Light-emitting Diode Segments (leds) Patents (Class 345/39)
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Patent number: 7639211Abstract: An electronic device includes a plurality of first wiring lines, a plurality of second wiring lines that intersect the plurality of first wiring lines, a plurality of unit circuits that are disposed so as to correspond to intersections between the plurality of first wiring lines and the plurality of second wiring lines, and a plurality of reference signal lines that supply reference signals to the plurality of unit circuits.Type: GrantFiled: July 10, 2006Date of Patent: December 29, 2009Assignee: Seiko Epson CorporationInventor: Takashi Miyazawa
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Patent number: 7605807Abstract: A control circuit for balancing current in a thin display device includes a light source, a power supply, and a control part. The light source includes a plurality of parallel light-emitting diode (LED) rows. The LED row includes at least one LED and a switch unit. The switch unit is in series connection with the LED. The switch unit has two working conditions, one is on and the other is off, to determine whether the current passes through the LED row. The power supply provides a working power for the LEDs. The control part detects the currents of the LED rows, controls the on-state timing ratio of the switch unit and controls the output power of the power supply.Type: GrantFiled: April 3, 2006Date of Patent: October 20, 2009Assignees: Coretronic Corporation, Young Lighting Technology CorporationInventors: Pei-Ting Chen, Chih-Tsan Huang, Tzu-Shou Kuo
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Patent number: 7592970Abstract: A tiled display device is formed from display tiles having picture element (pixel) positions defined up to the edge of the tiles. Each tile includes a memory which stores display data, and pixel driving circuitry which controls the scanning and illumination of the pixels on the tile. The tiles are formed in two parts, an electronics section and a display section. Each of these parts includes connecting pads which cover several pixel positions. Each connecting pad makes an electrical connection to only one row electrode or column electrode. The connecting pads on the display section are electrically connected and physically joined to corresponding connecting pads on the electronics section to form a complete tile.Type: GrantFiled: October 1, 2004Date of Patent: September 22, 2009Inventors: Dennis Lee Matthies, Roger Green Stewart, James Harold Atherton, Dennis J. Bechis, Heinz H. Busta, Zilan Shen
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Patent number: 7589698Abstract: When an electrical characteristic of the TFT varies, display unevenness such as brightness unevenness or gradation unevenness is occurred in a display image. According to the present invention, a display device in which variation of an electrical characteristic of a TFT is reduced, and display unevenness is reduced is provided. To obtain the display device, the fluctuation ratio of ON current value in a saturation region of adjacent TFTs is set to be equal to or less than ±12% in a TFT array substrate in which a plurality of TFTs are arranged.Type: GrantFiled: March 17, 2004Date of Patent: September 15, 2009Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Mitsuaki Osame, Aya Anzai, Yu Yamazaki, Tamae Takano, Takashi Hamada
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Patent number: 7561118Abstract: Embodiments of methods, apparatuses, systems and/or devices associated with multiplexing are disclosed.Type: GrantFiled: November 12, 2004Date of Patent: July 14, 2009Assignee: Hewlett-Packard Development Company, L.P.Inventors: Duane Evans, Geir Bjune, Maxwell DeHaven, Nikholas Hubbard, Mark Lund
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Publication number: 20090102748Abstract: The invention relates to an electronic display system. The display system has a number of signs all linked together and to a controller by a mesh radio network. Each sign is made up of modular display units. Each display unit has a frame with at least two display sections (front and back) and clear frosted cover over the display sections. A pair of aperture stops is adjacent to the frosted covers. A circuit board has LEDs (Light Emitting Diodes) on both sides of the board is placed between the pair of aperture stops. Each sign is powered by a low voltage power source.Type: ApplicationFiled: October 22, 2007Publication date: April 23, 2009Inventors: Douglas E. Stoyer, Caleb C. Schmidt
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Patent number: 7515124Abstract: An amplifier circuit for generating a predetermined constant voltage required for resetting organic EL elements or capacitors is provided and an operating current switching circuit switches the operating current of the amplifier circuit to an idling current in a display period and to a steady operation current required to performing a reset operation in a reset period, so that a shifting time of the amplifier circuit from the idling state to the steady operation state can be shortened and a constant control voltage for resetting the organic EL elements or the capacitors can be generated in an initial portion of the reset period.Type: GrantFiled: May 23, 2005Date of Patent: April 7, 2009Assignee: Rohm Co., Ltd.Inventors: Hiroshi Yaguma, Masato Kobayashi
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Patent number: 7511435Abstract: A backlight unit includes: a power supplying part; a non-dimming point light source receiving power from the power supplying part and providing a feed back signal to the power supplying part; a dimming control part outputting a dimming signal; and a plurality of dimming point light sources receiving power from the power supplying part, and receiving the dimming signal from the dimming control part.Type: GrantFiled: July 13, 2007Date of Patent: March 31, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Byoung-dae Ye, Sang-hoon Lee, Ho-sik Shin
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Patent number: 7511688Abstract: The present invention relates to an electro-luminescence display that is adaptive for reducing its manufacturing cost as well as reducing its process time. An electro-luminescence display device according to an embodiment of the present invention includes a gamma generator to output a reference gamma voltage corresponding to a control data supplied from the outside; and at least one data integrated circuit to receive a data from the outside and to generate a data signal corresponding to the bit number of the data in use of the reference gamma voltage.Type: GrantFiled: February 3, 2005Date of Patent: March 31, 2009Assignee: LG Display Co., Ltd.Inventors: Jung Min Seo, Hyun Joung Kim, Won Kyu Ha, Hak Su Kim, Guen Bae Park, Eun Myung Park, Kee Mog Shin
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Patent number: 7499003Abstract: A disappearing interface system for a device, such as an appliance (e.g., a cooking range) having an interactive user interface, a light-emitting device (e.g., a LED), a microprocessor based LED fader electronic control system that uses a PWM signal to drive an A/D circuit to control the intensity (e.g., fade in/out) of the light-emitting device.Type: GrantFiled: June 21, 2004Date of Patent: March 3, 2009Assignee: Electrolux Home Products, Inc.Inventors: John R. Rudolph, Gary Fisher, Frank Downing, Robert McCoy, Maureen Donoho, James Hughes
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Patent number: 7483003Abstract: The objective of this invention is to provide a drive circuit and display system that can efficiently transfer prescribed information indicating an abnormality in the drive current supplied to the display elements to a control device. The control data used for controlling the turning on and off of LEDs are shifted sequentially from the first section to the final section of LED drivers 10-1-10-K connected in cascade. In the drive circuit of each section, the control data input from the previous section are held in the first data holding means synchronously with clock signal CLK. Then, the data held in the first data holding means are held in the second data holding means synchronously with latch signal XLAT. Current corresponding to the control data of the second data holding means is supplied to LEDs 40-1-40-M. On the other hand, when new control data are held in the second data holding means, the data indicating prescribed information concerning abnormal functioning of the LED, etc.Type: GrantFiled: June 9, 2004Date of Patent: January 27, 2009Assignee: Texas Instruments IncorporatedInventor: Masashi Nogawa
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Patent number: 7477229Abstract: This invention relates to a clock with intelligent backlight device comprising a casing, a power supply, timing components, a printed circuit board, time setting buttons and so forth. The power supply is in the form of dry batteries placed inside the battery box of the casing. Inside the casing there are a backlight device and a backlight source. The backlight device is disposed at the back of the timing components, and the backlight source is disposed at the back of the backlight device. The printed circuit board is installed with integrated circuits, the first output thereof drives and controls the timing components, the input thereof connects to the time setting buttons, while the second output thereof drives and controls the backlight source through a photosensitive resistor and an electronic switch in serial connection. The present invention is powered by dry batteries and is operated by low voltage and current.Type: GrantFiled: February 3, 2005Date of Patent: January 13, 2009Assignee: Centre Way Company LimitedInventor: Shu Kwan Wong
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Patent number: 7474294Abstract: A direct-firing backlight for a display is designed with a plurality of light emitting regions. Each of a plurality of light sensors is positioned to sense light produced by a corresponding one of the light emitting regions. A control system is operatively associated with the light sensors and light emitting regions. The control system receives information from the light sensors and, in response thereto, regulates light emitted from regions of a display. The regions of the display correspond to the light emitting regions of the direct-firing backlight. Various configurations of such a direct-firing backlight, and related methods, are also disclosed.Type: GrantFiled: September 7, 2004Date of Patent: January 6, 2009Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.Inventors: Joon-Chok Leo, Lon-Li Kevin Lim, Rizal Jaffar
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Patent number: 7471261Abstract: An integral-type liquid crystal display module has a first display panel and a second display panel, and it can use a display panel of high resolution as the second display panel. The display device includes a first display panel, a second display panel, and a first flexible printed circuit board which connects the first display panel and the second display panel. The first display panel includes a display drive unit. Video lines of the second display panel are connected with the display drive unit through connection lines for video lines of the first flexible printed circuit board. Further, the second display panel includes a scanning line drive unit which supplies drive voltages to scanning lines of the second display panel.Type: GrantFiled: September 10, 2004Date of Patent: December 30, 2008Inventors: Mitsuru Goto, Nobuhiko Hosotani, Toshio Miyazawa, Hiroyuki Takahashi, Hitoshi Komeno
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Patent number: 7463224Abstract: Each pixel in a display device includes an emissive element, a driver transistor, a control transistor, and a control capacitor. The driver transistor is provided between the emissive element and a power supply and controls supply of power from the power supply to the emissive element. The control transistor is connected between a constant voltage power supply and a gate of the driver transistor, receives a digital data signal on a gate, and controls whether or not to fix a gate voltage of the driver transistor. The control capacitor is connected between a control line and the gate of the driver transistor. The gate voltage of the driver transistor is shifted to a voltage corresponding to a control pulse signal when the control transistor is off and is non-fixed during a light emission period defined by the control pulse signal applied to the control line.Type: GrantFiled: June 18, 2004Date of Patent: December 9, 2008Assignee: Sanyo Electric Co., Ltd.Inventor: Keiichi Sano
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Patent number: 7453419Abstract: An edge lighting system has a plurality of light sources, such as light emitting diodes (LEDs) mounted at spaced-apart intervals along a rail that is disposed adjacent to an edge of a display surface. Orifices formed in the rail in which the light sources are inserted are sized to enable each light source to move freely into contact with the edge of the display surface when urged by a force provided by a compressed elastomeric member to provide a uniform illumination as the light is internally reflected in the material comprising the display surface. The light sources extend beyond a concave (parabolic) surface on the rail that reflects light from the light sources into the edge. Any object approaching the display surface is illuminated by the light being conveyed within the material.Type: GrantFiled: November 24, 2004Date of Patent: November 18, 2008Assignee: Microsoft CorporationInventors: Dawson Yee, Thomas D. Mehlhaff
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Patent number: 7372441Abstract: A circuit is provided for over-driving a super-luminescent light emitting diode having a maximum forward continuous current rating. A power supply provides a pulse width modulated signal to an analog memory connected to the power supply and a pulse generator. The pulse generator includes a window comparator engaged with the analog memory, and is responsive to a portion of the pulse width modulated signal. A power driver that is controlled by the output of the pulse generator, is operably connected with the super-luminescent light emitting diode and with the power supply so as to energize the super-luminescent light emitting diode with a current that is above the maximum forward continuous current rating by between two and ten times that rated current. A signal is also provided along with a method of over-driving a super-luminescent light emitting diode.Type: GrantFiled: June 15, 2004Date of Patent: May 13, 2008Assignee: Trafcon Industries, Inc.Inventors: Shawn Gallagher, Matthew Johnson, Timothy Zink
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Patent number: 7372430Abstract: A light emitting device including a plurality of pieces of LEDs D01, D02 to D16, one or more driving circuit(s) for supplying the plurality of LEDs D01, D02 to D16 with electrical power, the number of the driving circuit(s) being less than the number of the LEDs D01, D02 to D16, one or more multiplexer(s) being between the plurality of LEDs D01, D02 to D16 and each of the one or more driving circuit(s), a storage member for storing an image data, and a main control unit for letting the plurality of LEDs emit light by outputting a control signal to each of the multiplexer(s) based on the image data, is provided.Type: GrantFiled: July 15, 2004Date of Patent: May 13, 2008Assignee: Nittoh Kogaku K.K.Inventor: Yoshinori Shinohara
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Publication number: 20080106492Abstract: A display device with light emitting diode (LED) is provided. The display device includes an outer frame, a signal switching circuit for receiving/detecting/analyzing an input signal and outputting a corresponding signal, and an LED control circuit for receiving the corresponding signal output from the signal switching circuit and outputting a control signal. The LED control circuit at least includes a pulse width modulation (PWM) circuit for sending a pulse signal to adjust the control signal. Moreover, the display device includes at least an LED, and luminance and tone of light emitted by the LED is controlled with the control signal received.Type: ApplicationFiled: February 22, 2007Publication date: May 8, 2008Applicant: AmTRAN TECHNOLOGY CO., LTDInventor: Sheng-Wei Chen
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Patent number: 7361876Abstract: A line head includes a light-emitting element line in which a plurality of light-emitting elements, each being interposed between one electrode and another electrode, are arranged; and driving circuits that drive the light-emitting elements on the light-emitting element line, respectively. A power supply wiring line connected to the one electrode through each of the driving circuits is arranged opposite to the other electrode.Type: GrantFiled: July 22, 2005Date of Patent: April 22, 2008Assignee: Seiko Epson CorporationInventor: Takayuki Kitazawa
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Patent number: 7348946Abstract: A display that includes energy sensors within the display itself is disclosed. An Organic Light Emitting Diode (OLED) can be made to operate both as a light emitter and as an energy detector. When forward biased with an appropriate driving signal, the OLED emits light via electroluminescence, which can be used to make a portion of an image on the display. In another mode, the OLED can detect energy by converting incoming photons or energy into an electrical signal by the photoelectric effect. By operating OLEDs in the display in both emissive and sensing modes, energy that shines on the display, such as from an outside source can be detected at the same time an image is shown. Additionally, a display including OLEDs can detect light energy generated by the display itself.Type: GrantFiled: December 31, 2001Date of Patent: March 25, 2008Assignee: Intel CorporationInventors: Lawrence A. Booth, Jr., Daniel Seligson
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Publication number: 20080042927Abstract: A display apparatus and a method of adjusting brightness thereof. The display apparatus displays an image, and includes a light emitting unit divided into a predetermined number of portion areas, so that brightness is adjusted according to the respective portion areas. A driving unit is connected to the light emitting unit to adjust brightness of each of the portion areas of the light emitting unit. A control unit calculates representative values to be applied in adjusting the brightnesses of the portion areas of the light emitting unit in response to an inputted image signal, compensates the representative values with a contrast enhancement method, and outputs the compensated representative values to the driving unit. The display apparatus adjusts the representative values to be applied for adjusting the brightnesses of the portion areas of a backlight and/or gamma-corrects the inputted image to compensate for increases and decreases in brightness.Type: ApplicationFiled: February 21, 2007Publication date: February 21, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jun-ho Jung, Jun-ho Sung, Ki-bum Seong, Hanfeng Chen, Hyung-rae Kim
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Patent number: 7324099Abstract: In an image display device according to the present invention, means for selecting a pixel to which a display signal current is to be passed has a function of selecting a plurality of pixels simultaneously. Thus, high-precision display can be realized with a number of pixels.Type: GrantFiled: February 6, 2004Date of Patent: January 29, 2008Assignee: Hitachi Displays, Ltd.Inventors: Hajime Akimoto, Toshihiro Satou, Hiroshi Kageyama
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Patent number: 7319408Abstract: An outdoor display includes a net formed of intersecting cables and a number of pixel display units disposed on the net at the intersection of a pair of cables. Each pixel unit includes a number of different colored LEDs. The LEDs of the pixel units forming the display are selectively activated to form a still image or moving video images. The net display can be attached to, supported by or between existing structures.Type: GrantFiled: August 18, 2005Date of Patent: January 15, 2008Assignee: Advance Display Technologies, Inc.Inventor: John W. Temple
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Patent number: 7317429Abstract: A display panel includes an optical element which has a pair of electrodes and exhibits an optical operation corresponding to an electric current flowing between the electrodes, and a switch circuit which supplies a memory current having a predetermined current value to a current line during a selection period, and stops the supply of the memory current to the current line during a non-selection period. A current memory circuit stores current data corresponding to the current value of the memory current flowing through the current line during the selection period and, in accordance with the current data stored during the selection period, supplies a display current having a current value substantially equal to the memory current to the optical element during the non-selection period.Type: GrantFiled: December 12, 2002Date of Patent: January 8, 2008Assignee: Casio Computer Co., Ltd.Inventors: Tomoyuki Shirasaki, Hiroyasu Yamada, Reiji Hattori
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Publication number: 20080001852Abstract: A display device for displaying an image on a light emitting display, includes addition means for adding a rim to an icon, superimpose means for superimposing the rimmed icon on the image, change means for changing a ratio of superimpose between the icon and the image, and display control means for controlling displaying the image superimposed with the rimmed icon on the display, wherein the icon is superimposed on the image in a semi-transparent manner.Type: ApplicationFiled: June 27, 2007Publication date: January 3, 2008Applicant: Sony CorporationInventor: Kunihito Saiki
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Patent number: 7312773Abstract: An electronic ornament that can be worn or attached to or suspended from an object has an LED matrix (21) capable of displaying a user-selected message from a preprogrammed set of graphic symbols or a user-programmed arbitrary pattern or animation. A safety pin (31) or other fastener (34) attaches the ornament to a wearer or to an object, making the display readable by others during conversations and gatherings from a distance of several meters. The user can select the message or pattern using only two buttons (28) and (29), and the selection is retained even when battery (25) is removed. The LED display (21) scrolls messages horizontally such that more than one average text character but less than one average word is visible at a time, making the display surprisingly readable yet economical and small enough to make it easy to wear or use as a lightweight ornament.Type: GrantFiled: July 9, 1999Date of Patent: December 25, 2007Assignee: Rapid Prototypes, Inc.Inventors: Brian Von Herzen, David C. Keenan
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Patent number: 7298351Abstract: A driver includes a plurality of variable resistors each coupled to a corresponding one of the rows of the organic light-emitting diode display panel, generally between Ground (GND) and the cathodes of the OLEDs on the rows. A variable resistor controller in the driver is coupled to the variable resistors, and adjusts the resistance of the variable resistor coupled to the selected row based upon the display data corresponding to the selected row. The variable resistor controller adjusts the resistance of the variable resistor coupled to the selected row to be inversely proportional to the sum of the display data corresponding to the selected row.Type: GrantFiled: July 1, 2004Date of Patent: November 20, 2007Assignee: Leadia Technology, Inc.Inventor: Chang Oon Kim
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Publication number: 20070200793Abstract: A pixel including an organic light emitting diode, an organic light emitting display device including the pixel, and a method for driving the organic light emitting display device. The pixel includes first and second drivers and first and second selectors. A horizontal period for driving the pixel includes first and second periods. The first driver charges a first voltage corresponding to a reference current flowing into a data line during the first period. The second driver charges a second voltage corresponding to a sum of the reference current and a pixel current during the second period. The first selector is turned-on during the horizontal period for connecting the data line to the first and second drivers. The second selector controls the flow of current to the organic light emitting diode and is turned-off during the horizontal period but is otherwise turned-on.Type: ApplicationFiled: February 22, 2007Publication date: August 30, 2007Inventor: Oh Kyong Kwon
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Publication number: 20070171146Abstract: An LED driving apparatus having a temperature compensation function includes a reference voltage generator for generating a first reference voltage and a non-inversion amplification unit for performing non-inversion amplification to a difference voltage between the first reference voltage and a forward voltage with a preset gain. A driving unit adjusts a supply voltage in response to the voltage from the non-inversion amplification unit to supply the adjusted supply voltage to a light source having light emitting diodes. A forward voltage detector detects the forward voltage at an anode of the light emitting diodes of the light source to supply the forward voltage to the non-inversion amplification unit. Luminance variation can be compensated according to temperature changes by using a forward voltage of an LED light source so that the forward voltage of the LED light source can be controlled in association with a target current value of ambient temperature.Type: ApplicationFiled: January 24, 2007Publication date: July 26, 2007Inventors: Dong Woo Lee, Soo Ryong Hwang, Moo Youn Park
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Patent number: 7236146Abstract: A display device comprising a first body and a second body, the second body connected to the first body at a rotary connection. A display element, which may include one or more light-emitting diodes, is disposed on the second body. A controller is electrically connected to the first display element so as to vary the state of the display element in response to relative movement between the first body and second body.Type: GrantFiled: November 19, 2003Date of Patent: June 26, 2007Assignee: Axxion Group CorporationInventors: Jonathan W. Smedley, Po W. Hu, Leon W. Schmidt
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Patent number: 7233325Abstract: A structure and a method for reducing source line resistance of a light emitting diode. A light emitting diode display has at least a light emitting diode, a power source and a power source line structure for guiding the power source to provide the required power for driving the light emitting diode. The structure for reducing the source line resistance has an insulation layer formed on at least a part of the source line structure. The insulation layer has at least two openings exposing the source line structure. A conductive layer is formed to cover the insulation layer and is in electrical contact with the source line structure through the openings. Thereby, the conductive layer and the source line are connected in parallel, and the resistance of the source line is thus reduced.Type: GrantFiled: November 13, 2003Date of Patent: June 19, 2007Assignee: Au Optronics CorporationInventors: Jen-Yi Hu, Wein-Town Sun
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Patent number: 7161256Abstract: An automatic power-generation light-image fan device is described. It has a fan motor, a vane set, a circuit board, a programmable chip, an automatic power-generation component, a rectifier filter circuit, a magnetic sensor and a positioning magnet. In this device, the circuit board is mounted on the vanes of the vane set and also has plural light-emitting elements, which are respectively connected to I/O terminals of the programmable chip, and an accommodating room is mounted on an inner surface of the vane set, in which an inner circular surface of the accommodating room is circularly mounted by an inductance coil whose ends are connected to an input terminal of the rectifier filter circuit. Thereby, the light-emitting elements mounted on the fan can be controlled to generate various different twinkling light-image variations and an effect of persistence of vision when the fan motor is rotating.Type: GrantFiled: January 17, 2006Date of Patent: January 9, 2007Inventor: Yi Feng Fang
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Patent number: 7161563Abstract: A method and apparatus is provided for electronically providing vehicle identification and registration information to a vehicle. The system includes a remote control unit, which receives and stores vehicle identification and registration information. At least one computer on the vehicle is configured to receive the vehicle identification and registration information and to store such information. An electric license plate coupled to this computer for electronically displaying at least a portion of the identification and registration information stored in the computer.Type: GrantFiled: December 17, 2001Date of Patent: January 9, 2007Assignee: General Motors CorporationInventors: Robert Louis Vitale, Kevin G. Kolpasky
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Patent number: 7142173Abstract: A visual display device is constructed which uses the “persistence of vision” effect of human vision and responds to kinetic motions of the user as the device is held and swung by an operator. Displays may consist of alphanumeric and graphic data with image symmetry not required. A microcontroller adjusts the display to conform to the speed and width of the users swing, synchronizing the display to the users motions. Both the user and viewers of the device are enabled to see the displayed images correctly oriented and stable within the path of the swinging device. The user is provided with visual and or audio feedback, which helps in coordinating a steady swing, and gives an indication of the orientation of the displayed data. The device is fabricated in such a way that costs are at a minimum, allowing this technology to be used in widespread disposable or reusable applications. The technology is expanded to displays in which the viewer provides the kinetic motion and the device is held stationary.Type: GrantFiled: October 31, 2001Date of Patent: November 28, 2006Inventor: Arthur Lane Bentley
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Patent number: 7131735Abstract: A light source device, comprising a light guide block that is provided with an inner wall capable of reflecting light and is shaped as a hollow component to form a light guide, and a point light source array that is located opposite one end face of the light guide block and is capable of emitting light into the light guide.Type: GrantFiled: March 6, 2003Date of Patent: November 7, 2006Assignee: Seiko Epson CorporationInventor: Osamu Yokoyama
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Patent number: 7112928Abstract: An organic light emitting diode (OLED) panel device includes an OLED panel for displaying an image data and an OLED panel operation circuit for outputting the image data to the OLED panel and performing a screen saving operation without a memory access in order to increase a durability of the OLED panel. A method for operating an OLED panel device includes the steps of outputting an image data transmitted from a memory, performing a screen saving operation without a memory access in order to increase a durability of the OLED panel and displaying the image data or the screen saving operation via one of the steps above described.Type: GrantFiled: March 3, 2005Date of Patent: September 26, 2006Assignee: Magna Chip Semiconductor, Ltd.Inventor: Dae-Young Yoo
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Patent number: 7106276Abstract: In a field sequential display device, a desired chromaticity of the white level can be easily achieved and fluctuations in the white level caused by fluctuation factors such as temperature characteristics can be suppressed. A light source comprises red, green, and blue LEDs and a white LED. The white LED includes a blue LED covered with a yellow fluorescent material. One field is divided into display subfields of red, green, blue and white. Only the red LED turns on in the red display subfield, only the green LED turns on in the green display subfield, only the blue LED turns on in the blue display subfield, and only the white LED turns on in the white display subfield. A shutter is controlled in each subfield based on sub-image data of each color.Type: GrantFiled: March 26, 2003Date of Patent: September 12, 2006Assignee: Citizen Watch Co., Ltd.Inventor: Takashi Akiyama
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Patent number: 7083284Abstract: Embodiments of the present invention include an apparatus, method and system relating to a projection illumination source pulsing one or more light emitting devices a plurality of times per frame.Type: GrantFiled: April 30, 2004Date of Patent: August 1, 2006Assignee: InFocus CorporationInventors: Mark D. Peterson, T. Scott Engle
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Patent number: 7061454Abstract: An LED device comprises a white LED device and a red LED device. The white LED device has a substrate, a blue LED mounted on the substrate for emitting blue light, a transparent resin covering the blue LED and including phosphor particles. The phosphor particle has a quality to convert blue light to white light, if the particle contacts with the blue light. The red LED device has a substrate, a red LED mounted on the substrate for emitting red light, and a transparent resin covering the red LED device is disposed so that emitted red light mixes with the white light emitted from the white LED device.Type: GrantFiled: July 16, 2003Date of Patent: June 13, 2006Assignee: Citizen Electronics Co., Ltd.Inventors: Masatoshi Sasuga, Yoshihisa Hirayama, Ryo Tamura, Takashi Akiyama
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Patent number: 7030420Abstract: A linear array of red LEDs 10R is provided so as to extend in a direction substantially perpendicular to a direction in which a swing-type display device is swung, and a linear array of green LEDs 10G is further provided, the red LEDs 10R and green LEDs 10G being arranged in pairs of two. A CPU activates each of the red LEDs 10R and green LEDs 10G for a predetermined period to emit light in a luminance level in accordance with image data. As a result, an image corresponding to the image data is displayed in the trajectory of the swing due to persistence of vision. Thus, an image can be displayed in various colors.Type: GrantFiled: August 22, 2003Date of Patent: April 18, 2006Assignee: Nintendo Co., Ltd.Inventors: Masaru Shimomura, Mikihiro Ishikawa, Hirotaka Uemura, Ryo Fukasawa, Masahiko Ota
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Patent number: 7030893Abstract: The present invention discloses a method for driving a full-color LED display board with high resolution. It features three original color LED pixels that are arranged in a diamond pattern to form LED array, and an interlacing scan circuit is used to control the LED array. As a result, the display of a new pixel can be inserted between two contiguous pixels and the resolution of the full-color LED display board increases.Type: GrantFiled: February 25, 2003Date of Patent: April 18, 2006Assignee: Neo-Led Technology Co., Ltd.Inventor: Ming-Hsiang Yang
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Patent number: 7015877Abstract: A multi-color segmented LED or other light emitting arrangement display includes specially designed segments such that there are two or more rooms within one segment. When one or more LEDs or light emitting arrangements with different colors are placed in each room of a segment, the segment will generate a very special light effect—a multi-colored segment. In one aspect, it is possible to control the height of the wall between rooms such that a mixed color light effect is produced between the adjacent rooms. The multi-color segmented display can be used in a variety of applications.Type: GrantFiled: June 30, 2004Date of Patent: March 21, 2006Assignee: Litech Electronic Products LimitedInventors: Luiz Lei, Chi Biu Gorden Wong
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Patent number: 6995893Abstract: The invention provides an electro-optical device, a method of manufacturing an electro-optical device, an apparatus for manufacturing an electro-optical device, and an electronic apparatus, in which, in the electro-optical device, a gap formed between two substrates functioning as constituent elements thereof or the thickness of an adhesive layer, which adheres the two substrates to each other, can be precisely controlled. The electro-optical device has at least a substrate and a sealing substrate which is adhered to the substrate and which is composed of a transparent plate member, in which the substrate and the sealing substrate are adhered to each other with an adhesive layer provided therebetween so as to form a gap therebetween; measurement surfaces, used to measure the thickness of the adhesive layer, are provided in the gap; and on the measurement surfaces, an adhesive is not provided.Type: GrantFiled: April 23, 2003Date of Patent: February 7, 2006Assignee: Seiko Epson CorporationInventor: Hidekazu Kobayashi
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Patent number: 6989806Abstract: An embodiment of the present invention pertains to an electronic device such as a passive matrix display, an alpha-numeric display, a detector array, or a solar cell array. The electronic device includes multiple organic optoelectronic devices and one or more of these organic optoelectronic devices are protected from shorts. Each of the one or more organic optoelectronic devices that is protected from a short has one of its electrodes coupled to a first current limiting device and optionally has another electrode coupled to a second current limiting device. Also, one of the electrodes of that organic optoelectronic device, the first current limiting device, or the second current limiting device is patterned.Type: GrantFiled: November 20, 2002Date of Patent: January 24, 2006Assignee: Osram Opto Semiconductors GmbHInventors: Franky So, Homer Antoniadis, Ian Millard, Vung Vo
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Patent number: 6965357Abstract: A light-emitting element drive circuit capable of controlling the drive current of a light-emitting element in consideration of changes in a threshold value of the light-emitting element. A laser diode 1 emits light in accordance with a bias current Ib of a bias current drive circuit 2 and a light-emitting current Ip of a data current drive circuit 3. A photodiode 4 outputs a monitor current Im that corresponds to the optical output of the laser diode 1. A bias current feedback circuit 8 detects a change in the threshold current in accordance with the current Im, and outputs a control signal CS1. The bias current drive circuit 2 generates a bias current Ib that corresponds to the threshold current Ith of the laser diode 1 after the change. A light-emitting current feedback circuit 9 detects a change in the optical output of the laser diode 1 in accordance with the current Im, and outputs a controls signal CS2.Type: GrantFiled: April 22, 2003Date of Patent: November 15, 2005Assignee: Freescale Semiconductor, Inc.Inventors: Hiroshi Sakamoto, Tsukasa Hoshi
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Patent number: 6919990Abstract: A display system is disclosed that includes a light source, an integrator rod receiving a light beam from the light source and producing an integrated light beam, a beam splitting device splitting the integrated light beam into at least a first cone of light and a second cone of light, the cones of light having complementary intensity distributions, and at least a first spatial light modulator and a second spatial light modulator, wherein the first spatial light modulator is capable of selectively reflecting portions of the first cone of light in an ON direction and the second spatial light modulator is capable of selectively reflecting portions of the second cone of light in an ON direction. The display system further includes a combining device for combining the selectively reflected portions of the cones of light in the ON direction and projection optics for projecting the combined reflected cones of light.Type: GrantFiled: April 18, 2001Date of Patent: July 19, 2005Assignee: IMAX CorporationInventors: Serguei G. Anikitchev, Steven Read, Graham H. Moss
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Method for transforming three color input signals to four or more output signals for a color display
Patent number: 6897876Abstract: A method for transforming three color input signals (R, G, B) corresponding to three gamut defining color primaries to four color output signals (R?, G?, B?, W) corresponding to the gamut defining color primaries and one additional color primary W for driving a display having a white point different from W includes the steps of: normalizing the color input signals (R,G,B) such that a combination of equal amounts in each signal produces a color having XYZ tristimulus values identical to those of the additional color primary to produce normalized color signals (Rn,Gn,Bn); calculating a common signal S that is a function F1 of the three normalized color signals (Rn,Gn,Bn); calculating a function F2 of the common signal S and adding it to each of the three normalized color signals (Rn,Gn,Bn) to provide three color signals (Rn?,Gn?,Bn?); normalizing the three color signals (Rn?,Gn?,Bn?) such that a combination of equal amounts in each signal produces a color having XYZ tristimulus values identical to those of theType: GrantFiled: June 26, 2003Date of Patent: May 24, 2005Assignee: Eastman Kodak CompanyInventors: Michael J. Murdoch, Michael E. Miller, Ronald S. Cok -
Patent number: 6864863Abstract: The invention provides an organic electroluminescent element driving circuit to which a reverse-bias is applied, which does not require a substantial increase in power consumption an increase in layout space. With switches arranged, electroluminescent elements are set to be in a reverse-bias state. The pixels are reverse-biased on the basis of a group of predetermined pixels at a time, for example, the pixels are reverse-biased on a pixel-by-pixel basis or on a line-by-line basis, or all pixels are reverse-biased at a time. In this way, reverse bias can be applied without the need for an additional power source, and without requiring a substantial increase in power consumption nor an increase in layout space. The service life of the organic electroluminescent element can thus be prolonged.Type: GrantFiled: October 11, 2001Date of Patent: March 8, 2005Assignee: Seiko Epson CorporationInventor: Toshiyuki Kasai
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Patent number: 6839069Abstract: A light emission display drive apparatus used as a light emission display drive circuit includes an at least second-order ?? modulator 3 for turning on/off a constant drive current or a constant drive voltage, thereby performing gradation control of each light emitting element. A pixel read section 2 reads the brightness value of each light emitting element in a predetermined period, the ?? modulator 3 performs ?? modulation in a predetermined period in response to the read brightness value, and an output change section 36 of the ?? modulator performs operations of detecting unevenness of a list of output pulses of the ?? modulation and dispersing the output pulses in the same light emitting element among light emitting elements, thereby performing multiple-step gradation control of the light emitting element.Type: GrantFiled: November 20, 2001Date of Patent: January 4, 2005Assignee: Pioneer CorporationInventor: Yoshiyuki Okuda