WO2004097773A1 - Display system with animation feature - Google Patents

Display system with animation feature Download PDF

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Publication number
WO2004097773A1
WO2004097773A1 PCT/AU2004/000554 AU2004000554W WO2004097773A1 WO 2004097773 A1 WO2004097773 A1 WO 2004097773A1 AU 2004000554 W AU2004000554 W AU 2004000554W WO 2004097773 A1 WO2004097773 A1 WO 2004097773A1
Authority
WO
WIPO (PCT)
Prior art keywords
indicia
colours
lamp devices
display system
sequence
Prior art date
Application number
PCT/AU2004/000554
Other languages
French (fr)
Inventor
Glen Palmer
Glenn Molloy
Garry Buick
Original Assignee
B.T.B.H. Holdings Limited
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 B.T.B.H. Holdings Limited filed Critical B.T.B.H. Holdings Limited
Priority to AU2004235405A priority Critical patent/AU2004235405A1/en
Publication of WO2004097773A1 publication Critical patent/WO2004097773A1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings 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
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/20—Advertising or display means not otherwise provided for using special optical effects with colour-mixing effects

Definitions

  • This invention relates generally to illuminated display de-vices and has particular though not exclusive application to displays in which illumination is by solid state lamp devices such as light emitting diodes (LEDs).
  • An especially effective application of the invention is to edge-lit display panels.
  • Illuminated displays in which a printed sheet is backed by a transparent edge-lit panel have become a familiar medium for display advertising and information purposes.
  • edge-lit display systems are disclosed in United States patent 5,390,436, and its Australian equivalent, patent 647834, and in international patent publication WO 00/58931.
  • a typical transparent panel material is an acrylic plastic such as Perspex, and one or both primary surfaces of the panel are commonly imprinted with a matrix of dots (as in United States patent 5,390,436) or hollow spots (as in international patent publication WO 00/58931.
  • Another type of panel for edge-lit display systems has an array of polystyrene beads embedded in an acrylic panel body.
  • the conventional illumination source in these systems is an elongate tubular lamp, typically a fluorescent tube, but there have been more recent proposals to make use of the new generation of light emitting diodes that have enhanced luminance so that an array of the LEDs may be effectively employed for illumination purposes.
  • a linear array of LEDs is provided along one or more edges of a panel of a material suitable for edge-lit transmission to one or both primary faces.
  • the invention essentially entails a realisation that one can combine the programmable sequencing of plural lamp devices of different emitted colours with an indicia sheet or face having regions of different colours, to produce a pleasing optical effect.
  • the invention accordingly provides, in one aspect, a display device including an indicia carrier and support means therefor, and means to illuminate said indicia carrier.
  • the indicia have plural indicia regions of different colours
  • the illumination means comprises a plurality of lamp devices that emit different colours.
  • a controller for the lamp devices which is programmed or otherwise set to activate and thereby illuminate the lamp devices in a predetermined sequence.
  • the colours of the indicia carrier and the colours of the lamp devices are selected to interact to produce a sequence of variable observable images during the predetermined sequence of illumination of the lamp devices.
  • the invention provides a method of generating a sequence of variable observable images, comprising activating in a predetermined sequence, a plurality of lamp devices that emit different colours, and thereby illuminating an indicia carrier in which the indicia have plural indicia regions of different colours, wherein said colours of the indicia carrier and said colours of the lamp devices are selected to interact to produce a sequence of variable observable images during said predetermined sequence of illumination of the lamp devices.
  • the sequence of variable observable images preferably appears as an animation effect and thus the invention is able to provide a dynamic varying optical display generated by interaction between the lamp devices and the indicia regions of the indicia carrier.
  • the periods of illumination of the respective lamp devices overlap in time whereby to produce transitional effects in said sequence of variable observable images.
  • the lamp devices include red, green and blue emitting lamps controllable as an RGB set to derive a wide range of spectral colours including white.
  • one or more of the colours of the indicia regions are matched with corresponding or complementary colours of the lamp devices.
  • the indicia could include blue and red regions that may overlap, and the lamp devices may include lamp devices respectively emitting blue and red.
  • said interaction and sequencing are selected to provide a three dimensional effect in the observed images.
  • the indicia carrier is a printed sheet
  • the support means further includes a backing panel that supports the sheet.
  • the backing panel may be arranged with respect to said illumination means as an edge-lit panel which panel and illumination means thereby form an edge-lit display device.
  • the lamp devices are then spaced and arranged in a linear array along one or more edges of the panel so as to emit at least a proportion of their light into the adjacent edge face of the panel.
  • the device may be single-sided or double-sided, ie. with an indicia carrier on one or both sides of a support.
  • the edge-lit panel may support a sheet on one or both of its primary surfaces.
  • the display device is preferably also of the kind described in international patent publication WO 00/58931 , in which at least one (and optionally both) of the opposing primary surfaces of the panel has a matrix of spots each having a hollow transparent interior that allows passage of light therethrough and defines an internal edge for refracting light, thereby enhancing illumination of the respective primary surface.
  • the lamp devices are solid state lamp devices, for example light emitting diode devices or the like.
  • One may employ separate LED devices or packages each having a characteristic colour, or an LED package incorporating plural diodes that emit different colours, or LED devices that are controllable to selectively emit different colours.
  • the LED devices comprise red, green and blue LEDs. Each of these forms of LED device would have application to different embodiments of the invention.
  • the panel and indicia carrier supported thereby are retained in a peripheral frame housing that houses and obscures from view the illumination means at one or more the edges of the panel.
  • this frame housing includes an opening such as a slot by which the indicia carrier can be readily removed and replaced by another carrier having different indicia and producing different sequences of observable images on activation of the lamp illumination sequence.
  • Figure 1 is a front, partially cut away elevational view of a display system incorporating an edge-lit display device in which the illumination lamps are LEDs, which system comprises an embodiment of the invention
  • Figure 2 is a cross-section on the line 2-2 in Figure 1 ;
  • Figure 3 is a colour sequence of observed variable images as viewed on the edge-lit display device of Figure 1 during a predetermined sequence of illumination of the LED lamp devices;
  • Figure 4 is a black and white reproduction of Figure 3.
  • the display system 10 depicted in Figures 1 to 3 is generally as disclosed in WO 00/58931 , to which reference is invited for additional constructional details of the system.
  • the display system includes an edge-lit display device comprising a large panel-like component 12, which has a generally rectangular housing 14 with a peripheral frame 15 and a transparent front wall 16. Behind this transparent front wall is a solid perspex panel 18 that acts as a backing or support for an indicia carrier 20 in the form of a translucent printed sheet 22 replaceably inserted between panel 18 and transparent front wall 16.
  • Panel 18 is edgelit, and sheet 22 thereby illuminated, by respective linear arrays 28 of uniformly spaced LED lamp devices 25 arranged within frame 15 along the longitudinal upright edges 23a, 23b of panel 23.
  • Frame 15 obscures the LED lamp devices from view.
  • LED lamp devices 25 consist of red (R), green (G) and blue (B) emitting LEDs arranged alternately so that each array is a sequence of repeating RGB sets.
  • the surface of panel 18 that sheet 22 overlies may have, for enhancing illumination of the surface, a matrix of spots each having a hollow transparent interior that allows passage of light therethrough and defines an internal edge for refracting light, thereby enhancing illumination of the primary panel surface.
  • LED lamp devices 25 are activated in a controlled sequence by a programmable controller 30 mounted within frame 15 at the bottom of the display device.
  • controller 30 has three output control circuits in parallel, one containing all of the red LEDs, a second for the green LEDs, and a third for the blue LEDs. It will of course be appreciated that more complex circuits are possible, to allow more complex colour mixes, patterns and animations.
  • Power for controller 30 and the LEDs is delivered on cable 32 from a suitable source, which may be external (eg. mains) or internal (eg. a battery pack).
  • the indicia carrier in this case printed sheet 20, carries an image having regions in a variety of different colours.
  • Controller 30 is programmed or otherwise set to activate and thereby illuminate lamps 25 in a predetermined sequence during which the colours of image on the translucent printed sheet 25 and the colours of the lamps are selected to interact to produce a sequence of variable observable images which collectively constitute an animation effect.
  • Figure 3 depicts how a static image on printed sheet 25 is transformed into a continuously changing sequence of visually distinct variations of the image in different colour combinations.
  • the first image at the left has very light blue words on a light red background, with a purple bottle.
  • the second image is blue words on a deep red background, with a mauve bottle.
  • the third image is aqua words on a mix of blues and greens, while the fourth image is wholly green in different shades.
  • the fifth image is blue words on an indigo background and bottle of varying shades.
  • the last image is a brown bottle on an orange background.
  • Panel 18 may of course carry an indicia carrier 22 on both its front and rear faces, ie. its two oppositely facing sides.

Abstract

A display system includes an indicia carrier (20) and support means therefore (18). The indicia have plural indicia regions of different colours. Means (28) to illuminate the indicia carrier comprises a plurality of lamp devices (25) that emit different colours. A controller (30) for the lamp devices is programmed or otherwise set to activate and thereby illuminate the lamp devices in a predetermined sequence. The colours of the indicia carrier and the colours of the lamp devices are selected to interact to produce a sequence of variable observable images during the predetermined sequence of illumination of the lamp devices.

Description

DISPLAY SYSTEM WITH ANIMATION FEATURE
Field of the Invention
This invention relates generally to illuminated display de-vices and has particular though not exclusive application to displays in which illumination is by solid state lamp devices such as light emitting diodes (LEDs). An especially effective application of the invention is to edge-lit display panels.
Background to the Invention
Illuminated displays in which a printed sheet is backed by a transparent edge-lit panel have become a familiar medium for display advertising and information purposes. Examples of edge-lit display systems are disclosed in United States patent 5,390,436, and its Australian equivalent, patent 647834, and in international patent publication WO 00/58931. A typical transparent panel material is an acrylic plastic such as Perspex, and one or both primary surfaces of the panel are commonly imprinted with a matrix of dots (as in United States patent 5,390,436) or hollow spots (as in international patent publication WO 00/58931. Another type of panel for edge-lit display systems has an array of polystyrene beads embedded in an acrylic panel body.
The conventional illumination source in these systems is an elongate tubular lamp, typically a fluorescent tube, but there have been more recent proposals to make use of the new generation of light emitting diodes that have enhanced luminance so that an array of the LEDs may be effectively employed for illumination purposes. In these configurations, a linear array of LEDs is provided along one or more edges of a panel of a material suitable for edge-lit transmission to one or both primary faces.
It is known to achieve variable illumination effects with arrays of LEDs by incorporating a controller for the LED array that is programmable to achieve a selected sequence of illumination of the LEDs. It is an object of the present invention to provide an improved illuminated display system, especially but not exclusively incorporating an edge-lit display device, having enhanced observable optical effects.
Summary of the Invention
The invention essentially entails a realisation that one can combine the programmable sequencing of plural lamp devices of different emitted colours with an indicia sheet or face having regions of different colours, to produce a pleasing optical effect.
The invention accordingly provides, in one aspect, a display device including an indicia carrier and support means therefor, and means to illuminate said indicia carrier. The indicia have plural indicia regions of different colours, and the illumination means comprises a plurality of lamp devices that emit different colours. There is further provided a controller for the lamp devices which is programmed or otherwise set to activate and thereby illuminate the lamp devices in a predetermined sequence. The colours of the indicia carrier and the colours of the lamp devices are selected to interact to produce a sequence of variable observable images during the predetermined sequence of illumination of the lamp devices.
In another aspect, the invention provides a method of generating a sequence of variable observable images, comprising activating in a predetermined sequence, a plurality of lamp devices that emit different colours, and thereby illuminating an indicia carrier in which the indicia have plural indicia regions of different colours, wherein said colours of the indicia carrier and said colours of the lamp devices are selected to interact to produce a sequence of variable observable images during said predetermined sequence of illumination of the lamp devices.
The sequence of variable observable images preferably appears as an animation effect and thus the invention is able to provide a dynamic varying optical display generated by interaction between the lamp devices and the indicia regions of the indicia carrier.
Advantageously, the periods of illumination of the respective lamp devices overlap in time whereby to produce transitional effects in said sequence of variable observable images.
Preferably, the lamp devices include red, green and blue emitting lamps controllable as an RGB set to derive a wide range of spectral colours including white.
Preferably, one or more of the colours of the indicia regions are matched with corresponding or complementary colours of the lamp devices. For example, the indicia could include blue and red regions that may overlap, and the lamp devices may include lamp devices respectively emitting blue and red.
It is understood that the interaction between the lamp colours and the indicia colours may involve different colours combining to produce a net filtered or modulated effect.
Advantageously, said interaction and sequencing are selected to provide a three dimensional effect in the observed images.
In an advantageous embodiment, the indicia carrier is a printed sheet, and the support means further includes a backing panel that supports the sheet. The backing panel may be arranged with respect to said illumination means as an edge-lit panel which panel and illumination means thereby form an edge-lit display device. Conveniently, the lamp devices are then spaced and arranged in a linear array along one or more edges of the panel so as to emit at least a proportion of their light into the adjacent edge face of the panel.
The device may be single-sided or double-sided, ie. with an indicia carrier on one or both sides of a support. In the embodiment just mentioned, the edge-lit panel may support a sheet on one or both of its primary surfaces. The display device is preferably also of the kind described in international patent publication WO 00/58931 , in which at least one (and optionally both) of the opposing primary surfaces of the panel has a matrix of spots each having a hollow transparent interior that allows passage of light therethrough and defines an internal edge for refracting light, thereby enhancing illumination of the respective primary surface.
Preferably, the lamp devices are solid state lamp devices, for example light emitting diode devices or the like. One may employ separate LED devices or packages each having a characteristic colour, or an LED package incorporating plural diodes that emit different colours, or LED devices that are controllable to selectively emit different colours. Advantageously, the LED devices comprise red, green and blue LEDs. Each of these forms of LED device would have application to different embodiments of the invention.
Typically, in and edge-lit display device according to an embodiment of the invention, the panel and indicia carrier supported thereby are retained in a peripheral frame housing that houses and obscures from view the illumination means at one or more the edges of the panel. Conveniently, this frame housing includes an opening such as a slot by which the indicia carrier can be readily removed and replaced by another carrier having different indicia and producing different sequences of observable images on activation of the lamp illumination sequence.
Brief Description of the Drawings
The invention will now be further described, by way of example only, with reference to the accompanying drawings in which:
Figure 1 is a front, partially cut away elevational view of a display system incorporating an edge-lit display device in which the illumination lamps are LEDs, which system comprises an embodiment of the invention;
Figure 2 is a cross-section on the line 2-2 in Figure 1 ; Figure 3 is a colour sequence of observed variable images as viewed on the edge-lit display device of Figure 1 during a predetermined sequence of illumination of the LED lamp devices; and
Figure 4 is a black and white reproduction of Figure 3.
Description of Embodiments of the Invention
The display system 10 depicted in Figures 1 to 3 is generally as disclosed in WO 00/58931 , to which reference is invited for additional constructional details of the system. The display system includes an edge-lit display device comprising a large panel-like component 12, which has a generally rectangular housing 14 with a peripheral frame 15 and a transparent front wall 16. Behind this transparent front wall is a solid perspex panel 18 that acts as a backing or support for an indicia carrier 20 in the form of a translucent printed sheet 22 replaceably inserted between panel 18 and transparent front wall 16.
Panel 18 is edgelit, and sheet 22 thereby illuminated, by respective linear arrays 28 of uniformly spaced LED lamp devices 25 arranged within frame 15 along the longitudinal upright edges 23a, 23b of panel 23. Frame 15 obscures the LED lamp devices from view. LED lamp devices 25 consist of red (R), green (G) and blue (B) emitting LEDs arranged alternately so that each array is a sequence of repeating RGB sets.
The surface of panel 18 that sheet 22 overlies may have, for enhancing illumination of the surface, a matrix of spots each having a hollow transparent interior that allows passage of light therethrough and defines an internal edge for refracting light, thereby enhancing illumination of the primary panel surface.
LED lamp devices 25 are activated in a controlled sequence by a programmable controller 30 mounted within frame 15 at the bottom of the display device. In this case, controller 30 has three output control circuits in parallel, one containing all of the red LEDs, a second for the green LEDs, and a third for the blue LEDs. It will of course be appreciated that more complex circuits are possible, to allow more complex colour mixes, patterns and animations. Power for controller 30 and the LEDs is delivered on cable 32 from a suitable source, which may be external (eg. mains) or internal (eg. a battery pack).
The indicia carrier, in this case printed sheet 20, carries an image having regions in a variety of different colours. Controller 30 is programmed or otherwise set to activate and thereby illuminate lamps 25 in a predetermined sequence during which the colours of image on the translucent printed sheet 25 and the colours of the lamps are selected to interact to produce a sequence of variable observable images which collectively constitute an animation effect.
This effect is illustrated in Figure 3, which depicts how a static image on printed sheet 25 is transformed into a continuously changing sequence of visually distinct variations of the image in different colour combinations. In Figure 3, the first image at the left has very light blue words on a light red background, with a purple bottle. The second image is blue words on a deep red background, with a mauve bottle. The third image is aqua words on a mix of blues and greens, while the fourth image is wholly green in different shades. The fifth image is blue words on an indigo background and bottle of varying shades. The last image is a brown bottle on an orange background.
A black and white reproduction of Figure 3 is included as Figure 4.
It will be seen that components of the image appear and fade, especially if the intervals of activation or illumination of the LED lamp devices are controlled to overlap in time to give a visually pleasing transitional or continuously changing appearance of the observed indicia during which the RGB sets derive a wide range of spectral colours including white.
Panel 18 may of course carry an indicia carrier 22 on both its front and rear faces, ie. its two oppositely facing sides.

Claims

1 A display system including:
an indicia carrier and support means therefor, which indicia have plural indicia regions of different colours;
means to illuminate said indicia carrier, which illumination means comprises a plurality of lamp devices that emit different colours; and
a controller for said lamp devices which is programmed or otherwise set to activate and thereby illuminate said lamp devices in a predetermined sequence;
wherein said colours of the indicia carrier and said colours of the lamp devices are selected to interact to produce a sequence of variable observable images during said predetermined sequence of illumination of the lamp devices.
2 A display system according to claim 1 wherein said sequence of variable observable images is an animation effect, and thereby a dynamic varying optical display is generated by interaction between the lamp devices and the indicia regions of the indicia carrier.
3 A display system according to claim 1 or 2 wherein the periods of illumination of the respective lamp devices overlap in time whereby to produce transitional effects in said sequence of variable observable images.
4 A display system according to claims 1 , 2 or 3 wherein said lamp devices include red, green and blue emitting lamps controllable as an RGB set to derive a wide range of spectral colours including white.
5 A display system according to any one of claims 1 to 4, wherein one or more of the colours of the indicia regions are matched with corresponding or complementary colours of the lamp devices. A display system according to any one of claims 1 to 5, wherein the interaction between the lamp colours and the indicia colours involves different colours combining to produce a net filtered or modulated effect.
A display system according to any one of claims 1 to 6 wherein said interaction and sequencing are selected to provide a three dimensional effect in the observed images.
A display system according to any one of claims 1 to 7 wherein the system is double-sided, with an indicia carrier on two oppositely facing sides of the support means.
A display system according to any one of claims 1 to 8, wherein the indicia carrier is a printed sheet, and said support means includes a backing panel that supports the sheet.
A display system according to claim 9 wherein said backing panel is arranged with respect to said illumination means as an edge-lit panel, which panel and illumination means thereby form an edge-lit display device.
A display system according to claim 10 wherein said lamp devices are spaced and arranged in a linear array along one or more edges of the panel so as to emit at least a proportion of their light into the adjacent edge face of the panel.
A display system according to claim 10 or 11 , wherein at least one of the opposing primary surfaces of the panel has a matrix of spots each having a hollow transparent interior that allows passage of light therethrough and defines an internal edge for refracting light, thereby enhancing illumination of the respective primary surface.
A display system according to any one of claims 9 to 12, further including a peripheral frame housing that retains said panel and indicia carrier, and also houses and obscures from view the illumination means at one or more the edges of the panel. A display system according to claim 13 wherein said frame housing includes an opening by which the indicia carrier can be readily removed and replaced by another carrier that has different indicia and produces different sequences of observable images on activation of the lamp illumination sequence.
A display system according to any one of claims 1 to 14 wherein said lamp devices are solid state lamp devices.
A display system according to claim 15 wherein said lamp devices are light emitting diode (LED) devices.
A display system according to claim 16 wherein said LED devices comprise red, green and blue LEDs.
A method of generating a sequence of variable observable images, comprising activating, in a predetermined sequence, a plurality of lamp devices that emit different colours, and thereby illuminating an indicia carrier in which the indicia have plural indicia regions of different colours, wherein said colours of the indicia carrier and said colours of the lamp devices are selected to interact to produce a sequence of variable observable images during said predetermined sequence of activation of the lamp devices.
A method according to claim 18, wherein said sequence of variable observable images is an animation effect, and thereby a dynamic varying optical display is generated by interaction between the lamp devices and the indicia regions of the indicia carrier.
A method according to claim 18 or 19, wherein the periods of illumination of the respective lamp devices overlap in time whereby to produce transitional effects in said sequence of variable observable images. A method according to any one of claims 18 to 20, wherein said lamp devices include red, green and blue emitting lamps controllable as an RGB set to derive a wide range of spectral colours including white.
A method according to any one of claims 18 to 21 , wherein one or more of the colours of the indicia regions are matched with corresponding or complementary colours of the lamp devices.
A method according to any one of claims 18 to 22, wherein the interaction between the lamp colours and the indicia colours involves different colours combining to produce a net filtered or modulated effect.
A method according to any one of claims 18 to 23 wherein said interaction and sequencing are selected to provide a three dimensional effect in the observed images.
PCT/AU2004/000554 2003-04-30 2004-04-30 Display system with animation feature WO2004097773A1 (en)

Priority Applications (1)

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AU2004235405A AU2004235405A1 (en) 2003-04-30 2004-04-30 Display system with animation feature

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2003902056 2003-04-30
AU2003902056A AU2003902056A0 (en) 2003-04-30 2003-04-30 Display device with animation feature

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006058836A2 (en) * 2004-12-02 2006-06-08 Asulab S.A. Electronic device comprising a light guide provided with at least two interleaved light extractor groups
DE102007009443B3 (en) * 2007-02-23 2008-06-26 Semperlux Ag - Lichttechnische Werke - Illumination arrangement for lighting of escalators, has illuminant radiating from surface with controllable radiation characteristic and screen is integrated with controllable radiation characteristic
FR2920859A1 (en) * 2007-09-12 2009-03-13 David Luo LIGHTING AND DISPLAY DEVICE AND METHOD
DE102011000702A1 (en) * 2011-02-14 2012-08-16 Hella Kgaa Hueck & Co. Tarmac road signs
DE102012217293A1 (en) * 2012-09-25 2014-03-27 Zumtobel Lighting Gmbh LED light with light guide plate
CN104818812A (en) * 2015-05-11 2015-08-05 金陵科技学院 Color-variable water wall used for decoration

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GB2204440A (en) * 1987-03-06 1988-11-09 George Mahon Music display panel
GB2230638A (en) * 1989-04-17 1990-10-24 Kaumagraph Electroluminescent Colour displays

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204440A (en) * 1987-03-06 1988-11-09 George Mahon Music display panel
GB2230638A (en) * 1989-04-17 1990-10-24 Kaumagraph Electroluminescent Colour displays

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7883256B2 (en) 2004-12-02 2011-02-08 Asulab S.A. Electronic device including optical guide provided with at least two groups of interlaced optical extractors
US7883255B2 (en) 2004-12-02 2011-02-08 Asulab S.A. Electronic device including optical guide provided with sequentially illuminated optical extractors
WO2006058836A3 (en) * 2004-12-02 2006-08-24 Asulab Sa Electronic device comprising a light guide provided with at least two interleaved light extractor groups
WO2006058834A3 (en) * 2004-12-02 2006-08-24 Asulab Sa Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups
CN100487605C (en) * 2004-12-02 2009-05-13 阿苏拉布股份有限公司 Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups
US7839726B2 (en) 2004-12-02 2010-11-23 Asulab S.A. Timepiece including optical guide which performs the function of a crystal
WO2006058834A2 (en) * 2004-12-02 2006-06-08 Asulab S.A. Electronic device comprising a light guide provided with at least two interleaved sequentially illuminated light extractor groups
WO2006058836A2 (en) * 2004-12-02 2006-06-08 Asulab S.A. Electronic device comprising a light guide provided with at least two interleaved light extractor groups
DE102007009443B3 (en) * 2007-02-23 2008-06-26 Semperlux Ag - Lichttechnische Werke - Illumination arrangement for lighting of escalators, has illuminant radiating from surface with controllable radiation characteristic and screen is integrated with controllable radiation characteristic
WO2009034451A1 (en) * 2007-09-12 2009-03-19 David Luo Lighting device and method
FR2920859A1 (en) * 2007-09-12 2009-03-13 David Luo LIGHTING AND DISPLAY DEVICE AND METHOD
DE102011000702A1 (en) * 2011-02-14 2012-08-16 Hella Kgaa Hueck & Co. Tarmac road signs
DE102012217293A1 (en) * 2012-09-25 2014-03-27 Zumtobel Lighting Gmbh LED light with light guide plate
CN104818812A (en) * 2015-05-11 2015-08-05 金陵科技学院 Color-variable water wall used for decoration

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