Detection control device of pressing base

Abstract

The utility model relates to the technical field of display, and provides a detection control device of a press-fit base, which comprises a plurality of pressure sensors distributed on one side, close to a press-fit surface, in the press-fit base in an array manner and used for respectively acquiring pressure values of the press-fit base when the press-fit base is stressed; the detection control circuit detects the pressure values of the multiple pressure sensors in real time in the press fit stage of the press head on the press fit base, when the pressure values exceed a preset threshold value, an early warning signal is sent out, and the press head receives the early warning signal to stop action and reset and receives a starting signal after the early warning signal is relieved to conduct press fit action. Therefore, the flatness of the press-fit base can be detected in real time, digital quantity is used for replacing analog quantity to quantitatively describe the flatness of the press-fit base, the accuracy, real-time performance and convenience of a system are improved, poor continuity can be avoided, and the material loss cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a detection control device for a pressing base. Background Art

[0002] LCD (Liquid Crystal Display) display module (Liquid Crystal Module, LCM) is a component that assembles liquid crystal display screen, drive circuit, FPC (flexible printed circuit), backlight and other structural parts together. The mechanical connection and electrical conduction between the liquid crystal glass and the drive circuit and FPC in the liquid crystal display screen are the core parts of LCM production.

[0003] At present, in the existing LCM liquid crystal module production process, it is usually necessary to press the IC / FPC and the thin film transistor (TFT) by the pressure of the cutter head, and the pressing base is required as a supporting platform during pressing. However, in the existing production process, the pressing base is cleaned at the beginning of the shift, that is, it is cleaned before production, and if foreign matter is generated during the production process, it cannot be discovered in time. At the same time, the cleaning effect is generally measured visually, and the cleaning effect cannot be quantified. There are cases where personnel inspection fails. At the same time, abnormalities often occur during the front-end incoming material production process: LCD liquid crystal finished panel (cell) incoming materials have poor cutting or cracks, which will cause glass debris to fall off on the pressing base during the pressing process, which will cause the TFT to be continuously crushed during the pressing process during the production process. It will not be discovered until the personnel check after the output of the external pin bonding process section (OLB), resulting in batch defects that cannot be discovered in time, and then causing material scrapping and machine downtime, which not only affects normal production efficiency, but also increases the number of scraps and increases costs, which is not conducive to production and manufacturing. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a detection and control device for a pressing base, which can detect the flatness of the pressing base in real time, improve the defective rate of pressing and scrapping, save material loss costs, and at the same time improve safety detection efficiency and production quality.

[0005] The utility model provides a detection control device for a pressing base, comprising:

[0006] A plurality of pressure sensors, wherein the plurality of pressure sensor arrays are distributed on one side of the pressing base close to the pressing surface, and respectively obtain pressure values ​​when the pressure sensors are subjected to force;

[0007] The detection control circuit is respectively connected to the electrical lead terminals of the plurality of pressure sensors. The detection control circuit detects the pressure values ​​of the plurality of pressure sensors in real time when the pressure head is pressing on the pressing base, and sends out an early warning signal when the pressure value exceeds a preset threshold.

[0008] The pressing head stops the action and resets when receiving the warning signal, and performs the pressing action when receiving the start signal after the warning signal is released.

[0009] In some embodiments, the distribution area of ​​the plurality of pressure sensor arrays is greater than or equal to the projection area of ​​the pressure head on the surface of the pressing base.

[0010] In some embodiments, the distribution area of ​​the plurality of pressure sensor arrays is the same as the projection area of ​​the structure to be pressed on the surface of the pressing base.

[0011] In some embodiments, the detection control circuit includes:

[0012] A digital switch module, wherein input terminals of the digital switch module are electrically connected to electrical lead-out terminals of the plurality of pressure sensors in a one-to-one correspondence, and select at least one of the pressure values ​​inputted by the plurality of pressure sensors;

[0013] An analog-to-digital conversion module, which is connected to the output terminal of the digital switch module and converts the received pressure information into a digital voltage signal;

[0014] A main controller receives a clock signal and processes and calculates the digital voltage signal, and issues the warning signal when the digital voltage signal exceeds a preset threshold.

[0015] In some embodiments, the detection control circuit further includes:

[0016] A timing control module, wherein the timing control module receives a control instruction from the main controller to generate a clock signal, and outputs the clock signal to the digital switch module, the analog-to-digital conversion module and the main controller respectively;

[0017] A power supply module, wherein the power supply module provides operating voltage to the timing control module and the main controller.

[0018] In some embodiments, the detection control circuit further includes:

[0019] A serial communication module is connected between the main controller and the host computer to transmit data between the main controller and the host computer.

[0020] The host computer receives the warning signal and the start signal to control the start, stop and reset actions of the pressure head, and displays data of the received digital voltage signal.

[0021] In some embodiments, the digital switch module is a complex programmable logic device.

[0022] In some embodiments, if the digital voltage signals corresponding to the multiple pressure sensors are the same, the pressing surface of the pressing base is flat; if the digital voltage signals corresponding to the multiple pressure sensors are different and there is a digital voltage signal that exceeds the preset threshold, there is foreign matter on the pressing surface of the pressing base.

[0023] In some embodiments, the digital switch module, the analog-to-digital conversion module, the main controller, the timing control module, the power module and the serial communication module are integrated on the same chip.

[0024] In some embodiments, the spacings between the multiple pressure sensors are the same or gradually decrease from the center to the periphery.

[0025] The beneficial effects of the utility model are as follows: the utility model provides a detection and control device for a pressing base, which includes: a plurality of pressure sensors, the array of the plurality of pressure sensors is distributed on one side of the pressing base close to the pressing surface, and the pressure values ​​when the pressure is subjected to force are obtained respectively; a detection and control circuit, which is respectively connected to the electrical lead terminals of the plurality of pressure sensors, and the pressure head performs the pressing stage on the pressing base, and detects the pressure values ​​of the plurality of pressure sensors in real time. When the pressure value exceeds the preset threshold, an early warning signal is issued, and the pressure head receives the early warning signal to stop the action and reset, and receives the start signal after the early warning signal is released to perform the pressing action. In this way, the flatness of the pressing base can be detected in real time, and the digital quantity can be used instead of the analog quantity to quantitatively describe the flatness of the pressing base, thereby improving the accuracy, real-time performance, and convenience of the system, avoiding the occurrence of poor continuity, and saving material loss costs.

[0026] At the same time, the safety detection efficiency and the inspection accuracy of the flatness of the press-fit base are improved and quantified, which is conducive to improving production quality.

[0027] In addition, real-time detection also effectively saves time for opening inspections and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0029] Figure 1a and Figure 1bThe schematic diagram of the structure of the press-fit base in the prior art and the schematic diagram when foreign matter exists on the surface of the base are respectively shown;

[0030] Figure 2 A schematic structural diagram of a detection and control device for pressing a base provided in an embodiment of the utility model is shown;

[0031] Figure 3 Shown for Figure 2 The schematic diagram of the working principle of the detection control device shown;

[0032] Figure 4 Show Figure 2 The circuit structure block diagram of the detection control device shown;

[0033] Figure 5 Show Figure 2 A schematic diagram of the equally spaced distribution of pressure sensors in the press-fit base shown;

[0034] Figure 6 Show Figure 2 The schematic diagram of data obtained by the detection control device when there is no foreign matter on the surface of the pressing base shown;

[0035] Figure 7 Show Figure 2 Schematic diagram of the application model when there is foreign matter on the surface of the press-fit base;

[0036] Figure 8 Show Figure 7 The diagram is a schematic diagram of data obtained by the detection control device when foreign matter exists on the surface of the pressing base. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0039] Figure 1a and Figure 1bThe schematic diagram of the structure of the pressing base in the prior art and the schematic diagram when there are foreign objects on the surface of the base are respectively shown. In the existing LCM pressing process, the IC / FPC and the TFT need to be pressed by the pressure of the pressing head, and the pressing base is required as a supporting platform during pressing. Figure 1a As shown, the supply end on the left is continuously clamped by the clamp to make the buffer material stably transmitted to the recovery end in a belt-like manner, avoiding the same area from being continuously stressed and causing wear and tear that affects the quality and efficiency of batch pressing. At the same time, two rollers are used to adjust the pressing area of ​​the pressure head and the pressing height according to the object to be pressed. Figure 1b , focusing on the pressing part of the pressure head, the buffer material layer is located directly below the pressure head in the existing device, and the object to be pressed is between the buffer material layer and the pressing base. In the LCM pressing process, the object to be pressed is IC / FPC / TFT, Figure 1a The figure below shows an example of FPC lamination.

[0040] In the actual production process, the pressing base is currently cleaned at the beginning of the shift. If foreign matter is generated during the production process, it cannot be discovered in time. The incoming LCD liquid crystal panel (cell) may have poor cutting or cracks. During the pressing process, glass debris will fall off on the pressing base to form foreign matter, such as Figure 1b As shown, the pressing surface of the pressing base is uneven, resulting in continuous crushing of the TFT during pressing during the production process. The TFT is not discovered until the output of the external pin bonding process section (OLB) is inspected by personnel. This results in batch defects not being discovered in time, which in turn causes batch material scrapping and machine downtime, which not only affects normal production efficiency, but the increase in the number of scraps will also lead to increased costs, which is not conducive to production manufacturing.

[0041] Based on this, an embodiment of the utility model proposes a detection and control device for a pressing base, which can detect the flatness of the pressing base in real time, improve the defective rate of pressing and scrapping, save material loss costs, and at the same time improve safety detection efficiency and production quality.

[0042] Below, the utility model is described in detail with reference to the accompanying drawings.

[0043] Figure 2 The following is a schematic diagram showing the structure of a detection and control device for pressing a base provided in an embodiment of the utility model. Figure 3 Shown for Figure 2 The working principle diagram of the detection and control device shown in FIG. Figure 4 Show Figure 2 The circuit structure block diagram of the detection control device is shown.

[0044] like Figure 2 and Figure 4As shown, the embodiment of the utility model provides a detection control device for a pressing base, which includes: a plurality of pressure sensors 210 and a detection control circuit 100,

[0045] Among them, a plurality of pressure sensors 210 are arrayed and distributed on one side of the pressing base 200 close to the pressing surface, and the pressure values ​​of the plurality of pressure sensors 210 when subjected to force are respectively obtained;

[0046] The detection control circuit 100 is respectively connected to the electrical lead terminals of the plurality of pressure sensors 210, so that the pressure head 300 detects the pressure values ​​of the plurality of pressure sensors 210 in real time during the pressing stage on the pressing base 200, and sends out an early warning signal when there is a pressure value exceeding a preset threshold value.

[0047] The pressing head 300 stops the action and resets when receiving the warning signal, and performs the pressing action when receiving the start signal after the warning signal is released.

[0048] In some embodiments, the array distribution area of ​​the multiple pressure sensors 210 is greater than or equal to the projection area of ​​the pressure head 300 on the surface of the pressing base 200. This ensures that the purpose of pressure detection in each area can always be met when the pressure head 300 is working, and there will be no omission or waste of resources caused by multiple arrangements.

[0049] In other embodiments, the distribution area of ​​the array of the multiple pressure sensors 210 is the same as the projection area of ​​the structure to be pressed on the surface of the pressing base 200. This fully utilizes the effective working area of ​​the pressing head 300, reduces additional resources and calculations, and improves the detection efficiency to a certain extent.

[0050] In some embodiments, Figure 4 As shown, the detection control circuit 100 may include at least: a main controller 120, an analog-to-digital conversion module 130 and a digital switch module 140.

[0051] The input terminals of the digital switch module 140 are electrically connected to the electrical lead-out terminals of the plurality of pressure sensors 210 in a one-to-one correspondence, and select at least one of the pressure values ​​of the plurality of pressure sensors 210 for input;

[0052] The analog-to-digital conversion module 130 is connected to the output terminal of the digital switch module 140 to convert the received pressure information into a digital voltage signal;

[0053] The main controller 120 receives the clock signal CLK and processes and calculates the digital voltage signal. When the digital voltage signal exceeds a preset threshold, the warning signal is issued.

[0054] Furthermore, in some embodiments, the detection control circuit 100 further includes: a power supply module 110 and a timing control module 150,

[0055] The timing control module 150 receives the control instruction of the main controller 120 and generates a clock signal CLK, and outputs the clock signal CLK to the digital switch module 140, the analog-to-digital conversion module 130 and the main controller 120 respectively;

[0056] The power module 110 provides operating voltage to the timing control module 150 and the main controller 120 .

[0057] In some embodiments, the detection control circuit 100 may further include: a serial communication module 160 and a host computer 170, wherein the serial communication module 160 is connected between the main controller 120 and the host computer 170 to transmit and communicate data between the main controller 120 and the host computer 170;

[0058] The host computer 170 controls the start, stop and reset actions of the pressure head 300 according to the warning signal and the start signal, and displays data of the received digital voltage signal.

[0059] Combination Figure 3 and Figure 4 In this embodiment, the pressure sensor 210 can convert the mechanical signal sensed by the pressure head 300 into an electrical signal (voltage U) that can be received, and process it into a corresponding digital signal (quantized value, such as: 0~255) through a certain digital circuit (AD conversion), and then realize the real-time display of each sensor data through the computer (host computer). In this way, when there is a foreign matter on the pressing surface of the pressing base 200, the object to be pressed (taking TFT as an example, the same below) will be deformed, and the pressure borne by each independent pressure sensor 210 inside the pressing base 200 will be different. When the pressure value detected by a certain pressure sensor 210 exceeds the preset pressure specification control range, the machine can alarm and pause in time to achieve the effect of real-time detection of the flatness of the pressing base.

[0060] In this embodiment, the digital switch module 140 is, for example, a complex programmable logic device (CPLD). The main controller 120 is, for example, an MSP430 chip, and the analog-to-digital conversion module 130 is, for example, an ADC0832 chip.

[0061] In some embodiments, the digital switch module 140 , the analog-to-digital conversion module 130 , the main controller 120 , the timing control module 150 , the power module 110 and the serial communication module 160 are integrated on the same chip.

[0062] In some other embodiments, the spacing between the multiple pressure sensors 210 is the same (eg Figure 5 As shown) or gradually decreasing from the center to the surrounding in a gradient, which is not limited here, and can be considered in combination with the material, size, thickness, deformation performance, etc. of the object to be pressed.

[0063] Specifically in this embodiment, n pressure sensors 210 are evenly distributed near the pressing surface in the pressing base 200. The pressure sensors 210 can sense the pressure applied by the pressure head 300 to the TFT bonding layer and collect it as an electrical signal that can be received. The number of pressure sensors 210 can be set according to the width of the pressing base 200, and the size of the pressure sensor 210 can also be selected according to the space of the pressing base 200. For example, the number of pressure sensors 210 can be n (n=2N, N is an integer), and the number of channels of the multiple-selection digital switch input terminal of the CPLD 140 is also the same (matching the number of pressure sensors 210); the timing control module 150 provides a clock signal CLK detected by each pressure sensor 210 to control the detection timing of each pressure sensor 210; the CPLD 140 collects the pressure data obtained by each pressure sensor 210 according to the clock signal CLK provided by the timing control module 150, and transmits it to the ADC0832 device 130; the ADC0832 130 is an analog-to-digital converter, which converts the received pressure electrical signal into a digital signal and transmits it to the MSP430 device 120; the main controller (SOC) adopts the MSP430 series low-power processor, and uses an independent clock to ensure that each unit works synchronously. The AD conversion part uses an 8-bit AD conversion chip for data conversion; MSP430 is the main controller 120, which can send instructions to make the timing control module 150 and the ADC0832 device work together; MSP430 120 can perform signal processing, interpret the pressure digital signal, and convert it into a pressure value; RS232 is a serial communication module 160, which transmits the pressure value to the host computer 170; the host computer 170 is a data display terminal, which presents the real-time pressure values ​​corresponding to each pressure sensor 210 on the display interface; the host computer 170 can set the pressure specification range (such as Figure 6 As shown in the figure, if the pressure value corresponding to the sensor exceeds the specification range, an early warning signal is generated to alarm; the machine alarm can promptly inform engineers of abnormal information and handle it.

[0064] In some embodiments, the digital voltage signals corresponding to the multiple pressure sensors 210 are the same, indicating that the pressing surface of the pressing base 200 is flat. When the digital voltage signals corresponding to the multiple pressure sensors 210 are different and there is a digital voltage signal that exceeds the preset threshold, it indicates that there is a foreign object on the pressing surface of the pressing base 200. When there is no foreign object on the pressing base 200, each sensor is evenly stressed and within the set control range, and the machine works normally. Figure 5 and Figure 6 As shown in FIG. 1 ; when there is foreign matter on the surface of the pressing base 200, the TFT is partially deformed and the force on the sensor is uneven. The force on the sensor on both sides of the foreign matter is reduced (such as Figure 7 As shown: the pressure of the two sensors n / 2-1 and n / 2+1 decreases), exceeding the set control range (such as Figure 8 This enables automatic and uninterrupted real-time detection of the flatness of the press base, and timely alarms when abnormalities occur.

[0065] In summary, the embodiment of the utility model provides a detection control device for a pressing base 200, which includes: a plurality of pressure sensors 210, the plurality of pressure sensors 210 arrays are distributed on one side of the pressing base 200 close to the pressing surface, and the pressure values ​​when the pressure is subjected to force are obtained respectively; a detection control circuit 100, respectively connected to the electrical lead terminals of the plurality of pressure sensors 210, the pressure head 300 detects the pressure values ​​of the plurality of pressure sensors 210 in real time during the pressing stage on the pressing base 200, and when a pressure value exceeds a preset threshold, an early warning signal is issued, the pressure head 300 receives the early warning signal to stop the action and reset, and receives the start signal after the early warning signal is released to perform the pressing action. In this way, the flatness of the pressing base 200 can be detected in real time, and the digital quantity can be used instead of the analog quantity to quantitatively describe the flatness of the pressing base 200, thereby improving the accuracy, real-time performance, and convenience of the system, avoiding the occurrence of poor continuity, and saving material loss costs.

[0066] At the same time, the safety detection efficiency and the inspection accuracy of the flatness of the pressing base 200 are improved and quantified, which is beneficial to improving production quality.

[0067] In addition, real-time detection also effectively saves time for opening inspections and improves production efficiency.

[0068] It should be noted that in the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements 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.

[0069] In addition, in this article, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0070] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A detection and control device for a pressing base, characterized in that: include: A plurality of pressure sensors, wherein the plurality of pressure sensor arrays are distributed on one side of the pressing base close to the pressing surface, and respectively obtain pressure values ​​when the pressure sensors are subjected to force; A detection control circuit is connected to the electrical lead terminals of the multiple pressure sensors respectively. The detection control circuit detects the pressure values ​​of the multiple pressure sensors in real time when the pressure head is pressing on the pressing base, and sends out an early warning signal when the pressure value exceeds a preset threshold value; The pressing head stops the action and resets upon receiving the warning signal, and performs the pressing action upon receiving the start signal after the warning signal is released.

2. The detection control device according to claim 1, wherein: The distribution area of ​​the plurality of pressure sensor arrays is greater than or equal to the projection area of ​​the pressure head on the surface of the pressing base.

3. The detection control device according to claim 1, wherein: The distribution area of ​​the plurality of pressure sensor arrays is the same as the projection area of ​​the structure to be pressed on the surface of the pressing base.

4. The detection control device according to claim 2 or 3, wherein: The detection control circuit comprises: A digital switch module, wherein input terminals of the digital switch module are electrically connected to electrical lead-out terminals of the plurality of pressure sensors in a one-to-one correspondence, and select at least one of the pressure values ​​inputted by the plurality of pressure sensors; An analog-to-digital conversion module, which is connected to the output terminal of the digital switch module and converts the received pressure information into a digital voltage signal; A main controller receives the clock signal and processes and calculates the digital voltage signal, and sends out the warning signal when the digital voltage signal exceeds a preset threshold.

5. The detection control device according to claim 4, wherein: The detection control circuit also includes: A timing control module, which receives control instructions from the main controller and generates a clock signal, and outputs the clock signal to the digital switch module, the analog-to-digital conversion module and the main controller respectively; A power supply module, wherein the power supply module provides operating voltage to the timing control module and the main controller.

6. The detection control device according to claim 5, wherein: The detection control circuit also includes: A serial communication module is connected between the main controller and the host computer to transmit data between the main controller and the host computer. The host computer receives the warning signal and the start signal to control the start, stop and reset actions of the pressure head, and displays data of the received digital voltage signal.

7. The detection control device according to claim 5, wherein: The digital switch module is a complex programmable logic device.

8. The detection control device according to claim 6, wherein: If the digital voltage signals corresponding to the multiple pressure sensors are the same, the pressing surface of the pressing base is flat; if the digital voltage signals corresponding to the multiple pressure sensors are different and there is a digital voltage signal that exceeds the preset threshold, there is foreign matter on the pressing surface of the pressing base.

9. The detection control device according to claim 6, wherein: The digital switch module, the analog-to-digital conversion module, the main controller, the timing control module, the power supply module and the serial communication module are integrated on the same chip.

10. The detection control device according to claim 1, wherein: The spacings between the multiple pressure sensors are the same or gradually decrease from the center to the periphery.

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