miroir (3) d'avant en arrière pour un bon alignement de la vision en fonction de sa taille, grâce au système dè pivot latéral (4).4) Device according to claim 2 allowing the user of a workstation, to adjust the tilt of the mirror (3) back and forth for good alignment of vision depending on its size, thanks to the system side pivot (4). 5) Dispositif selon la revendication 1 permettant d'avoir une inversion latérale de l'image, caractérise par l'inversion des deux fils de la bobine de déviation latérale du tube a écran cathodique.5) Device according to claim 1 allowing to have a lateral inversion of the image, characterized by the inversion of the two wires of the lateral deflection coil of the cathode-screen tube. 6) Dispositif selon la revendication 2, caractérisé par le fait que le miroir utilisé est du type semi-réfléchissant, dont la face la plus réfléchissante est placée face à6) Device according to claim 2, characterized in that the mirror used is of the semi-reflecting type, the most reflecting face of which is placed facing l'utilisateur pour éviter un phénomène de dédoublement. the user to avoid a phenomenon of duplication. 7) Dispositif selon la revendication 1 caractérisé par le fait que l'utilisateur est éloigné de la face de l'écran à tube cathodique et ainsi donc des effets directs, tels que les champs magnétiques a basse fréquence émis par les bobines de déviation verticale, et horizontale.7) Device according to claim 1 characterized in that the user is distant from the face of the screen with cathode ray tube and thus therefore from direct effects, such as the low frequency magnetic fields emitted by the vertical deflection coils, and horizontal. 8) Dispositif selon la revendication 6 par le fait que le miroir semi-réfléchissant laisse apparaître une image visible de bonne qualité et laisse traverser une bonne partie des rayonnements ultra-violet émis par la cathode nécessaire à l'affichage lumineux de l'écran. 8) Device according to claim 6 in that the semi-reflecting mirror reveals a visible image of good quality and lets through a good part of the ultra-violet radiation emitted by the cathode necessary for the bright display of the screen.
FR9210506A 1992-08-27 1992-08-27 Device for semi-reflection filtration of radiation from a cathode ray tube display screen. Expired - Fee Related FR2695213B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9210506A FR2695213B1 (en) 1992-08-27 1992-08-27 Device for semi-reflection filtration of radiation from a cathode ray tube display screen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9210506A FR2695213B1 (en) 1992-08-27 1992-08-27 Device for semi-reflection filtration of radiation from a cathode ray tube display screen.

Publications (2)

Publication Number Publication Date
FR2695213A1 true FR2695213A1 (en) 1994-03-04
FR2695213B1 FR2695213B1 (en) 1995-01-06

Family

ID=9433164

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9210506A Expired - Fee Related FR2695213B1 (en) 1992-08-27 1992-08-27 Device for semi-reflection filtration of radiation from a cathode ray tube display screen.

Country Status (1)

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FR (1) FR2695213B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0758141A2 (en) * 1995-08-05 1997-02-12 Central Research Laboratories Limited A radio frequency interference shield

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB930848A (en) * 1960-11-02 1963-07-10 Decca Ltd Improvements in or relating to cathode ray tube display apparatus
US4360836A (en) * 1980-03-03 1982-11-23 Judy A. Breck Apparatus for removing X-rays and other harmful radiation from visible radiation
US4668026A (en) * 1985-02-01 1987-05-26 The Laitram Corporation Computer terminal support cabinet which eliminates reflection and glare from visual displays

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB930848A (en) * 1960-11-02 1963-07-10 Decca Ltd Improvements in or relating to cathode ray tube display apparatus
US4360836A (en) * 1980-03-03 1982-11-23 Judy A. Breck Apparatus for removing X-rays and other harmful radiation from visible radiation
US4668026A (en) * 1985-02-01 1987-05-26 The Laitram Corporation Computer terminal support cabinet which eliminates reflection and glare from visual displays

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0758141A2 (en) * 1995-08-05 1997-02-12 Central Research Laboratories Limited A radio frequency interference shield
EP0758141A3 (en) * 1995-08-05 1997-03-12 Central Research Laboratories Limited A radio frequency interference shield

Also Published As

Publication number Publication date
FR2695213B1 (en) 1995-01-06

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