News Column

Researchers Submit Patent Application, "System and Method Using Detectable Signals of Panel for Data Communication", for Approval

August 14, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors LIANG, Chih-Hao (Hsinchu City, TW); LIU, Cheng-Chiang (Hsinchu County, TW), filed on June 25, 2013, was made available online on July 31, 2014.

No assignee for this patent application has been made.

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates to the technical field of display panels and, more particularly, to a system and method using detectable signals of panel for data communication.

"Current consumer electronics are typically provided with a touchpad as one of the input devices. To meet with the requirements of being light, thin, short, and small, a touchpad and a panel are combined into a touch panel for a user to conveniently input data.

"Upon the sensing principle, touchpads are divided into four types: resistive type, capacitive type, surface acoustic wave type, and optics type. The operation principle of touch panels is to sense a voltage, a current, an acoustic wave or an infrared when a finger or other medium touches on a touch screen, so as to detect the coordinates of touching points. For example, a resistive touch panel uses the voltage difference between upper and lower electrodes to determine the location where a force is applied, to thereby detect the touching point. A capacitive touch panel uses the current or the voltage originated from capacitance changes in a static electricity combination of transparent electrodes in row and column with human body to detect the touching coordinate.

"FIG. 1 is a schematic view of driving a typical capacitive touch panel, which is an nxm touch panel 120, where n, m are each an integer greater than one. As shown in FIG. 1, a controller 110 sequentially generates a driving signal Vin at the conductor lines X1-Xn in one direction for coupling charges into the conductor lines Y1-Ym through mutual capacitance between the conductor lines X1-Xn and the conductor lines Y1-Ym in the other direction. The controller 110 has m sensors (not shown) to measure the charges for further generating the voltage signals.

"FIG. 2 schematically illustrates the structure of a typical capacitive touch panel. As shown in FIGS. 1 and 2, the conductor lines X1-Xn and Y1-Ym are comprised of diamond sensing conductors 121-124, and the mutual capacitance 201-204 is generated between the diamond sensing conductors 121-124. Instead of being physical capacitors, the mutual capacitance 201-204 is mutually induced by the diamond sensing conductors 121-124.

"FIGS. 3 and 4 are schematic views of a typical capacitive touch panel without and with an approaching finger. As shown in FIG. 3, when there is no grounded conductor or finger approaching to the touch panel 120, the mutual capacitance C.sub.(x,y) equals to Cm0. As shown in FIG. 4, when a grounded conductor or a finger approaches to the touch panel, the electrical power lines between the conductor lines X1-Xn and Y1-Ym are interfered and reduced, so as to affect the value of the mutual capacitance, which is assumed to be, for example, Cm1 when there is a touch. The sensors make use of the change of the mutual capacitance to measure the charges and further generate the voltage signals.

"With reference to FIGS. 1, 3, and 4, when the finger approaches to an area comprised of the sensing conductors 121-124 of the touch panel, the controller 110 generates the driving signal Vin on the conductor line X2. At first, there is no finger or grounded conductor at the intersection of the conductor lines X2 and Y1, so that the controller 110 can detect a high potential. Next, when there is a finger or a grounded conductor at the intersection of the conductor lines X2 and Y2, a virtual grounded signal at the intersection is detected to thereby reduce the power lines. In this case, the controller 110 can detect a low potential, i.e., the controller 110 can detect a touch point positioned at the intersection of the conductor lines X2 and Y2. It is noted that, instead of directly touching the conductor lines, the finger or grounded conductor touches the conductor lines via a cover of lens. Similarly, when there is no finger or grounded conductor at the intersection of the conductor lines X2 and Y3, the controller 110 can detect a high potential. Accordingly, multiple touch points on the touch panel can be detected.

"With popular smart phones and tablet PCs, they are mostly equipped with a multi-touch screen. In addition, a smart phone or tablet PC is always connected with the peripherals through the interfaces of USB, SD, Bluetooth, and the like. However, the handheld devices with a touch screen do not use the features of the touch screen to transfer data. In addition, a typical liquid crystal display (LCD) panel and cathode ray tube (CRT) screen do not have the techniques associated with data transfer using the screen features. Therefore, it is desirable to provide an improved handheld system with a touch screen to mitigate and/or obviate the afore-mentioned problems."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "The object of the present invention is to provide a system and method using detectable signals of panel for data communication.

"In one aspect of the present invention, there is provided a system using detectable signals of panel for data communication, which includes the panel, at least one detectable signal detector, and a control unit. The panel has a surface for displaying an image. At least one area of the surface is used to display variation of a detectable signal. The at least one detectable signal detector is coupled to the at least one area for detecting the variation of the detectable signal in the at least one area and producing a corresponding detection signal. The control unit is connected to the at least one detectable signal detector for receiving the detection signal which represents a data state. Thus, the control unit can obtain the data state sent from the at least one area.

"In another aspect of the present invention, there is provided a method using detectable signals of panel for data communication applied in a panel including a surface for displaying an image, at least one detectable signal detector coupled to at least one area of the surface, and a control unit connected to the at least one detectable signal detector. The method includes the steps of: (A) displaying variation of a detectable signal in the at least one area of the surface; (B) using the at least one detectable signal detector to detect the variation of the detectable signal in the at least one area, thereby producing a corresponding detection signal; and (C) using the control unit to receive the detection signal which represents a corresponding data state, thereby obtaining the data state sent from the at least one area.

"Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 is a schematic view of driving a typical capacitive touch panel;

"FIG. 2 schematically illustrates the structure of a typical capacitive touch panel;

"FIG. 3 is a schematic view of a typical capacitive touch panel without an approaching finger;

"FIG. 4 is a schematic view of a typical capacitive touch panel with an approaching finger;

"FIG. 5 is a schematic view of a system using detectable signals of panel for data communication according to an embodiment of the present invention;

"FIG. 6 is a schematic view of another embodiment according to the invention;

"FIG. 7 is a schematic view of still another embodiment according to the invention;

"FIG. 8 is a schematic view of further another embodiment according to the invention;

"FIG. 9 is a flowchart of a method using detectable signals of panel for data communication according to the invention;

"FIG. 10 is a detailed flowchart of step (C) in the method using detectable signals of panel for data communication according to the invention; and

"FIGS. 11 and 12 are schematic diagrams of packet formats according to the invention."

For additional information on this patent application, see: LIANG, Chih-Hao; LIU, Cheng-Chiang. System and Method Using Detectable Signals of Panel for Data Communication. Filed June 25, 2013 and posted July 31, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4423&p=89&f=G&l=50&d=PG01&S1=20140724.PD.&OS=PD/20140724&RS=PD/20140724

Keywords for this news article include: Patents.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Politics & Government Week


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters