0572182-A1 is referenced by 51 patents and cites 4 patents.

A display unit of an integral input type is provided with a display panel (60) having a liquid crystal (32) as a display medium. In the display unit, an optical waveguide (36,73) is integrally formed in the shape of a matrix and substantially guides light having a predetermined wavelength in parallel with a surface of a display substrate (30,31,71,72,85,88). Thus, light emitted by a pen held by the user is guided to the periphery of the display substrate where photosensors are used to determine the position pointed at by the pen.

Title
Display unit with integral optical input apparatus.
Application Number
EP19930303944 19930520
Publication Number
0572182 (A1)
Application Date
May 20, 1993
Publication Date
December 1, 1993
Inventor
Yamamoto Yoshitaka
JP
Ishii Yutaka
JP
Assignee
Sharp
JP
IPC
G02F 01/136
G02F 01/1333
G06F 03/033
G09G 03/36
G06F 03/033
G02F 01/13
G06F 03/041
G09G 03/36
G06F 03/033
G02F 01/1362
G02F 01/1333
G06F 03/041
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