Display device

Abstract

The application discloses a display device, the display device has a first area and a second area arranged at least partially around the first area, and the display device comprises: a substrate; a plurality of fingerprint identification units and a plurality of touch units arranged on the same side of the substrate, the fingerprint identification units are arranged in the first area, the touch units are arranged in the second area, the area of the orthographic projection of the fingerprint identification units on the substrate is smaller than the area of the orthographic projection of the touch units on the substrate, the touch units have a first working voltage; a voltage boosting unit, the voltage boosting unit is connected with the plurality of fingerprint identification units and is configured to make the fingerprint identification units have a second working voltage, the second working voltage is greater than the first working voltage. By adding the voltage boosting unit in the display device, the electric field strength of the electric field formed at the fingerprint identification units is greater, so that the penetration ability of the electric field formed at the fingerprint identification units is increased, and the sensitivity of fingerprint identification is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic products, and particularly relates to a display device. BACKGROUND

[0002] With the continuous development of electronic technology, more and more application scenarios in life need to use display devices. Therefore, how to ensure the reliability of signal transmission in the display device is a problem to be solved at present. SUMMARY

[0003] In order to solve the above problems or other problems, the present application provides the following technical scheme.

[0004] The embodiment of the present application provides a display device, which has a first area and a second area arranged at least partially around the first area, and the display device comprises: a substrate; a plurality of fingerprint identification units and a plurality of touch units arranged on the same side of the substrate, the fingerprint identification units are arranged in the first area, and the touch units are arranged in the second area; the area of the projection of the fingerprint identification units on the substrate is smaller than the area of the projection of the touch units on the substrate; the touch units have a first working voltage; a voltage boosting unit is connected with the plurality of fingerprint identification units and is configured to make the fingerprint identification units have a second working voltage, and the second working voltage is greater than the first working voltage.

[0005] According to one aspect of the present application, a first control chip is further included, and the touch units and the fingerprint identification units are respectively electrically connected with the same first control chip; and the voltage boosting unit is built in the first control chip.

[0006] According to one aspect of the present application, a first control chip and a driving circuit are further included, and the touch units and the fingerprint identification units are respectively electrically connected with the same first control chip through the driving circuit; and the voltage boosting unit is built in the driving circuit.

[0007] According to one aspect of the present application, a first control chip and a second control chip are further included, the fingerprint identification units are electrically connected with the first control chip, and the touch units are electrically connected with the second control chip; and the voltage boosting unit is built in the first control chip.

[0008] According to one aspect of the present application, a first control chip, a second control chip, a first driving circuit and a second driving circuit are further included, the fingerprint identification units are electrically connected with the first control chip through the first driving circuit, and the touch units are electrically connected with the second control chip through the second driving circuit; and the voltage boosting unit is built in the first driving circuit.

[0009] According to an aspect of the present application, wherein: the fingerprint identification unit comprises a first fingerprint identification electrode and a second fingerprint identification electrode 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 identification unit comprises a fingerprint identification electrode, and the voltage boosting unit is electrically connected with one end of the fingerprint identification electrode.

[0010] According to an aspect of the present application, the display device further comprises a fingerprint detection trace and a touch detection trace, the fingerprint detection trace is electrically connected with the fingerprint identification unit, and the touch detection trace is electrically connected with the touch unit, wherein: the fingerprint detection trace and the touch detection trace are arranged at least partially in the same layer; or, the fingerprint detection trace and the touch detection trace are arranged in different layers.

[0011] According to an aspect of the present application, wherein: the touch unit comprises a first touch electrode and a second touch electrode oppositely arranged in the thickness direction, and the touch detection trace is electrically connected with one of the first touch electrode and the second touch electrode; or, the touch unit comprises a touch electrode, and the touch detection trace is electrically connected with one end of the touch electrode.

[0012] According to an aspect of the present application, the voltage boosting unit has a signal input end and a signal output end, the signal input end is electrically connected with the first control chip, and the signal output end is electrically connected with the fingerprint identification unit, wherein the voltage received by the signal input end is less than the voltage outputted by the signal output end; preferably, the voltage received by the signal input end is a first working voltage, and the voltage outputted by the signal output end is a second working voltage.

[0013] According to an aspect of the present application, a plurality of the touch units have a first density, and a plurality of the fingerprint identification units have a second density, the first density is less than the second density; preferably, the voltage boosting unit comprises an inductor, a diode, a switch, a capacitor and a load resistor, wherein: a first end of the inductor is electrically connected with a positive pole of a power supply, a second end of the inductor is electrically connected with an anode of the diode and a first end of the switch, a cathode of the diode is electrically connected with a first pole of the capacitor and a first end of the resistor, a second pole of the capacitor, a second end of the switch and a second end of the resistor are electrically connected with a negative pole of the power supply, and the first end of the resistor is electrically connected with the fingerprint identification unit; preferably, a 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.

[0014] Compared with the related art, the embodiment of the present application adds a boosting unit in the display device, wherein the boosting unit is connected with the fingerprint identification unit, and the boosting unit is configured to make the fingerprint identification unit have a second working voltage which is greater than a first working voltage that the touch unit has. Since the second working voltage configured to the fingerprint identification unit is greater than the first working voltage configured to the touch unit, the amount of charge accumulated on the fingerprint identification unit is greater than the amount of charge accumulated on the touch unit in a unit time, so that the electric field strength of the electric field formed at the fingerprint identification unit is greater, thereby increasing the penetration ability of the electric field formed at the fingerprint identification unit and improving the sensitivity of fingerprint identification. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0016] Figure 1 is a structural schematic diagram of a display device provided by an embodiment of the present application;

[0017] Figure 2 is a circuit schematic diagram of a boosting unit provided by an embodiment of the present application;

[0018] Figures 3a-3c is a circuit schematic diagram of a boosting unit in a working state provided by an embodiment of the present application;

[0019] Figure 4 is a circuit schematic diagram of a boosting unit provided by another embodiment of the present application;

[0020] Figure 5 is a circuit schematic diagram of a boosting unit provided by another embodiment of the present application;

[0021] Figure 6 is a structural schematic diagram of a display device provided by another embodiment of the present application;

[0022] Figure 7 is a structural schematic diagram of a display device provided by another embodiment of the present application;

[0023] Figure 8 is a structural schematic diagram of a display device provided by another embodiment of the present application.

[0024] In the drawings:

[0025] 1 - substrate; 2 - fingerprint identification unit; 21 - first fingerprint identification electrode; 22 - second fingerprint identification electrode; 3 - touch unit; 31 - first touch electrode; 32 - second touch electrode; 4 - first control chip; 41 - first control chip; 42 - second control chip; 5 - voltage boosting unit; d1 - first trace; d2 - second trace; A1 - first area; A2 - second area; X - first direction; Y - second direction. DETAILED DESCRIPTION

[0026] Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order not to unnecessarily obscure the present application.

[0027] It is to be understood that the terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting. It will be apparent to one of ordinary skill in the art that aspects of the present application can be practiced in other aspects which are not currently described, utilize other elements in conjunction with or in place of those described, and without the use of some or all of the specific features. It is therefore contemplated to this end that the application should not be limited to the particular aspects described.

[0028] For a better understanding of the present application, reference will be made to the following Figures 1 to 8 A display device according to an embodiment of the present application is described in detail.

[0029] Referring to Figure 1 , Figure 1 is a structural schematic diagram of a display device according to an embodiment of the present application.

[0030] The embodiment of the present application provides a display device, which has a first area A1 and a second area A2 arranged at least partially around the first area A1, and the display device comprises: a substrate 1; a fingerprint identification unit 2 and a touch unit 3 arranged on the same side of the substrate 1, the fingerprint identification unit 2 and the touch unit 3 are arranged at least partially in the same layer, the fingerprint identification unit 2 is arranged in the first area A1, the touch unit 3 is arranged in the second area A2, the area of the orthogonal projection of the fingerprint identification unit 2 on the substrate 1 is smaller than the area of the orthogonal projection of the touch unit 3 on the substrate 1, and the touch unit 3 has a first working voltage; and a voltage boosting unit 5, which is connected with the plurality of fingerprint identification units 2 and is configured to make the fingerprint identification unit 2 have a second working voltage, and the second working voltage is greater than the first working voltage.

[0031] The display device provided by the embodiment of the present application comprises the substrate 1, the fingerprint identification unit 2, the touch unit 3 and the voltage boosting unit 5, due to the high-precision requirement of fingerprint identification, the area of the orthogonal projection of the fingerprint identification unit 2 on the substrate 1 is smaller than the area of the orthogonal projection of the touch unit 3 on the substrate 1. It is found by the inventor of the present application that, in some embodiments, the same working voltage is configured for the fingerprint identification unit 2 and the touch unit 3, but due to the fact that the area of the orthogonal projection of the fingerprint identification unit 2 on the substrate 1 is smaller than the area of the orthogonal projection of the touch unit 3 on the substrate 1, the penetration ability of the electric field formed at the fingerprint identification unit 2 and the electric field formed at the touch unit 3 is different, specifically, the electric field formed at the fingerprint identification unit 2 is more difficult to penetrate the display device, thereby affecting the sensitivity of fingerprint identification. Meanwhile, in some embodiments, in order to protect the display device, the surface of the existing display device usually needs to be attached with a protective film / cover plate, which also affects the penetration ability of the electric field formed at the fingerprint identification unit 2.

[0032] The embodiment of the present application adds the voltage boosting unit 5 in the display device, wherein the voltage boosting unit 5 is connected with the fingerprint identification unit 2, and the voltage boosting unit 5 is configured to make the fingerprint identification unit 2 have a second working voltage, and the second working voltage is greater than the first working voltage of the touch unit 3. According to the formula "Q (charge amount) = C (capacitance) * V (voltage)", compared with the above-mentioned embodiment in which the same size working voltage is configured for the fingerprint identification unit 2 and the touch unit 3, in the embodiment of the present application, since the second working voltage configured for the fingerprint identification unit 2 is greater than the first working voltage configured for the touch unit 3, the amount of charge accumulated on the fingerprint identification unit 2 in unit time is greater than the amount of charge accumulated on the touch unit 3, so that the electric field strength of the electric field formed at the fingerprint identification unit 2 is greater, thereby increasing the penetration ability of the electric field formed at the fingerprint identification unit 2 and improving the sensitivity of fingerprint identification.

[0033] The substrate 1 can be a rigid substrate, such as a glass substrate, or a flexible substrate made of polyimide, polystyrene, polyethylene terephthalate, parylene, polyethersulfone, or polyethylene naphthalate. The substrate 1 is mainly used to support the device disposed thereon.

[0034] The fingerprint recognition unit 2 and the touch unit 3 are at least partially disposed in the same layer, i.e., at least part of the fingerprint recognition unit 2 and at least part of the touch unit 3 can be formed by the same process, and the fingerprint recognition unit 2 and the touch unit 3 adopt the same material. For example, the material of the fingerprint recognition unit 2 and the touch unit 3 can be made of a transparent material, such as ITO (Indium Tin Oxide), or a metal, such as silver, aluminum, copper, molybdenum, etc., without special limitation.

[0035] Please refer to Figures 2 to 5 In some optional 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 the inductor L is electrically connected to the positive pole of the power supply V, the second end of the inductor L is electrically connected to the anode of the diode D and the first end of the switch S, the cathode of the diode D is electrically connected to the first pole of the capacitor C and the first end of the resistor R, the second pole of the capacitor C, the second end of the switch S, and the second end of the resistor R are electrically connected to the negative pole of the power supply V, and the first end of the resistor R is electrically connected to the fingerprint recognition unit 2.

[0036] The working process of the boost unit 5 is as follows:

[0037] As shown in Figure 3a , when the switch S is in the on state, the diode D is off, and the current flow can be: 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 inductor L can accumulate energy by receiving current from the power supply V.

[0038] As shown in Figure 3b , when the switch S is in the off state, the diode D can be turned on, and the additional energy from the inductor L can be used to increase the voltage. The energy from the power supply V and the inductor L can power the load resistor R, and can charge the capacitor C.

[0039] As shown in Figure 3c , when the switch S is in the on state again, the inductor L starts to accumulate energy again by receiving current from the power supply V. Since the capacitor C is charged when the switch S is in the off state, when the switch S is in the on state again, the capacitor C can be discharged, and the discharge energy of the capacitor C can power the load resistor R.

[0040] 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. When the switch S is turned on again, the capacitor C can be discharged, and the discharge energy of the capacitor C can supply power to the load resistor R. If the inductance of the inductor L is large enough and the frequency of the PWM (Pulse Width Modulation) used meets the requirements, the output end electrically connected to the fingerprint identification unit 2 can continuously provide charges to the fingerprint identification unit 2 in the process that the switch S alternately stays in one of the two states of the off state and the on state, that is, the voltage of the fingerprint identification unit 2 can be increased, so that the electric field strength of the electric field formed at the fingerprint identification unit 2 is larger, thereby increasing the penetration ability of the electric field formed at the fingerprint identification unit 2 and improving the sensitivity of the fingerprint identification.

[0041] Optionally, the control end of the switch S is used to receive a pulse width modulation signal, that is, the switch S can be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or a JFET (Junction Field-Effect Transistor) switch S transistor controlled by a PWM signal. The PWM signal works by switching the transistor very quickly, usually thousands of times per second. The PWM signal source can be an Arduino microcontroller or a 555 timer.

[0042] Of course, the boosting unit 5 is not limited to the above-mentioned circuit structure, and other forms of circuits can also be used according to actual needs, and there is no special limitation. For example, in the boosting circuit as shown in Figure 4 The first end of the transistor T1 and the first pole of the capacitor C1 are electrically connected, the second pole of the capacitor C1 and the second end of the transistor T2 are electrically connected, the first end of the transistor T2 and the anode of the diode D1 are electrically connected, the cathode of the diode D1 and the second end of the transistor T1 are electrically connected, and the first pole of the capacitor C1 and the fingerprint identification unit 2 are electrically connected.

[0043] Alternatively, in the boosting circuit as shown in Figure 5The first end of the inductor L1, the first pole of the capacitor C1 and the first pole of the capacitor C2 are electrically connected, 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 with the input end of the chip, the second end of the inductor L1 is electrically connected with the power supply external inductance end of the chip, the output end of the chip is electrically connected with 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 with the first end of the resistor R1, the second end of the resistor R1 is electrically connected with the output voltage feedback pin of the chip and the first end of the resistor R2 respectively, the second end of the resistor R2 is grounded, and the first end of the resistor R1 is electrically connected with the fingerprint identification unit 2.

[0044] In order to transmit signals to the touch unit 3 and the fingerprint identification unit 2, please refer to Figure 1 In some optional embodiments, the display device further comprises a first control chip 4, and the touch unit 3 and the fingerprint identification unit 2 are electrically connected with the same first control chip 4 respectively; and the boost unit 5 is built-in the first control chip 4.

[0045] It can be understood that in the embodiment, the touch unit 3 and the fingerprint identification unit 2 share one first control chip 4 to reduce cost and save space. Since there is only one first control chip 4, the boost unit 5 can be directly built-in the first control chip 4, and the signal sent by the first control chip 4 to the fingerprint identification unit 2 can be boosted.

[0046] Of course, in addition to building the boost unit 5 in the first control chip 4, the boost unit 5 can also be built in other components or circuits through which the signal is transmitted, for example, please refer to Figure 6 The display device further comprises a first control chip 4 and a driving circuit, and the touch unit 3 and the fingerprint identification unit 2 are electrically connected with the same first control chip 4 through the driving circuit; and the boost unit 5 is built-in the driving circuit.

[0047] Considering that the touch unit 3 and the fingerprint identification unit 2 are electrically connected with the same first control chip 4 through the driving circuit, the driving circuits of the touch unit 3 and the fingerprint identification unit 2 are also integrated together to save space and cost. In the embodiment, the boost unit 5 can be built-in the driving circuit to boost the signal sent by the first control chip 4 to the fingerprint identification unit 2.

[0048] In order to avoid the touch and the fingerprint identification of the display device interfering with each other, please refer to Figure 7 In some optional embodiments, the display device further comprises a first control chip 41 and a second control chip 42, the fingerprint identification unit 2 is electrically connected with the first control chip 41, and the touch unit 3 is electrically connected with the second control chip 42; and the boost unit 5 is built-in the first control chip 41.

[0049] It can be understood that the first control chip 41 is configured to send a fingerprint recognition signal to the fingerprint recognition unit 2, and the second control chip 42 is configured to send a touch signal to the touch unit 3. Therefore, in order to boost the signal received by the fingerprint recognition unit 2, the boost unit 5 can be built in the first control chip 41, so as to boost the fingerprint recognition signal while sending the fingerprint recognition signal, so that the electric field intensity of the electric field formed at the fingerprint recognition unit 2 is greater, thereby increasing the penetration ability of the electric field formed at the fingerprint recognition unit 2 and improving the sensitivity of fingerprint recognition.

[0050] Of course, in addition to building the boost unit 5 in the first control chip 41, the boost unit 5 can also be built in other components or circuits through which the signal is transmitted, for example, the boost unit 5 can also be built in the first driving circuit of the fingerprint recognition unit 2.

[0051] Please refer to Figure 8 The display device further comprises a first control chip 41, a second control chip 42, a first driving circuit and a second driving circuit, the fingerprint recognition unit 2 is electrically connected with the first driving circuit and the first control chip 41, and the touch unit 3 is electrically connected with the second driving circuit and the second control chip 42; the boost unit 5 is built in the first driving circuit.

[0052] In the embodiment, in order to avoid mutual interference of the first driving circuit and the second driving circuit, the first driving circuit and the second driving circuit can be respectively arranged on opposite sides of the first conductive layer 2. In the embodiment, since the driving circuits of the touch unit 3 and the fingerprint recognition unit 2 are respectively arranged, the boost unit 5 can be built in the first driving circuit, and the voltage signal input to the fingerprint recognition unit 2 can be boosted.

[0053] Further, the boost unit 5 described above has a signal input end (not shown in the figure) and a signal output end (not shown in the figure), the signal input end is electrically connected with the first control chip 4 / 41, and the signal output end is electrically connected with the fingerprint recognition unit 2, wherein the voltage received by the signal input end is less than the voltage output by the signal output end. In some embodiments, the voltage received by the signal input end is the first working voltage described above, and the voltage output by the signal output end is the second working voltage described above.

[0054] In some optional embodiments, the fingerprint recognition unit 2 comprises a first fingerprint recognition electrode 21 and a second fingerprint recognition electrode 22 oppositely arranged in the thickness direction of the substrate 1, and the boost unit 5 is electrically connected with one of the first fingerprint recognition electrode 21 and the second fingerprint recognition electrode 22.

[0055] In the embodiment, the fingerprint identification unit 2 adopts a mutual capacitance structure, that is, one of the first fingerprint identification electrode 21 and the second fingerprint identification electrode 22 is a sensing unit, and the other is a driving unit, to form a mutual capacitance C structure and realize the fingerprint identification function of the display device.

[0056] Optionally, the first fingerprint identification electrode 21 extends along the first direction X and is arranged along the second direction Y, and the second fingerprint identification electrode 22 extends along the second direction Y and is arranged along the first direction X.

[0057] The boosting unit 5 needs to be connected with one of the first fingerprint identification electrode 21 and the second fingerprint identification electrode 22 as the driving unit, to increase the voltage of the driving unit, so that the electric field intensity of the electric field formed between the first fingerprint identification electrode 21 and the second fingerprint identification electrode 22 is larger, thereby increasing the penetration ability of the electric field formed at the fingerprint identification unit 2 and improving the sensitivity of the fingerprint identification.

[0058] Alternatively, the fingerprint identification unit 2 can also adopt a self-capacitance structure. Optionally, the fingerprint identification unit 2 includes a fingerprint identification electrode, and the boosting unit 5 is electrically connected with one end of the fingerprint identification electrode, to increase the voltage of the fingerprint identification electrode, so that the electric field intensity of the electric field formed by the fingerprint identification electrode is larger, thereby increasing the penetration ability of the electric field formed at the fingerprint identification unit 2 and improving the sensitivity of the fingerprint identification.

[0059] In some optional embodiments, the display device further includes a fingerprint detection wire and a touch detection wire, the fingerprint detection wire is electrically connected with the fingerprint identification unit 2, and the touch detection wire is electrically connected with the touch unit 3, wherein: the fingerprint detection wire and the touch detection wire are arranged at least partially in the same layer.

[0060] In the embodiment, the fingerprint detection wire and the touch detection wire can be formed by the same process, and the fingerprint detection wire and the touch detection wire adopt the same material, to reduce the production cost, and since the fingerprint detection wire and the touch detection wire are arranged in the same layer, it is not necessary to set a via hole and electrically connect the touch unit 3 or the fingerprint identification unit 2, thereby reducing the impedance and reducing the signal loss.

[0061] On the other hand, considering the limited wiring space, the fingerprint detection wire and the touch detection wire can also be arranged in another layer, that is, the fingerprint detection wire and the touch detection wire are arranged in different layers, to facilitate the wiring.

[0062] In some optional embodiments, the touch unit 3 includes a first touch electrode 31 and a second touch electrode 32 arranged oppositely in the thickness direction, and the touch detection wire is electrically connected with one of the first touch electrode 31 and the second touch electrode 32.

[0063] In the 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, to form a mutual capacitance structure and realize the touch function of the display device.

[0064] Optionally, 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.

[0065] The touch detection wire is electrically connected with one of the first touch electrode 31 and the second touch electrode 32 to provide a touch signal for the touch unit 3.

[0066] Alternatively, the touch unit 3 includes a touch electrode, and the touch detection wire is electrically connected with one end of the touch electrode, that is, the touch unit 3 adopts a self-capacitance structure, which is convenient to arrange.

[0067] Optionally, the touch electrode can be arranged in an array along the first direction X and the second direction Y.

[0068] In some optional embodiments, the display device further includes a first conductive layer 2 arranged on one side of the substrate 1, and the at least partial fingerprint recognition unit 2 and the at least partial touch unit 3 are arranged in the same layer as the first conductive layer 2.

[0069] Optionally, the first conductive layer 2 further includes a first wire d1 and a second wire d2, the first wire d1 is electrically connected with the touch unit 3, and the second wire d2 is electrically connected with the fingerprint recognition unit 2.

[0070] It should be noted that, in the embodiment, the first conductive layer 2 further includes the first wire d1 and the second wire d2, that is, the first wire d1 and the second wire d2 are arranged in the same layer, the first wire d1 and the second wire d2 can be formed by the same process, and the materials used by the first wire d1 and the second wire d2 are the same, so as to reduce the production cost, and since the first wire d1 and the second wire d2 are arranged in the same layer, it is not necessary to set a via hole and electrically connect the touch unit 3 or the fingerprint recognition unit 2, thereby reducing the impedance and reducing the signal loss.

[0071] On the other hand, considering that the wiring space of the first conductive layer 2 is limited, the first wire d1 or the second wire d2 can also be arranged in another conductive layer to facilitate wiring.

[0072] Optionally, the first conductive layer 2 further includes the first wire d1, the first wire d1 is electrically connected with the touch unit 3; and the display device further includes a second conductive layer, the second conductive layer is arranged between the first conductive layer 2 and the substrate 1, the second conductive layer includes the second wire d2, and the second wire d2 is electrically connected with the fingerprint recognition unit 2.

[0073] It can be understood that in the embodiment, the first wiring d1 and the second wiring d2 are arranged in different layers, so as to increase the wiring space and avoid interference between the first wiring d1 and the second wiring d2. The second conductive layer can be made of the same material as the first conductive layer 2 to reduce the cost. Alternatively, different materials can be selected according to actual needs, and there is no special limitation.

[0074] When the touch unit 3 and the fingerprint identification unit 2 both adopt the mutual capacitance structure, the first wiring d1 includes a first sub-wiring and a second sub-wiring, the first sub-wiring is electrically connected with one of the first touch electrode 31 and the second touch electrode 32, and the second sub-wiring is electrically connected with the other of the first touch electrode 31 and the second touch electrode 32. The second wiring d2 includes a third sub-wiring and a fourth sub-wiring, the third sub-wiring is electrically connected with one of the first fingerprint identification electrode 21 and the second fingerprint identification electrode 22, and the fourth sub-wiring is electrically connected with the other of the first fingerprint identification electrode 21 and the second fingerprint identification electrode 22.

[0075] When the fingerprint identification unit 2 and the touch unit 3 both adopt the self-capacitance structure, the first control chip 4 or the second control chip 42 sends a driving signal to the fingerprint identification unit 2 through the second wiring d2, and transmits a sensing signal back to the first control chip 4 or the second control chip 42 through the same second wiring d2. Therefore, the fingerprint identification unit 2 and the boost unit 5 can be connected.

[0076] In some optional embodiments, the plurality of touch units 3 has a first density, and the plurality of fingerprint identification units 2 has a second density, the first density being less than the second density.

[0077] In the embodiment, the first density of the touch unit 3 can be adjusted by adjusting the interval between adjacent touch units 3. The smaller the interval between adjacent touch units 3, the greater the first density. The first density can also be adjusted by adjusting the size of the touch unit 3 and other factors, and there is no special limitation. Similarly, the second density can be adjusted by adjusting the interval between adjacent fingerprint identification units 2 and other factors to improve the sensitivity of the fingerprint identification function of the fingerprint identification unit 2.

[0078] Optionally, the display device further includes a display layer arranged on one side of the substrate 1. The display layer can be an organic light-emitting diode (OLED) display layer, a quantum dot light-emitting diode (QLED), or a micro flat panel display layer (Micro-OLED or Micro-LED), etc.

[0079] The display device provided by the embodiment of the present 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: a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a smart bracelet, smart glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal, and the like, and the embodiment of the present application does not make special limitations on this.

[0080] The above is only a specific implementation of the present application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, module and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described herein again. It should be understood that the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.

[0081] It should be further noted that the exemplary embodiments mentioned in the present application 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 steps, that is, the steps can be executed in the order mentioned in the embodiments, or can be different from the order in the embodiments, or several steps can be executed simultaneously.

Claims

1. A display device, characterized in that, The display device includes a first region and a second region disposed at least partially surrounding the first region. substrate; Multiple fingerprint recognition units and multiple touch units are disposed on the same side of the substrate. The fingerprint recognition units are disposed in the first area, and the touch units are disposed in the second area. The orthographic projection area of ​​the fingerprint recognition units on the substrate is smaller than the orthographic projection area of ​​the touch units on the substrate. The touch units have a first operating voltage. The multiple touch units have a first density, and the multiple fingerprint recognition units have a second density. The spacing between adjacent touch units is greater than the spacing between adjacent fingerprint recognition units, so that the first density is less than the second density. A first conductive layer is disposed on one side of the substrate. At least a portion of the fingerprint recognition unit, at least a portion of the touch unit, and the first conductive layer are disposed on the same layer. The first conductive layer further includes a first trace and a second trace. The first trace is electrically connected to the touch unit, and the second trace is electrically connected to the fingerprint recognition unit. A boost unit is connected to a plurality of the fingerprint recognition units and configured to give the fingerprint recognition units a second operating voltage, the second operating voltage being greater than the first operating voltage.

2. The display device according to claim 1, characterized in that, It also includes a first control chip, wherein the touch unit and the fingerprint recognition unit are respectively electrically connected to the same first control chip; The boost unit is built into the first control chip.

3. The display device according to claim 1, characterized in that, It also includes 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; The boost unit is built into the drive circuit.

4. The display device according to claim 1, characterized in that, It also includes a first control chip and a second control chip, wherein the fingerprint recognition unit is electrically connected to the first control chip and the touch unit is electrically connected to the second control chip; The boost unit is built into the first control chip.

5. The display device according to claim 1, characterized in that, It also includes a first control chip, a second control chip, a first driving circuit, and a second driving circuit. The fingerprint recognition unit is electrically connected to the first control chip through the first driving circuit, and the touch unit is electrically connected to the second control chip through the second driving circuit. The boost unit is built into the first drive circuit.

6. The display device according to claim 1, characterized in that, in: The fingerprint recognition unit includes a first fingerprint recognition electrode and a second fingerprint recognition electrode disposed opposite to each other in the thickness direction of the substrate, and the boost unit is electrically connected to one of the first fingerprint recognition electrode and the second fingerprint recognition electrode; or, The fingerprint recognition unit includes a fingerprint recognition electrode, and the boost unit is electrically connected to one end of the fingerprint recognition electrode.

7. The display device according to claim 6, characterized in that, The display device further includes fingerprint detection lines and touch detection lines. The fingerprint detection lines are electrically connected to the fingerprint recognition unit, and the touch detection lines are electrically connected to the touch unit, wherein: The fingerprint detection traces and the touch detection traces are at least partially disposed on the same layer; or... The fingerprint detection traces and the touch detection traces are arranged on different layers.

8. The display device according to claim 7, characterized in that, in: The touch unit includes a first touch electrode and a second touch electrode disposed opposite to each other in the thickness direction, and the touch detection trace is electrically connected to one of the first touch electrode and the second touch electrode; or, The touch unit includes a touch electrode, and the touch detection trace is electrically connected to one end of the touch electrode.

9. The display device according to any one of claims 2 to 5, characterized in that, The boost unit has a signal input terminal and a signal output terminal. The signal input terminal is electrically connected to the first control chip, and the signal output terminal is electrically connected to the fingerprint recognition unit. The voltage received by the signal input terminal is less than the voltage output by the signal output terminal.

10. The display device according to claim 9, characterized in that, The voltage received at the signal input terminal is the first operating voltage, and the voltage output at the signal output terminal is the second operating voltage.

11. The display device according to claim 1, characterized in that, 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 to the positive terminal of the power supply, the second end of the inductor is electrically connected to the anode of the diode and the first end of the switch, the cathode of the diode is electrically connected to the first terminal of the capacitor and the first end of the resistor, the second terminal of the capacitor, the second end of the switch and the second end of the resistor are electrically connected to the negative terminal of the power supply, and the first end of the resistor is electrically connected to the fingerprint recognition unit.

12. The display device according to claim 11, characterized in that, The control terminal of the switch is used to receive pulse width modulation signals.

13. The display device according to claim 11, characterized in that, The switch is a metal-oxide-semiconductor field-effect transistor or a junction field-effect transistor.

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