|PIXIM, INC. Patent applications|
|Patent application number||Title||Published|
|20130258151||CMOS Image Sensors Implementing Full Frame Digital Correlated Double Sampling with Global Shutter - An active pixel CMOS image sensor implements full frame digital correlated double sampling (CDS) with global shutter where all the pixels in the image sensor are reset at substantially the same time and all the pixels in the image sensor integrate incident light at substantially the same time and for substantially the same time duration and correlated double sampling cancellation is performed in the digital domain. In one embodiment, the image sensing device includes an array of light sensing elements, a timing and control circuit and analog-to-digital converters. The timing and control circuit is operative to reset the light sensing elements in the array and to control the array of light sensing elements to integrate incident light. The pixel reset values are cancelled from the corresponding light dependent pixel values for each of the light sensing elements to generate correlated double sampling (CDS) corrected digital output pixel values.||10-03-2013|
|20130020466||Conversion Gain Modulation Using Charge Sharing Pixel - An image sensor including an array of pixel elements is operated according to two operation modes to modulate the conversion gain of the pixel to operate the image sensor based on the impinging light conditions. More specifically, an image sensor pixel element is operated in a high conversion gain mode for low light conditions and in a low conversion gain mode for bright light conditions. The low conversion gain mode implements charge sharing between the floating diffusion and the photodiode. The low conversion gain mode further implements partial reset where the photodiode and the floating diffusion are reset to the same potential and to a potential slightly less than the pinning voltage of the photodiode.||01-24-2013|
|20110228097||Image Sensor Including Color and Infrared Pixels - An image sensing system includes an IR notch filter configured to block transmission of spectral energy having wavelengths in an interface region between the visible and the invisible spectra and enable transmission of spectral energy having wavelengths in at least the visible spectrum and the near-infrared (IR) spectrum, a digital image sensor including a two-dimensional array of pixel elements and configured to generate output signals at each pixel element as pixel data representing an image of a scene, and a color filter array including a two-dimensional array of selectively transmissive filters superimposed on and in registration with the two-dimensional array of pixel elements. The color filter array includes a first group of selectively transmissive filters disposed to transmit spectral energy in one or more colors of the visible spectrum and a second group of gray color filters disposed to transmit spectral energy in at least the near-infrared (IR) spectrum.||09-22-2011|
|20100302407||Image Sensor with Sensitivity Control and Sensitivity based Wide Dynamic Range - In one embodiment, a method for sensing an image of a scene includes receiving incident light at a image sensing device including an array of at least two regions of pixel elements, providing one or more control parameters where each of the control parameters modifies the sensitivity of the pixel elements, generating control signals for the one or more control parameter for each region of pixel elements where the sensitivity of the pixel elements is varied on a region by region basis. In another embodiment, method for sensing an image of a scene includes generating control signals for controlling two or more control parameters for controlling the pixel elements of an entire array to provide continuous fine grain control of the sensitivity of the pixel elements.||12-02-2010|
Patent applications by PIXIM, INC.