Browse Prior Art Database

Pen Input Method for Register Capacitor Tablet on CRT Display

IP.com Disclosure Number: IPCOM000108955D
Original Publication Date: 1992-Jul-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Kuriyama, S: AUTHOR [+2]

Abstract

This invention is concerned with the method of inputting on a CRT display, and supplies the operativeness of tablets of resister-division or register-capacitor type.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 63% of the total text.

Pen Input Method for Register Capacitor Tablet on CRT Display

       This invention is concerned with the method of inputting
on a CRT display, and supplies the operativeness of tablets of
resister-division or register-capacitor type.

      The existing devices that unify input and output are
categorized as follows:
      1.  A transparent tablet used on a liquid crystal.
      2.  A pressure-sensitive tablet (or touch-panel) used on a CRT
display.
      3.  Resister-division or register-capacitor tablets used on CRT
display.

      The tablet of type (1) has an input-detector on a liquid
crystal plane, and therefore it can realize high-resolution and can
utilize devices that have low noise against stylus input, etc.  On
the other hand, it lacks the capacity of displaying colors compared
with CRT, for example, CRT can display 160,000 colors, where liquid
crystals can display only 256 colors even if they are prototypes.

      The tablet of type (2), which is inexpensive and is used as an
ATM of a banking system, has low-resolution, for example, tablets of
type (1) or type (3) have the resolution spanned from 1000 X 1000 to
2000 X 2000 and tablets of type (2) have the resolution of about 250
X 250.  Consequently, the tablets of type (3) are effective for the
applications that require full-color and high-resolution.
Nevertheless, the tablet of type (3) has the problem that exact
positions cannot be sensed if the hand grasping a pen touche...