Color filter array and image sensing device applying color filter array
A color filter array and image sensing technology, applied in the fields of optical filters, radiation control devices, optics, etc., can solve the problems of spectral interference, reduce the pure color of red spectrum, blue spectrum and green spectrum, reduce and other problems, and achieve Improve image quality, reduce optical interference and spectral interference
Active Publication Date: 2017-12-01
PIXART IMAGING INC
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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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[0041] Hereinafter, the present invention will be described in detail by explaining various exemplary embodiments of the present invention through the accompanying drawings. However, the inventive concept may be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. In addition, the same reference numbers in the drawings may be used to denote similar components.
[0042] In the color filter array and the image sensing device using the color filter array provided by the embodiments of the present invention, color filters are formed in the middle area and part of the surrounding area of each color unit, and the color filter is not formed around the color filter array. The area forms a light-transmitting object. The color filter is a high refractive index material, and the light-transmitting material is a low refractive index material. Accordingly, in each color unit, the color filter and the light-transmittin...
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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 more particularly to a color filter array for reducing spectral crosstalk and an image sensing device using the same. Background technique [0002] Image sensing devices are currently one of the main components in 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 (CMOS) image sensing devices. The image sensing device usually includes a micro-lens, a color filter array, and a photodiode. [0003] The color filter array is composed of multiple sub-pixel arrays. The sub-pixel array is a periodic pattern composed of filters of different colors such as red (R), blue (B), and green (G). When light is irradiated to the color filter array through the lens, there is less spectral crosstalk between the corresponding red...
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IPC IPC(8): G02B5/20H01L27/146
CPCG02B5/201H01L27/14621H01L27/14625H01L27/14627
Inventor 刘家佑
Owner PIXART IMAGING INC