Patents Assigned to LS Tech Co., Ltd.
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Patent number: 8592718Abstract: An apparatus for forming a pattern using a laser is provided. The apparatus includes a pattern storing unit, a controller, a laser oscillating unit, an X-Y driver, a header unit, and a stage. The pattern storing unit stores data on light guide patterns of a discontinuous straight line shape. The controller transmits position signal of the light guide patterns to the X-Y driver and simultaneously, transmits a switching signal to the laser oscillating unit. The laser oscillating unit outputs a laser beam synchronized with a movement of the header unit. The X-Y driver moves the header unit and the stage. The header unit moves along a first guide rail. The stage moves along a fixed second guide rail in the front and rear direction of the light guide panel.Type: GrantFiled: July 12, 2010Date of Patent: November 26, 2013Assignee: LS Tech Co., Ltd.Inventors: Deukil Park, Choongyop Rhew, Daisoung Park, Wonmyeong Kang
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Patent number: 8278596Abstract: An apparatus for forming a pattern using a laser is provided. The apparatus includes a pattern storing unit, a controller, a laser oscillating unit, an X-Y driver, a header unit, and a stage. The pattern storing unit stores data on light guide patterns of a discontinuous straight line shape. The controller transmits position signal of the light guide patterns to the X-Y driver and simultaneously, transmits a switching signal to the laser oscillating unit. The laser oscillating unit outputs a laser beam synchronized with a movement of the header unit. The X-Y driver moves the header unit and the stage. The header unit moves along a first guide rail. The stage moves along a fixed second guide rail in the front and rear direction of the light guide panel.Type: GrantFiled: July 12, 2010Date of Patent: October 2, 2012Assignee: LS Tech Co., Ltd.Inventors: Deukil Park, Choongyop Rhew, Daisoung Park, Wonmyeong Kang
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Patent number: 8247736Abstract: An apparatus for forming a pattern is provided. The apparatus includes a pattern storing unit, a controller, a laser oscillating unit, an X-Y driver, a header unit, and a stage. The pattern storing unit stores data on a light guide pattern. The controller reads out the data on the light guide pattern, and transmits a position signal of each light guide pattern to the X-Y driver and simultaneously, transmits a switching signal to the laser oscillating unit. The laser oscillating unit outputs a laser beam synchronized with a movement of a header unit. The X-Y driver moves the header unit and the stage. The header unit moves along a fixed first guide rail in the left and right direction of the light guide panel. The stage moves along a fixed second guide rail in the front and rear direction of the light guide panel.Type: GrantFiled: July 12, 2010Date of Patent: August 21, 2012Assignee: LS Tech Co., Ltd.Inventors: Deukil Park, Choongyop Rhew, Daisoung Park, Wonmyeong Kang
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Publication number: 20110013168Abstract: A pattern forming apparatus for a light guide panel is provided. The apparatus may include a pattern design system, a control system, a header moving unit including an XY moving unit and a header unit, a laser system, beam splitters, and an optical unit. The pattern design system may have an input of data on a pattern. The control system may connect with the pattern design system and transmits a position signal. The XY moving unit may mechanically move up/down and left/right in response to the position signal. The header unit may be coupled with the XY moving unit and reflects a scanned laser beam. The laser system may output a laser beam by a pulse signal. The beam splitters may split a laser beam into two or more laser beams. The optical unit may reflect and collect the two or more laser beams.Type: ApplicationFiled: April 10, 2008Publication date: January 20, 2011Applicant: LS Tech, Co., Ltd.Inventors: Deukil Park, Choongyop Rhew, Kiyong Baek, Daisoung Park
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Publication number: 20110011840Abstract: A pattern forming apparatus for a light guide panel is provided. The apparatus includes a pattern design system, a control system, a header moving unit including an XY moving unit and a header unit, one or more laser systems, and two or more optical units. The pattern design system has an input of data on a pattern. The control system connects with the pattern design system and transmits a position signal. The XY moving unit mechanically moves up/down and left/right in response to the position signal. The header unit is coupled with the XY moving unit and reflects a scanned laser beam. The laser systems output laser beams by a pulse signal. The optical units each reflect and collect the laser beams.Type: ApplicationFiled: April 25, 2008Publication date: January 20, 2011Applicant: LS TECH Co., Ltd.Inventors: Deukil Park, Choongyop Rhew, Kiyong Baek, Daisoung Park
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Patent number: 7736042Abstract: Provided is a back light unit. The back light unit includes a light guide plate having a light guide pattern part; at least one light emitting unit provided at a sidewall of the light guide plate, and irradiating light to the light guide plate; a keypad positioned over the light guide plate, and comprising a resin layer, a base resin layer, a character opening part having a character shape, a key assembly provided at one side, and a key adherence film provided on an upper surface of the base resin layer; and a printed circuit board comprising a metal dome switch positioned under a lower surface of the light guide plate.Type: GrantFiled: February 20, 2007Date of Patent: June 15, 2010Assignee: LS Tech Co., Ltd.Inventors: Deuk II Park, Choong Yop Rhew, Ki Yong Balk, Young Jin Hyun, Jun Kyu Lee, Hyun Jung Cho, Kyu Jin Choi
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Patent number: 7471037Abstract: A flat fluorescent lamp with discharge uniformity is provided. The lamp includes a first substrate and a second substrate having discharge electrodes; a sidewall corresponding to a frame of any one of the two substrates; and a plurality of serpentine shaped discharge channels defined by the sidewall, first barrier ribs, and second barrier ribs, and having serpentine shaped widths corresponding to horizontal pitches between the left/right sidewall and the first barrier rib and between the first barrier ribs, and having discharge channel widths corresponding to vertical pitches between the second barrier ribs, wherein the serpentine shaped discharge channel is varied in length depending on its position within the flat fluorescent lamp.Type: GrantFiled: December 13, 2005Date of Patent: December 30, 2008Assignee: LS Tech Co., Ltd.Inventors: Deuk Il Park, Choong Yop Rhew, Young Jin Hyun
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Patent number: 7364337Abstract: Provided is a backlight unit for a key of an input device. The unit includes a light guide plate and at least one light emitting unit. The light guide plate is formed of flexible transparent resin and has a light guide pattern portion in which a plurality of engraved or embossed patterns are formed in a plurality of requirement character shapes so that light can be diffused and scattered at desired luminance from a necessary light emitting portion, using a minimal number of light sources. The light emitting unit is installed at a side wall of the light guide plate.Type: GrantFiled: April 19, 2006Date of Patent: April 29, 2008Assignee: LS Tech Co. Ltd.Inventor: Hong Jin Park
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Patent number: 7364339Abstract: Provided is a backlight unit for a key of an input device. The unit includes a light guide plate and at least one light emitting unit. The light guide plate is formed of flexible transparent resin and has a light guide pattern portion in which a plurality of engraved patterns are formed in a plurality of requirement character shapes so that light can be diffused and scattered at desired luminance from a necessary light emitting portion, using a minimal number of light sources. The light emitting unit is installed at a side wall of the light guide plate.Type: GrantFiled: April 14, 2006Date of Patent: April 29, 2008Assignee: LS Tech Co. Ltd.Inventor: Hong jin Park
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Patent number: 7259518Abstract: The present invention discloses a flat fluorescent lamp which improves discharge efficiency and luminance with an increase of a current density per discharge channel by forming multiple discharge channels of an independent serpentine layout and an exhaust channel and minimizes non-light emitting regions caused from the external electrode. The flat fluorescent lamp comprises: side walls for forming closed spaces between a front substrate and a rear substrate; partitions formed on the rear substrate and for forming multiple discharge channels of an independent serpentine layout; an exhaust channel formed on the rear substrate, connected to the respective discharge channels and used for vacuum exhaustion or discharge gas injection; and discharge electrodes arranged on both opposite ends of the starting and ending points of the multiple discharge channels of an independent serpentine layout and for discharging the discharge channels in parallel.Type: GrantFiled: October 13, 2004Date of Patent: August 21, 2007Assignee: LS Tech Co. Ltd.Inventors: Deuk Il Park, Choong-Yop Rhew
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Patent number: 7215079Abstract: A flat fluorescent lamp has a uniform screen brightness even with a low discharge initiating voltage. A backlight unit using the flat fluorescent lamp is provided. The flat fluorescent lamp includes a front substrate, a back substrate having a continuous serpentine type discharge channel defined by a plurality of partitions extending alternately from both side ends of the back substrate. An inverter and a pair of electrodes provided on one of the front and the back substrates apply power to the electrodes. Each of the electrodes includes discharge electrodes mounted in strip configurations and a plurality of subsidiary electrodes that are mounted to extend perpendicularly from the discharge electrodes and to correspond to positions of the partitions. The plurality of subsidiary electrodes are alternately connected to inner edges of both the discharge electrodes so that neighboring subsidiary electrodes have different polarities.Type: GrantFiled: March 29, 2004Date of Patent: May 8, 2007Assignee: LS Tech Co., Ltd.Inventors: Deuk Il Park, Choong Yop Rhew
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Patent number: 7042167Abstract: Disclosed herein is a back light device for LCDs. The back light device includes an inverter to supply an alternating current or a pulse, a plurality of fluorescent lamps to radiate visible light, a reflection member to reflect the light radiated from the fluorescent lamps, a diffusion member to diffuse the light, and a frame to house the above elements therein. An external electrode is provided at a first end of each of the fluorescent lamps, and an internal electrode is provided at a second end of each of the fluorescent lamps. An extension electrode is provided on an outer surface of the second end of each of the fluorescent lamps to be connected to an associated internal electrode. A holding terminal is provided at each of both ends of each fluorescent lamp to connect the external and extension electrodes to each other. Further, an inverter is provided to operate the fluorescent lamps.Type: GrantFiled: March 29, 2004Date of Patent: May 9, 2006Assignee: LS Tech Co., Ltd.Inventors: Deuk Il Park, Choong Yop Rhew
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Patent number: 6960891Abstract: The object of this invention is to provide a direct-type back light device, capable of maintaining uniform luminance, and reducing manufacturing costs and power consumption, in addition to being easy to assemble and to accomplish thinness. The back light device includes a frame, a diffusion member provided in an upper portion of the frame to diffuse light, a plurality of fluorescent lamps provided under the diffusion member to radiate the light, a reflection member provided under the plurality of fluorescent lamps to reflect the light radiated from the fluorescent lamps, a lamp holder to hold each of the plurality of fluorescent lamps, an inverter to turn on or off the plurality of fluorescent lamps, and a capacitive circuit element and an insulator provided on first and second ends of the fluorescent lamps, respectively, to connect the plurality of the fluorescent lamps to the inverter in parallel with each other.Type: GrantFiled: March 29, 2004Date of Patent: November 1, 2005Assignee: LS Tech Co., LTDInventors: Deuk Il Park, Choong Yop Rhew
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Publication number: 20050036320Abstract: An apparatus for manufacturing a surface light source apparatus in which a light guide pattern portion is formed on a light guide panel includes a pattern design system to which data about a pattern to be formed on the light guide pattern is input. A control system is connected to the pattern design system and transmits a position signal matching a coordinate value of each pattern to be formed on the light guide panel. A header moving portion mechanically moves vertically and horizontally according to the position signal received from the control system. A laser system outputs a laser beam according to a pulse signal synchronized with a movement of the header moving portion. A lens portion allows a laser beam output from the laser system to pass the header moving portion and to be focused on a scanning surface of the light guide panel. A warp prevention unit prevents the light guide panel from warping due to a local heating by the laser beam.Type: ApplicationFiled: September 3, 2004Publication date: February 17, 2005Applicant: LS TECH CO., LTD.Inventors: Deuk Park, Soon Cho, Sang Kim, Ok Sur, Choong Rhew, Min Kim, Chi Jo, Sung Zoo
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Patent number: 6843587Abstract: An apparatus for manufacturing a surface light source apparatus in which a light guide pattern portion is formed on a light guide panel includes a pattern design system to which data about a pattern to be formed on the light guide pattern is input. A control system is connected to the pattern design system and transmits a position signal matching a coordinate value of each pattern to be formed on the light guide panel. A header moving portion mechanically moves vertically and horizontally according to the position signal received from the control system. A laser system outputs a laser beam according to a pulse signal synchronized with a movement of the header moving portion. A lens portion allows a laser beam output from the laser system to pass the header moving portion and to be focused on a scanning surface of the light guide panel. A warp prevention unit prevents the light guide panel from warping due to a local heating by the laser beam.Type: GrantFiled: April 21, 2003Date of Patent: January 18, 2005Assignee: LS Tech Co., Ltd.Inventors: Deuk Il Park, Soon Cheon Cho, Sang Mook Kim, Ok Bin Sur, Choong Yop Rhew, Min Ho Kim, Chi Un Jo, Sung Su Zoo
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Publication number: 20030210539Abstract: An apparatus for manufacturing a surface light source apparatus in which a light guide pattern portion is formed on a light guide panel includes a pattern design system to which data about a pattern to be formed on the light guide pattern is input. A control system is connected to the pattern design system and transmits a position signal matching a coordinate value of each pattern to be formed on the light guide panel. A header moving portion mechanically moves vertically and horizontally according to the position signal received from the control system. A laser system outputs a laser beam according to a pulse signal synchronized with a movement of the header moving portion. A lens portion allows a laser beam output from the laser system to pass the header moving portion and to be focused on a scanning surface of the light guide panel. A warp prevention unit prevents the light guide panel from warping due to a local heating by the laser beam.Type: ApplicationFiled: April 21, 2003Publication date: November 13, 2003Applicant: LS TECH CO., LTD.Inventors: Duek IL Park, Soon Cheon Cho, Sang Mook Kim, Ok Bin Sur, Choong Yop Rhew, Min Ho Kim, Chi Un Jo, Sung Su Zoo