Patents Examined by Yong Sim
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Patent number: 7602370Abstract: A liquid crystal display device of the present invention is configured of a liquid crystal display unit for displaying an image, a backlight unit controllable for each color that radiates light at the liquid crystal display unit, a display controller for controlling a display of the liquid crystal display unit, and an emission control circuit for controlling an emission of the each color of the backlight unit, wherein the emission control circuit performs control so that emission start timing and emission end timing in a sequential emission period of the each color of the backlight unit match in all colors.Type: GrantFiled: November 9, 2004Date of Patent: October 13, 2009Assignee: Hitachi Displays, Ltd.Inventors: Tsunenori Yamamoto, Daisuke Kajita, Ikuo Hiyama
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Patent number: 7567229Abstract: The invention provides an electro-optical device that stabilizes display quality by performing correction processing corresponding to a plurality of disturbance factors. Specifically, a grayscale characteristic generating unit can generate conversion data having grayscale characteristics obtained by changing the grayscale characteristics of display data that defines the grayscales of pixels with reference to a conversion table whose description contents include correction factors. A data line driving circuit can drive the pixels after correcting the grayscale characteristics of the conversion data by the correction factors using other processing different from the that performed by the grayscale characteristic generating unit.Type: GrantFiled: May 21, 2004Date of Patent: July 28, 2009Assignee: Seiko Epson CorporationInventors: Toshiyuki Kasai, Yoichi Imamura
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Patent number: 7532175Abstract: A head-up display device includes a display unit for displaying information, a reflector rotatably supported by frame members fixed to a vehicle, and an adjuster for adjusting a rotational position of the reflector by a gearing system. The information displayed on the display unit is reflected by the reflector to a projection area on a vehicle windshield. The adjuster so adjusts the rotational position to allow a vehicle driver to see both a front view through the windshield and a superimposed reflected image of the information. The head-up display device further includes a regulator to allow the reflector to rotate in a rotational direction within a range where the reflector is adjustable by the adjuster, and to prevent the reflector from shifting in a direction other than the rotational direction.Type: GrantFiled: December 1, 2004Date of Patent: May 12, 2009Assignee: Yazaki CorporationInventors: Kunimitsu Aoki, Go Nakamura, Yoshihide Takada
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Patent number: 7532185Abstract: The present invention is directed to an apparatus of driving a liquid crystal display device including a plurality of pixels. The driving apparatus includes a gray voltage generator for generating a plurality of gray voltages, an image signal driver for selecting gray voltages corresponding to color signals and applying the selected gray voltages as image signal voltages to the pixels, and a signal controller for controlling the image signal driver based on the color signals and input control signals for controlling the color signals. At least two successive first gray voltages among the plurality of gray voltages are variable and at least two successive second gray voltages among the plurality of gray voltages are fixed.Type: GrantFiled: July 30, 2002Date of Patent: May 12, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Chang-Hun Lee, Young-Chol Yang, Hak-Sun Chang
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Patent number: 7525559Abstract: An evaluation apparatus of a liquid crystal display device in accordance with the present invention is provided with a signal section for supplying a signal to a liquid crystal panel to be evaluated; a display detection section for sensing a display state on the liquid crystal panel; an analysis section for analyzing a detection result of the display detection section. The signal section supplies to the liquid crystal panel a signal corresponding to an original tone and then, in accordance with tone transition from the original tone to an attainment tone, either (i) an overshoot test signal or (ii) both an overshoot test signal and an undershoot test signal in test driving, while sweeping either a level of the signal (i) or levels of both the signals (ii).Type: GrantFiled: February 9, 2004Date of Patent: April 28, 2009Assignee: Sharp Kabushiki KaishaInventors: Tomoo Furukawa, Makoto Shiomi, Mitsuhiro Shigeta
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Patent number: 7515133Abstract: A display device for a vehicle includes a liquid crystal display (LCD), a panel heater, and a display control circuit. The LCD has a LCD panel and the panel heater is attached to a front of the LCD panel. The display control circuit detects the current time and determines whether the current time is five minutes ahead of a scheduled start time stored in a memory. If so, the display control circuit starts driving the panel heater for warming up the LCD to a proper temperature for providing clear images by the scheduled start time.Type: GrantFiled: June 29, 2004Date of Patent: April 7, 2009Assignee: DENSO CORPORATIONInventor: Tomohide Usami
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Patent number: 7505030Abstract: A device is disclosed that includes an interface member including a material and a manipulandum movable in a degree of freedom. The manipulandum is able to penetrate the material. A sensor is configured to output a position signal based on the position of the manipulandum. An actuator is configured to output haptic feedback by applying a compressive force to the material based on the position signal. In other embodiments, a method is disclosed that includes receiving a position signal associated with a position of a manipulandum, where at least a portion of the manipulandum penetrates the interface material. Haptic feedback is output by varying a density of the interface material based on the position signal.Type: GrantFiled: March 18, 2004Date of Patent: March 17, 2009Assignee: Immersion Medical, Inc.Inventors: Richard L. Cunningham, Robert Cohen
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Patent number: 7499037Abstract: A touch screen assembly for use with a display, such as a flat panel display. The touch screen assembly includes a transparent panel, preferably in the form of a panel of tempered glass adhered to a touch screen panel. Consoles having touch screen assemblies are also disclosed.Type: GrantFiled: March 29, 2006Date of Patent: March 3, 2009Assignee: Wells Gardner Electronics CorporationInventor: Robert R. Lube
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Patent number: 7486257Abstract: A plasma display panel having a plurality of first electrodes and a driver for applying scan signals to the first electrodes in order, the driver having a plurality of selection circuit groups, each selection circuit group having a plurality of selection circuits. Driving signals are applied to the first electrodes through the output ends of selection circuits in one selection circuit group, the output ends being connected in parallel.Type: GrantFiled: November 8, 2004Date of Patent: February 3, 2009Assignee: Samsung SDI Co., Ltd.Inventors: Jin-Sung Kim, Woo-Joon Chung, Seung-Hun Chae
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Patent number: 7483014Abstract: A method of driving a display apparatus with which unevenness of image is precluded and the time for display is shortened. A display apparatus for displaying an image by impressing a voltage on pixels by row electrodes and column electrodes disposed in a matrix, for example, a metal deposition type electrochemical display apparatus. A voltage not less than a threshold voltage Vth is selectively impressed on predetermined pixels by superposing an address pulse voltage Vadress-row for the row electrodes and an address voltage Vadress-col for the column electrodes on each other to thereby perform address driving, and a data sustaining pulse voltage Vsus is impressed on the row electrodes immediately after the address pulse voltage Vadress-row. The data sustaining pulse voltage Vsus satisfies the condition of the following formula: Vsus+Vadress-col<Vth??(1).Type: GrantFiled: May 16, 2003Date of Patent: January 27, 2009Assignee: Sony CorporationInventors: Masanobu Tanaka, Ryota Odake, Kenichi Takahashi
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Patent number: 7474288Abstract: Display driver circuits are described for driving organic light-emitting diode displays, particularly passive matrix displays, with greater efficiency. Display driver circuitry includes a frame memory interface for reading data from a frame memory for presentation on a passive matrix OLED display. A blank line identifier identifies one or more substantially blank rows of pixels defined by the data in the frame memory and the control circuitry skips past these rows when the passive matrix display is addressed. When blank lines are skipped the apparent brightness of the remaining lines increases and thus preferably the control circuitry includes a power-controller for reducing a power supply to the display in proportion to the number of skipped lines. The disclosed circuitry is particularly suited to a display driver providing a controlled current drive.Type: GrantFiled: April 22, 2003Date of Patent: January 6, 2009Assignee: Cambridge Display Technology LimitedInventors: Euan C. Smith, Paul R. Routley, William Goodchild
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Patent number: 7446750Abstract: An inverter is provided, which includes: a voltage converter that converts a DC voltage from an external device into an AC voltage to drive at least a lamp and includes a primary coil and first and second secondary coils connected in series; a current sensor that senses at least a current flowing in the first or second secondary coil and generate at least a sensing signal based on the sensed at least a current; a feedback signal generator that generates a feedback signal based on the at least a sensing signal from the current sensor; and a controller that controls the voltage converter based on the feedback signal such that a tube current flowing in the at least a lamp keeps substantially constant.Type: GrantFiled: May 21, 2004Date of Patent: November 4, 2008Assignee: Samsung Electronics Co., Ltd.Inventor: Seung-Hwan Moon
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Patent number: 7432906Abstract: A timing generation circuit (15) is formed integrally on the same glass substrate (11) together with a display area section (12) similarly to an H driver (13U) and a V driver (14), and timing pulses to be used by the H driver (13U) and the V driver (14) are produced based on timing data produced by a shift register (31U) of the H driver (13U) and a shift register (14A) of the V driver (14). The invention thereby provides a timing generation circuit which can contribute to miniaturization and reduction of the cost of the set and a display apparatus of the active matrix type in which the timing generation circuit is incorporated.Type: GrantFiled: March 23, 2005Date of Patent: October 7, 2008Assignee: Sony CorporationInventors: Yoshiharu Nakajima, Yasuhito Maki, Toshikazu Maekawa
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Patent number: 7432901Abstract: A driving apparatus for a liquid crystal display that reduces a residual direct current component from flowing in a liquid crystal is disclosed. In the apparatus, a liquid crystal display panel has liquid crystal cells at crossing of gate lines and data lines. An image signal processor separates a television image signal from a complex image signal and converts a polarity of the television image signal in response to a polarity inversion signal. A timing controller generates the gate control signal for time-dividing the plurality of gate lines to sequentially drive them during one horizontal period and driving the gate lines during one horizontal period and then applying it to the gate driver, and that generates the polarity inversion signal inverted for each one horizontal period and then applying it to the image signal processor.Type: GrantFiled: June 29, 2004Date of Patent: October 7, 2008Assignee: LG Display Co., Ltd.Inventors: Jong Sang Baek, Sun Young Kwon
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Patent number: 7420534Abstract: A vertical driving circuit 5 includes: a shift register 5R having a multistage-connected structure with one stage corresponding to two gate lines G, for transferring a start pulse 2VST inputted to a first stage SR1 thereof and sequentially outputting shift pulses R1 and R2 from respective stages; an intermediate gate circuit unit 5T disposed so as to correspond to each stage of the shift register, for processing a shift pulse of one stage and a shift pulse of a preceding stage and thereby generating temporally separate intermediate pulses A and B in respective stages; and an output gate circuit unit 5U for processing the intermediate pulses A and B and thereby sequentially outputting drive pulses P1 to P4 to four corresponding gate lines G to sequentially select pixels.Type: GrantFiled: May 20, 2003Date of Patent: September 2, 2008Assignee: Sony CorporationInventors: Junichi Yamashita, Katsuhide Uchino
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Patent number: 7403185Abstract: A liquid crystal display device includes a plurality of data integrated circuits. Each data integrated circuit includes a charge sharing circuit for electrically connecting all of the data lines together in response to a control signal and a voltage variation limiting circuit for generating the control signal.Type: GrantFiled: June 29, 2004Date of Patent: July 22, 2008Assignee: LG Display Co., Ltd.Inventors: Hong Sung Song, Sung Woong Moon
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Patent number: 7391402Abstract: A method for driving an In-Plane switching (IPS) mode LCD device is disclosed. The IPS mode LCD device includes gate and data lines crossing each other to define pixel regions; thin film transistors (TFTs) alternately positioned at lower and upper side pixel regions adjacent to the corresponding gate lines; and common lines of a zigzag type along the thin film transistors in the pixel regions. A common voltage is applied, wherein a first common voltage or a second common voltage is inversely applied to even numbered common lines or odd numbered common lines in one vertical period to be synchronized with a scanning signal supplied to the first gate line, and a gate Low voltage supplied to each gate line is classified into 2 levels, and inverted in synchronization with the common voltage, thereby improving the coupling of a pixel voltage on swing of a common voltage.Type: GrantFiled: June 29, 2004Date of Patent: June 24, 2008Assignee: LG Display Co., Ltd.Inventor: Jae Kyun Lee
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Patent number: 7348959Abstract: A liquid crystal display device including: a signal converter which converts a selectively input analog image signal into a digital image signal according to a sampling clock; a scaler which samples the digital image signal output by the signal converter, to render the digital image signal suitable for a resolution, according to the sampling clock, and generates a horizontal synchronization signal of the input analog image signal; a controller which detects the horizontal synchronization signal and generates the sampling clock according to the detected horizontal synchronization signal; an inverter which is synchronized with the digital image signal and which generates a pulse signal used to drive the backlight; and a panel driver which receives the sampled image signal from the scaler and displays the received signal.Type: GrantFiled: May 20, 2004Date of Patent: March 25, 2008Assignee: Samsung Electronics Co., Ltd.Inventor: Eun-sup Kim
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Patent number: 7339554Abstract: A method for driving a cell of a plasma display panel in a duration of a frame, in which the frame contains a plurality of subfields. The method comprises setting a selected subfield in the frame of at least one cell of a scanning line to a selected state; setting each one of the subfields preceding the selected subfield to a state opposite the selected state; setting each one of the subfields succeeding the selected subfield in the frame to the same state as a corresponding subfield of a corresponding cell in an adjacent previous scanning line; and driving the one cell by turning the cell into either an ON or OFF condition from the selected subfield throughout the succeeding subfields in the frame based on the selected state of the selected subfield. Another method is to set each one of the subfields succeeding the selected subfield in the frame, based on states of corresponding subfields of corresponding cells in an adjacent previous scanning line and an adjacent next scanning line.Type: GrantFiled: June 4, 2004Date of Patent: March 4, 2008Assignee: AU Optronics CorporationInventors: Horng-Bin Hsu, Yi-I Lu, Yung-Chan Chou
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Patent number: 7334054Abstract: A method and apparatus are provided for detecting a connection associated with a display and a system having a first and second video output port. Data channel information associated with the first video output port and the second video output port are read using DDC instructions and the absence of a connection between the display and the first video output port is detected. Information associated with the absence of the connection is transferred to the display which is connected to the second video output port such that the transferred information associated with the absence of the connection can be displayed to a user in the form of an error message.Type: GrantFiled: May 20, 2004Date of Patent: February 19, 2008Assignee: Gateway Inc.Inventor: David D. Anderson