G
PHYSICS
G09
EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G09G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3/00
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
G09G3/20
for 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
G09G3/34
by control of light from an independent source