CN103729093A - Image acquisition device and optical displacement estimation device - Google Patents
Image acquisition device and optical displacement estimation device Download PDFInfo
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- CN103729093A CN103729093A CN201210392939.8A CN201210392939A CN103729093A CN 103729093 A CN103729093 A CN 103729093A CN 201210392939 A CN201210392939 A CN 201210392939A CN 103729093 A CN103729093 A CN 103729093A
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Abstract
The invention discloses an image acquisition device. The image acquisition device comprises a light source and a sensor. According to the light source, incident light does not pass through media except air, enters a target object directly and exits from the target object, so that transmitting light is generated. The sensor is used for acquiring the image of the target object according to the transmitting light.
Description
Technical field
The present invention relates to a kind of image capture unit and use the optical displacement estimating apparatus of this image capture unit, particularly, about a kind of incident light that light source is produced is not by the medium outside air, directly injects the image capture unit of an object and use the optical displacement estimating apparatus of this image capture unit.
Background technology
Along with technology is constantly progressive, used the contactor control device of machinery or resistance, electric capacity by optical touch control apparatus, to be replaced gradually in the past.This class optical touch control apparatus can be considered a kind of optical displacement estimating apparatus, because be that the sensitive surface of judgment means for example, with the relative motion of an object (finger).
This class optical displacement estimating apparatus conventionally can have an image capture unit and capture the picture frame of object at the image of different time generation, and produces according to this displacement estimation of object.Figure 1A has illustrated the sectional view of optical displacement estimating apparatus 100, and it can be considered the image capture unit in optical displacement estimating apparatus 100.And Figure 1B has illustrated the circuit block diagram of optical displacement estimating apparatus 100 internal control displacement estimation actions.In Figure 1A, optical displacement estimating apparatus 100 has comprised a reflecting element 101, light source 103, camera lens 105, sensor 107 and a sensitive surface 109.The incident light of light source 103 can be incident to the finger F in sensitive surface 109 and produce image after reflecting element 101 reflections.Sensor 107 can be by the picture frame of different time points in camera lens 105 pick-up images.Processing unit 113 can calculate according to the picture frame of different time points the displacement action of finger F.In addition the also data access of control store device 115 and the action of light source control unit 117 of processing unit 113.
But in the framework of Figure 1A, owing to needing the optical element of reflecting element 101 and camera lens 105 and so on, therefore the volume of entirety cannot reduce.In addition, because optical signalling optical path is longer, and through processing such as reflecting, penetrate, therefore can have influence on the imaging of fingerprint, cause its contrast not obvious.And such framework also easily makes the image of finger be subject to the interference of surround lighting.
Summary of the invention
Therefore, an object of the present invention is openly a kind ofly to there is the image capture unit of smaller size smaller and use the optical displacement estimating apparatus of this image capture unit.
Another object of the present invention is openly a kind ofly to reduce the image capture unit of ambient light interference and use the optical displacement estimating apparatus of this image capture unit.
Another object of the present invention is open a kind of more clearly image capture unit and use the optical displacement estimating apparatus of this image capture unit of object image that makes.
One embodiment of the present of invention disclose a kind of image capture unit, comprise: light source, and make incident light not by the medium outside air, directly inject object so that this incident light penetrates and generation penetrating light from this object; And sensor, in order to according to this penetrating light to capture the image of this object.
An alternative embodiment of the invention discloses a kind of optical displacement estimating apparatus, comprises: light source, and make incident light not by the medium outside air, directly inject object so that this incident light penetrates and generation penetrating light from this object; Sensor, in order to according to this penetrating light to capture the image of this object; And processor, in order to this image according to different time points, this object is carried out to displacement estimation.
Because light source is directly injected object by incident light, therefore can there is thinner structure, and cost is lower, easily assembling is produced.And, because directly injecting object, light by object, enters sensor again, and therefore optical signalling is stronger, and fingerprint contrast is obvious and can reduce the interference of surround lighting to finger image.In addition, due to the setting of optical gate and film, lateral light can be stopped, the interference of surround lighting can be more reduced.
Accompanying drawing explanation
Figure 1A and Figure 1B have illustrated the image capture unit in the optical displacement estimating apparatus of known techniques.
Fig. 2 to Fig. 5 has illustrated the image capture unit of different embodiment according to the subject invention.
Fig. 6 has illustrated the effect that image capture unit presents according to an embodiment of the invention.
Wherein, description of reference numerals is as follows:
100 optical displacement estimating apparatus
101 reflecting elements
103 light sources
105 camera lenses
107 sensors
109 sensitive surface
113 processing units
115 memory storages
117 light source control units
200,300,400,500 image capture units
201,301,401,501 light sources
203,305,405,505 sensors
205 protective materials
303,403 optics barrier element
306 receiving planes
307,407 lids
409 camera lenses
503 films
Embodiment
In the middle of instructions and claim above, used some vocabulary to censure specific element.Person with usual knowledge in their respective areas should understand, and hardware manufacturer may be called same element with different nouns.This instructions and claim above are not used as distinguishing the mode of element with the difference of title, but the difference in function is used as the criterion of distinguishing with element.In the whole text, in the middle of instructions and claim above, be an open term mentioned " comprising ", therefore should be construed to " comprise but be not limited to ".Fig. 2 to Fig. 5 has illustrated according to image capture unit of the present invention.In Fig. 2, image capture unit 200 comprises a light source 201 and a sensor 203.Sensor 203 around can protective material 205 be protected as epoxy resin (epoxy) etc., but does not limit.Light source 201 makes incident light EL by the medium outside air, directly injects an object (be finger F in this embodiment, but also other object) and produces penetrating light TL so that light penetrates finger F.Sensor 203 captures an image of the finger F that penetrating light TL forms.In this embodiment, one deck can be set up again in sensor 203 surfaces does not affect the material of light incident, in order to protect sensor 203 to produce damage because of the direct contact of finger F.
Framework shown in Fig. 2 can be added other element, makes imaging effect better.For instance, in the embodiment shown in fig. 3, image capture unit 300, except light source 301, sensor 305, can more provide an optics barrier element 303, makes penetrating light TL first through after optics barrier element 303, then is received by sensor 305.In addition, image capture unit 300 can comprise a lid 307, but its material glass or plastics are protected sensor 305.Optics barrier element 303, in order to block the light of the outer at least a portion of penetrating light TL incident direction, makes sensor 305 can avoid the interference of surround lighting.For instance, but 303 1 optical gates of optics barrier element, and it can stop lateral light SL, that is to say and only allows penetrating light TL only can be incident to sensor 305 with the direction of the receiving plane of vertical reference 305 306.The pore size of optical gate can change with the size of sensor or design requirement are different, but palpulus is the size of a pixel.
Fig. 4 has illustrated image capture unit 400 according to another embodiment of the invention, and the framework of image capture unit 400 is similar with image capture unit 300, has also comprised light source 401, optics barrier element 403, sensor 405 and lid 407.Image capture unit 400 further comprises a camera lens 409.Make penetrating light TL being incident to before sensor 405, be able to give suitable refraction or transmission by camera lens 409, make the quality of image better.
Optics barrier element in Fig. 3 and Fig. 4 can be replaced by film, and Fig. 5 has illustrated such framework.As shown in Figure 5, image capture unit 500 has comprised a light source 501, film 503 and a sensor 505.Light source 501 is also that incident light EL is directly injected to finger F, makes it produce penetrating light TL and by sensor 505, be received after film 503.Film 503 can be the materials such as epoxy resin, glass, glass fibre or optical fiber, and end is seen the characteristic of required refraction or obstruct light and determined.If while thering is the framework of film shown in use Fig. 5, must consider the collocation of the refractive index of film material and the refractive index of finger skin.For instance, the refractive index of epoxy resin is 1.4 ~ 1.5, and the refractive index of glass is 1.2 ~ 1.8, the refractive index of glass fibre is 1.5.Finger skin is owing to having water, fat and protein, and therefore its refractive index, about 1.4 ~ 1.5, therefore must be considered the composition of the refractive index of different materials.In addition, except considering refractive index, to still need and consider incident angle and the reflection angle of light, and the parameter such as film thickness, sender unit cap body thickness.Due to these account forms under different materials and design requirement neither with and be to know this skill person to know, therefore here repeat no more.In addition, in the embodiment of Fig. 2 to Fig. 5, the position of light source makes incident light EL contrary with the direct of travel of penetrating light TL, but the position limitation that does not represent light source is at this.
According to aforesaid embodiment, because light source is directly injected object by incident light, therefore can there is thinner structure, and cost is lower, easily assembling is produced.And, because directly injecting object, light by object, enters sensor again, and therefore optical signalling is stronger, and fingerprint contrast is obvious and can reduce the interference of surround lighting to finger image.In addition, due to the setting of optical gate and film, lateral light can be stopped, the interference of surround lighting can be more reduced.Fig. 6 has illustrated the effect that image capture unit presents according to an embodiment of the invention.The longitudinal axis in Fig. 6 represents light intensity, and transverse axis has represented zones of different, and crest P has represented fingerprint protuberance, and trough G has represented fingerprint recess.As seen from Figure 6, crest P and trough G have quite significantly difference, represent that fingerprint protuberance and recess contrast are clear and definite.If want, calculate the light intensity of fingerprint protuberance and recess, can be respectively for the protuberance region different with recess, consider the different-thickness of the element that uses, and irradiation intensity etc. in addition integration obtain.This class technology is due to quite variation, and commonly at fingerprint, debates in the correlation techniques such as knowledge, therefore do not repeat them here.
Aforesaid image capture unit can be used the circuit structure shown in Figure 1B, and the image that now sensor 107 captures can be delivered to processing unit 113, and processing unit 113 just can carry out displacement estimation according to the image of different time.But do not limit, can only be used in the circuit structure shown in Figure 1B.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (18)
1. an image capture unit, comprises:
Light source, makes incident light not by the medium outside air, directly injects object so that this incident light penetrates and generation penetrating light from this object; And
Sensor, in order to according to this penetrating light to capture the image of this object.
2. image capture unit as claimed in claim 1, wherein this sensor directly receives this penetrating light.
3. image capture unit as claimed in claim 1, further comprises that light barrier element position is between this sensor and this object, in order to intercept the light of at least one direction but make this sensor still can receive this penetrating light.
4. image capture unit as claimed in claim 3, wherein this light barrier element is optical gate.
5. image capture unit as claimed in claim 3, further comprises:
Camera lens, is situated between between this light barrier element and this sensor.
6. image capture unit as claimed in claim 3, wherein this light barrier element makes this penetrating light only can be incident to this sensor with the direction of the receiving plane of vertical this sensor.
7. image capture unit as claimed in claim 1, further comprises that film position is between this sensor and this object, in order to reflect this penetrating light to this sensor.
8. image capture unit as claimed in claim 7, wherein this film is epoxy resin film, glass film, glass fibre film or optical fibre thin film.
9. image capture unit as claimed in claim 1, the direct of travel of this penetrating light that wherein this incident light receives with this sensor is contrary.
10. an optical displacement estimating apparatus, comprises:
Light source, makes incident light not by the medium outside air, directly injects object so that this incident light penetrates and generation penetrating light from this object;
Sensor, in order to according to this penetrating light to capture the image of this object; And
Processor, carries out displacement estimation in order to this image according to different time points to this object.
11. optical displacement estimating apparatus as claimed in claim 10, wherein this sensor directly receives this penetrating light.
12. optical displacement estimating apparatus as claimed in claim 10, further comprise that light barrier element position is between this sensor and this object, in order to intercept the light of at least one direction but make this sensor still can receive this penetrating light.
13. optical displacement estimating apparatus as claimed in claim 12, wherein this light barrier element is optical gate.
14. optical displacement estimating apparatus as claimed in claim 12, further comprise:
Camera lens, between this light barrier element and this sensor.
15. optical displacement estimating apparatus as claimed in claim 12, wherein this light barrier element makes this penetrating light only can be incident to this sensor with the direction of the receiving plane of vertical this sensor.
16. optical displacement estimating apparatus as claimed in claim 10, further comprise that film position is between this sensor and this object, in order to reflect this penetrating light to this sensor.
17. optical displacement estimating apparatus as claimed in claim 16, wherein this film is epoxy resin film, glass film, glass fibre film or optical fibre thin film.
18. optical displacement estimating apparatus as claimed in claim 10, the direct of travel of this penetrating light that wherein this incident light receives with this sensor is contrary.
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| CN201210392939.8A CN103729093A (en) | 2012-10-16 | 2012-10-16 | Image acquisition device and optical displacement estimation device |
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| CN106599768A (en) * | 2015-10-14 | 2017-04-26 | 联咏科技股份有限公司 | Optical device |
| CN106778460A (en) * | 2015-11-22 | 2017-05-31 | 金佶科技股份有限公司 | Fingerprint sensing module |
| CN106874828A (en) * | 2015-12-11 | 2017-06-20 | 金佶科技股份有限公司 | Fingerprint sensing module |
| CN106897699A (en) * | 2017-02-24 | 2017-06-27 | 京东方科技集团股份有限公司 | A kind of fingerprint recognition device, OLED display |
| CN108241830A (en) * | 2016-12-23 | 2018-07-03 | 创智能科技股份有限公司 | Biometric recognition device.It |
| CN108241826A (en) * | 2016-12-23 | 2018-07-03 | 创智能科技股份有限公司 | Biometric recognition device.It |
| WO2018153078A1 (en) * | 2017-02-27 | 2018-08-30 | 京东方科技集团股份有限公司 | Optical fingerprint recognition assembly, display panel, and display apparatus |
| WO2018153070A1 (en) * | 2017-02-23 | 2018-08-30 | 京东方科技集团股份有限公司 | Optical fingerprint recognition apparatus and display panel |
| CN113066137A (en) * | 2019-12-31 | 2021-07-02 | 宏碁股份有限公司 | Electronic system with material capturing function and input device |
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| CN111353457A (en) * | 2015-10-14 | 2020-06-30 | 联咏科技股份有限公司 | Optical device |
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| CN113066137A (en) * | 2019-12-31 | 2021-07-02 | 宏碁股份有限公司 | Electronic system with material capturing function and input device |
| CN113066137B (en) * | 2019-12-31 | 2023-06-30 | 宏碁股份有限公司 | Electronic system with authored material capturing function and input device |
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Application publication date: 20140416 |