News Column

"Display Device with Integrated Touch Screen and Method of Driving the Same" in Patent Application Approval Process

July 3, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- A patent application by the inventors KIM, Sung Chul (Goyang-si, KR); SEO, Seong Mo (Goyang-si, KR), filed on October 3, 2013, was made available online on June 19, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to Lg Display Co., Ltd.

The following quote was obtained by the news editors from the background information supplied by the inventors: "Embodiments of the present invention relate to a display device, and more particularly, to a display device with integrated touch screen.

"Touch screens are a type of input device that is included in image displaying devices such as Liquid Crystal Displays (LCDs), Field Emission Displays (FEDs), Plasma Display Panel (PDPs), Electroluminescent Displays (ELDs), and Electrophoretic Display (EPDs), and allows a user to input information by pressing or touching a touch sensor of a screen with a finger, a pen or the like while a user looks at the screen of the image displaying device.

"Recently, there is an increasing demand for a display device with integrated touch screen of in-cell type in which elements constituting the touch screen are provided inside the display device so as to realize slimness in mobile terminals such as smart phone and tablet PC.

"In case of a general in-cell type touch screen display, touch data is transmitted to a system once every one vertical sync signal Vsync to define one frame period. In this case, a frequency for transmitting new data to all pixels of a panel is referred to as a display frame rate. In the general in-cell type touch screen display, the touch data is transmitted once to the system every one vertical sync signal Vsync to define one frame period.

"Hereinafter, a driving method of a general display device with integrated touch screen of in-cell type will be described with reference to FIG. 1.

"FIG. 1 is a timing diagram illustrating signals of display time and touch time according to one vertical sync signal in a general display device with integrated touch screen.

"In case of a general display device with integrated self-capacitive touch screen of an in-cell type, as shown in FIG. 1, display time (D) and touch time (T) are time-divisionally driven according to a data enable DE signal during one frame based on one vertical sync signal."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "Accordingly, embodiments of the present invention are directed to a display device with integrated touch screen and a method of driving the same that substantially obviate one or more problems due to limitations and disadvantages of the related art.

"An aspect of embodiments of the present invention is directed to provide a display device with integrated touch screen, which facilitates to drive a display driving mode and a touch driving mode according to a horizontal sync signal, and a method of driving the same.

"Additional advantages and features of embodiments of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of embodiments of the invention. The objectives and other advantages of embodiments of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

"To achieve these and other advantages and in accordance with the purpose of embodiments of the invention, as embodied and broadly described herein, there is provided a display device with integrated touch screen that may include a panel including a plurality of electrodes; a data driver for converting RGB data inputted from a timing controller into a data voltage, and supplying the data voltage to data lines; a gate driver for sequentially supplying a gate signal to gate lines so as to apply the data voltage to pixels of the panel during a high logic period of a horizontal sync signal; and a touch IC for supplying the touch scan signal to the plurality of electrodes every low logic period of the horizontal sync signal, wherein the touch IC applies the touch scan signal, at least once, to each of the electrodes during one frame.

"In another aspect of an embodiment of the present invention, there is provided a method of driving a display device with integrated touch screen comprising a panel including a plurality of electrodes, a touch IC, a gate driver, and a data driver, that may include applying a data voltage to pixels of the panel during a high logic period of a horizontal sync signal by the gate driver and the data driver; and supplying the touch scan signal to the plurality of electrodes every low logic period of the horizontal sync signal by the touch IC wherein the step of applying the touch scan signal is carried out by applying the touch scan signal, at least once, to each of the electrodes during one frame.

"It is to be understood that both the foregoing general description and the following detailed description of embodiments of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

"The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

"FIG. 1 is a timing diagram illustrating signals of display time and touch time according to one vertical sync signal in a general display device with integrated touch screen;

"FIG. 2 illustrates a display device with integrated touch screen according to one embodiment of the present invention;

"FIG. 3 illustrates a panel and a touch IC in a display device with integrated touch screen according to one embodiment of the present invention;

"FIG. 4 illustrates a panel and a touch IC in a display device with integrated touch screen according to another embodiment of the present invention;

"FIG. 5 is a signal timing diagram illustrating a driving method according to one horizontal sync signal in a display device with integrated touch screen according to one embodiment of the present invention;

"FIG. 6 is a signal timing diagram illustrating another driving method according to one horizontal sync signal in a display device with integrated touch screen according to one embodiment of the present invention; and

"FIG. 7 is a signal timing diagram illustrating another driving method according to one horizontal sync signal in a display device with integrated touch screen according to one embodiment of the present invention."

URL and more information on this patent application, see: KIM, Sung Chul; SEO, Seong Mo. Display Device with Integrated Touch Screen and Method of Driving the Same. Filed October 3, 2013 and posted June 19, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5209&p=105&f=G&l=50&d=PG01&S1=20140612.PD.&OS=PD/20140612&RS=PD/20140612

Keywords for this news article include: Lg Display Co. Ltd.

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


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Source: Politics & Government Week


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