Display deviceTechnical Field
The invention relates to the technical field of display equipment, in particular to a display device.
Background
Along with the popularization of a full-face screen in the production of smart phones, the position of a fingerprint identification sensor is flexibly arranged, the fingerprint sensor is placed on the side face of a mobile phone by a mobile phone, but most of mobile phones still arrange the fingerprint identification sensor on the back face of the mobile phone and adopt the fingerprint sensor provided by a special fingerprint sensor manufacturer, and the 'burdensome object' needs to occupy a certain space. Moreover, if the fingerprint sensor is fixed at a specific position, it is difficult and inconvenient to operate, particularly with one hand.
Although some mobile phones employ the optical fingerprint sensor on the display screen, the optical fingerprint sensor is mainly applied to the organic electroluminescent display screen, and the liquid crystal display cannot be used due to the need of backlight. It is necessary to further develop the capacitive fingerprint sensor. However, when the capacitive fingerprint sensor is applied to an organic electroluminescent display screen, due to the existence of the whole cathode material, certain influence is generated on the formed capacitance during fingerprint identification, so that the captured fingerprint information is inaccurate and the resolution ratio is low.
Disclosure of Invention
The invention provides a display device, which integrates a sensing module for capturing fingerprints into a fingerprint sensing area of a flexible display screen, saves the installation space, enlarges the area of an effective display area, has high sensitivity and resolution and is convenient for fingerprint unlocking operation.
In order to achieve the purpose, the invention provides the following technical scheme:
a display device comprises a shell and a flexible display screen installed on the shell, wherein the flexible display screen forms an effective display area and at least one fingerprint sensing area located on the periphery of the effective display area, each fingerprint sensing area of the flexible display screen is integrated with a sensing module used for capturing fingerprint information, and the fingerprint sensing area can be folded to the side face of the shell or the face deviating from the flexible display screen.
Among the above-mentioned display device, including the shell, install the flexible display screen on the shell, the flexible display screen forms effective display area and is located the peripheral at least one fingerprint sensing area of effective display area, and every fingerprint sensing area integration of flexible display screen has the sensing module that is used for catching fingerprint information, and fingerprint sensing area collapsible to the side of shell or the one side that deviates from the flexible display screen. The display device is provided with the fingerprint sensing area integrated with the sensing module at the periphery of the effective display area of the flexible display screen, and a fingerprint sensor is not required to be specially arranged, so that the installation space is saved, and the area of the effective display area is enlarged; the sensing module is not positioned in the effective display area, is not influenced by cathode materials, and has high sensitivity and resolution; the fingerprint sensing area can be set up in the peripheral different regions of effective display area, and the one side that can fold to the shell or deviate from flexible display screen makes things convenient for fingerprint unblock operation.
Preferably, two fingerprint sensing areas are formed on the flexible display screen, and the two fingerprint sensing areas are respectively located at two opposite edges of the effective display area of the display screen.
Preferably, the method further comprises the following steps: the device comprises a control module, a data processing module, a storage module and a reading module; wherein,
the control module is used for controlling the sensing module to capture fingerprint information of a finger contacting the fingerprint sensing region;
the storage module is used for storing fingerprint information which is input in advance;
the reading module is used for reading the fingerprint information output by the sensing module and the fingerprint information which is pre-recorded and stored in the storage module, and transmitting the read information to the data processing module;
the data processing module is used for carrying out data processing on the fingerprint information output by the sensing module to obtain processed fingerprint information, and comparing the processed fingerprint information with the fingerprint information which is input in advance to judge whether the two fingerprint information are the same.
Preferably, the sensing module comprises a substrate, and an insulating protection layer, a plurality of sensing electrode plates, an insulating medium layer and a thin film encapsulation layer which are sequentially stacked on the substrate, wherein the sensing electrode plates are in signal connection.
Preferably, a plurality of the sensing electrode plates are electrically connected through a metal line.
Preferably, a plurality of the sensing plates are arranged in a two-dimensional array.
Preferably, in the row direction, the distance between every two adjacent sensing plates is a first distance; in the column direction, the distance between every two adjacent sensing polar plates is a second distance; the first distance and the second distance are both smaller than the magnitude of the characteristic value of the distance between the fingerprint ridge and the valley.
Preferably, each of the sensing plates is circular, elliptical or square in shape.
Preferably, the thin film encapsulation layer is a flexible encapsulation layer.
Preferably, the material of the insulating medium layer is a material with a high dielectric constant.
Drawings
Fig. 1 is a schematic structural diagram of a flexible display screen according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating an operating principle of a sensing module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a sensing module according to an embodiment of the present invention;
FIG. 5a is a schematic structural diagram of a sensing plate according to an embodiment of the present invention;
FIG. 5b is a schematic structural diagram of a sensing plate according to an embodiment of the present invention;
fig. 5c is a schematic structural diagram of a sensing plate according to an embodiment of the present invention.
Icon:
1-a flexible display screen; 11-active display area; 12-a fingerprint sensing region; 2-a sensing module; 21-a substrate; 22-an insulating protective layer; 23-a sensing plate; 24-metal lines; 25-an insulating dielectric layer; 26-a thin film encapsulation layer; 3-a control module; 4-a data processing module; 5-a storage module; 6-a reading module; 7-finger; 8-shell.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a display device, which includes a housing 8, a flexible display screen 1 mounted on the housing 8, wherein the flexible display screen 1 forms an effective display area 11 and at least one fingerprint sensing area 12 located at the periphery of the effective display area 11, each fingerprint sensing area 12 of the flexible display screen 1 is integrated with a sensing module 2 for capturing fingerprint information, and the fingerprint sensing area 12 can be folded to the side of the housing 8 or a surface facing away from the flexible display screen 1.
The display device provided by the embodiment of the invention comprises a housing 8 and a flexible display screen 1 mounted on the housing 8, wherein the flexible display screen 1 forms an effective display area 11 and at least one fingerprint sensing area 12 located at the periphery of the effective display area 11, each fingerprint sensing area 12 of the flexible display screen 1 is integrated with a sensing module 2 for capturing fingerprint information, and the fingerprint sensing area 12 can be folded to the side surface of the housing 8 or the surface facing away from the flexible display screen 1. The display device is provided with the fingerprint sensing area 12 integrated with the sensing module 2 at the periphery of the effective display area 11 of the flexible display screen 1, namely the fingerprint sensing area 12 and the effective display area 11 are positioned on the same flexible display screen, and a special fingerprint sensor is not required to be arranged, so that the installation space is saved, and the area of the effective display area 11 is enlarged; the sensing module 2 is not positioned in the effective display area 11, is not influenced by cathode materials, and has high sensitivity and resolution; the fingerprint sensing area 12 can be arranged in different areas around the effective display area 11, and can be folded to the side surface of the housing 8 or the surface deviating from the flexible display screen 1, so that the fingerprint unlocking operation is convenient.
It should be noted that, in the present embodiment, the number and the positions of the fingerprint sensing regions 12 are not limited. The number of the fingerprint sensing areas 12 can be 1 or more, and the positions of the fingerprint sensing areas 12 can be located at one edge of the active display area 11 or at a plurality of edges.
For example, as shown in fig. 1, two fingerprint sensing areas 12 are formed on the flexible display screen 1, and the two fingerprint sensing areas 12 are respectively located at two opposite edges of the display screen effective display area 11, so that fingerprint unlocking is conveniently performed by using different gestures.
In the present embodiment, specifically, as shown in fig. 3, the display device further includes: the device comprises a control module 3, a data processing module 4, a storage module 5 and a reading module 6; the control module 3 is configured to control the sensing module 2 to capture fingerprint information of a finger contacting the fingerprint sensing region 12; the storage module 5 is used for storing fingerprint information which is input in advance; the reading module 6 is used for reading the fingerprint information output by the sensing module 2 and the fingerprint information which is pre-recorded and stored in the storage module 5, and transmitting the read information to the data processing module 4; the data processing module 4 is used for performing data processing on the fingerprint information output by the sensing module 2 to obtain processed fingerprint information, and comparing the processed fingerprint information with fingerprint information input in advance to judge whether the two pieces of fingerprint information are the same.
In the above embodiment, the structure of the sensing module 2 may be a capacitive identification structure, as shown in fig. 2.
The specific working process of the display device during fingerprint identification comprises the following steps:
firstly, inputting a fingerprint; when the finger 7 presses the fingerprint sensing area 12 of the flexible display screen 1, the control module 3 controls the sensing module 2 to capture fingerprint ridge and valley information of a plurality of feature points contacting the finger 7, and due to different distances between the ridge and valley of the fingerprint and the sensing electrode plate 23 in the sensing module 2, the generated capacitance is different in size, as shown in fig. 2; then, the reading module 6 reads the fingerprint information output by the sensing module 2, the data processing module 4 converts the analog signal of the fingerprint information into a digital signal to obtain complete fingerprint information, and the complete fingerprint information is stored in the storage module 5 to form pre-recorded fingerprint information;
secondly, fingerprint unlocking; when a user needs to unlock a fingerprint, the finger 7 presses the fingerprint sensing area 12 of the flexible display screen 1, and the control module 3 controls the sensing module 2 to capture fingerprint information of the finger contacting the fingerprint sensing area 12; the reading module 6 reads the fingerprint information output by the sensing module 2 and transmits the fingerprint information to the data processing module 4 for processing to obtain processed fingerprint information; the data processing module 4 compares and analyzes the processed fingerprint information with the fingerprint information which is input in advance, and if the two pieces of fingerprint information are judged to be the same, unlocking can be carried out.
In this embodiment, the specific structure of the sensing module 2 may include a substrate 21, and an insulating protection layer 22, a plurality of sensing plates 23, an insulating medium layer 25, and a thin film encapsulation layer 26 sequentially stacked on the substrate 21, wherein the plurality of sensing plates 23 are in signal connection, as shown in fig. 4. The insulating protection layer 22 of the sensing module 2 is used for isolating water and oxygen and protecting the internal circuit. Preferably, the material of the sensing module 2 on the fingerprint sensing area 12 is the same as the material of the corresponding layer of the active display area 11.
In this embodiment, the specific structure of the sensing module 2 is not limited in particular, and the sensing module 2 may be the capacitive structure shown in fig. 4, or may be another structure capable of implementing the function of capturing fingerprint information.
In the above embodiment, the sensing plates 23 are electrically connected by the metal lines 24, which is simple and easy to implement.
In the above embodiment, the arrangement of the sensing plates 23 may be two-dimensional array, so that the design is simple and the accuracy of fingerprint detection and identification can be enhanced.
Specifically, in the plurality of sensing plates 23 arranged in an array, in the row direction, the distance between every two adjacent sensing plates 23 is the first distance d1(ii) a The distance between every two adjacent sensing electrode plates along the column direction is a second distance d2As shown in fig. 5a-5 c; first distance d1And a second distance d2All smaller than the characteristic value d of the distance between the ridges and valleys of the fingerprint3As shown in fig. 2, ensures the fingerprintThe accuracy of the identification is checked. In the structure of the sensing substrate 23, the first distance d1And a second distance d2May be the same or different.
In the above embodiment, each sensing plate 23 may be alternatively circular, elliptical, square, or the like. For example, as shown in FIGS. 5a-5c, the sensing plate 23 is circular, elliptical, and square in shape, respectively. The shape of the sensing pad 23 is not limited to the shape shown in the drawings, but may be other shapes.
In the above embodiment, the thin film encapsulation layer 26 needs to be a flexible encapsulation layer, and the flexible encapsulation layer can ensure the foldability of the fingerprint sensing area of the flexible display screen. The flexible packaging layer can be realized by adopting a form of an inorganic layer + organic layer film.
In the above embodiment, the insulating medium layer 25 is preferably made of a high dielectric constant material, so as to obtain a relatively large capacitance value during fingerprint identification, thereby improving the sensitivity of the sensing module 2.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.