The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 1990
Filed:
Apr. 19, 1988
Masahiko Ibamoto, Katsuta, JP;
Satoshi Shimada, Hitachi, JP;
Shinji Ohyama, Hitachi, JP;
Manabu Sato, Hitachi, JP;
Soshiro Kuzunuki, Katsuta, JP;
Mitsunari Kano, Seto, JP;
Hitachi Ltd., Tokyo, JP;
Abstract
In a liquid crystal display combined with a signal input tablet of the type which includes a light source, a liquid crystal display disposed on the light source and a transparent tablet for detecting a planar write position by a hand-writing pen which tablet is disposed on the liquid crystal display, the present invention is characterized in that a two-dimensional lens array is disposed as one-to-one erect imaging optical system between the liquid crystal display and the transparent tablet so that the display image of the liquid crystal display is projected as the same size erect image on the surface of the transparent tablet having a light diffusion operation.