CN109031782B - Display screen assembly, electronic equipment and control method of electronic equipment - Google Patents
Display screen assembly, electronic equipment and control method of electronic equipment Download PDFInfo
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- CN109031782B CN109031782B CN201810860324.0A CN201810860324A CN109031782B CN 109031782 B CN109031782 B CN 109031782B CN 201810860324 A CN201810860324 A CN 201810860324A CN 109031782 B CN109031782 B CN 109031782B
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Abstract
The application provides a display screen assembly, electronic equipment and control method of electronic equipment, the display screen assembly includes: a driving substrate, which is located in the display area; the fingerprint identification sensor is arranged on the driving substrate; and the backlight assembly is arranged in a lamination manner with the driving substrate, the backlight assembly comprises a flexible circuit board, a plurality of first point light sources and a plurality of second point light sources, the flexible circuit board is arranged opposite to the driving substrate, the plurality of first point light sources and the plurality of second point light sources are arranged on the flexible circuit board at intervals and are positioned on one side of the flexible circuit board facing the driving substrate, the first point light sources are used for emitting first optical signals interacted with fingerprint lines so as to form target optical signals, the fingerprint identification sensor is used for receiving the target optical signals so as to identify fingerprint information, and the second point light sources are used for providing backlight for the display screen assembly. The method and the device realize in-screen fingerprint identification, so that the screen duty ratio of the electronic equipment is improved.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a display screen assembly, electronic equipment and a control method of the electronic equipment.
Background
The fingerprint recognition component of the electronic device occupies space in the non-display area, such that the increase in the screen ratio of the electronic device is impeded. With the increasing demand of users for high screen ratio of electronic devices, how to reduce the area occupied by the fingerprint recognition component in the non-display area of the electronic device, so as to increase the screen ratio of the electronic device is a problem to be solved.
Content of the application
The application provides a display screen assembly realizing high screen duty ratio, electronic equipment and a control method of the electronic equipment.
In one aspect, the present application provides a display screen assembly having a display area for displaying an image, the display screen assembly comprising:
the driving substrate is positioned in the display area;
the fingerprint identification sensor is arranged on the driving substrate; and
The backlight assembly is arranged on the driving substrate in a stacked mode, the backlight assembly comprises a flexible circuit board, a plurality of first point light sources and a plurality of second point light sources, the flexible circuit board is arranged opposite to the driving substrate, the first point light sources and the second point light sources are arranged on the flexible circuit board at intervals and located on one side of the flexible circuit board, the first point light sources are used for emitting first light signals interacted with fingerprint lines to form target light signals, the fingerprint identification sensor is used for receiving the target light signals to identify fingerprint information, and the second point light sources are used for providing backlight for the display screen assembly.
In another aspect, the application further provides an electronic device, which includes the display screen assembly.
In still another aspect, the present application further provides a control method of an electronic device, where the electronic device includes a display screen assembly, where the display screen assembly has a display area for displaying an image, the display screen assembly includes a driving substrate, a fingerprint identification sensor, and a backlight assembly, the driving substrate is located in the display area, and the fingerprint identification sensor is located in the driving substrate; the backlight assembly is stacked with the driving substrate, the backlight assembly includes a flexible circuit board, a plurality of first point light sources and a plurality of second point light sources, the flexible circuit board is disposed opposite to the driving substrate, the plurality of first point light sources and the plurality of second point light sources are disposed on the flexible circuit board at intervals and located at one side of the flexible circuit board facing the driving substrate, and the second point light sources are used for providing backlight for the display screen assembly, the method includes:
the processor controls the first point light source to emit a first optical signal interacted with the fingerprint grains so as to form a target optical signal;
the processor controls the fingerprint identification sensor to receive the target optical signal and converts the target optical signal into a target electrical signal;
the processor identifies fingerprint information of the fingerprint lines according to the target electrical signal.
Through set up first point light source in the backlight unit of display screen subassembly, the first light signal of first point light source transmission is after penetrating the display screen subassembly with fingerprint line interact to form the target light signal, this target light signal is received by the fingerprint identification sensor in the display screen subassembly, in order to realize fingerprint information's discernment, fingerprint identification sensor is located the display area of display screen subassembly, does not occupy the space in the non-display area of electronic equipment, and then can improve electronic equipment's screen ratio.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a cross-sectional view of a first display screen assembly provided in an embodiment of the present application.
Fig. 2 is a top view of a first display screen assembly provided in an embodiment of the present application.
FIG. 3 is a top view of a second display screen assembly according to an embodiment of the present application
FIG. 4 is a cross-sectional view of a third display screen assembly according to an embodiment of the present application
Fig. 5 is a top view of a fourth display screen assembly provided in an embodiment of the present application.
Fig. 6 is a top view of a fifth display screen assembly provided in an embodiment of the present application.
Fig. 7 is a top view of a sixth display screen assembly provided in an embodiment of the present application.
Fig. 8 is a top view of a driving substrate of a display panel assembly according to an embodiment of the present application.
FIG. 9 is a cross-sectional view of the fingerprint sensor of the display screen assembly provided in FIG. 8, taken along line A-A.
Fig. 10 is a cross-sectional view of the first type of drive substrate and fingerprint recognition sensor provided in fig. 8 along line B-B.
FIG. 11 is a cross-sectional view of another drive substrate and fingerprint sensor provided in FIG. 8 along line B-B.
Fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 13 is a cross-sectional view of one of the electronic devices provided in fig. 12 along line C-C.
Fig. 14 is a flowchart of a control method of an electronic device provided in an embodiment of the present application.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Referring to fig. 1, fig. 1 is a display screen assembly 10 according to an embodiment of the present application. The display screen assembly 10 has a display area 11 and a non-display area 12 surrounding the display area 11. The display area 11 is used for displaying images. The display screen assembly 10 includes a fingerprint recognition sensor 1, a touch substrate 2, a driving substrate 3, and a backlight assembly 4 stacked in this order. The touch substrate 2 may be stacked with the driving substrate 3. Further, the touch substrate 2 may be attached to the driving substrate 3. The outer surface of the touch substrate 2 may be used for the fingerprint pattern F contact of the user. The touch substrate 2 may be used to protect the driving substrate 2. The drive substrate 2 is located in the display area 11 of the display panel assembly 10. The fingerprint recognition sensor 1 is arranged on the driving substrate 3, that is, the fingerprint recognition sensor 1 is positioned in the display area 11 of the display screen assembly 10. The backlight assembly 4 is laminated with the driving substrate 3, and a gap may exist between the driving substrate 3 and the backlight assembly 4.
Referring to fig. 1, the backlight assembly 4 includes a flexible circuit board 43, a plurality of first point light sources 41 and a plurality of second point light sources 42. The plurality of first point light sources 41 and the plurality of second point light sources 42 are spaced apart on the flexible circuit board 43, and the plurality of first point light sources 41 and the plurality of second point light sources 42 are positioned on a side of the flexible circuit board 43 facing the driving substrate 3. The first point light source 41 and the second point light source 42 are electrically connected to the flexible circuit board 43. The first point light source 41 may be used to emit a first light signal a that interacts with the fingerprint pattern F to form a target light signal a1. It will be appreciated that the interaction between the first optical signal a and the fingerprint pattern F may be that the first optical signal a is reflected by the fingerprint pattern F, thereby forming the target optical signal a1. The fingerprint recognition sensor 1 may be used to receive the target optical signal a1 to recognize fingerprint information. The second point light source 42 emits a second light signal b that provides display brightness for the display screen assembly 10, and the second light signal b provides backlight for the display screen assembly 10. The wavelength of the first optical signal a and the wavelength of the second optical signal b are different.
When a finger of a user is facing the touch substrate 2, the first point light source 41 emits a first light signal a, and the first light signal a and the fingerprint pattern F react to form a target light signal a1. In other words, when the fingerprint pattern F contacts the touch substrate 2, or the fingerprint pattern F is disposed opposite to and spaced apart from the touch substrate 2, the first optical signal a is projected to the fingerprint pattern F and acts on the fingerprint pattern F to form the target optical signal a1. The target optical signal a1 carries fingerprint information. The target optical signal a1 is reflected to the fingerprint identification sensor 1 by the fingerprint pattern F, the fingerprint identification sensor 1 receives the target optical signal a1 and converts the target optical signal a1 into a target electric signal, and the processor stores and identifies fingerprint information of the fingerprint pattern F according to the target electric signal.
By arranging the first point light source 41 in the backlight assembly 4 of the display screen assembly 10, the first light signal a emitted by the first point light source 41 interacts with the fingerprint pattern F after exiting the display screen assembly 10 to form the target light signal a1, the target light signal a1 is received by the fingerprint identification sensor 1 in the display screen assembly so as to realize identification of fingerprint information, the fingerprint identification sensor 1 is positioned in the display area 11 of the display screen assembly, and does not occupy the space of the non-display area 11 of the electronic device, so that the screen occupation ratio of the electronic device can be improved.
In this embodiment, referring to fig. 1, the fingerprint pattern F has valleys F1 and ridges F2, when the fingerprint pattern F touches the touch substrate 2, the ridges F2 directly contact the surface 211 of the touch substrate 2, and an air gap is formed between the valleys F1 and the surface 211 of the touch substrate 2. The refractive index n1 (e.g., n1=1.55) of the ridge F2 is closer to the refractive index n3 (e.g., n3=1.5 for normal glass) of the touch substrate 2 than the refractive index n2 (e.g., n2=1) of air, and thus the intensity of the reflected light of the first optical signal a at the surface 211 of the touch substrate 2 is greater than the intensity of the reflected light at the surface of the ridge F2. Therefore, in the fingerprint image acquired by the fingerprint recognition sensor 1, the brightness of the image area corresponding to the valley F1 is strong, and the brightness of the image area corresponding to the ridge F2 is weak. Of course, in other embodiments, the fingerprint pattern F may be located on the touch substrate 2 and spaced apart from the touch substrate 2, and the fingerprint image is obtained by using the difference of the reflection intensities of the light rays from the valleys F1 and the ridges F2 of the fingerprint pattern F.
In this embodiment, the first optical signal a may be infrared light to reduce interference with the display image of the display screen assembly 10. The second optical signal b may be visible light. In other embodiments, the first optical signal a may be one or more of near-infrared light, ultraviolet light, near-ultraviolet light, visible light, and the like.
In this embodiment, referring to fig. 1, the first point light source 41 and the second point light source 42 are mini LEDs. Of course, in other embodiments, the first point light source 41 and the second point light source 42 may also be LEDs or the like. The mini LEDs are thin-film, miniaturized and arrayed LED units with the size of tens of micrometers, and can realize independent addressing of each pixel and independent driving luminescence like the OLED.
It is understood that the display screen may be an LCD display screen, an OLED display screen, or other screens with display functions.
It is understood that the driving substrate 3 described herein may be a thin film transistor array substrate provided with a plurality of thin film transistors, wherein the driving substrate 3 may be used to drive the pixel units of the display panel assembly 10. In addition, the driving substrate 3 may be a color film substrate, where the driving substrate 3 may be used to make the display screen assembly 10 appear color.
Specifically, the fingerprint recognition sensor 1 is located on the driving substrate 3, and specifically, the fingerprint recognition sensor 1 may be encapsulated in the driving substrate 3, or the fingerprint recognition sensor 1 may be disposed on an outer surface of the driving substrate 3. In one embodiment, the driving substrate 3 is a thin film transistor array substrate, and the fingerprint identification sensor 1 may be located at the same layer as the thin film transistors arranged in an array on the driving substrate 3 and are disposed at intervals. The fingerprint identification sensor 1 may be formed by the thin film transistors arranged in an array on the thin film transistor array substrate 3 in the same process.
It can be understood that, referring to fig. 1, in order to increase the structural strength of the flexible circuit board 43, the flexible circuit board 43 can be carried by the support board 44 to avoid unequal intervals between the plurality of first point light sources 41 and the plurality of second point light sources 42 and the driving substrate 3, and the support board 44 is parallel to the driving substrate 3, so that the intervals between the plurality of first point light sources 41 and the plurality of second point light sources 42 and the driving substrate 3 are equal, and the display brightness of the display screen assembly 10 is uniform.
By arranging the first point light source 41 in the second point light source 42 for providing the display light source, the first point light source 41 can be used for providing the optical signal for identifying fingerprint information so as to realize the fingerprint identification in the screen, and the first point light source 41 and the second point light source 42 are arranged on one flexible circuit board 43, that is, the first point light source 41 and the second point light source 42 can share the space and the circuit on the one flexible circuit board 43, so that the number of devices can be reduced, the space in the electronic equipment can be saved, and the device layout of the display screen assembly 10 can be reasonable.
Further, referring to fig. 2, the display screen assembly 10 further includes a first control circuit 401 and a second control circuit 402. The first control circuit 401 is electrically connected to the plurality of first point light sources 41 and the fingerprint recognition sensor 1. The first control circuit 401 may be configured to control the plurality of first point light sources 41 to emit the first optical signal a and control the fingerprint recognition sensor 1 to receive the target optical signal a1. The second control circuit 402 is electrically connected to the plurality of second point light sources 42. The second control circuit 402 may be configured to control the plurality of second point light sources 42 to emit the second optical signal b.
It will be appreciated that the first control circuit 401 and the second control circuit 402 may be independent of each other, in other words, the first control circuit 401 may individually control the first point light source 41 to light (i.e. emit the first light signal a), and the second control circuit 402 may individually control the second point light source 42 to light, so that the two processes do not interfere with each other. Specifically, fingerprint identification and display of the display assembly 10 are two independent processes, and the first control circuit 401 and the second control circuit 402 are provided to control the first point light source 41 and the second point light source 42 respectively, so that in a fingerprint identification scene, the first point light source 41 can emit the first light signal a alone, and in a display scene, the second point light source 42 can emit the second light signal b alone, and in a display and fingerprint identification scene, the first point light source 41 and the second point light source 42 can emit the light signal for fingerprint identification and the light signal for display simultaneously, thereby realizing different light signal emission aiming at different scenes, and improving the functionality, flexibility and stability of the electronic device.
Further, the first control circuit 401 may control a part of the first point light sources 41 to be in a lit state (i.e., a light emitting state) and another part of the first point light sources 41 to be in a turned-off state (i.e., a non-light emitting state). In other words, the first control circuit 401 may control the local first point light sources 41 to emit the first light signal a, so that the first point light sources 41 emit the first light signal a at the area corresponding to the fingerprint pattern F, and the first point light sources 41 are in the off state at the area not corresponding to the fingerprint pattern F, so that all the first point light sources 41 need to be turned on, the power consumption is reduced, and the user experience is increased.
In other embodiments, the first control circuit 401 and the second control circuit 402 may be multiplexed, in other words, the first control circuit 401 may control the first point light source 41 and the second point light source 42 to be in the lit state, or the second control circuit 402 may control the first point light source 41 and the second point light source 42 to be in the lit state, so as to reduce the setting of the control circuit.
In one embodiment, referring to fig. 3, the display screen assembly 10 further includes a sensing element 5. The sensing element 5 is disposed on the touch substrate 2. The sensing element 5 is electrically connected to the first control circuit 401. The sensing element 5 is used for generating a sensing signal. The first control circuit 401 controls the plurality of first point light sources 41 to be turned on according to the sensing signal.
Specifically, the sensing element 5 may be a pressure sensor, a sensing electrode, a distance sensor, etc., and the sensing element 5 provided in the present application includes, but is not limited to, the following embodiments:
in a first embodiment, referring to fig. 3, the sensing element 5 is a pressure sensor. The sensing element 5 is configured to sense a pressure value of a touch operation, and when the pressure value is greater than a preset pressure value, the first control circuit 401 controls the plurality of first point light sources 41 to emit the first optical signal a, and controls the fingerprint identification sensor 1 to collect the target optical signal a1. The preset pressure value may be a value greater than 0. In particular, the sensing element 5 may be provided throughout the touch substrate 2. The sensing element 5 provides a trigger condition for lighting the first spot light source 41 so that the fingerprint recognition sensor 1 does not need to collect the target light signal a1 at any time period, thereby reducing power consumption.
It will be appreciated that in one embodiment, the plurality of first point light sources 41 may be controlled to be turned on or off, respectively, and the position coordinates of the sensing element 5 on the fingerprint touch substrate 2 may form a mapping relationship with the position coordinates of the plurality of first point light sources 42 on the flexible circuit board 43. In this way, when the pressure value sensed by the sensing element 5 located in a certain target area is greater than the preset pressure value, the first point light source 42 corresponding to the target area can be controlled to be turned on by the first control circuit 401.
In other embodiments, the second optical signal b emitted by the second point light source 42 may also interact with the fingerprint pattern F to collect fingerprint information.
In a second embodiment, referring to fig. 3, the sensing element 5 is a sensing electrode. The sensing element 5 may form a capacitance with the fingerprint pattern F. The sensing element 5 is used for sensing a capacitance value between the sensing electrode and the fingerprint pattern F. When the sensing element 5 senses that the capacitance value of a certain target area is greater than a preset capacitance value (the preset capacitance value may be a value greater than 0), which indicates that the target area has the fingerprint pattern F in contact or close to the target area, the first control circuit 401 controls the plurality of first point light sources 41 to emit the first optical signal a, and controls the fingerprint identification sensor 1 to collect the target optical signal a1. The first control circuit 401 may control the plurality of first point light sources 41 corresponding to the target area to emit the first optical signal a, and control the fingerprint identification sensor 1 corresponding to the target area to collect the target optical signal a1. The sensing elements 5 can be uniformly distributed in the whole display area 11, so that the fingerprint lines F can be at any position, and the sensing elements 5 can perform capacitance detection. The sensing element 5 provides a trigger condition for lighting the first spot light source 41 so that the fingerprint recognition sensor 1 does not need to collect the target light signal a1 at any time period, thereby reducing power consumption.
In one embodiment, referring to fig. 4, the backlight assembly 4 further includes a diffusion film 45. The diffusion film 45 is located between the first point light source 41 and the second point light source 42 and the driving substrate 3. The diffusion film 45 may be used to make the light signal undergo multiple refraction, reflection and scattering, and may modify the light signal to form a uniform surface light source so as to achieve the effect of optical diffusion. The diffusion film 45 may be used to uniformly diffuse the first light signals a emitted by the plurality of first point light sources 41 to the whole light guide plate, so as to avoid the problems that the light signals at the point light sources are strong and the light signals at the point light sources are weak, thereby improving the uniformity of the light signals emitted by the backlight assembly 4 and improving the reliability of fingerprint identification on the display screen assembly 10.
In other embodiments, referring to fig. 4, the backlight assembly 4 may further include a brightness enhancement film 47. The light enhancement film 47 may be positioned between the diffusion film 45 and the driving substrate 3 to increase the intensity of the optical signal penetrating the light enhancement film 47. The light enhancement film 47 is used to concentrate light signals in different directions to a direction perpendicular to the display area 11 for transmission. The light enhancement film 47 may include an upper light enhancement film and a lower light enhancement film which are stacked.
By setting the first point light sources 41 and the second point light sources 42 to be mini LEDs or micro LEDs, since the first point light sources 41 and the second point light sources 42 are smaller in size, a plurality of first point light sources 41 and the second point light sources 42 can be arranged on the flexible circuit board, so that the first point light sources 41 and the second point light sources 42 are densely distributed, the light emitted by the first point light sources 41 and the second point light sources 42 is bright and uniformly distributed, the light emitted by the first point light sources 41 and the second point light sources 42 can be conducted without setting a light guide plate, and the light emitted by the first point light sources 41 and the light emitted by the second point light sources 42 can be reflected without setting a reflecting sheet, so that the thickness of the display screen assembly 10 can be reduced.
Referring to fig. 2, the plurality of first point light sources 41 and the plurality of second point light sources 42 form a light source array, and the light source array faces the whole display area 11.
Specifically, referring to fig. 2, a plurality of first point light sources 41 and a plurality of second point light sources 42 are arranged at intervals, and the plurality of first point light sources 41 and the plurality of second point light sources 42 are arranged in order of a plurality of rows and a plurality of columns to form a rectangular array. The first point light source 41 and the second point light source 42 are disposed throughout the display area 11 such that the entire display area 11 can be lighted by the second point light source 42 to provide display brightness of the display area 11. For example, the first point light sources 41 may be arranged in an array, and the second point light sources 42 are arranged in an array, and the first point light sources 41 and the second point light sources 42 are alternately arranged. Specifically, one first point light source 41 may be located between two second point light sources 42, and one second point light source 42 may be located between two first point light sources 41, that is, the first point light sources 41 and the second point light sources 42 are alternately arranged in sequence. Of course, in other embodiments, the N first point light sources 41 and the M second point light sources 42 are sequentially and alternately arranged, where N is an integer greater than 1 and M is an integer greater than 1.
In an embodiment, referring to fig. 2, the first point light sources 41 may be distributed throughout the entire display area, so that the light signals emitted by the first point light sources 41 may be distributed throughout the entire display area 11, so that the entire display area 11 may detect the fingerprint patterns F of the user, and thus, fingerprint recognition may be implemented at any position of the full display screen.
In one embodiment, referring to fig. 5, the first point light source 41 is located in the area of the display area 11 near the non-display area 12. The first point light source 41 is located at an edge area of the display area 11 to reduce an influence on a display function of the display area 11.
In another embodiment, referring to fig. 6, the first point light source 41 may face a local area of the display area 11. For example, the first point light source 41 is facing the central area of the display area 11.
In an embodiment, referring to fig. 7, the display area 11 includes two long sides 11a and 11b, and a first short side 11c and a second short side 11d. The two long sides 11a, 11b are oppositely arranged, the first short side 11c and the second short side 11d are oppositely arranged, and the two long sides 11a, 11b are connected between the first short side 11c and the second short side 11d. The first short side 11c and the second short side 11d have a boundary edge therebetween. The boundary edge is arranged opposite to the first short side 11 c. The boundary edge 11e forms a fingerprint identification area 11f with the first short edge 11c and the two long edges, and the first point light source 41 faces the fingerprint identification area 11f. In other words, the first point light source 41 is provided on one side of the boundary 11e, and the first point light source 41 is not provided on the other side of the boundary 11 e. Further, the first short side 11c is close to the sound outlet hole 13 of the speaker. When the user holds and uses the electronic device, the finger of the user approaches the fingerprint identification area 11f, so that the user can easily place the finger lines on the finger touch surface, the portability of fingerprint identification by the user is improved, and the user experience is improved.
Referring to fig. 8, the driving substrate 3 may be a thin film transistor array substrate. The driving substrate 3 includes a plurality of data lines 32 and a plurality of scan lines 33. The plurality of data lines 32 and the plurality of scan lines 33 form a plurality of pixel regions 34 arranged in an array. Each pixel region 34 is substantially rectangular. The driving substrate 3 further includes a plurality of thin film transistors 31. One of the thin film transistors 31 is disposed in each of the pixel regions 34. The number of fingerprint recognition sensors 1 is plural. One of the fingerprint recognition sensors 1 is located in one of the pixel areas 34. The fingerprint recognition sensor 1 is disposed diagonally or adjacent to the thin film transistors 31 in the same pixel region 34.
In one embodiment, referring to fig. 9, the fingerprint recognition sensor 1 includes a photosensitive layer 101 and a light shielding layer 102. The light shielding layer 102 is located between the backlight assembly 4 and the photosensitive layer 101. The resistance of the photosensitive layer 101 changes with the intensity of the received light, in other words, the intensity of the first optical signal a received by the photosensitive layer 101 can be detected according to the resistance value of the photosensitive layer 101, fingerprint information can be formed by detecting the intensities of the first optical signals a received by the photosensitive layer 101 of the fingerprint identification sensors 1, and fingerprint identification can be performed by comparing the fingerprint information with pre-stored fingerprint information.
Further, referring to fig. 9, the light shielding layer 102 may be made of a light-tight material, so as to shield the light of the backlight assembly 4 from penetrating the light shielding layer 102 and entering the photosensitive layer 101, thereby causing a change in the resistance of the photosensitive layer 101, which results in no distinction as to whether the resistance is changed due to the light signal reflected by the finger. For example, the light shielding layer is made of aluminum metal AL.
Further, referring to fig. 9, the front projection of the light shielding layer 102 on the photosensitive layer 101 covers the photosensitive layer 101 to prevent the photosensitive layer 101 from receiving the light signal incident from the backlight assembly 4.
Specifically, the photosensitive layer 101 may include lead sulfide PbS, or indium tin zinc oxide ITZO, or indium gallium zinc oxide IGZO, or the like. When the first optical signal a is infrared light or near infrared light, the material of the photosensitive layer 101 may be a material having a special response to infrared light, such as lead sulfide PbS. When the first optical signal a is ultraviolet light or near ultraviolet light, the material of the photosensitive layer 101 may be a semiconductor material such as indium tin zinc oxide ITZO or indium gallium zinc oxide IGZO.
Further, referring to fig. 9, the fingerprint recognition sensor 1 further includes a filter layer 103, and the filter layer 103 is located between the photosensitive layer 101 and the touch substrate 2. The filter layer 103 may be used to filter sunlight or the second optical signal b, so as to make the first optical signal a received by the photosensitive layer 101 purer.
Further, referring to fig. 9, the fingerprint recognition sensor 1 further includes a condensing lens 104, the condensing lens 104 is disposed opposite to the optical filter layer 103, and the condensing lens 104 is located at a side of the optical filter layer 103 away from the photosensitive layer 101. The condensing lens 104 may be used for receiving the first optical signal a reflected by the fingerprint pattern F and condensing the first optical signal a to the photosensitive layer 101.
In an embodiment, referring to fig. 10, the thin film transistor 31 includes a substrate 311, a source/drain layer 312, an insulating layer 313 and a gate layer 314 stacked in sequence. The light shielding layer 102 and the substrate 311 are located on the same layer, and the photosensitive layer 101 and the source/drain layer 312 are located on the same layer. The filter layer 103 and the insulating layer 313 are located on the same layer, and the condenser lens 104 and the gate layer 314 are located on the same layer.
In another embodiment, referring to fig. 11, the thin film transistor 31 includes a substrate 311, a gate layer 314, an insulating layer 313 and a source/drain layer 312 stacked in order. The light shielding layer 102 and the substrate 311 are located on the same layer, and the photosensitive layer 101 and the gate layer 314 are located on the same layer. The filter layer 103 and the insulating layer 313 are located on the same layer, and the condensing lens 104 and the source/drain layer 312 are located on the same layer.
In other embodiments, the photosensitive layer 101 may also be located in other structural layers of the drive substrate 3; or the photosensitive layer 101 may also be located on the outer surface of the drive substrate 3; or the photosensitive layer 101 may also be located in other layers than the drive substrate 3. In other embodiments, the filter layer 103 and the condensing lens 104 may be located at an outer surface of the driving substrate 3, or the filter layer 103 and the condensing lens 104 may be located at other layers between the driving substrate 3 and the touch substrate 2 of the display panel assembly 10.
In an embodiment, referring to fig. 12, the display screen assembly 10 further includes a color film substrate 6, a liquid crystal layer 8, and a frame 9. The color film substrate 6 is disposed opposite to the driving substrate 3. The touch substrate 2 is covered on the color film substrate 6 to form a protective layer. A touch electrode layer 21 may be further included in the touch substrate 2 to implement a touch function. The color film substrate 6 is located at a side of the driving substrate 3 away from the backlight assembly 4. The second optical signal b interacts with the color resist layer in the color film substrate 6 when passing through the color film substrate 6 to present a color image. The liquid crystal layer 8 is located between the color film substrate 6 and the driving substrate 3. The liquid crystal molecules in the liquid crystal layer 8 are deflected by the voltage to control the intensity of the second optical signal b exiting the liquid crystal layer 8. The glue frame 9 fixes the color film substrate 6, the thin film transistor substrate and the backlight assembly 4 to form a display screen assembly 10.
Referring to fig. 13, the present application further provides an electronic device 100, where the display screen assembly 10 according to any one of the foregoing embodiments of the electronic device 100 is described. The electronic device 100 may be an electronic product with a display function, such as a mobile phone, a notebook, a palm computer, an electronic reader, a television, an intelligent home appliance, an intelligent operation screen, an intelligent home, a wearable electronic device, a vehicle-mounted display, and the like.
In an embodiment, referring to fig. 1 and 13, when the fingerprint pattern F contacts the touch substrate, the processor 20 sends a lighting command to the first control circuit 401, and the first control circuit 401 lights the first lighting source 41 opposite to the fingerprint pattern F. By controlling the local first point light source 41 to be turned on, not only fingerprint identification is realized, but also energy consumption can be reduced.
Referring to fig. 14, referring to fig. 1 and fig. 13 in combination, the present application further provides a control method 200 of an electronic device, where the control method 200 of an electronic device should be applicable to the electronic device 100 according to any of the foregoing embodiments. The method 200 includes the following steps.
201. The processor controls the first point light source to emit a first light signal interacted with the fingerprint grains to form a target light signal.
Specifically, referring to fig. 1 and 13, when the fingerprint pattern F touches the touch substrate 2, or the fingerprint pattern F is opposite to and spaced apart from the touch substrate 2, the processor 20 controls the first point light source 41 to emit a first light signal a, where the first light signal a is projected to the fingerprint pattern F and interacts with the fingerprint pattern F to form a target light signal a1, and the target light signal a1 carries fingerprint information.
For example, the fingerprint pattern F has valleys F1 and ridges F2, and when the fingerprint pattern F touches the touch substrate 2, the ridges F2 directly contact the surface 211 of the touch substrate 2, and an air gap is provided between the valleys F1 and the surface 211 of the touch substrate 2. The refractive index n1 (e.g., n1=1.55) of the ridge F2 is closer to the refractive index n3 (e.g., n3=1.5 for normal glass) of the touch substrate 2 than the refractive index n2 (e.g., n2=1) of air, and thus the intensity of the reflected light of the first optical signal a at the surface 211 of the touch substrate 2 is greater than the intensity of the reflected light at the surface of the ridge F2. Therefore, in the fingerprint image acquired by the fingerprint recognition sensor 1, the brightness of the image area corresponding to the valley F1 is strong, and the brightness of the image area corresponding to the ridge F2 is weak.
202. The processor controls the fingerprint recognition sensor to receive the target optical signal and converts the target optical signal into a target electrical signal.
Specifically, the processor 20 is electrically connected to the fingerprint recognition sensor 1, the target optical signal a1 is reflected to the fingerprint recognition sensor 1, the photosensitive layer in the fingerprint recognition sensor 1 receives the target optical signal a1 and converts the target optical signal a1 into a target electrical signal, and the fingerprint recognition sensor 1 transmits the target electrical signal to the processor 20.
203. The processor identifies fingerprint information of the fingerprint lines according to the target electrical signal.
Specifically, the processor 20 receives the target electrical signal and processes the target electrical signal through a fingerprint device algorithm, so that the ridges F2 on the fingerprint lines F are black lines and the valleys on the fingerprint lines F are white, thereby displaying the fingerprint information of the fingerprint lines F.
204. The processor controls the second point light source to provide display brightness for the display screen assembly.
Specifically, when the electronic device 100 needs to perform the display function, the processor 20 controls the second point light source 42 to emit the second optical signal b, and the second optical signal b may enable the entire display area 11 to be lightened, so as to implement the display function of the display area 11.
Specifically, in an embodiment, when the second point light source 42 is turned off and the fingerprint pattern F touches the touch substrate 2, the processor 20 controls the first point light source 41 to emit the first light signal a, and performs fingerprint information identification of the fingerprint pattern F. The processor 20 judges whether the fingerprint information is matched with the pre-stored fingerprint information, and if the fingerprint information is matched with the pre-stored fingerprint information, the processor 20 controls the second point light source 42 to emit a second light signal b to light the display area 11; if the result is a mismatch, the processor 20 controls the second point light source 42 to emit a second light signal b to illuminate the display area 11 and display a reminder "fingerprint information mismatch".
In another embodiment, when the second point light source 42 is turned on and the fingerprint pattern F touches the touch substrate 2, the processor 20 controls the first point light source 41 to emit the first light signal a and performs fingerprint information identification of the fingerprint pattern F. The processor 20 judges whether the fingerprint information is matched with the pre-stored fingerprint information, and if the fingerprint information is matched, the next step is performed; if the result is a mismatch, a reminder "fingerprint information mismatch" is displayed.
While the foregoing is directed to the preferred embodiments of the present application, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the present application, such changes and modifications are also intended to be within the scope of the present application.
Claims (18)
1. A display screen assembly having a display area for displaying an image, the display screen assembly comprising:
the driving substrate is positioned in the display area;
the fingerprint identification sensor is arranged on the driving substrate;
the backlight assembly is arranged in a stacked mode with the driving substrate, the backlight assembly comprises a flexible circuit board, a plurality of first point light sources and a plurality of second point light sources, the flexible circuit board is arranged opposite to the driving substrate, the plurality of first point light sources and the plurality of second point light sources are arranged on the flexible circuit board at intervals and are positioned on one side of the flexible circuit board, which faces the driving substrate, the first point light sources and the second point light sources are mini LEDs or micro LEDs, the first point light sources are used for emitting first light signals interacted with fingerprint lines to form target light signals, the fingerprint identification sensor is used for receiving the target light signals to identify fingerprint information, and the second point light sources are used for providing backlight for the display screen assembly; and
The first control circuit is electrically connected with the plurality of first point light sources and the fingerprint identification sensor, and is used for controlling the plurality of first point light sources corresponding to the fingerprint texture area to emit the first optical signals and controlling the fingerprint identification sensor to receive the target optical signals;
the touch substrate is located one side of the driving substrate, which is away from the backlight assembly, the touch substrate is used for contacting with the fingerprint lines, the sensing element is arranged on the touch substrate, the sensing element is a sensing electrode, or a pressure sensor or a distance sensor, the sensing element is electrically connected with the first control circuit, the sensing element is used for generating sensing signals, and the first control circuit controls the plurality of first lighting sources to light according to the sensing signals.
2. The display screen assembly of claim 1, further comprising a second control circuit independent of the first control circuit, the second control circuit electrically connected to the plurality of second point light sources, the second control circuit configured to control the plurality of second point light sources to emit a second light signal.
3. The display screen assembly of claim 2, wherein the sensing element forms a mapping relationship between position coordinates on the touch substrate and position coordinates of the plurality of first point light sources on the flexible circuit board; the sensing element is a pressure sensor and is used for sensing a pressure value of touch operation, and when the pressure value is larger than a preset pressure value, the first control circuit controls the plurality of first point light sources to emit the first light signals and controls the fingerprint identification sensor to collect the target light signals.
4. The display screen assembly of claim 2, wherein the sensing element forms a mapping relationship between position coordinates on the touch substrate and position coordinates of the plurality of first point light sources on the flexible circuit board; the sensing element is an sensing electrode, the sensing element is used for sensing a capacitance value between the electrode and the fingerprint lines, and when the capacitance value is larger than a preset capacitance value, the first control circuit controls the first point light sources to emit the first light signals and controls the fingerprint identification sensor to collect the target light signals.
5. The display screen assembly of any one of claims 1-4, wherein the driving substrate comprises a plurality of pixel areas and a plurality of thin film transistors, the plurality of pixel areas are arranged in an array, one thin film transistor is arranged in each pixel area, the number of the fingerprint identification sensors is a plurality, one fingerprint identification sensor is positioned in one pixel area, and the fingerprint identification sensors and the thin film transistors positioned in the same pixel area are diagonally arranged or adjacently arranged.
6. The display screen assembly of claim 5, wherein the fingerprint recognition sensor includes a photosensitive layer and a light shielding layer, the light shielding layer being located between the photosensitive layer and the backlight assembly, an orthographic projection of the light shielding layer on the photosensitive layer covering the photosensitive layer.
7. The display screen assembly of claim 6, wherein the fingerprint recognition sensor further comprises a filter layer disposed opposite the photosensitive layer, the filter layer being located on a side of the photosensitive layer facing away from the light shielding layer.
8. The display screen assembly of claim 7, wherein the fingerprint recognition sensor further comprises a condensing lens disposed opposite the filter layer, the condensing lens being located on a side of the filter layer facing away from the photosensitive layer.
9. The display screen assembly of claim 8, wherein the thin film transistor comprises a substrate, a source-drain layer, an insulating layer and a gate layer which are laminated in sequence, the light shielding layer and the substrate are positioned on the same layer, the photosensitive layer and the source-drain layer are positioned on the same layer, the light filtering layer and the insulating layer are positioned on the same layer, and the condensing lens and the gate layer are positioned on the same layer.
10. The display screen assembly of any one of claims 1-4, wherein the plurality of first point light sources and the plurality of second point light sources form a light source array, the light source array facing the entire display area.
11. The display screen assembly of claim 10, further comprising a non-display region surrounding the display region, the first point light source being located in an area of the display region proximate to the non-display region.
12. The display screen assembly of claim 10, wherein the plurality of first point light sources are arranged in an array and the plurality of first point light sources are alternately arranged with the plurality of second point light sources.
13. The display screen assembly of claim 10, wherein the display area includes two long sides and two short sides, the two long sides are disposed opposite each other, the two long sides are connected between the two short sides, a boundary edge is provided between the two short sides, the boundary edge forms a fingerprint identification area with one of the short sides and the two long sides, and the first point light source is opposite to the fingerprint identification area.
14. The display screen assembly of any one of claims 2-4, wherein the first light signal is one or more of infrared light, near infrared light, ultraviolet light, near ultraviolet light; the second optical signal is visible light.
15. The display screen assembly of any one of claims 1-4, wherein the backlight assembly further comprises a diffusion film between the first and second point light sources and the drive substrate.
16. The display screen assembly of any one of claims 1-4, further comprising a color film substrate and a liquid crystal layer, wherein the color film substrate is positioned on a side of the drive substrate facing away from the backlight assembly, the color film substrate is disposed opposite the drive substrate, and the liquid crystal layer is positioned between the color film substrate and the drive substrate.
17. An electronic device comprising a display assembly as claimed in any one of claims 1 to 16.
18. The control method of the electronic equipment is characterized by comprising a display screen assembly and a processor, wherein the display screen assembly is provided with a display area for displaying images, the display screen assembly comprises a driving substrate, a fingerprint identification sensor, a backlight assembly, a first control circuit, a touch substrate and a sensing element, the driving substrate is positioned in the display area, and the fingerprint identification sensor is arranged on the driving substrate; the backlight assembly is arranged in a stacked mode with the driving substrate, the backlight assembly comprises a flexible circuit board, a plurality of first point light sources and a plurality of second point light sources, the flexible circuit board is arranged opposite to the driving substrate, the plurality of first point light sources and the plurality of second point light sources are arranged on the flexible circuit board at intervals and are positioned on one side of the flexible circuit board, which faces the driving substrate, the first point light sources and the second point light sources are mini LEDs or micro LEDs, the second point light sources are used for providing backlight for the display screen assembly, the first control circuit is electrically connected with the plurality of first point light sources and the fingerprint identification sensor, and the first control circuit is used for controlling the plurality of first point light sources corresponding to the fingerprint pattern area to emit first light signals and controlling the fingerprint identification sensor to receive target light signals; the touch substrate is located one side of the driving substrate, which is away from the backlight assembly, the touch substrate is used for contacting with the fingerprint lines, the sensing element is arranged on the touch substrate, the sensing element is a sensing electrode, a pressure sensor or a distance sensor, the sensing element is electrically connected with the first control circuit, the sensing element is used for generating sensing signals, and the first control circuit controls the plurality of first light sources to light according to the sensing signals, the method comprises the following steps:
the processor controls the first control circuit to control the first point light source corresponding to the region of the fingerprint texture to emit the first light signal interacted with the fingerprint texture to form the target light signal;
the processor controls the fingerprint identification sensor to receive the target optical signal and converts the target optical signal into a target electrical signal;
the processor identifies fingerprint information of the fingerprint lines according to the target electrical signal.
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| CN109782468A (en) * | 2018-12-28 | 2019-05-21 | 惠科股份有限公司 | Display panel and display device |
| CN109858387B (en) * | 2019-01-09 | 2021-06-29 | 昆山国显光电有限公司 | Display panel and fingerprint identification method |
| CN109782485A (en) * | 2019-01-31 | 2019-05-21 | 厦门天马微电子有限公司 | A kind of display device |
| CN109902626B (en) * | 2019-02-27 | 2024-01-05 | 维沃移动通信有限公司 | Terminal equipment |
| CN110088674B (en) * | 2019-03-11 | 2023-07-04 | 深圳阜时科技有限公司 | Backlight module, display device and electronic equipment |
| CN110221466B (en) * | 2019-04-29 | 2021-11-19 | 厦门天马微电子有限公司 | Display panel and display device |
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| CN110928049A (en) * | 2019-12-13 | 2020-03-27 | 维沃移动通信有限公司 | Display screen module and electronic equipment |
| CN111025709A (en) * | 2019-12-23 | 2020-04-17 | 厦门天马微电子有限公司 | Display panel and display device |
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