Title: Coloringbook, a solid state display device

Abstract: A two-dimensional matrix of semiconductors is arranged in ordered array as a flat, light emitting and light sensing device for input and read-out of information from a computer. A penlight is used to activate the light sensing semiconductors to achieve a graphical input. Operation of the device can be either incremental or random.

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Inventors: Graven, Robert Michael (Orinda, CA, US)

Application Number: 564425
Filing Date: 1975-04-02
Publication_date: 1976-01-13
Assignee:
Primary Class(es): 345/183 178/18.09, 178/19.05, 250/553, 257/89, 313/500, 315/155, 327/515, 340/825.57, 341/173
Other Classes:
US Patent Ref:

2553245	May, 1951	Espenschied	178/18.
2920232	Jan, 1960	Evans	340/173.
2932770	Apr, 1960	Livingston	340/166.
3149311	Sep, 1964	Hyman et al.	307/311.
3201764	Aug, 1965	Parker	340/339.
3340401	Sep, 1967	Young	340/365.
3443332	May, 1969	Christy	40/134.
3479517	Nov, 1969	Bray et al.	250/552.
3505527	Apr, 1970	Slana	307/311.
3539995	Nov, 1970	Brandt	340/365.

Other Refs:
Primary Examiner: Trafton, David L.
Assistant Examiner:
Attorney: Tipton; Robert R.