1
Alexander I Krymski, Kwang Bo Cho: Look ahead rolling shutter system in CMOS sensors. Micro Technology, Dickstein Shapiro Morin & Oshinsky, October 26, 2004: US06809766 (77 worldwide citation)

A shutter system for a pixel array is disclosed. The system includes a read shift register, first and second reset shift registers, and a plurality of logic gates. The read shift register is configured to sequentially count rows of the pixel array from top to bottom, such that the read shift registe ...


2
Roger Panicacci, Barmak Mansoorian, Sandor Barna, Alexander I Krymski: Readout circuit with gain and analog-to-digital a conversion for image sensor. Micron Technology, Dickstein Shapiro Morin & Oshinsky, April 26, 2005: US06885396 (49 worldwide citation)

A CMOS imager includes an array of active pixel sensors, wherein each pixel is associated with a respective column in the array. The imager also includes multiple circuits for reading out values of pixels from the active sensor array. Each readout circuit can be associated with a respective pair of ...


3
Eric R Fossum, Alexander I Krymski, Roger A Panicacci, Christopher Clark: Digital exposure circuit for an image sensor. Micron Technology, Dickstein Shapiro Morin & Oshinsky, June 14, 2005: US06906745 (20 worldwide citation)

Automatic exposure adjusting device considers the image on a pixel-by-pixel basis. Each pixel is characterized according to its most significant bits. After the pixels are characterized, the number of pixels in any particular group is counted. That counting is compared with thresholds which set whet ...


4
Alexander I Krymski: Image sensor with pixels having multiple capacitive storage elements. Aptina Imaging Corporation, Dickstein Shapiro, April 13, 2010: US07697051 (17 worldwide citation)

An apparatus has a pixel that includes (i) a buffer transistor having an input, (ii) first and second capacitive storage elements each of which selectively can be coupled to the input of the buffer transistor, and (iii) a photosensitive element having an output which selectively can be coupled to th ...


5
Alexander I Krymski, Kwang Bo Cho: Look ahead rolling shutter system in CMOS sensors. Aptina Imaging Corporation, Dickstein Shapiro, August 11, 2009: US07573516 (15 worldwide citation)

A shutter system for a pixel array is disclosed. The system includes a read shift register, first and second reset shift registers, and a plurality of logic gates. The read shift register is configured to sequentially count rows of the pixel array from top to bottom, such that the read shift registe ...


6
Alexander I Krymski: Low-power signal chain for image sensors. Micron Technology, Dickstein Shapiro Morin & Oshinksy, March 29, 2005: US06873364 (13 worldwide citation)

A signal chain for an image sensor is disclosed. The signal chain includes photo sensing elements, pixel readout circuits, and an amplifier. Each pixel readout circuit receives a charge-induced signal and a reset signal from one of the photo sensing elements. The readout circuit computes a differenc ...


7
Alexander I Krymski: Method and apparatus for reducing kTC noise in an active pixel sensor (APS) device. Micron Technology, Dickstein Shapiro Morin & Oshinsky, July 12, 2005: US06917027 (13 worldwide citation)

An image sensing device, such as a CMOS Active Pixel Sensor (APS) device, includes an array of pixels. Each pixel includes a reset transistor connected between a photodetector and a supply voltage. In a readout operation, a signal integrated onto the photodetector is sampled onto a holding capacitor ...


8
Eric R Fossum, Alexander I Krymski, Roger A Panicacci, Christopher Clark: Digital exposure circuit for an image sensor. Micron Technology, Dickstein Shapiro, January 12, 2010: US07646407 (11 worldwide citation)

Automatic exposure adjusting device considers the image on a pixel-by-pixel basis. Each pixel is characterized according to its most significant bits. After the pixels are characterized, the number of pixels in any particular group is counted. That counting is compared with thresholds which set whet ...


9
Roger Panicacci, Barmak Mansoorian, Sandor Barna, Alexander I Krymski: Readout circuit with gain and analog-to-digital conversion for image sensor. Micron Technology, Dickstein Shapiro, July 17, 2007: US07245321 (10 worldwide citation)

A CMOS imager includes an array of active pixel sensors, wherein each pixel is associated with a respective column in the array. The imager also includes multiple circuits for reading out values of pixels from the active sensor array. Each readout circuit can be associated with a respective pair of ...


10
Alexander I Krymski: Wide dynamic range operation for CMOS sensor with freeze-frame shutter. Micron Technology, Dickstein Shapiro Morin & Oshinsky, May 23, 2006: US07050094 (10 worldwide citation)

Wide dynamic range operation is used to write a signal in a freeze-frame pixel into the memory twice, first after short integration and then after long integration. The wide dynamic range operation allows the intra-scene dynamic range of images to be extended by combining the image taken with a shor ...