Anti-interference testing device for under-screen NFC (Near Field Communication) touch screen

Abstract

An anti-interference testing device for an under-screen NFC touch screen comprises a base, an NFC mounting seat, a backlight assembly and a top seat which are sequentially arranged from bottom to top. The NFC mounting seat is detachably mounted on the base, and an NFC antenna for testing is placed between the NFC mounting seat and the backlight assembly; the backlight assembly is detachably installed on the base and used for providing a light source. The top seat is hinged to the base, liquid crystal glass for testing and the TP assembly are placed between the backlight assembly and the top seat, the TP assembly is arranged close to one side of the top seat, an open groove is formed in the top seat in advance so that the TP assembly can be exposed, and the TP assembly is used for being connected with a testing box and connected with a computer for testing. The NFC antenna is integrated to the bottom of the testing device, emission is carried out at the whole bottom of the touch screen, the interference tolerance degree of touch of the liquid crystal glass and the TP assembly to the NFC emission model is evaluated, the liquid crystal glass and the TP assembly do not need to be assembled, a clamp does not need to be customized for each set of product, the evaluation time is short, and therefore the applicability of the testing device is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of NFC communication, and particularly relates to a testing device for anti-interference of an under-screen NFC touch screen. BACKGROUND

[0002] With the popularity of smart phones and various smart devices and the expansion of the mobile payment field, NFC technology is used by more and more devices due to its fast and safe near-field wireless communication characteristics. Specifically, the devices on the market all have an independent NFC coil area arranged on the back of the device. On this basis, with the increasing demand for the front screen of industrial and logistics mobile phones and tablets to swipe NFC cards and see the results, the transmission direction of the designed NFC antenna needs to be moved from the back of the device to the screen below. Under this condition, the NFC antenna will interfere with the display of the liquid crystal glass and the touch function of the TP when transmitting, resulting in flickering of the liquid crystal glass and poor touch and jumping of the TP.

[0003] In a computer or mobile phone display screen, the liquid crystal glass cooperates with the corresponding display module to display images, and the touch layer is used to detect the touch or gestures of a user, and the whole is usually connected by a closed frame or an active screen to form a touch screen of an electronic device. When performing anti-interference testing according to the existing scheme, the backlight module needs to be assembled first, the liquid crystal glass needs to be bound to the display IC and the FPC connector, and then connected to the mainboard of the device. Then, the device is started, and whether the screen flickers, shakes and the TP jumps when the NFC is transmitted is observed.

[0004] At present, the radio frequency antenna sensitivity of liquid crystal glass and TP of different brands is inconsistent, and there are also differences between liquid crystal glass and TP of different batches of the same brand. According to the above scheme, the liquid crystal glass and TP assembly need to be assembled, and a jig needs to be customized for each set of products and be sampled to evaluate, which is time-consuming and laborious. INVENTION CONTENTS

[0005] The application provides a testing device for anti-interference of an under-screen NFC touch screen, so as to improve the applicability of the testing device.

[0006] According to an aspect of the application, a testing device for anti-interference of an under-screen NFC touch screen is provided in an embodiment, which comprises a base, an NFC mounting seat, a backlight assembly and a top seat arranged in sequence from bottom to top.

[0007] The NFC mounting seat is detachably mounted on the base, and an NFC antenna for generating an NFC (near field communication) signal is arranged between the NFC mounting seat and the backlight assembly.

[0008] The backlight assembly is detachably mounted on the base and used for providing light source; the top base is hinged to the base, and the backlight assembly and the top base are used for placing test liquid crystal glass and TP assembly, the TP assembly is arranged close to one side of the top base, and a slot is pre-opened on the top base to expose the TP assembly, and the TP assembly is used for connecting test box and turning on computer for testing.

[0009] In another embodiment, the lower surface of the NFC mounting seat is provided with a plurality of limiting columns, and the upper surface of the base is provided with mounting holes for inserting the limiting columns.

[0010] In another embodiment, the mounting holes are arranged on the upper surface of the base and are uniformly distributed to adjust the mounting position of the NFC mounting seat on the upper surface of the base.

[0011] In another embodiment, the mounting holes are arranged within the backlight coverage range of the backlight assembly to isolate the NFC antenna and the liquid crystal glass and the TP assembly.

[0012] In another embodiment, the backlight assembly includes a backlight mounting seat and a plurality of stacked backlight panels, the backlight mounting seat forms a frame of the backlight panels, and the backlight panels are used for providing light source and illuminating the liquid crystal glass.

[0013] In another embodiment, the upper surface of the base is provided with a plurality of positioning columns, and the backlight mounting seat is provided with a plurality of positioning sleeve holes for inserting the positioning columns.

[0014] In another embodiment, the backlight mounting seat is arranged as a square frame, the positioning columns are arranged as four, and the positioning sleeve holes are arranged at the corners of the backlight mounting seat.

[0015] In another embodiment, the upper surface of the backlight mounting seat is recessed to embed the liquid crystal glass, and the upper surface of the NFC mounting seat is recessed to embed the NFC antenna.

[0016] In another embodiment, the lower end of the top base is provided with a connecting piece, and the connecting piece is used for supplying power to the liquid crystal glass.

[0017] In another embodiment, the connecting piece includes a plurality of elastic pins, the upper end of the elastic pin is mounted on the top base and is used for power supply, and the lower end of the elastic pin is used for abutting against the liquid crystal glass to make the liquid crystal glass display power supply.

[0018] The anti-interference test device for the under-screen NFC touch screen according to the above embodiment integrates the NFC antenna into the bottom of the test device, and can emit on the entire bottom of the test screen, so as to evaluate the interference tolerance of the liquid crystal glass and the TP touch on the NFC emission type, so as to realize the evaluation of the signal transmission intensity of the backlight assembly, the liquid crystal glass and the TP assembly when the NFC emits, and the selection of the corresponding test object is provided by the test. The scheme does not need to assemble the liquid crystal glass and the TP assembly, does not need to customize the clamp for each product, only needs to assemble the backlight film into the backlight assembly, and the liquid crystal glass is directly powered on and brightened, the device has high universality, the liquid crystal glass, the backlight material selection and the transmission intensity of the TP and the NFC signal are evaluated at one time, the operation strength is reduced, and the error in the separate evaluation is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the anti-interference test device for the under-screen NFC touch screen.

[0020] Figure 2 It is a schematic diagram of the structure after the top seat is opened in an embodiment.

[0021] Figure 3 It is an exploded schematic diagram of the structure after the top seat is opened in an embodiment.

[0022] Figure 4 It is a schematic diagram of the overall structure of the anti-interference test device for the under-screen NFC touch screen.

[0023] Figure 5 It is an exploded schematic diagram of the overall structure of the anti-interference test device for the under-screen NFC touch screen.

[0024] The figure mark: 1, the base; 11, the mounting hole; 12, the positioning column; 13, the hinged seat; 14, the hinged shaft; 2, the NFC mounting seat; 21, the limiting column; 3, the NFC antenna; 4, the backlight assembly; 41, the backlight mounting seat; 42, the backlight plate; 43, the positioning sleeve hole; 5, the liquid crystal glass; 6, the TP assembly; 7, the top seat; 71, the connecting piece. DETAILED DESCRIPTION

[0025] The application will be described in further detail below with specific reference being made to the drawings. Like elements are marked with the same reference numerals throughout the various figures. In the following description, numerous specific details are described to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that the 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 application. In the following description, numerous specific details are described to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that the 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 application.

[0026] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the steps involved in the operations of various embodiments can be sequentially adjusted or changed in a manner that can be easily understood by those skilled in the art. Therefore, the specification and drawings are only intended to clearly describe one embodiment, and do not mean that the composition and / or order is necessary.

[0027] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and have no technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0028] With the increasing demand for NFC card seen on the front screen of industrial and logistics mobile phones and tablets for the need of interaction, the transmission direction of the NFC antenna 3 needs to be moved from the back of the device to under the screen. In this case, the 3.5 MHz radio frequency signal of the NFC antenna 313 will interfere with the display of the liquid crystal glass 5 and the touch function of the TP, causing the liquid crystal glass 5 to flash and the TP to touch poorly, skip points, etc.

[0029] In a computer or mobile phone display screen, the liquid crystal glass 5 cooperates with the corresponding display module to display images, and the touch layer is used to detect user touch or gestures, and the whole is usually formed by a closed frame or an active screen connected to the touch screen of the electronic device. When the existing scheme is tested for anti-interference, the backlight module needs to be assembled first, the liquid crystal glass 5 is bound to the display IC and FPC connector, connected to the mainboard of the device, and then the device is started. Observe whether the screen flashes, shakes and whether the TP skips points when the NFC is transmitted.

[0030] Currently, the radio frequency antenna sensitivity of the liquid crystal glass 5 and the TP to the NFC antenna 3 of different brands is inconsistent, and there are also differences between the liquid crystal glass 5 and the TP of different batches of the same brand. The above scheme needs to assemble the liquid crystal glass 5 and the TP assembly 6, and customize a jig for each set of product and make a sample to evaluate. The evaluation cycle is long, time-consuming and laborious.

[0031] In order to ensure that the NFC signal transmits well from the screen at the same time, and at the same time, the liquid crystal glass 5 display does not allow the appearance of detailed screen flicker and other defects, the application provides a test device for anti-interference of under-screen NFC touch screen, without assembling the liquid crystal glass 5 and the TP assembly 6, without customizing a jig for each set of product, short evaluation time, thereby improving the applicability of the test device.

[0032] Please refer to Figure 1 , 2 and Figure 3 , in one embodiment, a test device for anti-interference of under-screen NFC touch screen is provided, comprising a base 1, an NFC mounting seat 2, a backlight assembly 4 and a top seat 7 arranged in sequence from bottom to top; the NFC mounting seat 2 is detachably mounted on the base 1, and a test NFC antenna 3 is placed between the NFC mounting seat 2 and the backlight assembly 4, and the NFC antenna 3 is used to generate an NFC (near field communication) signal; the backlight assembly 4 is detachably mounted on the base 1 and is used to provide a light source; the top seat 7 is hinged to the base 1, and the backlight assembly 4 and the top seat 7 are used to place a test liquid crystal glass 5 and a TP assembly 6, the TP assembly 6 is arranged close to one side of the top seat 7, and a slot is pre-opened on the top seat 7 to expose the TP assembly 6, and the TP assembly 6 is used to connect a test box and turn on a computer for testing.

[0033] In the anti-interference test of the present application scheme, the NFC antenna 3 is connected to the mainboard or the NFC generator, the TP assembly 6 is connected to the test box and turned on the computer, the liquid crystal glass 5 is powered on, the backlight assembly 4 is powered on to provide a light source, the emission distance of the NFC transmission is tested by using an NFC standard card, and the emission intensity is confirmed after confirming the distance. Whether the liquid crystal glass 5 has a screen flicker and a jitter under various color pictures is observed, and the TP function of the TP assembly 6 is verified by the computer.

[0034] According to the under-screen NFC touch screen anti-interference test device of the above embodiment, the NFC antenna 3 is integrated into the bottom of the test device, and can emit on the entire bottom of the test touch screen, which is used to evaluate the interference tolerance of the liquid crystal glass 5 and the TP touch to the NFC emission model, so as to realize the evaluation of the signal transmission intensity of the backlight assembly 4, the liquid crystal glass 5 and the TP assembly 6 when the NFC emits.

[0035] Further, please refer to Figure 2 and Figure 5The NFC mounting base 2 is concave on the upper surface, that is, a slot is provided with a concave groove for embedding the NFC antenna 3.

[0036] Further, in order to evaluate the difference in interference of the NFC antenna 3 on different areas of the liquid crystal glass 5 and the TP assembly 6, the NFC mounting base 2 is provided as an adjustable structure. Specifically, the lower surface of the NFC mounting base 2 is provided with a plurality of mounting holes 21, and the upper surface of the base 1 is provided with mounting holes 11 for inserting the limiting columns 21, so as to realize quick mounting and dismounting of the NFC mounting base 2 and the NFC antenna 3. In the technical scheme of the present application, four limiting columns 21 are provided, and the mounting holes 11 on the upper surface of the base 1 are provided with a plurality of mounting holes and are evenly distributed on the upper surface of the base 1, so as to adjust the mounting position of the NFC mounting base on the upper surface of the base. The mounting holes 11 are arranged within the backlight coverage range of the backlight assembly 4, so as to isolate the NFC antenna 3 from the liquid crystal glass 5 and the TP assembly 6. The limiting columns 21 can be adjustably inserted into the mounting holes 11 on the base 1, so that the NFC mounting base 2 can change the mounting position, thereby changing the emission position of the under-screen NFC, and improving the evaluation of the difference in interference of the NFC antenna 3 on different areas of the liquid crystal glass 5 and the TP assembly 6.

[0037] Further, please refer to Figure 2 , Figure 3 and Figure 4 The backlight assembly 4 includes a backlight mounting base 41 and a plurality of stacked backlight panels 42. The backlight mounting base 41 forms a frame of the backlight panels 42, and the backlight panels 42 are used to provide light sources and illuminate the liquid crystal glass 5. In electronic devices, the backlight assembly 4 is generally combined with a display module and arranged below the liquid crystal glass 5. The main function of the backlight panels 42 is to provide light sources, so that the screen can clearly display content even in an environment with insufficient light. Specifically, the backlight panels 42 are provided with LED lights connected to a power supply to provide light sources. The emitted light penetrates the liquid crystal glass 5 and illuminates the images or text on the screen. In this way, users can clearly see the content on the screen even in a relatively dark environment.

[0038] Please refer to Figure 2 and Figure 5 The backlight mounting base 41 is the outer frame of the backlight panels 42. After the backlight panels 42 are installed, the upper surface of the backlight mounting base 41 is concave, so as to embed and support the liquid crystal glass 5, limit and support the liquid crystal glass 5, and maintain the relative positions among the backlight panels 42, the liquid crystal glass 5 and the TP assembly 6. In the present application, the backlight film material can be selected by simulating the combination of the finished product in the single stage of the liquid crystal glass 5 or the backlight film material stage. The anti-interference performance of the liquid crystal glass 5 and the anti-interference performance of the TP assembly 6 can be evaluated, thereby providing important selection reference for research and development.

[0039] Please refer to Figure 2 andFigure 5 In order to realize the quick disassembly of the backlight assembly 4, a plurality of positioning columns 12 are arranged on the upper surface of the base 1, and the backlight mounting seat 41 is provided with a plurality of positioning sleeve holes 43 for the positioning columns 12 to be inserted into; specifically, the backlight mounting seat 41 is arranged as a square frame, four positioning columns 12 are arranged, and the positioning sleeve holes 43 are arranged at the corners of the backlight mounting seat 41.

[0040] In the existing electronic device, the TP assembly 6 includes a panel, a contact sensor, a flexible printed circuit (FPC), and a touch control chip (IC). The panel is the part directly touched by the user. The top seat 7 is slotted to expose the panel. The panel is usually a transparent glass or plastic panel used to protect the internal sensor and circuit. The contact sensor is used to detect the user's touch action and convert it into an electrical signal. The flexible printed circuit is used to connect the sensor and other electronic components, such as the touch control chip, to realize signal transmission and control. The touch control chip is responsible for processing the signals from the sensor, converting them into coordinate data that the device can understand, and transmitting them to the processor to perform corresponding operations. The various parts of the TP assembly 6 work together to enable the touch screen to accurately recognize the user's touch action and respond accordingly.

[0041] Further, please refer to Figure 2 and Figure 5 The base 1 is provided with a hinge seat 13, and the top seat 7 is hinged to the base 1 through a horizontal hinge shaft 14. After the corresponding backlight film material and liquid crystal glass 5 are installed, the top seat 7 is directly adjusted to rotate and press on the liquid crystal glass 5, and the TP assembly 6 is stacked above the liquid crystal glass 5. At the same time, in order to realize the power supply of the liquid crystal glass 5, the lower end of the top seat 7 is provided with a connecting piece 71 for supplying power to the liquid crystal glass 5. Specifically, the connecting piece 71 includes a plurality of elastic pins, the upper end of the elastic pin is installed on the top seat 7 and is used for power supply, and the lower end of the elastic pin is used for abutting on the liquid crystal glass 5. The elastic pin triggers the liquid crystal glass 5 to supply power and display.

[0042] In the use process of the scheme, the TP assembly 6 needs to be connected to the test box and connected to the computer for testing, the liquid crystal glass 5 is triggered to connect the power supply and display through the elastic pin. The corresponding LED lamp of the backlight assembly 4 is lit by power supply, the NFC antenna 3 is connected to the mainboard or the NFC generator, the emission distance of the NFC standard card is tested, the emission intensity is confirmed after confirming the distance, and whether the liquid crystal glass 5 has flicker and jitter under various color pictures is observed, so as to realize the anti-interference test of the liquid crystal glass 5. The TP assembly 6 is tested by connecting the computer to verify the TP function. The power supply connection of each part in the scheme, the test box, the computer detection software, etc. are all existing schemes, and will not be repeated here.

[0043] With the increase of the interaction demand of the industry and the logistics mobile phone tablet and the like to the front screen surface brush NFC card, and the various materials of the backlight assembly 4 have a certain blocking effect on the emission of NFC, and NFC has a certain interference on the display of the liquid crystal screen and the TP work when emitting. At present, the industry will make the backlight finished product combination liquid crystal glass 5 and TP for installation test, which will prolong the sample making period, slow down the research and development progress, and increase the research and development cost. The scheme of the present application does not need to assemble the liquid crystal display finished product, does not need to customize the clamp for each set of product, only needs to assemble the film material of the backlight into the backlight assembly 4, and the liquid crystal glass 5 is directly connected through the elastic needle to light up, and the universality is strong. The liquid crystal glass 5, the backlight material selection and the transmission intensity of the TP and the NFC signal are evaluated at one time, the operation intensity is reduced, and the error in the respective evaluation is avoided.

[0044] The above application of specific examples is used to describe the present application, which is only used to help understand the present application, and does not limit the present application. For the skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A testing device for anti-interference of under-display NFC touchscreens, characterized in that, It includes a base (1), an NFC mounting base (2), a backlight assembly (4), and a top mount (7) arranged from bottom to top; The NFC mounting base (2) is detachably mounted on the base (1), and a test NFC antenna (3) is placed between the NFC mounting base (2) and the backlight assembly (4), and the NFC antenna (3) is used to generate NFC (Near Field Communication) signals. The backlight assembly (4) is detachably mounted on the base (1) and is used to provide a light source; the top seat (7) is hinged to the base (1), and the backlight assembly (4) and the top seat (7) are used to place the test liquid crystal glass (5) and the TP assembly (6). The TP assembly (6) is located on the side close to the top seat (7), and the top seat (7) has a pre-cut slot to expose the TP assembly (6). The TP assembly (6) is used to connect the test box and connect to the computer for testing.

2. The testing device for anti-interference of under-display NFC touchscreens as described in claim 1, characterized in that, The NFC mounting base (2) has several limiting posts (21) on its lower surface, and the base (1) has mounting holes (11) on its upper surface for the limiting posts (21) to be inserted.

3. The testing device for anti-interference of under-display NFC touchscreens as described in claim 2, characterized in that, The mounting holes (11) are provided in a plurality of evenly distributed on the upper surface of the base (1) to adjust the mounting position of the NFC mounting base (2) on the upper surface of the base (1).

4. The testing device for anti-interference of under-display NFC touchscreens as described in claim 3, characterized in that, The mounting hole (11) is located within the backlight coverage area of ​​the backlight assembly (4) to isolate the NFC antenna (3) from the liquid crystal glass (5) and the TP assembly (6).

5. The testing device for anti-interference of under-display NFC touchscreens as described in claim 1, characterized in that, The backlight assembly (4) includes a backlight mounting base (41) and stacked multilayer backlight panels (42), the backlight mounting base (41) forming the frame of the backlight panel (42), and the backlight panel (42) providing a light source and illuminating the liquid crystal glass (5).

6. The testing device for anti-interference of under-display NFC touchscreens as described in claim 5, characterized in that, The upper surface of the base (1) is provided with a plurality of positioning posts (12), and the backlight mounting base (41) is provided with a plurality of positioning sleeve holes (43) for the positioning posts (12) to be inserted.

7. The testing device for anti-interference of under-display NFC touchscreens as described in claim 6, characterized in that, The backlight mounting base (41) is configured as a square frame, and four positioning posts (12) are provided. The positioning sleeve hole (43) is opened at the corner of the backlight mounting base (41).

8. The testing device for anti-interference of under-display NFC touchscreens as described in claim 5, characterized in that, The upper surface of the backlight mounting base (41) is recessed to embed the liquid crystal glass (5); the upper surface of the NFC mounting base (2) is recessed to embed the NFC antenna (3).

9. The testing device for anti-interference of under-display NFC touchscreens as described in claim 5, characterized in that, The lower end of the top seat (7) is provided with a connector (71), which is used to supply power to the liquid crystal glass (5).

10. The testing device for anti-interference of under-display NFC touchscreens as described in claim 9, characterized in that, The connector (71) includes multiple spring pins. The upper end of the spring pin is mounted on the top seat (7) and used for power supply. The lower end of the spring pin is used to abut against the liquid crystal glass (5) so that the liquid crystal glass (5) is powered for display.

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