Imaging device and signal processing circuit for the imaging device

A signal processing circuit and image capture technology, applied in solid image signal generators, image communication, signal generators with a single pick-up device, etc., can solve the problems of inability to obtain color images, insufficient sensitivity of imaging elements, and user visual recognition Low degree and other issues

Active Publication Date: 2011-08-24
PANASONIC SEMICON SOLUTIONS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In dark conditions such as at night, the amount of visible light is very small, so the sensitivity of the imaging element is insufficient, and good color images cann

Method used

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  • Imaging device and signal processing circuit for the imaging device
  • Imaging device and signal processing circuit for the imaging device
  • Imaging device and signal processing circuit for the imaging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0091] The image capture device according to Embodiment 1 of the present invention is configured to generate a luminance signal from visible light when it is bright, and to generate a luminance signal from near-infrared light when it is dark.

[0092] figure 1 It is a block diagram showing the configuration of the imaging device according to Embodiment 1 of the present invention. This image capture device includes an optical lens 1 , a solid-state imaging element 2 , an AD converter 3 , a signal processing unit 4 , a format conversion unit 5 , and a memory 6 . This image capture device is connected to an external device 7 including an external storage medium 7a and a monitor 7b.

[0093]The solid-state imaging element 2 includes a CCD image sensor and the like. In the solid-state imaging device 2 , a plurality of pixels have sensitivity in the wavelength region of visible light (wavelength: approximately 380 nm to 770 nm) and near-infrared light (wavelength: approximately 8...

Embodiment approach 2

[0115] In addition to the necessary conditions of Embodiment 1, the image capture device according to Embodiment 2 of the present invention further compares the visible light digital pixel signal with a specified threshold value when the visible light digital pixel signal is smaller than the near-infrared digital pixel signal. Th is compared, and the generation structure of the color signal is switched according to the comparison result.

[0116] As mentioned above, the visible light digital pixel signals (R, G, B) obtained in the second photography environment become smaller compared with the near-infrared light digital pixel signals (IR), but the visible light digital pixel signals obtained at this time ( Among R, G, B), there are signals whose signal level is greater than the specified threshold Th (hereinafter referred to as the first visible light digital pixel signal (R, G, B)), and signals equal to or smaller than the specified threshold Th (hereinafter It is called the...

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PUM

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Abstract

Switching is performed between generation of a luminance signal based on a visible light pixel signal and generation of a luminance signal based on a near infrared pixel signal in accordance with a comparison result between the visible light pixel signal level and the near infrared pixel signal level.

Description

technical field [0001] The present invention relates to an image pickup device including a plurality of pixels having sensitivity in the wavelength region of visible light and near-infrared light, an image pickup device that generates luminance signals and color signals from visible light pixel signals and near-infrared light pixel signals, and an image pickup device for such an image pickup device signal processing circuit. Background technique [0002] The entire contents of Japanese Patent Application No. 2008-260435 filed on October 7, 2008 including specification, drawings, and claims are hereby incorporated by reference into this specification. [0003] In a solid-state imaging element such as a CCD (Charge Coupled Device, a charge-coupled device) image sensor, a color filter for obtaining a color image (for example, a primary color filter that transmits light of three primary colors of red, green, and blue) ). Light of a specific wavelength band in visible light (wa...

Claims

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Application Information

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IPC IPC(8): H04N5/372H04N5/33H04N9/07H04N5/335
CPCH04N5/332H04N9/045H04N2209/046H04N23/11
Inventor 野口智行
Owner PANASONIC SEMICON SOLUTIONS CO LTD
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