Color filter array and image sensing device using the same

A color filter array, image sensing technology, applied in filters, radiation control devices, optics, etc., can solve the problem of reducing the pure color, spectral interference, and image saturation deterioration of the red spectrum, blue spectrum and green spectrum. Signal-to-noise ratio and other issues to reduce optical interference and spectral interference and improve image quality

Active Publication Date: 2019-12-10
PIXART IMAGING INC
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Problems solved by technology

However, this kind of color filter array will seriously cause spectral cross-talk due to the fully light-transmitting characteristics of the low-refractive index material, which will reduce the pure color of the red spectrum, blue spectrum and green spectrum, and make the image saturation change. Poor and signal to noise ratio (Signal to noise ratio, SNR) reduction

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  • Color filter array and image sensing device using the same
  • Color filter array and image sensing device using the same
  • Color filter array and image sensing device using the same

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Embodiment Construction

[0041] Hereinafter, the present invention will be described in detail by illustrating various exemplary embodiments of the invention with reference to the accompanying drawings. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Additionally, the same reference numerals may be used in the drawings to denote similar components.

[0042] The color filter array provided by the embodiment of the present invention and the image sensing device using it form a color filter in the middle area and part of the surrounding area of ​​each color unit, and form a color filter around the area where no color filter is formed. The region forms a translucent object. The color filter is a material with a high refractive index, and the transparent object is a material with a low refractive index. Accordingly, in each color unit, the color filters and light-transmitting objects formed in the...

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Abstract

The invention discloses a color filter array and an image sensing device applying the color filter array. The color filter array comprises multiple color units which are arranged into a matrix. Each color unit is provided with a middle area and a surrounding area, and the surrounding area encloses the middle area. A color filter object is formed in the middle area. Multiple light transmitting objects are formed in a part of the surrounding area, and the light transmitting objects extend to a part of the edge of the color unit from the edge of the middle area. The color filter object is formed in the rest of the surrounding area. The color filter object is made of high-refractive-index material, and the light transmitting objects are made of low-refractive-index material. Therefore, the spectral interference can be reduced by the composition of the color filter object of the middle area and the color filter object of the surrounding area and the optical interference can be reduced by the light transmitting objects of the surrounding area in each color unit so as to enhance the image quality sensed by the photodiode.

Description

technical field [0001] The present invention relates to a color filter array and an image sensing device using the same, and in particular to a color filter array for reducing spectral crosstalk and an image sensing device using the same. Background technique [0002] Image sensing devices are one of the main components in current optoelectronic devices such as digital cameras and mobile phones. Existing image sensing devices include charge coupled device (CCD) image sensing devices and complementary metal oxide semiconductor (complementary metal oxide oxide, CMOS) image sensing devices. The image sensing device generally includes a micro-lens, a color filter array, and a photodiode. [0003] The color filter array is formed by arrays of multiple sub-pixels. The sub-pixel array is a periodic pattern formed by different color filters such as red (R), blue (B) and green (G). When the light irradiates the color filter array through the lens, there is less spectral crosstalk ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/20H01L27/146
CPCG02B5/201H01L27/14621H01L27/14625H01L27/14627
Inventor 刘家佑
Owner PIXART IMAGING INC
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