News Column

Patent Issued for Touch Pad and Electronic Device Having the Same

June 25, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- Samsung Electronics Co., Ltd (Suwon-si, KR) has been issued patent number 8749509, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Yoon, Woon-sang (Seoul, KR); Kim, Do-kyum (Suwon-si, KR).

This patent was filed on December 19, 2012 and was published online on June 10, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "The present general inventive concept relates to an input device of an electronic device, such as a printer, a copier, a multi-function machine, a portable terminal, etc. More particularly, the present general inventive concept relates to a touch pad and an electronic device having the touch pad.

"Input devices of electronic devices, such as printers, copiers, multi-function machines, portable terminals, etc., have rapidly changed from being button-based to being touch-based. Touch pads, as an example of touch-based input devices of electronic devices, allow products to be manufactured more slimly, as well as having a diverse range of simple exteriors. Accordingly, touch pads are being increasingly used in electronic devices.

"FIG. 1 is an exemplary view schematically illustrating a conventional touch pad used in a conventional electronic device. In FIG. 1, the conventional touch pad includes a cover 1 and a first board 2, which is placed under the cover 1, and comprises a printed circuit board (PCB) or a flexible printed circuit (FPC). A touch sensor 3 is mounted on the first board 2. A second board 4 is spaced away from the first board 2 at a predetermined distance, and includes a light emitting diode (LED) 5 mounted thereon to illuminate the upper side of the second board 4. Additionally, a LED holder 6 and a diffusion sheet 7 are placed adjacent to the LED 5. The LED holder 6 and diffusion sheet 7 are used to diffuse light emitted from the LED 5.

"In the conventional touch pad, as constructed above, light emitted from the LED 5 is diffused to the first board 2 and illuminates the first board 2, and accordingly function selection icons may be displayed so that a user may recognize the icons and touch an icon indicating a desired function in order to select the desired function.

"However, the conventional touch pad as constructed above requires the first board 2 including the touch sensor 3 mounted thereon, and the second board 4 including the LED 5 mounted thereon, so the structure is complicated. Additionally, since the LED holder 6 and diffusion sheet 7, which are required to diffuse light, are placed between the first and second boards 2 and 4, it is difficult to manufacture the touch pad with a slim design, and manufacturing costs may increase."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "The present general inventive concept provides a touch pad with a simplified structure and reduced manufacturing costs by mounting components on a single board and forming an LED integrally with a cover frame.

"The present general inventive concept also provides an electronic device which is made slimmer and has an improved external design by including the above-described touch pad.

"Additional aspects and utilities of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.

"The foregoing and/or other aspects and utilities of the present general inventive concept are achieved by providing a touch pad including a cover including a plurality of function icons, a cover frame to support the cover, the cover frame including a plurality of light guide hollows, and a board, which is engaged with the cover frame and includes touch sensors and luminous elements to illuminate the function icons mounted thereon. The touch sensors and luminous elements may be respectively mounted at positions on the board corresponding to the plurality of function icons.

"The cover may include a transparent polycarbonate sheet or an acryl sheet.

"The cover may include a transparent polycarbonate sheet, a function icon film which is printed on a rear surface of the polycarbonate sheet, and a diffusion silk film, which is printed on the function icon film, to diffuse light emitted from the luminous elements.

"The light guide hollows may have a funnel shape in which a diameter of each of the light guide hollows increases from a bottom portion of the light guide hollows to a top portion of each of the light guide hollows.

"The touch pad may further include a double-sided adhesive tape to form a secure connection between the cover frame and the board and to prevent air from entering between the cover frame and the board.

"A transparent double-sided adhesive tape may be used, or a semi-transparent (or faintly visible) double-sided adhesive tape including a plurality of holes formed at positions corresponding to the respective light guide hollows of the cover frame may be used.

"Each luminous element may include a light emitting diode (LED).

"The foregoing and/or other aspects and utilities of the present general inventive concept may also be achieved by providing an electronic device including a main body, and an input device which is placed on one side of an upper surface or a side surface of the main body. The input device may include a touch pad as described above.

"The main body may include a first body and a second body which is pivotably mounted on the first body, and which is capable of being opened and closed about the first body.

"The foregoing and/or other aspects and utilities of the present general inventive concept may also be achieved by providing an image forming apparatus included in an electronic apparatus, the image forming apparatus including a first body housing a feeding unit, a developing unit and a fixing unit, a second body, which is pivotably mounted on the first body, and which is capable of being opened and closed about the first body, the second body including an exposure unit and a scanning unit, a cover unit, which is mounted on the second body to cover the scanning unit, and a touch pad as described above as an input device which is placed on one side of an upper surface of the second body.

"The foregoing and/or other aspects and utilities of the present general inventive concept may also be achieved by providing a touch pad, including a cover including a plurality of icons, and a circuit board to connect to the cover, the circuit board including a plurality of touch sensors corresponding to the plurality of icons, and a plurality of luminous elements to illuminate the icons.

"The touch pad may further include a cover frame mounted between the cover and the circuit board, the cover frame including a plurality of light guide hollows corresponding to the plurality of luminous elements.

"The cover frame may be securely fastened to the circuit board to prevent air bubbles from forming between the cover frame and the circuit board.

"The cover may include a diffusion silk film to diffuse light emitted from the plurality of luminous elements.

"The foregoing and/or other aspects and utilities of the present general inventive concept may also be achieved by providing an image forming apparatus to perform various image forming operations, the image forming apparatus including a casing, an image forming unit to form an electrostatic latent image on a printing medium, a developing unit to apply toner to the printing medium to correspond to the electrostatic latent image, a fixing unit to fix the toner onto the printing medium, and an input unit coupled to the casing to input specific commands corresponding to the various image forming operations of the image forming apparatus, the input unit including a touch pad, including, a cover comprising a plurality of icons, and a circuit board to connect to the cover, the circuit board including a plurality of touch sensors corresponding to the plurality of icons, and a plurality of luminous elements to illuminate the icons.

"The image forming apparatus may further including scanner to scan and save an image from a printing medium to a storage unit, and a photo-copying unit to photo-copy an image onto a printing medium."

For the URL and additional information on this patent, see: Yoon, Woon-sang; Kim, Do-kyum. Touch Pad and Electronic Device Having the Same. U.S. Patent Number 8749509, filed December 19, 2012, and published online on June 10, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8749509.PN.&OS=PN/8749509RS=PN/8749509

Keywords for this news article include: Circuit Board, Light-emitting Diode, Samsung Electronics 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: Electronics Newsweekly


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