GB2370404A - Portable data processing apparatus with backlit display screen and shell of such an apparatus - Google Patents
Portable data processing apparatus with backlit display screen and shell of such an apparatus Download PDFInfo
- Publication number
- GB2370404A GB2370404A GB0120386A GB0120386A GB2370404A GB 2370404 A GB2370404 A GB 2370404A GB 0120386 A GB0120386 A GB 0120386A GB 0120386 A GB0120386 A GB 0120386A GB 2370404 A GB2370404 A GB 2370404A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shell
- screen
- external light
- aperture
- passage
- 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.)
- Withdrawn
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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
-
- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/003—Lens or lenticular sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S11/00—Non-electric lighting devices or systems using daylight
-
- 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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133618—Illuminating devices for ambient light
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
Abstract
The portable data processing apparatus, with a display screen (2) in the front face (11) of a shell (1) and an internal backlighting device (5, 6) for the screen (2) in the shell (1), includes a window (16) for the passage of external light (20) to illuminate the screen (2) from the rear, which makes it possible to improve the span of the battery.
Description
Portable data processing apparatus with backlit display screen and shell
of such an apparatus The invention relates to a data processing apparatus with 5 a display screen, in the front face of a shell and a device for backlighting the screen in the shell of the apparatus, as well as, moreover, the shell itself.
Reference is made here especially to electronic diaries and above all to cellular radiotelephony terminals and, lo more generally, to apparatus which is termed portable, i.e. able to be held in the hand and slid into a bag or a garment pocket.
The screen backlight is a very important source of energy 15 consumption which is prejudicial to the independence of the apparatus.
The present invention aims at overcoming this difficulty and at being able to consult the apparatus without using 20 its energy supply, even with a degraded image quality.
To this end, the invention relates to a portable data processing apparatus with a display screen in the front face of a shell and an internal backlighting device for 25 the screen in the shell, characterized by the fact that there is provided in the apparatus a window for the passage of external light to illuminate the screen from behind. 30 Also, thanks to the invention, it is possible to illuminate the rear of the screen by means of daylight.
Even if the lighting conditions are not excellent, in daytime periods, this is not crucial.
It can be a matter of an apparatus with an LCD screen, indeed even with a colour TFT (thin film transistor) screen, for example, and in the latter case the invention is interesting because the reproduction of colours is not 5 too altered.
In one embodiment of the apparatus, the window for the passage of external light is arranged at the rear of the screen and this is then a matter of direct backlighting.
lo But by preference, this window is provided laterally and the internal backlighting device has a surface to reflect the external light and this is then a matter of indirect backlighting. 15 Advantageously also, in the case of indirect backlighting, there is provided, between the screen and the internal backlighting device, an optical conduit for capturing the flux of external light, arranged to transmit both the external light and that of the internal backlighting 20 device.
In a certain embodiment of the apparatus of the invention, the optical conduit includes the window for the passage of external light.
Still in the case of an optical conduit for capturing the flux of external light, it can be interesting that the internal backlighting device includes a layer of electroluminescent ink deposited on the optical conduit.
30 Advantageously also, the shell of the apparatus is shaped so that the display screen extends in the shade of the shell.
The invention also relates to a shell for a portable data processing apparatus comprising a first gaping aperture, to receive a display screen, and a second gaping aperture for the passage of the external light for illumination.
By "gaping aperture" must be understood an aperture which is not a simple discreet orifice such as those associated with a loudspeaker or a microphone of a cellular radiotelephony terminal.
By preference the two apertures extend in substantially orthogonal planes.
In this case it is interesting that the first screen 15 aperture extends in a plane crossing the second lighting aperture. The invention will be better understood with the aid of the following description of a preferred embodiment of the
20 portable data processing apparatus of the invention, with reference to the attached drawing, on which: À Fig. 1 is a view from the right in a partial lateral section and Fig. 2 is a corresponding front view.
The apparatus represented is in this example a portable cellular radiotelephony GSM handset, of which solely a 30 high or upper end portion of the shell 1 constituting its housing has been represented with a liquid crystal display (LCD) screen 2, to be illuminated, the portion not
represented, termed lower, of the housing 1 comprising a keypad. The housing 1, of a general shape which is approximately a 5 parallelepipedic rectangle, comprises a substantially flat front wall 11, including a first gaping aperture 12, which the screen 2 closes, and a rear wall 13 substantially parallel to the front wall 11. The housing 1 comprises in addition a lateral high or upper end wall 14, connecting lo walls 11 and 13, including a second gaping aperture for illuminating 15 the housing 1, thus in a plane substantially orthogonal to that of the screen aperture 12. In this example, the second aperture 15 has maximum dimensions, i.e. it extends substantially from the front 15 wall 11 to the rear wall 13, thus over the entire thickness of the housing 1 as Fig. 1 shows, and this over substantially the entire width of the housing 1 (Fig. 2).
As Fig. 1 illustrates, the front wall 11 includes, in its 20 high end zone, a bulging portion or protuberance 17 limited by the front edge of the second aperture 15.
Because of this, the plane of the first screen aperture 12 crosses the second lighting aperture 15.
25 The second aperture 15 is closed by a lateral window 16 for the passage of a beam 20 of exterior light to illuminate the screen 12 from the rear. The beam 20 has here been drawn with an orientation substantially parallel to an axis termed vertical 10, i.e. parallel to walls 11 30 and 13 and in the plane of Fig. 1.
In this example, the window 16 presents itself, according to the section of Fig. 1, in the form of a layer of
transparent material which is curved overall and has a concavity turned towards the interior, with an external saw toothed face to form a collecting dioptre. The teeth have different inclinations so that the most lateral rays 5 of the beam 20 are deflected by refraction in an accrued manner to form in total a convergent beam 3.
The window 16 thus constitutes a convergent lens in the focal point of which (thus in fact a segment on the right lo in the plane of Fig. 2) is disposed a collecting end 4 of an optical unit 5 forming a conduit for capturing the flux 20 and illuminating the screen 2.
The optical unit 5 is here made up of a block of glass or 5 optically equivalent material, with an optical index greater than that of air, the end portion 4 of which is in the form of a plate illuminated by the section at the level of the above focal point. This plate 4 is prolonged, in the direction of axis 10, by a more solid 20 portion presenting a rear reflecting surface 51, slightly inclined towards axis 10 to be partially turned towards plate 4, and presenting here, on the front face, a constant greater thickness than plate 4. This front face is pressed against the rear face of the screen 2. A front 25 pane 7, for protecting the screen 2, is fixed on the edges of the first aperture 12. Unit 5 is disposed between the screen 2 and an optical source 6. More precisely, on the rear face 51 of the optical unit 5 is applied the optical source 6, fed by battery, of internal backlighting for the 30 screen 2. The rear surface 51 is thus reflective, or at least semi-reflective for the rays coming from plate 4 and is transparent for the optical flux emitted by source 6.
The internal source 6 provides a luminous flux which is
sufficient on its own to illuminate the screen 2 well and thus permit easy reading of the displayed information.
The solid portion of the optical unit 5 is thus functionally simultaneously an external lighting element 5 and an internal lighting element associated with source 6.
Window 16 and optical unit 5 constitute, overall and functionally, an optical conduit for backlighting the screen 2 making it possible to use for this purpose the lo optical flux of an external source such as the sun or a lamp. The internal and external sources are thus functionally in parallel. It is thus possible to use the external source as a supplement to reduce the consumption of the internal source 6, whilst preserving good lighting, 5 or even to de-activate the internal source 6, even if it means having possibly to tolerate a reduction in the legibility of the screen 2.
As indicated, the rear surface 51 of the optical unit 5 is 20 inclined towards the centre plane (axis 10) of the end plate 4 in such a way as to capture and progressively reflect almost the totality of the laminar optical flux which the plate 4 propagates. This laminar flux is thus reflected (arrows) in the form of a flux with enlarged 25 thickness and a cross-section corresponding to the height of the screen 2. A layer of reflective material 52, here electroluminescent ink, is deposited for this purpose on the inclined surface 51 in order to form a layer for diffusing the external light. As indicated above, layer 30 52 allows the optical flux of source 6 to pass. The beam 20 being substantially parallel to the plane of the front face 11, the screen 2 extends in the shade of protuberance 17 of the shell 1, which improves legibility.
Various embodiment variants can be envisaged.
The window 16 could in particular have been provided at 5 the rear of the screen 2, in the rear wall 13, for direct backlighting replacing the indirect backlighting described above by means of the optical conduit 5 for internal backlighting with the surface 51 for reflecting the external light 20, 3, conduit 5 transmitting both the lo external light 20 and that of the internal source 6.
It would also have been possible to have provided for the optical conduit 5 to include the window 16 for the passage of external light 20, i.e. for the entry end of the conduit 5 to be in direct contact with the exterior of the 15 shell 1 and thus form a one-piece lens for capturing and guiding the external optical flux 20.
The reader's attention is directed to all papers and documents which are filed concurrently with or previous to 20 this specification in connection with this application and
which are open to public inspection with this specification, and the contents of all such papers and
documents are incorporated herein by reference.
25 All of the features disclosed in this specification
(including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features 30 and/or steps are mutually exclusive.
Each feature disclosed in this specification (including
any accompanying claims, abstract and drawings), may be
replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series 5 of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s). The invention extend to any novel one, or any novel combination, of the features disclosed lo in this specification (including any accompanying claims,
abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Claims (12)
1. Portable data processing apparatus with a display screen in the front face of a shell and an internal 5 backlighting device for the screen in the shell (1), -characterized in that there is provided in the apparatus a window (16) for the passage of external light (20) to illuminate the screen (2) from the rear.
lo
2. Apparatus according to claim 1, wherein the window for the passage of external light is arranged at the rear of the screen.
3. Apparatus according to claim 1, wherein the window for IS the passage of light is arranged laterally and the internal backlighting device has a surface to reflect the external light.
4. Apparatus according to claim 3, wherein there is 20 provided, between the screen and the internal backlighting device, an optical conduit for capturing the flux of external light arranged to transmit both the external light and that of the internal backlighting device.
5. Apparatus according to one of claims 1 to 4, wherein the optical conduit includes the window for the passage of external light.
30
6. Apparatus according to one of claims 3 to 5, wherein the internal backlighting device includes a layer of electroluminescent ink deposited on the optical conduit.
7. Apparatus according to one of claims 1 to 6, wherein the shell of the apparatus is shaped so that the display screen extends in the shade of the shell.
5
8. Shell for a portable apparatus according to claim 1, comprising a first gaping aperture, for receiving a display screen, and a second gaping aperture, for the passage of external light for illumination.
lo
9. Shell according to claim 8, wherein the two apertures extend in substantially orthogonal planes.
10. Shell according to claim 9, wherein the first screen aperture (12) extends in a plane crossing the second 15 lighting aperture (15).
11. Portable data processing apparatus substantially as described herein, with reference to the drawings that follow.
12. Shell for a portable apparatus according to claim 1, substantially as described herein with reference to the drawings that follow.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0011176A FR2813699B1 (en) | 2000-09-01 | 2000-09-01 | PORTABLE DATA PROCESSING APPARATUS WITH BACKLIGHT DISPLAY SCREEN AND SHELL OF SUCH APPARATUS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0120386D0 GB0120386D0 (en) | 2001-10-17 |
| GB2370404A true GB2370404A (en) | 2002-06-26 |
Family
ID=8853889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0120386A Withdrawn GB2370404A (en) | 2000-09-01 | 2001-08-22 | Portable data processing apparatus with backlit display screen and shell of such an apparatus |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE10141775A1 (en) |
| FR (1) | FR2813699B1 (en) |
| GB (1) | GB2370404A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1780990A1 (en) * | 2005-10-26 | 2007-05-02 | Research In Motion Limited | System and method for providing ambient light to a display in an electronic device |
| US7213955B1 (en) | 2005-10-26 | 2007-05-08 | Research In Motion Limited | System and method for providing ambient light to a display in an electronic device |
| US8149351B2 (en) | 2008-12-08 | 2012-04-03 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled backlights for sunlight viewable displays |
| US8228463B2 (en) | 2009-11-18 | 2012-07-24 | 3M Innovative Properties Company | Passive daylight-coupled backlight with turning film having prisms with chaos for sunlight viewable displays |
| US8339542B2 (en) | 2009-06-26 | 2012-12-25 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled N-stack and collapsible backlights for sunlight viewable displays |
| US8384852B2 (en) | 2010-11-22 | 2013-02-26 | 3M Innovative Properties Company | Hybrid daylight-coupled backlights for sunlight viewable displays |
| WO2014071645A1 (en) * | 2012-11-12 | 2014-05-15 | 深圳市华星光电技术有限公司 | Sunlight-assisted side-edge type backlight module and liquid crystal display |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0815703A (en) * | 1994-06-30 | 1996-01-19 | Sony Corp | Irradiation mechanism for lcd |
| JPH11249136A (en) * | 1998-03-05 | 1999-09-17 | Sony Corp | Back light device |
| JP2000162576A (en) * | 2000-01-01 | 2000-06-16 | Seiko Epson Corp | Liquid crystal display device and digital camera using it |
| JP2000241800A (en) * | 1999-02-22 | 2000-09-08 | Olympus Optical Co Ltd | Display device of camera |
| US6254245B1 (en) * | 1997-10-13 | 2001-07-03 | Sanyo Electric Co., Ltd. | Backlight for liquid crystal displays |
| EP1132677A2 (en) * | 1999-04-30 | 2001-09-12 | Matsushita Electric Industrial Co., Ltd. | Lighting device and liquid crystal display |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1152374A (en) * | 1997-08-08 | 1999-02-26 | Sanyo Electric Co Ltd | Liquid crystal display device with light condensing mechanism |
| JPH11212092A (en) * | 1998-01-23 | 1999-08-06 | Kawaguchiko Seimitsu Kk | Liquid crystal display device |
-
2000
- 2000-09-01 FR FR0011176A patent/FR2813699B1/en not_active Expired - Fee Related
-
2001
- 2001-08-22 GB GB0120386A patent/GB2370404A/en not_active Withdrawn
- 2001-08-25 DE DE10141775A patent/DE10141775A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0815703A (en) * | 1994-06-30 | 1996-01-19 | Sony Corp | Irradiation mechanism for lcd |
| US6254245B1 (en) * | 1997-10-13 | 2001-07-03 | Sanyo Electric Co., Ltd. | Backlight for liquid crystal displays |
| JPH11249136A (en) * | 1998-03-05 | 1999-09-17 | Sony Corp | Back light device |
| JP2000241800A (en) * | 1999-02-22 | 2000-09-08 | Olympus Optical Co Ltd | Display device of camera |
| EP1132677A2 (en) * | 1999-04-30 | 2001-09-12 | Matsushita Electric Industrial Co., Ltd. | Lighting device and liquid crystal display |
| JP2000162576A (en) * | 2000-01-01 | 2000-06-16 | Seiko Epson Corp | Liquid crystal display device and digital camera using it |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1780990A1 (en) * | 2005-10-26 | 2007-05-02 | Research In Motion Limited | System and method for providing ambient light to a display in an electronic device |
| US7213955B1 (en) | 2005-10-26 | 2007-05-08 | Research In Motion Limited | System and method for providing ambient light to a display in an electronic device |
| US7500775B2 (en) | 2005-10-26 | 2009-03-10 | Research In Motion Limited | System and method for providing ambient light to a display in an electronic device |
| US8149351B2 (en) | 2008-12-08 | 2012-04-03 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled backlights for sunlight viewable displays |
| US8339542B2 (en) | 2009-06-26 | 2012-12-25 | 3M Innovative Properties Company | Passive and hybrid daylight-coupled N-stack and collapsible backlights for sunlight viewable displays |
| US8228463B2 (en) | 2009-11-18 | 2012-07-24 | 3M Innovative Properties Company | Passive daylight-coupled backlight with turning film having prisms with chaos for sunlight viewable displays |
| US8384852B2 (en) | 2010-11-22 | 2013-02-26 | 3M Innovative Properties Company | Hybrid daylight-coupled backlights for sunlight viewable displays |
| WO2014071645A1 (en) * | 2012-11-12 | 2014-05-15 | 深圳市华星光电技术有限公司 | Sunlight-assisted side-edge type backlight module and liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0120386D0 (en) | 2001-10-17 |
| FR2813699B1 (en) | 2003-01-24 |
| DE10141775A1 (en) | 2002-03-28 |
| FR2813699A1 (en) | 2002-03-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AT | Applications terminated before publication under section 16(1) | ||
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |