P. de Bruyne
ABSTRACT
Accurate X,Y position determining digitizers presently require a precision array of wires embedded in the tablet. In rear-projection tablets these wires tend to limit the optical quality of images projected on the screen. Principles of acoustic radar are applied in a device which achieves better resolution, at a lower cost and without the use of wires, either in a tablet or a cursor. The function of acoustic reflectors for automatic calibration is described, achieving an accuracy of + mn; 0.01% of the distance to the sensors. In the case of small tablets, a hand-held stylus may be tracked at the rate of 900 locations a second.
- 1.Brenner, A.E., de Bruyne, P. SONIC PEN: A digital stylus system. IEEE Transactions on Computers, V. C 19, No 6 (1970) pp. 546-548. |he device is made by Science Accessories Corp. of Southport, Conn.Google Scholar
Digital Library
- 2.Philipow, E. Taschenbuch der Elektrotechnik V.3 Nachrichtentechnik p. 1382.Google Scholar
- 3.Mason, W.P. Physical Acoustics V. 1 Part A (1964) pp. 169-270, Academic Press N.Y.Google Scholar
- 4.Sell, H. Eine neue Kapazitive Methode zur Umwandlung mechanischer Schwingungen in elektrische und umgekehrt. Z. f. technische Physik (1937) 3.Google Scholar
- 5.Anke, D. Luftschallwandler nach dem Sell-Prinzip für Frequenzen von 50 kHz bis 100 kHz. Acustica V. 30 (1974) pp. 30 - 39.Google Scholar
- 6.Skolnik, M. I. Radar Systems, McGrawhill Book Co. N.Y. (1962) p. 43.Google Scholar
- 7.de Bruyne, P. Authentication of Handwriting with SONAR. Proceedings of the 1980 International conference "Security through Science and Engineering" Berlin ( to be published Sept. 1980).Google Scholar
- 8.de Bruyne, P. Developments in Signature Verification. Security Management Vo1. 22, No. 6 (1978) pp. 57 - 61.Google Scholar
Index Terms
Acoustic radar graphic input device
Recommendations
Acoustic radar graphic input device
Accurate X,Y position determining digitizers presently require a precision array of wires embedded in the tablet. In rear-projection tablets these wires tend to limit the optical quality of images projected on the screen. Principles of acoustic radar ...
Gaze and Touch Interaction on Tablets
UIST '16: Proceedings of the 29th Annual Symposium on User Interface Software and TechnologyWe explore how gaze can support touch interaction on tablets. When holding the device, the free thumb is normally limited in reach, but can provide an opportunity for indirect touch input. Here we propose gaze and touch input, where touches redirect to ...
Exploring and Understanding Unintended Touch during Direct Pen Interaction
The user experience on tablets that support both touch and styli is less than ideal, due in large part to the problem of unintended touch or palm rejection. Devices are often unable to distinguish between intended touch (i.e., interaction on the screen ...
Comments