CN110717364B - Glass cover plate, terminal, fingerprint identification method, fingerprint identification device and storage medium - Google Patents
Glass cover plate, terminal, fingerprint identification method, fingerprint identification device and storage medium Download PDFInfo
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- CN110717364B CN110717364B CN201810770727.6A CN201810770727A CN110717364B CN 110717364 B CN110717364 B CN 110717364B CN 201810770727 A CN201810770727 A CN 201810770727A CN 110717364 B CN110717364 B CN 110717364B
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- cover plate
- fingerprint
- photoelectric sensing
- display screen
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- 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
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
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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
- G06V40/1347—Preprocessing; Feature extraction
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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
- G06V40/1365—Matching; Classification
Abstract
The disclosure provides a glass cover plate, a terminal, a fingerprint identification method, a fingerprint identification device and a storage medium, wherein a plurality of receiving units are arranged on a glass cover plate body, and each receiving unit is small, and the size is matched with the sizes of fingerprint ridges and fingerprint valleys. The receiving unit comprises a photoelectric sensing unit sensitive to photoelectric effect and a current transmission circuit with one end connected to the photoelectric sensing unit; the other end of the current transmission circuit is connected with the signal processing module of the terminal so as to transmit the current of the photoelectric sensing unit to the signal processing module for processing. Therefore, when the terminal provided with the glass cover plate is used, current can be generated through the photoelectric effect of the photoelectric sensing units, and fingerprint identification under the screen can be realized by calculating fingerprints according to the current generated by each photoelectric sensing unit. The method and the device can effectively realize the identification of the fingerprints under the screen, and the structure and the implementation method are different from the related structure and method for realizing the identification of the fingerprints under the screen, so that the method and the device have development.
Description
Technical Field
The present disclosure relates to, but not limited to, the field of terminal technologies, and in particular, but not limited to, a glass cover plate, a terminal, a fingerprint identification method, a fingerprint identification device, and a storage medium.
Background
With the continuous development of intelligent terminals, fingerprint identification technology has become a standard technology of intelligent terminals. End products that can perform off-screen fingerprint recognition are already present on the market. For these terminal products, the off-screen fingerprint identification is realized mainly based on the following two technical schemes: 1. optical fingerprint identification technology: the principle that the light rays are reflected and refracted on uneven lines on the surface of the finger, so that the returned light rays have different brightness degrees is utilized, an optical sensor is arranged around or below a luminous structure of the terminal to receive reflected light, a digital gray fingerprint image is obtained through an image sensing device, and fingerprint identification is further realized. 2. Ultrasonic fingerprint identification technology: through setting up ultrasonic sensor in the display screen below, utilize the ability that ultrasonic wave penetrated the material, distinguish the position that fingerprint ridge and valley place according to the echo difference that reachs different material surfaces and produce, and then realize discernment fingerprint.
Disclosure of Invention
The embodiment of the disclosure provides a glass cover plate, a terminal, a fingerprint identification method, a fingerprint identification device and a storage medium, which mainly solve the technical problems that: a novel structure and method for enabling off-screen fingerprint identification is provided.
To solve the above technical problems, an embodiment of the present disclosure provides a glass cover plate, including: a glass cover plate body and a plurality of receiving units arranged on the glass cover plate body; the size of each receiving unit is matched with the sizes of fingerprint ridge lines and fingerprint valley lines;
the receiving unit comprises a photoelectric sensing unit sensitive to photoelectric effect and a current transmission circuit with one end connected to the photoelectric sensing unit; the other end of the current transmission circuit is connected with a signal processing module of the terminal so as to transmit the current signal of the photoelectric sensing unit to the signal processing module for processing.
In addition, the embodiment of the disclosure also provides a terminal, which comprises a display screen and a signal processing module; the display screen comprises the glass cover plate; the photoelectric sensing unit in the glass cover plate is connected with the signal processing module through a current transmission circuit.
The embodiment of the disclosure also provides a fingerprint identification method applied to the terminal, comprising the following steps:
when a touch operation on a display screen is detected, controlling a display panel of the display screen to emit light;
receiving current signals generated by all photoelectric sensing units; the photoelectric sensing unit is arranged on a glass cover plate of the display screen; the current signal triggers the photoelectric effect to generate after the photoelectric sensing unit receives the reflected light of the light emitted by the display panel;
and calculating fingerprints corresponding to the touch operation according to the current signals generated by the photoelectric sensing units and the position information of the photoelectric sensing units.
The embodiment of the disclosure also provides a fingerprint identification device, which comprises:
the control module is used for controlling the display panel of the display screen to emit light when the touch operation acted on the display screen is detected;
the receiving module is used for receiving the current signals generated by the photoelectric sensing units; the photoelectric sensing unit is arranged on a glass cover plate of the display screen; the current signal triggers the photoelectric effect to generate after the photoelectric sensing unit receives the reflected light of the light emitted by the display panel;
and the fingerprint calculation module is used for calculating fingerprints corresponding to the touch operation according to the current signals generated by the photoelectric sensing units and the position information of the photoelectric sensing units.
The disclosed embodiments also provide a storage medium having stored therein computer-executable instructions for performing the foregoing fingerprint identification method.
The beneficial effects of the present disclosure are:
the embodiment of the disclosure provides a glass cover plate, a terminal, a fingerprint identification method, a fingerprint identification device and a storage medium, wherein a plurality of receiving units are arranged on a glass cover plate body of the glass cover plate, and each receiving unit is small, and the size of each receiving unit is matched with the size of fingerprint ridge lines and fingerprint valley lines. The receiving unit comprises a photoelectric sensing unit sensitive to photoelectric effect and a current transmission circuit with one end connected to the photoelectric sensing unit; the other end of the current transmission circuit is used for being connected with a signal processing module of the terminal so as to transmit a current signal of the photoelectric sensing unit to the signal processing module for processing. Therefore, when the terminal provided with the glass cover plate is used, the terminal can control the display panel of the display screen to emit light when detecting touch operation acted on the display screen, further, a touch object (such as a finger) can cause reflection of light, when the reflected light irradiates the photoelectric sensing units, the photoelectric sensing units trigger the photoelectric effect to generate current signals, and further, the signal processing module of the terminal can calculate fingerprints corresponding to the touch operation according to the current signals generated by the photoelectric sensing units and the position information of the photoelectric sensing units, so that fingerprint identification under the screen is realized. The glass cover plate, the terminal, the fingerprint identification method, the fingerprint identification device and the storage medium can effectively realize the identification of fingerprints under the screen, and meanwhile, the structure and the implementation method are different from the related structure and method for realizing the fingerprint identification under the screen, so that the method has development.
Drawings
Fig. 1 is a schematic structural view of a glass cover plate according to a first embodiment of the disclosure;
fig. 2 is a schematic diagram of a receiving unit according to a first embodiment of the disclosure;
fig. 3 is a schematic diagram of a photo-sensing unit according to a first embodiment of the disclosure;
fig. 4 is a schematic diagram of a terminal structure according to a first embodiment of the disclosure;
fig. 5 is a basic flow diagram of a fingerprint identification method according to a first embodiment of the disclosure;
fig. 6 is a schematic structural diagram of an OLED display panel according to a first embodiment of the disclosure;
fig. 7 is a schematic diagram of a terminal structure according to a second embodiment of the disclosure;
fig. 8 is a schematic diagram of a more specific fingerprint identification process according to a second embodiment of the disclosure;
fig. 9 is a schematic structural diagram of a fingerprint identification apparatus according to a third embodiment of the present disclosure.
Detailed Description
Various embodiments of the disclosed concept will now be described in more detail with reference to the accompanying drawings. The disclosed concept may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosed concept to those skilled in the art. Throughout the above description and the accompanying drawings, the same reference numbers and designations represent the same or similar elements.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements or operations, these elements or operations should not be limited by these terms. These terms are only used to distinguish one element or operation from another. For example, a first receiving unit may be referred to as a second receiving unit, and similarly, a second receiving unit may be referred to as a first receiving unit without departing from the teachings of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosed concept. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, regions, sections, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, sections, steps, operations, elements, components, and/or groups thereof.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and/or the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiments of the present disclosure will be described in further detail below with reference to the drawings by way of specific embodiments.
Embodiment one:
referring to fig. 1, fig. 1 is a schematic structural diagram of a glass cover plate in a display screen according to a first embodiment of the present disclosure, including: a glass cover body 11, and a plurality of receiving units 12 provided on the glass cover body 11. Wherein, see fig. 2:
the receiving units 12 each include a photo sensing unit 121 and a current transmission circuit 122. It should be noted that, in the present embodiment, the photo-sensing unit 121 should be sensitive to the photo-electric effect, that is, when receiving the light of the corresponding frequency band, electrons can overflow to generate current. In this embodiment, the photo-sensing unit 121 may be a wire, for example, a rubidium wire, a potassium wire, a sodium-potassium alloy wire, a sodium wire, a lithium wire, a magnesium wire, a thallium wire, a zinc wire, a selenium wire, or the like, or a wire structure with good photo-electric effect formed of a nonmetallic element.
In practical applications, the light that the terminal display screen can generate is visible light, so in order to facilitate control whether the photoelectric effect needs to be triggered, it may be set that when an object is detected to touch the display screen, the display screen is controlled to emit light so as to trigger the photoelectric sensing unit 121 to generate the photoelectric effect. It should be noted that, for the display screen, it essentially includes a display panel and a glass cover plate. The glass cover plate is covered on the display panel and directly contacts with the outside of the terminal to protect the display panel. The display panel is a main component for realizing the picture display of the terminal, and can emit light rays and emit light rays with different colors according to the picture requirement to form a picture to be displayed.
It should be noted that, in a specific implementation manner of this embodiment, a metal wire that can generate a photoelectric effect in the visible light frequency range may be selected as the photoelectric sensing unit 121, so that the bonding is practical, and no additional device is required for the terminal to be provided to emit light outside the visible light frequency range. For example, if a wire, which can generate a photoelectric effect in the ultraviolet frequency range, is selected as the photoelectric sensing unit 121, the terminal needs to be additionally provided with an ultraviolet emitter, which increases the cost, and furthermore, long-term irradiation of light outside the visible frequency range, such as ultraviolet light, may also have an adverse effect on the human body.
It is particularly noted that the size of each receiving unit in this embodiment is matched to the size of the fingerprint ridge and fingerprint valley. Specifically, the photo-sensing units in the size of each receiving unit should be equal to or smaller than the sizes of the fingerprint ridges and fingerprint valleys.
It should be understood that, since the receiving unit is disposed on the glass cover plate, display shielding may be caused theoretically, and display effects may be affected. In addition, since it is generally only effective for human eyes to recognize objects having a diameter exceeding 100 micrometers, in one embodiment of the present invention, the diameter of the wire used as the photo-sensing unit may be smaller than 100 micrometers, for example, the diameter of the wire may be 100 nanometers or the like (it should be noted that, for a normal person, the widths of the ridges and valleys of the finger print in a human finger are typically about a fraction of a millimeter to one millimeter, and are greater than 100 micrometers).
It should also be understood that, to ensure a display effect, the spacing between adjacent wires should be sufficiently large on the basis that the individual wires are sufficiently small and invisible to ensure a display effect when the display panel is performing a picture display. Specifically, the distance between two adjacent wires in this embodiment should be greater (or even much greater) than the diameter of each wire. For example, when the diameter of the wire as the photo-sensing unit is smaller than 100 μm, the distance between two adjacent wires may be set to be larger than 100 μm in the present embodiment. For example, the diameter of the wire is set to 50 nanometers, and the distance between two adjacent wires is set to 200 micrometers.
It should be noted that the purpose of the wire in this embodiment is to receive the light reflected by the fingerprint ridge or the fingerprint valley, so as to generate a corresponding current, and enable the terminal to restore the fingerprint ridge or the fingerprint valley according to the current. This requires that the wires be arranged such that when a user touches the display, each wire receives light from as few fingerprint ridges or fingerprint valleys as possible, preferably only from one fingerprint ridge and/or one fingerprint valley, so that the current generated by one wire is affected by less fingerprint ridges or fingerprint valleys, and the recovered fingerprint information is more accurate. Particularly, when the light received by each metal wire is reflected light from only one fingerprint ridge line and/or one fingerprint valley line, namely, the current generated by each metal wire is influenced by only one fingerprint ridge line and/or one fingerprint valley line, the fingerprint information obtained after the terminal is processed according to the current generated by each metal wire is more accurate. In order to ensure that the current generated by each wire is only affected by one fingerprint ridge and/or one fingerprint valley, in a specific implementation of this embodiment, the length of the wire may be less than or equal to the width of the fingerprint ridge and the fingerprint valley. For example, the length of the wires may be set to be 100 μm or less, so that the wires are extremely small metal columns which may be uniformly arranged in a grid or matrix form on the glass panel, for example, in a matrix form in fig. 1.
In this embodiment, the current transmission circuit 122 is configured to transmit the current generated by the photo-sensing unit 121 to a signal processing module in the terminal for processing, so as to restore the fingerprint. Therefore, in the present embodiment, one end of the current transmission circuit 122 is connected to the photo-sensing unit 121, and the other end of the current transmission circuit 122 is connected to the signal processing module of the terminal, so as to transmit the current signal of the photo-sensing unit to the signal processing module for processing.
It should be appreciated that the current transfer circuit 122 may be implemented with wires, such as copper wires, or the like. It should also be understood that the current transmission circuit 122 may be attached to the glass cover plate, routed in the gap between the photo-sensing units, or may be attached to the glass cover plate, and routed under the glass cover plate, so as to increase the light transmission space of the display panel.
It is noted that in the present embodiment, to ensure the display effect of the terminal, it should be small enough for the current transmission circuit 122 to be even invisible to ensure the final display effect. In a specific implementation manner of this embodiment, the diameter of the current transmission circuit may be also smaller than 100 micrometers, so that the current transmission circuit does not affect the display effect.
In this embodiment, referring to fig. 3, the side of the photo-sensing unit 121 facing the display panel in the display screen may be covered with the light-shielding coating 31, and the side facing the outside of the terminal may not be covered with the light-shielding coating, so that when the display panel emits light, only those photo-sensing units receiving the reflected light will generate current, while those photo-sensing units not receiving the reflected light will generate no current, thus reducing the throughput of the signal processing module 32, and improving the processing accuracy (it should be understood that when the light-shielding coating is not covered, all photo-sensing units generate current, only those photo-sensing units receiving the reflected light generate stronger current, which makes the signal processing module need to process more current data, and only those photo-sensing units receiving the reflected light need to be screened out therefrom, thereby wasting processing resources and possibly having larger processing errors).
In this embodiment, each receiving unit may be specifically disposed on the outer contact surface of the glass cover body. The outer contact surface is a surface which can be directly contacted by a user in the glass cover plate. However, at this time, the receiving unit is arranged, so that the hand feeling of the user is not smooth and has concave-convex feeling when the user touches the device; in addition, the receiving unit can be directly contacted by an external object, so that the photoelectric sensitivity of the photoelectric sensing unit in the receiving unit can be influenced, and the service life of the receiving unit is shortened. In addition, in the present embodiment, each receiving unit may be provided in the glass cover plate body, that is, the receiving unit is embedded in the glass cover plate body, but this method requires much higher process requirements than the method of providing the receiving unit on one surface of the glass cover plate body, and the cost is high. In summary, in a specific implementation manner of this embodiment, each receiving unit may be specifically disposed on the protection surface of the glass cover body. It should be understood that the protective surface is the surface of the glass cover plate facing the display panel in the display screen. Therefore, the requirement on the setting process of the receiving unit is lower than that of embedding the receiving unit in the glass cover plate body, the cost is saved, and in addition, the receiving unit is not influenced by external objects because the receiving unit is arranged on the protection surface of the glass cover plate body, so that the service life of the receiving unit is ensured.
A terminal is also provided in this embodiment, and as shown in fig. 4, the terminal includes a display screen 40 and a signal processing module 41. It should be understood that the display screen 40 should include the glass cover plate with the above structure, where the photo sensing unit 121 in the glass cover plate is connected to the signal processing module 41 through the current transmission circuit 122.
The embodiment also provides a fingerprint identification method, which can be applied to the terminal, specifically, referring to fig. 5, including:
s501: when a touch operation on the display screen is detected, controlling a display panel of the display screen to emit light;
it should be understood that in the present embodiment, the display panel light emission should cover at least the touch position of the touch operation. For this purpose, the display panel may emit light in full screen or in partial area. For example, referring to the schematic structural diagram of an OLED (Organic Light-Emitting Diode) display panel shown in fig. 6, the OLED display panel is composed of a plurality of Light-Emitting units 61, the Light-Emitting units 61 are uniformly distributed at each position of the OLED display panel, each Light-Emitting unit can independently complete the brightness and color display of the area where the Light-Emitting unit is located, and all the Light-Emitting units together complete the image display of the whole screen area, so that the Light-Emitting of a part or all of the areas can be controlled by controlling the Light-Emitting units at different positions.
In this embodiment, if the partial area of the display panel is controlled to emit light, the area corresponding to the touch position of the touch operation in the display panel of the display screen can be controlled to emit light, so that the energy consumption is reduced while the enough light emitting area is ensured.
It should also be appreciated that for detection of a touch operation, the detection may be performed by existing means of detecting a touch operation, for example, when the display screen is a capacitive screen, the user's touch may cause a change in capacitance, so that the detection of a touch operation is determined when the capacitance changes. In addition, the specific location of the touch operation corresponding to the display screen can be determined by the existing determination method, and will not be described here.
S502: receiving current signals generated by all photoelectric sensing units;
it should be understood that the photo-sensing units are disposed on the glass cover plate of the display screen, after the display panel emits light, the fingers of the user on the display screen reflect the light emitted by the display panel, and after the reflected light is received by the photo-sensing units, the photo-sensing units receiving the reflected light trigger the photo-electric effect to generate a current signal. The current signals are transmitted to the signal processing module through the current transmission circuit connected with each photoelectric sensing unit.
Here, the signal processing module in this embodiment may be a separate signal processing circuit or chip, but may also be a processor.
S503: and calculating a fingerprint corresponding to the touch operation according to the current signals generated by the photoelectric sensing units and the position information of the photoelectric sensing units.
And the positions of the calculated fingerprint ridges and the calculated fingerprint valleys can be determined by combining the position information of the photoelectric sensing units, and the fingerprint corresponding to the touch operation can be obtained by combining the positions of the calculated fingerprint ridges and the calculated fingerprint valleys.
It should be understood that after calculating the fingerprint corresponding to the touch operation, the terminal may match the calculated fingerprint with a pre-stored fingerprint template, and if so, may perform the next operation, such as unlocking a screen. If the fingerprints are not matched, the user can be prompted that the fingerprints are input incorrectly and the fingerprints need to be input again.
According to the glass cover plate, the terminal provided with the glass cover plate and the fingerprint identification method applied to the terminal, through the photoelectric sensing units arranged on the glass cover plate, the photoelectric sensing units trigger the photoelectric effect to generate current by utilizing reflected light generated when a user touches the terminal, and then finger fingerprints when the user touches the terminal are calculated according to the generated current and the positions of the photoelectric sensing units generating the current, so that identification of fingerprints under a screen is effectively realized, and a new mode of display identification is provided for fingerprint identification under the screen.
In addition, since in the existing optical fingerprint recognition technology, an optical sensor needs to be disposed around or under a light emitting structure of a terminal to receive reflected light, display pixels may be increased; in the existing ultrasonic fingerprint identification technology, an additional ultrasonic sensor is required to be arranged, so that the problems of high power consumption and high cost exist. In this embodiment, the photo-sensing units may be wires with diameters and lengths smaller than 100 μm, which are invisible to the naked eye, so that the final display effect is hardly affected, and meanwhile, the display pixels are not increased, the power consumption is not increased, and the cost is low.
Embodiment two:
the embodiment further illustrates the scheme of the present disclosure through a more specific terminal structure and fingerprint identification process on the basis of the first embodiment.
Referring to fig. 7, the terminal includes an OLED display panel 71, a glass cover plate 72, a signal processing module 73, and a baseband processing module 74. The OLED display panel 71 is connected to the baseband processing module 74, and the receiving unit in the glass cover 72 is connected to the signal processing module 73.
Wherein:
the OLED display panel 71 may emit visible light under the control of the baseband processing module 74. The OLED display panel is composed of a plurality of light-emitting units, the light-emitting units are uniformly distributed at each position of the OLED display panel, each light-emitting unit can independently complete brightness and color display of the area where the light-emitting unit is located, and all the light-emitting units jointly complete image display of the whole screen area.
The glass cover 72 may be constructed such that, as shown in fig. 1, tens of thousands of receiving units are placed in a certain area or all areas, and the receiving units are uniformly arranged in a grid or matrix; the metal wire which is sensitive to photoelectric effect and invisible to human eyes is arranged in the receiving unit, and can overflow photoelectrons under the action of irradiation light to form current; the metal wire in the receiving unit faces one side of the OLED light-emitting unit and is covered with the shading coating, so that current generated by direct irradiation of light rays emitted by the OLED light-emitting unit on the metal wire can be avoided, and the metal wire faces one side of the finger touch area and is exposed on the surface of the metal wire for receiving reflected light rays.
The signal processing module 73 is connected to all receiving units, and can detect and receive the current information sent by all receiving units, and combine the physical positions of the receiving units to give out calculation of fingerprint ridge line and valley line areas, and finally match the calculation conclusion with the user fingerprint template pre-stored in the module to give out the judgment of whether the user fingerprint is.
The baseband processing module 74 may receive the fingerprint identification information transmitted from the signal processing module 73, and provide a next operation according to the information.
For example, referring to fig. 3, when light irradiates the surface of the metal wire, electrons on the surface of the metal wire absorb external photons and escape against the constraint of the metal, so that current is generated, and the above process is the photoelectric effect. It will be appreciated that the greater the intensity of the incident light per unit time, the greater the number of photons passing through the surface of the wire, the greater the number of photoelectrons that fly out, and the greater the current. The minimum optical frequencies required for the photoelectric effect of different metals are different, and the metal wires used in the present embodiment can generate the photoelectric effect in the visible frequency range.
Meanwhile, the diameter of the metal wire is small (can be smaller than 100 micrometers, even the diameter is nano), the metal wire is invisible to human eyes, a shading coating is covered on one side of the metal wire facing the OLED display panel, the current generated by directly irradiating the metal wire by light emitted by a light-emitting unit of the OLED display panel is avoided, the metal wire faces one side of a finger touch area, and the surface of the metal wire is exposed and used for receiving reflected light.
In addition, referring to fig. 8, fig. 8 is a schematic diagram of a more specific fingerprint identification process provided in this embodiment, including:
s801: when the user finger is detected to touch the display screen, the baseband processing module controls the light-emitting unit of the OLED display panel to emit visible light;
it should be understood that the light emitting area should cover the contact area of the finger.
S802: the metal wire receives reflected light and generates current under the photoelectric effect;
it should be understood that the light emitted by the light emitting unit will be reflected after striking the finger, and the reflected light will strike the wire of the receiving unit in the glass cover plate, and the wire will generate current under the photoelectric effect.
Specifically, the light rays are emitted to the finger region through the glass cover plate, and the light rays are unevenly reflected due to the concave-convex surface of the finger, and after the reflected light rays enter the glass cover plate, the reflected light rays irradiate the metal wires in the receiving unit. Wherein: when the fingerprint ridge line is contacted with the screen, a section of flatter area is formed, the intensity of light reflected by the area to the glass cover plate is larger and more uniform, so that the number of photons received by a receiving unit in the glass cover plate below the area is more, and the current generated by the metal wire is stronger; when the fingerprint valley line contacts with the screen, a section of a concave area is formed, the intensity of light reflected by the area to the glass cover plate is small and uneven, so that the number of photons received by a receiving unit in the glass cover plate below the area is small, and the current generated by the metal wire is weak and even cannot be generated. And the principle is that the signal processing module can then perform fingerprint reduction calculation according to the current of each metal wire.
S803: the signal processing module detects the current information sent by all the receiving units, combines the physical positions of the receiving units to calculate fingerprint ridge and valley areas, and finally matches the calculation conclusion with a user fingerprint template pre-stored in the module to judge whether the identification is successful or not;
s804: the baseband processing module receives the fingerprint identification result information transmitted by the signal processing module and gives out the next operation according to the result information.
Specifically, when the baseband processing module receives the information that the fingerprint identification is successful, the baseband processing module can execute operations such as screen unlocking and the like, and the flow is ended. When the baseband processing module receives the fingerprint identification failure information, the baseband processing module can inform the user of the failure of unlocking, please retry with the correct finger, and return to step 101.
According to the terminal and the flow provided by the embodiment, it can be seen that the terminal and the fingerprint identification method provided by the embodiment of the disclosure have at least the following advantages:
since in the existing optical fingerprint identification technology, an optical sensor needs to be arranged around or below a light emitting structure of a terminal to receive reflected light, display pixels can be increased; in the existing ultrasonic fingerprint identification technology, an additional ultrasonic sensor is required to be arranged, so that the problems of high power consumption and high cost exist. In this embodiment, the metal wires are arranged on the glass cover plate, the reflected light generated by the user touching is utilized to trigger the metal wires to generate current, and then the finger fingerprints of the user touching are calculated according to the generated current and the positions of the metal wires generating the current, so that the identification of the fingerprints under the screen is effectively realized, a new display identification mode is provided for the identification of the fingerprints under the screen, and meanwhile, the metal wires are invisible to the naked eyes, so that the final display effect is hardly affected while the display pixels are not increased, and meanwhile, the power consumption is not increased due to the fact that an additional ultrasonic sensor is not required, and the cost is lower.
Embodiment III:
the present embodiment provides a fingerprint identification apparatus based on the first embodiment. Referring to fig. 9, fig. 9 is a fingerprint recognition device 9 according to a third embodiment of the present disclosure, including: a control module 91, a receiving module 92 and a fingerprint calculation module 93. Wherein:
a control module 91 for controlling a display panel of the display screen to emit light when a touch operation on the display screen is detected;
a receiving module 92, configured to receive the current signal generated by each photo-sensing unit;
it should be noted that, the arrangement structure of the photoelectric sensing unit may be as shown in fig. 1, i.e. may be arranged on the glass cover plate of the display screen; the current signal triggers the photoelectric effect to generate after the photoelectric sensing unit receives the reflected light of the light emitted by the display panel.
The fingerprint calculation module 93 is configured to calculate a fingerprint corresponding to the touch operation according to the current signal generated by each photo sensor unit and the position information of each photo sensor unit.
It should be understood that in the present embodiment, the display panel light emission should cover at least the touch position of the touch operation. For this purpose, the display panel may emit light in full screen or in partial area. For example, referring to the schematic structural diagram of the OLED display panel shown in fig. 6, the OLED display panel is composed of a plurality of light emitting units 61, the light emitting units 61 are uniformly distributed at each position of the OLED display panel, each light emitting unit can independently complete the brightness and color display of the area where the light emitting unit is located, and all the light emitting units together complete the image display of the whole screen area, so that the light emission of a part or all of the areas can be controlled by controlling the light emitting units at different positions.
In this embodiment, if the partial area of the display panel is controlled to emit light, the area corresponding to the touch position of the touch operation in the display panel of the display screen can be controlled to emit light, so that the energy consumption is reduced while the enough light emitting area is ensured.
It should be understood that, after the fingerprint calculation module 93 calculates the fingerprint corresponding to the touch operation, the fingerprint recognition device may match the calculated fingerprint with a pre-stored fingerprint template, and if so, may perform the next operation, such as unlocking the screen. If the fingerprints are not matched, the user can be prompted that the fingerprints are input incorrectly and the fingerprints need to be input again.
According to the fingerprint identification device provided by the embodiment of the disclosure, through the photoelectric sensing units arranged on the glass cover plate, the photoelectric sensing units trigger the photoelectric effect to generate current by utilizing the reflected light generated when a user touches the device, and then the fingerprint of the user touches the device is calculated according to the generated current and the positions of the photoelectric sensing units generating the current, so that the identification of the fingerprint under the screen is effectively realized, and a new display identification mode is provided for the fingerprint identification under the screen.
Embodiment four:
the present embodiments provide a storage medium including volatile or nonvolatile, removable or non-removable media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, computer program modules or other data. Storage media includes, but is not limited to, RAM (Random Access Memory ), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory, charged erasable programmable Read-Only Memory), flash Memory or other Memory technology, CD-ROM (Compact Disc Read-Only Memory), digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.
The storage medium provided in this embodiment stores computer executable instructions executable by one or more processors to implement the steps of the fingerprint identification method described in the first and/or second embodiments. And will not be described in detail herein.
It will be apparent to one skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the apparatus disclosed above may be implemented as software (which may be implemented in computer program code executable by a computing apparatus), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.
Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and may include any information delivery media. Therefore, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a further detailed description of embodiments of the invention in connection with the specific embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (11)
1. A glass cover sheet comprising: a glass cover plate body and a plurality of receiving units arranged on the glass cover plate body; the size of each receiving unit is matched with the sizes of fingerprint ridge lines and fingerprint valley lines;
the receiving unit comprises a photoelectric sensing unit sensitive to photoelectric effect and a current transmission circuit with one end connected to the photoelectric sensing unit; the other end of the current transmission circuit is connected with a signal processing module of the terminal so as to transmit a current signal of the photoelectric sensing unit to the signal processing module for processing;
the photoelectric sensing unit is a metal wire, and the metal wire is a metal wire which can generate photoelectric effect in the visible light frequency range;
wherein the matching of the size of the receiving units with the sizes of the fingerprint ridge lines and the fingerprint valley lines comprises: the length of the metal wire of each receiving unit is smaller than or equal to the width of the fingerprint ridge line and the fingerprint valley line.
2. The glass cover of claim 1, wherein the size of each of the receiving units matches the size of the fingerprint ridge and fingerprint valley comprises:
the wire diameter of each receiving unit is less than 100 microns.
3. The glass cover plate of claim 2, wherein a distance between two adjacent wires is greater than 100 microns.
4. The glass cover plate of claim 1, wherein the current transfer circuit has a diameter of less than 100 microns.
5. The glass cover plate according to claim 1, wherein each receiving unit is specifically disposed on a protection surface of the glass cover plate body; the protection surface is the surface of the glass cover plate facing the display panel in the display screen.
6. The glass cover sheet of any one of claims 1-5, wherein the photo-sensing unit is covered with a light shielding coating on a side facing a display panel in the display screen.
7. A terminal, comprising: a display screen and a signal processing module; the display screen comprising a glass cover plate as defined in any one of claims 1-5; the photoelectric sensing unit in the glass cover plate is connected with the signal processing module through a current transmission circuit.
8. A fingerprint identification method applied to the terminal as claimed in claim 7, comprising:
when a touch operation on a display screen is detected, controlling a display panel of the display screen to emit light;
receiving current signals generated by all photoelectric sensing units; the photoelectric sensing unit is arranged on a glass cover plate of the display screen; the current signal triggers the photoelectric effect to generate after the photoelectric sensing unit receives the reflected light of the light emitted by the display panel;
and calculating fingerprints corresponding to the touch operation according to the current signals generated by the photoelectric sensing units and the position information of the photoelectric sensing units.
9. The fingerprint recognition method of claim 8, wherein controlling the display panel of the display screen to emit light comprises:
and controlling the display panel of the display screen to emit light in an area corresponding to the touch position of the touch operation.
10. A fingerprint recognition device, comprising:
the control module is used for controlling the display panel of the display screen to emit light when the touch operation acted on the display screen is detected; wherein the display screen comprises a glass cover plate as defined in any one of claims 1-5;
the receiving module is used for receiving the current signals generated by the photoelectric sensing units; the photoelectric sensing unit is arranged on a glass cover plate of the display screen; the current signal triggers the photoelectric effect to generate after the photoelectric sensing unit receives the reflected light of the light emitted by the display panel;
and the fingerprint calculation module is used for calculating fingerprints corresponding to the touch operation according to the current signals generated by the photoelectric sensing units and the position information of the photoelectric sensing units.
11. A storage medium having stored therein computer executable instructions for performing the fingerprint identification method of claim 8 or 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770727.6A CN110717364B (en) | 2018-07-13 | 2018-07-13 | Glass cover plate, terminal, fingerprint identification method, fingerprint identification device and storage medium |
| PCT/CN2018/109561 WO2020010732A1 (en) | 2018-07-13 | 2018-10-10 | Glass cover plate, terminal, fingerprint recognition method and apparatus, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810770727.6A CN110717364B (en) | 2018-07-13 | 2018-07-13 | Glass cover plate, terminal, fingerprint identification method, fingerprint identification device and storage medium |
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| CN110717364A CN110717364A (en) | 2020-01-21 |
| CN110717364B true CN110717364B (en) | 2023-09-22 |
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| WO2020010732A1 (en) | 2020-01-16 |
| CN110717364A (en) | 2020-01-21 |
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