Electric lamp and discharge devices: systems inventions 05/09

20090134802 - Showcase: An object is to provide a showcase in which appropriate illumination can be realized by an LED illumination apparatus having a high durability against turning ON/OFF and capable of securing a predetermined illumination intensity even under an environment at a low temperature. The showcase in which the inside of a... Agent: Kratz, Quintos & Hanson, LLP

20090134803 - Plasma device with low thermal noise: A plasma device having low thermal noise, which results in a high signal-to-noise ratio (SNR) of the plasma device. The plasma device includes devices with a plasma that is responsive to electromagnetic radiation and/or electrical signals. In various configurations, the plasma device has a plasma in which the temperature, resistance,... Agent: Knox Patents

20090134804 - Axial hall accelerator with solenoid field: The present patent letters discloses a Hall Current accelerator with a solenoid Hall field, a collimated gas source, an anode, intermediate Hall effect ionization magnetic field structures and intermediate acceleration electrodes. The Hall field in this case is the end cusp field(s) of a common solenoid magnetic field.... Agent: Mark Morehouse

20090134805 - Electrodeless dischage lamp device and lighting fixture using the same: An electrodeless discharge lamp device comprises an induction coil, a pair of cores 1a, 1b, and thermal conductor 2. The cores 1a, 1b are configured to generate a high-frequency electromagnetic field for exciting a discharge gas with receiving a high frequency electric power. Each of the cores is arranged to... Agent: Edwards Angell Palmer & Dodge LLP

20090134806 - Led backlight circuit system: An improved electrical circuit design and method to drive a plurality of LEDs in an LCD backlight in order to produce a uniform color distribution across the entire viewable surface of the display. The embodiments disclosed have features that permit a predetermined reduction in the amount of current provided to... Agent: Standley Law Group LLP

20090134807 - Color management system and method for led backlights: Disclosed herein are embodiments of color management systems and methods for LED backlights. One exemplary system comprises: a collection device adapted to collect optical signals of the LED array, transform the optical signals into electric signals and send the electric signals; a control device connected with the collection device adapted... Agent: Klarquist Sparkman, LLP

20090134808 - Discharge tube array and display device using same: A discharge tube array includes a plurality of narrow discharge tubes (10) each provided with an internal fluorescent layer (13). The array also includes a holder (20) formed with a hollow portion (21) for holding the discharge tubes (10) in a mutually parallel state, where the discharge tubes (10) are... Agent: Hamre, Schumann, Mueller & Larson, P.C.

20090134809 - Plasma display apparatus: A plasma display apparatus is disclosed. The plasma display apparatus includes a plasma display panel and a driver. The plasma display apparatus includes a scan electrode, a sustain electrode, an address electrode, a lower dielectric layer on the address electrode, and a phosphor layer on the lower dielectric layer. The... Agent: Fish & Richardson P.C.

20090134810 - Led string: A light-emitting diode (LED) string is provided. The LED string includes a power plug configured for connecting with a power source to power the LED string; one or more LED sockets configured for electrically connecting with the power plug; one or more LEDs configured for being installed on and electrically... Agent: PCe Industry, Inc. Att. Steven Reiss

20090134811 - Reduced power loss in electronic ballasts: An electronic ballast is disclosed, in particular for operation of gas-discharge lamps, in which a further power semiconductor is provided in addition to the conventional power semiconductor, and provides the power required for steady-state operation. This avoids the high-power MOSFET transistors, whose power losses are high, also being used for... Agent: Osram Sylvania Inc

20090134813 - Discharge lamp lighting device: The inverter circuit is feedback-controlled by a substantial current flowing into the discharge lamp, which is detected by the current detecting means. A high starting voltage is supplied to the discharge lamp with the operation frequency lowered by the control circuit after the end of a preheating action. The inverter... Agent: Darby & Darby P.C.

20090134812 - Exhaust fan for showing variable characters: The present invention is related to an exhaust fan, particularly to a fan applied to a personal computer (PC) or computer's power source unit (PSU). The exhaust fan includes base, blade and a second printed circuit board (PCB). The second PCB is disposed on a surface of the blade. A... Agent: Sally Chang

20090134815 - Backlight unit and liquid crystal display device having the same: 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... Agent: F. Chau & Associates, LLC

20090134814 - Backlight unit, display device comprising the same, and control method thereof: A backlight unit includes a plurality of light source units arranged in a matrix form, a light source controller outputting a dimming signal to control a brightness of the light source units and a latch signal to control a light source unit row of the plurality of light source units... Agent: Frank Chau, Esq. F. Chau & Associates, LLC

20090134817 - Method and apparatus for controlling current supplied to electronic devices: The present invention provides a drive and control apparatus provides a desired switched current to a load including a string of one or more electronic devices. A voltage conversion means, based on an input control signal converts the magnitude of the voltage from the power supply to another magnitude that... Agent: Philips Intellectual Property And Standards

20090134816 - Self adjusting power supply apparatus and method: Apparatus and methods are disclosed that control power supplies to automatically provide the appropriate voltage to drive constant current devices. A lighting system according to the present invention comprises a lighting module having a constant current device that provides a constant current in response to constant current voltage. A power... Agent: Koppel, Patrick, Heybl & Dawson

20090134818 - Universal input voltage device: A universal input voltage device is presented which may receive a wide range of regulated and unregulated input voltages, both DC and a wide range of variable frequency AC, and output a desired regulated current at a desired voltage independent of the fluctuation of input voltage and frequency. The circuit... Agent: D.a.n Chase Chase Law Firm, L.c.

20090134819 - Illumination and sleep evaluation system: An illumination system (1) includes a lighting device (3); a manipulation device (6) for a user to manipulate when the user intends to fall asleep; a control unit (2) for detecting a start time of measuring a sleep latency based on a manipulation time at which the manipulation device is... Agent: Bacon & Thomas, PLLC

20090128040 - Systems and methods for waveguides: In various representative aspects, the present invention provides systems and methods for waveguides. A waveguide may comprise a housing and a plurality of reflective surfaces configured to couple to the housing. The housing may be configured to couple to an electromagnetic wave beam generator. The electromagnetic wave beam generator may,... Agent: The Noblitt Group, PLLC

20090128041 - Microwave plasma generation method and microwave plasma generator: A microwave plasma generator in which the generating amount of radicals can be regulated easily with higher reaction efficiency while reducing gas consumption. The microwave plasma generator comprises an outer conductor (2), an inner conductor (3) arranged in the internal space (4) of the outer conductor, a discharge tube (7)... Agent: Kirschstein, Israel, Schiffmiller & Pieroni, P.C.

20090128042 - Gold or silver plated wire leads on christmas lights: The electrical wire leads of miniature lights or LED's in a series-wired Christmas light string are gold or silver plated to resist corrosion. The wire leads of any shunt components used in the sockets of the light string can also be plated for corrosion resistance.... Agent: Dickstein Shapiro LLP

20090128043 - Light sensing apparatus and display device thereof: A light sensing apparatus and a display device thereof are provided. The light sensing apparatus comprises a filtering device and a light sensing device. The filtering device filters off a part of the ambient light and outputs the other part of the ambient light. The light sensing device outputs a... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20090128044 - Daylight tracking simulator and/or phototherapy device: A fluorescent or light emitting diode-based system for generating light flux. The system comprises a lamp comprising at least one light source for illuminating an area. At least one of the at least one light source is selected from the group comprising at least one of a fluorescent light source... Agent: Lowe Hauptman Ham & Berner, LLP

20090128045 - Electronic circuits for driving series connected light emitting diode strings: Electronic circuits provide an error signal to control a regulated output voltage signal generated by a controllable DC-DC converter for driving one or more series connected strings of light emitting diodes.... Agent: Daly, Crowley, Mofford & Durkee, LLP

20090128046 - Rectifier module for led lamp strings: A rectifier module is provided for simultaneous use with a plurality of light-emitting diode (LED) lamp strings. The rectifier module includes an extension cable having first and second ends to which first and second connectors are mounted and a casing mounted to the extension cable and including therein an electronic... Agent: Joe Mckinney Muncy

20090128047 - Backlight assembly, display apparatus having the same and control method thereof: A backlight assembly with a light source unit, includes: a drive signal generator which generates a switching drive signal on the basis of a predetermined drive frequency and a feedback power fed back from the light source unit; a switching unit which outputs a power to the light source unit... Agent: Sughrue Mion, PLLC

20090128048 - Organic light emitting diode power converter: A power converter circuit converts an AC line signal to a DC signal for powering an organic light emitting diode. The circuit uses only capacitive elements to limit current to the LED. Inductive and resistive elements are not included in the circuit to limit current. The absence of inductive components... Agent: Fay Sharpe LLP

20090128049 - Discharge lamp lighting apparatus: A discharge lamp lighting apparatus includes a switch circuit for DC/AC converting, a discharge lamp connected to a secondary winding of a transformer, a current detector detecting an AC output current of the discharge lamp, an error amplifier outputting an error signal to a detected current, a control circuit generating... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090128051 - Apparatus and method of driving lamp of liquid crystal display device: A method of driving a lamp of a liquid crystal display device includes generating a control signal; generating a first drive signal using the control signal; generating a second drive signal by shifting a voltage level of the first drive signal; selectively outputting one of a high potential supply voltage... Agent: Mckenna Long & Aldridge LLP

20090128050 - Circuit unit: The invention relates to a circuit unit for a semiconductor unit which produces radiation, with a forward voltage Uf being applied during operation to the semiconductor unit which produces radiation, and with a forward current If flowing through the semiconductor unit which produces radiation, with the circuit unit regulating the... Agent: Frishauf, Holtz, Goodman & Chick, PC

20090128052 - Extended life led fixture with distributed controller and multi-chip leds: An LED fixture includes multiple LED drivers and a multi-chip LED package so that the lifetime of the fixture is a multiple of the lifetime of a conventional fixture that uses only a single LED driver. A distributed controller activates and deactivates the LED drivers so that different subsets of... Agent: John S. Pratt, Esq Kilpatrick Stockton, LLP

20090128053 - Apparatus and technique for modular electronic display control: The present invention discloses apparatus and techniques for modular backlighting control of a display. The display includes a number of strings of LEDs. The display is divided into several sections, and each section includes one or more strings of LEDs. A local controller is assigned to each section. The local... Agent: Howrey LLP-ca

20090128054 - Extended life led fixture with central controller and led lamps: An LED fixture includes multiple LED drivers and multiple LED lamps so that the lifetime of the fixture is a multiple of the lifetime of a conventional fixture that uses only a single LED driver. A central controller activates and deactivates the LED drivers so that the different LED lamps... Agent: John S. Pratt, Esq Kilpatrick Stockton, LLP

20090128055 - Apparatus for driving light emitting element: Provided is an apparatus for driving a light emitting element. The apparatus includes a power unit, a light emitting element array, a constant-current circuit unit, and a voltage limiting circuit unit. The power unit supplies driving power. The light emitting element array includes a plurality of light emitting elements connected... Agent: Lowe Hauptman Ham & Berner, LLP

20090128056 - Light-emitting device: A light-emitting device includes a plurality of light-emitting units, a plurality of non-address-embedded brightness control integrated circuits (ICs) and at least one system control unit. Each of the brightness control ICs is electrically connected to each of the light-emitting units. The system control unit addresses each of the brightness control... Agent: Birch Stewart Kolasch & Birch

20090128057 - Fluorescent lamp and ballast with balanced energy recovery pump: A fluorescent lamp formed of a power control unit and a fluorescent lamp assembly. The lamp assembly includes a fluorescent tube having filaments and including inductive and capacitive components connect to the filaments forming a resonant network. The power control unit includes an input power unit, an energy recovery pump,... Agent: David E. Lovejoy, Reg. No. 22,748

20090128058 - Overload protection circuit: A current shut-off overload protection circuit useful for fluorescent lamp ballast protection and the like has at least one power transistor for supplying a load current to a circuit load, a protection circuit comprising a current sensing resistance connected for developing a voltage drop related to the circuit load, and... Agent: Law Offices Of Natan Epstein

20090128059 - Control device for controlling the color of light emitted from a light source: The invention relates to a control device (1) for controlling the color of light (L) emitted from a light source (2). The control device comprises color variation means (24) for varying the color of said light emitted from said light source and one or more light-emitting elements (26) arranged to... Agent: Philips Intellectual Property And Standards

20090128060 - Extended life led fixture with central controller and multi-chip leds: An LED fixture includes multiple LED drivers and a multi-chip LED package so that the lifetime of the fixture is a multiple of the lifetime of a conventional fixture that uses only a single LED driver. A central controller activates and deactivates the LED drivers so that different subsets of... Agent: John S. Pratt, Esq Kilpatrick Stockton, LLP

20090128061 - Methods and systems for operating and controlling theatrical lighting: A system and method for increasing a number of lights operated and/or controlled by dimmer boxes of theatrical light systems. In one embodiment, a master box is coupled to a chain of slave boxes in series. The master box receives a control signal and generates a switching signal for controlling... Agent: Christie, Parker & Hale, LLP

20090128062 - Electric power tool: An electric power tool, which comprises a motor that drives a tool, a power source unit that applies voltage to the motor, a main switching circuit that makes/breaks an electrical connection between the power source unit and the motor, an illuminator that illuminates a work spot, a switching device that... Agent: Oliff & Berridge, PLC

20090121638 - Cold air atmospheric pressure micro plasma jet application nethod and device: A microhollow cathode discharge assembly capable of generating a low temperature, atmospheric pressure plasma micro jet is disclosed. The microhollow assembly has at two electrodes: an anode and a cathode separated by a dielectric. A microhollow gas passage is disposed through the three layers, preferably in a taper such that... Agent: Williams Mullen

20090121637 - Plasma generator: A plasma generator, comprising a dielectric tube having a first end and a second end, wherein the first end is sealed, but for a gas inlet; at least one first dielectric disk located within the dielectric tube, wherein the first dielectric disk includes at least one first dielectric aperture formed... Agent: Peter A. Shaddock Ii Bowman Green Hampton & Kelly

20090121639 - Control device for discharge lamp: The present invention refers to a driving device of a discharge lamp (10) having two cathodes. Said device comprises first means (1, 11) having a supply input voltage (Val) and suitable for providing an alternating voltage at the ends of the cathodes, second means (3) capable of monitoring a condition... Agent: Hogan & Hartson LLP

20090121640 - Discharge lamp ballast apparatus: A discharge lamp ballast apparatus includes a fault detecting section 9b of a discharge lamp 6; a first storing section 10 for storing a fault detected; a lighting delay detecting section 9c-3 for detecting lighting delay time from beginning of starting operation to lighting of the discharge lamp; a reigniting... Agent: Birch Stewart Kolasch & Birch

20090121641 - Illumination system and illumination control method: This invention discloses an illumination method and an illumination control method. An embodiment of the illumination system includes two light detection modules for detecting a light produced by a light emitting diode and an ambient light, calculating a reference spectral distribution based on a detection result of the ambient light,... Agent: Rosenberg, Klein & Lee

20090121642 - Organic light emitting diode driver: Pulse width modulation (PWM) of a drive current to an organic light emitting diode (OLED) is performed by a circuit subjected to corresponding signaling.... Agent: Lee & Hayes, PLLC

20090121643 - Backlight unit and liquid crystal display device including the same: A backlight unit of a liquid crystal display includes a lamp, a balancing pattern capacitor electrically connected to the lamp for current balance, a transformer electrically connected to the lamp via the balancing pattern capacitor, a sensing pattern capacitor electrically connected to a terminal of the balancing pattern capacitor connected... Agent: F. Chau & Associates, LLC

20090121644 - Adaptive algorithm for camera flash led power control vs. battery impedance, state of discharge (sod), aging, temperature effects: A method for driving a light-emitting semiconductor is provided. A supply voltage is converted into a secondary output voltage for supplying the light-emitting semiconductor with an output voltage. A level for the supply voltage at the beginning of a high current phase of the light-emitting semiconductor is sensed. A threshold... Agent: Texas Instruments Incorporated

20090121645 - Circuit arrangement for operating a discharge lamp having temperature compensation: The invention relates to a circuit arrangement which is used to operate a low pressure discharge lamp (EL), wherein the discharge lamp receives power. Said circuit arrangement is embodied in such a manner that power-determination components (C2a, L2a) of the circuit arrangement are embodied in a temperature-dependent manner such that... Agent: Viering, Jentschura & Partner - Osr

20090121646 - Electrodeless discharge lamp illuminator: An electrodeless discharge lamp lighting fixture which can secure lightness even in the case of a dimmering control at a low temperature. The electrodeless discharge lamp lighting fixture according to the present invention comprises an electrodeless discharge lamp 1, a dimmering inverter 3 which is connected to an AC power... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20090121647 - Multi-lamp backlight apparatus: A multi-lamp backlight apparatus is disclosed. The multi-lamp backlight apparatus includes 2N lamps, N balancing transformers, and a high-voltage power source. N is a positive integer and k is an integer index ranging from 1 to N. The kth balancing transformer among the N balancing transformers includes a first primary... Agent: Morris Manning Martin LLP

20090121651 - Color-changing light array device: A color-changing light array powered by a driver circuit, the driver circuit responsive to a controller circuit, and the controller circuit configured to change display lighting patterns or colors based on modes of operation and off-on power cycle intervals.... Agent: Michael Blaine Brooks, P.C.

20090121649 - Illuminating apparatus for display device and display device having same: An illuminating apparatus used for a display device includes a plurality of illuminating parts, each of which comprises a first feeding member, a second feeding member, and a cold-cathode tube lamp that is fed by a power supply apparatus via the first and second feeding members. An equivalent circuit of... Agent: Sharp Kabushiki Kaisha C/o Keating & Bennett, LLP

20090121648 - Lighting device: A lighting device (101), comprising: an electrical connector (104) for fitting in a lamp socket; a fluorescent tube; an electrode (105) for ionising air, and a ballast circuit (301) configured to supply suitable electrical currents and voltages to the fluorescent tube (102) during starting and subsequent operation. The lighting device... Agent: James C. Wray

20090121650 - Maximizing efficiency of battery-powered led drivers: An apparatus and method is provided for optimizing LED driver efficiency. The present invention offers low cost solutions for powering LEDs while minimizing overall power dissipation in devices powered by a depletable power source. Low system cost is attained using a charge pump to increase LED drive voltage level and... Agent: Goodwin Procter LLP Patent Administrator

20090121652 - Light source module, backlight assembly having the same, display device having the same and method for reducing number of wires used in interconnect cable of the same: A light source module includes a driving substrate, a plurality of light source blocks and a currents control element. The light source blocks are disposed on the driving substrate, and each of the light source blocks includes at least one light source. The currents control element is disposed on the... Agent: Haynes And Boone, LLPIPSection

20090121653 - Constant current circuit, light emitting apparatus and power supply apparatus using that constant current circuit: In a constant current circuit that supplies a constant current Ic to a circuit connected to a current output terminal, the first transistor M1 is disposed on a current path of the constant current Ic. The second transistor and the first transistor have commonly connected gate terminals which are control... Agent: Cantor Colburn, LLP

20090121654 - Led light output linearization: A system and method for producing a flattened characteristic for LED luminous output. The system may include an array containing one or more light emitted diodes, a power source connected to the LED array providing drive current to the LED array, a timer connected to a controller wherein the timer... Agent: Sutherland Asbill & Brennan LLP

20090121655 - Terminal device and computer-readable storage medium: A CPU lights or extinguishes a display unit after the end of an interrupt event in accordance with a lighting state (lighting, dim-lighting, being unlighted) of the display unit when the occurrence of the interrupt event is detected. It is therefore possible for the CPU to perform appropriate display control... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20090121656 - Light source with optimized electrical, optical, and economical performance: An optimized light source and a method of manufacturing the same. The light source is made up of an array of individual lighting elements and is optimized for electrical, optical and economic performance, as well as a method for configuring such an array. The a process for selecting individual lighting... Agent: Darby & Darby P.C.

20090121658 - Method for generating mixed light colors: A method for avoiding physiological phenomena such as color separation or stroboscopic effects that occur under boundry conditions in the case of intermittent feeding in particular of light-emitting diodes, for additive superposition to form color-locus-variable mixed light, whereby the emission brightness that can be represented by a periodic duty ratio... Agent: Scully Scott Murphy & Presser, PC

20090121657 - Optical display systems and methods: Optical display systems and methods are disclosed.... Agent: Luminus Devices , Inc. C/o Wolf, Greenfield & Sacks , P.C.

20090115336 - Led signaling apparatus with infrared emission: An infrared signaling apparatus is disclosed, which utilizes high intensity solid state lighting elements, such as light emitting diodes (LEDs) to provide signaling for navigational as well as search/rescue applications employing night vision equipments.... Agent: Frank F. Tian

20090115337 - System and method for real time control of lighting system: A method for real time control of lighting system includes the steps of: providing a computer, a SCM (2), a digital-to-analog converter (3), and at least one power amplifier (41, 42, 43) connected to the digital-to-analog converter, each of the at least one power amplifiers connects with a lamp; receiving... Agent: PCe Industry, Inc. Att. Steven Reiss

20090115338 - Method of driving plasma display panel and plasma display apparatus thereof: The present invention relates to a plasma display apparatus and, more particularly, to a method of driving a plasma display panel. A plasma display apparatus according to an aspect of the present invention includes a plasma display panel including a plurality of scan electrodes and sustain electrodes formed on an... Agent: Ked & Associates, LLP

20090115339 - Apparatus and method for controlling driving of lamp: Disclosed are an apparatus and a method for controlling driving of a lamp. The apparatus for controlling driving of a lamp includes a plurality of lamps, a switching module for switching supplied power to output an alternating current (AC) signal, a trans-module for converting the alternating signal into high-voltage signals... Agent: Saliwanchik Lloyd & Saliwanchik A Professional Association

20090115340 - Method and system for eliminating dc bias on electrolytic capacitors and shutdown detecting circuit for current fed ballast: A system and method is provided that eliminates DC bias on at least one of a first electrolytic capacitor and a second electrolytic capacitor of a bipolar junction transistor (BJT) based inverter ballast having a shutdown control circuit in association with only one of at least two BJT switches. A... Agent: Fay Sharpe LLP

20090115341 - Lamp driving circuit: In a lamp driving circuit for operating a high intensity discharge lamp, an a commutation circuit comprises at least two switching devices. The switching devices are alternately switched active at a commutation frequency. The active switching device switches at a switching frequency. During an ignition mode, the switching frequency and... Agent: Philips Intellectual Property & Standards

20090115342 - Lighting system for illumination using cold cathode fluorescent lamps: A lighting system for illuminating a chamber in a building includes a lighting fixture suitable for being mounted onto a surface of the chamber, so that light emitted by at least one CCFL device mechanically supported by the fixture illuminates the chamber. The one CCFL device includes at least one... Agent: Davis Wright Tremaine LLP - San Francisco

20090115345 - High efficiency off-line linear power supply: A power supply circuit comprising a charge storage capacitor having a first capacitor terminal adapted to provide a power supply voltage of the power supply and a second capacitor terminal coupled to a circuit common; a first switching device having a first switching terminal adapted to be connected to a... Agent: Ostrolenk Faber Gerb & Soffen

20090115343 - Led power regulator with high-speed led switching: One embodiment of the invention includes a power regulator system. The system comprises at least one power switch configured to repeatedly couple an inductor to an input voltage to regulate a current flow through the inductor. The system also comprises a light-emitting diode (LED) configured to provide illumination based on... Agent: Texas Instruments Incorporated

20090115344 - Lighting apparatus driven by color coordinate selection module: Provided is a lighting apparatus driven by a color coordinate selection module, which can emit color light corresponding to a chromaticity on a color coordinate, which is selected by a user. The lighting apparatus includes a chromaticity selection unit for providing a chromaticity and color temperatures so that a user... Agent: Ipla P.A.

20090115346 - Pnp light emitting transistor and method: A semiconductor light-emitting transistor device, including: a bipolar pnp transistor structure having a p-type collector, an n-type base, and a p-type emitter; a first tunnel junction coupled with the collector, and a second tunnel junction coupled with the emitter; and a collector contact coupled with the first tunnel junction, an... Agent: Martin Novack

20090115347 - Current control circuit, led current control apparatus, and light emitting apparatus: A counter circuit increments a count value bit by bit in synchronization with a clock pulse received from an oscillating portion. A lower order decoder receives the count value output from the counter circuit, compares a bit or bits on a lower side with a set value 1, and outputs... Agent: Fish & Richardson P.C.

20090115348 - Light emitting device: The luminance of different colors of light emitted from EL elements in a pixel portion of a light emitting device is equalized and the luminance of light emitted from the EL elements is raised. The pixel portion of the light emitting device has EL elements whose EL layers contain triplet... Agent: Eric Robinson