Detection device for detecting signal processing function of display mainboard

Abstract

The utility model relates to a detection device for detecting a signal processing function of a display mainboard. The detection device comprises a control device, a signal conversion device, the display mainboard, a first automatic plugging mechanism, a second automatic plugging mechanism and a signal restoration device, the control device is connected with the signal conversion device, the first automatic plugging mechanism and the second automatic plugging mechanism through a control bus; the control device is connected with the signal conversion device through an HDMI signal line; an HDMI signal line, a VGA signal line, a DVI signal line and a DP signal line which are controlled to be turned off through a first automatic plugging mechanism are connected between the signal conversion device and the display mainboard. The control device is connected with the signal restoration device through a PCIE (Peripheral Component Interface Express) bus; and a screen line which is controlled to be turned off through a second automatic plugging mechanism is connected between the display mainboard and the signal restoring device. According to the utility model, the dependence on various display screens is reduced, and the test cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of screen display technology, and in particular relates to a detection device for detecting the signal processing function of a display motherboard. Background Technology

[0002] In the monitor manufacturing industry, the signal processing function of the monitor motherboard is one of its core performance indicators, directly affecting key characteristics such as image quality, color reproduction, and compatibility. Therefore, it is crucial to conduct comprehensive and accurate testing of the motherboard's signal processing function before the monitor leaves the factory.

[0003] In traditional testing methods, testers need to manually plug and unplug various signal cables (such as HDMI, VGA, DP, etc.) to test the display motherboard's response to different input signals. This not only increases the complexity of the operation but also easily leads to missed detections or misjudgments due to human error. Furthermore, since different monitor motherboards support different display models and resolutions, multiple display models need to be prepared to match different testing requirements. This not only increases testing costs but also reduces testing efficiency. In addition, traditional testing methods typically can only test each signal channel one by one, and cannot test multiple channels simultaneously, further extending the testing time. Utility Model Content

[0004] To address the problems existing in the background art, this utility model provides a detection device for detecting the signal processing function of a display motherboard, comprising:

[0005] Control device, signal conversion device, display motherboard, first automatic plug-in / plug-out mechanism, second automatic plug-in / plug-out mechanism, and signal restoration device;

[0006] The control device is connected to the signal conversion device, the first automatic plugging and unplugging mechanism, and the second automatic plugging and unplugging mechanism via a control bus.

[0007] The control device is connected to the signal conversion device via an HDMI signal cable;

[0008] The signal conversion device and the display motherboard are connected by HDMI signal lines, VGA signal lines, DVI signal lines and DP signal lines that are controlled to be turned off by a first automatic plugging and unplugging mechanism.

[0009] The control device is connected to the signal restoration device via a PCIe bus;

[0010] The display motherboard and the signal restoration device are connected by a screen cable that is controlled to be turned off by a second automatic plugging and unplugging mechanism.

[0011] This utility model has at least the following beneficial effects.

[0012] This invention, by introducing automation and signal processing technologies, achieves comprehensive, accurate, and efficient testing of the signal processing functions of the display motherboard. Through first and second automatic plug-in / plug-out mechanisms, it automates the plugging and unplugging of signal cables and screen cables, reducing the complexity and workload of manual operation. Simultaneously, precise control of the entire testing process by the control device improves testing efficiency and accuracy. A signal conversion device converts the single signal output by the control device into multiple input signals to adapt to the input requirements of different display motherboards. Furthermore, a signal restoration device restores the screen signal output by the display motherboard into a recognizable signal for subsequent analysis and judgment. This reduces reliance on multiple display screens and lowers testing costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of an embodiment of the present invention. Detailed Implementation

[0015] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0016] Please see Figure 1 and Figure 2 This utility model provides a detection device for detecting the signal processing function of a display motherboard, comprising:

[0017] Control device, signal conversion device, display motherboard, first automatic plug-in / plug-out mechanism, second automatic plug-in / plug-out mechanism, and signal restoration device;

[0018] The control device is connected to the signal conversion device, the first automatic plugging and unplugging mechanism, and the second automatic plugging and unplugging mechanism via a control bus.

[0019] The control device is connected to the signal conversion device via an HDMI signal cable;

[0020] The signal conversion device and the display motherboard are connected by HDMI signal lines, VGA signal lines, DVI signal lines and DP signal lines that are controlled to be turned off by a first automatic plugging and unplugging mechanism.

[0021] The control device is connected to the signal restoration device via a PCIe bus;

[0022] The display motherboard and the signal restoration device are connected by a screen cable that is controlled to be turned off by a second automatic plugging and unplugging mechanism.

[0023] In this embodiment, the control device serves as the core of the entire testing system, responsible for sending commands and coordinating the operation of each component. Through a control bus, the control device communicates with the signal conversion device, the first automatic plug-in / plug-out mechanism, and the second automatic plug-in / plug-out mechanism for data communication and command transmission. The control device is also connected to the signal conversion device via an HDMI signal cable, providing the raw test signal. The signal conversion device receives the HDMI signal from the control device and converts it into various display signal formats (such as HDMI, VGA, DVI, DP, etc.) to adapt to the input requirements of different display motherboards. These converted signals are connected to the display motherboard through the first automatic plug-in / plug-out mechanism, enabling automatic signal access and disconnection. The display motherboard is the core component under test, responsible for processing the input signals and generating corresponding display outputs. During the testing process, the display motherboard receives and processes various format signals from the signal conversion device. The first automatic plug-in / plug-out mechanism controls the automatic plugging and unplugging of the HDMI, VGA, DVI, and DP signal cables. Based on the commands of the control device, the first automatic plug-in / plug-out mechanism can quickly and accurately complete the connection and disconnection of the signal cables, thereby achieving automatic switching between different signal formats. The second automatic plug-in / plug-out mechanism controls the screen cable connection between the display motherboard and the signal restoration device. During the testing process, the second automatic plug-in / plug-out mechanism automatically connects or disconnects the screen cable according to instructions to collect and analyze the output signals of the display motherboard. The signal restoration device receives the screen signals from the display motherboard and restores them to a recognizable signal format. Connected to the control device via the PCIe bus, the signal restoration device transmits the restored signal to the control device for further analysis and judgment.

[0024] Preferably, the detection device further includes: a power supply and a third automatic plug-in / plug-out mechanism; the third automatic plug-in / plug-out mechanism is connected to the control device via a control bus; a power line that is controlled to be turned off by the third automatic plug-in / plug-out mechanism is connected between the power supply and the display motherboard.

[0025] In this embodiment, a power supply and a third automatic plug-in mechanism are further introduced on the basis of the original detection device to enhance the functionality and automation of the detection device; the power supply is connected to the display motherboard through the third automatic plug-in mechanism to realize the automatic connection and disconnection of the power supply.

[0026] Preferably, the first automatic plug-in / plug-out mechanism includes a floating DC power connector; the second automatic plug-in / plug-out mechanism includes floating HDMI, VGA, DVI, and DP connectors; and the third automatic plug-in / plug-out mechanism includes a floating FPC screen cable connector.

[0027] In this embodiment, the first automatic plug-in / plug-out mechanism is mainly responsible for controlling the automatic plugging and unplugging of HDMI, VGA, DVI, and DP signal cables. To achieve this function, the mechanism uses a floating DC power connector as its core component. This floating connector has good conductivity and plug-in / unplug stability, ensuring accurate connection and signal transmission of the signal cables during plugging and unplugging. The second automatic plug-in / plug-out mechanism is mainly responsible for controlling the screen cable connection between the display motherboard and the signal restoration device. To achieve this function, the mechanism uses HDMI, VGA, DVI, and DP floating connectors as its core component. These floating connectors can adapt to different screen cable interface specifications, ensuring accurate connection and signal transmission of the screen cable during plugging and unplugging. The third automatic plug-in / plug-out mechanism is mainly responsible for controlling the connection and disconnection between the power cable and the display motherboard. To achieve this function, the mechanism uses an FPC screen cable floating connector as its core component. This floating connector has good conductivity and plug-in / unplug stability, ensuring accurate connection and power supply of the power cable during plugging and unplugging.

[0028] Preferably, the control device includes an industrial computer, a microcontroller, or a PC.

[0029] Preferably, the signal restoration device includes: a signal restoration board, an LVDS conversion board, and an eDP conversion board; the display motherboard is connected to the signal restoration board, the LVDS conversion board, and the eDP conversion board respectively via a screen cable controlled to be turned off by a second automatic plug-in mechanism; the LVDS conversion board is connected to the signal restoration board via a screen cable; the eDP conversion board is connected to the signal restoration board via a screen cable.

[0030] Preferably, the LVDS conversion board is used to convert the low-voltage differential LVDS screen signal into a high-speed serial V-by-One signal; the eDP conversion board is used to convert the all-digital eDP screen signal into a high-speed serial V-by-One signal; and the signal restoration board is used to convert the high-speed serial V-by-One signal into a format suitable for the display panel and transmit it to the control device via the PCIe bus.

[0031] In this embodiment, the main function of the LVDS conversion board (such as the NT72333TBG or THCV226 chip) is to convert low-voltage differential signaling (LVDS) screen signals into high-speed serial V-by-One signals. LVDS is a signal transmission technology widely used in video devices such as LCD displays. It uses differential signal transmission and has advantages such as high speed, low power consumption, and anti-interference. V-by-One, on the other hand, is a highly efficient high-speed serial signal transmission standard. It can add clock signals to data, eliminating the need for a dedicated clock signal and avoiding offset issues, making it ideal for high-speed, long-distance transmission. When the display motherboard outputs LVDS format screen signals, the LVDS conversion board can convert them into V-by-One signals for subsequent signal processing and transmission.

[0032] eDP conversion cards (such as the THCA2480 series from THine Electronics) are responsible for converting all-digital eDP (Embedded DisplayPort) screen signals into high-speed serial V-by-One signals. eDP is a high-performance display interface standard that provides high-bandwidth and low-power display data transmission capabilities. Through eDP conversion cards, eDP format screen signals can be converted into V-by-One signals to adapt to different display devices and transmission requirements. When the display motherboard outputs eDP format screen signals, the eDP conversion card can convert them into V-by-One signals for subsequent signal processing and transmission. Signal restoration cards (such as the THCA series from THine Electronics) primarily convert high-speed serial V-by-One signals into a format suitable for the display panel and transmit them to the control device via the PCIe (Peripheral Component Interconnect Express) bus. PCIe is a high-speed serial computer expansion bus standard that provides high-bandwidth and low-latency data transmission capabilities. The signal restoration board utilizes the advantages of the PCIe bus to convert V-by-One signals into a format suitable for the display panel and transmit them to the control device for further processing or display. Regardless of whether the display motherboard outputs LVDS or eDP format screen signals, they can be converted to V-by-One signals by the corresponding conversion board, and then the signal restoration board converts them into a format suitable for the display panel and transmits them to the control device via the PCIe bus.

[0033] The signal restoration device, through the coordinated operation of LVDS conversion board, eDP conversion board, and signal restoration board, achieves flexible processing and efficient transmission of signals output from the display motherboard. This design not only improves the flexibility and accuracy of signal processing but also reduces system complexity and cost.

[0034] Preferably, the signal conversion device includes: a signal switcher, a first signal converter, a second signal converter, and a third signal converter; the signal switcher is connected to a control device via an HDMI signal cable; the signal switcher is connected to the first signal converter, the second signal converter, and the third signal converter respectively via HDMI signal cables; the signal switcher is connected to the display motherboard via an HDMI signal cable controlled to be turned off by a first automatic plug-in mechanism; the first signal converter is connected to the display motherboard via a VGA signal cable controlled to be turned off by a first automatic plug-in mechanism; the second signal converter is connected to the display motherboard via a DVI signal cable controlled to be turned off by a first automatic plug-in mechanism; the third signal converter is connected to the display motherboard via a DP signal cable controlled to be turned off by a first automatic plug-in mechanism; the first signal converter, the second signal converter, and the third signal converter are connected to the control device via a control bus.

[0035] Preferably, the signal switcher is used to distribute one HDMI signal input from the control device to multiple HDMI output ports.

[0036] Preferably, the system comprises a first signal converter, a second signal converter, and a third signal converter; the first signal converter is used to convert HDMI signals to VGA signals, the second signal converter is used to convert HDMI signals to DVI signals, and the third signal converter is used to convert HDMI signals to DP signals.

[0037] In this embodiment, the main function of the signal switcher is to distribute a single HDMI signal input from the control device to multiple HDMI output ports. This means that regardless of the content or format of the video signal sent by the control device, the signal switcher can copy it and send it simultaneously to multiple output ports for subsequent signal processing or display. The first signal converter is responsible for converting the HDMI signal to a VGA signal. It receives the HDMI signal from the signal switcher and converts it to a VGA signal through its internal conversion circuit. The second signal converter is responsible for converting the HDMI signal to a DVI signal. Similar to the first signal converter, it receives the HDMI signal from the signal switcher and converts it to a DVI signal through its internal conversion circuit. The third signal converter is responsible for converting the HDMI signal to a DP (DisplayPort) signal. It also receives the HDMI signal from the signal switcher and converts it to a DP signal through its internal conversion circuit. The first, second, and third signal converters are also connected to the control device via a control bus. This bus is used to transmit control commands and status information, enabling the control device to monitor and control the operating status of these converters in real time. The first signal converter is HDMI to VGA, the second is HDMI to DVI, and the third is HDMI to DP.

[0038] One way to use this utility model:

[0039] First, the control device controls the power supply to the display motherboard by controlling the third automatic plugging and unplugging mechanism, thus powering on the display motherboard.

[0040] Secondly, the control device transmits the signal under test to the signal switcher via the HDMI signal cable. The signal switcher distributes the single HDMI signal input from the control device to multiple HDMI output ports. The first signal converter receives the HDMI signal from the signal switcher and converts it to a VGA signal using its internal conversion circuit. The second signal converter receives the HDMI signal from the signal switcher and converts it to a DVI signal using its internal conversion circuit. The third signal converter receives the HDMI signal from the signal switcher and converts it to a DP (DisplayPort) signal using its internal conversion circuit. The control device controls the first automatic plugging / unplugging mechanism to connect or disconnect the HDMI, VGA, DVI, and DP signal cables connected between the signal converter and the display motherboard. The display motherboard converts the input HDMI, VGA, DVI, or DP signal... To display the motherboard's output signal, given the known type of the motherboard's output signal, the control device controls the second automatic plug-in mechanism to connect or disconnect the corresponding signal restoration path. For example, if the motherboard's output signal is a V-by-One signal, the second automatic plug-in mechanism connects the motherboard and the signal restoration board. If the motherboard's output signal is an LVDS format screen signal, the second automatic plug-in mechanism connects the motherboard and the LVDS conversion board, which converts it to a V-by-One signal before transmitting it to the signal restoration board. Similarly, if the motherboard's output signal is an eDP format screen signal, the second automatic plug-in mechanism connects the motherboard and the LVDS and eDP conversion boards, which convert it to a V-by-One signal before transmitting it to the signal restoration board. The signal restoration board converts the received V-by-One signal into a format suitable for the display panel and transmits it to the control device via the PCIE (Peripheral Component Interconnect Express) bus for further analysis and judgment to obtain the detection result.

[0041] In summary, this invention, by introducing automation and signal processing technologies, achieves comprehensive, accurate, and efficient testing of the signal processing functions of the display motherboard. Through a first and a second automatic plug-in / plug-out mechanism, it automatically plugs and unplugs signal cables and screen cables, reducing the complexity and workload of manual operation. Simultaneously, precise control of the entire testing process by the control device improves testing efficiency and accuracy. A signal conversion device converts the single signal output by the control device into multiple input signals to adapt to the input requirements of different display motherboards. Furthermore, a signal restoration device restores the screen signal output by the display motherboard into a recognizable signal for subsequent analysis and judgment. This reduces reliance on multiple display screens and lowers testing costs.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A detection device for detecting the signal processing function of a display motherboard, characterized in that, include: Control device, signal conversion device, display motherboard, first automatic plug-in / plug-out mechanism, second automatic plug-in / plug-out mechanism, and signal restoration device; The control device is connected to the signal conversion device, the first automatic plugging and unplugging mechanism, and the second automatic plugging and unplugging mechanism via a control bus. The control device is connected to the signal conversion device via an HDMI signal cable; The signal conversion device and the display motherboard are connected by HDMI signal lines, VGA signal lines, DVI signal lines and DP signal lines that are controlled to be turned off by a first automatic plugging and unplugging mechanism. The control device is connected to the signal restoration device via a PCIe bus; The display motherboard and the signal restoration device are connected by a screen cable that is controlled to be turned off by a second automatic plugging and unplugging mechanism.

2. The detection device for detecting the signal processing function of a display motherboard according to claim 1, characterized in that, The detection device further includes: a power supply and a third automatic plug-in / plug-out mechanism; the third automatic plug-in / plug-out mechanism is connected to the control device via a control bus; a power line that is controlled to be turned off by the third automatic plug-in / plug-out mechanism is connected between the power supply and the display motherboard.

3. The detection device for detecting the signal processing function of a display motherboard according to claim 2, characterized in that, The first automatic plug-in / plug-out mechanism includes a floating DC power connector; the second automatic plug-in / plug-out mechanism includes floating HDMI, VGA, DVI, and DP connectors; and the third automatic plug-in / plug-out mechanism includes a floating FPC screen cable connector.

4. A detection device for detecting the signal processing function of a display motherboard according to claim 1, characterized in that, The control device includes an industrial computer, a microcontroller, or a PC.

5. A detection device for detecting the signal processing function of a display motherboard according to claim 1, characterized in that, The signal restoration device includes: a signal restoration board, an LVDS conversion board, and an eDP conversion board; the display motherboard is connected to the signal restoration board, the LVDS conversion board, and the eDP conversion board respectively via a screen cable controlled to be turned off by a second automatic plug-in mechanism; the LVDS conversion board is connected to the signal restoration board via a screen cable; the eDP conversion board is connected to the signal restoration board via a screen cable.

6. A detection device for detecting the signal processing function of a display motherboard according to claim 5, characterized in that, The LVDS conversion board is used to convert low-voltage differential LVDS screen signals into high-speed serial V-by-One signals; the eDP conversion board is used to convert all-digital eDP screen signals into high-speed serial V-by-One signals; and the signal restoration board is used to convert high-speed serial V-by-One signals into a format suitable for display panels and transmit them to the control device via the PCIe bus.

7. A detection device for detecting the signal processing function of a display motherboard according to claim 1, characterized in that, The signal conversion device includes: a signal switcher, a first signal converter, a second signal converter, and a third signal converter; the signal switcher is connected to a control device via an HDMI signal cable; the signal switcher is connected to the first signal converter, the second signal converter, and the third signal converter via HDMI signal cables respectively; the signal switcher is connected to the display motherboard via an HDMI signal cable controlled to be turned off by a first automatic plug-in mechanism; the first signal converter is connected to the display motherboard via a VGA signal cable controlled to be turned off by a first automatic plug-in mechanism; the second signal converter is connected to the display motherboard via a DVI signal cable controlled to be turned off by a first automatic plug-in mechanism; the third signal converter is connected to the display motherboard via a DP signal cable controlled to be turned off by a first automatic plug-in mechanism; the first signal converter, the second signal converter, and the third signal converter are connected to the control device via a control bus.

8. A detection device for detecting the signal processing function of a display motherboard according to claim 7, characterized in that, The signal switcher is used to distribute one HDMI signal input from the control device to multiple HDMI output ports.

9. A detection device for detecting the signal processing function of a display motherboard according to claim 7, characterized in that, The first signal converter, the second signal converter, and the third signal converter; the first signal converter is used to convert HDMI signals to VGA signals, the second signal converter is used to convert HDMI signals to DVI signals, and the third signal converter is used to convert HDMI signals to DP signals.

Images