News Column

"Method, Device and Computer-Readable Recording Medium for Sensing Touch on Touch Panel" in Patent Application Approval Process

August 7, 2014



By a News Reporter-Staff News Editor at Computer Weekly News -- A patent application by the inventors Yoon, Sangsic (Yonginsi, JP); KIM, Bonkee (Seongnamsi, KR), filed on January 14, 2013, was made available online on July 24, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application has not been assigned to a company or institution.

The following quote was obtained by the news editors from the background information supplied by the inventors: "In general, with the development of electronic communication technology, a variety of electronic devices are being provided. The electronic devices have a tendency to have manipulation easiness and a good design. In accordance with the trend, it is emphasized that an input device including a representative keyboard or keypad should be diversified.

"The input device has been developed from a data processing by using the input device such as the keyboard or keypad to a touch panel functioning as both an input device and an output device. The touch panel has a concept which commonly designates an input device allowing a user to input data by using no separate input equipments. Regarding the touch panel, data is inputted by directly touching a display panel. The touch panel data input is performed in a simply way and has less malfunction.

"In the mean time, with the recent development and popularization of a graphic user interface (GUI) system, a touch screen is now being generally used which allows a user to simply input. The touch screen is implemented by recognizing the location of a touch occurrence on a touch sensor panel and then by performing an action corresponding to the location.

"The touch sensor panel may be formed in the form of a matrix comprised of row wirings and column wirings. A sensor or pixel is located at a point where the row wirings and column wirings cross each other. Each row wiring can be driven by a sensing signal. Because electric charges injected into the column wiring by the sensing signal is proportional to the amount of touching, the location of touch can be recognized. In general, after the same sensing signal is serially inputted to the row wirings respectively, the location of the touch is recognized by receiving the signal through each column wiring. However, for the purpose of discriminating the sensing signal inputted to each row wiring, each sensing signal must be serially inputted. Accordingly, an observation time allocated to each row wiring has no choice but to be limited and precision of the touch sensing is naturally reduced. Further, if there is noise having the same frequency as that of the sensing signal, the precision of the touch sensing has no choice but to be reduced more."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "One embodiment is a method for sensing touch on a touch panel including a plurality of drive lines and a plurality of sensing lines, wherein the drive lines and the sensing lines cross each other. The method includes: applying parallelly sensing signals having mutually different frequencies to at least two out of a plurality of the drive lines; and separating only a signal having a specific frequency from signals outputted from the sensing lines.

"Another embodiment is a method for sensing touch on a touch panel including a plurality of drive lines and a plurality of sensing lines, wherein the drive lines and the sensing lines cross each other. The method includes: applying parallelly sensing signals having the same frequency and mutually different phase delays to at least two out of a plurality of the drive lines; and separating only a signal having a specific frequency and a specific phase from signals outputted from the sensing lines.

"A plurality of the drive lines are divided into two or more groups. The applying sensing signals may include: applying parallelly sensing signals having mutually different frequencies to the drive lines belonging to mutually different groups; and applying parallelly sensing signals having the same frequency and mutually different phase delays to the drive lines belonging to the same group.

"A plurality of the drive lines are divided into two or more groups. The applying sensing signals may include: applying parallelly sensing signals having the frequencies and phase delays, either or both of which are mutually different from each other to the drive lines belonging to mutually different groups; and applying serially sensing signals having the same frequency and the same phase delay to the drive lines belonging to the same group. It is recommended that the sensing signals having mutually different phase delays have an orthogonal relationship with each other.

"Further another embodiment is a method for sensing touch on a touch panel including a plurality of drive lines and a plurality of sensing lines, wherein the drive lines and the sensing lines cross each other. The method includes: applying sensing signals through a combination of two or more signals having frequencies and phases, either or both of which are mutually different from each other to at least one out of a plurality of the drive lines; and separating at least one signal from signals outputted from the sensing lines.

"The applying sensing signals may include inputting parallelly sensing signals obtained through a combination of two or more signals having frequencies and phases, either or both of which are mutually different from each other to at least two out of a plurality of the drive lines. It is recommended that the signals having mutually different frequencies have an orthogonal relationship with each other.

"Yet another embodiment is a device for sensing touch on a touch panel including a plurality of drive lines and a plurality of sensing lines, wherein the drive lines and the sensing lines cross each other. The device includes: a sensing signal generator which applies parallelly sensing signals having mutually different frequencies to at least two out of a plurality of the drive lines; and a touch determination unit which separates only a signal having a specific-frequency from signals outputted from the sensing lines and determines the occurrence and location of the touch.

"Still another embodiment is a device for sensing touch on a touch panel including a plurality of drive lines and a plurality of sensing lines, wherein the drive lines and the sensing lines cross each other. The device includes: a sensing signal generator which applies parallelly sensing signals having the same frequency and mutually different phase delays to at least two out of a plurality of the drive lines; and a touch determination unit which separates only a signal having a specific frequency and a specific phase from signals outputted from the sensing lines and determines the occurrence and location of the touch.

"A plurality of the drive lines are divided into two or more groups. The sensing signal generator may apply parallelly sensing signals having mutually different frequencies to the drive lines belonging to mutually different groups, and may apply parallelly sensing signals having the same frequency and mutually different phase delays to the drive lines belonging to the same group.

"A plurality of the drive lines are divided into two or more groups. The sensing signal generator may apply parallelly sensing signals having the frequencies and phase delays, either or both of which are mutually different from each other to the drive lines belonging to mutually different groups, and may apply serially sensing signals having the same frequency and the same phase delay to the drive lines belonging to the same group. It is recommended that the sensing signals having mutually different phase delays have an orthogonal relationship with each other.

"Still another embodiment is a device for sensing touch on a touch panel including a plurality of drive lines and a plurality of sensing lines, wherein the drive lines and the sensing lines cross each other. The device includes: a sensing signal generator which applies sensing signals through a combination of two or more signals having frequencies and phases, either or both of which are mutually different from each other to at least one out of a plurality of the drive lines; and a touch determination unit which separates at least one signal from signals outputted from the sensing lines and determines the occurrence and location of the touch.

"The sensing signal generator may input parallelly sensing signals obtained through a combination of two or more signals having frequencies and phases, either or both of which are mutually different from each other to at least two out of a plurality of the drive lines. It is recommended that the signals having mutually different frequencies have an orthogonal relationship with each other.

"Meanwhile, still another embodiment is a method for sensing the occurrence and location of touch on a touch panel by using sensing signals having -frequencies and phases, either or both of which are different from each other, and a computer-readable medium for recording a computer program for executing the method.

BRIEF DESCRIPTION OF THE DRAWINGS

"Arrangements and embodiments may be described in detail with reference to the following drawings in which like reference numerals refer to like elements and wherein:

"FIG. 1 is a view for describing a general method for sensing touch on a touch panel;

"FIG. 2 is a view for describing a method for sensing touch in accordance with a first embodiment of the present invention;

"FIG. 3 is a view for describing a method for sensing touch in accordance with a second embodiment of the present invention;

"FIG. 4 is a view for describing a method for sensing touch in accordance with a third embodiment of the present invention;

"FIG. 5 is a view for describing a method tor sensing touch in accordance with a fourth embodiment of the present invention; and

"FIGS. 6 and 7 are views for describing a method for sensing touch hi accordance with a fifth embodiment of the present invention."

URL and more information on this patent application, see: Yoon, Sangsic; KIM, Bonkee. Method, Device and Computer-Readable Recording Medium for Sensing Touch on Touch Panel. Filed January 14, 2013 and posted July 24, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=3825&p=77&f=G&l=50&d=PG01&S1=20140717.PD.&OS=PD/20140717&RS=PD/20140717

Keywords for this news article include: Patents.

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Source: Computer Weekly News


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