EP 0770949 B1 20010905 - Photoresponsive device for controlling the lighting in a room
Title (en)
Photoresponsive device for controlling the lighting in a room
Title (de)
Lichtempfindliche Vorrichtung zur Regelung der Beleuchtungsstärke in einem Raum
Title (fr)
Dispositif photosensible pour l'installation de commandes du niveau d'éclairement d'un local
Publication
Application
Priority
FR 9512581 A 19951025
Abstract (en)
[origin: EP0770949A1] The photosensor device comprises a photosensitive element (6) mounted on a base (7) with its sensitive surface facing upwards. The sensor is covered by a conical screen (8) forming an optical integrator. The optical transmission through the conical screen varies according to the angle at which light enters with respect to the vertical. A transmission mask (9) is applied to the outside surface of the cone, between two angles (theta-1, theta-2). This is intended to attenuate the sensitivity of the sensor when light is incident between two specified angles (aCmin, aCmax).
IPC 1-7
IPC 8 full level
G01J 1/02 (2006.01); G05D 25/02 (2006.01); H05B 41/392 (2006.01)
CPC (source: EP)
H05B 41/3922 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES GB IT LI NL SE
DOCDB simple family (publication)
EP 0770949 A1 19970502; EP 0770949 B1 20010905; AT E205315 T1 20010915; DE 69614964 D1 20011011; ES 2104540 T1 19971016; FR 2740573 A1 19970430; FR 2740573 B1 19971226; JP H09178552 A 19970711
DOCDB simple family (application)
EP 96810687 A 19961014; AT 96810687 T 19961014; DE 69614964 T 19961014; ES 96810687 T 19961014; FR 9512581 A 19951025; JP 28400196 A 19961025