EP 0029474 B1 19850306 - AUDIO-VISUAL DISPLAY SYSTEM
Title (en)
AUDIO-VISUAL DISPLAY SYSTEM
Publication
Application
Priority
- EP 79302703 A 19791127
- AU 5321779 A 19791127
Abstract (en)
[origin: EP0029474A1] The system has a number of channels each giving an electrical output in response to a selected audio-frequency input. Different lamps (18) are connected to the outputs of the channels and project coloured images onto a screen (14). To provide an enhanced visual effect the images are projected across the surface of a concave screen, preferably from the screen periphery. Some lamps incorporate non-laminar light-transmitting elements (22) which give patterned images by refraction or from striations in the element, preferably in the middle to higher frequency range. The highest and lowest frequencies are preferably in the central region of the display. The lamps are preferably arranged in rows (X,Y,Z) at different distances from the screen.
IPC 1-7
IPC 8 full level
A63J 17/00 (2006.01); F21S 10/00 (2006.01)
CPC (source: EP)
A63J 17/00 (2013.01); F21S 10/00 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR IT LU NL SE
DOCDB simple family (publication)
EP 0029474 A1 19810603; EP 0029474 B1 19850306; AU 5321779 A 19810604; AU 532795 B2 19831013
DOCDB simple family (application)
EP 79302703 A 19791127; AU 5321779 A 19791127