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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7420332 | LED lighting device A first LED array including a first capacitor, LED blocks, and a second capacitor that are connected in series with each other, a second LED array having a similar configuration to the first LED array, and a third LED array having a similar configuration to the firs... | 09/02/2008 |
| 7372215 | Lamp ballast for circuit driving multiple parallel lamps A lamp ballast circuit for driving, e.g. four flourescent lamps with a ballast control IC such as the IR2167 Ballast Control IC. The circuit includes a lamp replacement detection circuit for detecting insertion of a lamp, and in response, controlling the ballast con... | 05/13/2008 |
| 7372214 | Apparatus and method for driving lamp of liquid crystal display device A lamp driving apparatus of a liquid crystal display includes a plurality of lamps arranged with a predetermined distance between adjacent lamps; a comparator to compare output voltages of lamps that are separated by more than the lamp distance; and a power intercep... | 05/13/2008 |
| 7372055 | Night vision infrared illuminator An illuminator assembly is provided for supplying night vision illumination. The assembly includes a support housing and an infrared illumination source. An infrared reflector receives the radiation emitted from the infrared illumination source and reflects the infr... | 05/13/2008 |
| 7345431 | Circuit structure for driving a plurality of cold cathode flourescent lamps A DC/AC converter circuit structure for driving a plurality of cold cathode fluorescent lamps is described. A common-mode choke is used between the cold cathode fluorescent lamps. The common-mode choke balances the currents respectively flowing through the cold cath... | 03/18/2008 |
| 7327100 | Discharge lamp lighting apparatus A discharge lamp lighting apparatus for lighting a discharge lamp having two electrodes includes a first drive circuit, a second drive circuit, and a control circuit. The first drive circuit is connectable to one of the two electrodes to supply a first alternating c... | 02/05/2008 |
| 7321207 | Inverter apparatus and liquid crystal display including inverter apparatus An inverter apparatus for driving a plurality of lamp units including a plurality of lamps is provided. The inverter apparatus includes a plurality of inverters. Each inverter includes a delay block delaying an input ON/OFF signal to generate an output ON/OFF signal... | 01/22/2008 |
| 7190123 | Circuit structure for driving a plurality of cold cathode fluorescent lamps A DC/AC converter circuit structure for driving a plurality of cold cathode fluorescent lamps is described. A common-mode choke is used between the cold cathode fluorescent lamps. The common-mode choke balances the currents respectively flowing through the cold cath... | 03/13/2007 |
| 7098612 | Frequency synchronization device for LCD lamps A frequency synchronization device for a large LCD having a plurality of lamps as a background light source is disclosed. The device comprises a power amplification unit wherein one power amplification unit is electrically coupled to another amplification unit, each... | 08/29/2006 |
| 7064496 | State detection device A state detection device is disclosed that is for detecting driving states of plural loads which are connected with each other in parallel and are driven by a driving unit. The state detection device includes a voltage detection unit for detecting voltages applied t... | 06/20/2006 |
| 7042173 | Controllable lighting system with a second communication protocol and appliances for this purpose The invention relates to an electronic ballast and to a controller which drives this ballast, in which two communication protocols are provided for the digital drive. ... | 05/09/2006 |
| 7009348 | Multiple channel ballast and networkable topology and system including power line carrier applications Control systems and methods for independent control of power systems, particularly lighting network branches, and separate control of individual branch components. Multi-branch systems comprise independently controllable branches that inter-communicate via PLC commu... | 03/07/2006 |
| 6943506 | Inverter apparatus and liquid crystal display including inverter apparatus An inverter apparatus for driving a plurality of lamp units including a plurality of lamps is provided. The inverter apparatus includes a plurality of inverters. Each inverter includes a delay block delaying an input ON/OFF signal to generate an output ON/OFF signal... | 09/13/2005 |
| 6680588 | Low noise backlight system for use in display device and method for driving the same Disclosed is a backlight system and a method for driving backlight capable of reducing noises and voltage fluctuations in power voltage due to a turn-on/turn-off of the lamp. The backlight system includes two lamps, a power supply unit for supplying alter... | 01/20/2004 |
| 6650058 | Vehicle head light or auxiliary light assembly A vehicle head light or auxiliary light assembly (10) that includes an inner housing (12) and an outer housing (30), wherein located between the inner and outer housings (12,30) is a light passage channel (46). At the center of the inner housing (12) is a... | 11/18/2003 |
| 6597130 | Driving apparatus of discharge tube lamp A driving apparatus of a discharge tube lamp includes a voltage source; a plurality of AC conversion circuits for boosting a voltage supplied from the voltage source and generating a plurality of boosted AC signals; a plurality of discharge tubes for rece... | 07/22/2003 |
| 6483260 | Apparatus for operating respective single lamps among multiple lamps coupled to the same ballast An apparatus and method are provided for operating one of a plurality of lamps employed within a luminaire via a single ballast, thereby extending the operational life of the luminaire. The operating lamp disables the lamps downstream from itself by preve... | 11/19/2002 |
| 5818175 | Gas discharge image display In the gas discharge image display of this invention, the peak value of a write pulse supplied to one of two electrodes of each of fluorescent lamps aligned in a matrix form is substantially equal to the peak value of a sustain pulse supplied to that elec... | 10/06/1998 |
| 5786657 | Field emission electron gun capable of minimizing nonuniform influence of surrounding electric potential condition on electrons emitted from emitters In a field emission electron gun including emitters (104) on predetermined parts of a substrate (409), an insulator film (105) on a remaining part of the substrate, a first gate electrode (101) on the insulator film so as to surround the emitters with a s... | 07/28/1998 |
| 5216334 | Display bias arrangement An improved display bias arrangement is provided using a DC filament voltage in conjunction with stepped grid voltages to maintain even illumination. In a VF display there is a directly heated cathode (filament), an anode and a grid. If a DC filament volt... | 06/01/1993 |
| 5023517 | Light controller apparatus A light driver circuit which is activated by an audio signal. The circuit includes three signal channels and four automatic level control circuits. The three channels are high, low and mid-range frequency channels. There is an automatic level control circ... | 06/11/1991 |
| 4942337 | Spark gap apparatus triggerable by microwave pulse A spark gap apparatus triggerable by application of a microwave pulse. The apparatus includes a first electrode including a microwave waveguide, and a second electrode spaced from the first electrode. A microwave generator is connected to supply microwave... | 07/17/1990 |
| 4902939 | Display circuit A discharge tube opening circuit for varying tube intensity at regular intervals without flicker between an illuminated and an unilluminated state. Combinations of tubes controlled by respective circuits give rise to novel display arrangements through cho... | 02/20/1990 |
| 4404498 | Multiplex strobe light A multiplex strobe light in which several ionized gas flash tubes are fed in parallel from a common power and trigger circuit. The common power circuit has a capacitor which is connected across a charging voltage and all of the flash tubes. The common tri... | 09/13/1983 |
| 4326150 | Cathode ray tube device for display system Each of picture elements on a color display system is formed of a triad of small monochromatic cathode ray tubes luminescing in red, green and blue in response to unfocused electron beams from respective electron guns and disposed in a cylindrical housing... | 04/20/1982 |
| 4103208 | Fluorescent tube display calculators In one preferred form of calculators, a multi-digit fluorescent display tube and an LSI semiconductor chip together are disposed on a printed circuit flexible film. More particularly, individual components of the multi-digit fluorescent display tube (that... | 07/25/1978 |
| 3973168 | Wiring circuits and method for multiple flash-beacons A plurality of flash units mounted as warning, navigational or signal beacons are driven from a remote energy storage power converter with reduced number and or size of discharge current cables by common use of cables combined with sequential flashing suc... | 08/03/1976 |
