CN116844195A - display device - Google Patents

display device Download PDF

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Publication number
CN116844195A
CN116844195A CN202310797212.6A CN202310797212A CN116844195A CN 116844195 A CN116844195 A CN 116844195A CN 202310797212 A CN202310797212 A CN 202310797212A CN 116844195 A CN116844195 A CN 116844195A
Authority
CN
China
Prior art keywords
unit
touch
electrically connected
fingerprint identification
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310797212.6A
Other languages
Chinese (zh)
Inventor
杨显青
郭瑞
申海静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan Govisionox Optoelectronics Co Ltd
Original Assignee
Kunshan Govisionox Optoelectronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kunshan Govisionox Optoelectronics Co Ltd filed Critical Kunshan Govisionox Optoelectronics Co Ltd
Priority to CN202310797212.6A priority Critical patent/CN116844195A/en
Publication of CN116844195A publication Critical patent/CN116844195A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • 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
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Image Input (AREA)

Abstract

The application discloses a display device, the display device has the first district and at least partly surrounds the second district that the first district sets up, the display device includes: a substrate; the fingerprint identification units and the touch control units are arranged on the same side of the substrate, the fingerprint identification units are arranged in the first area, the touch control units are arranged in the second area, the orthographic projection area of the fingerprint identification units on the substrate is smaller than that of the touch control units on the substrate, and the touch control units have a first working voltage; the boost unit is connected with the fingerprint identification units and is configured to enable the fingerprint identification units to have a second working voltage, and the second working voltage is larger than the first working voltage. By additionally arranging the booster unit in the display device, the electric field intensity of the electric field formed at the fingerprint identification unit is larger, so that the penetration capability of the electric field formed at the fingerprint identification unit is increased, and the sensitivity of fingerprint identification is improved.

Description

Display device
Technical Field
The application belongs to the technical field of electronic products, and particularly relates to a display device.
Background
With the continuous development of electronic technology, more and more application scenes in life need to use a display device, and based on the application, how to ensure the reliability of signal transmission in the display device is a problem to be solved at present.
Disclosure of Invention
In order to solve the above problems or other problems, the present application provides the following technical solutions.
In one aspect, an embodiment of the present application provides a display device having a first region and a second region disposed at least partially around the first region, the display device including: a substrate; the fingerprint identification units are arranged on the same side of the substrate, the fingerprint identification units are arranged in the first area, the touch control units are arranged in the second area, the orthographic projection area of the fingerprint identification units on the substrate is smaller than the orthographic projection area of the touch control units on the substrate, and the touch control units have a first working voltage; and the boosting unit is connected with the fingerprint identification units and is configured to enable the fingerprint identification units to have a second working voltage, and the second working voltage is larger than the first working voltage.
According to one aspect of the application, the touch control device further comprises a first control chip, wherein the touch control unit and the fingerprint identification unit are respectively and electrically connected with the same first control chip; the boosting unit is arranged in the first control chip.
According to one aspect of the application, the touch control device further comprises a first control chip and a driving circuit, wherein the touch control unit and the fingerprint identification unit are respectively and electrically connected with the same first control chip through the driving circuit; the boosting unit is arranged in the driving circuit.
According to one aspect of the application, the fingerprint recognition unit is electrically connected with the first control chip, and the touch control unit is electrically connected with the second control chip; the boosting unit is arranged in the first control chip.
According to one aspect of the application, the fingerprint recognition unit further comprises a first control chip, a second control chip, a first driving circuit and a second driving circuit, wherein the fingerprint recognition unit is electrically connected with the first control chip through the first driving circuit, and the touch control unit is electrically connected with the second control chip through the second driving circuit; the boosting unit is arranged in the first driving circuit.
According to one aspect of the application, wherein: the fingerprint identification unit comprises a first fingerprint identification electrode and a second fingerprint identification electrode which are oppositely arranged in the thickness direction of the substrate, and the voltage boosting unit is electrically connected with one of the first fingerprint identification electrode and the second fingerprint identification electrode; or, the fingerprint recognition unit comprises a fingerprint recognition electrode, and the voltage boosting unit is electrically connected with one end of the fingerprint recognition electrode.
According to an aspect of the present application, the display device further includes a fingerprint detection trace and a touch detection trace, the fingerprint detection trace is electrically connected to the fingerprint recognition unit, and the touch detection trace is electrically connected to the touch unit, wherein: the fingerprint detection wiring and the touch detection wiring are at least partially arranged on the same layer; or, the fingerprint detection wiring and the touch detection wiring are arranged in different layers.
According to one aspect of the application, wherein: the touch control unit comprises a first touch control electrode and a second touch control electrode which are oppositely arranged in the thickness direction, and the touch control detection wire is electrically connected with one of the first touch control electrode and the second touch control electrode; or, the touch unit comprises a touch electrode, and the touch detection wire is electrically connected with one end of the touch electrode.
According to one aspect of the present application, the boosting unit has a signal input end and a signal output end, the signal input end is electrically connected with the first control chip, the signal output end is electrically connected with the fingerprint identification unit, wherein the voltage received by the signal input end is smaller than the voltage output by the signal output end; preferably, the voltage received by the signal input end is a first working voltage, and the voltage output by the signal output end is a second working voltage.
According to one aspect of the present application, the plurality of touch units have a first density, and the plurality of fingerprint recognition units have a second density, the first density being smaller than the second density; preferably, the boost unit includes an inductor, a diode, a switch, a capacitor, and a load resistor, wherein: the first end of the inductor is electrically connected with the positive electrode of the power supply, the second end of the inductor is electrically connected with the anode of the diode and the first end of the switch, the cathode of the diode is electrically connected with the first electrode of the capacitor and the first end of the resistor, the second electrode of the capacitor, the second end of the switch and the second end of the resistor are electrically connected with the negative electrode of the power supply, and the first end of the resistor is electrically connected with the fingerprint identification unit; preferably, the control end of the switch is used for receiving a pulse width modulation signal; preferably, the switch is a metal-oxide semiconductor field effect transistor or a junction field effect transistor.
Compared with the related art, the embodiment of the application adds the booster unit in the display device, wherein the booster unit is connected with the fingerprint identification unit, and the booster unit is configured to enable the fingerprint identification unit to have the second working voltage which is larger than the first working voltage of the touch control unit, and the second working voltage configured to the fingerprint identification unit is larger than the first working voltage configured to the touch control unit, so that the electric field intensity of the electric field formed at the fingerprint identification unit is larger in unit time, the penetration capability of the electric field formed at the fingerprint identification unit is increased, and the sensitivity of fingerprint identification is improved.
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 of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application;
FIG. 2 is a schematic circuit diagram of a boosting unit according to an embodiment of the present application;
FIGS. 3a-3c are schematic circuit diagrams of a boosting unit in an operating state according to an embodiment of the present application;
FIG. 4 is a schematic circuit diagram of a boosting unit according to another embodiment of the present application;
FIG. 5 is a schematic circuit diagram of a boosting unit according to another embodiment of the present application;
fig. 6 is a schematic structural diagram of a display device according to another embodiment of the present application;
fig. 7 is a schematic structural diagram of a display device according to another embodiment of the present application;
fig. 8 is a schematic structural diagram of a display device according to another embodiment of the present application.
In the accompanying drawings:
1-a substrate; 2-a fingerprint recognition unit; 21-a first fingerprint recognition electrode; 22-a second fingerprint recognition electrode; a 3-touch unit; 31-a first touch electrode; 32-a second touch electrode; 4-a first control chip; 41-a first control chip; 42-a second control chip; a 5-step-up unit; d1-a first wiring; d2-a second wiring; a1-a first region; a2-a second region; x-a first direction; y-second direction.
Detailed Description
Features and exemplary embodiments of various aspects of the application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
In order to better understand the present application, a display device according to an embodiment of the present application will be described in detail with reference to fig. 1 to 8.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device according to an embodiment of the application.
The embodiment of the application provides a display device, which is provided with a first area A1 and a second area A2 at least partially arranged around the first area A1, and comprises: a substrate 1; the fingerprint identification unit 2 and the touch control unit 3 are arranged on the same side of the substrate 1, the fingerprint identification unit 2 and the touch control unit 3 are at least partially arranged on the same layer, the fingerprint identification unit 2 is arranged in the first area A1, the touch control unit 3 is arranged in the second area A2, the orthographic projection area of the fingerprint identification unit 2 on the substrate 1 is smaller than the orthographic projection area of the touch control unit 3 on the substrate 1, and the touch control unit 3 has a first working voltage; the boosting unit 5, the boosting unit 5 and the plurality of fingerprint recognition units 2 are connected and configured to make the fingerprint recognition units 2 have a second operation voltage, which is greater than the first operation voltage.
The display device provided by the embodiment of the application comprises a substrate 1, a fingerprint identification unit 2, a touch control unit 3 and a boost unit 5, wherein the front projection area of the fingerprint identification unit 2 on the substrate 1 is smaller than the front projection area of the touch control unit 3 on the substrate 1 due to the high precision requirement of fingerprint identification. The inventor researches that, in some embodiments, the fingerprint recognition unit 2 and the touch unit 3 are configured with the same operating voltage, but since the orthographic projection area of the fingerprint recognition unit 2 on the substrate 1 is smaller than the orthographic projection area of the touch unit 3 on the substrate 1, the electric field formed at the fingerprint recognition unit 2 and the electric field formed at the touch unit 3 have different penetrating capacities, and in particular, the electric field formed at the fingerprint recognition unit 2 is harder to penetrate the display device, thereby affecting the sensitivity of fingerprint recognition. Meanwhile, in some embodiments, in order to protect the display device, the surface of the existing display device generally needs to be attached with a protective film/cover plate, which also affects the penetration ability of the electric field formed at the fingerprint recognition unit 2.
In the embodiment of the present application, the booster unit 5 is added to the display device, where the booster unit 5 is connected to the fingerprint recognition unit 2, and the booster unit 5 is configured to make the fingerprint recognition unit 2 have a second working voltage that is greater than a first working voltage that the touch unit 3 has, as the unit can know according to the formula "Q (charge amount) =c (capacitance) ×v (voltage)", compared with the embodiment where the same working voltages are configured for the fingerprint recognition unit 2 and the touch unit 3 as described above, in the embodiment of the present application, since the second working voltage configured for the fingerprint recognition unit 2 is greater than the first working voltage configured for the touch unit 3, in a unit time, the charge amount accumulated on the fingerprint recognition unit 2 is greater than the charge amount accumulated on the touch unit 3, so that the electric field strength of the electric field formed at the fingerprint recognition unit 2 is greater, thereby increasing the penetration capability of the electric field formed at the fingerprint recognition unit 2, and improving the sensitivity of fingerprint recognition.
The substrate 1 may be a hard substrate such as a glass substrate; the flexible substrate can also be made of polyimide, polystyrene, polyethylene terephthalate, parylene, polyethersulfone or polyethylene naphthalate. The substrate 1 is mainly used for supporting devices arranged thereon.
The fingerprint recognition unit 2 and the touch control unit 3 are at least partially arranged in the same layer, namely at least part of the fingerprint recognition unit 2 and at least part of the touch control unit 3 can be formed by the same process, and materials adopted by the fingerprint recognition unit 2 and the touch control unit 3 are the same. For example, the materials of the fingerprint recognition unit 2 and the touch unit 3 may be made of transparent materials, such as ITO (Indium Tin Oxide), or metals, such as silver, aluminum, copper, molybdenum, and the like, without particular limitation.
Referring to fig. 2 to 5, in some alternative embodiments, the boost unit 5 includes an inductor L, a diode D, a switch S, a capacitor C, and a load resistor R; the first end of inductance L is connected with power V 'S positive pole electricity, and inductance L' S second end is connected with diode D 'S positive pole and switch S' S first end electricity, and diode D 'S negative pole is connected with capacitor C' S first pole and resistance 'S first end electricity, and capacitor C' S second pole, switch S 'S second end and resistance' S second end are connected with power V 'S negative pole electricity, and resistance R' S first end is connected with fingerprint identification unit 2 electricity.
The working flow of the boosting unit 5 is as follows:
as shown in fig. 3a, when the switch S is in an on state, the diode D is turned off, and the current flows to the following states: from the positive pole of the power supply V, through the inductor L and the switch S, to the negative pole of the power supply V. The inductance L may accumulate energy by receiving current from the power supply V.
As shown in fig. 3b, with switch S in the off state, diode D may be turned on and additional energy from inductor L may be used to boost the voltage. Energy from the power source V and the inductance L may power the load resistor R and may charge the capacitance C.
As shown in fig. 3c, in case the switch S is in the conductive state again, the inductance L accumulates energy by starting again from the power supply V. Since the capacitor C is charged when the switch S is in the off state, the capacitor C can be discharged when the switch S is in the on state again, and the discharge energy of the capacitor C can supply power to the load resistor R.
The boosting process of the boosting unit 5 is an energy transfer process of the inductor L. When the switch S is closed, the inductor L is charged, and at this time, the inductor L absorbs energy, and when the switch S is in the on state again, the capacitor C can be discharged, and the discharging energy of the capacitor C can supply power to the load resistor R. If the inductance of the inductance L is large enough and the frequency of the PWM (Pulse Width Modulation ) is used to meet the requirement, the output terminal electrically connected to the fingerprint recognition unit 2 can continuously supply electric charge to the fingerprint recognition unit 2 during the process of alternately placing the switch S in one of the off state and the on state, i.e., the voltage of the fingerprint recognition unit 2 can be increased, so that the electric field strength of the electric field formed at the fingerprint recognition unit 2 is larger, thereby increasing the penetration capability of the electric field formed at the fingerprint recognition unit 2 and improving the sensitivity of fingerprint recognition.
Optionally, the control terminal of the switch S is used for receiving the PWM signal, i.e. the switch S may be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or a JFET (Junction Field-Effect Transistor) switch S transistor controlled by the PWM signal. The PWM signal works by switching the transistor very quickly, typically thousands of times per second. The PWM signal source may be an Arduino microcontroller or 555 timer.
Of course, the booster unit 5 is not limited to the above-described circuit configuration, and may be any other circuit according to actual needs, and is not particularly limited. For example, in the booster circuit shown in fig. 4, a first terminal of the transistor T1 is electrically connected to a first pole of the capacitor C1, a second pole of the capacitor C1 is electrically connected to a second terminal of the transistor T2, a first terminal of the transistor T2 is electrically connected to an anode of the diode D1, a cathode of the diode D1 is electrically connected to a second terminal of the transistor T1, and the first pole of the capacitor C1 is electrically connected to the fingerprint recognition unit 2.
Alternatively, in the boost circuit shown in fig. 5, the first end of the inductor L1 is electrically connected to the first pole of the capacitor C1 and the first pole of the capacitor C2, the second pole of the capacitor C1 and the second pole of the capacitor C2 are grounded, the first pole of the capacitor C1 and the first pole of the capacitor C2 are electrically connected to the input end of the chip, the second end of the inductor L1 is electrically connected to the power supply external inductor end of the chip, the output end of the chip is electrically connected to the first poles of the two capacitors C3, the second poles of the two capacitors C3 are grounded, the first poles of the two capacitors C3 are electrically connected to the first end of the resistor R1, the second end of the resistor R1 is electrically connected to the output voltage feedback pin of the chip and the first end of the resistor R2, the second end of the resistor R2 is grounded, and the first end of the resistor R1 is electrically connected to the fingerprint identification unit 2.
In order to transmit signals to the touch unit 3 and the fingerprint recognition unit 2, referring to fig. 1, in some alternative embodiments, the display device further includes a first control chip 4, and the touch unit 3 and the fingerprint recognition unit 2 are electrically connected to the same first control chip 4; the boosting unit 5 is built in the first control chip 4.
It can be appreciated that in the present embodiment, the touch unit 3 and the fingerprint recognition unit 2 share one first control chip 4 to reduce cost and save space. Since there is only one first control chip 4, the booster unit 5 may be directly built in the first control chip 4, and boost the signal sent by the first control chip 4 to the fingerprint recognition unit 2.
Of course, in addition to the boost unit 5 being built in the first control chip 4, other components or circuits through which signals are transmitted may be further included, for example, referring to fig. 6, the display device further includes the first control chip 4 and a driving circuit, and the touch unit 3 and the fingerprint recognition unit 2 are electrically connected to the same first control chip 4 through the driving circuit respectively; the booster unit 5 is built in a drive circuit.
Considering that the touch unit 3 and the fingerprint recognition unit 2 are electrically connected to the same first control chip 4 through driving circuits, the driving circuits of the touch unit 3 and the fingerprint recognition unit 2 are also integrated together, so as to save space and cost. In the present embodiment, the boosting unit 5 may be incorporated in a driving circuit, and boost the signal transmitted from the first control chip 4 to the fingerprint recognition unit 2.
In order to avoid mutual interference between touch control and fingerprint recognition of the display device, referring to fig. 7, in some alternative embodiments, the display device further includes a first control chip 41 and a second control chip 42, the fingerprint recognition unit 2 is electrically connected to the first control chip 41, and the touch control unit 3 is electrically connected to the second control chip 42; the boosting unit 5 is built in the first control chip 41.
It will be appreciated that the first control chip 41 is configured to send a fingerprint identification signal to the fingerprint identification unit 2, and the second control chip 42 is configured to send a touch signal to the touch unit 3, so, in order to boost the signal received by the fingerprint identification unit 2, the booster unit 5 may be built in the first control chip 41, so that the fingerprint identification signal is sent while the fingerprint identification signal is sent, so that the electric field strength of the electric field formed at the fingerprint identification unit 2 is greater, thereby increasing the penetration capability of the electric field formed at the fingerprint identification unit 2 and improving the sensitivity of fingerprint identification.
Of course, in addition to the first control chip 41, the booster unit 5 may be built in another component or circuit through which the signal is transmitted, for example, the booster unit 5 may be built in the first driving circuit of the fingerprint recognition unit 2.
Referring to fig. 8, the display device further includes a first control chip 41, a second control chip 42, a first driving circuit and a second driving circuit, the fingerprint identification unit 2 is electrically connected to the first control chip 41 through the first driving circuit, and the touch control unit 3 is electrically connected to the second control chip 42 through the second driving circuit; the boosting unit 5 is built in the first driving circuit.
In this embodiment, in order to avoid the interference between the first driving circuit and the second driving circuit, the first driving circuit and the second driving circuit may be respectively disposed on two opposite sides of the first conductive layer 2, and in this embodiment, since the driving circuits of the touch unit 3 and the fingerprint recognition unit 2 are respectively disposed, the voltage boosting unit 5 may be disposed in the first driving circuit, so long as the voltage signal input to the fingerprint recognition unit 2 is pressurized.
Further, the booster unit 5 described above has a signal input terminal (not shown in the figure) electrically connected to the first control chip 4/41 and a signal output terminal (not shown in the figure) electrically connected to the fingerprint recognition unit 2, wherein the voltage received by the signal input terminal is smaller than the voltage outputted by the signal output terminal. In some embodiments, the voltage received by the signal input terminal is the first operating voltage described above, and the voltage output by the signal output terminal is the second operating voltage described above.
In some alternative embodiments, the fingerprint recognition unit 2 includes a first fingerprint recognition electrode 21 and a second fingerprint recognition electrode 22 disposed opposite to each other in the thickness direction of the substrate 1, and the voltage boosting unit 5 is electrically connected to one of the first fingerprint recognition electrode 21 and the second fingerprint recognition electrode 22.
In this embodiment, the fingerprint recognition unit 2 adopts a mutual capacitance structure, that is, one of the first fingerprint recognition electrode 21 and the second fingerprint recognition electrode 22 is an induction unit, and the other is a driving unit, so as to form a mutual capacitance C structure, thereby realizing the fingerprint recognition function of the display device.
Alternatively, the first fingerprint recognition electrodes 21 extend in the first direction X and are arranged in the second direction Y, and the second fingerprint recognition electrodes 22 extend in the second direction Y and are arranged in the first direction X.
The booster unit 5 needs to be connected to one of the first fingerprint recognition electrode 21 and the second fingerprint recognition electrode 22 as a driving unit to increase the voltage of the driving unit so that the electric field strength of the electric field formed between the first fingerprint recognition electrode 21 and the second fingerprint recognition electrode 22 is larger, thereby increasing the penetration capability of the electric field formed at the fingerprint recognition unit 2 and improving the sensitivity of fingerprint recognition.
Alternatively, the fingerprint recognition unit 2 may also adopt a self-capacitance structure, optionally, the fingerprint recognition unit 2 includes a fingerprint recognition electrode, and the voltage boosting unit 5 is electrically connected with one end of the fingerprint recognition electrode to increase the voltage of the fingerprint recognition electrode, so that the electric field strength of the electric field formed at the fingerprint recognition electrode is greater, thereby increasing the penetration capability of the electric field formed at the fingerprint recognition unit 2 and improving the sensitivity of fingerprint recognition.
In some alternative embodiments, the display device further comprises a fingerprint detection trace and a touch detection trace, the fingerprint detection trace being electrically connected with the fingerprint identification unit 2, the touch detection trace being electrically connected with the touch unit 3, wherein: the fingerprint detection wiring and the touch detection wiring are at least partially arranged on the same layer.
In this embodiment, the fingerprint detection trace and the touch detection trace may be formed by the same process, and the materials used for the fingerprint detection trace and the touch detection trace are the same, so as to reduce the production cost, and since the fingerprint detection trace and the touch detection trace are arranged on the same layer, the fingerprint detection trace does not need to be electrically connected with the touch unit 3 or the fingerprint identification unit 2 through a via hole, so that the impedance is reduced, and the signal loss is reduced.
On the other hand, considering that the wiring space is limited, the fingerprint detection wiring and the touch detection wiring can be arranged on another layer, namely, the fingerprint detection wiring and the touch detection wiring are arranged on different layers, so that the wiring is facilitated.
In some alternative embodiments, the touch unit 3 includes a first touch electrode 31 and a second touch electrode 32 disposed opposite to each other in the thickness direction, and the touch detection trace is electrically connected to one of the first touch electrode 31 and the second touch electrode 32.
In the present embodiment, the touch unit 3 adopts a mutual capacitance structure, that is, one of the first touch electrode 31 and the second touch electrode 32 is a sensing unit, and the other is a driving unit, so as to form a mutual capacitance structure, thereby realizing the touch function of the display device.
Alternatively, the first touch electrode 31 extends along the first direction X and is arranged along the second direction Y, and the second touch electrode 32 extends along the second direction Y and is arranged along the first direction X.
The touch detection trace is electrically connected to one of the first touch electrode 31 and the second touch electrode 32 to provide a touch signal to the touch unit 3.
Or, the touch unit 3 comprises a touch electrode, the touch detection wire is electrically connected with one end of the touch electrode, namely, the touch unit 3 adopts a self-capacitance structure, and the arrangement is convenient.
Alternatively, the touch electrodes may be arranged in an array along the first direction X and the second direction Y.
In some alternative embodiments, the display device further includes a first conductive layer 2 disposed on one side of the substrate 1, where at least a portion of the fingerprint recognition unit 2, at least a portion of the touch unit 3, and the first conductive layer 2 are disposed on the same layer.
Optionally, the first conductive layer 2 further includes a first wire d1 and a second wire d2, where the first wire d1 is electrically connected to the touch unit 3, and the second wire d2 is electrically connected to the fingerprint identification unit 2.
It should be noted that, in this embodiment, the first conductive layer 2 further includes a first trace d1 and a second trace d2, that is, the first trace d1 and the second trace d2 are disposed on the same layer, the first trace d1 and the second trace d2 may be formed by the same process, and materials adopted by the first trace d1 and the second trace d2 are the same, so as to reduce the production cost, and since the first trace d1 and the second trace d2 are disposed on the same layer, it is not necessary to be electrically connected with the touch unit 3 or the fingerprint recognition unit 2 through a via hole, so that the impedance is reduced, and the signal loss is reduced.
On the other hand, in view of the limited wiring space of the first conductive layer 2, the first wiring d1 or the second wiring d2 may be provided to the other conductive layer to facilitate wiring.
Optionally, the first conductive layer 2 further includes a first trace d1, where the first trace d1 is electrically connected to the touch unit 3; the display device further comprises a second conductive layer, the second conductive layer is arranged between the first conductive layer 2 and the substrate 1, the second conductive layer comprises a second wire d2, and the second wire d2 is electrically connected with the fingerprint identification unit 2.
It can be understood that in this embodiment, the first wires d1 and the second wires d2 are arranged in different layers, so as to increase the wiring space, so as to avoid mutual interference between the first wires d1 and the second wires d2, and the second wires d2 and the fingerprint recognition unit 2 can be connected through vias. The material of the second conductive layer may be the same as that of the first conductive layer 2 to reduce costs. Different materials can be selected according to actual needs for preparation, and the preparation method is not particularly limited.
When the touch unit 3 and the fingerprint identification unit 2 both adopt mutual capacitance structures, the corresponding first trace d1 includes a first sub-trace and a second sub-trace, one of the first sub-trace and the first touch electrode 31 is electrically connected with one of the second touch electrodes 32, and the other of the second sub-trace and the first touch electrode 31 is electrically connected with the other of the second touch electrodes 32. The second trace d2 includes a third sub-trace and a fourth sub-trace, the third sub-trace is electrically connected to one of the first fingerprint recognition electrode 21 and the second fingerprint recognition electrode 22, and the fourth sub-trace is electrically connected to the other of the first fingerprint recognition electrode 21 and the second fingerprint recognition electrode 22.
When the fingerprint identification unit 2 and the touch control unit 3 both adopt self-capacitance structures. The first control chip 4 or the second control chip 42 sends a driving signal to the fingerprint identification unit 2 through the second wire d2, and transmits an induction signal back to the first control chip 4 or the second control chip 42 through the same second wire d2, so that the fingerprint identification unit 2 and the booster unit 5 are only required to be connected.
In some alternative embodiments, the plurality of touch units 3 have a first density and the plurality of fingerprint recognition units 2 have a second density, the first density being less than the second density.
In this embodiment, the first density of the touch units 3 may be adjusted by adjusting the size of the interval between the adjacent touch units 3, and the smaller the interval between the adjacent touch units 3 is, the larger the first density is, or the first density may be adjusted by adjusting the size of the touch units 3, which is not particularly limited. Similarly, the second density may also be adjusted by adjusting the interval between adjacent fingerprint recognition units 2 or the like to improve the sensitivity of the fingerprint recognition function of the fingerprint recognition unit 2.
Optionally, the display device further includes a display layer disposed on one side of the substrate 1, where the display layer may be an Organic Light-Emitting Diode (OLED) display layer, a quantum dot Light-Emitting Diode (Quantum Dot Light Emitting Diodes, QLED) or a Micro-flat display layer (Micro-OLED or Micro-LED).
The display device provided by the embodiment of the application can be applied to a mobile phone and can also be any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, touch interactive terminal, etc., which are not particularly limited in this embodiment of the application.
In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present application, and they should be included in the scope of the present application.
It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.

Claims (10)

1. A display device having a first region and a second region disposed at least partially around the first region, the display device comprising:
a substrate;
the fingerprint identification units are arranged on the same side of the substrate, the fingerprint identification units are arranged in the first area, the touch control units are arranged in the second area, the orthographic projection area of the fingerprint identification units on the substrate is smaller than the orthographic projection area of the touch control units on the substrate, and the touch control units have a first working voltage;
and the boosting unit is connected with the fingerprint identification units and is configured to enable the fingerprint identification units to have a second working voltage, and the second working voltage is larger than the first working voltage.
2. The display device according to claim 1, further comprising a first control chip, wherein the touch unit and the fingerprint recognition unit are electrically connected to the same first control chip, respectively;
the boosting unit is arranged in the first control chip.
3. The display device according to claim 1, further comprising a first control chip and a driving circuit, wherein the touch unit and the fingerprint recognition unit are electrically connected to the same first control chip through the driving circuit, respectively;
the boosting unit is arranged in the driving circuit.
4. The display device of claim 1, further comprising a first control chip and a second control chip, wherein the fingerprint recognition unit is electrically connected to the first control chip, and wherein the touch unit is electrically connected to the second control chip;
the boosting unit is arranged in the first control chip.
5. The display device according to claim 1, further comprising a first control chip, a second control chip, a first driving circuit, and a second driving circuit, wherein the fingerprint recognition unit is electrically connected to the first control chip through the first driving circuit, and the touch control unit is electrically connected to the second control chip through the second driving circuit;
the boosting unit is arranged in the first driving circuit.
6. The display device according to claim 1, wherein:
the fingerprint identification unit comprises a first fingerprint identification electrode and a second fingerprint identification electrode which are oppositely arranged in the thickness direction of the substrate, and the voltage boosting unit is electrically connected with one of the first fingerprint identification electrode and the second fingerprint identification electrode; or alternatively, the first and second heat exchangers may be,
the fingerprint identification unit comprises a fingerprint identification electrode, and the voltage boosting unit is electrically connected with one end of the fingerprint identification electrode.
7. The display device of claim 6, further comprising a fingerprint detection trace and a touch detection trace, the fingerprint detection trace being electrically connected to the fingerprint identification unit, the touch detection trace being electrically connected to the touch unit, wherein:
the fingerprint detection wiring and the touch detection wiring are at least partially arranged on the same layer; or alternatively, the first and second heat exchangers may be,
the fingerprint detection wiring and the touch detection wiring are arranged on different layers.
8. The display device according to claim 7, wherein:
the touch control unit comprises a first touch control electrode and a second touch control electrode which are oppositely arranged in the thickness direction, and the touch control detection wire is electrically connected with one of the first touch control electrode and the second touch control electrode; or alternatively, the first and second heat exchangers may be,
the touch control unit comprises a touch control electrode, and the touch control detection wiring is electrically connected with one end of the touch control electrode.
9. The display device according to any one of claims 2 to 5, wherein the voltage boosting unit has a signal input terminal electrically connected to the first control chip and a signal output terminal electrically connected to the fingerprint recognition unit, wherein a voltage received by the signal input terminal is smaller than a voltage outputted by the signal output terminal;
preferably, the voltage received by the signal input end is a first working voltage, and the voltage output by the signal output end is a second working voltage.
10. The display device of claim 1, wherein a plurality of the touch units have a first density and a plurality of the fingerprint recognition units have a second density, the first density being less than the second density;
preferably, the boost unit includes an inductor, a diode, a switch, a capacitor, and a load resistor, wherein:
the first end of the inductor is electrically connected with the positive electrode of the power supply, the second end of the inductor is electrically connected with the anode of the diode and the first end of the switch, the cathode of the diode is electrically connected with the first electrode of the capacitor and the first end of the resistor, the second electrode of the capacitor, the second end of the switch and the second end of the resistor are electrically connected with the negative electrode of the power supply, and the first end of the resistor is electrically connected with the fingerprint identification unit;
preferably, the control end of the switch is used for receiving a pulse width modulation signal;
preferably, the switch is a metal-oxide semiconductor field effect transistor or a junction field effect transistor.
CN202310797212.6A 2023-06-30 2023-06-30 display device Pending CN116844195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310797212.6A CN116844195A (en) 2023-06-30 2023-06-30 display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310797212.6A CN116844195A (en) 2023-06-30 2023-06-30 display device

Publications (1)

Publication Number Publication Date
CN116844195A true CN116844195A (en) 2023-10-03

Family

ID=88166408

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310797212.6A Pending CN116844195A (en) 2023-06-30 2023-06-30 display device

Country Status (1)

Country Link
CN (1) CN116844195A (en)

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