WO2001019056A1 - Illumination of a keypad and display - Google Patents

Illumination of a keypad and display Download PDF

Info

Publication number
WO2001019056A1
WO2001019056A1 PCT/DE2000/003068 DE0003068W WO0119056A1 WO 2001019056 A1 WO2001019056 A1 WO 2001019056A1 DE 0003068 W DE0003068 W DE 0003068W WO 0119056 A1 WO0119056 A1 WO 0119056A1
Authority
WO
WIPO (PCT)
Prior art keywords
display
leds
keyboard
backlight
color
Prior art date
Application number
PCT/DE2000/003068
Other languages
German (de)
French (fr)
Inventor
Tom Rudolph
Klaus Radermacher
Stephan Krammes
Matthias Effler
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2001019056A1 publication Critical patent/WO2001019056A1/en

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones

Definitions

  • the invention relates to the backlighting of keyboards and displays, in particular keyboards and displays for mobile telephones.
  • LEDs Light Emitting Diodes
  • LEDs are green, i.e. with a wavelength of 570 n.
  • the background color can be switched.
  • the background color can be changed depending on the type of caller, as is the case with the GD900 mobile phone from Panasonic.
  • the background color of the keyboard and display is identical here. Another disadvantage is that a distinction can only be made between two caller groups.
  • the invention is therefore based on the object of providing a backlight for the keyboard and display, preferably a cell phone, which offers additional options while at the same time reducing the power requirement.
  • the present invention relates to a backlight for the keyboard and the display, the backlighting being effected with "high efficiency LEDs". Furthermore, the keyboard or the display can be illuminated by the combination of different colored LEDs. Furthermore, a backlight of the type described above is used in a mobile phone according to the invention for the keyboard and display.
  • the background color of the mobile telephone according to the invention can be selected depending on the caller group and / or the color can be tuned.
  • the keyboard can have a different color than the display.
  • the background color can advantageously be selected depending on the caller group. There is a possibility that the for
  • Backlights used LEDs can be controlled individually, which means that depending on the caller group, only one or two differently colored LEDs can be controlled.
  • a light-emitting diode carrier that contains three individual LEDs in the colors red, green and blue. Additive color mixing can produce white light in this way if the intensities of the LEDs are matched to one another. By controlling the light intensity of the individual LEDs, any color can be generated according to the laws of additive color metrology and used as backlighting.
  • FIG. 1 shows a schematic representation of a mobile telephone 1 with a keyboard 2 and a display 3.
  • Both the individual keys of the keyboard 2 and the display 3 are backlit by LEDs, not shown, with the use of either several LEDs with different colors or more adjustable LEDs, the individual buttons or the display are illuminated in a desired or predetermined color.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Telephone Function (AREA)

Abstract

Predetermined or desired colored back lighting can be created for a keypad or display of a mobile telephone by using different colored or adjustable LEDs.

Description

Tastatur- und Displaybeleuchtung Keyboard and display lighting
Die Erfindung betrifft die Hintergrundbeleuchtung von Tastaturen und Displays, insbesondere Tastaturen und Displays für Mobiltelefone.The invention relates to the backlighting of keyboards and displays, in particular keyboards and displays for mobile telephones.
In allen Mobiltelefonen wird standardmäßig eine Hintergrundbeleuchtung sowohl von der Tastatur als auch von dem Display verwendet. Üblicherweise werden dabei LEDs (Light Emitting Diodes) in der Farbe Grün, d.h. mit einer Wellenlänge von 570 n , eingesetzt.In all mobile phones, backlighting is used by default both on the keyboard and on the display. Usually LEDs (Light Emitting Diodes) are green, i.e. with a wavelength of 570 n.
Seit kurzem gibt es Hersteller, die sogenannte "Chamäleon"- LEDs in Mobiltelefonen als Hintergrundbeleuchtung verwenden, bei denen eine Umschaltung der Hintergrundfarbe möglich ist. So kann beispielsweise die Hintergrundfarbe je nach Anrufertyp geändert werden, wie dies bei dem Mobiltelefon GD900 der Firma Panasonic der Fall ist. Allerdings ist hier die Hintergrundfarbe von Tastatur und Display identisch. Ferner ist da- bei nachteilig, daß nur zwischen zwei Anrufergruppen unterschieden werden kann.Recently there have been manufacturers who use so-called "chameleon" LEDs in cell phones as backlighting, where the background color can be switched. For example, the background color can be changed depending on the type of caller, as is the case with the GD900 mobile phone from Panasonic. However, the background color of the keyboard and display is identical here. Another disadvantage is that a distinction can only be made between two caller groups.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Hintergrundbeleuchtung für Tastatur und Display, vorzugsweise eines Mobiltelefons, zu schaffen, die zusätzliche Möglichkeiten bei gleichzeitiger Verringerung des Strombedarfs bietet.The invention is therefore based on the object of providing a backlight for the keyboard and display, preferably a cell phone, which offers additional options while at the same time reducing the power requirement.
Die Aufgabe wird durch die Merkmale der Hintergrundbeleuchtung nach Anspruch 1 sowie dem Mobiltelefon nach Anspruch 5 gelöst. Bevorzugte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.The object is achieved by the features of the backlight according to claim 1 and the mobile phone according to claim 5. Preferred embodiments of the invention are the subject of the dependent claims.
Die vorliegende Erfindung betrifft eine Hintergrundbeleuchtung für Tastatur und Display, wobei die Hintergrundbeleuch- tung mit "high efficiency LEDs" bewirkt wird. Ferner kann die Tastatur bzw. das Display durch die Kombination verschiedenfarbiger LEDs beleuchtet werden. Ferner wird m einem erfmdungsgemaßen Mob ltelefon für Tastatur und Display eine Hintergrundbeleuchtung der im vorangegangenen beschriebenen Art verwendet.The present invention relates to a backlight for the keyboard and the display, the backlighting being effected with "high efficiency LEDs". Furthermore, the keyboard or the display can be illuminated by the combination of different colored LEDs. Furthermore, a backlight of the type described above is used in a mobile phone according to the invention for the keyboard and display.
Dabei kann beispielsweise die Hintergrundfarbe des erfm- dungsgemaßen Mobiltelefons j e nach Anrufergruppe gewählt und/oder die Farbe ist durchstimmbar.For example, the background color of the mobile telephone according to the invention can be selected depending on the caller group and / or the color can be tuned.
Durch den Einsatz neuer "high efficiency LEDs" ist eine deutlich hellere Ausleuchtung der Tastatur und des Displays möglich, wobei der Stromverbrauch sich relativ zu dem der üblichen grünen LEDs unterscheidet. Die Hmtergrundhelligkeit durch "high efficiency LEDs" ist im Vergleich zu der enigen grüner LEDs mindestens einen Faktor 2 hoher bei gleichemThe use of new "high efficiency LEDs" enables a much brighter illumination of the keyboard and the display, whereby the power consumption differs relative to that of the usual green LEDs. The background brightness due to "high efficiency LEDs" is at least a factor 2 higher than that of green LEDs
Stromverbrauch. Durch den Einsatz der "high efficiency LEDs" mit verschiedenen Farben sind neue Design-Moglichkeiten der Ausstattung eines Mobiltelefons zu erreichen. Derartige "high efficiency LEDs" weisen Leuchtdichten von oberhalb 8 Cd auf.Power consumption. By using the "high efficiency LEDs" with different colors, new design options for equipping a mobile phone can be achieved. Such "high efficiency LEDs" have luminances of above 8 Cd.
Folgende Möglichkeiten sind durch den Einsatz verschiedenfarbiger LEDs als Hintergrundbeleuchtung bei Mobiltelefonen möglich.The following options are possible by using differently colored LEDs as background lighting for mobile phones.
Die Tastatur kann eine andere Farbe aufweisen als das Display.The keyboard can have a different color than the display.
Durch den Einsatz verschiedenfarbiger LEDs kann vorteilhaf- terweise die Hintergrundfarbe j e nach Anrufergruppe ausge- wählt werden. Dabei besteht die Möglichkeit, daß die zurBy using differently colored LEDs, the background color can advantageously be selected depending on the caller group. There is a possibility that the for
Hintergrundbeleuchtung verwendeten LEDs einzeln angesteuert werden, wodurch, j e nach Anrufergruppe, nur eine oder zwei verschiedenfarbige LEDs angesteuert werden.Backlights used LEDs can be controlled individually, which means that depending on the caller group, only one or two differently colored LEDs can be controlled.
Ferner ist es möglich, die LEDs in einer bestimmten Reihenfolge anzusteuern, beispielsweise indem man sie nacheinander an- und wieder ausschaltet, was den Eindruck eines laufenden Lichtes hervorruft. Dies könnte beispielsweise als Signal für einen ankommenden Ruf verwendet werden.It is also possible to control the LEDs in a certain order, for example by turning them on and off one after the other, giving the impression of a running one Evokes light. For example, this could be used as a signal for an incoming call.
Es ist möglich, die Hintergrundbeleuchtung auf die Gehäuse- färbe abzustimmen, beispielsweise indem Hintergrundbeleuchtung und Gehäusefarbe die gleiche Farbe aufweisen oder aus Komplementärfarben bestehen.It is possible to match the backlight to the housing color, for example by having the backlight and housing color the same color or consisting of complementary colors.
Es ist auch möglich, einen Leuchtdiodenträger zu schaffen, der drei einzelne LEDs in den Farben Rot, Grün und Blau enthält. Durch additive Farbmischung kann auf diese Weise weißes Licht erzeugt werden, falls die Intensitäten der LEDs aufeinander abgestimmt werden. Durch Steuerung der Lichtintensität der Einzel-LEDs kann nach den Gesetzen der additiven Farbme- trik eine beliebige Farbe erzeugt und als Hintergrundbeleuchtung verwendet werden.It is also possible to create a light-emitting diode carrier that contains three individual LEDs in the colors red, green and blue. Additive color mixing can produce white light in this way if the intensities of the LEDs are matched to one another. By controlling the light intensity of the individual LEDs, any color can be generated according to the laws of additive color metrology and used as backlighting.
Die Erfindung wird nachfolgend anhand einer Zeichung erläutert .The invention is explained below with reference to a drawing.
Fig. 1 zeigt in schematischer Darstellung ein Mobiltelefon 1 mit Tastatur 2 sowie einer Anzeige 3. Sowohl die einzelnen Tasten der Tastatur 2 als die Anzeige 3 werden durch nicht dargestellte LEDs hintergrundbeleuchtet, wobei durch die Ver- wendung entweder mehrerer LEDs mit unterschiedlichen Farben oder abstimmbarer LEDs die einzelnen Tasten bzw. die Anzeige in einer gewünschten oder vorbestimmten Farbe beleuchtet werden. 1 shows a schematic representation of a mobile telephone 1 with a keyboard 2 and a display 3. Both the individual keys of the keyboard 2 and the display 3 are backlit by LEDs, not shown, with the use of either several LEDs with different colors or more adjustable LEDs, the individual buttons or the display are illuminated in a desired or predetermined color.

Claims

Patentansprüche claims
1. Hintergrundbeleuchtung für Tastatur (2) und Display (3), dadurch gekennzeichnet, daß die Hintergrundbe- leuchtung mit "high efficiency LEDs" bewirkt wird.1. Backlight for keyboard (2) and display (3), characterized in that the backlighting is effected with "high efficiency LEDs".
2. Hintergrundbeleuchtung nach Anspruch 1, dadurch gekennzeichnet, daß die Hintergrundbeleuchtung durch die Kombination verschiedenfarbiger LEDs bewirkt wird.2. Backlight according to claim 1, characterized in that the backlight is effected by the combination of different colored LEDs.
3. Mobiltelefon (1) mit Tastatur (2) und Display (3), dadurch gekennzeichnet, daß eine Hintergrundbeleuchtung nach einem der vorangegangenen Ansprüche verwendet wird.3. Mobile phone (1) with keyboard (2) and display (3), characterized in that a backlight is used according to one of the preceding claims.
4. Mobiltelefon (1) nach Anspruch 3, dadurch gekennzeichnet, daß die Hintergrundfarbe nach Anrufergruppe gewählt wird.4. Mobile phone (1) according to claim 3, characterized in that the background color is selected according to the caller group.
5. Mobiltelefon (l)nach einem der Ansprüche 3 oder 4, da- durch gekennzeichnet, daß die Hintergrundfarbe durchsti mbar ist. 5. Mobile phone (l) according to one of claims 3 or 4, characterized in that the background color is mbar.
PCT/DE2000/003068 1999-09-06 2000-09-05 Illumination of a keypad and display WO2001019056A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19942454.3 1999-09-06
DE19942454 1999-09-06

Publications (1)

Publication Number Publication Date
WO2001019056A1 true WO2001019056A1 (en) 2001-03-15

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1170930A1 (en) * 2000-07-06 2002-01-09 Sagem SA Apparatus and method for modulating the backlight illumination in an electronic autonomous device
GB2371720A (en) * 2000-11-21 2002-07-31 Nec Corp Musical ring tone accompanied by light or vibration
EP1251676A1 (en) * 2001-04-19 2002-10-23 Siemens Aktiengesellschaft Communication device with different back-light and keyboard illumination colours controlled by transmitted information
WO2005017931A1 (en) * 2004-02-16 2005-02-24 Siemens Aktiengesellschaft A keypad, an electronic device, and a method of changing the appearance of one or more keys
WO2005117518A2 (en) * 2004-06-03 2005-12-15 Nokia Corporation Controlling the appearance of a hand-portable electronic device
EP1428199B1 (en) * 2001-09-19 2010-04-28 Casio Computer Co., Ltd. Display device and control system thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5708428A (en) * 1996-12-10 1998-01-13 Ericsson Inc. Method and apparatus for providing backlighting for keypads and LCD panels
JPH1093675A (en) * 1996-09-13 1998-04-10 Nec Corp Portable mobile radio telephone system
EP0872996A2 (en) * 1997-04-17 1998-10-21 Nokia Mobile Phones Ltd. User interface for a telephone apparatus with guide lights
GB2333392A (en) * 1998-01-19 1999-07-21 Matsushita Electric Ind Co Ltd Display with variable colour backlight

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1093675A (en) * 1996-09-13 1998-04-10 Nec Corp Portable mobile radio telephone system
US5708428A (en) * 1996-12-10 1998-01-13 Ericsson Inc. Method and apparatus for providing backlighting for keypads and LCD panels
EP0872996A2 (en) * 1997-04-17 1998-10-21 Nokia Mobile Phones Ltd. User interface for a telephone apparatus with guide lights
GB2333392A (en) * 1998-01-19 1999-07-21 Matsushita Electric Ind Co Ltd Display with variable colour backlight

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 09 31 July 1998 (1998-07-31) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1170930A1 (en) * 2000-07-06 2002-01-09 Sagem SA Apparatus and method for modulating the backlight illumination in an electronic autonomous device
FR2811465A1 (en) * 2000-07-06 2002-01-11 Sagem DEVICE AND METHOD FOR MODULATING THE BACKLIGHT OF A SELF-CONTAINED APPARATUS
GB2371720A (en) * 2000-11-21 2002-07-31 Nec Corp Musical ring tone accompanied by light or vibration
GB2371720B (en) * 2000-11-21 2003-10-01 Nec Corp System and method for sounding a music accompanied by light or vibration
US6963761B2 (en) 2000-11-21 2005-11-08 Nec Corporation System and method for sounding a music accompanied by light or vibration
EP1251676A1 (en) * 2001-04-19 2002-10-23 Siemens Aktiengesellschaft Communication device with different back-light and keyboard illumination colours controlled by transmitted information
EP1428199B1 (en) * 2001-09-19 2010-04-28 Casio Computer Co., Ltd. Display device and control system thereof
WO2005017931A1 (en) * 2004-02-16 2005-02-24 Siemens Aktiengesellschaft A keypad, an electronic device, and a method of changing the appearance of one or more keys
WO2005117518A2 (en) * 2004-06-03 2005-12-15 Nokia Corporation Controlling the appearance of a hand-portable electronic device
WO2005117518A3 (en) * 2004-06-03 2006-03-02 Nokia Corp Controlling the appearance of a hand-portable electronic device
JP2008501270A (en) * 2004-06-03 2008-01-17 ノキア コーポレイション Controlling the appearance of portable electronic devices
KR100845622B1 (en) * 2004-06-03 2008-07-10 노키아 코포레이션 Controlling the appearance of a hand-portable electronic device

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