EP0073510B1 - Device for fastening a reflexion reducing element on the surface of a display screen - Google Patents

Device for fastening a reflexion reducing element on the surface of a display screen Download PDF

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Publication number
EP0073510B1
EP0073510B1 EP82107963A EP82107963A EP0073510B1 EP 0073510 B1 EP0073510 B1 EP 0073510B1 EP 82107963 A EP82107963 A EP 82107963A EP 82107963 A EP82107963 A EP 82107963A EP 0073510 B1 EP0073510 B1 EP 0073510B1
Authority
EP
European Patent Office
Prior art keywords
screen
front frame
arm
picture tube
diaphragm
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.)
Expired
Application number
EP82107963A
Other languages
German (de)
French (fr)
Other versions
EP0073510A3 (en
EP0073510A2 (en
Inventor
Hans Hahn
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT82107963T priority Critical patent/ATE17811T1/en
Publication of EP0073510A2 publication Critical patent/EP0073510A2/en
Publication of EP0073510A3 publication Critical patent/EP0073510A3/en
Application granted granted Critical
Publication of EP0073510B1 publication Critical patent/EP0073510B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H01J29/896—Anti-reflection means, e.g. eliminating glare due to ambient light
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/89—Optical components associated with the vessel
    • H01J2229/8913—Anti-reflection, anti-glare, viewing angle and contrast improving treatments or devices
    • H01J2229/8922—Apparatus attached to vessel and not integral therewith

Abstract

1. Apparatus for attaching a reflection-reducing means (26), which can be stretched spherically in front of a picture tube (14), in particular a micromesh filter, to the surface of a screen (20) which is arranged in a front frame (18) of a housing (12) which accommodates the picture tube (14), where, between the front frame (18) and the screen (20), a diaphragm (24) is fixed which presses the means (26) against the screen (20), characterised in that the diaphragm (24) consists of elastically deformable material and has an approximately U-shaped cross-section, a first arm (28) having an angled part (32) and the second arm (30) being rectilinear ; and that by means of the second arm (30) the diaphragm (24) presses the means (26) against the screen (20), and by means of the angled part (32) of the first arm (28), it engages on to the inside of the front frame (18).

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Befestigung eines sphärisch vor eine Bildröhre spannbaren reflexionsmindernden Mittels, insbesondere Mikro-mesh-Filters, auf der Oberfläche des Bildschirms, der in einem Frontrahmen angeordnet ist.The invention relates to a device for fastening a reflection-reducing agent, in particular a micro-mesh filter, which can be spherically clamped in front of a picture tube, on the surface of the screen, which is arranged in a front frame.

An Bildschirmarbeitsplätzen können bei nichtentspiegelten Bildschirmen durch ungünstige Lichtverhältnisse Reflexionen auftreten, die eine ermüdungsfreie und exakte Zeichenerkennung erschweren oder verhindern. Dies kann durch Streulicht aus Deckenleuchten, durch helle oder glänzende Gegenstände der Umgebung oder sonnenbestrahlte Fensterflächen verursacht werden.In the case of non-anti-reflective screens, reflections can occur at computer workstations due to unfavorable lighting conditions, which complicate or prevent fatigue-free and exact character recognition. This can be caused by scattered light from ceiling lights, by bright or shiny objects in the area or by sunlit window surfaces.

Zur Reflexionsminderung dieser oder ähnlicher Störeinflüsse auf dem Bildschirm gibt es eine Reihe technischer Verfahren wie Interferenzschichten, Entspiegelungssprays, Vorsatzscheiben mit mattierter und entspiegelter Oberfläche oder Mikro-mesh-Filter, die gerade oder sphärisch vor die Röhre gespannt sein können.There are a number of technical methods for reducing reflections of these or similar interference on the screen, such as interference layers, anti-reflective sprays, front screens with matt and anti-reflective surfaces or micro-mesh filters, which can be stretched straight or spherically in front of the tube.

Aus dem DE-GM 18 52 437 ist eine Vorrichtung zum Befestigen einer reflexionsmindernden Bespannung auf der Oberfläche eines durch eine Blende begrenzten Bildschirms bekannt. Der innere Blendenrand trägt umlaufend eine keilförmige, nutenartige Vertiefung, in welche die Bespannung eingelegt und mit einem entsprechend angepassten Rahmen eingepresst und gehalten ist. Die Bildröhre ist satt an die Bespannung anliegend montiert.From DE-GM 18 52 437 a device for attaching a reflection-reducing fabric on the surface of a screen limited by a screen is known. The inner edge of the panel has a wedge-shaped, groove-like depression all around, into which the covering is inserted and pressed and held with a correspondingly adapted frame. The picture tube is mounted snugly against the fabric.

Eine aus US-A-3 582 189 bekannte Vorrichtung enthält gleichfalls einen Frontrahmen mit angesetzter Blende, wobei die Blende, soweit erkennbar, starr ausgebildet ist. Der an der Bildröhre anliegende Teil des Frontrahmens muss daher exakt an die Form der Bildröhre angepasst sein, so dass ein Ausgleich grösserer Toleranzen oder die Angleichung an Bildröhren unterschiedlicher Abmessungen nicht möglich ist.A device known from US-A-3 582 189 also contains a front frame with an attached cover, the cover, as far as can be seen, being rigid. The part of the front frame which is in contact with the picture tube must therefore be adapted exactly to the shape of the picture tube, so that a compensation of larger tolerances or an adaptation to picture tubes of different dimensions is not possible.

Die durch US-A-3 146 305 bekannte Vorrichtung besitzt ebenfalls einen Frontrahmen, der gleichzeitig mit einem abgewinkelten Teil die Funktion einer Blende übernimmt. Ein zwischen dem Frontrahmen und der Bildröhre vorgesehener elastischer Einsatz dient zur Halterung einer starren, ebenen Scheibe vor dem Bildschirm und zur Abdichtung des Zwischenraums zwischen der Scheibe und dem Bildschirm.The device known from US-A-3 146 305 also has a front frame which simultaneously functions as an aperture with an angled part. An elastic insert provided between the front frame and the picture tube serves to hold a rigid, flat pane in front of the screen and to seal the intermediate space between the pane and the screen.

Die der Erfindung zugrundeliegende Aufgabe besteht darin, eine Vorrichtung anzugeben, mit der ein sphärisch vor eine Bildröhre spannbares reflexionsminderndes Mittel, insbesondere ein Mikro-mesh-Filter, auf der Oberfläche des Bildschirms befestigt und damit die optische Abbildungsqualität verbessert werden kann, ohne dass die Herstellkosten wesentlich erhöht werden. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.The object on which the invention is based is to provide a device with which a reflection-reducing agent, in particular a micro-mesh filter, which can be spherically clamped in front of a picture tube, is attached to the surface of the screen, and thus the optical imaging quality can be improved without the production costs be significantly increased. This object is achieved by the characterizing features of patent claim 1.

Um verschiedenartig aufgebaute Mittel auf dem Bildschirm befestigen zu können, ist es vorteilhaft, wenn der Frontrahmen, der in einem Gehäuse angeordnet ist, in dem die Bildröhre befestigt ist, vermittels von im Rahmen geführten Stellschrauben axial zur Bildröhre einstellbar ist.In order to be able to fasten differently structured means on the screen, it is advantageous if the front frame, which is arranged in a housing in which the picture tube is fastened, can be adjusted axially to the picture tube by means of adjusting screws guided in the frame.

Anhand eines Ausführungsbeispiels, das in den Figuren dargestellt ist, wird die Erfindung weiter erläutert. Es zeigen:

  • Fig. 1 eine Seitenansicht eines Datensichtgerätes,
  • Fig. 2 eine teilweise Vorderansicht und
  • Fig. 3 einen teilweisen Querschnitt durch das Datensichtgerät.
The invention is further explained on the basis of an exemplary embodiment which is illustrated in the figures. Show it:
  • 1 is a side view of a data display device,
  • Fig. 2 is a partial front view and
  • Fig. 3 shows a partial cross section through the data display device.

Figur 1 zeigt ein Datensichtgerät 10 bekannten Aufbaus in Seitenansicht. Das Datensichtgerät 10 hat ein Gehäuse 12, in dem eine Bildröhre 14 in einem Rahmen 16 befestigt ist und einen Frontrahmen 18, in dem der Bildschirm 20 der Bildröhre 14 angeordnet ist. Der Rahmen 16 und der Bildschirm 20 sind in Figur 1 gestrichelt angedeutet. Der Frontrahmen 18 hat eine etwa viereckig ausgeführte Öffnung 22, in der der Bildschirm 20 liegt. Zwischen dem Frontrahmen 18 und dem Bildschirm 20 ist eine Blende 24 angeordnet, die den Zwischenraum zwischen Bildschirm 20 und Frontrahmen 18 abdeckt.Figure 1 shows a data display device 10 of known construction in side view. The data display device 10 has a housing 12 in which a picture tube 14 is fastened in a frame 16 and a front frame 18 in which the screen 20 of the picture tube 14 is arranged. The frame 16 and the screen 20 are indicated by dashed lines in FIG. 1. The front frame 18 has an approximately square opening 22 in which the screen 20 is located. An aperture 24 is arranged between the front frame 18 and the screen 20 and covers the space between the screen 20 and the front frame 18.

Die Blende 24 wird nun dazu benutzt, um ein reflexionsminderndes Mittel über den Bildschirm 20 zu spannen. Ein solches reflexionsminderndes Mittel ist z.B. ein optisches Filter, z.B. ein Mikro-mesh-Filter bekannten Aufbaus. Die Einspannung eines reflexionsmindernden Mittels 26 ist in Figur 3 gezeigt. Dazu wird das reflexionsmindernde Mittel 26 über den Bildschirm 20 gelegt und anschliessend mit Hilfe der Blende 24 verspannt. Die Blende 24 ist als elastisch verformbares Teil aufgebaut und hat einen etwa U-förmigen Querschnitt. Der eine Schenkel 28 weist ein abgewinkeltes Teil 32 auf, während der andere Schenkel 30 gerade verläuft.The aperture 24 is now used to stretch a reflection-reducing agent over the screen 20. Such an anti-reflection agent is e.g. an optical filter, e.g. a micro-mesh filter of known construction. The clamping of a reflection-reducing agent 26 is shown in FIG. 3. For this purpose, the reflection-reducing means 26 is placed over the screen 20 and then clamped with the aid of the screen 24. The aperture 24 is constructed as an elastically deformable part and has an approximately U-shaped cross section. One leg 28 has an angled part 32, while the other leg 30 is straight.

Zur Befestigung des reflexionsmindernden Mittels 26 wird mit Hilfe des Schenkels 30 das Mittel 26 gegen den Bildschirm 20 gedrückt, anschliessend wird der andere Schenkel 28 mit seinem abgewinkelten Teil 32 an der Innenseite des Frontrahmens 18 eingerastet.To fasten the reflection-reducing means 26, the means 26 is pressed against the screen 20 with the help of the leg 30, and then the other leg 28 is snapped into place with its angled part 32 on the inside of the front frame 18.

Soll das reflexionsmindernde Mittel 26 wieder entfernt werden, dann wird die elastisch verformbare Blende 24 wieder aus der Verspannung gelöst und das Mittel 26 kann abgenommen werden.If the reflection-reducing means 26 are to be removed again, the elastically deformable diaphragm 24 is released again from the tension and the means 26 can be removed.

Die Spannung, unter der die Blende 24 steht, kann mit Hilfe von Verstellschrauben 34 eingestellt werden. Diese Stellschrauben 34 sind im Rahmen 16 des Gehäuses 12 geführt und im Frontrahmen 18 befestigt. Mit Hilfe der Stellschrauben 34 kann der Frontrahmen 18 in axialer Richtung der Bildröhre 14 zum Gehäuse 12 verschoben werden. Zweckmässigerweise werden dazu 4 in den Ecken des Datensichtgerätes angeordnete Stellschrauben verwendet. Die Verwendung der Stellschrauben 34 hat weiterhin den Vorteil, dass reflexionsmindernde Mittel verschiedener Dicke auf dem Bildschirm 20 befestigt werden können. Der richtige Abstand zwischen dem Frontrahmen 18 und der Oberfläche des Bildschirmes 20 kann dann immer mit Hilfe der Stellschrauben 34 eingestellt werden.The voltage under which the diaphragm 24 is located can be adjusted with the aid of adjusting screws 34. These set screws 34 are guided in the frame 16 of the housing 12 and fastened in the front frame 18. With the help of the set screws 34, the front frame 18 can be moved in the axial direction of the picture tube 14 to the housing 12. For this purpose, 4 set screws arranged in the corners of the data display device are expediently used. The use of the set screws 34 also has the advantage that reflection-reducing means of different thicknesses can be attached to the screen 20. The correct distance between the front frame 18 and the surface of the image screen 20 can then always be adjusted with the help of the set screws 34.

Die Erfindung hat somit den Vorteil, dass nicht nur die Befestigung des reflexionsmindernden Mittels auf der Oberfläche des Bildschirmes auf einfache Weise geschieht, sondern erlaubt zusätzlich ein einfaches Austauschen der reflexionsmindernden Mittel auf der Oberfläche des Bildschirmes.The invention thus has the advantage that not only is the reflection-reducing agent attached to the surface of the screen in a simple manner, but also allows simple replacement of the reflection-reducing agent on the surface of the screen.

Claims (2)

1. Apparatus for attaching a reflection-reducing means (26), which can be stretched spherically in front of a picture tube (14), in particular a micromesh filter, to the surface of a screen (20) which is arranged in a front frame (18) of a housing (12) which accommodates the picture tube (14), where, between the front frame (18) and the screen (20), a diaphragm (24) is fixed which presses the means (26) against the screen (20), characterised in that the diaphragm (24) consists of elastically deformable material and has an approximately U-shaped cross-section, a first arm (28) having an angled part (32) and the second arm (30) being rectilinear; and that by means of the second arm (30) the diaphragm (24) presses the means (26) angainst the screen (20), and by means of the angled part (32) of the first arm (28), it engages on to the inside of the front frame (18).
2. A device as claimed in Claim 1, characterised in that the front frame (18) can be adjusted axially in relation to the picture tube (14) with the aid of adjusting screws (34) which are guided in the housing (12).
EP82107963A 1981-09-01 1982-08-30 Device for fastening a reflexion reducing element on the surface of a display screen Expired EP0073510B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107963T ATE17811T1 (en) 1981-09-01 1982-08-30 DEVICE FOR FIXING AN ANTI-REFLECTIVITY MEANS ON THE SURFACE OF A SCREEN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3134485 1981-09-01
DE3134485A DE3134485C2 (en) 1981-09-01 1981-09-01 Device for attaching an anti-reflective agent to the surface of a screen.

Publications (3)

Publication Number Publication Date
EP0073510A2 EP0073510A2 (en) 1983-03-09
EP0073510A3 EP0073510A3 (en) 1984-01-11
EP0073510B1 true EP0073510B1 (en) 1986-01-29

Family

ID=6140544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107963A Expired EP0073510B1 (en) 1981-09-01 1982-08-30 Device for fastening a reflexion reducing element on the surface of a display screen

Country Status (3)

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EP (1) EP0073510B1 (en)
AT (1) ATE17811T1 (en)
DE (1) DE3134485C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8901259U1 (en) * 1988-11-28 1989-10-19 Gardex Ag, St Gallen, Ch

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1852437U (en) * 1960-10-07 1962-05-30 Julius Neubauer ELASTIC IMPLOSION PROTECTION FOR TELEVISION TUBES.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1133751B (en) * 1961-02-23 1962-07-26 Loewe Opta Ag Security device for televisions
DE1159012B (en) * 1961-03-10 1963-12-12 Telefunken Patent Bracket for the protective screen of the picture tube in a television receiver
US3146305A (en) * 1961-12-14 1964-08-25 Motorola Inc Cathode ray tube protective front panel device
DE1196701B (en) * 1962-08-23 1965-07-15 Telefunken Patent Device for holding the picture tube in the housing of a television receiver
US3582189A (en) * 1968-08-19 1971-06-01 Zenith Radio Corp Ambient light filter for a television receiver
DE2712321A1 (en) * 1977-03-21 1978-09-28 Siemens Ag Industrial closed circuit TV screen - has fine meshed net of dark thread covering front to reduce light reflections
US4253737A (en) * 1979-02-12 1981-03-03 Sun-Flex Company Anti-Glare device for a computer terminal display tube

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1852437U (en) * 1960-10-07 1962-05-30 Julius Neubauer ELASTIC IMPLOSION PROTECTION FOR TELEVISION TUBES.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8901259U1 (en) * 1988-11-28 1989-10-19 Gardex Ag, St Gallen, Ch

Also Published As

Publication number Publication date
EP0073510A3 (en) 1984-01-11
DE3134485A1 (en) 1983-04-07
DE3134485C2 (en) 1983-07-14
EP0073510A2 (en) 1983-03-09
ATE17811T1 (en) 1986-02-15

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