PDLC liquid crystal detection device

Abstract

The utility model belongs to the field of detection, and particularly provides a PDLC liquid crystal detection device which comprises a main control module, an image acquisition module and a to-be-detected liquid crystal access module, the image acquisition module is configured to perform image information acquisition on to-be-detected liquid crystal in detection; the main control module is configured to complete detection of the liquid crystal to be detected according to comparison between the image information and preset image information. The main control module sends a corresponding stroke segment display instruction to the to-be-detected liquid crystal, the image acquisition module performs image acquisition on the PDLC liquid crystal, and the acquired image information is sent to the main control module for comparison, so that whether the to-be-detected liquid crystal continuously has defects such as holes, missing strokes and lap joint short circuit can be accurately judged; current and voltage detection parameters are collected by combining the to-be-detected liquid crystal access module, comprehensive testing of the to-be-detected liquid crystal is completed, misjudgment is reduced, and the automation degree of the whole detection process is high. And compared with manual visual inspection, the manual cost is reduced, and the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the detection field, in particular to a PDLC liquid crystal detection device. Background Art

[0002] Polymer Dispersed Liquid Crystal (PDLC) is in a translucent state when an electric field is applied, and needs to be observed against light to determine whether there are defects such as broken code.

[0003] In the related art, after lighting up the PDLC, a person manually observes the integrity of the liquid crystal segments and whether the displayed data matches the input signal. A voltmeter and current are used to detect whether the electrical parameters during operation meet the detection standards. Manual visual inspection can easily cause visual fatigue and may lead to false detection. During the detection, it is necessary to power on for a long time to observe the changes in current and voltage, which consumes a lot of man-hours.

[0004] How to quickly and conveniently perform automated detection of PDLC is currently an urgent issue to be solved. Utility Model Content

[0005] The utility model aims to provide a PDLC liquid crystal detection device.

[0006] In order to solve the above technical problems, the utility model provides a PDLC liquid crystal detection device, comprising:

[0007] Main control module, image acquisition module and LCD access module to be tested;

[0008] The image acquisition module and the liquid crystal access module to be tested are electrically connected to the main control module respectively;

[0009] The liquid crystal access module to be tested is suitable for accessing the liquid crystal to be tested;

[0010] The main control module is configured to send a detection instruction to the liquid crystal access module to be tested for detection;

[0011] The image acquisition module is configured to acquire image information of the liquid crystal to be detected and send it to the main control module;

[0012] The main control module is configured to complete the detection of the liquid crystal to be tested based on the comparison between the image information and the preset image information.

[0013] Furthermore, the image acquisition module includes:

[0014] Video acquisition circuit and fill light control circuit;

[0015] The main control module is electrically connected to the camera acquisition circuit;

[0016] The video acquisition circuit is electrically connected to the fill light control circuit.

[0017] Furthermore, the image acquisition module also includes an external memory unit;

[0018] The external memory unit is electrically connected to the main control module.

[0019] Furthermore, the liquid crystal access module to be tested includes:

[0020] A boost unit, a protection unit, a connector, a voltage detection unit, and a current detection unit;

[0021] The connector is electrically connected to the main control module and is suitable for being electrically connected to an external liquid crystal to be tested;

[0022] The boost unit is electrically connected to the protection unit;

[0023] The boost unit is suitable for boosting the power source VCC and supplying power to the connector through the protection unit;

[0024] The voltage detection unit and the current detection unit are electrically connected between the protection unit and the power supply end of the connector respectively.

[0025] Furthermore, the PDLC liquid crystal detection device also includes a key control module;

[0026] The button control module is electrically connected to the main control module.

[0027] Furthermore, the button control module includes:

[0028] A first button SW1, a second button SW2, a third button SW3 and a fourth button SW4;

[0029] The first button SW1 , the second button SW2 , the third button SW3 and the fourth button SW4 are connected in parallel, and one end is electrically connected to the signal input end corresponding to the main control module, and the other end is grounded.

[0030] Furthermore, the PDLC liquid crystal detection device also includes an alarm module;

[0031] The alarm module is electrically connected to the main control module;

[0032] The main control module is also configured to control the alarm module to sound an alarm when the received image information does not match the preset image information.

[0033] Furthermore, the PDLC liquid crystal detection device also includes a display module:

[0034] The display module is electrically connected to the main control module.

[0035] Furthermore, the PDLC liquid crystal detection device also includes a power supply module;

[0036] The power supply module is configured to supply power to other modules of the PDLC liquid crystal detection device.

[0037] Further, the power supply module includes: an input terminal DC_IN1, a switch S1, a fuse F1 and a power output terminal VCC connected in series in sequence;

[0038] The power output terminal VCC is grounded via a voltage stabilizing diode DZ1.

[0039] The beneficial effect of the utility model is that the utility model provides a PDLC liquid crystal detection device, including: a main control module, an image acquisition module and a liquid crystal access module to be tested; the image acquisition module and the liquid crystal access module to be tested are electrically connected to the main control module respectively; the liquid crystal access module to be tested is suitable for accessing the liquid crystal to be tested; the main control module is configured to send a detection instruction to the liquid crystal access module to be tested for detection; the image acquisition module is configured to collect image information of the liquid crystal to be tested during detection, and send it to the main control module; the main control module is configured to complete the detection of the liquid crystal to be tested based on the comparison of the image information with the preset image information. The main control module sends the corresponding pen segment display instruction to the liquid crystal to be tested, and collects the image of the PDLC liquid crystal through the image acquisition module, and sends the collected image information to the main control module for comparison, which can accurately determine whether the liquid crystal to be tested has defects such as holes, missing strokes, overlapping short circuits, etc., and combines the liquid crystal access module to collect current and voltage detection parameters to complete the comprehensive test of the liquid crystal to be tested, reduce misjudgment, and have a high degree of automation for the entire detection process. Compared with manual visual inspection, it reduces labor costs and improves detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0041] Figure 1 This is a principle block diagram of the PDLC liquid crystal detection device provided by the embodiment of the utility model.

[0042] Figure 2 It is a circuit diagram of the video acquisition circuit provided by the embodiment of the utility model.

[0043] Figure 3 It is a circuit diagram of a fill light control circuit provided by an embodiment of the utility model.

[0044] Figure 4 It is a circuit diagram of an external memory unit provided by an embodiment of the utility model.

[0045] Figure 5 It is a circuit diagram of a boost unit and a protection unit provided in an embodiment of the utility model.

[0046] Figure 6 It is a circuit diagram of a connector, a voltage detection unit, and a current detection unit provided in an embodiment of the utility model.

[0047] Figure 7 It is a circuit diagram of a key control module provided in an embodiment of the utility model.

[0048] Figure 8 It is a circuit diagram of the alarm module provided by the embodiment of the utility model.

[0049] Fig. 9 It is a circuit diagram of a display module provided by an embodiment of the utility model.

[0050] Fig.10 It is a circuit diagram of the power supply module provided in the embodiment of the utility model. DETAILED DESCRIPTION

[0051] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0052] For examples, see Figure 1 , this embodiment provides a PDLC liquid crystal detection device, including: a main control module, an image acquisition module and a liquid crystal access module to be tested; the image acquisition module and the liquid crystal access module to be tested are electrically connected to the main control module respectively; the liquid crystal access module to be tested is suitable for accessing the liquid crystal to be tested; the main control module is configured to send a detection instruction to the liquid crystal access module to be tested for detection; the image acquisition module is configured to collect image information of the liquid crystal to be tested during detection and send it to the main control module; the main control module is configured to complete the detection of the liquid crystal to be tested based on the comparison of the image information with the preset image information. The main control module sends the corresponding pen segment display instruction to the liquid crystal to be tested, and collects the image of the PDLC liquid crystal through the image acquisition module, and sends the collected image information to the main control module for comparison, which can accurately determine whether the liquid crystal to be tested has defects such as holes, missing strokes, overlapping short circuits, etc., and collects the current and voltage detection parameters in combination with the liquid crystal access module to be tested, completes the comprehensive test of the liquid crystal to be tested, reduces misjudgment, and has a high degree of automation for the entire detection process. Compared with manual visual inspection, it reduces the labor cost and improves the detection accuracy.

[0053] In this embodiment, the image acquisition module includes: a video acquisition circuit and a fill light control circuit; the main control module is electrically connected to the video acquisition circuit; and the video acquisition circuit is electrically connected to the fill light control circuit.

[0054] Camera acquisition circuit Figure 2 As shown in FIG. 1 , OV1 is a camera. The fill light control circuit is shown in FIG. Figure 3 As shown, LED2, LED3 and LED4 are all fill lights, which are turned on and off by transistor Q2. Specifically, when fill light is needed, the main control module outputs instructions to OV1 through the IIC bus DCMI_SDA and DCMI_SCL to control the level of the STROBE pin of OV1, thereby controlling the opening and closing of the transistor Q2, so that LED2, LED3, and LED4 are turned on or off. Among them, resistors R4, R5, and R6 are used to limit current to ensure that LED2, LED3, and LED4 will not be burned by large current.

[0055] In this embodiment, the image acquisition module further includes an external memory unit; the external memory unit is electrically connected to the main control module. Figure 4 As shown, since the memory of the main control module is limited, the present application temporarily stores the image information by adding an external memory chip U6, thereby reducing the demand for the memory of the main control module and further reducing the hardware circuit cost.

[0056] The circuit of the liquid crystal access module to be tested is described below. In the present embodiment, the liquid crystal access module to be tested includes: a boost unit, a protection unit, a connector, a voltage detection unit and a current detection unit; the connector is electrically connected to the main control module and is suitable for being electrically connected to the external liquid crystal to be tested; the boost unit is electrically connected to the protection unit; the boost unit is suitable for boosting the power supply VCC and supplying power to the connector through the protection unit; the voltage detection unit and the current detection unit are electrically connected between the protection unit and the power supply end of the connector, respectively.

[0057] Among them, the circuit diagram of the boost unit and the protection unit is as follows Figure 5 The circuit diagram of the connector, voltage detection unit and current detection unit is shown in Figure 6 As shown, the liquid crystal to be tested is electrically connected to the connector LCD1, thereby completing the access of the liquid crystal to be tested.

[0058] In this embodiment, the PDLC liquid crystal detection device further includes a key control module; the key control module is electrically connected to the main control module.

[0059] The button control module includes: a first button SW1, a second button SW2, a third button SW3 and a fourth button SW4; the first button SW1, the second button SW2, the third button SW3 and the fourth button SW4 are connected in parallel, and one end is electrically connected to the signal input end corresponding to the main control module, and the other end is grounded. The circuit diagram of the button control module is shown in FIG. Figure 7 shown.

[0060] The first button SW1 is configured to start the test, which can be triggered only after the liquid crystal to be tested is connected to the connector LCD1.

[0061] The second button SW2 is configured to perform fill light. The fill light starts when the second button SW2 is triggered once, and the fill light goes out when the second button SW2 is pressed again.

[0062] The third button SW3 is configured to release the alarm of the alarm module. Specifically, pressing the third button SW3 temporarily releases the alarm prompt so as to record the fault point.

[0063] The fourth button SW4 is configured to end the test. Specifically, when the fourth button SW4 is triggered, a stop test instruction is sent to the main control module, and the main control module stops detecting.

[0064] In this embodiment, the PDLC liquid crystal detection device also includes an alarm module; the alarm module is electrically connected to the main control module; the main control module is also configured to control the alarm module to sound an alarm when the received image information does not match the preset image information.

[0065] Among them, the circuit diagram of the alarm module is as follows Figure 8 As shown. One end of the buzzer BEEP1 is connected to the high level VCC, and the other end is grounded to GND through the transistor Q1; the control end BEEP of the control module is electrically connected to the base of the transistor Q1 through the resistor R2; one end of the resistor R3 is grounded to GND, and the other end is electrically connected between the resistor R2 and the base of the transistor Q1. When the image information received by the main control module does not match the preset image information, or the current value and voltage value detected by the voltage detection unit and the current detection unit do not match the preset, the buzzer BEEP1 is controlled to alarm.

[0066] In order to facilitate display of the test results, in this embodiment, the PDLC liquid crystal detection device further includes a display module: the display module is electrically connected to the main control module. The display module displays the test results and operating status for easy observation by test personnel.

[0067] Among them, the circuit diagram of the display module is as follows Fig. 9 shown.

[0068] In this embodiment, the PDLC liquid crystal detection device further includes a power supply module; the power supply module is configured to supply power to other modules of the PDLC liquid crystal detection device.

[0069] Specifically, the circuit diagram of the power supply module is as follows Fig.10 shown.

[0070] The power supply module includes: an input terminal DC_IN1, a switch S1, a fuse F1 and a power output terminal VCC connected in series in sequence; the power output terminal VCC is grounded via a voltage stabilizing diode DZ1.

[0071] In summary, the utility model provides a PDLC liquid crystal detection device, including: a main control module, an image acquisition module and a liquid crystal access module to be tested; the image acquisition module and the liquid crystal access module to be tested are electrically connected to the main control module respectively; the liquid crystal access module to be tested is suitable for accessing the liquid crystal to be tested; the main control module is configured to send a detection instruction to the liquid crystal access module to be tested for detection; the image acquisition module is configured to collect image information of the liquid crystal to be tested during detection, and send it to the main control module; the main control module is configured to complete the detection of the liquid crystal to be tested based on the comparison of the image information with the preset image information. The main control module sends the corresponding pen segment display instruction to the liquid crystal to be tested, and collects the image of the PDLC liquid crystal through the image acquisition module, and sends the collected image information to the main control module for comparison, which can accurately determine whether the liquid crystal to be tested has defects such as holes, missing strokes, overlapping short circuits, etc., and combines the liquid crystal access module to collect current and voltage detection parameters, completes the comprehensive test of the liquid crystal to be tested, reduces misjudgment, and has a high degree of automation for the entire detection process. Compared with manual visual inspection, it reduces the cost of labor and improves the detection accuracy.

[0072] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.

[0073] The terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0074] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0075] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0076] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0077] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A PDLC liquid crystal detection device, characterized in that: include: Main control module, image acquisition module and LCD access module to be tested; The image acquisition module and the liquid crystal access module to be tested are electrically connected to the main control module respectively; The liquid crystal access module to be tested is suitable for accessing the liquid crystal to be tested; The main control module is configured to send a detection instruction to the liquid crystal access module to be tested for detection; The image acquisition module is configured to acquire image information of the liquid crystal to be detected and send it to the main control module; The main control module is configured to complete the detection of the liquid crystal to be tested according to the comparison between the image information and the preset image information; The liquid crystal access module to be tested comprises: A boost unit, a protection unit, a connector, a voltage detection unit, and a current detection unit; The connector is electrically connected to the main control module and is suitable for being electrically connected to an external liquid crystal to be tested; The boost unit is electrically connected to the protection unit; The boost unit is suitable for boosting the power source VCC and supplying power to the connector through the protection unit; The voltage detection unit and the current detection unit are electrically connected between the protection unit and the power supply end of the connector respectively.

2. The PDLC liquid crystal detection device according to claim 1, characterized in that: The image acquisition module comprises: Video acquisition circuit and fill light control circuit; The main control module is electrically connected to the camera acquisition circuit; The video acquisition circuit is electrically connected to the fill light control circuit.

3. The PDLC liquid crystal detection device according to claim 2, characterized in that: The image acquisition module also includes an external memory unit; The external memory unit is electrically connected to the main control module.

4. The PDLC liquid crystal detection device according to claim 1, characterized in that: The PDLC liquid crystal detection device also includes a key control module; The button control module is electrically connected to the main control module.

5. The PDLC liquid crystal detection device according to claim 4, characterized in that: The button control module comprises: A first button SW1, a second button SW2, a third button SW3 and a fourth button SW4; The first button SW1 , the second button SW2 , the third button SW3 and the fourth button SW4 are connected in parallel, and one end is electrically connected to the signal input end corresponding to the main control module, and the other end is grounded.

6. The PDLC liquid crystal detection device according to claim 1, characterized in that: The PDLC liquid crystal detection device also includes an alarm module; The alarm module is electrically connected to the main control module; The main control module is also configured to control the alarm module to sound an alarm when the received image information does not match the preset image information.

7. The PDLC liquid crystal detection device according to claim 1, characterized in that: The PDLC liquid crystal detection device also includes a display module: The display module is electrically connected to the main control module.

8. The PDLC liquid crystal detection device according to claim 1, characterized in that: The PDLC liquid crystal detection device also includes a power supply module; The power supply module is configured to supply power to other modules of the PDLC liquid crystal detection device.

9. The PDLC liquid crystal detection device according to claim 8, characterized in that: The power supply module comprises: an input terminal DC_IN1, a switch S1, a fuse F1 and a power output terminal VCC connected in series in sequence; The power output terminal VCC is grounded via a voltage stabilizing diode DZ1.

Images