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Patent Issued for Touch Position Detection Apparatus and Method Using Multistage Scan

February 26, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Alexandria, Virginia, VerticalNews journalists report that a patent by the inventors Lin, Ar-Jann (Zhongli, TW); Pan, Wen-Chieh (New Taipei, TW), filed on May 30, 2013, was published online on February 11, 2014.

The patent's assignee for patent number 8648831 is Tu; Yen-Hung (Taipei, TW).

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates to an apparatus and method for a touch display module, especially to a touch position detection apparatus and method using multistage scan for a touch display module.

"As is well known, a common touch display module scans an X-Y array with a fixed frequency--for example, selecting one from a plurality of Y scan lines in turn to connect to a power supply, and selecting one from a plurality of X scan lines in turn to receive an analog sensor signal--to detect a touch position. However, when the size of the touch display module is large, that is, when the number of Y scan lines and X scan lines is large, the traditional X-Y array scan method proves inefficient--the number of pins of related control IC increases phenomenally, and the display picture of the touch display module is subject to the interference of the fixed frequency touch scan.

"To solve the mentioned problems of the touch display module, the present invention proposes a novel touch position detection mechanism, which utilizes a multistage scan methodology to detect a touch position."

As a supplement to the background information on this patent, VerticalNews correspondents also obtained the inventors' summary information for this patent: "One objective of the present invention is to disclose a touch position detection apparatus using multistage scan, to increase the touch position detection efficiency, lower the operation power consumption, decrease the number of pins of the control IC, reduce electromagnetic interference, and prevent interfering the display picture.

"Another objective of the present invention is to disclose a touch position detection method using multistage scan, to increase the touch position detection efficiency, lower the operation power consumption, decrease the number of pins of the control IC, reduce electromagnetic interference, and prevent interfering the display picture.

"To attain the foregoing objectives, a touch position detection apparatus using multistage scan is disclosed, the apparatus including a scan lines connection circuit, a touch scan unit, and a touch coordinate decision unit.

"The scan lines connection circuit is used to control the connection configuration between a first group of scan lines and a second group of scan lines according to a scan lines connection control signal, to form an equivalent resolution distribution of a sensor device, wherein the second group of scan lines is coupled with the sensor device.

"The touch scan unit is used to select a portion of the first group of scan lines according to a resolution programming signal to detect an interim touch coordinate, and deliver the interim touch coordinate through a first coordinate signal.

"The touch coordinate decision unit has a plurality of operation stages, and is used to: determine the status of the scan lines connection control signal and the status of the resolution programming signal according to the operation stages; receive a plurality of the interim touch coordinates detected in the operation stages through the first coordinate signal; and sum up the interim coordinates.

"To attain the foregoing objectives, another touch position detection apparatus using multistage scan is proposed, the apparatus including a scan lines combination circuit, a scan lines connection circuit, a touch scan unit, and a touch coordinate decision unit.

"The scan lines combination circuit is used to select a portion of a third group of scan lines to connect with a second group of scan lines according to a scan lines combination circuit control signal, to locate a touched sub area of a sensor device, wherein the third group of scan lines is coupled with the sensor device.

"The scan lines connection circuit is used to control the connection configuration between a first group of scan lines and the second group of scan lines according to a scan lines connection control signal, to form an equivalent resolution distribution of the touched sub area.

"The touch scan unit is used to select a portion of the first group of scan lines to detect an interim touch coordinate, and deliver the interim touch coordinate through a first coordinate signal.

"The touch coordinate decision unit has a scan lines combination circuit operation stage and a sub area scan stage, wherein the sub area scan stage has a plurality of operation stages. The touch coordinate decision unit is used to: determine the status of the scan lines combination circuit control signal and derive a touched sub area coordinate when in the scan lines combination circuit operation stage; determine the status of the scan lines connection control signal and the status of the resolution programming signal, and receive a plurality of the interim touch coordinates from the first coordinate signal according to the operation stages when in the sub area scan stage; and sum up the touched sub area coordinate and the interim coordinates.

"To attain the foregoing objectives, a touch position detection method using multistage scan is proposed, the method including the following steps:

"Detect a first coordinate of a touch event of a sensor device with a first equivalent resolution distribution (step a).

"Detect a second coordinate of the touch event of the sensor device with a second equivalent resolution distribution (step b).

"Sum up the first coordinate and the second coordinate (step c).

"To attain the foregoing objectives, another touch position detection method using multistage scan is proposed, the method including the following steps:

"Scan a sensor device to find a touched sub area from a set of sub areas of the sensor device, wherein the touched sub area has a sub area coordinate (step a).

"Detect a first coordinate of a touch event of the touched sub area with a first equivalent resolution distribution (step b).

"Detect a second coordinate of the touch event of the touched sub area with a second equivalent resolution distribution (step c).

"Sum up the sub area coordinate, the first coordinate, and the second coordinate.

"To make it easier for our examiner to understand the objective of the invention, its structure, innovative features, and performance, we use preferred embodiments together with the accompanying drawings for the detailed description of the invention."

For additional information on this patent, see: Lin, Ar-Jann; Pan, Wen-Chieh. Touch Position Detection Apparatus and Method Using Multistage Scan. U.S. Patent Number 8648831, filed May 30, 2013, and published online on February 11, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=46&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=2260&f=G&l=50&co1=AND&d=PTXT&s1=20140211.PD.&OS=ISD/20140211&RS=ISD/20140211

Keywords for this news article include: Patents, Electronics, Electromagnet.

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Source: Electronics Newsweekly


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