Daniel R Lau, Age 86PO Box 51, Soda Springs, ID 83276

6493112, Dec 10, 2002

Jan 11, 1999

09/228573

Gonzalo R. Arce - Wilmington DE
Daniel L. Lau - Newark DE

University of Delaware - Newark DE

H04N 140

358 319, 358 313

A method and apparatus for producing halftone images which utilizes the advantageous stochastic patterning of dots found in frequency-modulated, blue-noise masks, and avoids the problem of dot gain provided in amplitude-modulated masks. Here a green-noise spectrum is used to generate a dither mask and the halftone patterns for each gray-level are subjected to the stacking constraint. The filters used in building the green-noise masks comprise filters using the conventional blue-noise mask for a coarseness parameter Mâ(g)=1 and filters having a principle frequency f less than the principle frequency of blue-noise f when coarseness parameter Mâ(g) 1. Unlike blue-noise dither patterns, green-noise dither patterns comprise pixel clusters, making them less susceptible to image degradation from dot gain, generating dot-profiles that are visually pleasing to the human eye.

6798537, Sep 28, 2004

Jan 24, 2000

09/489648

Daniel L. Lau - New Castle DE
Gonzalo R. Arec - Wilmington DE
Neal C. Gallagher - Fort Collins CO

The University of Delaware - Newark DE

B41B 100

358 19, 358 303, 358 322, 358534, 358 321, 358 324, 382252, 382270

Disclosed are two novel techniques for digital color halftoning with green-noise stochastic dither patterns generated by homogeneously distributing minority pixel clusters. The first technique employs error diffusion with output-dependent feedback such that the overlapping of pixels of different colors can be regulated for increased color control. The second technique uses a green-noise mask which is a dither array designed to create green-noise halftone patterns. The green-noise mask is constructed to also regulate the overlapping of different colored pixels. As is the case with monochrome image halftoning, both techniques are tunable, allowing for large clusters in printers with high dot-gain characteristics, and small clusters in printers with low dot-gain characteristics.

7247933, Jul 24, 2007

Feb 3, 2004

10/542211

Frank J. Juskey - Apopka FL, US
Daniel K. Lau - San Francisco CA, US

Advanced Interconnect Technologies Limited - Fort Louis

H01L 23/02
H01L 21/00

257686, 257685, 257E25006, 257E25013, 257E25018, 257E25021, 257E25027, 257E23085, 257E21614, 438109

A method and apparatus for forming a multiple semiconductor die assembly () having a thin profile are presented. The semiconductor die assembly () comprises a plurality of die packages (), with each die package () including a lead frame () having a plurality of leads () each having a down set portion () extending from (). A semiconductor die () is disposed in a central region () of the lead frame () and is electrically connected (). An encapsulant () is disposed in the central region () and covers to the semiconductor die () and a portion (). The first surface () of the leads () and a first surface () of the semiconductor die () are substanial exposed from the encapsulant (). The first surface () of the semiconductor die () and the down set portions () form a cavity (). The semiconductor die packages () are stacked such that at least a portion of the encapsulant () is disposed in the cavity of a next higher semiconductor die package () in the stack.

7489021, Feb 10, 2009

Feb 17, 2004

10/563172

Frank J. Juskey - Apopka FL, US
Daniel K. Lau - San Francisco CA, US
Lawrence R. Thompson - San Jose CA, US

Advanced Interconnect Technologies Limited - Port Louis

H01L 23/495
H01L 23/34
H01L 21/00

257666, 257676, 257684, 257693, 257698, 257723, 257924, 438106, 438123, 438 51, 438 54, 438108

An semiconductor device package () includes a semiconductor device (die) () and passive devices () electrically connected to a common lead frame (). The lead frame () is formed from a stamped and/or etched metallic structure and includes a plurality of conductive leads () and a plurality of interposers (). The passive devices () are electrically connected to the interposers (), and I/O pads () on the die () are electrically connected to the leads (). The die (), passive devices (), and lead frame () are encapsulated in a molding compound (), which forms a package body (). Bottom surfaces () of the leads () are exposed at a bottom face () of the package ().

2019008, Mar 21, 2019

Nov 2, 2018

16/178745

Gonzalo R. Arce - Newark DE, US
Gonzalo Garateguy - Framingham MA, US
Sean Xiaolu Wang - Wilmington DE, US
Daniel L. Lau - Lexington KY, US

Graphiclead LLC - Newark DE

G06K 19/06

The present invention embodies a technique, referred to as Secure QR Codes, which not only provides aesthetically enhanced QR codes but also allows for security. It can embed a standard black and white QR code, referred to as a public QR code, and a secret QR code, both into a secure QR code. The secure QR code produced is composed of colored cells. The public black and white QR code must first be, either aesthetically enhanced into an enhanced colored QR code, or transformed into a colored QR code with cells of uniform color obtained by transforming each of the black and white cells of the public QR code into cells that takes a color from a subset of possible colors, such that the luminance of each colored cell approximates accurately the black or white luminance values of the public QR code.

2017007, Mar 16, 2017

Sep 8, 2016

15/259460

Gonzalo R. Arce - Newark DE, US
Gonzalo Garateguy - Framingham MA, US
Sean Xiaolu Wang - Wilmington DE, US
Daniel L. Lau - Lexington KY, US

Graphiclead LLC - Newark DE

G06K 7/14
G06K 1/12
G06K 19/06

The present invention embodies a technique, referred to as Secure QR Codes, which not only provides aesthetically enhanced QR codes but also allows for security. It can embed a standard black and white QR code, referred to as a public QR code, and a secret QR code, both into a secure QR code. The secure QR code produced is composed of colored cells. The public black and white QR code must first be, either aesthetically enhanced into an enhanced colored QR code, or transformed into a colored QR code with cells of uniform color obtained by transforming each of the black and white cells of the public QR code into cells that takes a color from a subset of possible colors, such that the luminance of each colored cell approximates accurately the black or white luminance values of the public QR code.