1
Robin Mark Adrian Dawson, Michael Gillis Kane, James Ya Kong Hsu, Fu Lung Hsueh, Alfred Charles Ipri, Roger Green Stewart: Active matrix light emitting diode pixel structure and concomitant method. Sarnoff Corporation, William J Burke, May 8, 2001: US06229506 (665 worldwide citation)

A LED pixel structure that reduces current nonuniformities and threshold voltage variations in a “drive transistor”of the pixel structure is disclosed. The LED pixel structure incorporates a current source for loading data into the pixel via a data line. Alternatively, an auto zero voltage is determ ...


2
Brent W Brown: Solid state color display system and light emitting diode pixels therefor. Integrated Systems Engineering, February 2, 1993: US05184114 (293 worldwide citation)

Wide color range display systems comprising integrated, phase modulated light from three light emitting diode (LED) pixels. Each pixel comprises a large number of LED chips arranged compactly to provide a discrete element light source of sufficient output to be viewed as a point source of light from ...


3
David R Yoksza, Thomas M Waltz: Replaceable intelligent pixel module for large-scale LED displays. Trans Lux Corporation, Kane Dalsimer Sullivan Kurucz Levy Eisele and Richard, April 25, 1995: US05410328 (251 worldwide citation)

The apparatus is a detachable LED module which is used to display a pixel on a display. The LED module includes a rear wall and side walls. A plurality of LEDs along with a processor with input and output capabilities are contained within the LED module. The rear wall includes an aperture to receive ...


4
Webster E Howard, Olivier Prache: OLED active matrix using a single transistor current mode pixel design. Fed Corporation, Collier Shannon Rill & Scott PLLC, February 8, 2000: US06023259 (234 worldwide citation)

The present invention is a current driver for an active matrix organic light emitting device display. As embodied herein, the driver relies upon a single transistor, driven in a saturation regime to provide a current source for an OLED. This results in a pulse drive. The driver of the present invent ...


5
Robert E Gleason: Active matrix light emitting diode display. Agilent Technologies, May 21, 2002: US06392617 (216 worldwide citation)

An active matrix pixel within an active matrix display includes a photodiode that is optically connected to a light emitting diode within the pixel in order to detect a portion of the luminous flux that is generated by the light emitting diode. The photodiode discharges excess charge within the pixe ...


6
Chan Long Shieh, Hsing Chung Lee, Franky So: Active driven LED matrices. Mororola, Eugene A Parsons, May 5, 1998: US05748160 (212 worldwide citation)

A matrix of light emitting devices including a voltage source constructed to repetitiously supply a multi-step voltage waveform and a matrix of rows and columns of pixels, each pixel being connected to the voltage source. A method of driving the matrix including addressing each of the pixels of the ...


7
Andrew D Arnold, Ronald S Cok: OLED display with aging compensation. Eastman Kodak Company, Andrew J Anderson, February 7, 2006: US06995519 (183 worldwide citation)

An organic light emitting diode (OLED) display includes an array of OLEDs, each OLED having two terminals; a voltage sensing circuit for each OLED including a transistor in each circuit connected to one of the terminals of a corresponding OLED for sensing the voltage across the OLED to produce feedb ...


8
Frederick Marshall Morgan, Ihor Lys: Diffuse illumination systems and methods. Philips Solid State Lighting Solutions, Wolf Greenfield & Sacks P C, April 1, 2008: US07352339 (175 worldwide citation)

The systems and methods disclosed herein relate to sources of diffuse illumination for providing substantially uniform illumination to a surface. The diffuse illumination arises from varying the diffusion angle of light generated by an LED system. To vary the diffusion angle, a translucent member is ...


9
Michael Simon, Benjamin Roque: Light-emitting diode display system. Alfred A Equitz, December 12, 1989: US04887074 (174 worldwide citation)

A computer-controlled LED display system including an N.times.M rectangular array of light units. Each light unit includes one or more LED's that are driven so as to emit a train of light pulses separated by intervals of substantially zero light intensity. The temperature of the LED cathodes will de ...


10
Ronald S Cok, Thomas Niertit, Andrew D Arnold: OLED display with aging compensation. Eastman Kodak Company, David A Novais, Andrew J Anderson, Stephen H Shaw, January 22, 2008: US07321348 (171 worldwide citation)

An organic light-emitting diode (OLED) display having addressable pixels on a substrate, the pixels having performance attributes, and a control circuit for controlling the pixels of the display device, includes one or more OLED pixels; an OLED reference pixel located on a substrate and connected to ...