Document Type and Number:
Japanese Patent JPH0429087
Kind Code:
B2
Abstract:
PURPOSE:To display the desired patterns and characters on a liquid crystal display and also to project these patterns and characters on a screen, by shifting an input pen to designate a coordinate position on a tablet via a liquid crystal display and a concave mirror. CONSTITUTION:A tablet control circuit 21 contains a tablet 14, an X direction multiplexer 22 and a Y direction multiplexer 23 and detects the voltage induced electromagnetically via a detection line included in the tablet 14. The loci of the corresponding patterns and characters are defined as X and Y coordinates and said induced voltage is sent to a control circuit 18 via both multiplexers 22 and 23. Then these pattern and character loci drawn on a liquid crystal display 11 via an input pen 13 are displayed visibly on the display 11 in the same locus. This display of the display 11 is projected on a screen by the light leaves given from a light source 4.
Application Number:
JP9913386A
Publication Date:
May 18, 1992
Filing Date:
April 28, 1986
Export Citation:
International Classes:
G06F3/041; G06K11/06
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