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Dual Pixel-Sized Color Image Sensors And Methods For Manufacturing The Same

An image sensor and dual-pixel technology, applied in image communication, semiconductor devices, electric solid-state devices, etc., can solve the problem of different time periods for obtaining data

Active Publication Date: 2015-05-20
OMNIVISION TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both sensors can still suffer from artifacts associated with moving objects because the time periods used to acquire data from different parts of the dynamic range are different

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  • Dual Pixel-Sized Color Image Sensors And Methods For Manufacturing The Same
  • Dual Pixel-Sized Color Image Sensors And Methods For Manufacturing The Same
  • Dual Pixel-Sized Color Image Sensors And Methods For Manufacturing The Same

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Embodiment Construction

[0022] This paper discloses a dual pixel size color image sensor for capturing HDR images. The color pixel of a typical Bayer-type image sensor is composed of two green photosensitive units, one red photosensitive unit and one blue photosensitive unit that are sensitive to light from the green, red and blue parts of the visible spectrum, respectively. The photosensitive unit is formed by applying an array of color filters to an array of basic pixels. Each pixel of the basic pixel array together with a color filter of the color filter array defines a photosensitive unit. In the dual-pixel size color image sensor disclosed in the present invention, each color pixel is composed of two sets of photosensitive units, wherein each set includes photosensitive units of different colors. One set of photoreceptor units is more sensitive to light than another set. A more sensitive set of photosensitive cells provides high quality data for darker parts of the scene, while a less sensitiv...

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Abstract

A dual pixel-size color image sensor, including an imaging surface, for imaging of incident light, and a plurality of color pixels, each color pixel including (a) four large photosites, including two large first-color photosites sensitive to a first color of the incident light, and (b) four small photosites including two small first-color photosites sensitive to the first color of the incident light. The large and small first-color photosites are arranged such that connected regions of the imaging surface, not associated with large and / or small first-color photosites, are not continuous straight lines. A method for manufacturing a color filter array on an imaging surface of a dual pixel-size image sensor includes forming a first-color coating on first portions of the imaging surface to form large and small first-color photosites sensitive to a first color, wherein connected portions of the imaging surface, different from the first portions, are not continuous straight lines.

Description

Background technique [0001] Standard image sensors have a limited dynamic range of about 60 to 70 dB or less. For example, an 8-bit sensor has a dynamic range of only 48dB. However, the real-world luminance dynamic range is much larger, and natural scenes often span a range of 90dB or more. When an image sensor captures a scene with a luminance dynamic range that exceeds the sensor's dynamic range, information is necessarily lost. Depending on the exposure settings, brighter areas may be saturated and / or darker areas may be underexposed, resulting in a captured image of a quality that does not reproduce the actual scene. [0002] In order to simultaneously capture the highlights and shadows of a scene, image sensors have used high dynamic range (HDR) technology to increase the captured dynamic range. One of the most common techniques to increase dynamic range is to combine multiple exposures captured with standard low dynamic range image sensors into a single HDR image, whi...

Claims

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Application Information

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IPC IPC(8): H04N9/04H01L27/146
CPCH01L27/14607H01L27/14621H01L27/14685H04N25/585
Inventor 李缙陈刚钱胤戴幸志
Owner OMNIVISION TECH INC