1
Zhonghan John Deng, David Xiao Dong Yang, Odutola Oluseye Ewedemi: Digital image sensor with on -chip programmable logic. Pixim, Joe Zheng, Beyer Weaver & Thomas, August 17, 2004: US06778212 (75 worldwide citation)

An image sensor, including a substrate having formed thereon by a CMOS process a digital sensor array having a plurality of digital pixel sensors which output analog signals corresponding to a desired image. The digital sensor array further includes supporting circuitry for converting the analog sig ...


2
Michael Frank, Ricardo J Motta, Justin Reyneri, David Xiao Dong Yang, William R Bidermann, Odutola Oluseye Ewedemi: Video imaging system including a digital image sensor and a digital signal processor. PIXIM, Patent Law Group, Carmen C Cook, January 27, 2009: US07483058 (59 worldwide citation)

A video imaging system includes a digital image sensor for performing image capture operations and a digital image processor for performing image processing operations. The digital image sensor includes a sensor array outputting digital pixel data, an image buffer for storing the pixel data, a first ...


3
Zhonghan Deng, David Xiao Dong Yang, Xi Peng, Odutola Oluseye Ewedemi, Ricardo Jansson Motta, Yi Hen Wei: Method and apparatus for optimizing exposure time in image acquisitions. PIXIM, Lumen Intellectual Property Services, July 20, 2004: US06765619 (54 worldwide citation)

A method of optimizing the exposure times of regions of pixels of an image sensor array during exposure is accomplished by utilizing time interval sampling of an image sensor array comprising of pixels configured to generate digital image signals. Luminance values are extracted from each digital ima ...


4
Hui Tian, David Xiao Dong Yang: Selective analog-to-digital conversion for a digital pixel sensor. Pixim, Carmen C Cook, Patent Law Group, December 24, 2002: US06498576 (53 worldwide citation)

A system and method for performing low-power analog-to-digital conversion in digital imaging system utilizing a time-indexed multiple sampling technique is presented. The analog-to-digital converter is switched off when the digital image signal resulting from an exposure time selected from a plurali ...


5
David Xiao Dong Yang, William R Bidermann: Multiplexed multi-channel bit serial analog-to-digital converter. PiXim Incorporated, Carmen C Cook, Skjerven Morrill MacPherson, October 30, 2001: US06310571 (42 worldwide citation)

A circuit includes an analog-to-digital (A/D) converter for multiplexing between a number of analog input signals and converting the selected analog input signals to a digital code representation. The A/D converter includes a comparator having a first input terminal connected to receive the first si ...


6
David Xiao Dong Yang, William R Bidermann: Analog-to-digital converter with multiplexed input channels. Pixim, Carmen C Cook, Patent Law Group, February 11, 2003: US06518909 (42 worldwide citation)

A circuit includes an analog-to-digital (A/D) converter for multiplexing between a number of analog input signals and converting the selected analog input signals to a digital code representation. The A/D converter includes a comparator having a first input terminal connected to receive the first si ...


7
David Xiao Dong Yang: Dual ported memory for digital image sensor. Pixim, Joe Zheng, September 14, 2004: US06791611 (40 worldwide citation)

An image sensor architecture that accommodates the relative mismatch of bus width between the image sensor, processor, and memory is disclosed. The preferred embodiment of the invention provides a dual-ported memory structure having a relatively wide data port for receiving data from the image senso ...


8
Yu Xia, Qianjiang Huai, Hao Wang, David Xiao D Yang, Zhonghan Deng: Method and system for transmitting data based on two-dimensional symbol technologies. Vimicro Corporation, Joe Zheng, February 12, 2008: US07328848 (39 worldwide citation)

Techniques for transmitting data between devices based on two-dimensional symbols are disclosed, where the devices are generally not equipped with the traditional networking capabilities, or at least these traditional networking capabilities are not used for the data communication. According to one ...


9
David Xiao Dong Yang, Zhonghan Deng: Multiple sampling via a time-indexed method to achieve wide dynamic ranges. Pixim, Carmen C Cook, Patent Law Group, December 13, 2005: US06975355 (36 worldwide citation)

An architecture for a digital pixel sensor is disclosed in which the dynamic range of the sensor is increased by taking samples of a subject to be recorded, where each sample is taken over an interval of a different duration than the other samples. In the preferred embodiment of the invention, an ar ...


10
William R Bidermann, David Xiao Dong Yang: Digital image sensor with improved color reproduction. Pixim, Carmen C Cook, Patent Law Group, November 29, 2005: US06970195 (36 worldwide citation)

An image sensor includes a sensor array including a two-dimensional array of pixel elements. The array of pixel elements includes a first group of photodetectors having a first sensitivity level and a second group of photodetectors having a second sensitivity level. The sensor array outputs digital ...