Newly published LED-related US patent applications

US patent applications published June 9, 2005

For more information on these applications, paste the application number into the USPTO search page

1. Dynamic color mixing LED device
US patent application no. 20050122065
Assignee: Dialight Corp.
A dynamic color mixing LED device that includes a plurality of light emitting diode units. Each light emitting diode unit includes e.g. a first LED of a first color (e.g. red) and a second LED of a second color (e.g. green). A third LED of a third color (e.g. blue can also be provided). A controller supplies respective driving signals to each of the first LED, second LED, and third LEDs individually. The respective driving signals individually control relative intensity outputs of the respective first LED, second LED, and third LED. With such an individual control each of the light emitting diode units can be controlled to output different color signals.
Filed: December 5, 2003

2. Lighting device
US patent application no. 20050122064
Assignee: Gestion Proche, Inc
An LED lighting device is provided which is capable of being connected to a network and being controlled by a host computer also connected to the network. The lighting device has several lifespan expanding features such as including several extra LEDs such that as the LEDs of the lighting device degrade over time more LEDs can be turned on thus allowing a constant luminosity to be maintained.
Filed: January 21, 2005

3. Active matrix electroluminescent display devices, and their manufacture
US patent application no. 20050122288
Assignee: Philips
Physical barriers (are present between neighbouring pixels on a circuit substrate of an active-matrix electroluminescent display device, particularly with LEDs of organic semiconductor materials. In order to reduce parasitic capacitance in the circuit substrate, the invention forms these barriers with metal or other electrically-conductive material that provides at least part of the signal lines at a higher level than the circuit substrate. This conductive barrier material is connected to the matrix circuitry within the substrate but is insulated at least at the sides adjacent to the LEDs. Preferably, an inter-capacitance guard line is included in the circuit substrate between the signal lines and the circuitry in the substrate.
Filed: September 15, 2004

4. Light show ASIC
US patent application no. 20050122292
Assignee: Dialog Semiconductor Gmbh
A system and a method for visual, electronic communication and/or entertainment purposes, displaying a lightshow, which can, if desired, represent selected information/events have been achieved. Said lightshow/information is displayed using one or more LED modules comprising more than one, usually three, LEDs emitting each light in different primary colors of a color space. Thus a lightshow/information/events can be visually displayed using a multitude of colors, different brightness, by flashing, by activation of specific positions, and by ON/OFF intervals. Said LED modules are controlled by a circuit comprising a LED driver unit, controlling the light intensity of each LED, a sequencer to control said LED drivers, and a memory to store the patterns for the illumination, the sequence and the brightness. The LEDs can be preferably addressed in a multiplexing mode, thus the connection between the LED drivers and the LEDs can be simplified. A user could compose his own light show, saving and replaying them or downloading light shows from the Internet or via a phone. After the defined sequence is downloaded the circuit runs autonomously. The present invention can be used for communication between persons, between persons and machines and for fun purposes.
Filed: January 13, 2004

5. Linear LED array
US patent application no. 20050122293
A chain of LEDs is formed from link units connected by wire pairs in electrical circuit. At least one wire pair is connected to a link unit to form external power supply wires. Each link unit is made of a tray housing a PCB in the housing, and LEDs mounted on the PCB in electrical connection with the wire pairs. Cured waterproof resin inside the tray housing encases the printed circuit board, the wire pair connection point to the PCB and the lower half of the light emitting diode elements.
Filed: December 4, 2003

6. Year-round decorative lights with multiple strings of series-coupled bipolar bicolor leds for selectable holiday color schemes
US patent application no. 20050122718
A decorative lighting apparatus provides user-selectable color schemes corresponding to several holidays and other occasions and themes for year-round use. In one illustrative example, a decorative lighting apparatus includes a decorative light strand having a first wire with a first plurality of lamps coupled in series therealong, a second wire with a second plurality of lamps coupled in series therealong, a third wire with a third plurality of lamps coupled in series therealong, and a return wire coupled to ends of the first, the second, and the third wires. Each lamp of the first plurality has a first light-emitting diode (LED) device (e.g. red) which is coupled in parallel and in reverse orientation with a second LED device (e.g. orange/yellow), each lamp of the second plurality has a third LED device (e.g. blue) which is coupled in parallel and in reverse orientation with a fourth LED device (e.g. green), and each lamp of the third plurality has at least a fifth light-emitting diode (LED) device (e.g. white). Preferably, each lamp of the first and the second pluralities is a two-leaded bipolar, bicolor LED. The first, the second, and the third wires are positioned together such that each lamp of the first, the second, and the third pluralities are positioned adjacent to each other but sufficiently separated such that little or no color mixing occurs between the lamps. A controller includes a first output for controlling an illumination of a color in the first plurality of lamps, a second output for controlling an illumination of a color in the second plurality of lamps, and a third output for controlling an illumination of a color in the third plurality of lamps. The controller is adapted to control the first, the second, and the third outputs to provide a different color scheme in the first, the second, and the third pluralities of lamps for each user-selectable switch setting of a decorating selector, to provide various simultaneously-illuminated combinations of color.
Filed: January 11, 2005

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