Patents Assigned to Luxell Technologies Inc.
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Patent number: 7372436Abstract: The present invention introduces a novel design for active matrix displays, utilizing both organic light-emitting diode (OLED) and thin-film electroluminescent technologies. In a first aspect there is provided a top-emitting OLED, including an optical interference contrast-enhancing stack that is placed on the top of the driving thin-film transistor, and which extendes to the entire pixel area to cover the reflecting parts of the pixel. In a second aspect, there is provided a bottom-emitting OIED wherein an optical interference contrast-enhancing stack is placed right under the driving thin-film transistor and, separately between the organic stack and the top electrode, typically a cathode. The optical interference contrast-enhancing stack suppresses light reflection from the thin-film transistor and the upper electrode.Type: GrantFiled: June 11, 2003Date of Patent: May 13, 2008Assignee: Luxell Technologies, Inc.Inventors: Alexey N. Krasnov, Richard P. Wood, David J. Johnson, Peter G. Hofstra
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Publication number: 20070159080Abstract: A new transparent-charge-injection-layer consisting of LiF/Al/Al-doped-SiO has been developed as (i) a cathode for top emitting organic light-emitting diodes (TOLEDs) and as (ii) a buffer layer against damages induced by energetic ions generated during deposition of other functional thin films by sputtering, or plasma-enhanced chemical vapor deposition. A luminance of 1900 cd/m2 and a current efficiency of 4 cd/A have been achieved in a simple testing device structure of ITO/TPD (60 nm)/Alq3 (40 nm)/LiF (0.5 nm)Al (3 nm)/Al-doped-SiO (30 nm). A thickness of 30 nm of Al-doped SiO is also found to protect organic layers from ITO sputtering damage.Type: ApplicationFiled: November 21, 2003Publication date: July 12, 2007Applicant: Luxell Technologies, Inc.Inventors: Sijin Han, Xiadong Feng, Zhenghong Lu, Richard Wood, David Johnson
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Patent number: 7161651Abstract: A method of resizing a liquid crystal display connected to at least one flex board, wherein the liquid crystal display has multiple layers including a liquid crystal layer contained between a pair of glass substrates and a pair of polarizers on opposite sides of respective ones of the glass substrates. The method comprises applying pressure sensitive tape for protecting the polarizers, dicing through the layers, including the polarizers, using a dicing wheel with predetermined diamond particle size to a specified depth and width of groove, cutting through the flex board using a UV laser, breaking off unwanted portions of the liquid crystal display and flex board defined by the dicing and cutting operations, and sealing remaining portions of the liquid crystal display.Type: GrantFiled: November 20, 2004Date of Patent: January 9, 2007Assignee: Luxell Technologies Inc.Inventor: Anatoliy Smovzh
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Patent number: 6806639Abstract: An electroluminescent device having high-contrast and/or high-reliability is provided. The electroluminescent device comprises a pair of electrodes—at least one of which is transparent to electroluminescent light, and a phosphor layer which is disposed between the electrodes. The phosphor layer has a host crystal lattice, a first dopant and a second dopant. The first dopant cooperates with the host crystal lattice to cause light emission when a voltage is applied across the pair of electrodes, and the second dopant further distributes the first dopant in the host crystal lattice to increase light emission from the phosphor layer.Type: GrantFiled: July 30, 2002Date of Patent: October 19, 2004Assignee: Luxell Technologies, Inc.Inventors: Alexey N. Krasnov, Peter Hofstra, Richard P. Wood
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Patent number: 6784602Abstract: The present invention provides a novel organic electroluminescent device having an optical interference member which reduces the overall reflectance from the device. The invention is particularly suited to current-driven organic displays having an anode, an electroluminescent layer and a cathode, where at least one optical interference member is placed between two of the layers and thus forms part of the electrical circuit required to excite the display. The optical interference member is chosen to have a thickness which causes at least some destructive optical interference of ambient light incident on the display. In addition, the material(s) of the optical interference member are chosen to have a work function which is compatible with the highest occupied molecular orbital, or the lowest unoccupied molecular orbital of the electroluminescent layer, depending on the location of the optical interference member in relation to the anode, cathode and electroluminescent layer.Type: GrantFiled: October 25, 2001Date of Patent: August 31, 2004Assignee: Luxell Technologies Inc.Inventors: Peter G. Hofstra, Alexey Krasnov
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Patent number: 6653664Abstract: Bandgap engineering of thin-film electroluminescent (TFEL) devices increases their efficiency and brightness. An alternating current thin-film electroluminescent display has two stacked dielectrics, a semiconductor active layer therebetween, and metallic cladding electrodes at each side thereof. The semiconductor layer is developed by automated thermal co-evaporation so as to provide a monotonic decrease of the band gap thereof from the respective interfaces with the stacked dielectrics to the middle of the semiconductor active layer so that the dopant concentration thereof is maintained at about 0.7 %.Type: GrantFiled: May 7, 2002Date of Patent: November 25, 2003Assignee: Luxell Technologies, Inc.Inventor: Alexey N. Krasnov
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Patent number: 6551651Abstract: The present invention provides a novel organic electroluminescent device having an optical interference member which reduces the overall reflectance from the device. The invention is particularly suited to current-driven organic displays having an anode, an electroluminescent layer and a cathode, where at least one optical interference member is placed between two of the layers and thus forms part of the electrical circuit required to excite the display. The optical interference member is chosen to have a thickness which causes at least some destructive optical interference of ambient light incident on the display. In addition, the material(s) of the optical interference member are chosen to have a work function which is compatible with the highest occupied molecular orbital, or the lowest unoccupied molecular orbital of the electroluminescent layer, depending on the location of the optical interference member in relation to the anode, cathode and electroluminescent layer.Type: GrantFiled: October 25, 2001Date of Patent: April 22, 2003Assignee: Luxell Technologies, Inc.Inventors: Peter G. Hofstra, Alexey Krasnov
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Patent number: 6411019Abstract: The present invention provides a novel organic electroluminescent device having an optical interference member which reduces the overall reflectance from the device. The invention is particularly suited to current-driven organic displays having an anode, an electroluminescent layer and a cathode, where at least one optical interference member is placed between two of the layers and thus forms part of the electrical circuit required to excite the display. The optical interference member is chosen to have a thickness which causes at least some destructive optical interference of ambient light incident on the display. In addition, the material(s) of the optical interference member are chosen to have a work function which is compatible with the highest occupied molecular orbital, or the lowest unoccupied molecular orbital of the electroluminescent layer, depending on the location of the optical interference member in relation to the anode, cathode and electroluminescent layer.Type: GrantFiled: July 27, 1999Date of Patent: June 25, 2002Assignee: Luxell Technologies Inc.Inventors: Peter G. Hofstra, Alexey Krasnov