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1. WO2000041378 - BACKLIGHT FOR A PORTABLE DEVICE

Publication Number WO/2000/041378
Publication Date 13.07.2000
International Application No. PCT/GB1999/004446
International Filing Date 24.12.1999
Chapter 2 Demand Filed 01.05.2000
IPC
H04M 1/02 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
MTELEPHONIC COMMUNICATION
1Substation equipment, e.g. for use by subscribers
02Constructional features of telephone sets
H04M 1/22 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
MTELEPHONIC COMMUNICATION
1Substation equipment, e.g. for use by subscribers
02Constructional features of telephone sets
22Illumination; Arrangements for improving the visibility of characters on dials
H04M 1/727 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
MTELEPHONIC COMMUNICATION
1Substation equipment, e.g. for use by subscribers
72Substation extension arrangements; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selecting
725Cordless telephones
727Identification code transfer arrangements
H04M 1/73 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
MTELEPHONIC COMMUNICATION
1Substation equipment, e.g. for use by subscribers
72Substation extension arrangements; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selecting
725Cordless telephones
73Battery saving arrangements
CPC
G09G 2320/0626
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
06Adjustment of display parameters
0626for control of overall brightness
G09G 2330/021
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2330Aspects of power supply; Aspects of display protection and defect management
02Details of power systems and of start or stop of display operation
021Power management, e.g. power saving
G09G 2360/144
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2360Aspects of the architecture of display systems
14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
144the light being ambient light
G09G 2360/145
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2360Aspects of the architecture of display systems
14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
145the light originating from the display screen
G09G 3/3406
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix ; no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
34by control of light from an independent source
3406Control of illumination source
H01H 2219/038
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
2219Legends
036Light emitting elements
038ambient light dependent
Applicants
  • NOKIA MOBILE PHONES LIMITED [FI/FI]; Keilalahdentie 4 FIN-02150 Espoo, FI (AllExceptUS)
  • ATKINSON, Christopher [GB/GB]; GB (UsOnly)
  • LEWIS, Ian [GB/GB]; GB (UsOnly)
  • CAMERON, Ian [GB/GB]; GB (UsOnly)
Inventors
  • ATKINSON, Christopher; GB
  • LEWIS, Ian; GB
  • CAMERON, Ian; GB
Agents
  • HIBBERT, Juliet ; Nokia IPR Dept. Nokia House Summit Avenue Farnborough Hants GU14 0NG, GB
Priority Data
9828878.031.12.1998GB
9913540.210.06.1999GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) BACKLIGHT FOR A PORTABLE DEVICE
(FR) RETRO-ECLAIRAGE POUR DISPOSITIF PORTABLE
Abstract
(EN)
A handportable device is disclosed which comprises a user interface (1), a light detector (21) for detecting the light incident on at least part of the user interface, a comparator for comparing the light detected with a given threshold and control means for controlling an illuminator for illuminating the user interface in dependence upon the output of the comparator. Preferably the light detector is positioned to detect light incident on the device, which light is the sum of ambient light and the light from the illuminator.
(FR)
Cette invention concerne un dispositif manuel portable comprenant une interface utilisateur, un détecteur de lumière (21) conçu pour détecter la lumière qui frappe au moins une partie de l'interface utilisateur, un comparateur destiné à comparer la lumière détectée à une valeur de seuil et des moyens de commande commandant à un dispositif d'éclairage d'éclairer l'interface utilisateur conformément aux indications données par le comparateur. Le détecteur de lumière sera de préférence positionné de manière à détecter la lumière que frappe le dispositif, laquelle lumière est la somme de la lumière ambiante et de celle émise par le dispositif d'éclairage.
Also published as
US09869534
Latest bibliographic data on file with the International Bureau