Image processing methods for image sensors with phase detection pixels

A phase detection and pixel technology, applied in the field of imaging system, can solve problems such as difficult correction, and achieve the effect of reducing deviation

Active Publication Date: 2016-02-03
SEMICON COMPONENTS IND LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, optical crosstalk between a green image pixel and a green phase detection pixel can be more difficult to correct than optical crosstalk between a green image pixel and a red image pixel

Method used

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  • Image processing methods for image sensors with phase detection pixels
  • Image processing methods for image sensors with phase detection pixels
  • Image processing methods for image sensors with phase detection pixels

Examples

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Embodiment Construction

[0029] Embodiments of the invention relate to image sensors with autofocus and depth sensing capabilities. An electronic device with a camera module is shown in figure 1 middle. Electronic device 10 may be a digital camera, computer, cellular phone, medical device, or other electronic device. Camera module 12 (sometimes referred to as an imaging device) may include one or more image sensors 14 and one or more lenses 28 . During operation, lens 28 (sometimes referred to as optics 28 ) focuses light on image sensor 14 . Image sensor 14 includes photosensitive elements (eg, pixels) that convert light into digital data. An image sensor can have any number of pixels (eg, hundreds, thousands, millions, or more). A typical image sensor may, for example, have millions of pixels (eg, megapixels). As examples, image sensor 14 may include bias circuitry (e.g., source follower load circuitry), sample and hold circuitry, correlated double sampling (CDS) circuitry, amplifier circuitry,...

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Abstract

The invention relates to an image processing method for image sensors with phase detection pixels. The image sensor may include a pixel array having image pixels for capturing image data and phase detection pixels for gathering phase information during automatic focusing operations. Phase detection pixels may form phase detection pixel pairs having first and second pixels with different angular responses. The first and second pixels may have color filters of the same color or may have color filters of different colors. The phase detection pixel pairs may be isolated from other phase detection pixel pairs in the array or may be arranged consecutively in a line. The phase detection pixels may, for example, be provided with color filters to match the color filter pattern of the pixel array. Processing circuitry may adjust red and green pixel signals from a phase detection pixel pair having a red and green color filter and may subsequently determine a phase difference using the adjusted pixel signals.

Description

technical field [0001] The present application relates generally to imaging systems, and more particularly, to imaging systems with phase detection capabilities. Background technique [0002] Modern electronic devices such as cellular telephones, cameras, and computers often use digital image sensors. Imager sensors (sometimes referred to as imagers) may be formed from a two-dimensional array of image sensing pixels. Each pixel receives incident photons (light) and converts the photons into electrical signals. Image sensors are sometimes designed to provide images to electronic devices using the Joint Photographic Experts Group (JPEG) format. [0003] Some applications, such as autofocus and three-dimensional (3D) imaging, may require electronic devices to provide stereo and / or depth sensing capabilities. For example, in order to bring an object of interest into focus for image capture, the electronic device may need to identify the distance between the electronic device ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/217H04N5/369
CPCH04N23/672H04N25/704H04N25/134
Inventor M·米利纳尔
Owner SEMICON COMPONENTS IND LLC
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