CN110164898A - Colorful optical filter array and imaging sensor - Google Patents
Colorful optical filter array and imaging sensor Download PDFInfo
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- CN110164898A CN110164898A CN201910539073.0A CN201910539073A CN110164898A CN 110164898 A CN110164898 A CN 110164898A CN 201910539073 A CN201910539073 A CN 201910539073A CN 110164898 A CN110164898 A CN 110164898A
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- 239000012528 membrane Substances 0.000 claims description 3
- 239000003086 colorant Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000003491 array Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/1462—Coatings
- H01L27/14621—Colour filter arrangements
Abstract
The present invention provides a kind of colorful optical filter array and imaging sensor, colorful optical filter array includes: multiple pixel units in array distribution；Each pixel unit includes being located in the middle a white light field and four colored filters positioned at edge, and four colored filters are sequentially connected end to end and surround the white light field；Wherein, the area of the white light field is not less than the sum of the area of four colored filters.The pixel value of the various colors light of each pixel can be accurately obtained using scheme provided by the invention.
Description
Technical field
The present invention relates to image sensor technologies field more particularly to a kind of colorful optical filter arrays and imaging sensor.
Background technique
Optical filter includes: Red lightscreening plate, green color filter and blue color filter etc., the material of the optical filter of different colours
Difference, every kind of optical filter only allow a kind of light of color in light by filtering out the light of other colors.
Existing colorful optical filter array mostly uses greatly Baeyer array, is filtered by Red lightscreening plate, green color filter and blue
The optical filter of the types such as mating plate is formed by permutation and combination.4 × 4 colorful optical filter array as shown in Figure 1 has 8 greens
Optical filter, 4 blue color filters and 4 Red lightscreening plate compositions, wherein and the corresponding G of each green color filter (Green, it is green
Color) pixel, the corresponding B of each blue color filter (Blue, blue) pixel, the corresponding R of each Red lightscreening plate (Red, it is red
Color) pixel.After optical filter filters, each pixel can only obtain a kind of corresponding pixel value of color of light, same pixel its
The pixel value of its two kinds of color of light needs to obtain by the calculated for pixel values of the corresponding color of light of other pixels around the pixel.
For example, the pixel value of the pixel is R primary color values for a R pixel, the G primary color values of the pixel can pass through
The corresponding G primary color values of the 4 G pixels adjacent with the pixel are calculated, and the B primary color values of the same pixel pass through the pixel
The corresponding B primary color values of B pixel of surrounding are calculated.Since remaining two kinds of primary color values of any one pixel are required by other pictures
Element is calculated using certain algorithm, it is difficult to accurate remaining two kinds of primary color values for obtaining any one pixel, and if algorithm
Select it is improper, the primary color values being calculated be also possible to can with true value there are large errors.
Summary of the invention
The purpose of the present invention is to provide a kind of colorful optical filter array and imaging sensors, accurately to obtain each pixel
Various colors light pixel value.Specific technical solution is as follows:
In a first aspect, the present invention provides a kind of colorful optical filter arrays, comprising:
In multiple pixel units of array distribution；
Each pixel unit includes being located in the middle a white light field and four colored filters positioned at edge,
Four colored filters are sequentially connected end to end and surround the white light field；
Wherein, the area of the white light field is not less than the sum of the area of four colored filters.
Optionally, the colored filter includes the first colored filter, the second colored filter and third colorized optical filtering
Piece；
Four colored filters are in the two diagonal lines distribution to cross one another；
Wherein, first colorized optical filtering and second colored filter are along a diagonal cloth
It sets, two third colored filters are arranged along another diagonal.
Optionally, first colored filter is Red lightscreening plate, and second colored filter is blue color filter,
The third colored filter is green color filter.
Optionally, the shapes and sizes of four colored filters are identical.
Optionally, the shape of the colored filter is strip, and the white space is square region.
Optionally, the shape of the colored filter is right angled triangle, and the white space is square region.
Optionally, the shape of the colored filter is isosceles right triangle.
Optionally, the range of ratio shared by the area of white light field described in each pixel unit be 50%~
80%.
Optionally, the white light field is hollowed out area or is transparent membrane.
Second aspect, the present invention also provides a kind of imaging sensors, including colored filter as described in relation to the first aspect
Array.
Optionally, lenticule is provided in the white light field in the colorful optical filter array.
Compared with prior art, technical solution of the present invention has the advantages that
Colorful optical filter array includes multiple identical pixel units in array distribution, and the centre of each pixel unit is
White light field, the periphery of white light field four, colored filter is sequentially connected end to end, and the area of white light field is not less than
The sum of the area of four colored filters.Each pixel unit corresponds to pixel when imaging, as a result, in colored filter
Each pixel unit can directly receive white light by intermediate white light field, so that the total light intensity of each pixel is obtained,
Corresponding color light is received by the colored filter at edge, to obtain the difference of different colours light, and then always strong according to light
The pixel value of each color of light is calculated in difference between degree and different colours light.Due to each color of light of each pixel
Pixel value be all according to same pixel unit received optical oomputing obtain, do not need to calculate by its surrounding pixel, because
This calculated result is more nearly true value, can accurately obtain the pixel value of each color of light of each pixel.Meanwhile the present invention
Colorful optical filter array in colored filter area it is small, production cost is low.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of Baeyer array；
Fig. 2 is the structural schematic diagram for the colorful optical filter array that one embodiment of the invention provides；
Fig. 3 is the structural schematic diagram for another pixel unit that one embodiment of the invention provides；
Fig. 4 is the structural schematic diagram for another pixel unit that one embodiment of the invention provides；
In Fig. 2-4,101- white light field；The first colored filter of 102-；The second colored filter of 103-；104- third is color
Colo(u)r filter.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to a kind of colorful optical filter array proposed by the present invention and imaging sensor
It is described in further detail.According to claims and following explanation, advantages and features of the invention will be become apparent from.It should be noted
It is that attached drawing is all made of very simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating this hair
The purpose of bright embodiment.
To solve problem of the prior art, the embodiment of the invention provides a kind of colorful optical filter array and image sensings
Device.
Fig. 2 is a kind of structural schematic diagram for colorful optical filter array that one embodiment of the invention provides.Referring to FIG. 2, one
Kind colorful optical filter array includes multiple pixel units in array distribution, and each pixel unit is identical, each pixel
Unit corresponds to pixel when imaging, Fig. 2 merely exemplary 4 pixel units shown in 2 × 2 array arrangements.
Each pixel unit includes being located in the middle a white light field 101 and four colored filters positioned at edge
(four colored filters are specifically as follows 102, second colored filters 103 of first colored filter and two
Three colored filters 104), four colored filters are sequentially connected end to end and closely around the white light fields 101.
In the present embodiment, the area of white light field 101 is not less than the sum of the area of four colored filters.Due to described white
Light region 101 does not have filter action to light, and reception can be obtained a pixel unit through all light of white light field 101 and exist
The total light intensity of corresponding pixel after imaging.Therefore, if the area of white light field 101 is too small, it will lead to light obtained
There are larger differences between line overall strength and total light intensity true value, therefore are arranged in a pixel unit in the present embodiment,
The area of white light field 101 is not less than the 50% of entire pixel cell area.Preferably, in a pixel unit, white light area
The area in domain 101 is greater than the sum of the area of four colored filters, for example, white light field 101 is shared in entire pixel unit
The range of the ratio of area is 50%~80%.The white light field 101 does not have the filtering function to light color, therefore can be with
It is hollowed out area, is also possible to transparent membrane.
In the present embodiment, four colored filters are specially 102, second colorized optical filterings of first colored filter
Piece 103 and two third colored filters 104, this four colored filters are in the two diagonal lines distribution to cross one another, wherein
One the first colorized optical filtering 102 and second colored filter 103 arrange that two third colours are filtered along a diagonal
Mating plate 104 is arranged along another diagonal.Specifically, the first colored filter 102 can be Red lightscreening plate, second is color
Colo(u)r filter 103 can be blue color filter, and third colored filter 104 can be green color filter.
In other embodiments, the type and distribution situation of four colored filters can be set according to actual needs
It sets, for example, four colored filters include a Red lightscreening plate, a blue color filter, a green color filter and one
Yellow filter, the present embodiment do not limit this.
Preferably, the shapes and sizes of four colored filters are identical, the picture in colorful optical filter array as shown in Figure 2
Plain unit, the shape of four colored filters is strip, after the colored filter of four strips is sequentially connected end to end, in inside
A square region is limited, the region of this square is white light field 101.
Pixel unit as shown in Figure 3, the shape of four colored filters are right angled triangle, four colored filters
Bevel edge be sequentially connected end to end after, make a square region in interior lateral confinement, this square area is white light field
101, the bevel edge of four colored filters constitutes the four edges of white light field 101.Pixel unit as shown in Figure 4, four colours
The shape of optical filter may further be isosceles right triangle, and in this pixel unit, the area of white light field 101 is equal to
The sum of the area of four colored filters.
The shape on the boundary of white light field 101 determines by the shape of four colored filters, in other embodiments, four
Colored filter can also have other shapes, such as pentagon, correspondingly, the boundary of white light field 101 may be other
Shape, the present embodiment do not limit this.
The various colors value of each pixel can be accurately obtained to colorful optical filter array provided in this embodiment below
Principle is introduced.
Since in the prior art, a kind of value of color of light of a pixel can directly obtain, and other face of the pixel
The pixel value of coloured light needs to be calculated by its surrounding pixel, and this mode will lead to the pixel value of the color of light of calculating
Inaccuracy even error is larger.The core ideas of the present embodiment is that each color of light of the pixel is calculated by a pixel
Pixel value, due to not needing to calculate by other pixels, each color value being calculated is able to reflect each of the pixel
The true pixel values of a color of light.The pixel value of each color of light of one pixel can calculate in the following manner:
By taking colorful optical filter array shown in Fig. 2 as an example, if four colored filters in each pixel unit are respectively
Two green color filters, a Red lightscreening plate and a blue color filter, two green color filters are diagonal line setting, one
Red lightscreening plate and a blue color filter are diagonal line setting.It, can be by corresponding multiple for each pixel unit
Photodiode reads the total light intensity L of the pixel after pixel unit imagingtotalAnd it is strong between different colours light
Difference is spent, such as the strength difference L between green light and blue lightG-B, strength difference L between green light and red lightG-R, pass through
Three formula can calculate three primary color values R, G, B of this pixel below:
R+G+B=Ltotal；
G-B=LG-B；
G-R=LG-R。
In conclusion colorful optical filter array includes multiple identical pixel units in array distribution, each pixel list
The centre of member is white light field, and the periphery of white light field four, colored filter is sequentially connected end to end, and white light field
Area is not less than the sum of the area of four colored filters.Each pixel unit corresponds to pixel when imaging, colored as a result,
Each pixel unit in optical filter can directly receive white light by intermediate white light field, to obtain the light of each pixel
Line overall strength receives corresponding color light by the colored filter at edge, to obtain the difference of the different colours light of each pixel
It is worth, and then each face of each pixel is calculated according to the difference between the total light intensity of each pixel and different colours light
The pixel value of coloured light.Since the pixel value of each color of light of each pixel is according to the received photometry of same pixel unit institute
It obtains, does not need to calculate by its surrounding pixel, therefore calculated result is more nearly true value, can accurately obtain every
The pixel value of each color of light of a pixel.Meanwhile in the colorful optical filter array of the present embodiment colored filter area it is small,
Production cost is low.
One embodiment of the invention also provides a kind of imaging sensor, has colored filter battle array described in above-described embodiment
Column.The colorful optical filter array includes multiple pixel units in array distribution, and each pixel unit includes in being located at
Between a white light field and four colored filters positioned at edge, four colored filters are sequentially connected end to end and ring
Around the white light field, the area of the white light field is not less than the sum of the area of four colored filters.The colour
The specific structure of filter arrays refers to previous embodiment, then this is not repeated them here.
The effect of lenticule (micro lens) is preferably to assemble light, can be in colored filter battle array in the present embodiment
Lenticule is set in each white light field in column, the light of white light field is incident on better aggregation.
Light into imaging sensor passes through photodiode for optical signal again after colorful optical filter array filters
Be converted into electric signal, thus read through the overall strength of the light of white light field incidence and through different optical filters optical filtering after not
With the strength difference between color of light, and then the pixel value of each color of light in each pixel is calculated, due to each pixel
Each color of light pixel value be all according to same pixel unit received optical oomputing obtain, do not need by around it
Pixel calculates, therefore calculated result is more nearly true value, can accurately obtain the pixel of each color of light of each pixel
Value.
Herein, relational terms such as first and second and the like be used merely to by an entity or operation with it is another
One entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this reality
Relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (11)
1. a kind of colorful optical filter array characterized by comprising
In multiple pixel units of array distribution；
Each pixel unit includes being located in the middle a white light field and four colored filters positioned at edge, and four
The colored filter is sequentially connected end to end and surround the white light field；
Wherein, the area of the white light field is not less than the sum of the area of four colored filters.
2. colorful optical filter array as described in claim 1, which is characterized in that the colored filter includes the first colored filter
Mating plate, the second colored filter and third colored filter；
Four colored filters are in the two diagonal lines distribution to cross one another；
Wherein, first colorized optical filtering and second colored filter are arranged along a diagonal, two
A third colored filter is arranged along another diagonal.
3. colorful optical filter array as claimed in claim 2, which is characterized in that first colored filter is red filter
Piece, second colored filter are blue color filter, and the third colored filter is green color filter.
4. colorful optical filter array as described in claim 1, which is characterized in that the shape of four colored filters and big
It is small identical.
5. colorful optical filter array as claimed in claim 4, which is characterized in that the shape of the colored filter is strip,
The white space is square region.
6. colorful optical filter array as claimed in claim 4, which is characterized in that the shape of the colored filter is right angle three
Angular, the white space is square region.
7. colorful optical filter array as claimed in claim 6, which is characterized in that the shape of the colored filter is that isosceles are straight
Angle triangle.
8. colorful optical filter array as described in claim 1, which is characterized in that white light area described in each pixel unit
The range of ratio shared by the area in domain is 50%~80%.
9. colorful optical filter array as described in claim 1, which is characterized in that the white light field is hollowed out area or is
Transparent membrane.
10. a kind of imaging sensor, which is characterized in that including colored filter battle array as claimed in any one of claims 1-9 wherein
Column.
11. imaging sensor as claimed in claim 10, which is characterized in that the white light field in the colorful optical filter array
On be provided with lenticule.
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| CN201910539073.0A CN110164898A (en) | 2019-06-20 | 2019-06-20 | Colorful optical filter array and imaging sensor |
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| CN101740588A (en) * | 2008-11-06 | 2010-06-16 | 采钰科技股份有限公司 | Color filter arrays and image sensors using the same |
| KR20110036993A (en) * | 2009-10-05 | 2011-04-13 | 주식회사 동부하이텍 | Image sensor and manufacturing method of image sensor |
| CN104284106A (en) * | 2013-07-11 | 2015-01-14 | 索尼公司 | Solid-state image pickup apparatus and electronic apparatus |
| CN108305883A (en) * | 2018-01-30 | 2018-07-20 | 德淮半导体有限公司 | Imaging sensor |
-
2019
- 2019-06-20 CN CN201910539073.0A patent/CN110164898A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1501169A (en) * | 2002-10-09 | 2004-06-02 | ������������ʽ���� | Solid state image pickup element and method of manufacturing a solid state pickup element |
| CN101740588A (en) * | 2008-11-06 | 2010-06-16 | 采钰科技股份有限公司 | Color filter arrays and image sensors using the same |
| KR20110036993A (en) * | 2009-10-05 | 2011-04-13 | 주식회사 동부하이텍 | Image sensor and manufacturing method of image sensor |
| CN104284106A (en) * | 2013-07-11 | 2015-01-14 | 索尼公司 | Solid-state image pickup apparatus and electronic apparatus |
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