CN109426766A

CN109426766A - Fingerprint imaging mould group and electronic equipment

Info

Publication number: CN109426766A
Application number: CN201710732191.4A
Authority: CN
Inventors: 郑娅洁; 朱虹; 凌严; 吴磊
Original assignee: Shanghai Luoji Technology Co Ltd
Current assignee: Shanghai Oxi Technology Co Ltd; Shanghai Luoji Technology Co Ltd
Priority date: 2017-08-23
Filing date: 2017-08-23
Publication date: 2019-03-05

Abstract

A kind of fingerprint imaging mould group and electronic equipment, the fingerprint imaging mould group include shading light modulation layer, and the shading light modulation layer includes dimming section, and and adjacent dimming section between spacing increase with the increase of distance between the light source；Or the shading light modulation layer includes the light modulation group being made of multiple dimming sections, and spacing increases with the increase of distance between the light modulation group and the light source between adjacent dimming section in light modulation group.The setting of the shading light modulation layer can effectively reduce the difference of sensitive volume at pixel array different location, be conducive to the raising of the sensitive volume uniformity within the scope of entire pixel array, be conducive to the improvement of fingerprint image quality.

Description

Fingerprint imaging mould group and electronic equipment

Technical field

The present invention relates to fingerprint imaging field, in particular to a kind of fingerprint imaging mould group and electronic equipment.

Background technique

Fingerprint recognition is that will have fingerprint letter in fingerprint image and fingerprint recognition system after acquiring somatic fingerprint image Breath is compared, to realize identification.Due to the uniqueness of the convenience and somatic fingerprint that use, fingerprint identification technology It has been widely used in every field, such as: the field of safety check such as public security bureau, customs, the access control system and PC of building With the consumer product areas such as mobile phone etc..

In fingerprint imaging technique used by fingerprint recognition, one is optically acquire somatic fingerprint image: logical It crosses light source and generates incident light；Incident light is projected to finger surface layer, handles digital reflex and forms the reflected light for having finger print information；By scheming As sensor receives the reflected light, acquisition fingerprint image.

But fingerprint imaging mould group fingerprint image obtained in the prior art is easy to appear that sensitive volume is uneven, fingerprint The bad problem of picture quality.

Summary of the invention

Problems solved by the invention is to provide a kind of fingerprint imaging mould group and electronic equipment, to improve the fingerprint imaging mould The uniformity of group sensitive volume, improves the quality of obtained fingerprint image.

To solve the above problems, the present invention provides a kind of fingerprint imaging mould group, comprising:

Light source；Imaging sensor, the shading light modulation layer including pixel array and on the pixel array, the shading Light modulation layer includes multiple dimming sections, and the spacing between the adjacent dimming section increases with the increase of distance between the light source Greatly.

Optionally, the spacing between the adjacent dimming section linearly increases with the increase of distance between the light source Greatly.

Optionally, the spacing between adjacent dimming section is greater than or equal to design rule.

Optionally, the dimming section is the threadiness being arranged around the light source.

Optionally, the line width of the multiple dimming section is equal.

Optionally, the line width of the dimming section is design rule minimum value.

Optionally, the shape of the dimming section is zhou duicheng tuxing, and the light source is located on the symmetry axis of the dimming section.

Optionally, the shape of the dimming section is U-shaped or arc-shaped threadiness.

Optionally, the material of the dimming section is metal.

Optionally, the pixel array includes the pixel unit being arranged in array, and the pixel unit includes: derailing switch Part；The shading light modulation layer further includes light shielding part, corresponds with the switching device and to be set to the switching device corresponding At position.

Optionally, the switching device is amorphous switching device.

Optionally, the light source is point light source.

Correspondingly, the present invention also provides a kind of electronic equipment, comprising: fingerprint imaging mould group of the invention.

The present invention also provides a kind of fingerprint imaging mould groups, comprising:

Light source；Imaging sensor, the shading light modulation layer including pixel array and on the pixel array, the pixel Array includes the pixel unit being arranged in array, and the shading light modulation layer includes the light modulation group on the pixel unit, institute Stating light modulation group includes multiple dimming sections, the spacing between adjacent dimming section with distance between the light modulation group and light source increase And increase.

Optionally, the spacing in the light modulation group between the adjacent dimming section with the light modulation group and the light source it Between distance increase and linearly increase.

Optionally, the spacing in the light modulation group between adjacent dimming section is greater than or equal to design rule.

Optionally, the line width of the dimming section is equal.

Optionally, the line width of the dimming section is design rule minimum value.

Optionally, the dimming section is metal block, and the light modulation group is the metal block matrix of array arrangement.

Optionally, the dimming section is metal segments, and the light modulation group is multiple metal segments arranged in parallel.

Optionally, in the light modulation group dimming section quantity with distance between the light modulation group and the light source increase And it reduces.

Optionally, the quantity of the light modulation group is equal with the pixel unit quantity, and a pair of with the pixel unit one It should be arranged.

Optionally, the equal light modulation group of spacing is divided on the pixel array around the light source between adjacent dimming section Cloth.

Optionally, the equal light modulation group of spacing is axisymmetricly distributed on the pixel array between adjacent dimming section, institute Light source is stated to be located on symmetry axis.

Optionally, the equal light modulation group of spacing is in U-shape distribution or circle on the pixel array between adjacent dimming section Arc distribution.

Optionally, the pixel unit includes photodiode, and the photodiode has daylighting region；The shading Light modulation layer is corresponding with the daylighting regional location of the pixel unit, and the shading light modulation layer the pixel unit surface just Drop shadow spread is greater than or equal to the daylighting region.

Optionally, the pixel unit further include: switching device；The shading light modulation layer further includes light shielding part, and described Switching device corresponds and is set to the switching device corresponding position.

Optionally, the switching device is amorphous switching device.

Optionally, the light source is point light source.

Compared with prior art, technical solution of the present invention has the advantage that

The shading light modulation layer including dimming section is provided on the pixel array, and between adjacent dimming section spacing with The increase of distance between the light source and increase；Or the shading light modulation layer includes the light modulation being made of multiple dimming sections Group, and spacing increases with the increase of distance between the light modulation group and the light source between adjacent dimming section in light modulation group Greatly, spacing area is smaller therefore between the dimming section of the light source, i.e., is transmissive to light in the described shading light modulation layer Area is smaller, and lesser glazed area can reduce light transmission, so as to reduce the photosensitive of pixel array corresponding position Amount；Spacing area is larger between dimming section far from the light source, i.e., the area of light is transmissive in the described shading light modulation layer Larger, biggish glazed area can guarantee that light transmits, so as to maintain the sensitive volume of pixel array corresponding position；Institute The difference that sensitive volume at pixel array different location can be effectively reduced with the setting of the shading light modulation layer, is conducive to entire picture The raising of the sensitive volume uniformity within the scope of pixel array, is conducive to the improvement of fingerprint image quality.

In optinal plan of the present invention, the spacing between adjacent dimming section is greater than or equal to design rule, the multiple light modulation The line width in portion is equal, and is equal to the minimum value of design rule；Therefore the variation range of spacing is larger between the dimming section, can The range that the shading light modulation layer adjusts the acquired optical signal uniformity of the pixel array is effectively improved, can effectively be expanded The design space of the shading light modulation layer, advantageously reduces design difficulty, is conducive to improve dimming effect, is conducive to improve pixel The uniformity of sensitive volume in array range.

In optinal plan of the present invention, the dimming section can be located on the pixel array, and surround the light source interval Setting, also may be constructed the light modulation group on the pixel unit, is adjusted in the pixel array in a manner of one-to-one The uniformity of the acquired optical signal of different location pixel unit；Technical solution of the present invention way of realization multiplicity, can effectively improve The scope of application of the technical solution advantageously reduces technology difficulty, improves yield and device performance, is conducive to improve the finger The image quality of line imaging modules.

In optinal plan of the present invention, the shading light modulation layer further include: light shielding part, positioned at the derailing switch of the pixel unit On part, opened described in raising for reducing the probability of the device by illumination that open the light to extend the service life of the switching device Close the performance of device；That is, the shading light modulation layer can be realized by the shading metal of the switching device, thus simple The structure for changing the fingerprint imaging mould group, is conducive to the raising of device performance and manufacturing yield, help to obtain higher at image quality The fingerprint imaging mould group of amount.

Detailed description of the invention

Fig. 1 is a kind of circuit diagram of imaging sensor；

Fig. 2 is the overlooking structure diagram of single pixel in imaging sensor shown in Fig. 1；

Fig. 3 is a kind of the schematic diagram of the section structure of fingerprint imaging mould group；

Fig. 4 is a kind of the schematic diagram of the section structure of side light source mode fingerprint imaging mould group；

Fig. 5 is the schematic diagram of the section structure of another side light source mode fingerprint imaging mould group；

Fig. 6 is a kind of the schematic diagram of the section structure of one embodiment of fingerprint imaging mould group provided by the present invention；

Fig. 7 be in the group embodiment of fingerprint imaging mould shown in Fig. 6 imaging sensor 120 and light source 110 along the vertical view knot in the direction A Structure schematic diagram；

Fig. 8 is the schematic diagram of the section structure of another one embodiment of fingerprint imaging mould group provided by the present invention；

Fig. 9 is light source 210 described in the group embodiment of fingerprint imaging mould shown in Fig. 8 and described image sensor 220 along the direction C Overlooking structure diagram；

Figure 10 is the enlarged structure schematic diagram of light modulation group 224a in the group embodiment of fingerprint imaging mould shown in Fig. 9；

Figure 11 is the enlarged structure schematic diagram of light modulation group 224b in the group embodiment of fingerprint imaging mould shown in Fig. 9；

Figure 12 is the enlarged structure schematic diagram of light modulation group 224c in the group embodiment of fingerprint imaging mould shown in Fig. 9；

Figure 13 is the enlarged structure schematic diagram of light modulation group 224m in the group embodiment of fingerprint imaging mould shown in Fig. 9；

Figure 14 is the enlarged structure schematic diagram with light modulation group 324a corresponding to Figure 10；

Figure 15 is the enlarged structure schematic diagram with light modulation group 324b corresponding to Figure 11；

Figure 16 is the enlarged structure schematic diagram with light modulation group 324c corresponding to Figure 12；

Figure 17 is the enlarged structure schematic diagram with light modulation group 324m corresponding to Figure 13.

Specific embodiment

It can be seen from background technology that there are the non-uniform problems of sensitive volume for fingerprint imaging mould group in the prior art.Now in conjunction with The reason of its sensitive volume problem of non-uniform of the structural analysis of existing fingerprint imaging mould group and imaging sensor:

With reference to Fig. 1 and Fig. 2, wherein Fig. 1 shows a kind of circuit diagram of imaging sensor, and Fig. 2 shows Fig. 1 institute diagrams As the overlooking structure diagram of single pixel in sensor.

Described image sensor is face array image sensor.As shown in Figure 1, described image sensor includes multiple pixels Unit 11, the multiple pixel unit 11 are arranged in array to form pixel array；The pixel unit 11 of same column is by along column direction The data line 12 of extension is connected with reading circuit 13, and the pixel unit 11 of colleague passes through the scan line 14 and grid that extend along line direction Driving circuit 15 is connected.

Wherein, the pixel unit 11 include transmission region 11a and non-transparent region 11b, the pixel unit 11 it is non- The switch for being formed with photodiode 11pd (Photodiode) in transmission region 11b and being connected with the photodiode 11pd 11s(Thin Film Transistor).The photodiode 11pd is used to optical signal being converted to electric signal, the switch 11s is for controlling the on and off of the pixel unit 11.

As depicted in figs. 1 and 2, it is however generally that, the photodiode in described image sensor in the pixel unit 11 11pd is all the same, therefore the daylighting area of photodiode 11pd is identical in all pixels unit 11 in the pixel array.

With reference to Fig. 3, a kind of the schematic diagram of the section structure of fingerprint imaging mould group is shown.

The fingerprint imaging mould group includes: back light system 21, including backlight and light guide plate；Imaging sensor 22 is located at institute It states on back light system 21；Protective layer 23 is located in described image sensor 22, the protective layer 23 and described image sensor 22 Opposite surface is as sensing face 24, for receiving touch；The protective layer 23 and the back light system 21 and described image pass Fitting is realized by optical solid glue between sensor 22.

When carrying out fingerprint sensing, incident light 25 caused by the back light system 21 is projected to the sensing face 24 On；Reflection or refraction occur in the sensing face 24, forms the reflected light 26 for carrying finger print information；The reflected light 26 It turns back and is acquired by described image sensor 22, to obtain fingerprint image.

As shown in figure 3, the incident light 25 needs successively to transmit described image before being projected in the sensing face 24 The film layers such as sensor 22, the protective layer 23 and the optical solid glue；The incident light 25 will receive reflection, scattering and The effects of absorption, therefore the light intensity of the incident light 25 can decay；The decaying of 25 light intensity of incident light will affect institute's shape At the intensity of reflected light 26, to influence the intensity of the acquired optical signal of described image sensor 22, obtained fingerprint image is caused As quality degradation.

Especially when the fingerprint imaging mould group is set under cover-plate glass or display screen, the incident light also needs Transmissive display or cover-plate glass, therefore when the incident light is projected to the sensing face, light intensity is greatly cut down, so The fingerprint imaging mould group can not almost obtain fingerprint image.

In order to overcome the problems, such as that incident light is attenuated, the prior art introduces the mode of side light source.

With reference to Fig. 4, a kind of the schematic diagram of the section structure of side light source mode fingerprint imaging mould group is shown.

The fingerprint imaging mould group includes: cover-plate glass 31, has the first face being disposed opposite to each other and the second face 31b, described First face is as the sensing face 31a；The light source 32 and described image sensor 33, positioned at the second of the cover-plate glass 31 On the 31b of face, the light source 32 is located at the side of described image sensor 33；The light source 32 is mounted directly on the cover-plate glass On 31 the second face 31b, display screen 34, the display are additionally provided between described image sensor 33 and the cover-plate glass 31 The the second face 31b and described image sensor 33 for shielding 34 two opposite surfaces and the cover-plate glass 31 are solid by optics respectively Body glue realizes fitting.

Incident light 35 caused by the light source 32 does not need to be broken up by light guide plate and directly transmit the cover-plate glass 31, It is projected on the sensing face 31a, therefore the incident light 35 is not necessarily to transmit described image sensor 33 and the display screen 34, So will not be influenced by described image sensor 33 and the display screen 34.

With reference to Fig. 5, the schematic diagram of the section structure of another side light source mode fingerprint imaging mould group is shown.

In the fingerprint imaging mould group, the light source 42 is set to described image sensor 43 by flexible circuit board 46 Lower section, therefore the sensing face 41a and the light source 42 are located at the two sides of described image sensor 43.

Light source 33 (as shown in Figure 4) either positioned at described image sensor 33 (as shown in Figure 4) side is still located at Light source 42 (as shown in Figure 5) below described image sensor 43 (as shown in Figure 5), the light-emitting surface of light source are all located at described image The side of sensor or one end of bottom；Therefore the incident light is projected in the sensing face with certain angle of divergence, so Even if in the sensing face, there is no objects under test to be detected, and is projected to different location light intensity of incident light in the sensing face Be distributed in sensing face that distance is related between position and light source: the remoter position of distance between light source, the light intensity of incident light are got over It is weak；Correspondingly, the strong and weak also distance between light source of the reflected light as produced by incident light, and the reflected light is also with certain The angle of divergence is projected on the pixel array of described image sensor, therefore is projected in pixel array on different location pixel unit The light intensity of reflected light is related to the distance between light source: the remoter pixel unit of distance between light source, received reflected light Light intensity it is weak.

On the other hand, as depicted in figs. 1 and 2, photodiode 11pd in all pixels unit 11 in the pixel array Daylighting area be equal, therefore in different pixels unit 11 the acquired optical signal of photodiode power with irradiation pixel list The reflected light light intensity of member 11 is related, so in the fingerprint imaging mould group of side light source mode, the pixel of described image sensor The strong and weak distance between the pixel unit and light source of the collected optical signal of unit is related: distance is remoter between light source The acquired light signal strength of pixel unit is smaller, that is to say, that even if there is no objects under test to be detected in the sensing face, The sensitive volume of different pixels unit be also it is unequal, i.e., when being detected in the sensing face there is no object under test, institute It is non-uniform for stating the sensitive volume of different location pixel unit in image sensor pixel array.

Different location pixel unit sensitive volume it is uneven, will affect the acquisition of fingerprint image, cause obtained fingerprint image The problem of image quality amount declines.

To solve the technical problem, the present invention provides a kind of fingerprint imaging mould group, by the way that shading light modulation layer is arranged, makes to hide Spacing increases with the increase of distance between light source between adjacent dimming section in light light modulation layer, leans on to reduce pixel array The intensity irradiated at dipped beam source position by light, and then improve the uniformity of sensitive volume at pixel array different location；It is photosensitive The raising for measuring the uniformity, is conducive to the raising of fingerprint image quality.

To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention Specific embodiment be described in detail.

With reference to Fig. 6 and Fig. 7, a kind of structural schematic diagram of one embodiment of fingerprint imaging mould group provided by the present invention is shown； Wherein, Fig. 6 is the schematic diagram of the section structure of the fingerprint imaging mould group embodiment.

The fingerprint imaging mould group includes: light source 110；Imaging sensor 120, positioned at the side of the light source 110, including Pixel array 121 and the shading light modulation layer 122 on the pixel array 121, the shading light modulation layer 122 include multiple tune Light portion 123, the spacing between the adjacent dimming section 123 increase with the increase of distance between the light source 110.

The shading light modulation layer 122 including dimming section 123, and adjacent dimming section 123 are provided on the pixel array 121 Between spacing increase with the increase of distance between the light source 110.Therefore close to the dimming section 123 of the light source 110 Between spacing area it is smaller, i.e., the area that light is transmissive in the described shading light modulation layer 122 is smaller, lesser glazed area energy Light transmission is reduced, enough so as to reduce the sensitive volume of 121 corresponding position of pixel array；Far from the light source 110 Dimming section 123 between spacing area it is larger, i.e., the area that light is transmissive in the described shading light modulation layer 122 is larger, larger Glazed area can guarantee light transmit, so as to maintain the sensitive volume of 121 corresponding position of pixel array；So The setting of the shading light modulation layer 122 can effectively reduce the difference of sensitive volume at 121 different location of pixel array, be conducive to whole The raising of the sensitive volume uniformity in a 121 range of pixel array is conducive to improve fingerprint image quality.

The light source 110 is for generating light, to pass through the reflection of light and refraction acquisition finger print information, acquisition fingerprint image Picture.

In the present embodiment, the light source 110 is point light source.Specifically, the light source 110 is light emitting diode, to reduce The volume of the fingerprint imaging mould group reduces the energy consumption of the fingerprint imaging mould group.And light propagation side produced by point light source To consistency it is preferable, stray light is less, thus using point light source way be conducive to improve fingerprint image quality.Due to described Light source 110 is point light source, so light caused by the light source 110 is with certain angle of divergence from the light-emitting surface of the light source 110 Outgoing.

In the present embodiment, the light source 110 is side light source, so the light source 110 is located at described image sensor 120 Side, and the light-emitting surface of the light source 110 is towards described image sensor 120.It is described but in other embodiments of the invention Light source also can be set below described image sensor.

It should be noted that the fingerprint imaging mould group further includes sensing face 130, for receiving touch in the present embodiment. Light caused by the light source 110 is projected to the sensing face 130, and reflection and refraction occur in the sensing face 130, To form reflected light；By the pixel battle array of described image sensor 120 on the reflected light projects to described image sensor 120 Column 121 are acquired to carry out photoelectric conversion.When carrying out fingerprint collecting, finger is pressed in the sensing face 130, therefore the sensing Formed reflected light carries finger print information on face 130, so described image sensor 120 is by carrying out light to the reflected light Electricity conversion can obtain fingerprint image.

Specifically, the fingerprint imaging mould group has cover-plate glass, it is located at the light source 110 and described image sensor On 120；A side surface of the cover-plate glass far from the light source 110 and described image sensor 120 is the sensing face 130。

Described image sensor 120 is located at 110 side of light source, for acquiring the reflected light optical signal, and carries out Photoelectric conversion exports electric signal relevant to the optical signal to obtain image.

The light as caused by the light source 110 is emitted with certain angle of divergence from the light-emitting surface of the light source 110, Formed reflected light is also to be emitted with certain angle of divergence from the sensing face 130, is projected in described image sensor 120, institute With reflected light suffered by different location in described image sensor 120 irradiation intensity with the increase of distance between light source and Reduce, i.e., in described image sensor 120, the intensity of reflected light irradiation suffered by the position of the close light source 110 is larger, far The intensity of the irradiation of reflected light suffered by position from the light source 110 is smaller.

In the present embodiment, the shading light modulation layer 122 between the pixel array 121 and the sensing face 130, because Shading light modulation layer 122 described in the reflection light transmission formed in this described sensing face 130, is projected on the pixel array 121, with Carry out photoelectric conversion.

In conjunction with reference Fig. 7, Fig. 7 be in the group embodiment of fingerprint imaging mould shown in Fig. 6 imaging sensor 120 and light source 110 along A The overlooking structure diagram in direction.

In the present embodiment, described image sensor 120 is face array image sensor, so the pixel array 121 wraps Multiple pixel units (not indicating in figure) being arranged in array are included, the pixel unit includes photodiode, the photoelectricity two Pole pipe can acquire the optical signal by illumination, and the optical signal is converted to associated telecommunications Number, to export the electric signal.

In order to reduce design difficulty, reduce technology difficulty, to guarantee manufacturing yield and device performance, the pixel array In 121, the structure of all pixels unit is all the same, i.e., the film layer structure of all pixels unit, structure in the described pixel array 121 The technological parameters such as size, film material are all the same, thus in the pixel array 121 all pixels unit daylighting area it is homogeneous Together.

The shading light modulation layer 122 is used for shield portions reflected light, and part is made to reflect light transmission, is projected to adjust The reflected light light intensity of different location pixel unit on the pixel array 121, and then adjust and do not carry out picture when fingerprint collecting The sensitive volume uniformity of pixel unit at 121 different location of pixel array.

Specifically, the dimming section 123 in the shading light modulation layer 122 is only capable of light from light modulation for blocking reflected light Gap location between portion 123 transmits the shading light modulation layer 122.

The intensity of the irradiation of the reflected light as suffered by different location in described image sensor 120 is with the spacing with light source From increase and reduce, that is to say, that even if without fingerprint collecting, in the shading light modulation layer 122, far from the light source The exposure intensity of reflected light suffered by 110 position is weaker, and the irradiation of reflected light suffered by the position of the close light source 110 is strong It spends stronger.

Spacing between the adjacent dimming section 123 increases with the increase of distance between the light source 110, also It is to say, along the direction B backwards to the light source 110, spacing is gradually increased between the dimming section 123.

Specifically, as shown in fig. 7, close to the light source 110 position at, between dimming section 123a and dimming section 123b between Gap a1 is smaller, and the area being spaced between the dimming section 123a and the dimming section 123b is smaller, the dimming section 123a and institute The area that interval underlying pixel array corresponding position can be reflected light irradiation between dimming section 123b is stated also to reduce therewith, from And the sensitive volume of 121 corresponding position of pixel array can be reduced；Far from the light source 110 position at, dimming section 123c and Gap b1 is larger between dimming section 123d, and the area being spaced between the dimming section 123c and the dimming section 123d is larger, institute Light irradiation can be reflected by stating interval 121 corresponding position of underlying pixel array between dimming section 123c and the dimming section 123d Area also increase with it, so as to maintain the sensitive volume of 121 corresponding position of pixel array.

Close to the reduction of 121 sensitive volume of pixel array at 110 position of light source, far from picture at 110 position of light source The maintenance of 121 sensitive volume of pixel array can effectively reduce the difference of sensitive volume at 121 different location of pixel array, be conducive to mention The uniformity of high sensitive volume is conducive to improve fingerprint image quality.

In the present embodiment, the light source 110 is light emitting diode, is not being carried out according to light produced by the light source 110 Formed reflected light is on the pixel array 121 the case where being distributed when fingerprint collecting, the spacing between adjacent dimming section 123 with Between the light source 110 increase of distance and linearly increase.In other embodiments of the invention, according to produced by the light source The case where light is distributed on formed reflected light projects to the pixel array when not carrying out fingerprint collecting, adjacent dimming section it Between spacing changing rule and the light source between the relationship of distance distance may be other relationships.

In the present embodiment, the material of the dimming section 123 is metal, is realized by the effect reflected and absorbed to the light Line blocks.Since the material of the dimming section 123 is metal, the dimming section can be made using semiconductor technology 123, so as to improve spacing and its precision of variation between the dimming section 123 and adjacent dimming section 123, and then improve The shading light modulation layer 122 can be reflected the precision of photoirradiated surface product control to the pixel array 121, be conducive to described The precise controlling of 121 different location sensitive volume of pixel array, is conducive to the raising of the sensitive volume uniformity and fingerprint image quality.

And the pixel array 121 is also to be formed by semiconductor technology, therefore by the material of the dimming section 123 The way for being set as metal can also improve the shading light modulation layer 122 and the pixel array 121 formation process compatibility, make The formation of the pixel array 121 and the formation of the dimming section 123 are formed by same technique producing line, can effectively ensure that institute State the formation quality and manufacturing yield of pixel array 121 and the dimming section 123, additionally it is possible to simplify processing step, reduce work Skill difficulty.

As shown in fig. 7, the dimming section 123 is the threadiness being arranged around the light source 110 in the present embodiment, i.e., it is described Projection of the dimming section 123 on 121 surface of pixel array surrounds the light source 110, and the dimming section 123 is projected as line Shape.Since the dimming section 123 is the threadiness being arranged around the light source 110, between the corresponding adjacent dimming section 123 Gap is that the shape of the exposed pixel array 121 in gap is also between the band-like of the light source 110, adjacent dimming section 123 Around the band-like of the light source 110.Since the light source 110 is point light source, so this set method can effectively reduce institute State light source 110 between adjacent dimming section 123 in gap underlying pixel array 121 different location optical path length, can be effective The uniformity that same interval underlying pixel array 121 is reflected photo-irradiation intensity is improved, mentioning for the sensitive volume uniformity is conducive to It is high；But also can reduce the design difficulty and manufacture difficulty in the dimming section 123 and its gap, be conducive to improve manufacturing yield And device performance.

In the present embodiment, the shape of the dimming section 123 is zhou duicheng tuxing, and the light source 110 is located at the dimming section Symmetry axis on, i.e., the described dimming section 123 is projected as axisymmetric figure, and the light 121 surface of pixel array Source 110 is on the symmetry axis that the position of 121 surface projection of pixel array is located at the dimming section 123 projection.By the tune Light portion 123 is shaped to the way of zhou duicheng tuxing, advantageously reduces optical path difference, is conducive to improve the uniform of sensitive volume Degree, additionally it is possible to reduce and manufacture and design difficulty, be conducive to maintain higher yield and device performance.

Specifically, the shape of the dimming section 123 be it is arc-shaped, i.e., the described dimming section 123 is in 110 table of pixel array Being projected as face is arc-shaped.In other embodiments of the invention, the shape of the dimming section can also be U-shaped, i.e., the described dimming section U-shaped is projected as on the pixel array surface.

In the present embodiment, the line width of the multiple dimming section 123 is equal, i.e., vertical 123 extending direction of dimming section, The size of the multiple dimming section 123 is equal.This way can be improved the uniformity of 123 shape of dimming section, can Technology difficulty is reduced, to advantageously reduce manufacturing yield loss, improves device performance.

In the present embodiment, the line width of the dimming section 123 is equal to design rule minimum value；The spacing of adjacent dimming section 123 More than or equal to design rule.

It should be noted that design rule is using proper device operation as condition, according to horizontal (including the photoetching of actual process Characteristic, etching power, alignment tolerance etc.) and yield rate requirement, between the one group of same process layer and different process layer provided The rules such as the limitation of geometric dimension mainly may include: line width, line-spacing, cover, appear, recess, area, provide them respectively Minimal design value, to prevent the appearance of fracture, the connection and some bad physical effects of mask pattern.Design rule content institute The working ability for describing integrated circuit technology line is with width, spacing and the lap of each layer set figure of mask plate The minimum acceptable value of equal technological parameters is form appearance.

It sets equal with design rule minimum value for the line width of the dimming section 123, just refers to and guaranteeing manufacturing yield Under the premise of device performance, the minimum dimension of the dimming section 123 is that the fingerprint imaging mould group manufactures producing line technological ability Minimum dimension.

123 size of dimming section is smaller, then the adjustable range in gap is bigger between adjacent dimming section 123, degree of regulation It is higher, so as to effectively improve adjustable range and degree of regulation to reflected light irradiated area.So by the dimming section 123 It is sized to the minimum value of technological ability, can effectively expand the design space of the dimming section 123, expand the shading Light modulation layer 122 improves degree of regulation to the adjustable range of reflected light, is conducive to accurately control the different positions of the pixel array 121 The uniformity for setting sensitive volume is conducive to the improvement of fingerprint image quality and precision.

It should be noted that the pixel cell size is relatively large in other embodiments of the invention, then the dimming section Line width can also be greater than design rule minimum value, to reduce the formation process difficulty of the dimming section, guarantee manufacturing yield And device performance.

Spacing between adjacent dimming section 123 is set greater than to or is equal to design rule, just refers to and is guaranteeing manufacturing yield Under the premise of device performance, the minimum dimension of spacing is design rule minimum value, i.e., adjacent light modulation between adjacent dimming section 123 The minimum dimension of spacing is the minimum dimension that the fingerprint imaging mould group manufactures producing line technological ability between portion 123.Adjacent light modulation Spacing is too small between portion 123, then may will increase between adjacent dimming section 123 and the probability being overlapped occur, then reflected light can not be saturating Penetrate the shading light modulation layer 122, to influence the acquisition of 121 optical signal of pixel array, therefore by adjacent dimming section 123 it Between spacing be set as the way of technological ability minimum dimension, can either guarantee the formation in gap, guarantee 121 light of pixel array The acquisition of signal also can effectively expand the design space of the dimming section 123, expand 122 pairs of shading light modulation layer reflections The adjustable range of light improves degree of regulation, is conducive to accurately control the uniform of the 121 different location sensitive volume of pixel array Degree, is conducive to the improvement of fingerprint image quality.

It should be noted that in the present embodiment, the pixel unit further include: switching device, with the photodiode It is connected, for controlling the output of the obtained electric signal of the photodiode.So the shading light modulation layer further includes light shielding part (not shown) corresponds with the switching device and is set to the switching device corresponding position.

The light shielding part prevents light from transmiting on the switching device and influencing the switching device for shutting out the light Performance.In the present embodiment, the switching device is amorphous silicon switching device, therefore the light shielding part can prevent the amorphous silicon Switching device performance degradation problem because caused by by illumination is conducive to the stability for improving the fingerprint imaging mould group and makes Use the service life.

So the shading light modulation layer 122 can be realized by the shading metal of the switching device, so as to simplification The structure of the fingerprint imaging mould group, is conducive to the raising of device performance and manufacturing yield, help to obtain compared with high imaging quality Fingerprint imaging mould group.

Correspondingly, the present invention also provides a kind of electronic equipment.

The electronic equipment includes fingerprint imaging mould group, and the fingerprint imaging mould group is fingerprint fingerprint imaging mould of the invention Group.

For acquiring fingerprint image, the electronic equipment is obtained the fingerprint imaging mould group according to the fingerprint imaging mould group Fingerprint image is obtained to be further processed.Specifically, the electronic equipment is carried out according to the fingerprint image in the present embodiment Authentication.The fingerprint imaging mould group is fingerprint imaging mould group of the invention, so the specific skill of the fingerprint imaging mould group Art scheme, with reference to the specific embodiment of aforementioned fingerprint imaging modules, details are not described herein by the present invention.

Shading light modulation layer in the fingerprint imaging mould group can effectively improve the uniform of sensitive volume within the scope of pixel array Degree, is conducive to achieve the purpose that fingerprint image quality.Therefore the electronic equipment is obtained using the fingerprint imaging mould group Fingerprint image is further processed, and good Information base can be provided for subsequent processing, can effectively improve authentication Accuracy and verification efficiency are conducive to the performance for improving the electronic equipment.

With reference to Fig. 8 to Figure 13, the structural representation of another one embodiment of fingerprint imaging mould group provided by the present invention is shown Figure.

The fingerprint imaging mould group includes: light source 210；Imaging sensor 220, positioned at the side of the light source 210, including Pixel array 221 and the shading light modulation layer 222 on the pixel array 221, the pixel array 221 include arranging in array The pixel unit 223 of cloth, the shading light modulation layer 222 include the light modulation group 224 on the pixel unit 223, the tune Light group 224 includes multiple dimming sections 225 (as shown in Figure 10, Figure 11 or Figure 12), and the spacing between adjacent dimming section 225 is with institute It states the increase of distance between light modulation group 224 and light source 110 and increases.

Wherein, Fig. 8 is the schematic diagram of the section structure of the fingerprint imaging mould group embodiment, and Fig. 9 is fingerprint imaging shown in Fig. 8 Along the overlooking structure diagram in the direction C, Figure 10 is Fig. 9 institute for light source 110 described in mould group embodiment and described image sensor 220 Show the enlarged structure schematic diagram of light modulation group 224a in fingerprint imaging mould group embodiment, Figure 11 is that the group of fingerprint imaging mould shown in Fig. 9 is real The enlarged structure schematic diagram of light modulation group 224b in example is applied, Figure 12 is light modulation group 224c in the group embodiment of fingerprint imaging mould shown in Fig. 9 Enlarged structure schematic diagram, Figure 13 is the enlarged structure schematic diagram of light modulation group 224m in the group embodiment of fingerprint imaging mould shown in Fig. 9.

In the light modulation group 224 between adjacent dimming section 225 spacing with the light modulation group 224 and light source 210 spacing From increase and increase.Therefore in the light modulation group 224 (such as light modulation group 224a) of the light source 210, adjacent dimming section 225 Spacing is smaller between (as shown in Figure 10), and the area that the light modulation group 224 is transmissive to light is smaller, therefore the light modulation group 224 can reduce the transmission of light, and the reduction of transmitted ray can be effectively reduced pixel list corresponding to 224 lower section of light modulation group The sensitive volume of member 223；In light modulation group 224 (such as light modulation group 224b) far from the light source 210, adjacent dimming section 225 (is such as schemed 11) spacing is larger between, and the area that the light modulation group 224 is transmissive to light is larger, therefore the light modulation group 224 can guarantee The transmission of light, light transmission guarantee effectively to maintain the photosensitive of pixel unit 223 corresponding to 224 lower section of light modulation group Amount.So the way of the shading light modulation layer 222 is arranged, pixel unit at 221 different location of pixel array can be effectively reduced The difference of 223 sensitive volumes is conducive to the raising of the sensitive volume uniformity in entire 221 range of pixel array, is conducive to improve and be obtained Obtain the quality of fingerprint image.

The light source 210 is for generating light, to pass through the reflection of light and refraction acquisition finger print information, acquisition fingerprint image Picture.

In the present embodiment, the light source 210 is point light source.Specifically, the light source 210 is light emitting diode, to reduce The volume of the fingerprint imaging mould group reduces the energy consumption of the fingerprint imaging mould group.And light propagation side produced by point light source To consistency it is preferable, stray light is less, thus using point light source way be conducive to improve fingerprint image quality.Due to described Light source 110 is point light source, so light caused by the light source 110 is with certain angle of divergence from the light-emitting surface of the light source 110 Outgoing.

The light source 210 is side light source, so the light source 210 is located at the side of described image sensor 220, and institute The light-emitting surface of light source 210 is stated towards described image sensor 220, light caused by the light source 210 with certain angle of divergence from The light-emitting surface of the light source 210 is emitted.But in other embodiments of the invention, the light source also can be set to be passed in described image Below sensor.

It should be noted that the fingerprint imaging mould group further includes sensing face 230, for receiving touch in the present embodiment. Light caused by the light source 210 is projected to the sensing face 230, and reflection and refraction occur in the sensing face 230, To form reflected light；By the pixel battle array of described image sensor 220 on the reflected light projects to described image sensor 220 Column 221 are acquired to carry out photoelectric conversion.When carrying out fingerprint collecting, finger is pressed in the sensing face 230, therefore the sensing Formed reflected light carries finger print information on face 230, so described image sensor 220 is by carrying out light to the reflected light Electricity conversion can obtain fingerprint image.

Specifically, the fingerprint imaging mould group has cover-plate glass, it is located at the light source 210 and described image sensor On 220；A side surface of the cover-plate glass far from the light source 210 and described image sensor 220 is the sensing face 230。

Described image sensor 220 is located at 210 side of light source, for acquiring the reflected light optical signal, and carries out Photoelectric conversion exports electric signal relevant to the optical signal to obtain image.

The light as caused by the light source 210 is emitted with certain angle of divergence from the light-emitting surface of the light source 210, Formed reflected light is also to be emitted with certain angle of divergence from the sensing face 230, is projected in described image sensor 220, institute With reflected light suffered by different location in described image sensor 220 irradiation intensity with the increase of distance between light source and Reduce, i.e., in described image sensor 220, the intensity of reflected light irradiation suffered by the position of the close light source 210 is larger, far The intensity of the irradiation of reflected light suffered by position from the light source 210 is smaller.

As shown in figure 9, described image sensor 220 is face array image sensor, so the pixel in the present embodiment Array 221 includes multiple pixel units 223 being arranged in array, and the pixel unit 223 includes photodiode, the photoelectricity Diode can acquire the optical signal by illumination, and the optical signal is converted to associated electricity Signal, to export the electric signal.

It is in general, described to guarantee manufacturing yield and device performance in order to reduce design difficulty, reduce technology difficulty In pixel array 221, the structure of all pixels unit 223 is all the same, i.e., all pixels unit 223 in the described pixel array 221 The technological parameters such as film layer structure, structure size, film material it is all the same, therefore all pixels list in the pixel array 221 The daylighting area of member 223 is all the same.

The shading light modulation layer 222 is used for shield portions reflected light, and part is made to reflect light transmission, is projected to adjust The reflected light light intensity of different location pixel unit 223 on the pixel array 221, and then described in adjusting when not carrying out fingerprint collecting The sensitive volume uniformity of pixel unit 223 at 221 different location of pixel array.

In the present embodiment, the shading light modulation layer 222 between the pixel array 221 and the sensing face 230, because Shading light modulation layer 222 described in the reflection light transmission formed in this described sensing face 230 is projected on the pixel array 221, with Carry out photoelectric conversion.

As shown in Fig. 9 to Figure 13, the shading light modulation layer 222 includes multiple light modulation groups 224 (as shown in Figure 10 to Figure 13), The light modulation group 224 is corresponded with the pixel unit 223, and is set to the corresponding position of the pixel unit 223, institute The dimming section 225 in light modulation group 224 is stated for shield portions reflected light, and makes part reflected light between the dimming section 225 Realize transmission in gap.

The intensity of the irradiation of the reflected light as suffered by different location in described image sensor 220 is with the spacing with light source From increase and reduce, that is to say, that even if without fingerprint collecting, far from the light source 210 light modulation group 224b suffered by The exposure intensity of reflected light is weaker, and the exposure intensity of reflected light suffered by the light modulation group 224a close to the light source 110 is stronger.

Spacing between the adjacent dimming section 225 with distance between the light modulation group 224 and the light source 210 increasing Increase greatly, that is to say, that along the direction backwards to the light source 110, the reflection light transmission can be made in the light modulation group 224 Area be gradually increased.

Specifically, as shown in Figure 10, being closer between the light modulation group 224a and the light source 210, therefore the tune Gap a2 is smaller between adjacent dimming section 225 in light group 224a, can make in the light modulation group 224a light transmit area compared with Small, the area that pixel unit 223a corresponding to the lower section light modulation group 224a can be reflected light irradiation is smaller, the picture The sensitive volume of plain unit 223a also reduces therewith.

As shown in figure 11, compared with the light modulation group 224a (as shown in Figure 10), the light modulation group 224b and the light source Relatively far away from, gap b2 is greater than the light modulation group 224a to distance between adjacent dimming section 225 in the light modulation group 224b between 210 In gap a2 (as shown in Figure 10) between adjacent dimming section 225, therefore the face that in the light modulation group 224b light can transmit Product is bigger than the area that in the dimming section 224a light can transmit, pixel unit corresponding to the lower section light modulation group 224b The area that 223b can be reflected light illumination is larger, and the sensitive volume of the pixel unit 223b obtains a degree of maintenance.

Close to the reduction of pixel unit 223a (as shown in Figure 10) sensitive volume of the light source 210, far from the light source 110 Pixel unit 223b sensitive volume maintenance, can effectively reduce between the pixel unit 223b and the pixel unit 223a The difference of sensitive volume, so as to effectively improve in 221 range of pixel array, between different location pixel unit 223 The uniformity of sensitive volume, so as to effectively improve the quality of the obtained fingerprint of described image sensor.

In the present embodiment, the light source 210 is light emitting diode, is not being carried out according to light produced by the light source 210 Formed reflected light on the pixel array 221 the case where being distributed when fingerprint collecting, the adjacent tune in the light modulation group 224 Spacing between light portion 225 linearly increases with the increase of distance between the light modulation group 224 and the light source 210.This hair In bright other embodiments, according to light produced by the light source when not carrying out fingerprint collecting formed reflected light projects to described The case where being distributed on pixel array, the relationship of distance can also between the changing rule and the light source of spacing between adjacent dimming section Think other relationships.

In the present embodiment, the dimming section 225 is metal block, and the light modulation group 224 is the metal block matrix of array arrangement. Light can transmit the metal block matrix from gap between the row and row of array arrangement metal block or between the column and the column, from And transmit the shading light modulation layer 222.Since the dimming section 225 is metal block, the light modulation group 224 is metal block matrix, Therefore semiconductor technology can be used to make the dimming section 225 to constitute the light modulation group 224, so as to improve the tune The precision of gap and its variation between light portion 225 and dimming section 225, and then accurately controlling can be saturating in the light modulation group 224 The area for penetrating light is conducive to the precise controlling of 223 sensitive volume of different location pixel unit, is conducive to the pixel array 221 The raising of the sensitive volume uniformity in range, is conducive to the raising of fingerprint image quality.

And the pixel array 221 and pixel unit 223 be also is formed by semiconductor technology, therefore will described in The way that the material of dimming section 225 is set as metal can also improve the shading light modulation layer 222 and the pixel array 221 with And 223 formation process of the pixel unit compatibility, make formation and the institute of the pixel array 221 and the pixel unit 223 The formation for stating dimming section 225 is formed by same technique producing line, can effectively ensure that the pixel array 121, the pixel list The formation quality and manufacturing yield of member 223 and the shading light modulation layer 222, additionally it is possible to simplify processing step, reduce technique Difficulty.

In the present embodiment, the line width of the dimming section 225 is equal.In the present embodiment, the dimming section 225 is metal Block, the light modulation group 224 are the metal block matrix of array arrangement, and the line width of the dimming section 225 refers to along the metal block square The line direction or column direction of battle array, the size of the metal block, that is to say, that in the present embodiment, the side length of the dimming section 225 It is equal.This way can be improved the uniformity of 225 shape of dimming section, can reduce technology difficulty, to be conducive to Manufacturing yield loss is reduced, device performance is improved.

In the present embodiment, the line width of the dimming section 225 is equal to design rule minimum value；It is adjacent in the light modulation group 224 Spacing between dimming section 225 is greater than or equal to design rule.

The line width of the dimming section 225 is equal to design rule minimum value, just refer to guarantee manufacturing yield and Under the premise of device performance, the minimum dimension of the dimming section 225 is that the fingerprint imaging mould group manufactures producing line technological ability Minimum dimension.225 size of dimming section is smaller, then the adjustable range in gap is bigger between adjacent dimming section 225, then light modulation group The variation range of light transmission area can be made bigger in 224, the adjustable range of 224 pairs of reflected lights of light modulation group is bigger, right The adjustable range of 223 sensitive volume of pixel unit and degree of regulation corresponding to lower section are bigger.So by the ruler of the dimming section 225 The very little minimum value for being set as technological ability can effectively expand the design space of the dimming section 225, expand the shading light modulation The adjustable range of 222 pairs of reflected light of layer, improves degree of regulation, is conducive to accurately control the 221 different location picture of pixel array The uniformity of plain 223 sensitive volume of unit, is conducive to the improvement of fingerprint image quality.

Spacing between adjacent dimming section 225 is set greater than to or is equal to design rule, just refers to and is guaranteeing manufacturing yield Under the premise of device performance, the minimum dimension of spacing is design rule minimum value, i.e., adjacent light modulation between adjacent dimming section 225 The minimum dimension of spacing is the minimum dimension that the fingerprint imaging mould group manufactures producing line technological ability between portion 225.Adjacent light modulation Spacing is too small between portion 225, then may will increase between adjacent dimming section 225 and the probability being overlapped occur, then reflected light can not be saturating The light modulation group 224 is penetrated, the light modulation group 224 may block reflected light, picture corresponding to 224 lower section of light modulation group completely Plain unit 223 can not then be reflected the irradiation of light, so as to will affect the acquisition of 221 optical signal of pixel array.Cause This sets spacing between adjacent dimming section 225 to the way of technological ability minimum dimension, can either guarantee the formation in gap, protects The acquisition of 221 optical signal of pixel array is demonstrate,proved, setting for the dimming section 225 and the light modulation group 224 also can be effectively expanded Space is counted, expands the shading light modulation layer 222 to the adjustable range of reflected light, improves degree of regulation, is conducive to accurately control not With the uniformity of 223 sensitive volume of position pixel unit, be conducive to the improvement of fingerprint image quality.

It should be noted that the pixel unit 223 is to realize light signal collection, the photoelectricity by photodiode Diode has daylighting region (not shown), the reflected light just meeting being only transmitted through in photodiode daylighting region It is acquired by the photodiode, so the shading light modulation layer 222 is corresponding with the daylighting regional location in the present embodiment, And orthographic projection range of the shading light modulation layer on the pixel unit surface is greater than or equal to the daylighting region, that is, Say, the daylighting region in the range of orthographic projection in the shading light modulation layer 222 is located at corresponding light modulation group 224, thus The effectiveness for improving 224 pairs of the light modulation group, 223 sensitivity of pixel unit improves the shading light modulation layer 222 to anti- The precision for penetrating light adjusting, is conducive to accurately control the uniform of 221 different location pixel unit of pixel array, 223 sensitive volume Degree, is conducive to the improvement of fingerprint image quality.

In addition, in the present embodiment, in the light modulation group 224 quantity of dimming section 225 with the light modulation group 224 with it is described The increase of distance between light source 210 and reduce, to reduce the area to shut out the light in the light modulation group 224, increase the tune Light group 224 can make the area for reflecting light transmission region improve the purpose of regulating power to reach expansion adjustable range.

Figure 12 and Figure 13 is referred to specifically, combining, distance is smaller between light modulation group 224c and the light source 210, such as Figure 12 Shown, in the light modulation group 224c, the quantity of the dimming section 225 is 25, the light modulation group 224a that the dimming section 225 is constituted For 5 × 5 metal block matrix；Distance is larger between light modulation group 224m and the light source 210, as shown in figure 13, the light modulation group In 224m, the quantity of the dimming section 225 is 4, the metal block square that the light modulation group 224m that the dimming section 225 is constituted is 2 × 2 Battle array.

The quantity of dimming section 225 is more in the light modulation group 224c, and the area that shuts out the light in the light modulation group 224c is larger, And gap c2 is smaller between adjacent dimming section 225, and it can be for the light transmissive area surface of reflection in the light modulation group 224c Product is smaller, so the area that the pixel unit 223c corresponding to below the light modulation group 224c is reflected light irradiation is smaller, institute Pixel unit 223c sensitive volume is stated to reduce therewith；The negligible amounts of dimming section 225, the light modulation group in the light modulation group 224m The area that shuts out the light in 224m is smaller, and gap m2 is larger between adjacent dimming section 225 in the light modulation group 224m, the tune Can be larger for the light transmissive region area of reflection in light group 224m, so the picture corresponding to below the light modulation group 224m The area that plain unit 223m is reflected light irradiation is larger, and the pixel unit 223c sensitive volume is guaranteed.

With continued reference to Fig. 9, in the present embodiment, the quantity phase of the quantity of the light modulation group 224 and the pixel unit 223 Deng, and be arranged in a one-to-one correspondence with the pixel unit 223, that is to say, that in the pixel array 221, each pixel unit A light modulation group 224 is provided on 223.Each light modulation group 224 can be individually to suffered by pixel unit 223 corresponding to lower section The intensity irradiated to reflected light is adjusted, therefore this setup can be to reflected light suffered by each pixel unit 223 Exposure intensity is individually adjusted, and so as to effectively improve the precision to 223 sensitive volume of pixel unit control, is conducive to The accurate adjusting of the 223 sensitive volume uniformity of pixel unit described in different location, is conducive to improve in 221 range of pixel array Fingerprint image quality.

As shown in figure 9, the equal light modulation group 224 of spacing is in the pixel battle array between adjacent dimming section 225 in the present embodiment It is distributed on column around the light source 210.The equal 224 pairs of reflected lights of light modulation group of spacing blocks energy between adjacent dimming section 225 Power is identical, therefore can make to reflect light transmissive region area in the equal light modulation group 224 of spacing between adjacent dimming section 225 It is equal, so the equal light modulation group 224 of spacing surrounds the light source on the pixel array 221 between adjacent dimming section 225 The set-up mode of 210 distributions can reduce picture corresponding to equal 224 lower section of light modulation group of spacing between adjacent dimming section 225 The difference of optical path length between plain unit 223 and the light source 210, to be conducive to improve the sense of different location pixel unit 221 The uniformity of light quantity；But also can reduce the difficulty designed and manufactured in the dimming section 225 and its gap, be conducive to improve Manufacturing yield and device performance.

In the present embodiment, the equal light modulation group 224 of spacing is on the pixel array 221 between adjacent dimming section 225 Axial symmetry distribution, the light source 210 are located on symmetry axis.Make the light modulation group 224 that spacing is equal between adjacent dimming section 225 with axis The light source 210 is set on symmetry axis, this method energy on the pixel array 221 by symmetrical formal distribution Enough reduce light between spacing between adjacent dimming section 225 equal 224 lower pixel unit 223 of light modulation group and the light source 210 The difference of road length is conducive to the difference for reducing sensitive volume between pixel unit 223, improves the sensitive volume uniformity, additionally it is possible to drop Low design and manufacture difficulty is conducive to maintain higher yield and device performance.

Specifically, the equal light modulation group 224 of spacing is in the pixel array between adjacent dimming section 225 in the present embodiment Be in U-shape distribution on 221.In other embodiments of the invention, the equal light modulation group of spacing is in the pixel battle array between adjacent dimming section Distribution is arc-shaped on column.

With reference to figs. 14 to Figure 17, multiple light modulations of different location in another embodiment of fingerprint imaging mould group of the present invention are shown The enlarged structure schematic diagram of group.

Wherein, Figure 14 is the enlarged structure schematic diagram with light modulation group 324a corresponding to Figure 10；Figure 15 is right with Figure 11 institute The enlarged structure schematic diagram of the light modulation group 324b answered；Figure 16 is illustrated with the enlarged structure of light modulation group 324c corresponding to Figure 12 Figure；Figure 17 is the enlarged structure schematic diagram with light modulation group 324m corresponding to Figure 13.

The present embodiment and previous embodiment something in common, details are not described herein by the present invention.This law embodiment and aforementioned implementation Example the difference is that, in the present embodiment, the dimming section 325 be metal segments, the light modulation group be multiple gold arranged in parallel Belong to section.

Specifically, as shown in figure 14, being closer between the light modulation group 324a and the light source, therefore the light modulation group Gap a3 is smaller between adjacent dimming section 325 in 324a, corresponding to effectively reducing below the light modulation group 324a The sensitive volume of pixel unit 323a；As shown in figure 15, compared with the light modulation group 324b (as shown in figure 14), the light modulation group Relatively far away from, gap b3 is greater than institute to distance between adjacent dimming section 325 in the light modulation group 324b between 324b and the light source Gap a3 (as shown in figure 14) between adjacent dimming section 325 is stated in light modulation group 323a, therefore biggish in the light modulation group 323b Gap b3 can maintain the sensitive volume of pixel unit 323b corresponding to the lower section light modulation group 324b to a certain extent；So institute The difference of sensitive volume between the pixel unit 323b and the pixel unit 323a, energy can be effectively reduced by stating shading light modulation layer Enough effective uniformitys for improving sensitive volume between different location pixel unit, are conducive to improve fingerprint image quality.

In the present embodiment, the line width of the dimming section 325 is equal, that is to say, that the vertical metal segments extending direction, The minimum dimension of the metal segments is equal.This way can be improved the uniformity of 325 shape of dimming section, can drop Low technology difficulty improves device performance to advantageously reduce manufacturing yield loss.

It is similar, in order to expand adjustable range, improve regulating power, in the present embodiment, dimming section 325 in the light modulation group Quantity reduce with the increase of distance between the light modulation group and the light source.

Specifically, distance is smaller between light modulation group 324c and the light source, distance between light modulation group 324m and the light source It is larger；As shown in figure 16, in the light modulation group 324c, the quantity of the dimming section 325 is 5, and the light modulation group is parallel by 5 The metal segments of setting are constituted；As shown in figure 17, in the light modulation group 324m, the quantity of the dimming section 325 is 2, the tune Light group is made of 2 metal segments disposed in parallel.

Gap c3 is greater than adjacent dimming section in the light modulation group 324m between adjacent dimming section 325 in the light modulation group 324c Gap m3 between 325, therefore it is greater than the light modulation group 324m in the light modulation group 324c for reflecting light transmissive region area In for reflecting light transmissive region area, so the sensitive volume of the pixel unit 323c corresponding to below the light modulation group 324c It is reduced, the sensitive volume of pixel unit 323m corresponding to the lower section light modulation group 324m is maintained.

It should be noted that in the present embodiment, the pixel unit further include: switching device (not shown), with institute It states photodiode to be connected, for controlling the output of the obtained electric signal of the photodiode.So the shading light modulation layer Further include light shielding part (not shown), is corresponded with the switching device and be set to the switching device corresponding position Place.

So the shading light modulation layer can be realized by the shading metal of the switching device, so as to described in simplification The structure of fingerprint imaging mould group, is conducive to the raising of device performance and manufacturing yield, help to obtain the finger compared with high imaging quality Line imaging modules.

Light modulation group in the shading light modulation layer can effectively improve the uniformity of different location pixel unit sensitive volume, have Conducive to the precision of obtained fingerprint signal is improved, to achieve the purpose that improve fingerprint image quality, improve fingerprint image precision. Therefore the electronic equipment is further processed using the fingerprint imaging mould group fingerprint image obtained, can be subsequent Processing provides good Information base, can effectively improve the precision and accuracy of authentication, be conducive to improve the electronics The performance of equipment.

Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute Subject to the range of restriction.

Claims

1. a kind of fingerprint imaging mould group characterized by comprising

Light source；

Imaging sensor, the shading light modulation layer including pixel array and on the pixel array, the shading light modulation layer packet Multiple dimming sections are included, the spacing between the adjacent dimming section increases with the increase of distance between the light source.

2. fingerprint imaging mould group as described in claim 1, which is characterized in that spacing between the adjacent dimming section with The increase of distance between the light source and linearly increase.

3. fingerprint imaging mould group as described in claim 1, which is characterized in that the spacing between adjacent dimming section is greater than or equal to Design rule.

4. fingerprint imaging mould group as described in claim 1, which is characterized in that the dimming section is to be arranged around the light source It is linear.

5. fingerprint imaging mould group as claimed in claim 4, which is characterized in that the line width of the multiple dimming section is equal.

6. fingerprint imaging mould group as claimed in claim 1 or 5, which is characterized in that the line width of the dimming section is greater than or equal to Design rule minimum value.

7. fingerprint imaging mould group as described in claim 1, which is characterized in that the shape of the dimming section is zhou duicheng tuxing, The light source is located on the symmetry axis of the dimming section.

8. fingerprint imaging mould group as claimed in claim 1 or 7, which is characterized in that the shape of the dimming section is U-shaped or circular arc The threadiness of shape.

9. fingerprint imaging mould group as described in claim 1, which is characterized in that the material of the dimming section is metal.

10. fingerprint imaging mould group as described in claim 1, which is characterized in that the pixel array includes being arranged in array Pixel unit, the pixel unit include: switching device；

The shading light modulation layer further includes light shielding part, corresponds with the switching device and to be set to the switching device corresponding At position.

11. fingerprint imaging mould group as claimed in claim 10, which is characterized in that the switching device is amorphous switching device.

12. fingerprint imaging mould group as described in claim 1, which is characterized in that the light source is point light source.

13. a kind of electronic equipment characterized by comprising such as claim 1 to claim 12 any one claim institute The fingerprint imaging mould group stated.

14. a kind of fingerprint imaging mould group characterized by comprising

Light source；

Imaging sensor, the shading light modulation layer including pixel array and on the pixel array, the pixel array include The pixel unit being arranged in array, the shading light modulation layer include the light modulation group on the pixel unit, the light modulation group Including multiple dimming sections, the spacing between adjacent dimming section increases with the increase of distance between the light modulation group and light source.

15. fingerprint imaging mould group as claimed in claim 14, which is characterized in that in the light modulation group the adjacent dimming section it Between spacing linearly increase with the increase of distance between the light modulation group and the light source.

16. fingerprint imaging mould group as claimed in claim 14, which is characterized in that in the light modulation group between adjacent dimming section Spacing is greater than or equal to design rule.

17. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the line width of the dimming section is equal.

18. the fingerprint imaging mould group as described in claim 14 or 17, which is characterized in that the line width of the dimming section is greater than or waits In design rule minimum value.

19. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the dimming section is metal block, the light modulation Group is the metal block matrix of array arrangement.

20. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the dimming section is metal segments, the light modulation Group is multiple metal segments arranged in parallel.

21. fingerprint imaging mould group as claimed in claim 14, which is characterized in that in the light modulation group quantity of dimming section with The increase of distance between the light modulation group and the light source and reduce.

22. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the quantity of the light modulation group and the pixel list First quantity is equal, and is arranged in a one-to-one correspondence with the pixel unit.

23. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the equal light modulation of spacing between adjacent dimming section Group surrounds the distribution of light sources on the pixel array.

24. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the equal light modulation of spacing between adjacent dimming section Group is axisymmetricly distributed on the pixel array, and the light source is located on symmetry axis.

25. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the equal light modulation of spacing between adjacent dimming section Group be in U-shape on the pixel array distribution or arc-shaped distribution.

26. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the pixel unit includes photodiode, The photodiode has daylighting region；

The shading light modulation layer is corresponding with the daylighting regional location, and the shading light modulation layer is on the pixel unit surface Orthographic projection range is greater than or equal to the daylighting region.

27. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the pixel unit further include: switching device；

28. such as the fingerprint imaging mould group of claim 27, which is characterized in that the switching device is amorphous switching device.

29. fingerprint imaging mould group as claimed in claim 14, which is characterized in that the light source is point light source.

30. a kind of electronic equipment, which is characterized in that as described in claim 14 to claim 29 any one claim Fingerprint imaging mould group.