CA2099428A1 - Protective screen for a visual display unit - Google Patents
Protective screen for a visual display unitInfo
- Publication number
- CA2099428A1 CA2099428A1 CA 2099428 CA2099428A CA2099428A1 CA 2099428 A1 CA2099428 A1 CA 2099428A1 CA 2099428 CA2099428 CA 2099428 CA 2099428 A CA2099428 A CA 2099428A CA 2099428 A1 CA2099428 A1 CA 2099428A1
- Authority
- CA
- Canada
- Prior art keywords
- protective screen
- display unit
- visual display
- screen according
- half shell
- 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.)
- Abandoned
Links
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
-
- 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
- H01J2229/8905—Direction sensitive devices for controlled viewing angle
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Optical Elements Other Than Lenses (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Abstract of the Disclosure A protective screen for a visual display unit (11) has a plate (13) which prevents viewing by persons other than those directly in front of the visual display unit.
The plate (13) is fixed in a frame (12) to be positioned in front of the visual display unit (11) by means of tabs of adhesive velcro (27) having a first part (28) which can be fixed to the frame (12) and the second part (29) which can be fixed to the visual display unit (11). The plate (13) comprises a louvre-type film (18) which defines parallel microwindows (22) in order to define a limited viewing angle (23).
The plate (13) is fixed in a frame (12) to be positioned in front of the visual display unit (11) by means of tabs of adhesive velcro (27) having a first part (28) which can be fixed to the frame (12) and the second part (29) which can be fixed to the visual display unit (11). The plate (13) comprises a louvre-type film (18) which defines parallel microwindows (22) in order to define a limited viewing angle (23).
Description
` 2~99428 Protective Screen For A Visual DisplaY Unit Field of the Invention This invention relates to a protective screen for a visual display unit comprising a transparent plate, a supporting frame for the plate and fixing means for fixing the supporting frame to the body of the visual display~unit.
Background of the Inventlon A screen of the type defined hereinabove is known, in which the frame can be positioned so as to position the screen adjacent to the visual display unit. This screen protects the user from the glare caused by external light sources. For reasons of confidentiality, it is sometimes necessary to prevent viewing by persons other than those directly in front of the visual display unit.
Summarv of the Invention Preferred embodiments of the invention provide a protective screen which alIows for viewing of the surface of the visual display unit over only a relatively limited angle while preventing viewing by persons outside this angle and which at the same time can be fixed in a simple manner to the body of the visual display unit.
The screen according to the present invention is characterised in that the plate comprises a louvre-type film known per se which defines parallel microwindows in order to-define a limited viewing angle and in which the fixing means comprise a first part which can be fixed to the frame and a second part which can be separated from the first part and can be fixed to the visual display unit.
Brief DescriPtion of the Drawinqs This and other features of the model are described in the following embodiment given by way of non-limiting example with reference to the accompanying drawings, in which.
Figure 1 is a front view of a screen embodying the invention in the porition of use;
Figure 2 is a partial longitudinal section of the screen of Figure 1 on a different scale;
Figure 3 is a partial longitudinal section of a detail from Figure 2 on a different scale, and Figure g is a front view of a container for housing the screen of Figure 1 on a different scale.
Detailed DescriPtion of Preferred Embodiments Referring to Figures 1, 2 and 3, a protective screen is designated in general by the reference numeral 6 and is applied to a portable computer 7 of known type which is shown by dash-dotted lines in the drawings and comprises a body 8, a cover 9 and a visual display unit 11 housed in the cover 9.
In this embodiment the screen 6 comprises a supporting frame 12 for a transparent plate 13. The supporting frame 12 comprises a front half shell 14 having a seat 16 provided over the entire edge of the front half shell 14, and a rear half shell 17. A plate 13 has a thickness of approximately 1 mm and comprises an intermediate louvre film 18 of slats of black silicone rubber 25 which form the walls of parallel microwindows 22 of very fine layers of transparent silicone rubber. The film 18 is inserted between two outer plates 19 and 21 of polycarbonate. The combination of the black silicone rubber, the transparent silicone rubber and the thickness of the intermediate film 18 creates a row of microwindows or passages 22 so as to define a viewing angle 23 which varies considerably as a funct~ion of the variation in the thickness of the intermediate film 18.~ The thickness of the film 18 is approximately 60~. She outer plate 21 has its respective outer sur$ace:treated so:that the coefficient of reflection:is minimal. The plate 13 with the frame~12 is rectangular, the base being greater than the;height, and has dimensions corresponding to those of the visual display unit 11. The dlrectlon of the slats 25 ls lncllned by approxlmately 13 wlth respect to a dlrection perpendicular to that of the base, although the inclination can vary from 1 to 30. ` ` : ~
The plate 13 is positioned in the seat 16 and is locked to the rear half shell 17 which is positioned against the front half shell 14 and the two half shells 14 and 17 are thus rigidly welded together by means of ultrasonic welding so as to form one piece with the plate 13.
:
The rear half shell 17 is provided on its two lateral edges wlth two houslngs 24 positioned in the vicinity of the upper edge of the half shell 17. In an analoguous manner, the front half shell 14 is provlded on lts two lateral edges wlth two toothed proJectlons 26. The fixlng means 27 comprlse two tables of adhesive velcro 28 each having a first element 28 which is positioned and fixed by means of adhesive in the respective housing 24 of the rear half shell 17 and a second element 29 which is positioned and fixed by means of adhesive on the inner part of the cover 9 adjacent to the visual display unit ll, so that the base of the plate 13 is parallel to the base:of the said visual display unit 11.
The protective screen 6 is mounted on a portable computer 7 in the following msnner. The screen 6 is positioned with the two - 3 _ .
.
- , . ... ~. :.. -. . ...
Background of the Inventlon A screen of the type defined hereinabove is known, in which the frame can be positioned so as to position the screen adjacent to the visual display unit. This screen protects the user from the glare caused by external light sources. For reasons of confidentiality, it is sometimes necessary to prevent viewing by persons other than those directly in front of the visual display unit.
Summarv of the Invention Preferred embodiments of the invention provide a protective screen which alIows for viewing of the surface of the visual display unit over only a relatively limited angle while preventing viewing by persons outside this angle and which at the same time can be fixed in a simple manner to the body of the visual display unit.
The screen according to the present invention is characterised in that the plate comprises a louvre-type film known per se which defines parallel microwindows in order to-define a limited viewing angle and in which the fixing means comprise a first part which can be fixed to the frame and a second part which can be separated from the first part and can be fixed to the visual display unit.
Brief DescriPtion of the Drawinqs This and other features of the model are described in the following embodiment given by way of non-limiting example with reference to the accompanying drawings, in which.
Figure 1 is a front view of a screen embodying the invention in the porition of use;
Figure 2 is a partial longitudinal section of the screen of Figure 1 on a different scale;
Figure 3 is a partial longitudinal section of a detail from Figure 2 on a different scale, and Figure g is a front view of a container for housing the screen of Figure 1 on a different scale.
Detailed DescriPtion of Preferred Embodiments Referring to Figures 1, 2 and 3, a protective screen is designated in general by the reference numeral 6 and is applied to a portable computer 7 of known type which is shown by dash-dotted lines in the drawings and comprises a body 8, a cover 9 and a visual display unit 11 housed in the cover 9.
In this embodiment the screen 6 comprises a supporting frame 12 for a transparent plate 13. The supporting frame 12 comprises a front half shell 14 having a seat 16 provided over the entire edge of the front half shell 14, and a rear half shell 17. A plate 13 has a thickness of approximately 1 mm and comprises an intermediate louvre film 18 of slats of black silicone rubber 25 which form the walls of parallel microwindows 22 of very fine layers of transparent silicone rubber. The film 18 is inserted between two outer plates 19 and 21 of polycarbonate. The combination of the black silicone rubber, the transparent silicone rubber and the thickness of the intermediate film 18 creates a row of microwindows or passages 22 so as to define a viewing angle 23 which varies considerably as a funct~ion of the variation in the thickness of the intermediate film 18.~ The thickness of the film 18 is approximately 60~. She outer plate 21 has its respective outer sur$ace:treated so:that the coefficient of reflection:is minimal. The plate 13 with the frame~12 is rectangular, the base being greater than the;height, and has dimensions corresponding to those of the visual display unit 11. The dlrectlon of the slats 25 ls lncllned by approxlmately 13 wlth respect to a dlrection perpendicular to that of the base, although the inclination can vary from 1 to 30. ` ` : ~
The plate 13 is positioned in the seat 16 and is locked to the rear half shell 17 which is positioned against the front half shell 14 and the two half shells 14 and 17 are thus rigidly welded together by means of ultrasonic welding so as to form one piece with the plate 13.
:
The rear half shell 17 is provided on its two lateral edges wlth two houslngs 24 positioned in the vicinity of the upper edge of the half shell 17. In an analoguous manner, the front half shell 14 is provlded on lts two lateral edges wlth two toothed proJectlons 26. The fixlng means 27 comprlse two tables of adhesive velcro 28 each having a first element 28 which is positioned and fixed by means of adhesive in the respective housing 24 of the rear half shell 17 and a second element 29 which is positioned and fixed by means of adhesive on the inner part of the cover 9 adjacent to the visual display unit ll, so that the base of the plate 13 is parallel to the base:of the said visual display unit 11.
The protective screen 6 is mounted on a portable computer 7 in the following msnner. The screen 6 is positioned with the two - 3 _ .
.
- , . ... ~. :.. -. . ...
2 0 g 9 4 2 8 first elements 28 registering with the two second element 29 and the pressure is applied to the two toothed projections 26 on the front half shell 19 untii the~elements 28 and 29 are gripped to each other. The screen 6 is thus positioned with the plate 13 in front of the visual display unit 11.
In order to remove the screen 6 from the portable computer 7, the screen 6 is lifted by means of the lower part of the half shell 14 until the elements 28 and 29 of the velcro 27 are freed therefrom.
The protective screen 6 described hltherto and used in the non-limiting example on a portable computer 7 allows for confidential viewing of the visual~ display unit 11 by only the operator over an angle of 60', the angle being~variable between 30' and 90'. It ls thus clear that the operator can operate in any area, such as office, aeroplane, train, etc.
with complete confidentiality. Moreover, the protective screen 6 can be applied to any visual dislay unit of large or small dimensions, thereby allowing for confidential viewing.
The inclination of the slats 25 between 1' and 30' moreover prevents the formation of interference fringes on the visual display unit 11.
Once the screen 6 has been removed from the portable computer 7 it can be placed ln a container or case 31 (Fig. 4) of nylon fabric having a lower part 32 and an upper part 33. The lower part 32 comprises a central pocket 34 adapted to house the protective screen 6, shown by dash-dotted lines, and two side pockets 36 and 37 of small dimensions to house, e.g. two floppy discs 38, shown by dash-dotted lines, or any other components for use of the portable computer 7. The upper part 33 can be folded along the line 39 in order to engage with a strip of velcro 41 of the lower part 32 in order to keep the container 31 closed. The inner surface of the upper part 33 is rough and moreover has advantageously been . . ~ .. .- - - . .
stiffened in order to be used as a face for the use of the mouse.
_ 5 _ .
~ ~ ' . , .
In order to remove the screen 6 from the portable computer 7, the screen 6 is lifted by means of the lower part of the half shell 14 until the elements 28 and 29 of the velcro 27 are freed therefrom.
The protective screen 6 described hltherto and used in the non-limiting example on a portable computer 7 allows for confidential viewing of the visual~ display unit 11 by only the operator over an angle of 60', the angle being~variable between 30' and 90'. It ls thus clear that the operator can operate in any area, such as office, aeroplane, train, etc.
with complete confidentiality. Moreover, the protective screen 6 can be applied to any visual dislay unit of large or small dimensions, thereby allowing for confidential viewing.
The inclination of the slats 25 between 1' and 30' moreover prevents the formation of interference fringes on the visual display unit 11.
Once the screen 6 has been removed from the portable computer 7 it can be placed ln a container or case 31 (Fig. 4) of nylon fabric having a lower part 32 and an upper part 33. The lower part 32 comprises a central pocket 34 adapted to house the protective screen 6, shown by dash-dotted lines, and two side pockets 36 and 37 of small dimensions to house, e.g. two floppy discs 38, shown by dash-dotted lines, or any other components for use of the portable computer 7. The upper part 33 can be folded along the line 39 in order to engage with a strip of velcro 41 of the lower part 32 in order to keep the container 31 closed. The inner surface of the upper part 33 is rough and moreover has advantageously been . . ~ .. .- - - . .
stiffened in order to be used as a face for the use of the mouse.
_ 5 _ .
~ ~ ' . , .
Claims (11)
1. A protective screen for a visual display unit comprising:
a transparent plate;
a frame supporting said plate and fixing means for fixing said frame to said visual display unit;
wherein said plate comprises a louvre-type film which defines parallel microwindows in order to define a limited viewing angle, and wherein said fixing means comprise a first part which can be fixed to said frame and a second part which can be separated from said first part and can be fixed to said visual display unit.
a transparent plate;
a frame supporting said plate and fixing means for fixing said frame to said visual display unit;
wherein said plate comprises a louvre-type film which defines parallel microwindows in order to define a limited viewing angle, and wherein said fixing means comprise a first part which can be fixed to said frame and a second part which can be separated from said first part and can be fixed to said visual display unit.
2. A protective screen according to claim 1, wherein said viewing angle varies as a function of variation in thickness of said film.
3. A protective screen according to claim 1 wherein said viewing angle is approximately 60° and said thickness of said film is approximately 1 mm.
4. A protective screen according to claim l wherein said plate within said frame is rectangular, having a base dimension greater than height and has dimensions corresponding to those of said visual display unit and the direction of slats in said film is inclined by approximately 13° with respect to a direction perpendicular to said base.
5. A protective screen according to claim 9, wherein said film is inserted between two outer plates and said two outer plates have surfaces treated so that their coefficient of reflection is minimal.
6. A protective screen according to claim 1 wherein said frame has a front half shell having a seat provided over an entire edge of the said half shell and two toothed projections projecting from an edge opposite the seat and positioned on two lateral edges in the vicinity of an upper edge.
7. A protective screen according to claim 6 wherein said frame comprises a rear half shell which can be rigidly fixed to said front half shell in order to hold said plate in said seat of said front half shell and said rear half shell comprises two housings on said lateral edges opposite said seat in order to house said first part of said fixing means.
8. A protective screen according to claim 7, wherein said toothed projections are opposite said two housings.
9. A protective screen according to claim 7, wherein said fixing means comprise tabs of adhesive velcro and said first parts are fixed by means of adhesive in said two housing of said rear half shell and said second parts are fixed by means of adhesive on to said body adjacent to said visual display unit, so that said base of said plate is parallel to a base of said visual display unit.
10. A protective screen according to claim 1 wherein when said screen is not in use it is placed in a fabric container comprising a lower part having a central pocket adapted to house said screen and two side pockets superimposed upon said central pocket and of small dimensions in order to house floppy discs or elements that can be used by a computer.
11. A protective screen according to claim 10, wherein said container comprises an upper part which is connected to said lower part and can be folded over in order to engage with a fixing element formed by a strip of velcro on said lower part in order to keep said container closed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000238 IT227651Y1 (en) | 1992-10-01 | 1992-10-01 | DISPLAY SCREEN FOR DISPLAY. |
| ITTO92U000238 | 1992-10-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2099428A1 true CA2099428A1 (en) | 1994-04-11 |
Family
ID=11410252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2099428 Abandoned CA2099428A1 (en) | 1992-10-01 | 1993-06-30 | Protective screen for a visual display unit |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0599451A1 (en) |
| JP (1) | JPH06194506A (en) |
| CA (1) | CA2099428A1 (en) |
| IT (1) | IT227651Y1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6412889B1 (en) | 2000-03-29 | 2002-07-02 | Stomp, Inc. | Organizer for computer monitor |
| JP2002303707A (en) * | 2001-02-02 | 2002-10-18 | Three M Innovative Properties Co | Optical filter and filter for touch panel type display |
| JP2004029673A (en) * | 2002-06-28 | 2004-01-29 | Three M Innovative Properties Co | Optical filter, display unit and touch panel unit |
| GB2461907A (en) | 2008-07-17 | 2010-01-20 | Sharp Kk | Angularly restricted display |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4427264A (en) * | 1981-01-12 | 1984-01-24 | Optical Coating Laboratory, Inc. | Mounting for optical antiglare panel and assembly including the same |
| US4663562A (en) * | 1984-07-16 | 1987-05-05 | General Electric Company | Contrast enhancement structure for color cathode ray tube |
| JPH0535361Y2 (en) * | 1986-09-25 | 1993-09-08 | ||
| US4812709A (en) * | 1987-05-29 | 1989-03-14 | Transaction Technology Inc. | Privacy screen for a color cathode ray display tube |
-
1992
- 1992-10-01 IT IT000238 patent/IT227651Y1/en active IP Right Grant
-
1993
- 1993-06-30 CA CA 2099428 patent/CA2099428A1/en not_active Abandoned
- 1993-08-20 JP JP20642193A patent/JPH06194506A/en not_active Withdrawn
- 1993-09-03 EP EP93306970A patent/EP0599451A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06194506A (en) | 1994-07-15 |
| ITTO920238V0 (en) | 1992-10-01 |
| ITTO920238U1 (en) | 1994-04-01 |
| EP0599451A1 (en) | 1994-06-01 |
| IT227651Y1 (en) | 1997-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |