Light-up test device based on LED display screen

Abstract

The utility model provides a lighting test device based on an LED display screen, which comprises a substrate, a key module arranged on the substrate, a receiving card and a test interface capable of being in driving connection with a driving interface of an LED lamp panel to be tested, the receiving card comprises a field programmable logic gate array and a single chip microcomputer, the field programmable logic gate array is connected with the test interface, and the single chip microcomputer is connected with the key module. The single-chip microcomputer is in communication connection with the field programmable logic gate array, and the single-chip microcomputer is also in communication connection with the key module; the key module comprises a color test function key, a gray scale test function key and a scanning test function key which are connected to corresponding function pins of the single-chip microcomputer in a one-to-one correspondence mode. According to the lighting test device based on the LED display screen, a plurality of function keys are separately arranged, the function keys can be randomly selected and directly switched among corresponding test items, the operation is convenient, the test efficiency of troubleshooting, leak detection and reinspection can be effectively improved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of display screen testing technology, and in particular to a lighting test device based on an LED display screen. Background Technology

[0002] To ensure the reliability of the display function of LED (light emitting diode) displays before they leave the factory, it is necessary to conduct a lighting test on the LED displays to test whether their functions are normal under various usage conditions.

[0003] In existing technologies, a self-test button is typically brought out through a receiving card. Repeatedly triggering the self-test button allows for cyclic switching between preset test items. The receiving card controls the LED display to cycle between preset display images such as red, green, blue, white, and diagonal scan.

[0004] However, this traditional button switching method can only cycle in one direction. For example, after switching from the red screen to the diagonal scan display, to return to the red screen, the button must be pressed multiple times in a fixed order to complete a full switching cycle. When a certain item needs to be retested to troubleshoot a problem, it is necessary to enter the loop and switch to the corresponding item one by one before it can be selected. This process consumes a lot of time, seriously reduces the work efficiency of the production line, and is prone to multiple button triggers, resulting in missed detections. When a missed detection occurs, it is necessary to re-enter the loop for re-inspection, resulting in low testing efficiency. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a lighting test device based on an LED display screen, which solves the problems of low production efficiency caused by the inability of existing lighting test devices to flexibly select test items, the inconvenience of troubleshooting and re-inspection, and the resulting low production efficiency.

[0006] This utility model provides a lighting test device based on an LED display screen for testing the lighting of LED light boards. The device includes: a substrate, a button module and a receiving card disposed on the substrate, and a test interface capable of being driven and connected to the driving interface of the LED light board under test.

[0007] The receiving card includes a field-programmable gate array (FPGA) and a microcontroller. The FPGA is connected to the test interface, the microcontroller is communicatively connected to the FPGA, and the microcontroller is also communicatively connected to the button module.

[0008] The button module includes color test function buttons, grayscale test function buttons, and scan test function buttons, and each button is connected to the corresponding function pin of the microcontroller.

[0009] Optionally, a shaping circuit and an amplification circuit are connected in series between the button module and the microcontroller.

[0010] Optionally, the buttons in the button module include micro-switches.

[0011] Optionally, the color test function buttons include a red function button, a green function button, a blue function button, and a white function button.

[0012] Optionally, the grayscale test function buttons include at least two grayscale function buttons with different grayscale levels.

[0013] Optionally, the scanning test function buttons include a horizontal scan function button, a vertical scan function button, a left diagonal function button, and a right diagonal function button.

[0014] Optionally, the buttons in the button module are arranged in a single column with intervals.

[0015] Optionally, the functional pins of the microcontroller, which are connected one-to-one with each button of the button module, are also connected to a hot-swappable interface, and are connected one-to-one with each button of the button module through the hot-swappable interface.

[0016] Optionally, the button module includes a hot-swappable socket, and each button of the button module is plugged into the corresponding position of the hot-swappable socket.

[0017] This utility model provides an LED display screen-based lighting test device, comprising: a substrate, a button module and a receiving card mounted on the substrate, and a test interface that can be driven and connected to the driving interface of the LED light board under test. The receiving card includes a field-programmable gate array (FPGA) and a microcontroller. The FPGA is connected to the test interface, and the microcontroller is communicatively connected to both the FPGA and the button module. The button module includes color test function buttons, grayscale test function buttons, and scan test function buttons, each connected to a corresponding function pin of the microcontroller. During testing, triggering a function button on the button module allows the microcontroller to identify the corresponding function signal and control the FPGA to drive the LED light board under test according to a predetermined driver program corresponding to that function button. The lighting status of the LED light board under test is then used to determine whether the function of the current test item is normal. This utility model provides an LED display screen-based lighting test device with multiple function buttons, allowing for arbitrary selection and direct switching between corresponding test items. This convenient operation effectively improves the efficiency of troubleshooting, re-inspection, and ultimately, production efficiency. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the main structure of the LED display screen-based lighting test device in this embodiment of the present invention.

[0019] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0021] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] To address the problems of inflexible test item selection, inconvenient troubleshooting and retesting in existing LED lighting testing devices, leading to low production efficiency, this invention provides an LED display lighting testing device. The device includes: a substrate, a button module and a receiving card mounted on the substrate, and a test interface that can be driven and connected to the driver interface of the LED light board under test. The receiving card includes a field-programmable gate array (FPGA) and a microcontroller. The FPGA is connected to the test interface, and the microcontroller is communicatively connected to both the FPGA and the button module. The button module includes color test, grayscale test, and scan test function buttons, each connected to a corresponding function pin of the microcontroller. The microcontroller can distinguish and identify the function signals provided when each button is triggered, and then control the FPGA to drive the LED light board under test according to the corresponding preset driver program, enabling the LED light board to operate in the corresponding functional state. The separate function buttons allow for flexible switching of test items, avoiding the limitations of cyclical operations. This effectively improves the testing efficiency for troubleshooting and retesting missed issues, thereby increasing production efficiency.

[0024] Specifically, such as Figure 1 The diagram shows the main structure of the LED display screen-based lighting test device in this embodiment of the present invention. The test interface 101, the button module 110, and the receiver card 200 are all fixedly mounted on the substrate 100. The receiver card 200 includes a field-programmable gate array (FPGA) and a microcontroller (MCU), which are used to provide corresponding drive signal outputs according to the input function signals. The drive signals are provided to the lamp board 300 through the test interface 101 and the corresponding communication cable, driving the lamp board 300 to work in the corresponding function mode.

[0025] Corresponding to color testing, grayscale testing, and scanning testing, the button module 110 includes a color testing function button, a grayscale testing function button, and a scanning testing function button.

[0026] To improve the reliability of the functional signals provided by the button module 110 to the microcontroller MCU, in this embodiment, a shaping circuit 120 and an amplifier circuit 130 are connected in series between the button module 110 and the microcontroller MCU.

[0027] The shaping circuit 120 is used to convert the key signal into a standard signal. For example, it can be selected to use a monostable trigger such as a 555 timer or a 74HC123 chip to generate a fixed-width output pulse, or it can be implemented by combining an RC low-pass filter circuit and a Schmitt trigger. The specific configuration of the shaping circuit 120 can be selected according to specific needs, and this application does not make any special restrictions on it.

[0028] To facilitate triggering, the buttons 111 in the button module 110 include micro switches, which have a long service life, small size, and are easy to arrange.

[0029] Based on the separate arrangement of function buttons for color testing, grayscale testing, and scanning testing, each of the color testing function button, grayscale testing function button, and scanning testing function button can also be selected as a cyclic trigger button.

[0030] In this embodiment, to further improve the flexibility and controllability between various test items, the color test function buttons include a red function button, a green function button, a blue function button, and a white function button.

[0031] The grayscale test function buttons include at least two grayscale function buttons with different grayscale levels. For example, if the grayscale of the LED light board under test is 0-255, two grayscale levels, 70 and 255, can be set, or three grayscale levels, 50, 100 and 255, can be set. In practice, the number of grayscale function buttons corresponding to the grayscale levels can be selected according to the specific grayscale level of the LED light board under test and the test requirements.

[0032] The scanning test function buttons include horizontal scan, vertical scan, left diagonal scan, and right diagonal scan function buttons, which are used for functional testing of horizontal scan, vertical scan, left diagonal scan, and right diagonal scan, respectively.

[0033] For ease of operation, in this embodiment, each button 111 in the button module 110 is arranged in a single column with intervals. Compared with a multi-column array, the single-column arrangement can reduce the number of buttons near a single button, reduce the probability of accidentally triggering adjacent buttons, and ensure testing efficiency.

[0034] To facilitate equipment maintenance, in this embodiment, the functional pins of the microcontroller MCU, which are connected one-to-one with each button 111 of the button module 110, are also connected to a hot-swappable interface. The microcontroller MCU on the receiver card 200 can be pre-connected to the hot-swappable interface (which can be connected to other components via an interface bus). When testing is required, it can be connected one-to-one with each button 111 of the button module 110 via the hot-swappable interface. This allows for easy replacement of hardware in case of hardware failure in the communication path.

[0035] Furthermore, the button module 110 includes a hot-swappable socket, and each button 111 of the button module 110 is plugged into the corresponding position of the hot-swappable socket, so that the button 111 can be flexibly replaced by hot-swapping operation when it malfunctions.

[0036] The shaping circuit 120 and the amplification circuit 130 can be equipped with modular chips, with corresponding circuits arranged on the substrate 100 and hot-swappable interfaces provided. The modular chips can be plugged into the circuits, which facilitates the replacement of hardware faults in the shaping circuit 120 and the amplification circuit 130 and reduces maintenance costs.

[0037] The receiver card 200 is generally a complete module. It can be connected to the base plate 100 by setting mounting holes and fixing it with screws. The receiver card 200 is connected to the test interface 101 through an interface bus.

[0038] The LED display-based lighting test device provided by this utility model includes a substrate, a button module and a receiving card disposed on the substrate, and a test interface that can be driven and connected to the driving interface of the LED light board under test. The receiving card includes a field-programmable gate array (FPGA) and a microcontroller. The FPGA is connected to the test interface, and the microcontroller is communicatively connected to the FPGA and also to the button module. The button module includes color test function buttons, grayscale test function buttons, and scan test function buttons, each correspondingly connected to the corresponding function pin of the microcontroller. Multiple function buttons are separately configured, allowing for arbitrary selection and direct switching between corresponding test items. This convenient operation effectively improves the testing efficiency for troubleshooting and re-inspection, thereby increasing production efficiency.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A lighting test device based on an LED display screen, used for lighting tests of LED light boards, characterized in that, The LED display-based lighting test device includes: a substrate, a button module and a receiving card disposed on the substrate, and a test interface that can be driven and connected to the driving interface of the LED light board under test, wherein... The receiving card includes a field-programmable gate array (FPGA) and a microcontroller. The FPGA is connected to the test interface, the microcontroller is communicatively connected to the FPGA, and the microcontroller is also communicatively connected to the button module. The button module includes color test function buttons, grayscale test function buttons, and scan test function buttons, and each button is connected to the corresponding function pin of the microcontroller.

2. The LED display screen-based lighting test device according to claim 1, characterized in that, A shaping circuit and an amplification circuit are connected in series between the button module and the microcontroller.

3. The LED display screen-based lighting test device according to claim 1 or 2, characterized in that, The buttons in the button module include micro-switches.

4. The LED display screen-based lighting test device according to claim 1, characterized in that, The color test function buttons include a red function button, a green function button, a blue function button, and a white function button.

5. The LED display screen-based lighting test device according to claim 1, characterized in that, The grayscale test function buttons include at least two grayscale function buttons with different grayscale levels.

6. The LED display screen-based lighting test device according to claim 1, characterized in that, The scanning test function buttons include a horizontal scan function button, a vertical scan function button, a left diagonal function button, and a right diagonal function button.

7. The LED display screen-based lighting test device according to claim 1, characterized in that, The buttons in the button module are arranged in a single column with intervals.

8. The LED display screen-based lighting test device according to claim 1, characterized in that, The microcontroller's functional pins, which correspond one-to-one with each button of the button module, are also connected to a hot-swappable interface, and are connected one-to-one with each button of the button module through the hot-swappable interface.

9. The LED display screen-based lighting test device according to claim 1, characterized in that, The button module includes a hot-swappable socket, and each button of the button module is plugged into the corresponding position of the hot-swappable socket.

Images