(19)
(11) EP 0 328 358 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.05.1990 Bulletin 1990/20

(43) Date of publication A2:
16.08.1989 Bulletin 1989/33

(21) Application number: 89301189.0

(22) Date of filing: 08.02.1989
(51) International Patent Classification (IPC)4: F21V 9/10
(84) Designated Contracting States:
DE ES FR GB IT

(30) Priority: 08.02.1988 CN 88201246

(71) Applicant: Umeda, Toshiaki
New York, N.Y. 10010 (US)

(72) Inventor:
  • Wu, Zuyou
    Chongwen District Beijing (CN)

(74) Representative: Blanco White, Henry Nicholas et al
ABEL & IMRAY Northumberland House 303-306 High Holborn
London WC1V 7LH
London WC1V 7LH (GB)


(56) References cited: : 
   
       


    (54) A variable colour light


    (57) A variable colour light comprises a container (10) for constituting a light bulb, red, green and blue lights (R,G,B) so situated in the container that colours from the lights mix together, and a device (14) for controlling the red, green and blue lights (R,G,B). The controlling device (14) controls brightness and length of operation of each light so that the colour emitted from the container (10) can be changed as desired. The colour of the light bulb (10) may be changed automatically.







    Search report