GB2316216A - Illuminated displays - Google Patents

Illuminated displays Download PDF

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Publication number
GB2316216A
GB2316216A GB9616480A GB9616480A GB2316216A GB 2316216 A GB2316216 A GB 2316216A GB 9616480 A GB9616480 A GB 9616480A GB 9616480 A GB9616480 A GB 9616480A GB 2316216 A GB2316216 A GB 2316216A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
image
display panel
illuminated display
panel according
sheet
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.)
Granted
Application number
GB9616480A
Other versions
GB2316216B (en )
GB9616480D0 (en )
Inventor
Morton Graham
Original Assignee
Morton Graham
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

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068Arrangements of plural sources, e.g. multi-colour light sources
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0058Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/006Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like

Abstract

An illuminated display panel of the kind used in the sign industry for advertising or direction indication or in gaming machines, control panels and the like and intended to illuminate an image provided on the panel simultaneously by edge lighting and back lighting. Consists of several superimposed layered components including a transparent front sheet (12) having an image (A) disposed at the rear face thereof, a masking sheet (18) which behind those areas of the sheet (12) not occupied by the image (A) is opaque thus to conceal the components of a printed circuit board (19) supplying an array of LEDs (20) which are arranged behind the image to illuminate same by back lighting. The entire panel is surrounded by frame members (11) to form an enclosed unit housing a cold cathode fluorescent tubular lamp (23) having a diameter no greater than the thickness of the front sheet (12). A back sheet (21) protects the rear face of the panel and electrical supply means are housed in a free space (26) within the frame (11). The image (A) may be continuously illuminated with edge lighting and periodically illuminated with back lighting.

Description

<RTI>llLUMINAThD</RTI> DISPLAYS THIS INVENTION relates to illuminated display panels of a kind used in the sign industry for advertising or direction indication and for such other applications as gaming machines, control panels and the like and particularly concerns the provision within such a panel for dual illumination of selected parts thereof.

Such panels often include back-lit or edge-lit transparent zones. Conventionally it has not been possible to illuminate a single such zone by two different light sources simultaneously and it has been necessary, for example where animation is to be simulated, to divide the panel into several different compartments separated from neighbouring compartments and illuminated individually according to the required sequence. To illuminate a particular zone simultaneously with two light sources has thus not been possible and so manufacturers of, for example, gaming machines have been forced to produce illuminated panels backlit in specific areas of the panel requiring separate back light sources for each compartmented zone each lit exclusively by one light source.

Edge-lit panels require that the light emitted by a lamp disposed at one edge of the panel is free to travel throughout the panel unobstructed.

According to the present invention the aforementioned difficulty is overcome in an illuminated display panel comprising a transparent sheet having front and rear surfaces respectively, a translucent image disposed at least at one surface thereof, a first light source adjacent at least one edge of the sheet to illuminate the image by edge-lighting, and a second light source located behind the image to illuminate same by back-lighting.

Preferably, the second light source is an electronic (LED or LCD) device or a fluorescent lamp or an electroluminescent lamp, mounted on a circuit board, the latter being rendered invisible from the front surface of the transparent sheet.

An embodiment of the invention will now be described, by way of example only, with reference to the accompanying schematic drawings, in which: Fig. 1 is a front elevation of a complete illuminated display panel made in accordance with the invention, and for the sake of example having an image in the form of a letter A; Fig. 2 is a similar elevation of a component of the panel; and Fig. 3 is a partial cross-section taken on line <RTI>Il-ll</RTI> of Fig.

1.

An illuminated display panel made in accordance with the invention comprises a panel 10 consisting, as will be described, of several superimposed layered components surrounded by a supporting frame 11.

Referring now to Fig. 3, the components making up the panel include a transparent acrylic or polycarbonate sheet 12 having a thickness in the region of 6mm. Arrow 13 indicates the direction in which the panel will be viewed and so it has a front surface 14 and a rear surface 15.

It is intended, for example, that the image of the letter A shall be continuously illuminated with edge lighting and periodically illuminated with back lighting, as will be described.

Thus, the image is provided on the back surface 15 of the sheet 12 by, for example, acrylic ink or self-adhesive coloured film. Alternatively the image can be placed directly against either of the surfaces 14 and 15 on a separate laminated sheet or by paper or by whatever material will provide the image in immediate face-toface contact with the surface 14 or 15, preferably with no air space inbetween, and whatever medium is used it should be translucent or partially transparent.

The part 16 of the rear surface 15 which is not occupied by the required image A may be mirrored or otherwise coloured as indicated at 17. If required, this effect may be by a coating on a further acrylic sheet 18 of some 3mm in thickness forming the next consecutive layer behind the acrylic sheet 12. Located behind the masking sheet 18 is a printed circuit board 19 on which are mounted a plurality of LEDs 20 each located where required behind the image A thus, when illuminated, to be visible through the image i.e. by back lighting. Finally, a backing sheet 21 for example of acrylic or foamed plastics is provided to protect the rear face of the printed circuit board 19.

Layers 18, 19 and 21 are assembled into a sealed unit by means of self-adhesive tape 22 which, along three sides of the panel also extends across the edge of sheet 12. Adjacent the one exposed edge of the latter there is supported a fluorescent tubular lamp 23 of some 4mm in diameter which is supported by a member 24 for example of foamed plastics, within a parabolic reflector 25.

The frame 11 consists of four lengths of channel sectioned aluminium or the like attached to the assembly preferably by bonding to form a sealed connection therewith, and corner pieces 27 are applied to close the ends of the individual framing members 11. A space 26 remaining within the frame, alongside the lamp 23 along one edge, may be used to house the starting ballast for the fluorescent tube and any other wiring or suspension component for the panel. Any remaining free space may be filled with supporting blocks of, for example, acrylic or polystyrene.

In operation, the front sheet 12 is edge-lit by lamp 23 to provide, if required, continuous illumination of the image A.

Simultaneously or occasionally, as required, the LED's 20 may be illuminated to provide supplementary back-lighting which without extinguishing the edge light is thus superimposed thereon to provide dual illumination. For example, it may be required to have the LED's illuminated intermittently in a flashing mode or individually in sequence to provide a so-called "chasing light", or for the purpose of enhancing or drawing attention to the illuminated image on the panel.

The animation or motion sequence of the supplementary electronic back-light may be used, for example, in a gaming machine to depict progress as part of the game.

It will be appreciated that by locating the back-lighting behind the image but with all other parts of the back light system concealed by the surrounding mask 18, simultaneous edge lighting and back-lighting, or dual illumination, is achieved.

If the masking layer 17 occupying the area 16 is provided as a mirrored or other opaque coating on the rear surface 15 of the sheet 12, the masking layer 18 may be omitted.

The overall thickness of an illuminated panel made in accordance with the invention may be 25mm or less and the width of the frame 11 in the plane of the panel is typically 12.5mm.

Edge lighting is provided by one or more 4mm-diameter cold cathode lamps requiring very little space at the edge of the panel and easily housed within the frame 11.

The image A may be other than printed or bonded to the rear surface 15 of sheet 12 and may, alternatively, be provided on the front face 14 although, for cleaning the panel and to prevent the image from being damaged, it is preferably located on the rear face.

Alternatively or in addition to surface coating, the image may be engraved preferably in the rear surface 15.

If required, secondary back-lighting behind the front sheet 12 may be provided in parts not occupied by the image A and such areas can be made visible by apertures of predetermined shape and size within the masking layer 17. An alternative or addition to the secondary back-lighting may be provided by units providing electroluminescence.

It is not intended to limit the invention to the details described herein. For example, the edge lighting may be provided by a fluorescent tube or tubes having a different diameter from that indicated herein. Furthermore, frame members may be omitted from any of the edges of the panel, particularly those not occupied by a lamp or electrical or electronic apparatus.

Claims (14)

1. An illuminated display panel comprising a transparent sheet having front and rear surfaces respectively, a translucent image disposed at least at one surface thereof and visible through the sheet, a first light source adjacent at least one edge of the sheet to illuminate the image by edge lighting, and a second light source located behind the image to enable simultaneous illumination by back lighting.
2. An illuminated display panel according to Claim 1, wherein the second light source is part of a back light system all other parts of which are invisible from the front surface of the transparent sheet.
3. An illuminated display panel according to Claim 1 or Claim 2, wherein the second light source is an electronic (LED or LCD) device.
4. An illuminated display panel according to any one of Claims 1 to 3, consisting of several superimposed layered components surrounded by a supporting frame.
5. An illuminated display panel according to any preceding claim, wherein the translucent image is provided in the form of an acrylic ink or self-adhesive coloured film arranged in immediate faceto-face contact with one surface of the transparent sheet with no air space in between.
6. An illuminated display panel according to Claim 5, wherein parts of said one surface not occupied by said translucent image are rendered opaque such that any part of the second light surce not located behind the image is invisible from the front surface of the transparent sheet.
7. An illuminated display panel according to any preceding claim, including a further sheet of material disposed behind the transparent sheet and, in those areas not superimposed by the translucent image, the further sheet is rendered opaque whereby any part of the second light source not located behind the image is invisible from the front surface of the transparent sheet.
8. An illuminated display panel according to any preceding claim, wherein the second light source comprises an array of LEDs located in spaced relationship each behind the translucent image thus, when illuminated, to be visible through the image by back lighting.
9. An illuminated display panel according to any preceding claim, wherein the first light source is at least one cold cathode fluorescent tubular lamp laid along one edge of the transparent sheet and having a diameter no greater than the thickness of the transparent sheet.
10. An illuminated display panel according to Claim 4, wherein at least some of the several superimposed layered components are assembled into a sealed unit by tape applied around the peripheral edges thereof except in one edge region where the first light source is located.
11. An illuminated display panel according to any preceding claim, including a frame of channel sectioned material mounted on and extending around at least a part of the peripheral edge region of the panel to enclose same, there being at least one free space within the channel section in which there is housed an electrical supply system for the first and second light sources.
12. An illuminated display panel according to any preceding claim, wherein the second light source includes an array of LEDs and means to illuminate them intermittently in a flashing or sequential mode thus to create apparent animation or a motion sequence.
13. An illuminated display panel according to Claim 9, wherein the transparent sheet is at or in the region of 6mm in thickness and wherein the cold cathode fluorescent tubular lamp has a diameter at or in the region of 4mm.
14. An illuminated display panel according to any preceding claim, wherein at least a part of the translucent image is engraved in the rear surface of the transparent sheet.
GB9616480A 1996-08-06 1996-08-06 Illuminated displays Expired - Fee Related GB2316216B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9616480A GB2316216B (en) 1996-08-06 1996-08-06 Illuminated displays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9616480A GB2316216B (en) 1996-08-06 1996-08-06 Illuminated displays

Publications (3)

Publication Number Publication Date
GB9616480D0 GB9616480D0 (en) 1996-09-25
GB2316216A true true GB2316216A (en) 1998-02-18
GB2316216B GB2316216B (en) 2000-09-06

Family

ID=10798081

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9616480A Expired - Fee Related GB2316216B (en) 1996-08-06 1996-08-06 Illuminated displays

Country Status (1)

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GB (1) GB2316216B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972475A3 (en) * 1998-07-06 2001-09-26 Becker &amp; Hach GmbH &amp; Co.KG Illuminated picture holder
GB2362022A (en) * 2000-03-16 2001-11-07 Beverley Mildred Graham Double skinned illuminated sign
GB2386460A (en) * 2002-01-22 2003-09-17 James Males Portable illuminated sign
EP1346823A1 (en) * 2002-03-17 2003-09-24 Döppner Bauelemente GmbH &amp; Co. KG Transparent element, in particular laminated glazing
WO2004106056A1 (en) * 2003-05-28 2004-12-09 Döppner Bauelemente GmbH & Co. KG Method and device for producing composite elements, and resulting composite element
WO2005071641A2 (en) * 2004-01-27 2005-08-04 Giancarlo Miani Slim-line luminous sign
US7014563B2 (en) * 2001-09-28 2006-03-21 Innovative Gaming Corporation Of America Gaming machine candle device
FR2889904A1 (en) * 2005-08-19 2007-02-23 Pierre Dumas Decoration frame for e.g. sculpture, has printed circuit board with set of series light emitting diodes maintained in recess, and dissipative plate carrying control circuit and placed on rear face of frame
WO2009093131A1 (en) * 2008-01-23 2009-07-30 Kraslex, Ltd. Illuminated signage and advertising display device
WO2013149274A1 (en) * 2012-04-02 2013-10-10 Linda Czapka Glass composite with functional element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2303830A (en) * 1995-07-31 1997-03-05 Toyoda Gosei Kk LED display for a vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2303830A (en) * 1995-07-31 1997-03-05 Toyoda Gosei Kk LED display for a vehicle

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972475A3 (en) * 1998-07-06 2001-09-26 Becker &amp; Hach GmbH &amp; Co.KG Illuminated picture holder
GB2362022A (en) * 2000-03-16 2001-11-07 Beverley Mildred Graham Double skinned illuminated sign
US7014563B2 (en) * 2001-09-28 2006-03-21 Innovative Gaming Corporation Of America Gaming machine candle device
GB2386460A (en) * 2002-01-22 2003-09-17 James Males Portable illuminated sign
EP1346823A1 (en) * 2002-03-17 2003-09-24 Döppner Bauelemente GmbH &amp; Co. KG Transparent element, in particular laminated glazing
WO2004106056A1 (en) * 2003-05-28 2004-12-09 Döppner Bauelemente GmbH & Co. KG Method and device for producing composite elements, and resulting composite element
EP2025510A1 (en) * 2003-05-28 2009-02-18 Döppner Bauelemente GmbH &amp; Co. KG Method for producing compound elements and compound element
WO2005071641A2 (en) * 2004-01-27 2005-08-04 Giancarlo Miani Slim-line luminous sign
WO2005071641A3 (en) * 2004-01-27 2006-01-12 Giancarlo Miani Slim-line luminous sign
FR2889904A1 (en) * 2005-08-19 2007-02-23 Pierre Dumas Decoration frame for e.g. sculpture, has printed circuit board with set of series light emitting diodes maintained in recess, and dissipative plate carrying control circuit and placed on rear face of frame
WO2009093131A1 (en) * 2008-01-23 2009-07-30 Kraslex, Ltd. Illuminated signage and advertising display device
WO2013149274A1 (en) * 2012-04-02 2013-10-10 Linda Czapka Glass composite with functional element
US9462687B2 (en) 2012-04-02 2016-10-04 Linda Czapka Glass composite with functional element
RU2612568C2 (en) * 2012-04-02 2017-03-09 Линда ЧАПКА Multilayer glass with functional element

Also Published As

Publication number Publication date Type
GB2316216B (en) 2000-09-06 grant
GB9616480D0 (en) 1996-09-25 grant

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110806