CN111104939A - Electronic device - Google Patents
Electronic device Download PDFInfo
- Publication number
- CN111104939A CN111104939A CN201911341938.9A CN201911341938A CN111104939A CN 111104939 A CN111104939 A CN 111104939A CN 201911341938 A CN201911341938 A CN 201911341938A CN 111104939 A CN111104939 A CN 111104939A
- Authority
- CN
- China
- Prior art keywords
- light
- electronic device
- area
- light emitting
- sensing module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005286 illumination Methods 0.000 claims abstract description 15
- 239000003086 colorant Substances 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/145—Illumination specially adapted for pattern recognition, e.g. using gratings
-
- 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
-
- 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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Optics & Photonics (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention provides an electronic device for sensing a fingerprint image of a finger, comprising a light-emitting element, a sensing module and a controller. The light-emitting element comprises a plurality of light-emitting pixels which are arranged in an array, have a fingerprint sensing area and are used for providing irradiation light beams to the finger. The sensing module is configured below the fingerprint sensing area and used for receiving the irradiation light beam which reaches the sensing module after being reflected by the finger so as to generate a fingerprint image. The controller is electrically connected to the light-emitting element to control the light-emitting element to emit light, wherein the fingerprint sensing area is at least divided into a first area and a second area from the center to the periphery of the fingerprint sensing area. When the light-emitting element provides illumination light beams to illuminate the finger, the controller controls the light color emitted by the light-emitting pixels in the first area and the light color emitted by the light-emitting pixels in the second area, so that the quantum efficiency of the sensing module for the light color emitted by the light-emitting pixels in the first area is smaller than the quantum efficiency of the sensing module for the light color emitted by the light-emitting pixels in the second area.
Description
Technical Field
The present invention relates to an electronic device, and more particularly, to an electronic device capable of sensing a fingerprint.
Background
With the continuous evolution and improvement of electronic technology and manufacturing technology, information electronic products have been developed. Electronic products such as computers, mobile phones, cameras and the like are indispensable tools for modern people. In addition, in the current smart mobile devices, it is also necessary to integrate a fingerprint sensing device to enhance the safety of the smart mobile device and support more smart functions.
Currently, a user can press a finger on a display of a mobile phone for fingerprint sensing. However, in the sensing process, the light intensity sensed by the sensing pixels near the periphery in the sensing module is often lower than the light intensity sensed by the sensing pixels near the center in the sensing module, so that the intensity of the light signal obtained by the sensing module has a fall, which affects the accuracy of fingerprint sensing. Therefore, in the current solution, the signal strength is often corrected by the backend software, but the corrected image still has side effects, such as amplifying noise (noise) to cause detail loss. Therefore, the skilled person is engaged in research on how to make the fingerprint sensing module sense uniform light signal intensity.
Disclosure of Invention
The present invention is directed to an electronic device having a good fingerprint sensing effect.
The embodiment of the invention provides an electronic device for sensing a fingerprint image of a finger, and the electronic device comprises a light-emitting element, a sensing module and a controller. The light-emitting element comprises a plurality of light-emitting pixels which are arranged in an array, have a fingerprint sensing area and are used for providing irradiation light beams to the finger. The sensing module is configured below the fingerprint sensing area and used for receiving the irradiation light beam which reaches the sensing module after being reflected by the finger so as to generate a fingerprint image. The controller is electrically connected to the light-emitting element to control the light-emitting element to emit light, wherein the fingerprint sensing area is at least divided into a first area and a second area from the center to the periphery of the fingerprint sensing area. When the light-emitting element provides illumination light beams to illuminate the finger, the controller controls the light color emitted by the light-emitting pixels in the first area and the light color emitted by the light-emitting pixels in the second area, so that the quantum efficiency of the sensing module for the light color emitted by the light-emitting pixels in the first area is smaller than the quantum efficiency of the sensing module for the light color emitted by the light-emitting pixels in the second area.
In the electronic device according to the embodiment of the invention, when the light emitting element provides the irradiation light beam to irradiate the finger, the controller controls the light emitting pixels in the fingerprint sensing region from the center to the periphery to emit light with a quantum efficiency which is gradually increased.
In the electronic device according to the embodiment of the present invention, the light emitting element is a transparent display panel.
In the electronic device according to the embodiment of the present invention, the transparent display panel is an organic light emitting diode display panel.
In an electronic device according to an embodiment of the present invention, the sensing module includes an image sensor.
In the electronic device according to the embodiment of the invention, the quantum efficiencies corresponding to the plurality of different light colors emitted by the light-emitting pixels are respectively equivalent to the quantum efficiencies corresponding to the plurality of different light with a single wavelength.
In the electronic device according to an embodiment of the invention, the electronic device further includes a memory for storing a relationship model between the light energy receiving speeds of the plurality of different positions of the sensing module and the plurality of different light colors of the light emitting element, and the controller controls the light color emitted by the light emitting pixels in the first region and the light color emitted by the light emitting pixels in the second region according to the relationship model.
In an electronic device according to an embodiment of the invention, the relational model includes a plurality of curves of light energy receiving speeds of the different light colors at the different positions.
In the electronic device according to the embodiment of the invention, the controller is configured to select a reference light energy receiving speed, determine a plurality of intersections of straight lines formed by the reference light energy receiving speed at the different positions and the curves, and use a plurality of light colors corresponding to the intersections as the light emitting colors of the light emitting pixels corresponding to the positions of the intersections.
In the electronic device according to the embodiment of the invention, the light energy receiving speeds at the different positions in the relation model are formed by the light-emitting pixels of the light-emitting element emitting light with the same intensity.
In the electronic device according to the embodiment of the invention, when the light emitting element provides the irradiation light beam to irradiate the finger, the controller controls the light emitting pixels emitting different light colors to have the same light emitting intensity.
In the electronic device according to the embodiment of the invention, the controller controls the light color emitted by the light-emitting pixels in the first region and the light color emitted by the light-emitting pixels in the second region, so that the quantum efficiency of the sensing module for the light color emitted by the light-emitting pixels in the first region is smaller than the quantum efficiency of the sensing module for the light color emitted by the light-emitting pixels in the second region, and therefore the light energy sensed by the center of the sensing module is close to the light energy sensed by the edge of the sensing module. Therefore, the image sensed by the sensing module can have uniform brightness, so that the condition that the middle bright edge is dark is inhibited, and the fingerprint sensing effect of the electronic device is further improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
Fig. 1A is a schematic cross-sectional view of an electronic device according to an embodiment of the invention.
Fig. 1B is a schematic top view of the fingerprint sensing area of the light emitting device in fig. 1A.
Fig. 2 is a light intensity distribution diagram of an irradiation light beam emitted by a light emitting element of the electronic device of fig. 1A.
Fig. 3 is a light intensity distribution diagram of an image detected by the sensing module when the light emitting time of all the light emitting pixels in the fingerprint sensing area is the same.
Fig. 4 is a light-emitting time distribution diagram of light-emitting pixels at each position in a fingerprint sensing region of the electronic device in fig. 1A.
FIG. 5 is a diagram illustrating a distribution of light energy detected by a sensing module of the electronic device of FIG. 1A in a unit time.
FIG. 6 is a graph of quantum efficiency of the sensing module of FIG. 1A for different wavelengths of light.
FIG. 7 is a diagram illustrating a relationship model stored in the memory unit of FIG. 1A.
Fig. 8 is a graph showing the relationship between the emission intensity of each color pixel of the light-emitting element in fig. 1A and the wavelength of light having a single wavelength corresponding thereto.
Detailed Description
Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Fig. 1A is a schematic cross-sectional view of an electronic device according to an embodiment of the invention, and fig. 1B is a schematic top view of a fingerprint sensing area of the light emitting element in fig. 1A. Referring to fig. 1A and fig. 1B, the electronic device 100 of the present embodiment is used for sensing a fingerprint image of a finger 10 of a user, and the electronic device 100 includes a light emitting element 20, a sensing module 60 and a controller 80. The light emitting device 20 includes a plurality of light emitting pixels arranged in an array, has a fingerprint sensing area 22, and is used for providing an illumination beam to the finger 10 of a user, and the user can place the finger 10 on the fingerprint sensing area 22 for fingerprint sensing.
In the present embodiment, the light emitting device 20 is, for example, a display panel (e.g., a transparent display panel), a touch display panel (e.g., a transparent touch display panel), or a combination thereof with a finger pad. For example, the Light Emitting element 20 is an Organic Light-Emitting Diode display panel (OLED display panel), but the invention is not limited thereto. Alternatively, the light emitting element 20 may be a touch display panel, such as an organic light emitting diode display panel having a plurality of touch electrodes. The touch electrodes can be formed on the outer surface of the organic light emitting diode display panel or embedded in the organic light emitting diode display panel, and touch detection can be performed by the touch electrodes in a self-capacitance or mutual-capacitance mode. Alternatively, the light emitting element 20 may refer to a combination of a pressure plate and a display panel or a combination of a pressure plate and a touch display panel.
In the present embodiment, the electronic device 100 may further include an optical module 40 disposed between the fingerprint sensing area 22 and the sensing module 60 to guide the illumination beam reflected by the finger 10 to the sensing module 60 to form a fingerprint image. The optical module 40 is, for example, a lens set, has a collimator (collimator) structure, and/or includes a micro-lens (micro-lens) layer and/or a micro-hole (pin-holes) layer. In the present embodiment, the optical module 40 is, for example, a lens assembly, and includes a combination of one or more optical lenses with diopter, such as various combinations of non-planar lenses including a biconcave lens, a biconvex lens, a meniscus lens, a convex-concave lens, a plano-convex lens, and a plano-concave lens, and the invention is not limited to the type and kind of the optical module 40. For example, the optical module 40 is composed of two lenses, but in other embodiments, the optical module may be composed of three lenses or four lenses, and the invention is not limited thereto.
In the present embodiment, the sensing module 60 is disposed below the fingerprint sensing area 22 for receiving the illumination beam reflected by the finger 10 and reaching the sensing module to generate a fingerprint image. The sensing module 60 includes an image sensor including a plurality of sensing pixels arranged in a sensing array, wherein each sensing pixel may include at least one photodiode (photodiode), but the invention is not limited thereto. When sensing a fingerprint, a user places the finger 10 close to or on the fingerprint sensing area 22 of the light emitting device 20, and the light emitting device 20 emits an illumination beam to the finger 10, and the illumination beam is reflected by the finger and then sequentially transmitted through the light emitting device 20 and the optical module 40, and then transmitted to the sensing module 60 for fingerprint sensing.
In addition, the electronic device 100 further includes a controller 80 electrically connected to the light emitting element 20 to control the light emitting of the light emitting element 20. The fingerprint sensing area 22 may be divided into at least a first area 222 and a second area 224 from the center to the periphery thereof, and when the light emitting device 20 provides the illumination beam to illuminate the finger 10, the controller 80 controls the light color emitted by the light emitting pixels in the first area 222 and the light color emitted by the light emitting pixels in the second area 224, so that the quantum efficiency of the sensing module 60 for the light color emitted by the light emitting pixels in the first area 222 is smaller than the quantum efficiency of the sensing module 60 for the light color emitted by the light emitting pixels in the second area 224. In this way, the light energy sensed by the center of the sensing module 60 is close to the light energy sensed by the edge of the sensing module 60, so that the image sensed by the sensing module 60 can have a uniform brightness, and the situation that the middle bright edge of the sensed image is dark in the prior art is suppressed. In an embodiment, when the light emitting device 20 provides the illumination beam to illuminate the finger 10, the controller 80 controls the quantum efficiency corresponding to the light color emitted by the light emitting pixels from the center to the periphery in the fingerprint sensing area 22 to show an increasing trend, so that the brightness of the image sensed by the sensing module 60 is uniform over the whole area, thereby further improving the quality of the fingerprint image and further effectively improving the success rate and accuracy of the fingerprint identification.
Fig. 2 is a light intensity distribution diagram of an irradiation light beam emitted by a light emitting element of the electronic device of fig. 1A. Referring to fig. 1A, fig. 1B and fig. 2, when a user places a finger 10 or an object on the fingerprint sensing area 22 of the light emitting device 20 for fingerprint identification sensing, the fingerprint sensing area 22 of the light emitting device 20 emits an illumination beam to illuminate the finger 10 or the object, and at this time, the light intensity in the fingerprint sensing area 22 is uniform, for example. At this time, if the light emitting colors of all the light emitting pixels in the fingerprint sensing area 22 are the same, the light intensity of the image detected by the sensing module 60 is as shown in fig. 3, and there may be a case that the middle bright edge is dark. However, in the present embodiment, the controller 80 controls the quantum efficiency corresponding to the light color emitted by the light-emitting pixels from the center to the periphery in the fingerprint sensing area 22 to show an increasing trend, as shown in fig. 4, the light energy detected by the sensing pixels at various positions on the sensing module 60 is uniform, as shown in fig. 5, and the detected light energy is reflected on the brightness of the image sensed by the sensing module 60. That is, the sensing module 60 may sense an image having uniform brightness by the controller 80 performing the above-described control. The center line C1 in fig. 2 and 4 corresponds to the center position of the fingerprint sensing area 22, i.e. position 0 in the figure, and the center line C2 in fig. 3 and 5 corresponds to the center position of the sensing module 60, i.e. position 0 in the figure.
In the present embodiment, the electronic device 100 may be a handheld electronic device, such as a smart phone, a tablet computer, etc., and the light emitting device 20 may be used as a display to display a frame (frame) that a user needs to watch when the user does not perform fingerprint recognition. In fingerprint recognition, the light emitting device 20 can emit light over the entire surface or only in the fingerprint sensing area 22 to generate an illumination beam for illuminating the finger 10.
In one embodiment, the controller 80 is, for example, a Central Processing Unit (CPU), a microprocessor (microprocessor), a Digital Signal Processor (DSP), a programmable controller, a Programmable Logic Device (PLD), or other similar devices or combinations thereof, which are not limited in the present invention. In addition, in one embodiment, the functions of the controller 80 may be implemented as a plurality of program codes. These program codes are stored in a memory and executed by the controller 80. Alternatively, in one embodiment, the functions of the controller 80 may be implemented as one or more circuits. The present invention is not limited to the implementation of the functions of the controller 80 in software or hardware.
In addition, in the present embodiment, the controller 80 may also be electrically connected to the sensing module 60, so as to synchronize the light emitting time of the light emitting element 20 with the sensing time of the sensing module 60.
Fig. 6 is a graph showing the relationship between the quantum efficiency of the sensing module in fig. 1A and the light with different wavelengths, fig. 7 is a relationship model stored in the memory cell in fig. 1A, and fig. 8 is a relationship graph showing the relationship between the light emitting intensity of each color light emitting pixel of the light emitting element in fig. 1A and the wavelength of the light with a single wavelength corresponding to the light emitting pixel. Referring to fig. 6, as can be seen from fig. 6, the sensing module 60 has different quantum efficiencies for light with different wavelengths, wherein the sensing module has the maximum quantum efficiency for light with a wavelength close to 550 nanometers (nm), and the quantum efficiencies decrease as the wavelength gradually increases or decreases. The color of light emitted by the light-emitting pixels of the light-emitting element 20 can be used to simulate light of a single wavelength in fig. 6. For example, each light-emitting pixel may have a red sub-pixel for emitting red light, a green sub-pixel for emitting green light, and a blue sub-pixel for emitting blue light, and the light-emitting pixels may generate different light colors by controlling the ratio of the light-emitting intensities of the red sub-pixel, the green sub-pixel, and the blue sub-pixel, so as to simulate different lights with a single wavelength. The wavelengths corresponding to the emission intensities of the red, green and blue sub-pixels are shown in fig. 8, when it is desired to obtain how much proportion of red, blue and green light can be mixed for a single wavelength of light, a lead line at the wavelength can be drawn in fig. 8, and three intersection points of the lead line and a curve representing the normalized emission intensities of the red, green and blue light with respect to the wavelength are obtained, respectively, and the ordinate of the three intersection points represents the normalized light intensities required to be emitted by the red, green and blue sub-pixels when the wavelength is to be simulated. The quantum efficiency of the sensing module 60 for the light of a certain light color emitted by adjusting the ratio of the light intensities of the red sub-pixel, the green sub-pixel and the blue sub-pixel is equal to the quantum efficiency of the sensing module 60 for the light of a single wavelength simulated by the light color. That is, the quantum efficiencies corresponding to the plurality of different light colors emitted by the light-emitting pixels of the light-emitting element 20 are respectively equivalent to the quantum efficiencies corresponding to the plurality of different lights with a single wavelength.
Referring to fig. 1A and 7, the electronic device 100 of the present embodiment further includes a memory 90 for storing a relationship model between light energy receiving speeds at a plurality of different positions of the sensing module 60 and a plurality of different light colors of the light emitting element 20, and the controller 80 controls the light color emitted by the light emitting pixels in the first region 222 and the light color emitted by the light emitting pixels in the second region 224 according to the relationship model, or controls the light color emitted by the light emitting pixels at each position of the fingerprint sensing region 22 of the light emitting element 20 according to the relationship model.
In the present embodiment, the relationship model includes a plurality of curves of light energy receiving speeds of the different light colors at the different positions, such as curves D1, D2, D3, D4 and D5 shown in fig. 7, where the light energy receiving speed is, for example, an analog-to-digital conversion energy speed (analog-to-digital conversion energy speed), which represents the light energy received by the pixel of the sensing module 60 in a unit time and corresponds to the light intensity detected by the pixel. In the present embodiment, the light energy receiving speeds at the different positions in the relation model are formed by the light-emitting pixels of the light-emitting device 20 emitting light with the same intensity. For example, before the electronic device 100 leaves the factory, the light-emitting pixels of the light-emitting element 20 can all emit light of a certain color, and the light-emitting intensities of the light-emitting pixels are all the same, and the sensing module 60 can sense the light-emitting pixels to obtain data of a curve (for example, data of a curve D1) as shown in fig. 7. Then, the light-emitting pixels of the light-emitting device 20 emit light of another color, and the light-emitting intensities of the light-emitting pixels are kept unchanged, and the sensing module 60 senses to obtain data of another curve (for example, data of a curve D2) as shown in fig. 7, and so on to obtain all curves (for example, curves D1 to D5, and the data of the curves are stored in the memory 90 as the above-mentioned relation model.
In the present embodiment, when the user uses the electronic device 100 to sense a fingerprint, the controller 80 can select a reference light energy receiving speed, determine intersections of a straight line (e.g., the horizontal line H1 in fig. 7) formed by the reference light energy receiving speed at the different positions and the curves (e.g., the curves D1 to D5 in fig. 7), and use a plurality of light colors corresponding to the intersections as the light emitting colors of the light emitting pixels corresponding to the positions of the intersections. For example, when the controller 80 selects the a/D conversion energy velocity V1 as the reference value (the reference value may be selected, for example, at or near the peak value of the curve with the lowest peak value), the intersection point of the horizontal line H1 falling on the reference value and the curves (for example, the curves D1 to D5) may be determined. In fig. 7, the abscissa of the two intersection points of the horizontal line H1 and the curve D1 (i.e., the position coordinates on the sensing module 60) is the position P1 and the position P2, and the controller 80 can control the light color emitted by the light-emitting pixels on or near the positions corresponding to the positions P1 and P2 of the light-emitting element 20 to adopt the light color represented by the curve D1. Similarly, the controller 80 can determine the abscissa of the two intersection points of the horizontal line H1 and the curve D2 (i.e., the position coordinates on the sensing module 60) as the position P3 and the position P4, and the controller 80 can control the light color emitted by the light-emitting pixels on the light-emitting element 20 corresponding to the positions P3 and P4 or the light color near the positions to adopt the light color represented by the curve D2. Similarly, the controller 80 can determine the abscissa of the two intersection points of the horizontal line H1 and the curve D3 (i.e., the position coordinates on the sensing module 60) as the position P5 and the position P6, and the controller 80 can control the light color emitted by the light-emitting pixels on the light-emitting element 20 corresponding to the positions P5 and P6 or the light color near the positions to adopt the light color represented by the curve D3. Similarly, the light color of the light-emitting pixel at or near the position on the light-emitting element 20 corresponding to the intersection of the horizontal line H1 and the other curve (e.g., the curves D4 and D5) can also be determined. In this way, the controller 80 can control the light color emitted by the light-emitting pixels in the first region 222 and the light color emitted by the light-emitting pixels in the second region 224 according to the relational model, or control the light color emitted by the light-emitting pixels at each position of the fingerprint sensing region 22 of the light-emitting device 20 according to the relational model.
In the present embodiment, when the light emitting device 20 provides the illumination beam to illuminate the finger 10, the controller 80 controls the light emitting pixels emitting different light colors to have the same light emitting intensity. Or, further, when the light emitting element 20 provides the irradiation light beam to irradiate the finger 10, the controller 80 controls the light emitting intensity of each light emitting pixel in the fingerprint sensing area 22 of the light emitting element 20 to be the same, although the light emitting colors of different light emitting pixels may be different.
In summary, in the electronic device according to the embodiment of the invention, the controller controls the light color emitted by the light-emitting pixels in the first region and the light color emitted by the light-emitting pixels in the second region, so that the quantum efficiency of the sensing module for the light color emitted by the light-emitting pixels in the first region is smaller than the quantum efficiency of the sensing module for the light color emitted by the light-emitting pixels in the second region, and therefore the light energy sensed by the center of the sensing module is close to the light energy sensed by the edge of the sensing module. Therefore, the image sensed by the sensing module can have uniform brightness, so that the condition that the middle bright edge is dark is inhibited, and the fingerprint sensing effect of the electronic device is further improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. An electronic device for sensing a fingerprint image of a finger, comprising:
a light emitting element including a plurality of light emitting pixels arranged in an array, having a fingerprint sensing area, and configured to provide an irradiation beam to the finger;
a sensing module disposed under the fingerprint sensing area for receiving the illumination beam reflected by the finger and reaching the sensing module to generate the fingerprint image; and
a controller electrically connected to the light emitting element to control light emission of the light emitting element, wherein the fingerprint sensing area is divided into at least a first area and a second area from a center to a periphery thereof, and when the light emitting element provides the illumination beam to illuminate the finger, the controller controls a light color emitted by the light emitting pixels in the first area and a light color emitted by the light emitting pixels in the second area, so that a quantum efficiency of the sensing module to the light color emitted by the light emitting pixels in the first area is smaller than a quantum efficiency of the sensing module to the light color emitted by the light emitting pixels in the second area.
2. The electronic device of claim 1, wherein the controller controls a quantum efficiency of light emitted by light-emitting pixels in the fingerprint sensing region from the center to the periphery to show an increasing trend when the light-emitting elements provide the illuminating light beam to illuminate the finger.
3. The electronic device according to claim 1, wherein the light-emitting element is a transparent display panel.
4. The electronic device according to claim 3, wherein the transparent display panel is an organic light emitting diode display panel.
5. The electronic device of claim 1, wherein the sensing module comprises an image sensor.
6. The electronic device of claim 1, wherein quantum efficiencies corresponding to a plurality of different light colors emitted by the plurality of light-emitting pixels are respectively equivalent to quantum efficiencies corresponding to a plurality of different single wavelengths of light.
7. The electronic device of claim 1, further comprising a memory for storing a relationship model between light energy receiving speeds of different positions of the sensing module and different light colors of the light emitting elements, and the controller controls the light color emitted by the light emitting pixels in the first region and the light color emitted by the light emitting pixels in the second region according to the relationship model.
8. The electronic device of claim 7, wherein the relational model comprises a plurality of curves of light energy receiving speeds of the plurality of different light colors at the plurality of different positions.
9. The electronic device according to claim 8, wherein the controller is configured to select a reference light energy receiving speed, determine a plurality of intersections between the straight lines formed by the reference light energy receiving speed at the different positions and the curves, and use a plurality of light colors corresponding to the intersections as the light emitting colors of the light emitting pixels corresponding to the positions of the intersections.
10. The electronic device of claim 9, wherein the quantum efficiencies corresponding to the plurality of different light colors are respectively equivalent to the quantum efficiencies corresponding to the plurality of different light with a single wavelength.
11. The electronic device according to claim 7, wherein the light energy receiving speeds of the plurality of different positions in the relationship model are formed by the plurality of light-emitting pixels of the light-emitting element emitting light with the same intensity.
12. The electronic device of claim 7, wherein the controller controls the light-emitting pixels emitting different light colors to emit the same light intensity when the light-emitting element provides the illumination beam to illuminate the finger.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201962864586P | 2019-06-21 | 2019-06-21 | |
| US62/864,586 | 2019-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111104939A true CN111104939A (en) | 2020-05-05 |
Family
ID=70423987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911341938.9A Pending CN111104939A (en) | 2019-06-21 | 2019-12-24 | Electronic device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111104939A (en) |
| WO (1) | WO2020253190A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111104939A (en) * | 2019-06-21 | 2020-05-05 | 神盾股份有限公司 | Electronic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170220838A1 (en) * | 2015-06-18 | 2017-08-03 | Shenzhen Huiding Technology Co., Ltd. | Under-screen optical sensor module for on-screen fingerprint sensing |
| CN107580709A (en) * | 2015-06-18 | 2018-01-12 | 深圳市汇顶科技股份有限公司 | Multifunctional fingerprint sensor with optical sensor ability |
| CN108766987A (en) * | 2018-05-31 | 2018-11-06 | 上海天马有机发光显示技术有限公司 | A kind of display device and its driving method |
| CN109313703A (en) * | 2018-08-15 | 2019-02-05 | 深圳市汇顶科技股份有限公司 | Shield lower optical fingerprint identification system, backlight module, display screen and electronic equipment |
| WO2020253190A1 (en) * | 2019-06-21 | 2020-12-24 | 神盾股份有限公司 | Electronic device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10235556B2 (en) * | 2015-12-13 | 2019-03-19 | Joshua Noel Hogan | Frustrated total internal reflection fingerprint detector |
| CN107275374B (en) * | 2017-05-31 | 2019-06-11 | 北京小米移动软件有限公司 | Oled panel, mould group, fingerprint identification method, device and storage medium |
-
2019
- 2019-12-24 CN CN201911341938.9A patent/CN111104939A/en active Pending
- 2019-12-24 WO PCT/CN2019/127978 patent/WO2020253190A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170220838A1 (en) * | 2015-06-18 | 2017-08-03 | Shenzhen Huiding Technology Co., Ltd. | Under-screen optical sensor module for on-screen fingerprint sensing |
| CN107580709A (en) * | 2015-06-18 | 2018-01-12 | 深圳市汇顶科技股份有限公司 | Multifunctional fingerprint sensor with optical sensor ability |
| CN108766987A (en) * | 2018-05-31 | 2018-11-06 | 上海天马有机发光显示技术有限公司 | A kind of display device and its driving method |
| CN109313703A (en) * | 2018-08-15 | 2019-02-05 | 深圳市汇顶科技股份有限公司 | Shield lower optical fingerprint identification system, backlight module, display screen and electronic equipment |
| WO2020253190A1 (en) * | 2019-06-21 | 2020-12-24 | 神盾股份有限公司 | Electronic device |
Non-Patent Citations (1)
| Title |
|---|
| 李鹏飞等: "屏下指纹识别的概念、技术与发展", 《中国科技术语》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020253190A1 (en) | 2020-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108287634B (en) | Touch display panel, display device and driving method of touch display panel | |
| CN108615008B (en) | Display panel and display device | |
| US10720099B2 (en) | OLED array substrate, OLED display panel, pixel circuit, driving method and method for fingerprint recognition using OLED display panel | |
| KR100684252B1 (en) | Display device having optical input function | |
| WO2017206558A1 (en) | Display device and fingerprint identification method thereof | |
| US10394406B2 (en) | Touch display device | |
| US11288485B2 (en) | Driving method and an apparatus for a fingerprint recognition device | |
| US20130100026A1 (en) | Proximity Screen Display and User Interface | |
| CN109215604A (en) | Display device and its lines recognition methods, product, the lines recognition means of realizing this method | |
| CN105867701A (en) | Integrated photoelectric touch screen and apparatus, electronic device as well as touch identification method and system | |
| US11568805B2 (en) | Display device and data monitoring method | |
| CN108846371B (en) | Display device and fingerprint identification method thereof | |
| WO2021013253A1 (en) | Electronic device and imaging method thereof | |
| TW202014772A (en) | Method for aligning fingerprint sensing area of display element with fingerprint sensing module | |
| CN102314265A (en) | Optical profile type pick-up unit, display device and electronic equipment | |
| CN111325168A (en) | Display panel and control method thereof | |
| CN111104939A (en) | Electronic device | |
| CN210721505U (en) | Electronic device | |
| US20200117933A1 (en) | Light-emitting signal intensity control method and electronic device | |
| US11270097B2 (en) | Electronic device having fingerprint sensing function and fingerprint sensing method | |
| CN112418047B (en) | Display panel, fingerprint identification driving method and display device | |
| WO2020253250A1 (en) | Electronic device | |
| US11776297B2 (en) | Coordinate transformation method used for imaging under screen, storage medium and electronic device | |
| US20220058361A1 (en) | Topological structure light source driving method, storage medium and electronic device applied to off screen imaging | |
| CN206849036U (en) | Biological identification device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200505 |
|
| WD01 | Invention patent application deemed withdrawn after publication |