Visual lecture aid

Details Visual lecture aid Visual lecture aid

1993-08-02

1995-06-27

Cuchlinski, Jr., William A.

Optics: image projectors

Miscellaneous

G03B 2100

Patent

active

054284171

ABSTRACT:
An overlay projection apparatus for aiding in the communication of graphic presentations to large audiences by enabling the on-screen writing of overlay icons, highlighting bars and alpha-numeric labels as selected by the presenter. Brightness and color control of overlay highlighting graphics provide audience visual comfort over a wide variation of projected underlay graphic and ambient light conditions. Digital formation of overlay graphics by presenter/lecturer touch control command from a remote video panel also enables total storage and recall of multiple frames of complex overlay graphics with matching underlay graphics for reemphasis or for question and answer sessions between the lecturer and audience.

REFERENCES:
patent: 4291954 (1981-09-01), Wilson
patent: 4568161 (1986-02-01), DiGiaufilippo et al.
patent: 4812034 (1989-03-01), Mochizuki et al.
patent: 4846694 (1989-07-01), Erhardt
patent: 4944578 (1990-07-01), Denison
patent: 5101197 (1992-03-01), Hix et al.

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