The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
This article describes an interactive technique used with a data tablet and a plasma display device to identify the coordinate location of a finger placed on the tablet.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
100% of the total text.
Page 1 of 2
Finger Position Detect Method
This article describes an interactive technique used with a data tablet and a
plasma display device to identify the coordinate location of a finger placed on the
Referring to the figures, light source beam 1 is commutated via a rotating
fiber-optic distributor 2 and fiber optic strands 3 fanning out to sequential X and Y
positions 4, 4' in a perimeter frame 5 surrounding the display surface 6.
Associated X (horizontal) and Y (vertical) receiver positions 7, 7', respectively are
connected to a single photo-sensor 8 via a similar commutating fiber-optic
assembly 9 such that emitter/receiver points act in sequential pairs.
A motor 10 drives the commutator at a speed sufficient to detect fast finger
movement, i.e., approximately 10-30 complete X-Y search cycles per second. A
finger will break only one emitter/receiver pair light path in each X and Y axis,
while 16 to 32 pairs in each axis positioned 3/8" to 1/2" between paths is
sufficient for finger-sized detection. One additional rotational position 11 does
not go to the surround frame, but goes directly through an opening from source
to sensor to provide a once-per-revolution high signal amplitude index pulse.
Page 2 of 2
[This page contains 3 pictures or other non-text objects]