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Researchers Submit Patent Application, "Touch Display Device and Method of Manufacturing the Same", for Approval

July 16, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors KIM, Soo-Hwan (Gyeongsangbuk-do, KR); KWON, Keuk-Sang (Gyeongsangbuk-do, KR), filed on September 25, 2013, was made available online on July 3, 2014.

The patent's assignee is LG Display Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "The following description relates to a touch display device and method of manufacturing the same, and more particularly, to a touch display device and method of manufacturing the same, in which corrosion of touch lines of a touch panel is prevented.

"Recently, as the information age progresses, display devices processing and displaying a large amount of information have been rapidly developed. Specifically, various flat panel displays (FPDs) such as a liquid crystal display (LCD) device and an organic light emitting diode (OLED) display devices having a superior performance with a thin profile, a light weight, and a low power consumption have substituted for a cathode ray tube (CRT).

"A touch display device in which a command of a user is inputted by selecting a portion of an image has been widely used. The touch display device includes a display panel displaying the image and a touch panel in front of the display panel. In response to a person's finger or an object's contacting a portion of the touch panel, a contact position of the portion is converted into an electric signal. As a result, a content of the image corresponding to the contact position is provided as an input signal.

"FIG. 1 is a cross-sectional view showing a touch display device according to the related art.

"In FIG. 1, a touch display device includes a display panel 10, a touch panel 20 on the display panel 10, a cover glass 30 on the touch panel 20, an adhesive material layer 40 for attaching the display panel 10 and the touch panel 20, and an adhesive film 50 for attaching the touch panel 20 and the cover glass 30.

"For example, the display panel 10 may include a liquid crystal display (LCD) device or an organic light emitting diode (OLED) display device. The LCD device used as the display panel 10 may include a first substrate 12 having a thin film transistor (TFT) and a pixel electrode thereon, a second substrate 14 having a color filter layer and a common electrode thereon and a liquid crystal layer between the first and second substrates.

"The touch panel 20 includes a third substrate 21 having a first touch electrode 25 thereon, a fourth substrate 23 having a second touch electrode 27 thereon, and a dielectric layer 29 between the third and fourth substrates 21 and 23.

"The first and second touch electrodes 25 and 27 overlap each other with the dielectric layer 29 interposed therebetween to constitute a capacitor having a mutual capacitance. When an input means, such as a finger or a pen, contacts a portion of the touch panel 20, the mutual capacitance between the first and second touch electrodes 25 and 27 changes. Thereby, a position coordinate of the contact portion is obtained.

"However, since the touch display device having the touch panel 20 includes the third substrate 21 having the first touch electrode 25 and the fourth substrate 23 having the second touch electrode 27, a thickness and a fabrication cost of the touch display device increase. In addition, as the number of the substrates increases, transmittance of the touch display device is reduced."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "Accordingly, embodiments of the present application are directed to a touch display device and method of manufacturing the same that substantially obviates one or more of problems due to the limitations and disadvantages of the related art.

"An object of embodiments is to provide a touch display device where increase in thickness and fabrication cost and reduction in transmittance are prevented by changing the structure thereof.

"Advantages, objects, and features of the disclosure 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 the invention. The objectives and other advantages 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 objects and other advantages and in accordance with the purpose according to one aspect of the invention, there is provided a touch display device, includes: a display panel, an adhesive material layer on the display panel, a touch panel on the adhesive material layer, the touch panel including: a base film, a first touch electrode on a bottom surface of the base film, a second touch electrode on a top surface of the base film, and an insulating pattern at an edge portion of the bottom surface of the base film, and a cover glass on the touch panel.

"In another aspect, there is provided a method of forming a touch display device, the method including: forming a display panel; forming an adhesive material layer on the display panel; forming a touch panel on the adhesive material layer, the forming a touch panel comprising: forming a base film; forming a first touch electrode on a bottom surface of the base film; forming a second touch electrode on a top surface of the base film; and forming an insulating pattern at an edge portion of the bottom surface of the base film; and forming a cover glass on the touch panel.

"It is to be understood that both the foregoing general description and the following detailed description are examples and explanatory and are intended to provide further explanation of embodiments 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 specification, illustrate implementations of the invention and together with the description serve to explain the principles of the invention.

"FIG. 1 is a cross-sectional view showing a touch display device according to the related art.

"FIG. 2 is a cross-sectional view showing a touch display device according to an embodiment.

"FIG. 3 is a plan view showing a bottom surface of a touch panel of a touch display device according to an embodiment.

"FIG. 4 is a cross-sectional view showing a bonding structure of a touch panel of a touch display device according to an embodiment.

"FIG. 5 is a cross-sectional view showing a touch display device according to an embodiment.

"FIG. 6 is a plan view showing a bottom surface of a touch panel of a touch display device according to an embodiment.

"FIG. 7 is a cross-sectional view showing a bonding structure of a touch panel of a touch display device according to an embodiment.

"Throughout the drawings and the detailed description, unless otherwise described, the same drawing reference numerals should be understood to refer to the same elements, features, and structures. The relative size and depiction of these elements may be exaggerated for clarity, illustration, and convenience."

For additional information on this patent application, see: KIM, Soo-Hwan; KWON, Keuk-Sang. Touch Display Device and Method of Manufacturing the Same. Filed September 25, 2013 and posted July 3, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5211&p=105&f=G&l=50&d=PG01&S1=20140626.PD.&OS=PD/20140626&RS=PD/20140626

Keywords for this news article include: Electronics, LG Display Co. Ltd., Light-emitting Diode.

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Source: Electronics Newsweekly


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