CN107330400B - Vein identification device - Google Patents
Vein identification device Download PDFInfo
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- CN107330400B CN107330400B CN201710515616.6A CN201710515616A CN107330400B CN 107330400 B CN107330400 B CN 107330400B CN 201710515616 A CN201710515616 A CN 201710515616A CN 107330400 B CN107330400 B CN 107330400B
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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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Abstract
The invention discloses a vein identification device, which is used for reducing the overall thickness of the vein identification device. The vein identification device comprises a near-infrared light source, an image acquisition unit and an image conversion unit; the near-infrared light source is used for providing light rays of a near-infrared wave band irradiating subcutaneous tissues; the image acquisition unit comprises a plurality of photosensitive pixels arranged in an array, and each photosensitive pixel comprises a photosensitive device and a reading circuit; the light sensing device is used for receiving light reflected by subcutaneous tissues, converting optical signals corresponding to the reflected light into electric signals and outputting the electric signals to the reading circuit; the reading circuit is used for receiving the electric signal and amplifying and converting the electric signal into an electric signal capable of identifying gray scales; the image conversion unit is used for receiving the electric signals with the recognizable gray scales and converting the electric signals with the recognizable gray scales into corresponding vein images.
Description
Technical Field
The invention relates to the technical field of biological identification, in particular to a vein identification device.
Background
With the progress of science and technology, more and more scientific and technical products are widely applied, such as: however, these scientific and technical products not only bring people more convenient lives, but also bring people more potential safety hazards, for example, when a user loses the above mentioned scientific and technical products, the personal data of the user stored inside the products can be opened maliciously, and further the privacy of the user is infringed, therefore, in order to ensure the safety of personal data, most of the scientific and technical products are provided with identity identification devices.
The most widely used of these devices are identity recognition devices that use different biometric features for each individual, such as voice recognition devices, fingerprint recognition devices, face recognition devices, or iris recognition devices used in the early days, and the latest finger vein recognition devices that use finger vein recognition technology; wherein finger vein identification technique indicates that the infrared ray that utilizes the wavelength to be 700 nanometers to 1000 nanometers earlier shines user's finger a period, and the hemoglobin of this finger vein of flowing through this moment can fully absorb the infrared ray, and when later stopping shining, the infrared ray can be dispersed to the hemoglobin of this finger vein, by this, can adopt infrared ray acquisition camera lens to pick up this finger inner vein line image, because everyone's finger inner vein line is certain and different, so can carry out identification by vein line image analysis.
The finger vein identification device in the prior art mainly comprises a near-infrared image capturing unit, an optical lens group, a near-infrared filter and a near-infrared light source, the finger vein identification device in the prior art needs to focus images by the optical lens group, and the optical lens group needs a larger space, so that the overall volume thickness of the finger vein identification device in the prior art cannot be reduced; in addition, the finger vein identification device in the prior art can effectively identify the finger vein in a specific distance range from the finger vein identification device by a user, and part of the finger vein identification device needs an additional component to fix the sensing distance, so that the whole volume and thickness of the finger vein identification device in the prior art are larger.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a vein identification device for reducing the overall thickness of the vein identification device.
The vein identification device provided by the embodiment of the invention comprises a near-infrared light source, an image acquisition unit and an image conversion unit;
the near-infrared light source is used for providing light rays of a near-infrared wave band irradiating subcutaneous tissues;
the image acquisition unit comprises a plurality of photosensitive pixels arranged in an array, and each photosensitive pixel comprises a photosensitive device and a reading circuit;
the photosensitive device is used for receiving light reflected by subcutaneous tissues, converting optical signals corresponding to the reflected light into electric signals and outputting the electric signals to the reading circuit;
the reading circuit is used for receiving the electric signal and amplifying and converting the electric signal into an electric signal capable of identifying gray scales;
the image conversion unit is used for receiving the electric signals with the recognizable gray scales and converting the electric signals with the recognizable gray scales into corresponding vein images.
The vein identification device provided by the embodiment of the invention comprises a near-infrared light source, an image acquisition unit and an image conversion unit, wherein the image acquisition unit comprises a plurality of photosensitive pixels which are arranged in an array, each photosensitive pixel comprises a photosensitive device and a reading circuit, and the photosensitive device is used for receiving light rays reflected by subcutaneous tissues and converting optical signals corresponding to the reflected light rays into electric signals to be output to the reading circuit; the reading circuit is used for receiving the electric signal and amplifying and converting the electric signal into an electric signal capable of identifying gray scales; the image conversion unit is used for receiving the electric signals with the recognizable gray scales and converting the received electric signals with the recognizable gray scales into corresponding vein images; when vein images are acquired, the vein images are acquired through the image acquisition unit and the image conversion unit, in the prior art, the vein images are acquired through the near-infrared image acquisition unit and the optical lens group, and the optical lens group needs a larger space.
Preferably, the near-infrared light source includes a light guide plate and a light emitting source, the light emitting source is configured to emit light in a near-infrared band, and the light emitting source is disposed at a position corresponding to at least one side of the light guide plate.
Preferably, the orthographic projection area of the photosensitive pixel on the light guide plate is overlapped with the light guide plate;
the light guide plate is provided with a plurality of scattering particles, the scattering particles are not overlapped with the overlapping area, and the density of the scattering particles is increased along with the increase of the distance between the scattering particles and the light-emitting source.
Preferably, the density of the scattering particles increases as the distance between the scattering particles and the center point of the light guide plate increases.
Preferably, the near-infrared light source is an organic electroluminescent self-luminous light source or a quantum dot self-luminous light source.
Preferably, the vein identification device further comprises a light increment film arranged on the near-infrared light source, and the light increment film is used for concentrating light emitted by the near-infrared light source to the central area of the near-infrared light source.
Preferably, the area of the near-infrared light source is larger than the sum of the areas of all the photosensitive pixels.
Preferably, the vein identification device further comprises a microlens layer disposed on at least one of the photosensitive pixels, and the microlens layer is used for enhancing the optical signal corresponding to the reflected light.
Preferably, the vein identification device further comprises a near-infrared filter layer arranged on at least one of the photosensitive pixels, and the near-infrared filter layer is used for filtering light rays in non-near-infrared bands.
Preferably, the photosensitive device comprises a substrate base plate, a grid electrode positioned on the substrate base plate, a grid electrode insulating layer positioned on the grid electrode, a semiconductor active layer positioned on the grid electrode insulating layer, and a source electrode, a drain electrode and a quantum dot material layer positioned on the semiconductor active layer; wherein:
the quantum dot material layer is in contact with the semiconductor active layer and used for absorbing light of a near infrared band, and the energy level of the quantum dot material layer corresponds to that of the semiconductor active layer.
Drawings
Fig. 1 is a schematic plan view of a vein identification device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along AA1 of FIG. 1;
fig. 3 is a schematic structural diagram of a near-infrared light source according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another near-infrared light source according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of another vein identification device according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of another vein identification device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a photosensitive device according to an embodiment of the present invention;
fig. 8 is a schematic plan view of a vein identification device according to an embodiment of the present invention;
fig. 9A and 9B are schematic diagrams of different illumination receiving areas of the photosensitive device when the vein identification apparatus provided by the embodiment of the invention is in operation.
Detailed Description
The embodiment of the invention provides a vein identification device, which is used for reducing the overall thickness of the vein identification device.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The vein identification device provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
The sizes and shapes of the regions of the various components in the drawings are not to scale and are intended to be illustrative of the invention.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a vein identification device, which includes a near-infrared light source 11, an image obtaining unit 12, and an image conversion unit 13, and fig. 2 is a schematic cross-sectional view along the AA1 direction in fig. 1;
the near-infrared light source 11 is used for providing light rays in a near-infrared band irradiating subcutaneous tissues;
the image capturing unit 12 includes a plurality of photosensitive pixels 120 arranged in an array, each photosensitive pixel 120 including a photosensitive device 121 and a reading circuit 122;
the light sensing device 121 is configured to receive light reflected by subcutaneous tissue, convert an optical signal corresponding to the reflected light into an electrical signal, and output the electrical signal to the reading circuit 122;
the reading circuit 122 is configured to receive the electrical signal and amplify and convert the electrical signal into an electrical signal capable of identifying gray scales;
the image conversion unit 13 is configured to receive an electrical signal with an identifiable gray scale and convert the electrical signal with the identifiable gray scale into a corresponding vein image.
The vein identification device provided by the specific embodiment of the invention comprises a near-infrared light source, an image acquisition unit and an image conversion unit, wherein the image acquisition unit comprises a plurality of photosensitive pixels which are arranged in an array, each photosensitive pixel comprises a photosensitive device and a reading circuit, and the photosensitive device is used for receiving light rays reflected by subcutaneous tissues and converting optical signals corresponding to the reflected light rays into electric signals to be output to the reading circuit; the reading circuit is used for receiving the electric signal and amplifying and converting the electric signal into an electric signal capable of identifying gray scales; the image conversion unit is used for receiving the electric signals with the recognizable gray scales and converting the received electric signals with the recognizable gray scales into corresponding vein images; when vein images are acquired, the vein images are acquired through the image acquisition unit and the image conversion unit, in the prior art, the vein images are acquired through the near-infrared image acquisition unit and the optical lens group, and the optical lens group needs a large space.
The near infrared light source in the specific embodiment of the invention can be a backlight source or a self-luminous light source; when the near-infrared light source in the embodiment of the present invention is a self-luminous light source, preferably, the near-infrared light source in the embodiment of the present invention is an organic electroluminescent self-luminous light source, or a quantum dot self-luminous light source, and it is simpler and more convenient to select the organic electroluminescent self-luminous light source or the quantum dot self-luminous light source in practical application; of course, in practical application, the near-infrared light source may be other types of self-emitting light sources, as long as the emitted light is ensured to be in the near-infrared band.
When the near-infrared light source in the embodiment of the present invention is a backlight, preferably, as shown in fig. 3, the near-infrared light source in the embodiment of the present invention includes a light guide plate 31 and a light emitting source 32, where the light emitting source 32 is configured to emit light in a near-infrared band, the light emitting source 32 is disposed at a position corresponding to at least one side edge of the light guide plate 31, and fig. 3 only shows that the light emitting source 32 is disposed at a position corresponding to an upper side edge of the light guide plate 31, and of course, in practical applications, the light emitting source 32 may also be disposed at a position corresponding to other side edges of the light guide plate 31, such: may be disposed at a position corresponding to the left side edge of the light guide plate 31.
Specifically, as shown in fig. 4, the light sensing pixels according to the embodiment of the present invention have an overlapping area between the light guide plate 31 and the orthographic projection area 41 of the light sensing pixels on the light guide plate 31; since the light guide plate 31 is provided with the scattering particles 42, the scattering particles 42 do not overlap the overlapping region, and the density of the scattering particles 42 increases as the distance between the scattering particles 42 and the light source 32 increases, the density of the scattering particles at a distance from the light source 32 is relatively high, and thus, the light can be well scattered by the light guide plate at a region farther from the light source 32. In a specific implementation, the scattering particles 42 may have a shape of a circle, a semicircle, a triangle, or the like, the scattering particles 42 may scatter light irradiated thereto, and the refractive index of the scattering particles 42 is different from the refractive index of the light guide plate 31.
Specifically, as shown in fig. 4, the density of the scattering particles 42 according to the embodiment of the present invention increases with the distance between the scattering particles 42 and the central point of the light guide plate 31, so that the light output amount is larger at the outer circle of the light guide plate 31, and since the light received by the light sensing device is the light reflected from the subcutaneous tissue, in order to reduce the strong reflected light of the subcutaneous tissue, the angle of the oblique incidence needs to be selected, and the scattering particles 42 are disposed so as to avoid the direct incidence from the right below the light sensing device, and thus the incident light is the oblique incidence.
Further, the vein identification device according to the embodiment of the present invention further includes a light increment film disposed on the near-infrared light source, and the light increment film is configured to concentrate light emitted by the near-infrared light source to a central region of the near-infrared light source, so that light in a near-infrared band can be better irradiated to a central subcutaneous tissue.
Preferably, the area of the near-infrared light source in the embodiment of the present invention is larger than the sum of the areas of all the photosensitive pixels, so that the near-infrared light source in the embodiment of the present invention can well adjust the uniformity of the light emitted by the near-infrared light source.
Specifically, as shown in fig. 5, the vein identification device in the embodiment of the present invention further includes a microlens layer 51 disposed on at least one photosensitive pixel, the microlens layer 51 is used to enhance the optical signal corresponding to the reflected light, and fig. 5 only shows a preferred embodiment in which a microlens layer is disposed on each photosensitive pixel; in addition, the arrangement of the microlens layer 51 can also prevent oblique stray light from directly entering the photosensitive device, and in specific implementation, the thickness of the microlens layer 51 can be made thinner (<100um), so that the overall thickness of the vein identification device is not affected.
Specifically, as shown in fig. 6, the vein identification device in the embodiment of the present invention further includes a near-infrared filter layer 61 disposed on at least one photosensitive pixel, where the near-infrared filter layer 61 is used to filter light in a non-near-infrared band, and fig. 6 only shows an optimal implementation manner in which a near-infrared filter layer is disposed on each photosensitive pixel, where the near-infrared filter layer 61 can be disposed to well avoid interference caused by light in the non-near-infrared band, and in the implementation, the near-infrared filter layer may adopt a filter layer structure commonly used in the prior art, and such a similar layer has a thin thickness, which does not affect the overall thickness of the vein identification device.
Specifically, as shown in fig. 7, the photosensitive device in the embodiment of the present invention includes a substrate 70, a gate electrode 71 on the substrate 70, a gate insulating layer 72 on the gate electrode 71, a semiconductor active layer 73 on the gate insulating layer 72, a source electrode 74, a drain electrode 75, and a quantum dot material layer 76 on the semiconductor active layer 73, and a passivation layer 77 on the source electrode 74, the drain electrode 75, and the quantum dot material layer 76; wherein: the quantum dot material layer 76 is in contact with the semiconductor active layer 73 for absorbing light of a near infrared band, and the energy level of the quantum dot material layer 76 corresponds to the energy level of the semiconductor active layer 73. Thus, the quantum dot material layer 76 and the semiconductor active layer 73 are used in combination, so that the embodiment of the invention can well convert the optical signal corresponding to the received light into the electrical signal.
In specific implementation, the substrate 70 may be a transparent glass substrate, the gate electrode 71 may be made of a metal material such as molybdenum (Mo), aluminum (Al), or silver (Ag), the gate insulating layer 72 and the passivation layer 77 may be made of an insulating material such as silicon oxide or silicon nitride, the source electrode 74 and the drain electrode 75 may be made of a metal material such as molybdenum (Mo), aluminum (Al), or silver (Ag), the quantum dot material layer 76 may be made of PbS, and the semiconductor active layer 73 may be made of Indium Gallium Zinc Oxide (IGZO).
The operation of the vein identification device according to the present invention will be briefly described.
As shown in fig. 8, the vein identification apparatus according to the embodiment of the invention includes an image obtaining unit 12, a signal circuit 81, an image conversion unit 13 and a circuit binding region 83, wherein the signal circuit 81 is configured to control the operation of the reading circuit 122, and the image conversion unit 13 is configured to convert an electrical signal of an identifiable gray scale corresponding to the reading circuit 122 into a gray scale signal and provide the gray scale signal to a reading IC in the image conversion unit 13 for subsequent processing, and the gray scale signal is converted into a vein image signal by the reading IC and provided to a backend system.
In practical implementation, in order to reduce the strong reflected light of the subcutaneous tissue and to avoid the reflected light from directly entering from the right below the photosensitive device, each photosensitive pixel 120 in the embodiment of the invention includes a transparent region in addition to the photosensitive device 121 and the readout circuit 122, so that the incident light can enter obliquely.
As shown in fig. 9A and 9B, when the vein identification apparatus according to the embodiment of the present invention is in operation, the near-infrared light source irradiates light to the photosensitive device in each photosensitive pixel in two stages, first, the near-infrared light source controls the position corresponding to the first region 91 of the photosensitive device 121 to emit light, and then the reading circuit 122 receives the electrical signal at the position corresponding to the second region 92 of the photosensitive device 121 and amplifies and converts the electrical signal into an electrical signal capable of identifying gray scales; then, the near-infrared light source controls the position corresponding to the second region 92 of the light sensing device 121 to emit light, at this time, the reading circuit 122 receives the electrical signal at the position corresponding to the first region 91 of the light sensing device 121, amplifies and converts the electrical signal into an electrical signal capable of identifying gray scale, the reading circuit 122 superposes the electrical signals capable of identifying gray scale converted twice, and the superposed electrical signal is output to the image conversion unit. In fig. 9A and 9B, the white filled region indicates a light-emitting region, and the black filled region indicates a non-light-emitting region (i.e., a region read by the reading circuit 122). In a specific implementation, the partition manner of the first area and the second area is not limited to the manner of fig. 9A and 9B, so that the optimal light source position can be provided for the area adjustment.
In summary, the present invention provides a vein identification device, including a near-infrared light source, an image obtaining unit and an image conversion unit, where the image obtaining unit includes a plurality of photosensitive pixels arranged in an array, each photosensitive pixel includes a photosensitive device and a reading circuit, and the photosensitive device is configured to receive light reflected by subcutaneous tissue, convert an optical signal corresponding to the reflected light into an electrical signal, and output the electrical signal to the reading circuit; the reading circuit is used for receiving the electric signal and amplifying and converting the electric signal into an electric signal capable of identifying gray scales; the image conversion unit is used for receiving the electric signals with the recognizable gray scales and converting the electric signals with the recognizable gray scales into corresponding vein images. When vein images are acquired, the vein images are acquired through the image acquisition unit and the image conversion unit, in the prior art, the vein images are acquired through the near-infrared image acquisition unit and the optical lens group, and the optical lens group needs a large space.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A vein identification device is characterized by comprising a near-infrared light source, an image acquisition unit and an image conversion unit;
the near-infrared light source is used for providing light rays of a near-infrared wave band irradiating subcutaneous tissues;
the image acquisition unit comprises a plurality of photosensitive pixels arranged in an array, and each photosensitive pixel comprises a photosensitive device and a reading circuit;
the photosensitive device is used for receiving light reflected by subcutaneous tissues, converting optical signals corresponding to the reflected light into electric signals and outputting the electric signals to the reading circuit;
the reading circuit is used for receiving the electric signal and amplifying and converting the electric signal into an electric signal capable of identifying gray scales;
the image conversion unit is used for receiving the electric signals with the recognizable gray scales and converting the electric signals with the recognizable gray scales into corresponding vein images;
the photosensitive device comprises a substrate, a grid electrode positioned on the substrate, a grid electrode insulating layer positioned on the grid electrode, a semiconductor active layer positioned on the grid electrode insulating layer, a source electrode positioned on the semiconductor active layer, a drain electrode and a quantum dot material layer; wherein:
the quantum dot material layer is in contact with the semiconductor active layer and used for absorbing light of a near infrared band, and the energy level of the quantum dot material layer corresponds to that of the semiconductor active layer.
2. The vein identification device according to claim 1, wherein the near infrared light source comprises a light guide plate and a light emitting source, the light emitting source is configured to emit light in a near infrared band, and the light emitting source is disposed at a position corresponding to at least one side of the light guide plate.
3. The vein identification device according to claim 2, wherein there is an overlapping area between the orthographic projection area of the photosensitive pixels on the light guide plate and the light guide plate;
the light guide plate is provided with a plurality of scattering particles, the scattering particles are not overlapped with the overlapping area, and the density of the scattering particles is increased along with the increase of the distance between the scattering particles and the light-emitting source.
4. The vein identification device according to claim 3, wherein the density of the scattering particles increases as the distance of the scattering particles from the center point of the light guide plate increases.
5. The vein identification device according to claim 1, wherein the near infrared light source is an organic electroluminescent self-luminescent light source, or a quantum dot self-luminescent light source.
6. The vein identification device according to any one of claims 1-5, further comprising a light enhancement film disposed on the near-infrared light source, the light enhancement film configured to concentrate light emitted by the near-infrared light source toward a central region of the near-infrared light source.
7. The vein identification device according to claim 6, wherein the area of the near infrared light source is larger than the sum of the areas of all the photosensitive pixels.
8. The vein identification device according to claim 1, further comprising a microlens layer disposed on at least one of the photosensitive pixels, the microlens layer being configured to enhance an optical signal corresponding to the reflected light.
9. The vein identification device according to claim 1 or 8, further comprising a near infrared filter layer disposed on at least one of the photosensitive pixels, the near infrared filter layer being configured to filter light in a non-near infrared band.
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| CN201710515616.6A CN107330400B (en) | 2017-06-29 | 2017-06-29 | Vein identification device |
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| CN201710515616.6A CN107330400B (en) | 2017-06-29 | 2017-06-29 | Vein identification device |
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| CN107330400B true CN107330400B (en) | 2020-05-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108742529B (en) * | 2018-05-29 | 2022-05-17 | 苏州佳世达电通有限公司 | Film for auxiliary detection and vein identification system |
| CN110298261B (en) * | 2019-06-06 | 2021-06-01 | Oppo广东移动通信有限公司 | Vein identification method and related product |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101655639A (en) * | 2009-09-29 | 2010-02-24 | 上海交通大学 | Side light type LCD backlight module comprising non-uniform linear light source |
| CN101711677A (en) * | 2008-09-30 | 2010-05-26 | 索尼株式会社 | Vein imaging apparatus and thumbnail image creation method |
| CN101923065A (en) * | 2010-07-13 | 2010-12-22 | 中国科学院苏州纳米技术与纳米仿生研究所 | Field effect transistor chiral sensor and manufacture method thereof |
| CN102147078A (en) * | 2010-02-09 | 2011-08-10 | 鸿富锦精密工业（深圳）有限公司 | Back light module and light guide plate thereof |
| CN102658795A (en) * | 2010-12-10 | 2012-09-12 | 法国马涅蒂·马雷利公司 | Improved back lighting device |
| CN104463107A (en) * | 2014-11-21 | 2015-03-25 | 上海箩箕技术有限公司 | Backlight plate, optical imaging device and identification equipment |
| CN105870169A (en) * | 2016-04-18 | 2016-08-17 | 京东方科技集团股份有限公司 | Thin-film transistor and manufacturing method thereof, array substrate and display device |
| CN106597747A (en) * | 2017-01-03 | 2017-04-26 | 京东方科技集团股份有限公司 | Backlight source, display substrate and display apparatus |
| CN106597598A (en) * | 2016-12-31 | 2017-04-26 | 盐城三鼎电子科技有限公司 | Novel backlight source light guide plate |
-
2017
- 2017-06-29 CN CN201710515616.6A patent/CN107330400B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101711677A (en) * | 2008-09-30 | 2010-05-26 | 索尼株式会社 | Vein imaging apparatus and thumbnail image creation method |
| CN101655639A (en) * | 2009-09-29 | 2010-02-24 | 上海交通大学 | Side light type LCD backlight module comprising non-uniform linear light source |
| CN102147078A (en) * | 2010-02-09 | 2011-08-10 | 鸿富锦精密工业（深圳）有限公司 | Back light module and light guide plate thereof |
| CN101923065A (en) * | 2010-07-13 | 2010-12-22 | 中国科学院苏州纳米技术与纳米仿生研究所 | Field effect transistor chiral sensor and manufacture method thereof |
| CN102658795A (en) * | 2010-12-10 | 2012-09-12 | 法国马涅蒂·马雷利公司 | Improved back lighting device |
| CN104463107A (en) * | 2014-11-21 | 2015-03-25 | 上海箩箕技术有限公司 | Backlight plate, optical imaging device and identification equipment |
| CN105870169A (en) * | 2016-04-18 | 2016-08-17 | 京东方科技集团股份有限公司 | Thin-film transistor and manufacturing method thereof, array substrate and display device |
| CN106597598A (en) * | 2016-12-31 | 2017-04-26 | 盐城三鼎电子科技有限公司 | Novel backlight source light guide plate |
| CN106597747A (en) * | 2017-01-03 | 2017-04-26 | 京东方科技集团股份有限公司 | Backlight source, display substrate and display apparatus |
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