CN105184230B - Optical fingerprint sensor and electronic product - Google Patents
Optical fingerprint sensor and electronic product Download PDFInfo
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- CN105184230B CN105184230B CN201510500285.XA CN201510500285A CN105184230B CN 105184230 B CN105184230 B CN 105184230B CN 201510500285 A CN201510500285 A CN 201510500285A CN 105184230 B CN105184230 B CN 105184230B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
A kind of optical fingerprint sensor and electronic product.The optical fingerprint sensor includes: pixel substrate；Ink layer is located at the pixel substrate upper surface or is located above the pixel substrate；The ink layer includes equally distributed multiple apertures, and the perforated area accounts for the 0.1%~10% of the entire ink layer area.The optical fingerprint sensor has the ink layer of multiple apertures by setting, and perforated area accounts for the 0.1%~10% of ink layer area, to both overcome the problems, such as color-match, transmitance is overcome the problems, such as again, so that the fingerprint imaging effect of optical fingerprint sensor is improved, but also optical fingerprint sensor does not have to the selection for considering backlight color and appearance color, the scheme of random color light source is realized, and the appearance color of optical fingerprint sensor meets user's requirement.
Description
Technical field
The present invention relates to fingerprint sensing field more particularly to a kind of optical fingerprint sensors and electronic product.
Background technique
Fingerprint imaging identification technology is the fingerprint image that human body is collected by fingerprint sensor, then and in system
Existing fingerprint imaging information is compared, and whether carrying out correct judgment, and then realizes the technology of identification.The side used due to it
Just property and the uniqueness of somatic fingerprint, fingerprint identification technology have been widely used in every field.Such as public security bureau and customs
Etc. field of safety check, the access control system of building and the consumer product areas such as PC and mobile terminal etc..
The implementation of fingerprint imaging technique has the multiple technologies such as optical imagery, capacitance imaging and ultrasonic imaging.Come relatively
It says, optical image technology, imaging effect is relatively preferable, and equipment cost is relatively low.
Existing optical fingerprint sensor needs to consider that optical finger print senses when being assembled to the electronic products such as mobile terminal
The matching problem and optical fingerprint sensor internal backlight source and appearance face of device appearance color and mobile terminal outer cover plate color
The color-match problem of color.Also, when carrying out the color-match, it is also necessary to while considering the transmission of optical fingerprint sensor
Rate problem.
Summary of the invention
Problems solved by the invention is to provide a kind of optical fingerprint sensor and electronic product, to improve optical finger print sensing
The performance of device.
To solve the above problems, the present invention provides a kind of optical fingerprint sensor, comprising:
Pixel substrate；
Ink layer is located at the pixel substrate upper surface or is located above the pixel substrate；
The ink layer includes equally distributed multiple apertures, and the perforated area accounts for the entire ink layer area
0.1%~10%.
Optionally, the optical fingerprint sensor further includes cover sheet, and the cover sheet is located at the pixel substrate
Top, the ink layer are located at the upper surface or lower surface of the cover sheet.
Optionally, the ink layer is located at the upper surface of the cover sheet, and the ink layer is covered by scratch resistant layer.
Optionally, the pixel substrate has pixel array, and the pixel array has multiple pixels, each pixel
Plan view shape be rectangle, the side length of the rectangle is more than or equal to 10 μm, and the plan view shape of the aperture is parallelogram, institute
Stating the distance between parallelogram opposite side is 1 μm~3 μm.
Optionally, there is glue-line, the ink layer is fixed on respectively by the glue-line between the ink layer and each surface
Surface.
Optionally, the ink layer with a thickness of 5 μm~20 μm, the glue-line with a thickness of 10 μm or less.
Optionally, the perforated area accounts for the 2%~4% of the entire ink layer area.
Optionally, the ink layer include it is multiple be intervally arranged first axis the first ink strip and multiple be intervally arranged
In second the second axial ink strip, the aperture is surrounded by first ink strip and the second ink strip.
To solve the above problems, the present invention provides a kind of electronic products, comprising:
Optical fingerprint sensor, the optical fingerprint sensor have pixel substrate；
Outer cover plate is located above the pixel substrate, and the outer cover plate has through-hole or blind hole, and the through-hole runs through institute
The upper and lower surfaces of outer cover plate are stated, the blind hole is located at the upper surface or lower surface of the outer cover plate；
Ink layer is located at the pixel substrate upper surface or is located above the pixel substrate；
The ink layer includes equally distributed multiple apertures, and the area of the aperture accounts for the entire ink layer area
0.1%~10%.
Optionally, the outer cover plate has the through-hole, and the optical fingerprint sensor further includes being located at the pixel base
Cover sheet above plate, in the through hole, the ink layer is located at the upper of the cover sheet for the cover sheet assembly
Surface or lower surface.
Optionally, the ink layer is located at the upper surface of the cover sheet, and the ink layer is covered by scratch resistant layer.
Optionally, the outer cover plate has the blind hole, and the ink layer is located at described in outer cover plate inner surface correspondence
The position of blind hole or the ink layer are located at the position that the outer cover plate outer surface corresponds to the blind hole.
Optionally, the pixel substrate has pixel array, and the pixel array has multiple pixels, each pixel
Plan view shape be rectangle, the side length of the rectangle is more than or equal to 10 μm, and the plan view shape of the aperture is parallelogram, institute
Stating the distance between parallelogram opposite side is 1 μm~3 μm.
Optionally, there is glue-line, the ink layer is fixed on respectively by the glue-line between the ink layer and each surface
Surface.
Optionally, the ink layer with a thickness of 5 μm~20 μm, the glue-line with a thickness of 10 μm or less.
Optionally, the perforated area accounts for the 2%~4% of the entire ink layer area.
Optionally, the ink layer include it is multiple be intervally arranged first axis the first ink strip and multiple be intervally arranged
In second the second axial ink strip, the aperture is surrounded by first ink strip and the second ink strip.
Compared with prior art, technical solution of the present invention has the advantage that
In technical solution of the present invention, there is the ink layer of multiple apertures by being arranged, and perforated area is set and accounts for oil
The 0.1%~10% of layer of ink area to not only overcome the problems, such as color-match, but also overcomes the problems, such as transmitance, so that optical finger print passes
The fingerprint imaging effect of sensor is improved, but also optical fingerprint sensor does not have to the choosing for considering backlight color and appearance color
It takes, realizes the scheme of random color light source, and the appearance color of optical fingerprint sensor is also made to meet user's requirement.
Detailed description of the invention
Fig. 1 is optical fingerprint sensor structural schematic diagram provided in an embodiment of the present invention；
Fig. 2 is the pixel array portion area schematic in optical fingerprint sensor shown in Fig. 1, on pixel substrate；
Fig. 3 is the structural schematic diagram on region shown in Fig. 2 with ink layer；
Fig. 4 is a kind of enlarged diagram that ink layer shown in Fig. 3 is surrounded part by dotted line frame；
Fig. 5 is another enlarged diagram that ink layer shown in Fig. 3 is surrounded part by dotted line frame；
Fig. 6 shows mobile terminal front view provided by another embodiment of the present invention；
Fig. 7 shows the schematic diagram of the section structure that mobile terminal shown in Fig. 6 is obtained along A-A chain-dotted line cutting；
Fig. 8 shows mobile terminal front view provided by another embodiment of the present invention；
Fig. 9 shows the schematic diagram of the section structure that mobile terminal shown in Fig. 8 is obtained along B-B chain-dotted line cutting.
Specific embodiment
Existing optical fingerprint sensor needs to consider that optical finger print senses when being assembled to the electronic products such as mobile terminal
The matching problem of device appearance color and mobile terminal outer cover plate color.For example, when mobile terminal outer cover plate is the first color, optics
Fingerprint sensor appearance is usually also required to be set as the first color, thus guarantee the overall appearance solid colour of mobile terminal, with
Meet the requirement of user.If the appearance color of optical fingerprint sensor surface corresponding with mobile terminal outer cover plate not set
Same color is counted into, there are significant differences with outer cover plate other positions for optical fingerprint sensor corresponding position, influence mobile terminal
Overall appearance, be unable to satisfy the requirement of user.
The appearance color of optical fingerprint sensor is usually generated by ink layer.Existing optical fingerprint sensor generallys use silk
The ink layer of net mode of printing production flood.However, the ink layer of this flood but makes optical fingerprint sensor encounter backlight
The low problem of transmitance, on the one hand, the color of backlight needs to consider the color of this layer of ink layer, that is to say, that backlight color needs
It is especially chosen, to guarantee that backlight can preferably penetrate this layer of ink layer, on the other hand, when this layer of ink layer is black
When, it may appear that no matter backlight is the case where which kind of color all can not be through this layer of ink layer, causes optical fingerprint sensor can not
Work.
For this purpose, the present invention provides a kind of new optical fingerprint sensor, the optical fingerprint sensor includes pixel substrate
And ink layer, the ink layer is located at the pixel substrate upper surface or is located above the pixel substrate, and the oil
Layer of ink includes equally distributed multiple apertures, and the perforated area accounts for the 0.1%~10% of the entire ink layer area.Due to
With the ink layer, color-match problem when optical fingerprint sensor is subsequent to be assemblied in corresponding electronic products had both been overcome,
Transmitance after overcoming the problems, such as optical fingerprint sensor itself and assembly again, and optical fingerprint sensor is made not have to consider back
The collocation of light color and design appearance color, so as to select the light source of random color, the aperture also improves optics and refers to
The transmitance of line sensor, to improve the imaging effect of optical fingerprint sensor.
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.
The embodiment of the present invention provides a kind of optical fingerprint sensor, please refers to Fig. 1.The optical fingerprint sensor includes picture
Plain substrate 120 and backlight 110, pixel substrate 120 are located in backlight 110, and pixel substrate 120 has corresponding pixel array
(please referring to Fig. 2).The optical fingerprint sensor further includes ink layer 140, and ink layer 140 is located at 120 upper surface of pixel substrate.
Ink layer 140 and pixel substrate also have glue-line 130 between 120 upper surface.Ink layer 140 includes equally distributed multiple apertures
143 (please referring to Fig. 3), and 143 area of aperture can account for the 0.1%~10% of entire 140 area of ink layer.Ink layer 140
Upper is directly finger 150, i.e. finger 150 can directly contact ink layer 140.
In the present embodiment, it is that (aperture opening ratio also known as has aperture opening ratio that 143 area of aperture, which accounts for entire 140 area ratio of ink layer,
The transmission region of effect and the ratio of entire area), under the conditions of 0.1%~10% aperture opening ratio, it is ensured that optical finger print passes
The normal work of sensor, while the surface color of optical fingerprint sensor being made to be well controlled.This is because ink layer
140 determine the surface color of optical fingerprint sensor, are 0.1%~10% when 143 area of aperture accounts for entire 140 area of ink layer
When, due to aperture 143 be it is equally distributed, the surface color of optical fingerprint sensor is not substantially by the shadow of aperture 143
It rings.
The working principle of optical fingerprint sensor provided by the present embodiment are as follows: human body finger is placed on ink layer 140,
The emergent light of backlight 110 can penetrate pixel substrate 120, simultaneously as having equally distributed multiple open on ink layer 140
Hole 143, and 143 area of aperture can account for the 0.1%~10% of entire 140 area of ink layer, since aperture 143 is uniformly to divide
Cloth, therefore, when the size of each aperture 143 is smaller, eyes of user is subtle to arrive aperture 143, that is to say, that user sees
Be still entire ink layer 140.Meanwhile 143 area of aperture can account for the 0.1%~10% of entire 140 area of ink layer
When, backlight 110 has enough emergent lights to can continue to through ink layer 140, and at the interface of human body finger and ink layer 140
Reflection and transmission occurs, the light of reflection returns to ink layer 140, and penetrates ink layer 140 by aperture 143, is irradiated to picture
On the respective pixel array of plain substrate 120, to carry out photoelectric conversion and signal processing, realizes the acquisition of fingerprint image, improve light
Learn the imaging effect of fingerprint sensor.
In the present embodiment, ink layer 140 is located at entire optical fingerprint sensor outermost layer, at this time can also be in ink layer
Scratch resistant layer (not shown) is set on 140 to cover ink layer 140, even ink layer 140 is covered by the scratch resistant layer, to prevent
Finger directly contacts ink layer 140, and then protects ink layer 140, improves the service life of ink layer 140.
In the present embodiment, ink layer 140 be may is that by link stuff (resin), pigment, filler, auxiliary agent and solvent etc., uniformly
Ground mixing, and through repeat-rolling, a kind of stickiness colloidal fluid of formation.
In the present embodiment, the thickness of ink layer 140 can be 5 μm~20 μm.If 140 thickness of ink layer is too small, such as
When less than 5 μm, then its coloration not enough can be insufficient to allow optical fingerprint sensor appearance to reach corresponding color；If ink layer 140
Thickness is too big, such as when more than 20 μm, one side technique manufacture difficulty is big, on the other hand wastes ink material.
In the present embodiment, ink layer 140 is pasted on 120 upper surface of pixel substrate by glue-line 130, that is to say, that oil
Layer of ink 140 is fixed on 120 upper surface of surface pixels substrate by glue-line 130.Glue-line 130 is whole face structure, the glue of whole face structure
Layer 130 can be formed using method for printing screen.The effect of glue-line 130, which is that enhancing ink layer 140 is bonding with respective surfaces, to be made
With.
In the present embodiment, glue-line 130 with a thickness of 10 μm or less.Usual glue-line 130 gets over Bao Yuehao, 130 thickness of glue-line
Increase scatters when light can be caused to penetrate, to cause the loss of fingerprint imaging quality, therefore, controls 130 thickness of glue-line
At 10 μm or less.In other embodiments, when ink layer 140 itself has enough stickiness, glue-line can also not used
130。
In the present embodiment, optical fingerprint sensor can also include light source, signal reading chip and flexible printed circuit board
Etc. structures.The light source has can be set in the side or side of backlight 110.Backlight 110 may include light conducting plate structure
Picture is equably penetrated so that the light that point source of light (not shown) is found is dispersed into flat light source with backlight bottom reflection structure
Plain substrate 120 improves fingerprint imaging effect.
It has been mentioned hereinbefore that pixel substrate 120 has the pixel array, the pixel array includes multiple array arrangements
Pixel (not marking).Referring to FIG. 2, showing pixel array unit subregion on pixel substrate 120.See from Fig. 2, pixel base
Plate 120 includes bottom plate and pixel array region (not marking) and peripheral circuit region (not marking) on bottom plate.The periphery electricity
Road area may include driving circuit (not shown), the signal reads chip (not shown), the flexible printed circuit board (does not show
Electric connection line (not shown) out) and between them.
It include the pixel array in the pixel array region, the pixel array can specifically include in ranks shape array
Multiple pixels of arrangement, driving line 122 and a plurality of second party of the row and column by a plurality of first direction where the pixel
To data line 123 limited.
In the present embodiment, the plan view shape of each pixel be rectangle (rectangle by a plurality of first direction driving
Line 122 and the data line of a plurality of second direction 123 are limited), also, the side length of the rectangle is more than or equal to 10 μm.The square
It is to match with the corresponding aperture 143 of subsequent setting that the side length of shape, which is more than or equal to 10 μm,.In the state of more ideal, institute
The side length for stating rectangle can choose as more than or equal to 15 μm.
With continued reference to FIG. 2, each pixel includes Signal-controlled switch 1213 and photoelectric conversion unit 1214, and
The pixel further includes transparent region (not marking), and the transparent region can pass through light, and the light of backlight 110 can be via
The transparent region passes through the optical fingerprint sensor.That is, in the entire pixel array region, in addition to driving line
It 122, further include the transparent region other than data line 123, Signal-controlled switch 1213 and photoelectric conversion unit 1214, it is described
Transparent region is used to enable the emergent light of light source 124 through the optical fingerprint sensor.
In the present embodiment, the pixel array can use amorphous silicon film transistor (amorphous Silicon
Thin Film Transistor, a-Si TFT) technique, low-temperature polysilicon film transistor (Low Temperature Poly
Silicon Thin Film Transistor, LTPS TFT) technique or oxide semiconductor thin-film transistor (Oxide
Semiconductor Thin Film Transistor, OS TFT) the semiconductor process techniques production such as technique.
Referring to FIG. 3, showing the ink layer 140 on region shown in Fig. 2, ink layer 140 is arranged including multiple intervals
Cloth first axis the first ink strip 141 and multiple be intervally arranged in second the second axial ink strip 142, the first ink strip
141 and second ink strip 142 surround aperture 143.
In the present embodiment, the first ink strip 141 and the second ink strip 142 are respectively two axially different ink strips, and
And they can be made of corresponding printing technology, they limit corresponding aperture 143 jointly.In other embodiments,
Latticed aperture 143 can be formed using other methods, directly form aperture 143 for example, by using one-step print technique.This hair
The bright forming method to aperture 143 is not construed as limiting.
It should be noted that ink layer 140 is also possible to be located at 120 top of pixel substrate in other embodiments.For example,
When optical fingerprint sensor further includes positioned at the cover sheet of 120 top of pixel substrate, the ink layer 140, which can be located at, to be protected
The upper surface or lower surface of protecting cover plate.When ink layer 140 is located at the upper surface of the cover sheet, due to the protection cap
Therefore plate upper surface, equally can be arranged scratch resistant layer on ink layer 140 and (not show commonly used in the directly contact pressing of finger
Ink layer 140 is covered out), even ink layer 140 is covered by scratch resistant layer, to protect ink layer 140.
Referring to FIG. 4, ink layer 140 shown in Fig. 3 is surrounded one kind of part by dotted line frame 144 when showing the first situation
Enlarged diagram.It can see in figure, the second axial ink strip 142 of the first ink strip 141 vertical second of first axis, because
This, the plan view shape of aperture 143 is rectangle, and two groups of side lengths of the rectangle can be 1 μm~3 μm.
Referring to FIG. 5, ink layer 140 shown in Fig. 3 surrounds the another of part by dotted line frame 144 when showing second situation
Kind enlarged diagram.It can see in figure, the first ink strip 141 ' of first axis and second the second axial ink strip 142 '
It intersects, the first ink strip 141 ' is not mutually perpendicular to second the second axial ink strip 142 ' at this time.Aperture 143 '
Plan view shape is parallelogram, and the distance between parallelogram opposite side is can be 1 μm~3 μm, the parallelogram
Catercorner length can be 1 μm~5 μm.
It should be noted that in other embodiments, in addition to Fig. 4 and two kinds of shapes shown in fig. 5, aperture 143 (or aperture
143 ') it can also be in other shapes.
In the present embodiment, the line width of the first ink strip 141 can be 5 μm~7 μm, the distance of adjacent first ink strip 141
It can be 1 μm~2 μm, i.e. wherein the distance between one group of side length of aperture 143 is 1 μm~2 μm.The line of second ink strip 142
Wide can be 5 μm~7 μm, and the distance of adjacent second ink strip 142 can be 1 μm~2 μm, i.e. another group of side length of aperture 143
The distance between also be 1 μm~2 μm.By controlling the line width of the first ink strip 141 and the second ink strip 142, and control adjacent
The distance of the distance of first ink strip 141 and adjacent second ink strip 142 can guarantee that aperture 143 has ink layer 140 and closes
Suitable aperture opening ratio.Specifically, the present embodiment can be further such that 143 area of aperture accounts for entire ink layer by above-mentioned setting
The 2%~4% of 140 areas, i.e., the aperture opening ratio control at this time is 2%~4%.At this point, each 143 area of aperture is smaller,
Eyes of user is more subtle to aperture 143, meanwhile, in turn ensure the transmitance with higher of ink layer 140.Therefore, no
Only guarantee that the light of backlight 110 can preferably pass through ink layer 140, guarantee the fingerprint imaging of entire optical fingerprint sensor
Effect is more preferable, and keeps the appearance color effect of entire optical fingerprint sensor more preferable.
According to foregoing teachings it is found that in the present embodiment, the corresponding rectangle side length control of the pixel is being more than or equal to 10 μ
M, and be further selected as being more than or equal to 15 μm.And the size of aperture 143 has been subjected to corresponding restriction, such as aperture 143
Plan view shape is rectangle, and two groups of side lengths of the rectangle can be 1 μm~3 μm, in another example the plan view shape of aperture 143 ' is
Parallelogram, the distance between described parallelogram opposite side be can be 1 μm~3 μm, the parallelogram it is diagonal
Line length can be 1 μm~5 μm, then the distance of for example adjacent first ink strip 141 can be 1 μm~2 μm, adjacent second ink
The distance of item 142 may be 1 μm~2 μm.These are limited, so that the area of each aperture 143 (or aperture 143 ') is opposite
It is smaller, and since they are evenly distributed, finally guarantee to be distributed with several apertures 143 above each pixel and (or opens
Hole 143 '), therefore, each pixel can receive the light of the transmission of backlight 110, to ensure that entire ink layer
140 meet corresponding transmitance, ensure that the fingerprint imaging effect of optical fingerprint sensor.Also, since backlight 110 issues
Light be by aperture 143 penetrate ink layer 140, therefore, no matter which kind of color is backlight be, can penetrate ink layer
140。
Further, according to the adjustment of the width of each ink strip and distance, the present embodiment can be realized the adjusting of aperture opening ratio,
And ink layer 140 is set to reach corresponding color-match requirement, while reaching corresponding transmitance demand.
In summary, in optical fingerprint sensor provided by the present embodiment, by setting have multiple apertures 143 (or
Aperture 143 ') ink layer 140, and 143 area of aperture accounts for the 0.1%~10% of 140 area of ink layer, to both overcome face
Colour matching problem, and overcome the problems, such as transmitance, so that the fingerprint imaging effect of optical fingerprint sensor is improved, but also light
It learns fingerprint sensor and does not have to the selection for considering backlight color and appearance color, realize the scheme of random color light source, and optics
The appearance color of fingerprint sensor meets user's requirement.
In optical fingerprint sensor provided by the present embodiment, due to that can overcome the problems, such as that color-match and transmitance are asked
Topic, therefore, ink layer 140 can use random color, either white, black or other colors, can be suitable for institute
Optical fingerprint sensor is stated, corresponding range of choice is increased.
Another embodiment of the present invention provides a kind of electronic product, the electronic product is specially a kind of mobile terminal.It needs
Illustrate, in other embodiments, the electronic product can also be tablet computer, e-book or personal digital assistant etc..
Incorporated by reference to reference Fig. 6 and Fig. 7, Fig. 6 shows 200 front view of mobile terminal, Fig. 7 provided by the present embodiment and shows
The schematic diagram of the section structure that mobile terminal 200 shown in Fig. 6 is obtained along A-A chain-dotted line cutting.It will be seen from figure 6 that mobile
Terminal 200 includes outer cover plate 210 and screen 201, has blind hole 211 on outer cover plate 210.With reference to Fig. 7 it is found that blind hole 211 is located at
The outer surface (not marking) of outer cover plate 210.It may further see from Fig. 7, mobile terminal 200 further includes optical finger print sensing
Device, the optical fingerprint sensor include pixel substrate 220, and outer cover plate 210 is located at 220 top of pixel substrate, pixel substrate 220
Structure and property can refer to previous embodiment corresponding contents.
With continued reference to FIG. 7, the optical fingerprint sensor also has ink layer 222, the structure and property of ink layer 222
Previous embodiment corresponding contents can be referred to.
In the present embodiment, ink layer 222 is located at 220 upper surface of pixel substrate, and the position of ink layer 222 and blind hole 211
Set correspondence.This is because 211 position of blind hole is usually different from the appearance color of 210 other positions of outer cover plate, by described
Ink layer 222 is correspondingly arranged at the lower section of blind hole 211, entire outer cover plate 210 can be made externally to get up solid colour, or make
211 corresponding position of blind hole shows corresponding colour match.
With continued reference to FIG. 7, having glue-line 221 between 220 upper surface of ink layer 222 and pixel substrate, ink layer 222 is logical
It crosses glue-line 221 and is fixed on 220 upper surface of pixel substrate.It should be noted that glue-line can be omitted in other embodiments.
It should be noted that the optical fingerprint sensor can also include backlight (not shown), light in the present embodiment
Source (not shown), signal read the structures such as chip (not shown) and flexible printed circuit board (not shown), can refer to aforementioned implementation
Example corresponding contents.
In the present embodiment, the structure and property of ink layer 222 can refer to previous embodiment corresponding contents, therefore, ink
Layer 222 includes equally distributed multiple aperture (not shown), and structure, property and the production method of the aperture can refer to aforementioned
Embodiment corresponding contents.
In the present embodiment, the area of the aperture accounts for the 0.1%~10% of entire 222 area of ink layer, before can referring to
State embodiment corresponding contents.Specifically, ink layer 222 may include it is multiple be intervally arranged first axis the first ink strip and
Multiple to be intervally arranged in second the second axial ink strip, the aperture is surrounded by the first ink strip and the second ink strip.
It should be noted that ink layer 222 can be above pixel substrate 220 in other embodiments, for example, position
In the inner surface of outer cover plate 210.
It should be noted that blind hole can also be located at the inner surface of outer cover plate in other embodiments.Also, ink at this time
Layer can also be located at the inner surface of outer cover plate, i.e., ink layer is located at blind via bottom surface at this time.
It should be noted that in other embodiments, outer cover plate has a blind hole, ink layer be located at outer cover plate outer surface correspond to it is blind
The position in hole.I.e. at this point, ink layer can be located at the outermost layer of whole mobile phone terminal.If since ink layer is not protected at this time
Therefore the direct contact that shield just will receive finger can be set ink layer and be covered by scratch resistant layer, to protect ink layer.
In the present embodiment, pixel substrate 220 has pixel array, and pixel array has multiple pixels, and each pixel is bowed
Shape being regarded as rectangle, the side length of rectangle is more than or equal to 10 μm, and the plan view shape of the aperture is parallelogram, and described parallel four
The distance between side shape opposite side can be 1 μm~3 μm, and the side length of the parallelogram can be 1 μm~5 μm.According to above-mentioned
The adjustment of the bore size, the present embodiment can be adjusted further so that the perforated area accounts for entire 222 area of ink layer
2%~4%, to further increase corresponding fingerprint imaging effect and color-match effect.
In the present embodiment, the thickness of ink layer 222 can be 5 μm~20 μm, the thickness of glue-line 221 can for 10 μm with
Under, corresponding reason can refer to previous embodiment corresponding contents.
In mobile terminal 200 provided in this embodiment, due to ink layer 222,210 other positions of outer cover plate
Appearance color and outer cover plate 210 to correspond to the appearance color of optical fingerprint sensor position identical or mutually arrange in pairs or groups, and by
There is the equally distributed aperture in ink layer 222, the light of backlight can penetrate ink layer 222, therefore, optical finger print
Sensor need not consider the color of backlight, while the also described aperture can also improve the fingerprint imaging effect of optical fingerprint sensor
Fruit.
Another embodiment of the present invention provides a kind of electronic product, the electronic product is specially a kind of mobile terminal.It needs
Illustrate, in other embodiments, the electronic product can also be tablet computer, e-book or personal digital assistant etc..
Incorporated by reference to reference Fig. 8 and Fig. 9, Fig. 8 shows 300 front view of mobile terminal, Fig. 9 provided by the present embodiment and shows
The schematic diagram of the section structure that mobile terminal 300 shown in Fig. 8 is obtained along B-B chain-dotted line cutting.As can see from Figure 8, mobile
Terminal 300 includes outer cover plate 310 and screen 301, has through-hole on outer cover plate 310 (through-hole has assembled cover sheet 330).
With reference to Fig. 9 it is found that outer surface (do not mark) and inner surface (do not mark) of the through-hole through outer cover plate 310.Into one from Fig. 9
Step can see, and mobile terminal 300 further includes optical fingerprint sensor, and the optical fingerprint sensor includes pixel substrate 320,
Outer cover plate 310 is located at 320 top of pixel substrate, and the structure and property of pixel substrate 320 can be accordingly interior with reference to previous embodiment
Hold.The optical fingerprint sensor further includes cover sheet 330, and cover sheet 330 assembles in the through hole.
With continued reference to FIG. 9, the optical fingerprint sensor also has ink layer 340, the structure and property of ink layer 340
Previous embodiment corresponding contents can be referred to.Ink layer 340 is located at 320 upper surface of pixel substrate, and ink layer 340 with it is described
The position of through-hole is corresponding.This is because the through-hole position usually with the appearance color of 310 other positions of outer cover plate not
Together, it is correspondingly arranged at below the through-hole by the ink layer 340, entire outer cover plate 310 can be made externally to get up face
Color is consistent, or the through-hole corresponding position is made to show corresponding colour match.
Although not shown in the drawing but can also have between ink layer 340 and the upper surface (outer surface) of cover sheet 330
Glue-line, ink layer 340 are fixed on 330 upper surface of cover sheet by the glue-line.
In the present embodiment, since ink layer 340 is located at the upper surface of cover sheet 330, at this point, ink layer 340 is positioned at whole
The outermost layer of a mobile phone terminal, if ink layer 340 will receive the direct contact of finger, therefore, Ke Yishe without being protected
It sets ink layer 340 and (not shown) is covered by corresponding scratch resistant layer, to protect ink layer 340.
It should be noted that the optical fingerprint sensor can also include backlight (not shown), light in the present embodiment
Source, signal read the structures such as chip and flexible printed circuit board, can refer to previous embodiment corresponding contents.
In the present embodiment, the structure and property of ink layer 340 can refer to previous embodiment corresponding contents, therefore, ink
Layer 340 includes equally distributed multiple aperture (not shown), and structure, property and the production method of the aperture can refer to aforementioned
Embodiment corresponding contents.
In the present embodiment, the area of the aperture accounts for the 0.1%~10% of entire 340 area of ink layer, and reason can be with
With reference to previous embodiment corresponding contents.Specifically, ink layer 340 may include multiple is intervally arranged in the first oil of first axis
Ink-stick and it is multiple be intervally arranged in second the second axial ink strip, the aperture is enclosed by the first ink strip and the second ink strip
At.
It should be noted that ink layer 340 can be the inner surface (following table positioned at cover sheet 330 in other embodiments
Face).
In the present embodiment, pixel substrate 320 has pixel array, and pixel array has multiple pixels, and each pixel is bowed
Shape is regarded as rectangle, the side length of the rectangle is more than or equal to 10 μm, and the plan view shape of the aperture is parallelogram, described flat
The distance between row quadrangle opposite side can be 1 μm~3 μm, and the side length of the parallelogram can be 1 μm~5 μm.According to
The adjustment of bore size described above, the present embodiment can be adjusted further so that the perforated area accounts for entire ink layer 340
The 2%~4% of area, to further increase corresponding fingerprint imaging effect and color-match effect.
In the present embodiment, the thickness of ink layer 340 can be 5 μm~30 μm, the thickness of glue-line 331 can for 10 μm with
Under, corresponding reason can refer to previous embodiment corresponding contents.
In mobile terminal 300 provided in this embodiment, due to ink layer 340,310 other positions of outer cover plate
Appearance color and outer cover plate 310 to correspond to the appearance color of optical fingerprint sensor position identical or mutually arrange in pairs or groups, and by
There is the equally distributed aperture in ink layer 340, the light of the backlight can penetrate ink layer 340, therefore, optics
Fingerprint sensor need not consider the color of backlight, while the also described aperture can also improve the fingerprint imaging of optical fingerprint sensor
Effect.
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 (17)
1. a kind of optical fingerprint sensor characterized by comprising
Pixel substrate；
Ink layer is located at the pixel substrate upper surface or is located above the pixel substrate；
The ink layer includes equally distributed multiple apertures, and the perforated area accounts for the 0.1% of the entire ink layer area
~10%, the plan view shape of the aperture is parallelogram, and the distance between described parallelogram opposite side is 1 μm~3 μm.
2. optical fingerprint sensor as described in claim 1, which is characterized in that the optical fingerprint sensor further includes protection
Cover board, the cover sheet are located above the pixel substrate, the ink layer be located at the cover sheet upper surface or
Lower surface.
3. optical fingerprint sensor as claimed in claim 2, which is characterized in that the ink layer is located at the cover sheet
Upper surface, and the ink layer is covered by scratch resistant layer.
4. optical fingerprint sensor as described in claim 1, which is characterized in that the pixel substrate has pixel array, institute
Pixel array is stated with multiple pixels, the plan view shape of each pixel is rectangle, and the side length of the rectangle is more than or equal to 10 μ
m。
5. optical fingerprint sensor as described in claim 1, which is characterized in that have glue between the ink layer and each surface
Layer, the ink layer are fixed on each surface by the glue-line.
6. optical fingerprint sensor as claimed in claim 5, which is characterized in that the ink layer with a thickness of 5 μm~20 μm,
The glue-line with a thickness of 10 μm or less.
7. such as optical fingerprint sensor as claimed in any one of claims 1 to 6, which is characterized in that the perforated area accounts for entirely
The 2%~4% of the ink layer area.
8. such as optical fingerprint sensor as claimed in any one of claims 1 to 6, which is characterized in that the ink layer includes multiple
Be intervally arranged first axis the first ink strip and it is multiple be intervally arranged in second the second axial ink strip, the aperture by
First ink strip and the second ink strip surround.
9. a kind of electronic product characterized by comprising
Optical fingerprint sensor, the optical fingerprint sensor have pixel substrate；
Outer cover plate is located above the pixel substrate, and the outer cover plate has through-hole or blind hole, and the through-hole is through described outer
The upper and lower surfaces of cover board, the blind hole are located at the upper surface or lower surface of the outer cover plate；
Ink layer is located at the pixel substrate upper surface or is located above the pixel substrate；
The ink layer includes equally distributed multiple apertures, and the area of the aperture accounts for the entire ink layer area
0.1%~10%, the plan view shape of the aperture is parallelogram, and the distance between described parallelogram opposite side is 1 μm
~3 μm.
10. electronic product as claimed in claim 9, which is characterized in that the outer cover plate has the through-hole, and the optics refers to
Line sensor further includes the cover sheet above the pixel substrate, and the cover sheet assembles in the through hole, institute
State upper surface or lower surface that ink layer is located at the cover sheet.
11. electronic product as claimed in claim 10, which is characterized in that the ink layer is located at the upper table of the cover sheet
Face, the ink layer are covered by scratch resistant layer.
12. electronic product as claimed in claim 9, which is characterized in that the outer cover plate has the blind hole, the ink layer
The position of the blind hole is corresponded to positioned at the outer cover plate inner surface or the ink layer is located at the outer cover plate outer surface and corresponds to
The position of the blind hole.
13. electronic product as claimed in claim 9, which is characterized in that the pixel substrate has pixel array, the pixel
Array has multiple pixels, and the plan view shape of each pixel is rectangle, and the side length of the rectangle is more than or equal to 10 μm.
14. electronic product as claimed in claim 9, which is characterized in that have glue-line, institute between the ink layer and each surface
It states ink layer and each surface is fixed on by the glue-line.
15. electronic product as claimed in claim 14, which is characterized in that the ink layer with a thickness of 5 μm~20 μm, it is described
Glue-line with a thickness of 10 μm or less.
16. such as the described in any item electronic products of claim 9 to 15, which is characterized in that the perforated area accounts for entire described
The 2%~4% of ink layer area.
17. such as the described in any item electronic products of claim 9 to 15, which is characterized in that the ink layer includes multiple intervals
Be arranged in first axis the first ink strip and it is multiple be intervally arranged in second the second axial ink strip, the aperture is by described
First ink strip and the second ink strip surround.
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| CN201510500285.XA CN105184230B (en) | 2015-08-14 | 2015-08-14 | Optical fingerprint sensor and electronic product |
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| CN201510500285.XA CN105184230B (en) | 2015-08-14 | 2015-08-14 | Optical fingerprint sensor and electronic product |
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| CN105184230A CN105184230A (en) | 2015-12-23 |
| CN105184230B true CN105184230B (en) | 2019-10-22 |
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| CN106951816A (en) | 2016-01-07 | 2017-07-14 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
| CN106951817A (en) | 2016-01-07 | 2017-07-14 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
| CN105550664A (en) * | 2016-01-08 | 2016-05-04 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
| CN107292215A (en) * | 2016-03-31 | 2017-10-24 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
| CN107341433B (en) * | 2016-04-28 | 2023-12-26 | 渭南印象认知技术有限公司 | Concealed fingerprint collector |
| CN107798280B (en) * | 2016-09-07 | 2020-07-03 | 上海箩箕技术有限公司 | Imaging module, forming method thereof and fingerprint identification device |
| CN106250888A (en) * | 2016-09-19 | 2016-12-21 | 汕头超声显示器（二厂）有限公司 | A kind of fingerprint recognition induction apparatus with large area identification region and application thereof |
| CN107886027A (en) * | 2016-09-29 | 2018-04-06 | 上海箩箕技术有限公司 | Optical finger print module and its manufacture method and electronic product |
| CN106503635B (en) * | 2016-10-11 | 2019-06-28 | Oppo广东移动通信有限公司 | Cover board, input module and electronic device for optical finger print identification |
| WO2018107341A1 (en) * | 2016-12-12 | 2018-06-21 | 红蝶科技(深圳)有限公司 | Fingerprint recognition module for implementing backlight by means of light guide layer |
| CN106971171A (en) * | 2017-04-10 | 2017-07-21 | 广东小天才科技有限公司 | A kind of covering plate structure recognized for optical finger print |
| CN108804986A (en) * | 2017-05-03 | 2018-11-13 | 上海箩箕技术有限公司 | Fingerprint imaging module and electronic equipment |
| CN108881522B (en) * | 2017-05-08 | 2024-03-22 | 蓝思科技（长沙）有限公司 | White mobile phone panel carrying capacitive fingerprint module and manufacturing method thereof |
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