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Multipoint touchscreen

a multi-touch, touch-screen technology, applied in the direction of instruments, computing, electric digital data processing, etc., can solve the problems of masking, inability to report a single, lack of tracking multiple points of contact simultaneously,

Inactive Publication Date: 2009-03-12
HOTELLING STEVE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention is about a touch panel that can detect multiple touches or near touches at the same time and produce signals to show where they are located on the panel. The panel is transparent and can be used on top of a display screen to allow users to interact with the display through the touch screen. The invention also includes a method for driving the touch screen and analyzing the data it collects to determine where touches are occurring and detect changes in the touches over time. The invention can be used in computer systems and touch screen arrangements."

Problems solved by technology

One problem found in all of these technologies is that they are only capable of reporting a single point even when multiple objects are placed on the sensing surface.
That is, they lack the ability to track multiple points of contact simultaneously.
In surface wave and infrared technologies, it is impossible to discern the exact position of multiple touch points that fall on the same horizontal or vertical lines due to masking.
In either case, faulty results are generated.
These problems are particularly problematic in tablet PCs where one hand is used to hold the tablet and the other is used to generate touch events.

Method used

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Examples

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Embodiment Construction

[0037]Embodiments of the invention are discussed below with reference to FIGS. 2-19. However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these figures is for explanatory purposes as the invention extends beyond these limited embodiments.

[0038]FIG. 2 is a perspective view of a display arrangement 30, in accordance with one embodiment of the present invention. The display arrangement 30 includes a display 34 and a transparent touch screen 36 positioned in front of the display 34. The display 34 is configured to display a graphical user interface (GUI) including perhaps a pointer or cursor as well as other information to the user. The transparent touch screen 36, on the other hand, is an input device that is sensitive to a user's touch, allowing a user to interact with the graphical user interface on the display 34. By way of example, the touch screen 36 may allow a user to move an input pointer or make selections on the ...

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PUM

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Abstract

A touch panel having a transparent capacitive sensing medium configured to detect multiple touches or near touches that occur at the same time and at distinct locations in the plane of the touch panel and to produce distinct signals representative of the location of the touches on the plane of the touch panel for each of the multiple touches is disclosed.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a division of U.S. patent application Ser. No. 10 / 840,862, filed May 6, 2004, the entire disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates generally to an electronic device having a touch screen. More particularly, the present invention relates to a touch screen capable of sensing multiple points at the same time.[0004]2. Description of the Related Art[0005]There exist today many styles of input devices for performing operations in a computer system. The operations generally correspond to moving a cursor and / or making selections on a display screen. By way of example, the input devices may include buttons or keys, mice, trackballs, touch pads, joy sticks, touch screens and the like. Touch screens, in particular, are becoming increasingly popular because of their ease and versatility of operation as well as to their decli...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F3/045G06F3/033G06F3/041G06F3/044
CPCG06F3/0416G06F2203/04104G06F3/044G06F3/0446G06F3/04166G06F3/0443G06F3/0445G06F3/0412G06F3/04164G02F1/13338G06F2203/04101G06F2203/04105G06F3/0414
Inventor HOTELLING, STEVESTRICKON, JOSHUA A.HUPPI, BRIAN Q.
Owner HOTELLING STEVE
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