CN107256391B - LCD panel, LCM, fingerprint identification method, fingerprint identification device and storage medium - Google Patents
LCD panel, LCM, fingerprint identification method, fingerprint identification device and storage medium Download PDFInfo
- Publication number
- CN107256391B CN107256391B CN201710405301.6A CN201710405301A CN107256391B CN 107256391 B CN107256391 B CN 107256391B CN 201710405301 A CN201710405301 A CN 201710405301A CN 107256391 B CN107256391 B CN 107256391B
- Authority
- CN
- China
- Prior art keywords
- infrared light
- reflected light
- detectors
- infrared
- detected
- 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.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The disclosure relates to an LCD panel, an LCM, a fingerprint identification method, a fingerprint identification device and a storage medium, and belongs to the technical field of electronics. The LCD panel includes: a backlight including an infrared lamp for emitting infrared light; and a CF layer including a plurality of filters; the infrared light detection unit comprises an infrared light detection array, the infrared light detection array comprises a plurality of infrared light detectors, and the infrared light detectors are used for detecting infrared light; wherein at least a portion of an orthographic projection of the infrared light detection array on the plane of the CF layer falls within the CF layer. In the present disclosure, fingerprint identification can be performed only through the display area of the LCD panel, so that the area occupied by the screen on the LCD panel is increased, the screen occupation ratio is increased, and the display performance is improved.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to an LCD (Liquid Crystal Display) panel, an LCM (Liquid Crystal Display Module), a fingerprint identification method, an apparatus, and a storage medium.
Background
Because fingerprints have lifetime invariance and uniqueness, and fingerprints of different users are different, along with the continuous development of electronic technology, in order to ensure the security of user identity, the fingerprint identification technology is more and more widely applied, for example, the fingerprint identification technology can be used in situations requiring identity verification, such as bank payment, application unlocking and the like.
Currently, a terminal generally performs fingerprint recognition through a physical key in a panel, and a sensor for performing fingerprint recognition may be configured in the physical key to recognize a fingerprint of a user.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides an LCD panel, an LCM, a fingerprint recognition method, an apparatus, and a storage medium.
According to a first aspect of embodiments of the present disclosure, there is provided an LCD panel including:
a backlight including an infrared lamp for emitting infrared light; and the number of the first and second groups,
a color filter CF layer including a plurality of filters; and the number of the first and second groups,
an infrared light detection unit including an infrared light detection array including a plurality of infrared light detectors each for detecting infrared light;
wherein at least a portion of an orthographic projection of the infrared light detection array on the plane of the CF layer falls within the CF layer.
Optionally, the plurality of infrared light detectors are located on the black matrix between the plurality of filters.
Optionally, the LCD panel further comprises a glass cover plate, wherein the plurality of infrared light detectors are located between the glass cover plate and the CF layer.
Optionally, the infrared light detection unit is configured to form part of a detection circuit for an infrared light biometric sensor.
Optionally, the infrared light biometric sensor is a fingerprint sensor or a palm print sensor.
Optionally, the fingerprint sensor is configured to identify fingerprints from at least two fingers simultaneously.
According to a second aspect of the embodiments of the present disclosure, a liquid crystal display module LCM is provided, wherein the LCM includes the LCD panel and the driving circuit of the first aspect;
the drive circuit is configured to:
when a touch operation for fingerprint identification is detected, emitting infrared light through the infrared lamp;
detecting reflected light of the infrared light by the plurality of infrared light detectors;
determining a fingerprint image based on the positions of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect reflected light, and the intensities of the detected reflected light.
Optionally, the drive circuit is configured to:
determining first reflected light and second reflected light from the reflected light detected by the plurality of infrared light detectors, the first reflected light being the reflected light detected within a first preset time period, the second reflected light being the reflected light detected within a second preset time period;
determining a location of a ridge of an epidermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the first reflected light detected by the plurality of infrared light detectors;
determining a location of a ridge of a dermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the second reflected light detected by the plurality of infrared light detectors.
According to a third aspect of the embodiments of the present disclosure, there is provided a fingerprint identification method applied to a terminal mounted with the LCD panel of the first aspect, the method including:
when a touch operation for fingerprint identification is detected, emitting infrared light through the infrared lamp;
detecting reflected light of the infrared light by the plurality of infrared light detectors;
determining a fingerprint image based on the positions of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect reflected light, and the intensities of the detected reflected light.
Optionally, the determining a fingerprint image based on the positions of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect the reflected light, and the intensities of the detected reflected light, comprises:
determining first reflected light and second reflected light from the reflected light detected by the plurality of infrared light detectors, the first reflected light being the reflected light detected within a first preset time period, the second reflected light being the reflected light detected within a second preset time period;
determining a location of a ridge of an epidermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the first reflected light detected by the plurality of infrared light detectors;
determining a location of a ridge of a dermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the second reflected light detected by the plurality of infrared light detectors.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a fingerprint recognition device having the LCD panel of the first aspect mounted thereon, the device including:
a transmitting module for transmitting infrared light through the infrared light lamp when detecting a touch operation for fingerprint identification,
a detection module for detecting reflected light of the infrared light by the plurality of infrared light detectors;
a determination module to determine a fingerprint image based on the locations of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect the reflected light, and the intensities of the detected reflected light.
Optionally, the determining module includes:
a first determination sub-module configured to determine, from the reflected lights detected by the plurality of infrared light detectors, a first reflected light that is the reflected light detected within a first preset time period and a second reflected light that is the reflected light detected within a second preset time period;
a second determination sub-module for determining a ridge position of an epidermis layer in the fingerprint image based on positions of the plurality of infrared light detectors and intensities of first reflected light detected by the plurality of infrared light detectors;
a third determining sub-module for determining a location of a streak line of the dermis layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the second reflected light detected by the plurality of infrared light detectors.
According to a fifth aspect of the embodiments of the present disclosure, there is provided a fingerprint identification device, the device including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the steps of the method of the third aspect.
According to a sixth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the method according to the third aspect.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the LCD panel includes a backlight, a CF layer, and an infrared light detecting unit. Because the infrared light detection array that infrared light detecting element includes is located the display area of this LCD panel, therefore, the terminal of installing this LCD panel is when carrying out the discernment of hand prints such as fingerprint, palm print, need not to increase extra physical button on this LCD panel and discern, but can directly discern through the infrared light detection array that is located the display area of this LCD panel, thereby can avoid the extra occupation of physical button to this LCD panel, increase the area that the screen occupies on this LCD panel, and then increased the screen proportion of occupying at terminal, the display performance at terminal has been improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram illustrating a first LCD panel according to an exemplary embodiment.
Fig. 2 is a schematic diagram of a backlight according to an exemplary embodiment.
Fig. 3 is a schematic diagram illustrating a structure of a CF layer according to an example embodiment.
Fig. 4 is a schematic structural diagram illustrating an infrared light detecting unit according to an exemplary embodiment.
Fig. 5A is a schematic structural diagram illustrating a second LCD panel according to an exemplary embodiment.
Fig. 5B is a schematic structural diagram illustrating a third LCD panel according to an exemplary embodiment.
Fig. 6 is a schematic diagram illustrating a structure of an LCM according to an exemplary embodiment.
FIG. 7 is a flow chart illustrating a method of fingerprinting in accordance with an exemplary embodiment.
FIG. 8 is a block diagram illustrating a fingerprint recognition device according to an example embodiment.
FIG. 9 is a block diagram illustrating another fingerprint recognition device according to an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Before explaining the embodiments of the present disclosure in detail, an application scenario of the embodiments of the present disclosure will be explained. In order to ensure the security of the user identity, the fingerprint identification technology has been widely applied to the situations that the bank payment, the application unlocking and the like need to be authenticated. Currently, a terminal generally performs fingerprint recognition through a physical key in a panel, and a sensor for performing fingerprint recognition may be configured in the physical key to recognize a fingerprint of a user. In order to facilitate the user to press the fingerprint and to be able to identify the fingerprint more accurately, the size of the physical key is often larger. At the moment, the area occupied by the physical key on the panel is larger, and the area occupied by the screen on the panel is smaller, so that the screen occupation ratio of the terminal is smaller, and the display performance of the terminal is lower. Therefore, the embodiment of the present disclosure provides an LCD panel to increase the screen ratio of the terminal and improve the display performance of the terminal.
Fig. 1 is a schematic structural diagram illustrating an LCD panel according to an exemplary embodiment. Referring to fig. 1, the LCD panel includes: a backlight 1, a CF layer 2 and an infrared light detection unit 3;
therein, see fig. 2, a backlight 1 comprising an infrared lamp 11 for emitting infrared light;
among them, referring to fig. 3, the CF layer 2, which includes a plurality of filters 21;
referring to fig. 4, the infrared light detection unit 3 includes an infrared light detection array 31, the infrared light detection array 31 includes a plurality of infrared light detectors 311, and each of the plurality of infrared light detectors 311 is configured to detect infrared light;
wherein at least a part of the orthographic projection of the infrared light detection array 31 on the plane of the CF layer 2 falls within the CF layer 2.
It should be noted that the backlight 1 is used to provide sufficient brightness and uniformly distributed planar light source for the LCD panel, so that the LCD panel can normally display images. Since each component in the LCD panel has a high transmittance for infrared Light, the infrared Light emitted by the infrared lamp 11 in the backlight 1 can smoothly penetrate through the LCD panel to reach a finger, and the infrared lamp 11 can be a Light Emitting Diode (LED) infrared lamp, such as a 940nm (nanometer) LED lamp.
In addition, the CF layer 2 is used to display a screen, and light incident into the CF layer 2 can be converted and mixed into light of different colors through the plurality of filters 21 in the CF layer 2, thereby forming various screens.
Note that, for each of the plurality of infrared light detectors 311, the infrared light detector may detect infrared light by a corresponding TFT (Thin Film Transistor). For example, a voltage may be applied to a gate of a TFT corresponding to the infrared light detector to turn on the TFT; after the TFT is turned on, a voltage is applied to the source of the TFT so that the infrared light detector can detect infrared light.
In addition, in order to ensure the accuracy of identifying hand prints such as fingerprints and palm prints, the size of each of the plurality of infrared light detectors 311 may be set to be small, for example, the same size as the plurality of filters 21, or may be set to be small, for example, 40 micrometers or 50 micrometers.
Furthermore, the plurality of infrared photodetectors 311 may be made of a semiconductor material having a high transmittance for visible light and being sensitive to infrared light, for example, the semiconductor material may be nano silver, and the embodiment of the disclosure does not limit this.
It should be noted that, when at least a part of the orthographic projection of the infrared light detection array 31 on the plane where the CF layer 2 is located falls within the CF layer 2, both the infrared light detection array 31 and the CF layer 2 are located in the same area of the LCD panel. Since the CF layer 2 is located in the display area of the LCD panel for displaying a screen, the infrared light detection arrays 31 are also located in the display area of the LCD panel.
Install the terminal of this LCD panel when carrying out the discernment of hand marks such as fingerprint, palm print, need not to increase extra physical button on this LCD panel and discern, but can directly discern through the infrared light detection array 31 that is located the display area of this LCD panel, thereby can avoid the extra of physical button to this LCD panel to occupy, increase the area that the screen occupies on this LCD panel, and then increased the screen of terminal and occupied the ratio, the display performance at terminal has been improved.
It is noted that the infrared light detection unit 3 is configured to form part of a detection circuit for an infrared light biometric sensor. The infrared light detection unit 3 can detect the biometric feature by infrared light, such as detecting a fingerprint, a palm print, and the like.
The infrared light biometric sensor is used for identifying biological characteristics through infrared light, and for example, the infrared light biometric sensor can be a fingerprint sensor, a palm print sensor and the like. And when the infrared light biometric sensor is a fingerprint sensor, since the infrared light detection array 31 is located within the display area of the LCD panel, and the display area of the LCD panel is generally large, the fingerprint sensor may be configured to recognize fingerprints from at least two fingers at the same time.
The position of the infrared light detection array 31 included in the infrared light detection unit 3 will be explained below.
Referring to fig. 5A, infrared light detection array 31 includes a plurality of infrared light detectors 311 on a black matrix between a plurality of filters 21; alternatively, referring to fig. 5B, the LCD panel further includes a glass cover plate 4, wherein the plurality of infrared light detectors 311 are located between the glass cover plate 4 and the CF layer 2.
When the plurality of infrared light detectors 311 are disposed on the black matrix between the plurality of filters 21, the plurality of infrared light detectors 311 may be added individually or may be disposed in an original protective layer on the black matrix, and the protective layer is used to prevent impurities such as water and oxygen from oxidizing the CF layer 2.
In addition, when the plurality of infrared light detectors 311 are located between the glass cover plate 4 and the CF layer 2, the plurality of infrared light detectors 311 may be added separately, or may replace an original protection layer between the glass cover plate 4 and the CF layer 2, where the protection layer is an original protection layer on the black matrix. At this time, the plurality of infrared light detectors 311 may cover the entire area of the CF layer 2, or may cover a partial area of the CF layer 2, which is not limited in the embodiment of the present disclosure.
In an embodiment of the present disclosure, an LCD panel includes a backlight, a CF layer, and an infrared light detection unit. Because the infrared light detection array that infrared light detecting element includes is located the display area of this LCD panel, therefore, the terminal of installing this LCD panel is when carrying out the discernment of hand prints such as fingerprint, palm print, need not to increase extra physical button on this LCD panel and discern, but can directly discern through the infrared light detection array that is located the display area of this LCD panel, thereby can avoid the extra occupation of physical button to this LCD panel, increase the area that the screen occupies on this LCD panel, and then increased the screen proportion of occupying at terminal, the display performance at terminal has been improved.
Fig. 6 is a schematic diagram illustrating a structure of an LCM according to an exemplary embodiment. Referring to fig. 6, the LCM includes the LCD panel 61 and the driving circuit 62 shown in any one of fig. 1 to 5B described above;
the drive circuit 62 is configured to:
when a touch operation for fingerprint identification is detected, infrared light is emitted through the infrared lamp; detecting reflected light of the infrared light by the plurality of infrared light detectors; a fingerprint image is determined based on the positions of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect reflected light, and the intensities of the detected reflected light.
When a touch operation for fingerprint recognition is detected, it indicates that the user's finger is in close proximity to the LCD panel, so fingerprint recognition can be performed based on the infrared lamp in the backlight and the plurality of infrared light detectors at this time. Since the epidermis layer and the dermis layer of the finger have different reflection times of the infrared light and the infrared light forms reflected light with different intensities after being reflected at the respective striae of the epidermis layer and the dermis layer of the finger, the positions of the striae of the epidermis layer and the dermis layer in the fingerprint image can be determined based on the time when the plurality of infrared light detectors detect the reflected light and the detected intensity of the reflected light. After the positions of the lines of the epidermis layer and the dermis layer in the fingerprint image are determined, the fingerprint image is obtained.
In addition, when only the positions of the streaks of the epidermis layer are determined, the resulting fingerprint image is a 2D (2 Dimensions) image. When not only the position of the streak line of the epidermis layer but also the position of the streak line of the dermis layer is determined, the obtained fingerprint image is a 3D (3 Dimensions) image.
Optionally, the drive circuit is configured to:
determining first reflected light and second reflected light from the reflected light detected by the plurality of infrared light detectors, the first reflected light being the reflected light detected within a first preset time period, the second reflected light being the reflected light detected within a second preset time period; determining a location of a ridge of an epidermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the first reflected light detected by the plurality of infrared light detectors; based on the locations of the plurality of infrared light detectors and the intensities of the second reflected light detected by the plurality of infrared light detectors, the locations of the striae of the dermal layer in the fingerprint image are determined.
It should be noted that, both the first preset time period and the second preset time period may be preset, which is not limited in the embodiment of the present disclosure.
In addition, when the first reflected light is reflected light detected within the first preset time period, it is indicated that the first reflected light is reflected light formed after the skin layer reflects the infrared light, and therefore, at this time, the ridge position of the skin layer in the fingerprint image can be determined based on the intensity of the first reflected light detected by the plurality of infrared light detectors.
Furthermore, when the second reflected light is the reflected light detected within the second preset time period, it indicates that the second reflected light is the reflected light formed after the infrared light is reflected by the dermis, so that the position of the streak line of the dermis in the fingerprint image can be determined based on the intensity of the second reflected light detected by the plurality of infrared light detectors at this time.
In practical applications, in order to improve the detection accuracy, when a certain fingerprint is identified, the infrared light may be emitted by the infrared lamp in the backlight source for a long time, or the infrared light may be emitted by the infrared lamp for multiple times. And the operation of emitting infrared light for many times by the infrared lamp can be realized by a PWM (Pulse width modulation) technique, which is not described in detail in the embodiments of the present disclosure.
Wherein, if the infrared light is emitted only once by the infrared lamp, when the position of the ridge of the epidermis layer in the fingerprint image is determined based on the positions of the plurality of infrared light detection detectors and the intensity of the first reflected light detected by the plurality of infrared light detectors, for each of the plurality of infrared light detectors, a target ridge may be acquired from the stored correspondence between the intensity of the reflected light and the ridge of the epidermis layer based on the intensity of the first reflected light detected this time by the infrared light detector, and it may be determined that the position of the infrared light detector corresponds to the position of the target ridge of the epidermis layer in the fingerprint image.
Wherein, when determining the position of the ridge of the epidermis layer in the fingerprint image based on the intensities of the first reflected light detected by the plurality of infrared light detectors if infrared light is emitted a plurality of times by the infrared lamp, for each of the plurality of infrared light detectors, a target ridge may be acquired from the stored correspondence between the intensity of the reflected light and the ridge of the epidermis layer based on the average intensity of the first reflected light detected by the infrared light detector a plurality of times, and it may be determined that the position of the infrared light detector corresponds to the position of the target ridge of the epidermis layer in the fingerprint image.
The operation of determining the position of the streak line of the dermal layer in the fingerprint image based on the positions of the plurality of infrared light detectors and the intensities of the second reflected lights detected by the plurality of infrared light detectors is similar to the operation of determining the position of the streak line of the epidermal layer in the fingerprint image based on the positions of the plurality of infrared light detectors and the intensities of the first reflected lights detected by the plurality of infrared light detectors, and details of the embodiment of the disclosure are omitted here.
In the embodiment of the present disclosure, when the driving circuit detects a touch operation for fingerprint recognition, the driving circuit may emit infrared light through an infrared lamp included in the LCD panel and detect reflected light of the infrared light emitted from the infrared lamp through a plurality of infrared light detectors included in the LCD panel. Thereafter, a fingerprint image is determined based on the positions of the plurality of infrared light detectors and the times at which the plurality of infrared light detectors detect reflected light and the intensity of the detected reflected light. According to the embodiment of the fingerprint identification device, additional physical keys do not need to be added on the LCD panel, fingerprint identification can be carried out only through the plurality of infrared lamp detectors located in the display area of the LCD panel, so that additional occupation of the physical keys on the LCD panel is avoided, the occupied area of a screen on the LCD panel is increased, the screen occupation ratio is increased, and the display performance is improved.
Fig. 7 is a flowchart illustrating a fingerprint recognition method according to an exemplary embodiment, which is applied to a terminal mounted with the LCD panel shown in any one of fig. 1 to 5B described above. Referring to fig. 7, the method includes the following steps.
In step 701, when a touch operation for fingerprint recognition is detected, infrared light is emitted by an infrared lamp in a backlight.
When a touch operation for fingerprint recognition is detected, it is indicated that the user's finger is approaching the LCD panel, so infrared light can be emitted by an infrared lamp in the backlight at this time, and fingerprint recognition is performed based on a plurality of infrared light detectors in a subsequent step.
In step 702, reflected light of the infrared light emitted by the infrared lamp is detected by a plurality of infrared light detectors.
In step 703, a fingerprint image is determined based on the positions of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect reflected light, and the intensities of the detected reflected light.
Since the epidermis layer and the dermis layer of the finger have different reflection times of the infrared light and the infrared light forms reflected light with different intensities after being reflected at the respective striae of the epidermis layer and the dermis layer of the finger, the positions of the striae of the epidermis layer and the dermis layer in the fingerprint image can be determined based on the time when the plurality of infrared light detectors detect the reflected light and the detected intensity of the reflected light. After the positions of the lines of the epidermis layer and the dermis layer in the fingerprint image are determined, the fingerprint image is obtained.
In addition, when only the streak line position of the epidermis layer is determined, the resulting fingerprint image is a 2D image. And when the positions of the striae of the epidermis layer and the dermis layer are determined, the obtained fingerprint image is a 3D image.
Wherein, when determining the fingerprint image, based on the positions of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect reflected light, and the intensities of the detected reflected light, first reflected light and second reflected light may be determined from the reflected light detected by the plurality of infrared light detectors, the first reflected light being the reflected light detected within a first preset time period, the second reflected light being the reflected light detected within a second preset time period; determining a location of a ridge of an epidermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the first reflected light detected by the plurality of infrared light detectors; based on the locations of the plurality of infrared light detectors and the intensities of the second reflected light detected by the plurality of infrared light detectors, the location of the striae of the dermal layer in the fingerprint image is determined.
It should be noted that, both the first preset time period and the second preset time period may be preset, which is not limited in the embodiment of the present disclosure.
In addition, when the first reflected light is reflected light detected within the first preset time period, it is indicated that the first reflected light is reflected light formed after the skin layer reflects the infrared light, and therefore, at this time, the ridge position of the skin layer in the fingerprint image can be determined based on the intensity of the first reflected light detected by the plurality of infrared light detectors.
Furthermore, when the second reflected light is the reflected light detected within the second preset time period, it indicates that the second reflected light is the reflected light formed after the infrared light is reflected by the dermis, so that the position of the streak line of the dermis in the fingerprint image can be determined based on the intensity of the second reflected light detected by the plurality of infrared light detectors at this time.
In practical application, in order to improve the detection accuracy, when the terminal performs fingerprint identification for a certain time, the infrared light in the backlight source may be continuously emitted for a long time, or the infrared light may be emitted for multiple times by the infrared lamp. And the operation of emitting infrared light multiple times by the infrared lamp may be realized by a PWM technique, which is not described in detail in the embodiments of the present disclosure.
When the position of the ridge of the epidermis layer in the fingerprint image is determined based on the positions of the plurality of infrared light detectors and the intensity of the first reflected light detected by the plurality of infrared light detectors if the terminal emits infrared light only once through the infrared lamp, for each infrared light detector in the plurality of infrared light detectors, the target ridge can be obtained from the stored corresponding relationship between the reflected light intensity and the skin layer ridge based on the intensity of the first reflected light detected by the infrared light detector this time, and the position of the infrared light detector corresponding to the position of the target ridge of the epidermis layer in the fingerprint image is determined.
Wherein, if the terminal emits infrared light through the infrared lamp a plurality of times, when determining a position of a ridge of the epidermis layer in the fingerprint image based on the intensity of the first reflected light detected by the plurality of infrared light detectors, for each of the plurality of infrared light detectors, a target ridge may be acquired from the stored correspondence between the intensity of the reflected light and the ridge of the epidermis layer based on the average intensity of the first reflected light detected by the infrared light detector a plurality of times, and it may be determined that the position of the infrared light detector corresponds to the position of the target ridge of the epidermis layer in the fingerprint image.
The operation of determining the position of the streak line of the dermal layer in the fingerprint image based on the positions of the plurality of infrared light detectors and the intensities of the second reflected lights detected by the plurality of infrared light detectors is similar to the operation of determining the position of the streak line of the epidermal layer in the fingerprint image based on the positions of the plurality of infrared light detectors and the intensities of the first reflected lights detected by the plurality of infrared light detectors, and details of the embodiment of the disclosure are omitted here.
In the embodiment of the present disclosure, when the terminal detects a touch operation for fingerprint recognition, the terminal may emit infrared light through an infrared lamp included in an LCD panel mounted thereto, and detect reflected light of the infrared light emitted from the infrared lamp through a plurality of infrared light detectors included in the LCD panel. Thereafter, a fingerprint image is determined based on the positions of the plurality of infrared light detectors and the times at which the plurality of infrared light detectors detect reflected light and the intensity of the detected reflected light. According to the terminal, extra physical keys do not need to be added on the LCD panel, fingerprint identification can be carried out only through the plurality of infrared lamp detectors located in the display area of the LCD panel, so that extra occupation of the physical keys on the LCD panel is avoided, the occupied area of a screen on the LCD panel is increased, the screen occupation ratio of the terminal is increased, and the display performance of the terminal is improved.
Fig. 8 is a block diagram illustrating a fingerprint recognition device according to an exemplary embodiment, which is mounted with the LCD panel shown in any one of fig. 1-5B described above. Referring to fig. 8, the apparatus includes a transmitting module 801, a detecting module 802, and a determining module 803.
A transmitting module 801 configured to transmit infrared light through an infrared lamp when a touch operation for fingerprint recognition is detected;
a detection module 802 for detecting reflected light of infrared light by a plurality of infrared light detectors;
a determining module 803, configured to determine a fingerprint image based on the positions of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect the reflected light, and the intensities of the detected reflected light.
Optionally, the determining module 803 includes:
a first determination sub-module configured to determine first reflected light and second reflected light from the reflected light detected by the plurality of infrared light detectors, the first reflected light being the reflected light detected within a first preset time period, the second reflected light being the reflected light detected within a second preset time period;
a second determination sub-module for determining a ridge position of the epidermis layer in the fingerprint image based on positions of the plurality of infrared light detectors and intensities of the first reflected light detected by the plurality of infrared light detectors;
and the third determining sub-module is used for determining the positions of the striae of the dermis layer in the fingerprint image based on the positions of the plurality of infrared light detectors and the intensity of the second reflected light detected by the plurality of infrared light detectors.
In the embodiment of the present disclosure, when a touch operation for fingerprint recognition is detected, infrared light may be emitted by an infrared lamp included in an LCD panel mounted, and reflected light of the infrared light emitted by the infrared lamp is detected by a plurality of infrared light detectors included in the LCD panel. Thereafter, a fingerprint image is determined based on the positions of the plurality of infrared light detectors and the times at which the plurality of infrared light detectors detect reflected light and the intensity of the detected reflected light. According to the embodiment of the fingerprint identification device, additional physical keys do not need to be added on the LCD panel, fingerprint identification can be carried out only through the plurality of infrared lamp detectors located in the display area of the LCD panel, so that additional occupation of the physical keys on the LCD panel is avoided, the occupied area of a screen on the LCD panel is increased, the screen occupation ratio is increased, and the display performance is improved.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 9 is a block diagram illustrating a fingerprint recognition device 900 according to an exemplary embodiment, the device 900 being mounted with an LCD panel as described above with reference to any of fig. 1-5B. For example, the apparatus 900 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 9, apparatus 900 may include one or more of the following components: processing component 902, memory 904, power component 906, multimedia component 908, audio component 910, input/output (I/O) interface 912, sensor component 914, and communication component 916.
The processing component 902 generally controls overall operation of the device 900, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processing component 902 may include one or more processors 920 to execute instructions to perform all or a portion of the steps of the methods described above. Further, processing component 902 can include one or more modules that facilitate interaction between processing component 902 and other components. For example, the processing component 902 can include a multimedia module to facilitate interaction between the multimedia component 908 and the processing component 902.
The memory 904 is configured to store various types of data to support operation at the apparatus 900. Examples of such data include instructions for any application or method operating on device 900, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 904 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 906 provides power to the various components of the device 900. The power components 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power supplies for the device 900.
The multimedia component 908 comprises a screen providing an output interface between the device 900 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 908 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 900 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 910 is configured to output and/or input audio signals. For example, audio component 910 includes a Microphone (MIC) configured to receive external audio signals when apparatus 900 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 904 or transmitted via the communication component 916. In some embodiments, audio component 910 also includes a speaker for outputting audio signals.
I/O interface 912 provides an interface between processing component 902 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 914 includes one or more sensors for providing status assessment of various aspects of the apparatus 900. For example, sensor assembly 914 may detect an open/closed state of device 900, the relative positioning of components, such as a display and keypad of device 900, the change in position of device 900 or a component of device 900, the presence or absence of user contact with device 900, the orientation or acceleration/deceleration of device 900, and the change in temperature of device 900. The sensor assembly 914 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 914 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 914 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 916 is configured to facilitate communications between the apparatus 900 and other devices in a wired or wireless manner. The apparatus 900 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 916 receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 904 comprising instructions, executable by the processor 920 of the apparatus 900 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
A non-transitory computer readable storage medium, wherein instructions, when executed by a processor of a terminal, enable the terminal to perform the fingerprint identification method provided by the embodiment of fig. 7 described above.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The liquid crystal display module LCM is characterized by comprising a Liquid Crystal Display (LCD) panel and a driving circuit;
the LCD panel includes:
a backlight including an infrared lamp for emitting infrared light; and the number of the first and second groups,
a color filter CF layer including a plurality of filters; and the number of the first and second groups,
an infrared light detection unit including an infrared light detection array including a plurality of infrared light detectors each for detecting infrared light;
wherein at least a part of the orthographic projection of the infrared detection array on the plane of the CF layer falls within the CF layer;
the drive circuit is configured to:
when a touch operation for fingerprint identification is detected, emitting infrared light through the infrared lamp;
detecting reflected light of the infrared light by the plurality of infrared light detectors;
determining first reflected light and second reflected light from the reflected light detected by the plurality of infrared light detectors, the first reflected light being the reflected light detected within a first preset time period, the second reflected light being the reflected light detected within a second preset time period;
determining a location of a ridge of an epidermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the first reflected light detected by the plurality of infrared light detectors;
determining a location of a ridge of a dermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the second reflected light detected by the plurality of infrared light detectors.
2. The LCM of claim 1, wherein the plurality of infrared light detectors are located on a black matrix between the plurality of filters.
3. The LCM of claim 1, wherein the LCD panel further comprises a glass cover plate, wherein the plurality of infrared detectors are located between the glass cover plate and the CF layer.
4. The LCM of any one of claims 1-3, wherein the infrared light detection unit is configured to form part of a detection circuit for an infrared light biometric sensor.
5. The LCM of claim 4, wherein the infrared light biometric sensor is a fingerprint sensor or a palm print sensor.
6. The LCM of claim 5, wherein the fingerprint sensor is configured to simultaneously recognize fingerprints from at least two fingers.
7. A fingerprint recognition method applied to a terminal on which the LCM of any one of claims 1 to 6 is installed, the method comprising:
when a touch operation for fingerprint identification is detected, emitting infrared light through the infrared lamp;
detecting reflected light of the infrared light by the plurality of infrared light detectors;
determining first reflected light and second reflected light from the reflected light detected by the plurality of infrared light detectors, the first reflected light being the reflected light detected within a first preset time period, the second reflected light being the reflected light detected within a second preset time period;
determining a location of a ridge of an epidermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the first reflected light detected by the plurality of infrared light detectors;
determining a location of a ridge of a dermal layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the second reflected light detected by the plurality of infrared light detectors.
8. A fingerprint recognition apparatus equipped with the LCM of any one of claims 1 to 6, the apparatus comprising:
a transmitting module for transmitting infrared light through the infrared light lamp when detecting a touch operation for fingerprint identification,
a detection module for detecting reflected light of the infrared light by the plurality of infrared light detectors;
a determination module for determining a fingerprint image based on the positions of the plurality of infrared light detectors, the times at which the plurality of infrared light detectors detect reflected light, and the intensities of the detected reflected light;
the determining module comprises:
a first determination sub-module configured to determine, from the reflected lights detected by the plurality of infrared light detectors, a first reflected light that is the reflected light detected within a first preset time period and a second reflected light that is the reflected light detected within a second preset time period;
a second determination sub-module for determining a ridge position of an epidermis layer in the fingerprint image based on positions of the plurality of infrared light detectors and intensities of first reflected light detected by the plurality of infrared light detectors;
a third determining sub-module for determining a location of a streak line of the dermis layer in the fingerprint image based on the locations of the plurality of infrared light detectors and the intensity of the second reflected light detected by the plurality of infrared light detectors.
9. A fingerprint recognition apparatus, the apparatus comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the steps of the method of claim 7.
10. A computer readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the method of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405301.6A CN107256391B (en) | 2017-05-31 | 2017-05-31 | LCD panel, LCM, fingerprint identification method, fingerprint identification device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405301.6A CN107256391B (en) | 2017-05-31 | 2017-05-31 | LCD panel, LCM, fingerprint identification method, fingerprint identification device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107256391A CN107256391A (en) | 2017-10-17 |
| CN107256391B true CN107256391B (en) | 2020-10-13 |
Family
ID=60022964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710405301.6A Active CN107256391B (en) | 2017-05-31 | 2017-05-31 | LCD panel, LCM, fingerprint identification method, fingerprint identification device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107256391B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11533180B1 (en) | 2017-11-28 | 2022-12-20 | Shanghai Harvest Intelligence Technology Co., Ltd. | Storage device and electronic device |
| CN109842491B (en) * | 2017-11-28 | 2021-08-24 | 上海耕岩智能科技有限公司 | Electronic equipment |
| CN108596080B (en) * | 2018-04-20 | 2021-05-14 | Oppo广东移动通信有限公司 | Fingerprint identification assembly, display device and electronic device |
| CN108615003B (en) * | 2018-04-20 | 2019-06-11 | Oppo广东移动通信有限公司 | Fingerprint recognition component, display device and electronic device |
| CN109313703B (en) * | 2018-08-15 | 2022-02-08 | 深圳市汇顶科技股份有限公司 | Optical fingerprint identification system under screen, backlight module, display screen and electronic equipment |
| CN109196522B (en) | 2018-08-24 | 2022-07-19 | 深圳市汇顶科技股份有限公司 | Backlight module, method and device for identifying fingerprints under screen and electronic equipment |
| WO2020087241A1 (en) * | 2018-10-30 | 2020-05-07 | 深圳市汇顶科技股份有限公司 | Under-screen optical fingerprint device and handheld device having three-dimensional fingerprint anti-counterfeit sensing function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231690A (en) * | 2002-05-09 | 2008-07-30 | 索尼株式会社 | Living-tissue pattern detecting method, living-tissue pattern detecting device, biometric authentication method, and biometric authentication device |
| CN105095887A (en) * | 2015-09-16 | 2015-11-25 | 京东方科技集团股份有限公司 | Fingerprint recognition module, fingerprint recognition method and display device |
| CN105378756A (en) * | 2013-07-16 | 2016-03-02 | 加利福尼亚大学董事会 | MUT fingerprint ID system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5292821B2 (en) * | 2008-01-16 | 2013-09-18 | ソニー株式会社 | Vein image acquisition device and vein image acquisition method |
| KR20110056892A (en) * | 2009-11-23 | 2011-05-31 | 삼성전자주식회사 | Multi touch detecting apparatus for lcd display unit and multi touch detecting method using the same |
| US9811711B2 (en) * | 2015-02-22 | 2017-11-07 | Microsoft Technology Licensing, Llc | Fingerprint detection with transparent cover |
| WO2016172713A1 (en) * | 2015-04-23 | 2016-10-27 | Shenzhen Huiding Technology Co., Ltd. | Multifunction fingerprint sensor |
| CN106295481A (en) * | 2015-06-10 | 2017-01-04 | 小米科技有限责任公司 | Palmmprint acquisition component, personal recognition assembly, cover plate and mobile device |
| CN106569358A (en) * | 2015-10-09 | 2017-04-19 | 小米科技有限责任公司 | Liquid crystal display assembly and electronic equipment |
| CN105334657B (en) * | 2015-11-26 | 2019-12-03 | 小米科技有限责任公司 | LCD assembly and electronic equipment |
| CN106067017A (en) * | 2016-07-22 | 2016-11-02 | 乐视控股（北京）有限公司 | fingerprint sensor and fingerprint identification method thereof |
| CN106372587A (en) * | 2016-08-29 | 2017-02-01 | 乐视控股（北京）有限公司 | Fingerprint identification method and device |
-
2017
- 2017-05-31 CN CN201710405301.6A patent/CN107256391B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231690A (en) * | 2002-05-09 | 2008-07-30 | 索尼株式会社 | Living-tissue pattern detecting method, living-tissue pattern detecting device, biometric authentication method, and biometric authentication device |
| CN105378756A (en) * | 2013-07-16 | 2016-03-02 | 加利福尼亚大学董事会 | MUT fingerprint ID system |
| CN105095887A (en) * | 2015-09-16 | 2015-11-25 | 京东方科技集团股份有限公司 | Fingerprint recognition module, fingerprint recognition method and display device |
Non-Patent Citations (3)
| Title |
|---|
| Design and fabrication of a cMUT probe for ultrasound imaging of fingerprints;A. Savoia 等，;《2010 IEEE International Ultrasonics Symposium》;20110630;第2011年卷;第1877-1880页 * |
| 不同波长近红外光下手掌静脉图像质量分析;李威 等，;《计算机工程与应用》;20111021;第47卷(第30期);第15-18页 * |
| 自动指纹识别技术发展与应用;陈继延，;《计算机光盘软件与应用》;20130803;第2013年卷(第9期);第56-57页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107256391A (en) | 2017-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107256391B (en) | LCD panel, LCM, fingerprint identification method, fingerprint identification device and storage medium | |
| EP3410491B1 (en) | Oled panel, oled module, fingerprint identification method and device thereof | |
| CN107273826B (en) | OLED panel | |
| US10797117B2 (en) | Organic light emitting diode display module and control method thereof | |
| US10942580B2 (en) | Input circuitry, terminal, and touch response method and device | |
| CN107195661B (en) | OLED panel | |
| CN107885361B (en) | Display device and electronic apparatus | |
| US20180159809A1 (en) | Method and device for message reading | |
| CN106529513A (en) | Color filter substrate, display module and electronic equipment | |
| CN111241890B (en) | Fingerprint identification method, device, equipment and storage medium | |
| US20170116451A1 (en) | Terminal device with function of fingerprint identification | |
| CN108595935B (en) | Fingerprint unlocking method and device | |
| CN106778624A (en) | Color membrane substrates, display module and electronic equipment | |
| CN106919914B (en) | Display module and electronic equipment | |
| CN108898126B (en) | Fingerprint identification method and device | |
| CN112764659B (en) | Information processing method and device, electronic device and storage medium | |
| CN107153448B (en) | Display module, control method thereof, electronic device and computer-readable storage medium | |
| CN110765813B (en) | Fingerprint identification method and device | |
| CN108681716B (en) | Fingerprint unlocking method and device | |
| CN108319899B (en) | Fingerprint identification method and device | |
| CN111222384B (en) | Terminal | |
| CN108334762B (en) | Terminal unlocking method and device | |
| CN107506630B (en) | Equipment with iris recognition function and iris recognition method | |
| CN112016372A (en) | Fingerprint detection module, fingerprint detection method and device | |
| CN112016541A (en) | Electronic equipment and fingerprint identification image acquisition method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |