Multipoint touchscreen
First Claim
1. 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.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
31 Claims
- 1. 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.
-
13. A display arrangement comprising:
-
a display having a screen for displaying a graphical user interface;
a transparent touch panel allowing the screen to be viewed therethrough and capable of recognizing multiple touch events that occur at different locations on the touch sensitive surface of the touch screen at the same time and to output this information to a host device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
-
27. A computer readable medium including at least computer code executable by a computer, the computer code comprising:
-
receiving multiple touches on the surface of a transparent touch screen at the same time;
separately recognizing each of the multiple touches; and
reporting touch data based on the recognized multiple touches.
-
-
28. A computer system comprising:
-
a processor configured to execute instructions and to carry out operations associated with the computer system;
a display device that is operatively coupled to the processor;
a touch screen that is operatively coupled to the processor, the touch screen being a substantially transparent panel that is positioned in front of the display, the touch screen being configured to track multiple objects, which rest on, tap on or move across the touch screen at the same time, the touch screen including a capacitive sensing device that is divided into several independent and spatially distinct sensing points that are positioned throughout the plane of the touch screen, each sensing point being capable of generating a signal at the same time, the touch screen also including a sensing circuit that acquires data from the sensing device and that supplies the acquired data to the processor.
-
-
29. A touch screen method comprising:
-
driving a plurality of sensing points;
reading the outputs from all the sensing lines connected to the sensing points;
producing and analyzing an image of the touch screen plane at one moment in time in order to determine where objects are touching the touch screen; and
comparing the current image to a past image in order to determine a change at the objects touching the touch screen.
-
-
30. A digital signal processing method, comprising:
-
receiving raw data, the raw data including values for each transparent capacitive sensing node of a touch screen;
filtering the raw data;
generating gradient data;
calculating the boundaries for touch regions base on the gradient data; and
calculating the coordinates for each touch region. - View Dependent Claims (31)
-
Specification