CN106843595B - Fingerprint module and embedded device of touch-sensitive screen - Google Patents
Fingerprint module and embedded device of touch-sensitive screen Download PDFInfo
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- CN106843595B CN106843595B CN201710129913.7A CN201710129913A CN106843595B CN 106843595 B CN106843595 B CN 106843595B CN 201710129913 A CN201710129913 A CN 201710129913A CN 106843595 B CN106843595 B CN 106843595B
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- 230000002093 peripheral effect Effects 0.000 claims description 5
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- 101150111792 sda1 gene Proteins 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract description 16
- 230000005611 electricity Effects 0.000 abstract description 12
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
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- 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
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- 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
Abstract
The invention discloses a device for embedding a fingerprint module and a touch screen, which is connected with a central processing unit and comprises the fingerprint module, an LCM (liquid Crystal Module) and a connector; the LCM module comprises a touch screen cover plate, a circuit board and a metal bottom plate; the fingerprint module is arranged between the touch screen cover plate and the metal bottom plate, the connector is arranged on a circuit board of the LCM, signal lines of the fingerprint module and signal lines of the LCM are electrically connected with the connector, and the connector is electrically connected with the central processing unit; the signal of fingerprint module output, the signal of LCM module output carry out data interaction through connector and central processing unit. The fingerprint module is embedded into the touch screen and shares a connector with the LCM. Structurally, no gap is generated, the problem that static electricity causes the fingerprint module to lose efficacy is solved, an independent connector of the existing fingerprint module is omitted, and the space inside the mobile phone and the space of a circuit board are saved. Thereby the problems of static electricity, poor assembly and occupied space of the interface are solved.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a fingerprint module and touch screen embedded device.
Background
The smart phone is an important place in the work and life of the majority of users as an electronic consumer product. Since the advent of smart phones with fingerprint identification functions, fingerprint identification has gradually become a wind vane for force manufacturers and new flag ships. The application of fingerprint identification to smart phones has not been popularized, and front or rear fingerprint identification is gradually becoming a necessary feature for high-end mobile phone products.
At present, a plurality of mobile phones supporting fingerprint identification are available in the market, wherein iPhone5s/6/6 Plus/7 is the most excellent representative experience of the front fingerprint identification mobile phone. In android, OPPO, VIVO, huashi, millet and other manufacturers have successively introduced new front fingerprint recognition machines. The leading fingerprint identification scheme on the market at present is as an independent module with the fingerprint module to be connected to central processing unit through corresponding interface on the hardware, and the hole site of fingerprint module is reserved at touch-sensitive screen bottom central zone structurally, accomplishes the positive touch-sensitive screen bottom central zone of cell-phone through the structure nestification with fingerprint identification, the operation of being convenient for.
However, this structural nesting solution has the following disadvantages:
1. the fingerprint is that the user often uses, produces static very easily, and structural fingerprint module and touch-sensitive screen edge can leave the gap, and static gets into inside through the gap very easily, leads to fingerprint module inefficacy or produces other problems.
2. Because the fingerprint module and the touch screen are two independent modules, the problems of poor assembly, deviation and the like often occur in the assembly production of the mobile phone;
3. the fingerprint module is connected with central processing unit through independent interface as independent module, and the LCD display module group also needs independent interface connection central processing unit, and the peripheral circuit of fingerprint module and interface need occupy just originally very limited cell-phone inner space and PCB space.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a device for embedding a fingerprint module and a touch screen, so as to solve the problems of static electricity and occupied space of an interface caused by the mutually independent arrangement of the existing fingerprint module and the touch screen.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for embedding a fingerprint module and a touch screen is connected with a central processing unit and comprises the fingerprint module, an LCM module and a connector; the LCM comprises a touch screen cover plate, a circuit board and a metal bottom plate; the fingerprint module is arranged between the touch screen cover plate and the metal bottom plate, the connector is arranged on a circuit board of the LCM, signal lines of the fingerprint module and signal lines of the LCM are electrically connected with the connector, and the connector is electrically connected with the central processing unit; the signal of fingerprint module output, the signal of LCM module output carry out data interaction through connector and central processing unit.
In the fingerprint module and the device embedded in the touch screen, the fingerprint module comprises a fingerprint sensor, a fingerprint chip and a fingerprint module bracket; fingerprint sensor gathers the change of the regional electric capacity of fingerprint identification of touch-sensitive screen apron and transmits for fingerprint chip, and fingerprint chip converts the change of electric capacity into corresponding fingerprint image, carries out fingerprint image identification through the connector transmission to central processing unit, and fingerprint module support is used for fixing the circuit board between touch-sensitive screen apron and metal soleplate.
In the device embedded with the fingerprint module and the touch screen, the top surface of the fingerprint module bracket is fixedly abutted with the inner side surface of the touch screen cover plate, the bottom surface of the fingerprint module bracket is fixedly abutted with the inner side surface of the metal bottom plate, and the circuit board is fixed on the step surface of the fingerprint module bracket; the fingerprint sensor is arranged on one side of the circuit board and clings to the lower part of the touch screen cover plate, and the fingerprint chip is arranged on the other side of the circuit board.
In the device embedded in the fingerprint module and the touch screen, the connector comprises an interface, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor and a third resistor; one end of the first capacitor is connected with the 16 th pin of the interface, one end of the second capacitor is connected with the 13 th pin of the interface, one end of the third capacitor is connected with the 14 th pin of the interface, and one end of the fourth capacitor is connected with the 15 th pin of the interface; the other end of the first capacitor, the other end of the second capacitor, the other end of the third capacitor and the other end of the fourth capacitor are mutually connected and grounded; the 13 th pin of the interface is connected with a 1.8V power supply, the 14 th pin of the interface is connected with a 2.8V power supply, the 15 th pin of the interface is connected with a TP power supply, and the 16 th pin of the interface is connected with an AVDD power supply;
one end of the first resistor is connected with a pin 5 of the interface, the other end of the first resistor is connected with a synchronous detection pin of the LCM, one end of the second resistor is connected with a pin 6 of the interface, the other end of the second resistor is connected with a screen reset pin of the LCM, one end of the third resistor is connected with a pin 7 of the interface, and the other end of the third resistor is connected with an ID pin of the LCM;
the first backlight pin, the bias power supply positive pin, the second backlight pin, the bias power supply negative pin, the fourth data1 pin, the fourth data2 pin, the third data1 pin, the third data2 pin, the second data1 pin, the second data2 pin, the first data1 pin, the first data2 pin, the clock 1 pin and the clock 2 pin of the LCM are connected with the 1 st pin, the 2 nd pin, the 3 rd pin, the 4 th pin, the 27 th pin, the 28 th pin, the 30 th pin, the 31 th pin, the 33 th pin, the 34 th pin, the 36 th pin, the 37 th pin, the 39 th pin and the 40 th pin of the interface in a one-to-one manner;
the MOSI input pin, the CLK clock pin, the MISO output pin and the SS synchronous pin of the fingerprint module are connected with the 22 nd pin, the 23 rd pin, the 24 th pin and the 25 th pin of the interface in a one-to-one way; the 12 th pin, the 21 st pin, the 26 th pin, the 29 th pin, the 32 nd pin, the 35 th pin, the 38 th pin, the 41 st pin, the 42 th pin, the 43 th pin and the 44 th pin of the interface are all grounded;
all signals of the fingerprint module and the LCM are combined to the interface, a chip and a peripheral circuit of the fingerprint module are integrated to the LCM, and the HOME key function is realized by double-click.
In the fingerprint module and the device embedded in the touch screen, the type of the interface is AXE 540127D.
In the device embedded in the fingerprint module and the touch screen, the connector further comprises a first TVS tube, a second TVS tube, a third TVS tube, a fourth TVS tube and a fifth TVS tube; one end of the first TVS tube is connected with one end of the first capacitor and the 16 th pin of the interface, one end of the second TVS tube is connected with the 17 th pin of the interface, one end of the third TVS tube is connected with the 18 th pin of the interface, one end of the fourth TVS tube is connected with the 19 th pin of the interface, and one end of the fifth TVS tube is connected with the 20 th pin of the interface; the other end of the first TVS tube, the other end of the second TVS tube, the other end of the third TVS tube, the other end of the fourth TVS tube and the other end of the fifth TVS tube are connected with each other and grounded; the 17 th pin of the interface is connected with a SHUTDOWN reset signal, the 18 th pin of the interface is connected with an IRQ interrupt signal, the 19 th pin of the interface is connected with a fingerprint ID detection signal, and the 20 th pin of the interface is connected with a master control HOME key control signal.
In the device embedded in the fingerprint module and the touch screen, the connector further comprises a sixth TVS tube, a seventh TVS tube, an eighth TVS tube, a ninth TVS tube and a tenth TVS tube; one end of the sixth TVS tube is connected with the 8 th pin of the interface, one end of the seventh TVS tube is connected with the 9 th pin of the interface, one end of the eighth TVS tube is connected with the 10 th pin of the interface, one end of the ninth TVS tube is connected with the 11 th pin of the interface, and one end of the tenth TVS tube is connected with the 15 th pin of the interface; the other end of the sixth TVS tube, the other end of the seventh TVS tube, the other end of the eighth TVS tube, the other end of the ninth TVS tube and the other end of the tenth TVS tube are connected with each other and grounded; the SDA1 signal is connected to the 8 th foot of the interface, the SCL1 signal is connected to the 9 th foot of the interface, the reset signal of the touch screen is connected to the 10 th foot of the interface, and the CTP interrupt signal is connected to the 11 th foot of the interface.
Compared with the prior art, the fingerprint module and the device embedded in the touch screen provided by the invention comprise a fingerprint module, an LCM module and a connector; the LCM comprises a touch screen cover plate, a circuit board and a metal bottom plate; the fingerprint module is arranged between the touch screen cover plate and the metal bottom plate, the connector is arranged on a circuit board of the LCM, signal lines of the fingerprint module and signal lines of the LCM are electrically connected with the connector, and the connector is electrically connected with the central processing unit; the signal output by the fingerprint module and the signal output by the LCM carry out data interaction with the central processing unit through the connector; through with fingerprint module embedded touch-sensitive screen in, can not produce the gap from structural seeing, just can not make static pass through inside the gap gets into LCM module, solved static and made the problem that fingerprint module became invalid. Meanwhile, the fingerprint module, the LCM and the central processing unit are connected through a connector, so that the connector which is independent of the fingerprint module in the prior art is omitted, and the space inside the mobile phone and the space of a circuit board (namely a PCB) are saved. Therefore, the device solves the problems of static electricity, poor assembly and occupied space of the interface.
Drawings
Fig. 1 is a schematic diagram of a fingerprint module and a device embedded in a touch screen according to the present invention.
FIG. 2 is a cross-sectional view of a fingerprint module and an LCM module of the device embedded in the fingerprint module and the touch screen.
Fig. 3 is a circuit diagram of a connector in the fingerprint module and the device embedded in the touch screen according to the present invention.
Detailed Description
The invention provides a device for embedding a fingerprint module and a touch screen, wherein the fingerprint module is embedded in the touch screen, no gap is generated in the structural view, a unified interface is adopted for connecting hardware to be connected with a central processing unit, a chip and a peripheral circuit of the fingerprint module are integrated on an LCM (liquid crystal display module), an independent connector of the fingerprint module is omitted, the space inside a mobile phone and a PCB (printed circuit board) is saved, and the bad problems caused by static electricity, assembly and the like are avoided. In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 2, the fingerprint module and touch screen embedded device provided by the present invention includes a fingerprint module 10, an LCM module 20 and a connector 30; the LCM module 20 comprises a touch screen cover plate 210, a circuit board 220 and a metal bottom plate 230 which are arranged from top to bottom in sequence; the fingerprint module 10 is disposed between the glass touch panel cover 210 and the metal base plate 230, the connector 30 is disposed on the circuit board 220 of the LCM module 20, all signal lines of the fingerprint module 10 and all signal lines of the LCM module 20 are electrically connected to the connector 30, and the connector 30 is electrically connected to the central processing unit (i.e., CPU). All signals output by the fingerprint module 10 and all signals output by the LCM module 20 interact with the cpu through the connector 30.
The fingerprint module 10 is arranged between the touch screen cover plate 210 and the metal bottom plate 230, which is equivalent to embedding the fingerprint module 10 into the touch screen, shares one connector 30 with the LCM module 20, and performs signal data interaction with the CPU through the connector 30 to realize corresponding control; structurally, no gap is generated, so that static electricity can not enter the LCM 20 through the gap, and the problem that the fingerprint module fails due to the static electricity is solved. Meanwhile, the fingerprint module 10, the LCM 20 and the CPU are connected by a connector 30, so that an independent connector of the fingerprint module in the prior art is omitted, and the space inside the mobile phone and the space of a circuit board (namely a PCB) are saved. Therefore, the device solves the problems of static electricity, poor assembly and occupied space of the interface.
In this embodiment, the fingerprint module 10 includes a fingerprint sensor 110, a fingerprint chip 120 and a fingerprint module holder 130. Fingerprint module support 130 is used for fixing circuit board 220 between touch-sensitive screen apron 210 and metal bottom plate 230, as shown in fig. 2, fingerprint module support 130 is cascaded support, the top surface of fingerprint module support 130 is fixed with the medial surface butt of touch-sensitive screen apron, and the bottom surface of fingerprint module support is fixed with the medial surface butt of metal bottom plate, and circuit board 220 accessible is pasted or welded mode is fixed on the step face of cascaded support. The fingerprint sensor 110 is disposed on one side of the circuit board 220 and closely attached to the lower side of the touch screen cover 210, and the fingerprint chip 120 is disposed on the other side of the circuit board 220 and opposite to the metal base 230.
In an implementation, a fingerprint recognition area may be disposed on the touch screen cover 210 to indicate the location of the fingerprint sensor 110. When the finger touches the fingerprint identification area, the finger becomes the other side of the capacitor, because the finger plane is uneven, the actual distance between the convex part and the concave part contacting the touch screen cover plate 210 is different, the formed capacitance is also different, the fingerprint sensor 110 collects the capacitance change and transmits the capacitance change to the fingerprint chip 120, and the fingerprint chip 120 forms the capacitance change into a corresponding fingerprint image through an internal algorithm and transmits the fingerprint image to the central processing unit through the connector 30. And the central processing unit identifies the unique identity information according to the fingerprint image.
Referring to fig. 3, the input and output signals of the fingerprint module 10 include: fingerprint power supply voltage (divided into 3.3V AVDD power FP _ AVDD and 1.8V input/output port voltage VIO18_ PMU); SPI network signals (divided into SS synchronization signal FP _ SPI _ SS, CLK clock signal FP _ SPI _ SCLK, MISO output signal FP _ SPI _ MISO, and MOSI input signal FP _ SPI _ MOSI); fingerprint ID detection signal FP _ ID; an IRQ interrupt signal FP _ IRQ; a SHUTDOWN reset signal FP _ SHUTDOWN and a master HOME key control signal HOME. The SPI network signal is a communication signal group between the CPU and the fingerprint chip. The MOSI input signal is the CPU input signal to the fingerprint chip, containing the data input of the command and address sequence. The MISO output signal is the data output of the fingerprint chip to the CPU. The CLK clock signal FP _ SPI _ SCLK and the SS synchronizing signal FP _ SPI _ SS are the clock and synchronizing signals given to the fingerprint module by the CPU. The fingerprint power supply voltage (1.8V and 3.3V) is the external power supply provided for the fingerprint module.
All signals of the LCM module 20 include 5 MIPI lines (divided into LCM _ CLK _ N/P, LCM _ DATA0_ N/P, LCM _ DATA1_ N/P, LCM _ DATA2_ N/P, LCM _ DATA3_ N/P); 1.8V \2.8V power supply (VIO 18_ PMU, VIO28_ PMU); an ID signal (GPIO _ LCD _ ID); a RST reset signal (including a reset signal LCM _ RST of the screen and a reset signal GPIO62_ CTP _ RST of the touch screen); backlight power supplies (LEDA, LEDK) for LCDs (liquid crystal displays); CTP interrupt signal (EINT 10_ CTP); a bias power supply (AVDD +, AVDD-); a 2.8V TP power supply (VGP 1_2V 8); I2C lines (SDA 1, SCL 1) and an LCD synchronization detection signal DSI _ TE.
The connector 30 comprises an interface J1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1, a second resistor R2 and a third resistor R3; one end of the first capacitor C1 is connected with the 16 th pin of the interface J1, one end of the second capacitor C2 is connected with the 13 th pin of the interface J1, one end of the third capacitor C3 is connected with the 14 th pin of the interface J1, and one end of the fourth capacitor C4 is connected with the 15 th pin of the interface J1; the other end of the first capacitor C1, the other end of the second capacitor C2, the other end of the third capacitor C3 and the other end of the fourth capacitor C4 are connected with each other and grounded; one end of the first resistor R1 is connected to the 5 th pin of the interface J1, the other end of the first resistor R1 is connected to the synchronization detection pin (DSI _ TE) of the LCM module 20, one end of the second resistor R2 is connected to the 6 th pin of the interface J1, the other end of the second resistor R2 is connected to the screen reset pin (LCM _ RST) of the LCM module 20, one end of the third resistor R3 is connected to the 7 th pin of the interface J1, and the other end of the third resistor R3 is connected to the ID pin (GPIO _ LCD _ ID) of the LCM module 20.
The first backlight pin (LEDA), the bias power supply positive pin (AVDD +), the second backlight pin (LEDK), the bias power supply negative pin (AVDD-), the fourth DATA1 pin (LCM _ DATA3_ P), the fourth DATA2 pin (LCM _ DATA3_ N), the third DATA1 pin (LCM _ DATA2_ P), the third DATA2 pin (LCM _ DATA2_ N), the second DATA1 pin (LCM _ DATA1_ P), the second DATA2 pin (LCM _ DATA1_ N), the first DATA1 pin (LCM _ DATA0_ P), the first DATA2 pin (LCM _ DATA0_ N), the clock 1 pin (LCM _ CLK _ P), the clock 2 pin (LCM _ CLK _ N), and the 1, 2, 3, 4, 27, 28, 30, 33, 39 th pins of the interface J1, The 40 th pin is connected one to one.
The MOSI input pin (FP _ SPI _ MOSI), CLK clock pin (FP _ SPI _ SCLK), MISO output pin (FP _ SPI _ MISO), and SS synchronization pin (FP _ SPI _ SS) of the fingerprint module 10 are connected to the 22 nd, 23 rd, 24 th, and 25 th pins of the interface J1 in a one-to-one manner.
The MOSI input pin is used for inputting data containing command and address sequences, and the MOSI input signal FP _ SPI _ MOSI is a serial input signal. The MISO output pin is used for outputting data from the equipment, and the MISO output signal FP _ SPI _ MISO is a serial output signal. The CLK clock pin is used to provide a clock to the device and to control the flow of data to or from the device, and the CLK clock signal FP _ SPI _ SCLK is a serial clock. The SS synchronization pin is used to select a device. When the SS synchronization pin is released, the device will be cancelled and at this time the MOSI input pin of the device does not receive any data. The transition from high to low of the voltage on the SS sync pin enables the start operation and the transition from low to high is the end operation.
The interface J1 is AXE540127D, all signals of the fingerprint film group and the LCM module are combined to one interface J1, the fingerprint film group and the LCM module are connected to a CPU through an interface J1 as a whole, and the control is carried out by the CPU in a unified mode. Structurally, the fingerprint film group and the LCM are not taken as independent modules to be connected and assembled with the CPU through independent interfaces, but the fingerprint module is taken as one part of the LCM and is embedded into the LCM. After the fingerprint module is embedded, the HMOE key function does not exist, so that the HOME key function can be realized by double-click of fingerprints and the like.
In a further embodiment, the connector further comprises a first TVS tube V1, a second TVS tube V2, a third TVS tube V3, a fourth TVS tube V4, and a fifth TVS tube V5; one end of the first TVS tube V1 is connected to one end of the first capacitor C1 and the 16 th pin of the interface J1, one end of the second TVS tube V2 is connected to the 17 th pin of the interface J1, one end of the third TVS tube V3 is connected to the 18 th pin of the interface J1, one end of the fourth TVS tube V4 is connected to the 19 th pin of the interface J1, and one end of the fifth TVS tube V5 is connected to the 20 th pin of the interface J1; the other end of the first TVS tube V1, the other end of the second TVS tube V2, the other end of the third TVS tube V3, the other end of the fourth TVS tube V4, and the other end of the fifth TVS tube V5 are connected to each other and grounded.
The first TVS tube V1, the second TVS tube V2, the third TVS tube V3, the fourth TVS tube V4 and the fifth TVS tube V5 are all bidirectional TVS tubes. The 5 TVS tubes are respectively connected to the ground from pins corresponding to an AVDD power supply, a SHUTDOWN reset signal, an IRQ interrupt signal, a fingerprint ID detection signal and a master control HOME key (master page key) control signal of the fingerprint module, play a role in preventing static electricity and protect a fingerprint chip from being damaged by static electricity.
In a further embodiment, the connector further comprises a sixth TVS tube V6, a seventh TVS tube V7, an eighth TVS tube V8, a ninth TVS tube V9, and a tenth TVS tube V10; one end of the sixth TVS tube V6 is connected with the 8 th pin of the joint J1, one end of the seventh TVS tube V7 is connected with the 9 th pin of the joint J1, one end of the eighth TVS tube V8 is connected with the 10 th pin of the joint J1, one end of the ninth TVS tube V9 is connected with the 11 th pin of the joint J1, and one end of the tenth TVS tube V10 is connected with the 15 th pin of the joint J1; the other end of the sixth TVS tube V6, the other end of the seventh TVS tube V7, the other end of the eighth TVS tube V8, the other end of the ninth TVS tube V9, and the other end of the tenth TVS tube V10 are connected to each other and grounded.
The sixth TVS tube V6, the seventh TVS tube V7, the eighth TVS tube V8, the ninth TVS tube V9 and the tenth TVS tube V10 are all bidirectional TVS tubes (different from the packages of the first TVS tube V1 to the fifth TVS tube V5). The TVS tube group is respectively connected with the I2C signal of the TP (touch screen), the reset signal of the touch screen, the CTP interrupt signal and the corresponding pin of the 2.8V power supply in parallel and is used for preventing the TP from being disturbed or damaged by static electricity.
It should be understood that the signal processing and interaction between the CPU and the fingerprint module 10 and the LCM module 20 are prior art and will not be described in detail herein. The fingerprint module 10 and the LCM module 20 further have other module structures, such as a power module and a light guide plate, and only the structures related to this embodiment are described herein, and the description of the other structures is omitted.
During the concrete implementation, the fingerprint module can be embedded to any position on the touch-sensitive screen, for example certain fixed position of edge top under the screen to make things convenient for user's fingerprint identification and do not influence touch operation and be the owner.
In summary, according to the device for embedding the fingerprint module and the touch screen, the fingerprint module is embedded in the touch screen, no gap is generated in the structure, the connection on hardware adopts the uniform interface to be connected with the central processing unit, the chip and the peripheral circuit of the fingerprint module are integrated on the LCM, the connector independent of the fingerprint module is omitted, the space inside the mobile phone and the space of a PCB (printed circuit board) are saved, and the problems of static electricity, poor assembly and space occupation of the interface are avoided.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (5)
1. A fingerprint module and a device embedded in a touch screen are connected with a central processing unit and are characterized by comprising a fingerprint module, an LCM module and a connector; the LCM comprises a touch screen cover plate, a circuit board and a metal bottom plate; the fingerprint module is arranged between the touch screen cover plate and the metal bottom plate, the connector is arranged on a circuit board of the LCM, signal lines of the fingerprint module and signal lines of the LCM are electrically connected with the connector, and the connector is electrically connected with the central processing unit; the signal output by the fingerprint module and the signal output by the LCM carry out data interaction with the central processing unit through the connector;
the connector comprises an interface, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor and a third resistor; the type of the interface is AXE540127D, one end of the first capacitor is connected with the 16 th pin of the interface, one end of the second capacitor is connected with the 13 th pin of the interface, one end of the third capacitor is connected with the 14 th pin of the interface, and one end of the fourth capacitor is connected with the 15 th pin of the interface; the other end of the first capacitor, the other end of the second capacitor, the other end of the third capacitor and the other end of the fourth capacitor are mutually connected and grounded; the 13 th pin of the interface is connected with a 1.8V power supply, the 14 th pin of the interface is connected with a 2.8V power supply, the 15 th pin of the interface is connected with a TP power supply, and the 16 th pin of the interface is connected with an AVDD power supply;
one end of the first resistor is connected with a pin 5 of the interface, the other end of the first resistor is connected with a synchronous detection pin of the LCM, one end of the second resistor is connected with a pin 6 of the interface, the other end of the second resistor is connected with a screen reset pin of the LCM, one end of the third resistor is connected with a pin 7 of the interface, and the other end of the third resistor is connected with an ID pin of the LCM;
the first backlight pin, the bias power supply positive pin, the second backlight pin, the bias power supply negative pin, the fourth data1 pin, the fourth data2 pin, the third data1 pin, the third data2 pin, the second data1 pin, the second data2 pin, the first data1 pin, the first data2 pin, the clock 1 pin and the clock 2 pin of the LCM are connected with the 1 st pin, the 2 nd pin, the 3 rd pin, the 4 th pin, the 27 th pin, the 28 th pin, the 30 th pin, the 31 th pin, the 33 th pin, the 34 th pin, the 36 th pin, the 37 th pin, the 39 th pin and the 40 th pin of the interface in a one-to-one manner;
the MOSI input pin, the CLK clock pin, the MISO output pin and the SS synchronous pin of the fingerprint module are connected with the 22 nd pin, the 23 rd pin, the 24 th pin and the 25 th pin of the interface in a one-to-one way; the 12 th pin, the 21 st pin, the 26 th pin, the 29 th pin, the 32 nd pin, the 35 th pin, the 38 th pin, the 41 st pin, the 42 th pin, the 43 th pin and the 44 th pin of the interface are all grounded;
all signals of the fingerprint module and the LCM are combined to the interface, a chip and a peripheral circuit of the fingerprint module are integrated to the LCM, and the HOME key function is realized by double-click.
2. The embedded device of fingerprint module and touch-sensitive screen of claim 1, characterized in that, the fingerprint module includes fingerprint sensor, fingerprint chip and fingerprint module support; fingerprint sensor gathers the change of the regional electric capacity of fingerprint identification of touch-sensitive screen apron and transmits for fingerprint chip, and fingerprint chip converts the change of electric capacity into corresponding fingerprint image, carries out fingerprint image identification through the connector transmission to central processing unit, and fingerprint module support is used for fixing the circuit board between touch-sensitive screen apron and metal soleplate.
3. The device for embedding the fingerprint module into the touch screen according to claim 2, wherein the top surface of the fingerprint module support is fixedly abutted with the inner side surface of the touch screen cover plate, the bottom surface of the fingerprint module support is fixedly abutted with the inner side surface of the metal bottom plate, and the circuit board is fixed on the step surface of the fingerprint module support; the fingerprint sensor is arranged on one side of the circuit board and clings to the lower part of the touch screen cover plate, and the fingerprint chip is arranged on the other side of the circuit board.
4. The fingerprint module and touch screen embedded device according to claim 3, wherein the connector further comprises a first TVS tube, a second TVS tube, a third TVS tube, a fourth TVS tube and a fifth TVS tube; one end of the first TVS tube is connected with one end of the first capacitor and the 16 th pin of the interface, one end of the second TVS tube is connected with the 17 th pin of the interface, one end of the third TVS tube is connected with the 18 th pin of the interface, one end of the fourth TVS tube is connected with the 19 th pin of the interface, and one end of the fifth TVS tube is connected with the 20 th pin of the interface; the other end of the first TVS tube, the other end of the second TVS tube, the other end of the third TVS tube, the other end of the fourth TVS tube and the other end of the fifth TVS tube are connected with each other and grounded; the 17 th pin of the interface is connected with a SHUTDOWN reset signal, the 18 th pin of the interface is connected with an IRQ interrupt signal, the 19 th pin of the interface is connected with a fingerprint ID detection signal, and the 20 th pin of the interface is connected with a master control HOME key control signal.
5. The fingerprint module and touch screen embedded device according to claim 3 or 4, wherein the connector further comprises a sixth TVS tube, a seventh TVS tube, an eighth TVS tube, a ninth TVS tube and a tenth TVS tube; one end of the sixth TVS tube is connected with the 8 th pin of the interface, one end of the seventh TVS tube is connected with the 9 th pin of the interface, one end of the eighth TVS tube is connected with the 10 th pin of the interface, one end of the ninth TVS tube is connected with the 11 th pin of the interface, and one end of the tenth TVS tube is connected with the 15 th pin of the interface; the other end of the sixth TVS tube, the other end of the seventh TVS tube, the other end of the eighth TVS tube, the other end of the ninth TVS tube and the other end of the tenth TVS tube are connected with each other and grounded; the SDA1 signal is connected to the 8 th foot of the interface, the SCL1 signal is connected to the 9 th foot of the interface, the reset signal of the touch screen is connected to the 10 th foot of the interface, and the CTP interrupt signal is connected to the 11 th foot of the interface.
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| CN107577278B (en) * | 2017-09-14 | 2020-02-04 | 维沃移动通信有限公司 | Display screen assembly and mobile terminal |
| US11048907B2 (en) * | 2017-09-22 | 2021-06-29 | Pix Art Imaging Inc. | Object tracking method and object tracking system |
| CN110998480B (en) * | 2017-10-27 | 2021-12-28 | 华为技术有限公司 | Structural assembly, electronic device and fingerprint module assembly method |
| CN111625146B (en) * | 2020-05-27 | 2023-08-04 | 北京无线电测量研究所 | Electronic product with double touch screens |
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| CN101901092A (en) * | 2008-12-24 | 2010-12-01 | 耀光联有限公司 | Control panel for controlling information processing system and information processing system |
| CN104850292A (en) * | 2015-06-01 | 2015-08-19 | 京东方科技集团股份有限公司 | Embedded touch screen, driving method of embedded touch screen and display device |
| CN106127195A (en) * | 2016-08-30 | 2016-11-16 | 广东欧珀移动通信有限公司 | Fingerprint module, fingerprint module manufacture method and mobile terminal |
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| CN101901092A (en) * | 2008-12-24 | 2010-12-01 | 耀光联有限公司 | Control panel for controlling information processing system and information processing system |
| CN104850292A (en) * | 2015-06-01 | 2015-08-19 | 京东方科技集团股份有限公司 | Embedded touch screen, driving method of embedded touch screen and display device |
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