CN207558799U - Colorful optical filter array structure and imaging sensor - Google Patents

Abstract

The utility model is related to a kind of colorful optical filter array structure and a kind of imaging sensor, the colorful optical filter array structure includes：The minimum repetitive unit of multiple array arrangements；Optical filter at least one colour and at least one transparent region in each repetitive unit；The optical filter of different colours and the transparent region are alternatively arranged.Above-mentioned colorful optical filter array structure can effectively improve the image quality of imaging sensor.

Description

Colorful optical filter array structure and imaging sensor

Technical field

The utility model is related to image sensing area more particularly to a kind of colorful optical filter array structure and image sensings Device.

Background technology

In the image sensor, in the image sensor, it after incident light is captured by camera lens, is filtered by optical filter, Monochromatic light is formed, incident photon reaches photodiode region and is absorbed.

Compared with color sensor camera lens, black and white sensor lens can get more details from scene.It is because single Colour sensor be to intake light number be identified, can't consider light color.RGB color lens sensors are to need It filters light and determines which position is color should appear in, but this process can lose some details again later.

If black and white sensor and color sensor can be integrated on same sensor, it both can guarantee that color sensor regards Feel the advantage in terms of color, and can guarantee the advantages of black and white sensor obtains more details from scene, to outflow image Quality will have very important significance.

A kind of new colorful optical filter array structure is needed, to improve the picture quality of imaging sensor formation.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of colorful optical filter array structure and a kind of image passes Sensor, to improve image quality.

To solve the above-mentioned problems, the utility model provides a kind of colorful optical filter array structure, including：Multiple arrays The minimum repetitive unit of arrangement；Optical filter at least one monochrome and at least one clear area in each repetitive unit Domain；The optical filter of different colours and the transparent region are alternatively arranged.

Optionally, the transparent region is surrounded by the optical filter.

Optionally, a transparent region is shared between adjacent minimum repetitive unit.

Optionally, each minimum repetitive unit includes two green color filters, a Red lightscreening plate and a blue Optical filter forms 2 × 2 array arrangements.

Optionally, the shape of the optical filter is hexagon, and the transparent region is quadrangle.

Optionally, the area of the transparent region is less than the area of optical filter.

Optionally, the transparent region is void region or is transparent membrane.

To solve the above problems, specific embodiment of the present utility model further includes a kind of imaging sensor, including as above The colorful optical filter array structure.

The minimum repetitive unit of the colorful optical filter array structure of the utility model includes colored filter and clear area Domain passes through color green light corresponding to the light portion of each pixel, is partly directed through the colored filter knot without optical filtering Structure.The light intensity through the colorful optical filter array structure can be improved so that axis information is more abundant.

The imaging sensor of the utility model combines the imaging of color image sensor and black and white sensor a little, into one Step improves image quality.

Description of the drawings

Fig. 1 is the structure diagram of the colorful optical filter array structure of one specific embodiment of the utility model.

Specific embodiment

Below in conjunction with the accompanying drawings to the specific reality of colorful optical filter array structure provided by the utility model and imaging sensor The mode of applying elaborates.

It please refers to Fig.1, is the structure diagram of the colorful optical filter array structure of one specific embodiment of the utility model.

The colorful optical filter array structure includes：The minimum repetitive unit of multiple array arrangements, in each repetitive unit With at least one monochromatic filter and at least one transparent region, between the optical filter of different colours and the transparent region Every arrangement.Each minimum repetitive unit corresponds to an imaging pixel cell.

In this specific embodiment, the colorful optical filter array includes minimum repetitive unit 100；Each minimum repetition Unit 100 includes two green color filters, 101, Red lightscreening plates 102 and a blue color filter 103, forms 2 × 2 Array arrangement.

The shape of the green color filter 101, Red lightscreening plate 102 and blue color filter 103 be hexagon, four coloured silks Colo(u)r filter arranged adjacent, positioned at 103 central area of the green color filter 101, Red lightscreening plate 102 and blue color filter With a transparent region 104, surrounded by the green color filter 101, Red lightscreening plate 102 and blue color filter 103, it is described Transparent region 104 is quadrangle, and in the specific embodiment, the transparent region 104 is square.

The shape and size of colored filter are identical, in this specific embodiment, the green color filter 101, red Optical filter 102 and blue color filter 103 are hexagon, have gap between adjacent optical filter, form transparent region 104, Therefore, an also shared transparent region 104 between adjacent minimum repetitive unit 100.

The transparent region 104 does not have filter action to light, can increase through the colorful optical filter array structure Light intensity, so as to obtaining more details from scene, improve final image quality.

But if the area of transparent region 104 is excessive, can cause through the colorful optical filter array structure feux rouges, green The light intensity of light and blue light is too small, and the color effect for leading to finally formed image is poor.Therefore, the specific reality of the utility model It applies in mode, the area of single transparent region 104 is less than the area of single colored filter.Other in the utility model are specific In embodiment, the gross area of all transparent regions 104 is less than the optical filtering of any color in the colorful optical filter array structure The gross area of piece.

The transparent region 104 can be void region or transparent membrane, not have the filtering work(to light color Energy.

In this specific embodiment, the transparent region 104 is transparent membrane, improves the colorful optical filter array knot The intensity of structure, and it is possible to prevent in the image sensor be located at the colorful optical filter array structure upper and lower surface other It is in contact between material layer, it is ensured that the reliability of imaging sensor.

In other specific embodiments of the utility model, the optical filter can also have other shapes, such as have There are four the pentagon at right angle, have in minimum repetitive unit there are four optical filter, the bevel edge of four optical filters surrounds a clear area Domain.

In other specific embodiments of the utility model, the optical filter can also be other figures, such as triangle Any suitable shape such as shape, quadrangle, pentagon.

In another specific embodiment, the colour green light chip arrays can also include a green color filter, one Colo(u)r filter, a blue color filter altogether form 2 × 2 array arrangements with a transparent region.In other specific embodiments, Can be according to the demand to imaged color, the optical filter in the minimum repetitive unit can also have other array structures and face Colour cell is closed.

The optical filter of the minimum repetitive unit of the colorful optical filter array structure including at least one monochrome and transparent Region passes through color green light corresponding to the light portion of each pixel, is partly directed through the colored filter without optical filtering Structure.The light intensity through the colorful optical filter array structure can be improved so that axis information is more abundant.

Other specific embodiments of the utility model also provide an imaging sensor, have in above-mentioned specific embodiment The colorful optical filter array structure.

The colorful optical filter array structure includes the minimum repetitive unit of multiple array arrangements as shown in Figure 1, often There is at least one colored filter and at least one transparent region, the optical filter of different colours and institute in a repetitive unit Transparent region is stated to be alternatively arranged.The concrete structure of the colorful optical filter array structure refers to previous embodiment, no longer It repeats.

Into imaging sensor light by colorful optical filter array structure optical filtering after again by photosensitive element carry out into Picture.Due to not only including colored filter also with transparent in each minimum repetitive unit of the colorful optical filter array structure Region.Some light is without color filtration so that the light intensity increase obtained on photosensitive element, so as to improve imaging Details, the imaging for combining color image sensor and black and white sensor a little, further improve image quality.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art Art personnel under the premise of the utility model principle is not departed from, can also make several improvements and modifications, these improvements and modifications Also it should be regarded as the scope of protection of the utility model.

Claims (8)

1. a kind of colorful optical filter array structure, which is characterized in that including：

The minimum repetitive unit of multiple array arrangements；

Optical filter at least one monochrome and at least one transparent region in each repetitive unit；

The optical filter of different colours and the transparent region are alternatively arranged.

2. colorful optical filter array structure according to claim 1, which is characterized in that the transparent region is by the optical filtering Piece surrounds.

3. colorful optical filter array structure according to claim 2, which is characterized in that between adjacent minimum repetitive unit altogether Enjoy a transparent region.

4. colorful optical filter array structure according to claim 3, which is characterized in that each minimum repetitive unit includes two A green color filter, a Red lightscreening plate and a blue color filter form 2 × 2 array arrangements.

5. colorful optical filter array structure according to claim 4, which is characterized in that the shape of the optical filter is six sides Shape, the transparent region are quadrangle.

6. colorful optical filter array structure according to claim 1, which is characterized in that the area of the transparent region is less than The area of optical filter.

7. colorful optical filter array structure according to claim 1, which is characterized in that the transparent region is void region Or it is transparent membrane.

8. a kind of imaging sensor, which is characterized in that including：Colored filter battle array as described in any one of claim 1 to 7 Array structure.