Kamala Rajan, 70142 Hartford Ln, Upper Makefield, PA 18940

8432095, Apr 30, 2013

May 11, 2011

13/105770

Huiqing Pang - Newtown PA, US
Peter Levermore - Lambertville NJ, US
Kamala Rajan - Newtown PA, US
Emory Krall - Philadelphia PA, US
Ruiqing (Ray) Ma - Morristown NJ, US
Paul E. Burrows - Kennewick WA, US

Universal Display Corporation - Ewing NJ

H01J 1/62
H01J 63/04

313504, 313483, 313498, 313500, 313501, 313502, 313503, 313505, 313506

Systems and methods for the design and fabrication of OLEDs, including high-performance large-area OLEDs, are provided. Variously described fabrication processes may be used to deposit and pattern bus lines with a smooth profile and a gradual sidewall transition. Such smooth profiles may, for example, reduce the probability of electrical shorting at the bus lines. Accordingly, in certain circumstances, an insulating layer may no longer be considered essential, and may be optionally avoided altogether. In cases where an insulating layer is not used, further enhancements in the emissive area and shelf life of the device may be achieved as well. According to aspects of the invention, bus lines such as those described herein may be deposited, and patterned, using vapor deposition such as vacuum thermal evaporation (VTE) through a shadow mask, and may avoid multiple photolithography steps. Other vapor deposition systems and methods may include, among others, sputter deposition, e-beam evaporation and chemical vapor deposition (CVD). A final profile of the bus line may substantially correspond to the profile as deposited.

8564192, Oct 22, 2013

May 10, 2012

13/468414

Huiqing Pang - Newtown PA, US
Emory Krall - Philadelphia PA, US
Kamala Rajan - Newtown PA, US
Paul E. Burrows - Chatteroy WA, US
Ruiqing Ma - Morristown NJ, US
Peter Levermore - Belo Horizonte, BR

Universal Display Corporation - Ewing NJ

H01J 1/62
H01J 63/04

313504, 313483, 313500, 313501, 313502, 313503, 313505, 313506

Systems and methods for the design and fabrication of OLEDs, including high-performance large-area OLEDs, are provided. Variously described fabrication processes may be used to deposit and pattern bus lines and/or insulators using vapor deposition such as vacuum thermal evaporation (VTE) through a shadow mask, and may avoid multiple photolithography steps. Bus lines and/or insulators may be formed with a smooth profile and a gradual sidewall transition. Such smooth profiles may, for example, reduce the probability of electrical shorting at the bus lines. Other vapor deposition systems and methods may include, among others, sputter deposition, e-beam evaporation and chemical vapor deposition (CVD). A final profile of the bus line and/or insulator may substantially correspond to the profile as deposited. A single OILED devices may also be formed with relatively large dimension.

2007010, May 10, 2007

Nov 4, 2005

11/266181

Brian D'Andrade - Westampton NJ, US
Richard Hewitt - Ewing NJ, US
Kamala Rajan - Newtown PA, US
Vadim Adamovich - Lawrenceville NJ, US

H01J 1/62

313506000, 313504000

The present invention provides an OLED comprising two or more organic emissive layers electrically connected with a reflective conductive layer.

2009012, May 14, 2009

Nov 12, 2007

11/938651

Kamala RAJAN - Newtown PA, US
Ken URBANIK - Ewing NJ, US
Ruiqing MA - Morristown NJ, US
Brian D'ANDRADE - Westhampton NJ, US

UNIVERSAL DISPLAY CORP. - Ewing NJ

B05D 5/06
H01L 27/28

313504, 427 66

Charge transport enhancement layers and structures are provided that may improve the performance of organic devices, specifically organic light emitting devices. A charge transport enhancement layer may include a layer or an inorganic material, metal oxide, halide, and/or alkali disposed between two organic layers, and separated from the cathode by an intervening organic layer. One or more CTELs may be used, such as in an alternating stack of organic and CTEL layers. Surprisingly, it has been found that the use of one or more CTELs arranged in a stack with intervening organic layers may improve the performance of the device even where the layer is not directly adjacent to the cathode.

2012016, Jun 28, 2012

Dec 23, 2010

12/978213

Peter Levermore - Lambertville NJ, US
Emory Krall - Philadelphia PA, US
Jeffrey Silvernail - Yardley PA, US
Kamala Rajan - Newtown PA, US
Julia J. Brown - Yardley PA, US

Universal Display Corporation - Ewing NJ

H01J 1/62
F21V 5/00
H01J 9/24

313504, 445 24, 362330

Light extraction blocks, and OLED lighting panels using light extraction blocks, are described, in which the light extraction blocks include various curved shapes that provide improved light extraction properties compared to parallel emissive surface, and a thinner form factor and better light extraction than a hemisphere. Lighting systems described herein may include a light source with an OLED panel. A light extraction block with a three-dimensional light emitting surface may be optically coupled to the light source. The three-dimensional light emitting surface of the block may includes a substantially curved surface, with further characteristics related to the curvature of the surface at given points. A first radius of curvature corresponding to a maximum principal curvature kat a point p on the substantially curved surface may be greater than a maximum height of the light extraction block. A maximum height of the light extraction block may be less than 50% of a maximum width of the light extraction block. Surfaces with cross sections made up of line segments and inflection points may also be fit to approximated curves for calculating the radius of curvature.

2012018, Jul 19, 2012

Jan 12, 2012

13/349295

Ruiqing Ma - Morristown NJ, US
Huiqing Pang - Newtown PA, US
Peter Levermore - Lambertville NJ, US
Prashant Mandlik - Lawrenceville NJ, US
Jeffery Silvernail - Yardley PA, US
Kamala Rajan - Newtown PA, US
Jason Paynter - Bristol PA, US

Universal Display Corporation - Ewing NJ

H05B 37/00
H01J 9/00

315121, 445 58

A first device that may include a short tolerant structure, and methods for fabricating embodiments of the first device, are provided. A first device may include a substrate and a plurality of OLED circuit elements disposed on the substrate. Each OLED circuit element may include a fuse that is adapted to open an electrical connection in response to an electrical short in the pixel. Each OLED circuit element may comprise a pixel that may include a first electrode, a second electrode, and an organic electroluminescent (EL) material disposed between the first and the second electrodes. Each of the OLED circuit elements may not be electrically connected in series with any other of the OLED circuit elements.

2012028, Nov 15, 2012

May 12, 2011

13/106733

Huiqing Pang - Newtown PA, US
Peter Levermore - Lambertville NJ, US
Emory Krall - Philadelphia PA, US
Kamala Rajan - Newtown PA, US
Ruiqing (Ray) Ma - Morristown NJ, US
Paul E. Burrows - Kennewick WA, US

Universal Display Corporation - Ewing NJ

H01L 33/08
H01L 33/62

257 88, 438 34, 257E33062, 257E33066

Systems, and methods for the design and fabrication of OLEDs, including large-area OLEDs with metal bus lines, are provided. Various bus line design rules for large area OLED light panels may include mathematical models developed to optimize bus line design and/or layout on large area OLED light panels. For a given panel area dimension, target luminous emittance, OLED device structure and efficiency (as given by the JVL characteristics of an equivalent small area pixel), and electrical resistivity and thickness of the bus line material and electrode onto which the bus lines are disposed, a bus line pattern may be designed such that Fill Factor (FF), Luminance Uniformity (U) and Power Loss (PL) may be optimized. One general design objective may be to maximize FF, maximize U and minimize PL. Another approach may be, for example, to define minimum criteria for U and a maximum criteria for PL, and then to optimize the bus line layout to maximize FF. OLED panels including bus lines with different resistances (R) along a length of the bus line are also described.

2012031, Dec 20, 2012

Feb 3, 2010

13/575837

Jeffrey Silvernail - Yardley PA, US
Jason Paynter - Bristol PA, US
Kamala Rajan - Newtown PA, US

UNIVERSAL DISPLAY CORPORATION (027166) - Ewing NJ

H05B 33/06
H05B 33/10

313 46, 313504, 445 58

An organic light emitting device (OLED) configured to emit light uniformly over an emitting area and a method of making the OLED are disclosed. The OLED contains a substrate, an electrode disposed over the substrate, and a light-emitting structure containing an organic material. The light-emitting structure is in contact with the electrode. The OLED contains an electrically conductive cover substantially overlaying the electrode and an electrically conductive connecting material disposed between the electrically conductive cover and the electrode. The electrically conductive material provides an electrically conductive path connecting the electrically conductive cover and the electrode. The electrically conductive cover increases the overall uniformity of emitted light from the OLED.