-
公开(公告)号：DE2753968A1
公开(公告)日：1978-07-06
申请号：DE2753968
申请日：1977-12-03
Applicant: IBM
Inventor： DYM HERBERT , KRAKINOWSKI MORRIS
Abstract: A new capacitive tablet has a single layer in which electrodes provide capacitive coupling with a pen to produce signals that correspond to the X and Y dimensions of the position of the pen on the tablet. The electrodes in the single layer are in the form of pairs of complementary shaped, closely adjacent, conductive elements that extend in the Y dimension of the tablet. For sensing the pen position in the Y dimension, an alternating voltage is applied between the two elements of a pair and the pen receives a signal that is a function of the pen position in the Y dimension. The tablet includes a number of such pairs, each having a different X dimension position, and for sensing the pen position in the X dimension, the two electrodes of a pair are given an alternating voltage that differs progressively across the X dimension of the tablet.
-
公开(公告)号：DE2656721A1
公开(公告)日：1977-06-30
申请号：DE2656721
申请日：1976-12-15
Applicant: IBM
Inventor： DYM HERBERT , LOWY PAUL , SALYER GREG
Abstract: An improved operation is provided for a graphic tablet of the type in which a pen is capacitively coupled to sets of X dimension wires and Y dimension wires that are digitally activated to produce a pen signal that signifies the position of the pen on the tablet. Compensation is provided for variations in the pen signal that are attributable only to differences in the height of the pen above the tablet as the pen is operated over intervening layers of paper of various thicknesses. The drivers that activate the tablet are controlled to establish a sequence of different activation patterns and a corresponding sequence of analog pen signals. These signals are operated on to produce a pen position address that is substantially compensated for variations in pen height.
-
Patent Agency Ranking
公开(公告)号：FR2313662A1
公开(公告)日：1976-12-31
申请号：FR7613463
申请日：1976-04-29
Applicant: IBM
Inventor： DYM HERBERT , KAMBIC STANLEY F , LOWY PAUL , SALYER GREG
Abstract: The graph table is provided with perpendicular X and Y coordinate lines, with a control circuit for selectively supplying an AC signal to the coordinate lines, so as to excite a particular line. The stylus is positioned on the table so that it can be electrically coupled to the coordinate lines in order to receive the AC signal. The control circuit is used to provide a selected excitation configuration of the lines in a given dimension, with means for receiving the signal from the stylus to form a position address for the stylus. Pref. the control circuit allows the lines on one side of the stylus position to be excited, while the lines on the other side of the stylus position are not excited.
-
公开(公告)号：DE2412020A1
公开(公告)日：1974-10-03
申请号：DE2412020
申请日：1974-03-13
Applicant: IBM
Inventor： DYM HERBERT
Abstract: A graphic data tablet of the type which includes at least one voltage divider element from which is developed signals indicative of position points along a coordinate direction. Position points along other coordinate directions are measured using other voltage divider elements. Each voltage divider element is sectionalized to permit the drive potential to be applied across a particular section or across the entire element. Position points are determined by first determining the section within which a position detecting pen is situated and subsequently the position of the pen within the section. Sectionalizing the tablet increases the tablet resolution. By providing overlapping sections, problems associated with nonlinearity at section boundaries are eliminated.
-
公开(公告)号：CA838275A
公开(公告)日：1970-03-31
申请号：CA838275D
Applicant: IBM
Inventor： DYM HERBERT , BOGHOLTZ RICHARD JR
-
公开(公告)号：CA828340A
公开(公告)日：1969-11-25
申请号：CA828340D
Applicant: IBM
Inventor： DYM HERBERT , MAZZA ROBERT V
-
-
-
-
-
-
Search Results
37
records
(took 0.02 seconds)
