Omnivision Technologies Patent Grants

Imaging systems and methods for using in spatially constrained locations

Granted: September 12, 2017
Patent Number: 9757015
An imaging system for use in a spatially constrained location includes an image sensor for capturing an image, wherein the image sensor has (a) a first rectangular area containing a pixel array and connecting circuitry communicatively coupled with the pixel array and (b) a second rectangular area with only one shared side with the first rectangular area and containing support electronics for pixel array control and signal acquisition, where the support electronics is communicatively…

Application specific, dual mode projection system and method

Granted: September 12, 2017
Patent Number: 9759554
A projector panel includes pixel display, a display controller, and a pattern generator. The pattern generator is operative to output pixel data indicative of at least one application specific predetermined pattern. In a particular embodiment, the projector panel is a liquid-crystal-on-silicon panel. In another particular embodiment, the projector panel is adapted for selective use in either structured light projection systems or conventional video projection systems.

Method and system for reducing analog-to-digital conversion time for dark signals

Granted: September 12, 2017
Patent Number: 9762825
A method for reducing ADC time for dark signals starts with pixel array capturing image data of frames including first frame and second frame. Pixel array includes visible pixels and black pixels (OPB). Scanning circuitry then selects OPB of first frame to be readout. OPB generate a dark signal when selected by scanning circuitry. Column readout circuitry included in readout circuitry then acquires the dark signal of first frame and processes the dark signal based on a ramp signal…

Adaptive body biasing circuit for latch-up prevention

Granted: September 12, 2017
Patent Number: 9762833
Techniques and methods for reducing or preventing latch up in row decoder circuits are disclosed herein. An example apparatus may include an array of pixels, a row address decoder, and control circuitry. The row decode circuit including a plurality of decode circuits, each including at least two transistors having respective body terminals coupled to a first node. The control circuitry including a body biasing circuit coupled to the first node, the body biasing circuit to adaptively…

Reducing speckle in projected images

Granted: September 5, 2017
Patent Number: 9753298
A despeckle optical system for an image projector includes a diffuser, an in-plane vibrator, a microlens array, and a vibrator driver. The in-plane vibrator is coupled to vibrate the diffuser along a vibration plane. The vibrator driver is coupled to drive the in-plane vibrator and configured to drive the in-plane vibrator at different vibration amplitudes for averaging the intensity of speckle in display light that propagates through the diffuser via the microlens array.

Color filter array with reference pixel to reduce spectral crosstalk

Granted: September 5, 2017
Patent Number: 9756298
A color filter array includes a plurality of tiled minimal repeating units, each minimal repeating unit comprising an M×N set of individual filters. Each minimal repeating unit includes a plurality of imaging filters including individual filters having at least first, second, and third photoresponses, and at least one reference filter having a reference photoresponse, wherein the reference filter is positioned among the imaging filters and wherein the reference photoresponse transmits…

Image sensor packages with folded cover-glass sealing interface

Granted: August 29, 2017
Patent Number: 9748293
An image sensor package with a folded cover-glass sealing interface includes (a) an image sensor with a light-receiving surface, (b) a substrate having (i) a recessed surface to which the image sensor is bonded, (ii) a second surface facing in a direction parallel to optical axis of the image sensor, surrounding the recessed surface, and being further than the light-receiving surface from the recessed surface, and (iii) a third surface facing the optical axis, and adjoining and…

Method of fabricating multi-wafer image sensor

Granted: August 29, 2017
Patent Number: 9748308
A method of fabricating an image system includes forming a first wafer that includes a first semiconductor substrate and a first interconnect layer. A pixel array is formed in an imaging region of the first semiconductor substrate and a first insulation-filled trench is formed in a peripheral circuit region of the first semiconductor substrate. Additionally, a second wafer is formed that includes a second semiconductor substrate and a second interconnect layer. A second insulation-filled…

Liquid crystal display and infrared image sensor on silicon

Granted: August 29, 2017
Patent Number: 9749562
A novel head mounted display includes a display/image sensor. In a particular embodiment the display/image sensor is formed on a single silicon die, which includes display pixels and light sensor pixels. The display pixels and light sensor pixels are each arranged in rows and columns, and the arrays of light sensor pixels and display pixels are interlaced. The center of each light sensor pixel is located between adjacent rows and adjacent columns of display pixels.

High speed rolling image sensor with ADM architecture and method of implementing thereof

Granted: August 29, 2017
Patent Number: 9749569
High speed rolling image sensor includes pixel array disposed in first semiconductor die, readout circuits disposed in second semiconductor die and conductors. Pixel array is partitioned into pixel sub-arrays (PSAs). Each of the PSAs includes a plurality of pixels. Pixel groups include pixels that are non-contiguous, non-overlapping and distinct. Each pixel group includes pixels from different PSAs. Each pixel group is coupled to a corresponding analog-to-digital converter and memory…

Near-eye display systems, devices and methods

Granted: August 22, 2017
Patent Number: 9740030
A near-eye display device includes (a) a display unit having a liquid-crystal-on-silicon (LCOS) display and a first polarizing beam splitter interface for (i) reflecting illumination light from an illumination module towards the liquid-crystal-on-silicon display and (ii) transmitting display light from the LCOS display based on the illumination light, and (b) a viewing unit having an imaging objective that forms an image of the LCOS display for the pupil based on the display light, and a…

Method and system of implementing an uneven timing gap between each image capture in an image sensor

Granted: August 22, 2017
Patent Number: 9743025
Stacked chip imaging system comprising pixel array partitioned into pixel sub-arrays (PSAs) disposed in first semiconductor die and ADC circuitry including ADC circuits disposed in second semiconductor die. Each PSA is arranged into pixel groups. Each pixel group generates pixel data signals. Pixel array captures image data of first frame with first exposure time, second frame with second exposure time, third frame with third exposure time, and fourth frame with fourth exposure time.…

Photosensitive capacitor pixel for image sensor

Granted: August 15, 2017
Patent Number: 9735196
A method of fabricating a pixel array includes forming a transistor network along a frontside of a semiconductor substrate. A contact element is formed for every pixel in the pixel array that is electrically coupled to a transistor within the transistor network. An interconnect layer is formed upon the frontside to control the transistor network with a dielectric that covers the contact element. A cavity is formed in the interconnect layer. A conductive layer is formed along cavity walls…

Burst mode clock data recovery circuit for MIPI C-PHY receivers

Granted: August 15, 2017
Patent Number: 9735950
An example burst mode clock data recovery circuit may include a clock recovery circuit coupled to receive a plurality of data signals, and provide a recovered clock signal in response. Each of the plurality of data signals includes data and an embedded clock signal, and the plurality of data signals may be based on an encoded symbol. The clock recovery circuit is coupled to generate the recovered clock signal in response to a first one of the plurality of data signals. A data recovery…

Display system and method using set/reset pixels

Granted: August 8, 2017
Patent Number: 9728153
Displays and display driving methods implement a pixel set/reset scheme. Pixel cells of an example display each include a set terminal, a reset terminal, an output terminal, and a set/reset circuit. Responsive to receiving a set signal on the set terminal, the set/reset circuit asserts a first signal on the output terminal and maintains the first signal on the output terminal until a reset signal is received on the reset terminal. Responsive to receiving a reset signal on the reset…

Calibration circuitry and method for a time of flight imaging system

Granted: August 1, 2017
Patent Number: 9720076
A time of flight imaging system includes a light source coupled to emit light pulses to an object in response a light source modulation signal generated in response to a reference modulation signal. Each pixel cell of a time of flight pixel cell array is coupled to sense light pulses reflected from the object in response a pixel modulation signal. A programmable pixel delay line circuit is coupled to generate the pixel modulation signal with a variable pixel delay programmed in response…

Color filter including diamond-shaped pixels

Granted: July 25, 2017
Patent Number: 9716868
Embodiments are described of a color filter array including a plurality of tiled minimal repeating units. Each minimal repeating unit includes a primary set of four rhombic color filters positioned so that at least two vertices of each rhombic color filter contact a vertex of an adjoining rhombic color filter and so that the four rhombic filters form a central interstitial space and four peripheral interstitial spaces, wherein the primary set includes at least one color filter with a…

Image sensor pixel for high dynamic range image sensor

Granted: July 18, 2017
Patent Number: 9711546
An image sensor pixel includes a first photodiode and a second photodiode disposed in a semiconductor material. The first photodiode has a first doped region, a first lightly doped region, and a first highly doped region. The second photodiode has a second full well capacity substantially equal to a first full well capacity of the first photodiode, and includes a second doped region, a second lightly doped region, and a second highly doped region. The image sensor pixel also includes a…

Method and system for implementing dynamic ground sharing in an image sensor with pipeline architecture

Granted: July 18, 2017
Patent Number: 9712774
A method of implementing dynamic ground sharing in an image sensor with pipeline architecture starts with a pixel array capturing image data. Pixel array includes pixels to generate pixel data signals, respectively. A readout circuitry acquires the image data from a row in the pixel array. An analog-to-digital conversion (ADC) circuitry included in the readout circuitry samples the image data from the row to obtain sampled input data. When the ADC circuitry is sampling, a ground sharing…

Partial buried channel transfer device for image sensors

Granted: July 4, 2017
Patent Number: 9698185
Embodiments of an image sensor pixel that includes a photosensitive element, a floating diffusion region, and a transfer device. The photosensitive element is disposed in a substrate layer for accumulating an image charge in response to light. The floating diffusion region is dispose in the substrate layer to receive the image charge from the photosensitive element. The transfer device is disposed between the photosensitive element and the floating diffusion region to selectively…