阅读说明：本技术 一种显示模组整机匹配装置与干涉检查方法 (Complete machine matching device of display module and interference checking method ) 是由 吴磊 黄艳玲 张艳 憨正飞 毛雨路 陈道胜 李勇 于 2020-06-25 设计创作，主要内容包括：本发明公开一种显示模组整机匹配装置与干涉检查方法,匹配装置包括感应模块、采集处理模块和计算机,本发明匹配装置通过在两层厚度相同的上弹性垫片和下弹性垫片之间设置若干薄膜压力传感器组成感应单元,并将感应单元置于显示模组与整机中框之间,通过重物压合完成整机组装,通过感应单元实时采集弹性垫片间的压力信号,并经过一定的数值转换得到显示模组与整机中框间的间隙参数,完成显示模组整机匹配的目的；操作简单,直观测试传感器位置的压力大小,经数值转换获得该位置的配合间隙；干涉检查方法测试结果精准,薄膜压力传感器压力测试数值精准,且操作人员操作过程中对其影响很小。(The invention discloses a complete machine matching device of a display module and an interference checking method, wherein the matching device comprises a sensing module, an acquisition processing module and a computer, a plurality of film pressure sensors are arranged between an upper elastic gasket and a lower elastic gasket which have the same thickness, so as to form a sensing unit, the sensing unit is arranged between the display module and a complete machine middle frame, the complete machine assembly is completed through heavy object pressing, pressure signals between the elastic gaskets are acquired in real time through the sensing unit, and a gap parameter between the display module and the complete machine middle frame is obtained through certain numerical value conversion, so that the complete machine matching purpose of the display module is completed; the operation is simple, the pressure at the position of the sensor is visually tested, and the fit clearance at the position is obtained through numerical value conversion; the interference inspection method is accurate in test result, the pressure test value of the film pressure sensor is accurate, and the influence on the film pressure sensor is small in the operation process of an operator.)

1. A complete machine matching device for a display module is characterized in that the matching device comprises an induction module, an acquisition processing module and a computer (300);

the sensing module comprises a film pressure sensor (110), an anti-interference signal wire (120), an upper elastic gasket (131) and a lower elastic gasket (132);

the acquisition processing module comprises a signal acquisition unit (210), a signal processing unit (220) and a signal conversion unit (230);

the matching device comprises a whole machine rear frame (030), a whole machine middle frame (020) is arranged in the whole machine rear frame (030), a display module (010) is arranged above the upper elastic gasket (131), a pressing plate (040) is arranged on the display module (010), and a pressing block (050) is arranged on the pressing plate (040).

2. The complete machine matching device for display modules according to claim 1, wherein the upper elastic pad (131) and the lower elastic pad (132) are respectively located at two sides of the film pressure sensor (110).

3. The complete machine matching device for display modules according to claim 1, wherein the film pressure sensor (110) is electrically connected with the signal acquisition unit (210) through an anti-interference signal line (120).

4. The complete machine matching device of claim 1, wherein the upper elastic pad (131) and the lower elastic pad (132) are both disposed in the complete machine middle frame (020).

5. The complete machine matching device for display module set of claim 1, the upper end of the display module (010) is provided with a pressing block (050) through a pressing plate (040) to complete the whole press fit, the upper surface of the upper elastic gasket (131) is contacted with the lower surface of the display module (010), the lower surface of the lower elastic gasket (132) is contacted with the upper surface of the whole machine middle frame (020), the pressure signals are transmitted into a signal acquisition unit (210) of a multi-channel signal acquisition and processing machine (200) in real time through an anti-interference signal line (120), the pressure signals transmitted by multiple channels are transmitted into a signal processing unit (220) by the signal acquisition unit (210) in sequence, multiple signal sources enter a signal conversion unit (230) for numerical value conversion, and the pressure signals are converted into corresponding gap signals between a display module (010) and a whole machine middle frame (020).

6. The interference inspection method of the display module according to any one of claims 1 to 5, wherein the interference inspection method is based on the principle of elastic mechanics, the stress of the upper elastic pad (131) and the lower elastic pad (132) adopts a mechanical model of a semi-infinite space body uniformly loaded, the upper surfaces of the upper elastic pad (131) and the lower elastic pad (132) are acted by uniformly distributed unit area load P, the total thickness of the elastic pads with the same thickness is 2H, and the boundary condition of horizontal deformation is: u shape_x＝U_yOn the groundStraight variable boundary conditions: u shape_z＝U_2H；

Deformation in the vertical direction, when the film sensor is arranged at the position where the depth of the elastic gasket is z, the deformation amount and the stress value of the elastic gasket at the corresponding position are as follows:

the film pressure sensor is arranged at the position with the depth H of the elastic gasket, and the stress value is sigma_zThe linear proportional relation between the P + pgH and the load P is adopted, so that the offset pgH can be preset during calibration before the film sensor is tested, that is, theoretically, the stress value in the elastic gasket can be used as the pressing force value applied to the whole machine during the test;

assuming that the vertical stiffness of the upper resilient pad is k₁Lower resilient pad vertical stiffness of k₂According to the theorem of connecting elastic pads in series, the equivalent stiffness value after the elastic pads are connected in series is K equal to 1/(1/K)₁+1/k₂)；

Vertical rigidity k of upper and lower elastic gaskets in matching device₁＝k₂K is K/2;

if the display module is in gapless fit with the middle frame of the whole machine, the deformation of the elastic gasket at the moment is as follows:

if the display module has clearance fit with the whole machine middle frame, the deformation of the elastic gasket is as follows:

in summary, the gap between the display module and the entire device can be obtained as follows:

if Deltax is larger than 0, the display module and the complete machine are partially in clearance fit, and a certain clearance exists between the display module and the complete machine;

if deltax is 0, the display module and the whole machine are partially in over fit, and no gap or interference exists between the display module and the whole machine;

if Deltax is less than 0, then there is interference fit between the display module and the whole machine, and there is an interference structure locally between the two.

7. The method for inspecting the interference of a display module according to claim 6, wherein the U is set to be U-shaped_xVariable representing position on x-square, U_yVariable representing position on y-square, U_zVariable representing position in z-square, U_2HA variable indicating a position in the thickness direction of the elastic pad.

8. The method for inspecting the interference of a display module according to claim 6, wherein w is_zIs the amount of deformation, σ_zIs a stress value; v is the Poisson's ratio of the elastic gasket material; rho is the density of the elastic gasket; e is the modulus of elasticity; g is the acceleration of gravity.

9. The method for inspecting the interference of a display module according to claim 6, wherein P is an applied load, G_mThe weight of the module is displayed.

10. The display module interference inspection method according to claim 6, wherein P is the weight of the pressing block (050) and the pressing plate (040) and is obtained by measurement of an electronic balance before a complete machine matching test; gm is the weight of the display module and is obtained by measuring through an electronic balance before the complete machine matching test; q_zThe pressure signal parameters obtained by testing the film pressure sensor are dynamic parameters, so that after the pressing block (050) and the pressing plate (040) are pressed on the whole machine for a period of time, the pressure signal parameters to be tested are required to be pressed on the whole machine for ensuring the accuracy of test dataCollecting pressure signals when the data are kept stable; k is the vertical rigidity of the elastic gasket, the weight of the pressing block (050) and the weight of the display module (010) are 3kg-5kg, and the size of a gap between the display module and the whole machine is 0-0.5mm, so that the value range of the vertical rigidity k of the elastic gasket is kept as follows in order to ensure the accuracy of data acquisition: 58.8N/mm-98.0N/mm.

Technical Field

The invention relates to display module production, in particular to a complete machine matching device of a display module and an interference checking method.

Background

The current commonly used display module complete machine matching test mainly comprises two methods of a pressure sensing paper method test and a height gauge point inspection test. The pressure sensing paper testing method mainly comprises the steps that two layers of pressure sensing test paper coated with chemical agents are oppositely attached to the coating surface of the pressure sensing test paper, the pressure sensing test paper is cut into a proper shape size according to the external outline of a display module and a whole machine middle frame, the whole machine unit is rotated to finish and is placed between the display module and the whole machine middle frame, the weight on the front side of the display module is pressed for a certain time, the pressure sensing paper is taken out to observe whether erythema occurs, the cost of the pressure sensing paper testing method is high, the price of a roll of pressure sensing paper is up to thousands of yuan, in the testing process, the phenomenon of erythema is easily caused by cutting, picking and placing actions of a tester, and the judgment of interference positions and the final testing result are influenced. And the height gauge point inspection mainly utilizes the height gauge to measure the thickness dimension of the display module and the groove depth of the corresponding position of the middle frame respectively, and the gap or interference exists when the matching position of the display module and the middle frame of the whole machine is determined by comparison.

The height gauge test has higher requirement on the levelness of the test platform, the plane of the rear frame is required to be consistent, a local convex structure cannot appear, the test operation difficulty is high, the test error is larger, and the distortion of the test result is caused.

Disclosure of Invention

The invention aims to provide a complete machine matching device of a display module and an interference checking method, wherein a plurality of film pressure sensors are arranged between an upper elastic gasket and a lower elastic gasket which have the same thickness, so as to form a sensing unit, the sensing unit is arranged between the display module and a complete machine middle frame, the complete machine assembly is completed through heavy object pressing, pressure signals between the elastic gaskets are collected in real time through the sensing unit, and clearance parameters between the display module and the complete machine middle frame are obtained through certain numerical value conversion, so that the complete machine matching purpose of the display module is completed, the whole device is simple to operate, the pressure of the sensor position is visually tested, and the matching clearance of the position is obtained through numerical value conversion; the test result is accurate, the pressure test value of the film pressure sensor is accurate, and the influence on the film pressure sensor is small in the operation process of an operator; the film pressure sensor is arranged between the display module and the middle frame, so that the requirement on the flatness of the rear frame is low, and the gap and the interference condition between the display module and the middle frame can be intuitively reflected.

The purpose of the invention can be realized by the following technical scheme:

a complete machine matching device for a display module comprises an induction module, a collection processing module and a computer.

The sensing module comprises a film pressure sensor, an anti-interference signal wire, an upper elastic gasket and a lower elastic gasket.

The acquisition processing module comprises a signal acquisition unit, a signal processing unit and a signal conversion unit.

The matching device comprises a whole machine rear frame, a whole machine middle frame is arranged in the whole machine rear frame, a display module is arranged above the upper elastic gasket, a pressing plate is arranged on the display module, and a pressing block is arranged on the pressing plate.

Furthermore, the upper elastic gasket and the lower elastic gasket are respectively positioned at two sides of the film pressure sensor.

Furthermore, the film pressure sensor is electrically connected with the signal acquisition unit through an anti-interference signal line.

Furthermore, the upper elastic gasket and the lower elastic gasket are arranged in the middle frame of the whole machine.

Furthermore, a pressing block is placed at the upper end of the display module through a pressing plate to complete press fit of the whole machine, the upper surface of the upper elastic gasket is in contact with the lower surface of the display module, the lower surface of the lower elastic gasket is in contact with the upper surface of the middle frame of the whole machine, pressure signals are transmitted into a signal acquisition unit of the multichannel signal acquisition and processing machine in real time through an anti-interference signal line, the signal acquisition unit sequentially transmits the pressure signals transmitted by the multichannel channels into a signal processing unit, and the multichannel signal sources enter a signal conversion unit to perform numerical value conversion so as to convert the pressure signals into corresponding gap signals between the display module and the middle frame of the whole machine.

The utility model provides a display module assembly interference inspection method, interference inspection method is according to the elastomechanics principle, goes up the mechanics model that elasticity gasket and lower elasticity gasket atress adopted the semi-infinite space body to receive the equipartition load, and the upper surface of going up elasticity gasket and lower elasticity gasket receives evenly distributed's unit area load P effect, and the elasticity gasket gross thickness that the thickness is the same is 2H, horizontal deformation volume boundary condition: u shape_x＝U_yBoundary conditions of vertical deformation at the ground: u shape_z＝U_2H。

Because only the deformation in the vertical direction is considered, when the film sensor is arranged at the position with the depth of z, the deformation amount and the stress value of the elastic gasket at the corresponding position are as follows:

the film pressure sensor is arranged at the position with the depth H of the elastic gasket, and the stress value is sigma_zSince P + pgH is linearly proportional to the load P, the offset pgH can be preset during calibration before the film sensor is tested, i.e., theoretically, the stress value in the elastic gasket can be used as the pressing force value applied to the whole machine during the test.

Assuming that the vertical stiffness of the upper resilient pad is k₁Lower resilient pad vertical stiffness of k₂According to the theorem of connecting elastic pads in series, the equivalent stiffness value after the elastic pads are connected in series is K equal to 1/(1/K)₁+1/k₂)。

Vertical rigidity k of upper and lower elastic gaskets in matching device₁＝k₂When k, then carry over toK＝k/2。

If the display module is in gapless fit with the middle frame of the whole machine, the deformation of the elastic gasket at the moment is as follows:

if the display module has clearance fit with the whole machine middle frame, the deformation of the elastic gasket is as follows:

in summary, the gap between the display module and the entire device can be obtained as follows:

if Deltax is larger than 0, the display module and the complete machine are partially in clearance fit, and a certain clearance exists between the display module and the complete machine;

if deltax is 0, the display module and the whole machine are partially in over fit, and no gap or interference exists between the display module and the whole machine;

if Deltax is less than 0, then there is interference fit between the display module and the whole machine, and there is an interference structure locally between the two.

Further, the U is_xVariable representing position on x-square, U_yVariable representing position on y-square, U_zVariable representing position in z-square, U_2HA variable indicating a position in the thickness direction of the elastic pad.

Further, w is_zIs the amount of deformation, σ_zIs a stress value; v is the Poisson's ratio of the elastic gasket material; rho is the density of the elastic gasket; e is the modulus of elasticity; g is the acceleration of gravity.

Further, P is an applied load, G_mThe weight of the module is displayed.

Further, the P is the weight of the pressing block and the pressing plate and is obtained by measuring through an electronic balance before the complete machine matching test; gm is the weight of the display module and needs to be matched in the whole machineThe test result is obtained by measuring through an electronic balance before testing; q_zThe method comprises the steps that pressure signal parameters are obtained for testing a film pressure sensor, and because the pressure signal parameters are dynamic parameters, in order to ensure the accuracy of test data, after a press block and a press plate are pressed on a whole machine for a period of time, the pressure signals are collected when the data to be tested are stable; k is the vertical rigidity of the elastic gasket, the weight of the pressing block and the weight of the display module are 3kg-5kg, and the size of a gap between the display module and the whole machine is 0-0.5mm, so that in order to ensure the accuracy of data acquisition, the value range of the vertical rigidity k of the elastic gasket is kept as follows: 58.8N/mm-98.0N/mm.

The invention has the beneficial effects that:

1. the matching device comprises an induction unit, a display module, a whole machine middle frame, a plurality of thin film pressure sensors, a plurality of elastic gaskets, a plurality of weight pressing units and a plurality of film pressure sensors, wherein the film pressure sensors are arranged between the upper elastic gasket and the lower elastic gasket which are of the same thickness;

2. the matching device is simple to operate, the pressure of the position of the sensor is visually tested, and the fit clearance of the position is obtained through numerical value conversion;

3. the interference inspection method has accurate test result, accurate pressure test value of the film pressure sensor and little influence on the pressure test value in the operation process of an operator;

4. according to the interference inspection method, the film pressure sensor is arranged between the display module and the middle frame, so that the requirement on the flatness of the rear frame is low, and the gap and the interference condition between the display module and the middle frame can be intuitively reflected.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a portion of the matching device of the present invention;

FIG. 2 is a schematic diagram of a portion of the matching device of the present invention;

FIG. 3 is a schematic diagram of a mechanical model of the elastic pad of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A complete machine matching device for a display module comprises an induction module, an acquisition processing module and a computer 300, as shown in figures 1 and 2.

The sensing module comprises a film pressure sensor 110, an anti-interference signal line 120, an upper elastic gasket 131 and a lower elastic gasket 132, the film pressure sensor 110 is used for collecting pressure values in real time, the anti-interference signal line 120 is used for transmitting pressure signals, and the interference of other electromagnetic signals to signal transmission is prevented, the upper elastic gasket 131 and the lower elastic gasket 132 are respectively positioned on two sides of the film pressure sensor 110 and used for protecting the film pressure sensor 110, and the sensor scratch and the module PCB electrical element falling caused by the direct contact of the film pressure sensor with a display module or a middle frame are prevented, on the other hand, the pressure values can be converted into the deformation values of the elastic gaskets at the position, and the original gap values are obtained through value conversion.

The acquisition processing module comprises a signal acquisition unit 210, a signal processing unit 220 and a signal conversion unit 230, the acquisition processing module is used for acquiring original pressure signals, the film pressure sensor 110 is electrically connected with the signal acquisition unit 210 through an anti-interference signal line 120, the signal processing unit 220 is used for performing relevance analysis on signals of all channels to ensure that the signals of all channels do not interfere with each other, and the signal conversion unit 230 is used for converting the acquired pressure signals of all channels into corresponding gap sizes between the display module and the middle frame through a plurality of numerical value conversions. The computer 300 is used for setting relevant parameters and visually outputting test results.

The matching device comprises a whole machine rear frame 030, a whole machine middle frame 020 is arranged in the whole machine rear frame 030, an upper elastic gasket 131 and a lower elastic gasket 132 are arranged in the whole machine middle frame 020, a display module 010 is arranged above the upper elastic gasket 131, a pressing plate 040 is arranged on the display module 010, a pressing block 050 is arranged on the pressing plate 040, the pressing block 050 is placed at the upper end of the display module 010 through the pressing plate 040 to complete whole machine pressing, the upper surface of the upper elastic gasket 131 is in contact with the lower surface of the display module 010, the lower surface of the lower elastic gasket 132 is in contact with the upper surface of the whole machine middle frame 020 to collect pressure distribution at different positions in real time, pressure signals are transmitted into a signal collecting unit 210 of the multi-channel signal collecting and processing machine 200 through an anti-interference signal line 120 in real time, the signal collecting unit 210 sequentially transmits the pressure signals transmitted by multiple channels into a signal processing unit 220, and the signal processing unit, the method ensures that the multipath signals are not interfered with each other, and improves the accuracy of signal acquisition. And the multi-channel signal source without interference is confirmed to enter the signal conversion unit 230 for numerical value conversion, and the pressure signal is converted into a gap signal between the corresponding display module 010 and the whole machine middle frame 020, so that the whole machine matching test of the display module is completed.

According to the principle of elastic mechanics, an upper elastic gasket 131 and a lower elastic gasket 132 are stressed by adopting a mechanical model that a semi-infinite space body is uniformly loaded, as shown in fig. 3, the upper surfaces of the upper elastic gasket 131 and the lower elastic gasket 132 are uniformly loaded by unit area load P, the total thickness of the elastic gaskets with the same thickness is 2H, and the boundary condition of horizontal deformation is as follows: u shape_x＝U_yBoundary conditions of vertical deformation at the ground: u shape_z＝U_2H，U_xVariable representing position on x-square, U_yVariable representing position on y-square, U_zVariable representing position in z-square, U_2HA variable indicating a position in the thickness direction of the elastic pad.

Since only the deformation in the vertical direction (z direction) is considered, when the film sensor is placed at a position with the depth z of the elastic gasket, the deformation amount and the stress value of the elastic gasket at the corresponding position are as follows:

in the formula, w_zIs the amount of deformation, σ_zIs a stress value; v is the Poisson's ratio of the elastic gasket material; rho is the density of the elastic gasket; e is the modulus of elasticity; g is the acceleration of gravity.

The film pressure sensor is arranged at the position with the depth H of the elastic gasket, and the stress value is sigma_zP + pgH, is linearly proportional to the load P. Therefore, the offset pgH can be preset during calibration before the film sensor is tested, i.e. theoretically, the stress value in the elastic gasket can be used as the pressing force value applied to the whole machine during the test.

Assuming that the vertical stiffness of the upper resilient pad is k₁Lower resilient pad vertical stiffness of k₂According to the theorem of connecting elastic pads in series, the equivalent stiffness value after the elastic pads are connected in series is K equal to 1/(1/K)₁+1/k₂)。

Vertical rigidity k of upper and lower elastic gaskets in matching device₁＝k₂K is then given as K/2.

If the display module is in gapless fit with the middle frame of the whole machine, the deformation of the elastic gasket at the moment is as follows:

in which P is the action of an applied load, G_mThe weight of the module is displayed.

If the display module has clearance fit with the whole machine middle frame, the deformation of the elastic gasket is as follows:

in summary, the gap between the display module and the entire device can be obtained as follows:

if Deltax is larger than 0, the display module and the complete machine are partially in clearance fit, and a certain clearance exists between the display module and the complete machine;

if deltax is 0, the display module and the whole machine are partially in over fit, and no gap or interference exists between the display module and the whole machine;

if Deltax is less than 0, then there is interference fit between the display module and the whole machine, and there is an interference structure locally between the two.

P is the weight of the pressing block 050 and the pressing plate 040 and is obtained by measurement of an electronic balance before the complete machine matching test; gm is the weight of the display module and is obtained by measuring through an electronic balance before the complete machine matching test; q_zThe pressure signal parameters obtained by testing the film pressure sensor are dynamic parameters, so that in order to ensure the accuracy of test data, the pressure signal is acquired when the to-be-tested data is kept stable after the whole machine is pressed by the pressing block 050 and the pressing plate 040 for a period of time; k is the vertical rigidity of the elastic gasket, because the weight of the pressing block 050 and the weight of the display module 010 are generally 3kg-5kg, and the size of the gap between the display module and the whole machine is 0-0.5mm, in order to ensure the accuracy of data acquisition, the value range of the vertical rigidity k of the elastic gasket is kept as follows: 58.8N/mm-98.0N/mm. The number of electric elements on the PCB board is large, the cross-sectional structure is complex, and elastic materials such as rubber and foam are selected as the elastic gaskets for ensuring the ductility of the elastic gaskets.

When the device is used, a plurality of film pressure sensors 110 are arranged between an upper elastic gasket 131 and a lower elastic gasket 132 which are of the same thickness in two layers to form a sensing unit, the sensing unit is arranged between a display module and a middle frame of the whole device, the whole device is assembled by pressing a pressing block 050, pressure signals between the elastic gaskets are collected in real time through the sensing unit, gap parameters between the display module and the middle frame of the whole device are obtained through certain numerical value conversion, and the purpose of matching the display module with the whole device is fulfilled; the test result is accurate, the pressure test value of the film pressure sensor is accurate, and the influence on the film pressure sensor is small in the operation process of an operator; the film pressure sensor is arranged between the display module and the middle frame, so that the requirement on the flatness of the rear frame is low, and the gap and the interference condition between the display module and the middle frame can be intuitively reflected.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.