Touch screen testing device and testing method

Abstract

The invention discloses a touch screen testing device and a testing method. The testing device comprises a bottom plate; the carrier plate is arranged on the bottom plate; the test assembly comprises a base and a flexible flat cable, the base is arranged on the bottom plate and located above the carrier plate, the flexible flat cable is arranged below the base, a plurality of array electrodes are arranged on the flexible flat cable, and the array electrodes are used for making contact with a to-be-tested piece; the adjusting assembly comprises a lower pressing block and a flexible part, the flexible part is arranged between the base and the flexible flat cable, the lower pressing block is arranged above the base, a plurality of mounting holes are formed in the lower pressing block, a suction nozzle is arranged in each mounting hole, the lower portion of each suction nozzle abuts against the flexible flat cable, and the suction nozzles are communicated with a vacuum generator. Through the vacuum generator, the suction nozzle can generate negative pressure on the flexible flat cable, so that the contact pressure of the array electrodes in the corresponding areas on the to-be-tested piece is adjusted, it is ensured that set balance force is achieved between the areas, it is ensured that the contact pressure of each area is consistent, and the testing precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, and in particular to a touch screen testing device and a testing method. Background Art

[0002] With the rapid development of electronic product technology and the increasing requirements for process efficiency and yield, the electronics industry has gradually begun to strengthen the development and optimization of product function testing equipment while improving the efficiency of electronic product processes. Among them, the capacitive screen is composed of multiple capacitive sensors, each of which corresponds to a pixel on the screen. When a finger or other conductor approaches or touches the screen, it causes the capacitance value of that point to change. The sensor detects the change in capacitance to determine the location and operation of the touch. There are several key test points when testing capacitive screens: Sensitivity: The minimum detectable touch pressure. Multi-touch accuracy: The accuracy of touching multiple points at the same time. Uniformity: The consistency of touch sensitivity in each area of ​​the screen, so the pressing force for each capacitor needs to be exactly the same.

[0003] To test high-density capacitive screens, two states need to be achieved. One is to press the product in a position with extremely good flatness, and the other is to be able to achieve the same pressing force at each position when pressing. Both of these points require very high processing accuracy and high processing costs. Currently, there is no good way to deal with such equipment, and adjustments are all made under manual intervention. Summary of the Invention

[0004] The present invention provides a touch screen testing device, aiming to solve at least one of the technical problems existing in the prior art.

[0005] The technical solution of the first aspect of the present invention relates to a touch screen testing device, which includes:

[0006] base plate;

[0007] A carrier plate, arranged on the bottom plate;

[0008] The test assembly includes a base and a flexible flat cable, wherein the base is disposed on the bottom plate and above the carrier plate, the flexible flat cable is disposed below the base, and a plurality of array electrodes are disposed on the flexible flat cable, the array electrodes being used to contact the device under test;

[0009] The adjustment component includes a lower pressure block and a flexible member. The flexible member is arranged between the base and the flexible cable. The lower pressure block is arranged above the base. A plurality of mounting holes are provided on the lower pressure block. A suction nozzle is provided in each mounting hole. The lower side of the suction nozzle abuts against the flexible cable. The suction nozzle is connected to a vacuum generator.

[0010] According to some embodiments of the present invention, a two-way switch valve is provided between the suction nozzle and the vacuum generator.

[0011] According to some embodiments of the present invention, a pressure regulating valve is further provided between the suction nozzle and the vacuum generator.

[0012] According to some embodiments of the present invention, the pressing block is configured as a weight block.

[0013] According to some embodiments of the present invention, a positioning column is provided on the base, and a corresponding positioning hole is provided on the weight block.

[0014] According to some embodiments of the present invention, clamping plates are provided on both sides of the upper end surface of the base, and the weight block is located between the two clamping plates.

[0015] According to some embodiments of the present invention, it is characterized in that the flexible member is a silicone plate.

[0016] According to some embodiments of the present invention, a plurality of limiting blocks are provided on the carrier plate, and the plurality of limiting blocks limit a placement area for the test piece.

[0017] According to some embodiments of the present invention, the carrier plate is movably connected to the base plate via a lifting device.

[0018] A touch screen testing method according to the technical solution of the second aspect of the present invention is applied to the touch screen testing device as described in any one of the above items, comprising the following steps:

[0019] A. Set the balance force between the electrodes and move the carrier plate up to the bottom plate so that the device under test contacts the flexible cable.

[0020] B. Detect the test results of the array electrodes;

[0021] C. If the pressure in a certain area is too high, a vacuum generator is used to connect the nozzle in the corresponding area to generate negative pressure, thereby reducing the contact pressure of the electrode in the area on the DUT until the contact pressure in the area reaches equilibrium with the pressure in the surrounding area.

[0022] The beneficial effects of the present invention are as follows.

[0023] 1. The pressing force is provided by the deadweight of the lower pressing block itself, so that the array electrodes on the flexible flat cable are pressed against the DUT. At the same time, multiple suction nozzles are provided on the lower pressing block, and the suction nozzles are in contact with the flexible flat cable. The vacuum generator can make the suction nozzles generate negative pressure on the flexible flat cable, thereby adjusting the contact pressure of the array electrodes in the corresponding area on the DUT. At the same time, the flexible member between the lower pressing block and the flexible flat cable can ensure that in the process of generating negative pressure, the contact pressure in the corresponding area is reduced with a certain buffer, thereby avoiding the sudden disappearance of the contact pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a touch screen testing device according to an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of the structure of a carrier board according to an embodiment of the present invention;

[0026] Figure 3 A simplified schematic diagram of a test assembly and an adjustment assembly according to an embodiment of the present invention;

[0027] Figure 4 FIG. 1 is a simplified top view of a test structure according to an embodiment of the present invention.

[0028] Figure Number:

[0029] Base plate 100;

[0030] Carrier plate 200, limit block 210;

[0031] Test assembly 300, base 310, positioning column 311, clamping plate 312, flexible flat cable 320, array electrode 321;

[0032] Adjustment assembly 400, weight block 410, mounting hole 411, flexible member 420, suction nozzle 430;

[0033] Vacuum generator 500, two-way switch valve 510. DETAILED DESCRIPTION

[0034] The following content will describe several embodiments of the present invention, including embodiments corresponding to the accompanying drawings. It can be understood that the accompanying drawings are used to assist in understanding the technical features and technical solutions of the present invention, and should not be understood as limiting the scope of protection of the present invention.

[0035] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict.

[0036] It should be noted that, unless otherwise clearly defined, when a feature is referred to as "fixed", "connected", "installed" or "set" on another feature, it can be directly "fixed", "connected", "installed" or "set" on the other feature, or it can be indirectly "fixed", "connected", "installed" or "set" on the other feature. The words "fixed", "connected", "installed" or "set" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0037] It should be noted that the descriptions of the directions or positional relationships indicated by up, down, left, right, top, bottom, front, back, inside, and outside used in the present invention are based on the directions or positional relationships in the drawings or embodiments, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] It should be noted that the term "and / or" used in the present invention includes any combination of one or more related listed items, "above", "below", "within", etc. are understood to include the number itself.

[0039] It should be noted that if the present invention describes first and second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] It should be noted that, unless otherwise explicitly defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention.

[0041] Reference Figures 1 to 4 The technical solution of the first aspect of the present invention relates to a touch screen testing device, which includes: a base plate 100; a carrier plate 200, which is arranged on the base plate 100; a testing component 300, which includes a base 310 and a flexible cable 320, the base 310 is arranged on the base plate 100 and above the carrier plate 200, the flexible cable 320 is arranged below the base 310, and a plurality of array electrodes 321 are provided on the flexible cable 320, and the array electrodes 321 are used to contact the test piece; an adjusting component 400, which includes a lower pressing block and a flexible member 420, the flexible member 420 is arranged between the base 310 and the flexible cable 320, the lower pressing block is arranged above the base 310, and a plurality of mounting holes 411 are provided on the lower pressing block, each mounting hole 411 is provided with a suction nozzle 430, the lower end of the suction nozzle 430 abuts against the flexible cable 320, and the suction nozzle 430 is connected to a vacuum generator 500.

[0042] During the test, the pressing block presses down the flexible member 420 under its own gravity, so that the flexible flat cable below the flexible member 420 presses against the test piece, and a side view of the pressing result is detected, as shown in FIG. Figure 4As shown, at this time, according to the set balance force between the electrodes, it is judged whether the contact pressure of each area is appropriate. If the contact pressure of a certain area or several areas is too large, the vacuum generator 500 generates negative pressure through the suction nozzle of the corresponding area to reduce the contact pressure of the corresponding area, ensuring that the set balance force is achieved between each area, ensuring that the contact pressure of each area is consistent, and improving the test accuracy.

[0043] The application of the above-mentioned touch screen testing device has at least the following beneficial effects: the pressing force is provided by the weight of the lower pressing block itself, so that the array electrodes 321 on the flexible flat cable 320 are pressed against the test piece; at the same time, a plurality of suction nozzles 430 are provided on the lower pressing block, and the suction nozzles 430 abut against the flexible flat cable 320. The vacuum generator 500 can make the suction nozzles 430 generate negative pressure on the flexible flat cable 320, thereby adjusting the contact pressure of the array electrodes 321 in the corresponding area on the test piece; at the same time, the flexible member 420 between the lower pressing block and the flexible flat cable 320 can ensure that in the process of generating negative pressure, the reduction of the contact pressure in the corresponding area is buffered to a certain extent, thereby avoiding the sudden disappearance of the contact pressure.

[0044] According to some embodiments of the present invention, a two-way switch valve 510 is provided between the suction nozzle 430 and the vacuum generator 500. Through the two-way switch valve 510, the suction nozzle 430 can generate negative pressure through the vacuum generator 500 to reduce the contact pressure of the corresponding area, and can also reversely circulate to reduce the negative pressure effect to increase and restore the contact pressure of the corresponding area, thereby realizing two-way adjustment.

[0045] According to some embodiments of the present invention, a pressure regulating valve is further provided between the suction nozzle 430 and the vacuum generator 500, which controls the value of the negative pressure generated and facilitates equal value adjustment to more accurately control the contact pressure of each area to be consistent.

[0046] According to some embodiments of the present invention, the pressing block is configured as a weight block 410 .

[0047] According to some embodiments of the present invention, a positioning column 311 is provided on the base 310 and a corresponding positioning hole is provided on the weight block 410. Through the cooperation between the positioning hole and the positioning column 311, the weight block 410 can be quickly positioned and installed on the base 310.

[0048] According to some embodiments of the present invention, splints 312 are further provided on both sides of the upper end surface of the base 310, and the weight block 410 is located between the two splints 312, which further positions the weight block 410 while preventing the weight block 410 from falling off the base 310 when it becomes skewed during the installation process.

[0049] According to some embodiments of the present invention, the flexible member 420 is characterized in that it is a silicone plate. In some other embodiments, a rubber plate may also be used.

[0050] According to some embodiments of the present invention, a plurality of limiting blocks 210 are provided on the carrier plate 200 , and the plurality of limiting blocks 210 define a placement area for the test piece.

[0051] According to some embodiments of the present invention, the carrier plate 200 is movably connected to the base plate 100 via a lifting device. The carrier plate 200 can be lowered from below the base plate 100 via the lifting device to facilitate fixing the test piece on the carrier plate 200 or removing the test piece after testing. During testing, the carrier plate 200 can be raised to the base plate 100 via the lifting device.

[0052] A touch screen testing method according to the technical solution of the second aspect of the present invention is applied to the touch screen testing device as described in any one of the above items, comprising the following steps:

[0053] A. Set the balance force between the electrodes and move the carrier plate 200 upward onto the base plate 100 so that the DUT contacts the flexible flat cable 320.

[0054] B. Detecting the test results of the array electrode 321;

[0055] C. If the pressure in a certain area is too high, the vacuum generator 500 is connected to the suction nozzle 430 in the corresponding area to generate negative pressure, so that the contact pressure of the electrode in the area on the DUT is reduced until the contact pressure in the area reaches equilibrium with the pressure in the surrounding area.

[0056] It should be noted that, in the above step C, the region pressure being higher means that the pressure in the region is higher than the pressure in the surrounding region, e.g. Figure 4 As shown, for example, the pressure in area A is too high, that is, the pressure of electrode A is greater than the pressure of electrodes B, C, D, and E around it, and the pressure difference between electrode A and electrodes B, C, D, and E exceeds the set balance force value. In this case, after the suction nozzles 1, 2, 3, and 4 around electrode A generate negative pressure, the pressure at electrode A is reduced until the contact pressure at electrode A is consistent with that of electrodes B, C, D, and E, or the pressure difference is less than the balance force value range, and then the negative pressure generation stops.

[0057] In the above step C, refer to Figure 4, where the boxes are electrodes and the dotted triangle lines are the suction nozzles 430 around the corresponding electrodes. When the pressure of electrodes A and F is too high, the vacuum generator drives the suction nozzles 430 at 1, 2, 3, 4, 5, 6, and 7 to generate negative pressure, which reduces the pressure in the area around electrodes A and F, thereby reducing the pressure on electrodes A and F. In this process, the pressure on electrodes A and F can be adjusted by gradually increasing the negative pressure. After detecting that the balance force between electrodes A and F is reached, the pressure of electrodes B, C, D, E, G, L, and H around them must be detected simultaneously. If the electrode pressure value is unqualified, the negative pressure needs to be gradually and equally reduced to achieve a balanced force between the above-mentioned electrodes before the parameter configuration can be output; if only the pressure of electrode A is too large, the vacuum generator 500 drives the suction nozzles at positions 1, 2, 3, and 4 to generate negative pressure, and gradually and equally increase the negative pressure until electrode A reaches a balanced force, and then detect the test results of electrodes B, C, D, and E. If it is unqualified, the negative pressure of the suction nozzles at positions 1, 2, 3, and 4 is gradually and equally reduced to ensure that the pressures between the electrodes at the above-mentioned positions are balanced.

[0058] It should be noted that in this specification, terms such as "one embodiment", "some embodiments", "basic embodiment", "extended embodiment" may be used to describe several embodiments of the present invention. The specific features, structures, materials or characteristics of several embodiments may be combined in accordance with the principles and purposes of the present invention.

[0059] Although some embodiments of the present invention have been shown and described in this specification, the present invention should not be limited to the above-mentioned embodiments. As long as the technical effects of the present invention are achieved by the same or equivalent means, any changes, modifications, equivalent substitutions and equivalent variations to these embodiments within the spirit and principles of the present disclosure and without departing from the principles and purpose of the present invention should be included in the scope of protection of the present disclosure and should be deemed to fall within the scope of protection of the present invention.

Claims

1. A touch screen testing device, characterized in that: include: base plate; A carrier plate, arranged on the bottom plate; The test assembly includes a base and a flexible flat cable, wherein the base is disposed on the bottom plate and above the carrier plate, the flexible flat cable is disposed below the base, and a plurality of array electrodes are disposed on the flexible flat cable, the array electrodes being used to contact the device under test; The adjustment component includes a lower pressure block and a flexible member. The flexible member is arranged between the base and the flexible cable. The lower pressure block is arranged above the base. A plurality of mounting holes are provided on the lower pressure block. A suction nozzle is provided in each mounting hole. The lower side of the suction nozzle abuts against the flexible cable. The suction nozzle is connected to a vacuum generator.

2. The touch screen testing device according to claim 1, wherein: A two-way switch valve is provided between the suction nozzle and the vacuum generator.

3. The touch screen testing device as claimed in claim 2, wherein: A pressure regulating valve is also provided between the suction nozzle and the vacuum generator.

4. The touch screen testing device according to claim 1, wherein: The pressing block is configured as a weight block.

5. The touch screen testing device according to claim 4, wherein: The base is provided with a positioning column, and the weight block is provided with a corresponding positioning hole.

6. The touch screen testing device according to claim 4 or 5, characterized in that: Clamping plates are provided on both sides of the upper end surface of the base, and the weight block is located between the two clamping plates.

7. The touch screen testing device according to claim 1, characterized in that The flexible member is a silica gel plate.

8. The touch screen testing device according to claim 1, wherein: The carrier plate is provided with a plurality of limit blocks, and the plurality of limit blocks limit the placement area of ​​the test piece.

9. The touch screen testing device according to claim 8, wherein: The carrier plate is movably connected to the base plate via a lifting device.

10. A touch screen testing method, applied to the touch screen testing device according to any one of claims 1 to 9, characterized in that: The steps include: A. Set the balance force between the electrodes and move the carrier plate up to the bottom plate so that the device under test contacts the flexible cable. B. Detect the test results of the array electrodes; C. If the pressure in a certain area is too high, a vacuum generator is used to connect the nozzle in the corresponding area to generate negative pressure, thereby reducing the contact pressure of the electrode in the area on the DUT until the contact pressure in the area reaches equilibrium with the pressure in the surrounding area.

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