Plug-in display system and its power-on method

Abstract

This paper discloses a pluggable display system, including a host subsystem and a panel subsystem. The host subsystem includes a first inter-board connector, a main control module, and a pluggable detection circuit. The panel subsystem includes a power module and an interface module. The interface module includes a second inter-board connector. The pluggable detection circuit is configured to detect the connection relationship between the first inter-board connector and the second inter-board connector and send the detection result to the main control module. The main control module is configured to, if it receives a standby signal, determine whether the power-on condition is met based on the detection result of the pluggable detection circuit, and if so, send a power enable signal to the power module. The power module is configured to, if it detects an external power input signal, send a standby signal to the main control module, and if it receives a power enable signal, output multiple DC power signals to power the display system. The first inter-board connector and the second inter-board connector are pluggable connectors.

Description

Technical Field

[0001] This article relates to, but is not limited to, the field of display technology, particularly pluggable display systems and their power-on methods. Background Technology

[0002] With the promotion of emerging display products such as conference flat panels and digital signage, display panels are developing towards intelligence.

[0003] Intelligent display panels integrate the computer's motherboard, memory, hard drive, peripheral interfaces, and other components into a single unit, resulting in a lighter and more portable design. However, because the circuitry of the computer and the display panel is integrated, both panel and computer malfunctions require complete system testing and repair. This is particularly inconvenient for large-size display products, increasing maintenance costs and complexity. Invention Overview

[0005] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0006] This disclosure provides a pluggable display system and its power-on method.

[0007] In a first aspect, embodiments of this disclosure provide a pluggable display system, including: a host subsystem and a panel subsystem; the host subsystem includes: a first inter-board connector, a main control module, and a pluggable / pluggable detection circuit; the panel subsystem includes a power module and an interface module; the interface module includes a second inter-board connector;

[0008] The insertion / removal detection circuit is configured to detect the connection relationship between the first inter-board connector and the second inter-board connector, and send the detection result to the main control module.

[0009] The main control module is connected to the first board connector and the insertion / removal detection circuit. It is configured to determine whether the power-on conditions are met based on the detection result of the insertion / removal detection circuit if a standby signal is received. If so, it sends a power enable signal to the power module.

[0010] The power module, connected to the interface module, is configured to send a standby signal to the main control module through the interface module and the first board connector if an external power input signal is detected; and to output multiple DC power signals to power the display system if a power enable signal is received.

[0011] Secondly, embodiments of this disclosure provide a power-on method for a pluggable display system, including:

[0012] The insertion / removal detection circuit detects the connection relationship between the first inter-board connector and the second inter-board connector, and sends the detection result to the main control module; if the power module detects an input signal from an external power source, it sends a standby signal to the main control module through the interface module and the first inter-board connector.

[0013] After receiving the standby signal, the main control module determines whether the power-on conditions are met based on the detection results of the plug-in / plug-out detection circuit. If so, it sends a power enable signal to the power module.

[0014] If the power module receives a power enable signal, it outputs multiple DC power signals to power the display system.

[0015] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood.

[0016] Overview of the attached figures

[0017] The accompanying drawings are used to provide an understanding of the technical solutions disclosed herein and form part of the specification. They are used together with the embodiments of the present disclosure to explain the technical solutions of the present disclosure and do not constitute a limitation on the technical solutions of the present disclosure.

[0018] Figure 1 This is a schematic diagram of the structure of a pluggable display system provided in an embodiment of the present disclosure;

[0019] Figure 2 A schematic diagram of the structure of a pluggable display system (including a backlight module) provided in an embodiment of this disclosure;

[0020] Figure 3 A schematic diagram of the structure of a pluggable display system (including a touch module) provided in an embodiment of this disclosure;

[0021] Figure 4-a A schematic diagram of the insertion / removal detection circuit provided in an embodiment of this disclosure (host subsystem side);

[0022] Figure 4-b A schematic diagram (interface module) of the insertion / removal detection circuit provided in an embodiment of this disclosure;

[0023] Figure 5 A schematic diagram of a real-time clock power supply circuit provided in an embodiment of this disclosure;

[0024] Figure 6 This is a schematic diagram of the structure of a panel subsystem provided in an embodiment of the present disclosure;

[0025] Figure 7 This is a schematic diagram of the structure of a host subsystem provided in an embodiment of the present disclosure;

[0026] Figure 8 A flowchart of powering on a display system is provided as an embodiment of this disclosure;

[0027] Figure 9 A timing diagram illustrating the power-on and power-off process of a portion of a display system signal, provided as an embodiment of this disclosure;

[0028] Figure 10 A flowchart illustrating a power-on method for a pluggable display system provided in this embodiment of the present disclosure.

[0029] Detailed Explanation

[0030] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element of any other embodiment, or may substitute for any other feature or element of any other embodiment.

[0031] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0032] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0033] Figure 1This is a schematic diagram of the structure of a pluggable display system provided in an embodiment of the present disclosure, as shown below. Figure 1 As shown, the pluggable display system may include: a host subsystem 1 and a panel subsystem 2; the host subsystem includes: a first inter-board connector 11, a main control module 13 and a pluggable detection circuit 15; the panel subsystem includes a power module 21 and an interface module 23; the interface module includes a second inter-board connector 231;

[0034] The insertion / removal detection circuit is configured to detect the connection relationship between the first inter-board connector and the second inter-board connector, and send the detection result to the main control module.

[0035] The main control module is connected to the first board connector and the insertion / removal detection circuit. It is configured to determine whether the power-on conditions are met based on the detection result of the insertion / removal detection circuit if a standby signal is received. If so, it sends a power enable signal to the power module.

[0036] The power module, connected to the interface module, is configured to send a standby signal to the main control module through the interface module and the first board connector if an external power input signal is detected; and to output multiple DC power signals to power the display system if a power enable signal is received.

[0037] In some exemplary embodiments, the host subsystem is a detachable structure, and the host subsystem and the panel subsystem are detachably connected via a first inter-board connector and a second inter-board connector. For example, the first inter-board connector and the second inter-board connector are plug-in connectors, with the first inter-board connector being a plug and the second inter-board connector being a socket.

[0038] In this embodiment, the display system includes a host subsystem and a panel subsystem. By setting a first inter-board connector in the host subsystem and a second inter-board connector in the panel subsystem, a detachable connection between the host subsystem and the panel subsystem can be achieved. This detachable connection facilitates troubleshooting and maintenance of the display system, and also allows for functional upgrades. The display system provides system plug-in / plug-out information to the main control module through a plug-in / plug-out detection circuit, and provides power-on information to the main control module through a power-on detection mechanism of the power module. After the power module is powered on, the main control module determines whether the power-on conditions are met based on the detection results of the plug-in / plug-out detection circuit. If so, it sends a power enable signal to the power module. If the power module receives the power enable signal, it outputs multiple DC power signals to power the display system. Since the power module does not directly power the display system after power-on, but rather powers the display system under the control of the main control module, damage that may be caused by plug-in / plug-out operations is avoided, protecting the electrical safety of the system.

[0039] In some exemplary embodiments, the power module is configured to send a standby signal to the main control module via the interface module and the first inter-board connector in the following manner:

[0040] If the power module detects an input signal from an external power source, it outputs a standby signal to the standby signal terminal of the second inter-board connector.

[0041] When the first inter-board connector and the second inter-board connector are connected together, all signal terminals of the first inter-board connector and the second inter-board connector are connected in a one-to-one correspondence.

[0042] In the above embodiment, after the power module is powered on, if the first inter-board connector and the second inter-board connector are not connected together, the main control module will not receive the standby signal. Only when the first inter-board connector and the second inter-board connector are connected together can the main control module receive the standby signal.

[0043] In some exemplary embodiments, the standby signal can be a DC signal with a fixed voltage value. For example, the standby signal can be a 5V DC signal. If the power module is not powered on, the standby signal terminal of the second inter-board connector will not have a 5V DC signal, and the main control module will not receive a 5V standby signal. If the power module is powered on, the main control module can receive a 5V standby signal when the first and second inter-board connectors are connected together; when the first and second inter-board connectors are not connected, the main control module will not receive a 5V standby signal. Therefore, the main control module can only receive a 5V standby signal when the power module is powered on and the two inter-board connectors are connected together.

[0044] In some exemplary embodiments, the main control module is further configured to save the system's default boot mode settings if the system receives user settings for the boot mode after booting up; otherwise, it retains the default boot mode.

[0045] In some exemplary embodiments, the boot mode includes: manual mode and automatic mode; the automatic mode includes: delayed boot mode and non-delayed boot mode; wherein, the delay time of the delayed boot mode can be selected or customized by the user, and if the user does not set the delay time, the system can have a default delay time; wherein, the system default boot mode is manual mode or delayed boot mode.

[0046] In some exemplary implementations, manual power-on mode refers to powering on via human-computer interaction. For example, the user can trigger power-on by operating remote control buttons or buttons on the system device.

[0047] In some exemplary implementations, the main control module is configured to determine whether the power-on conditions are met based on the detection results of the insertion / removal detection circuit in the following manner:

[0048] If the first board connector and the second board connector are connected for the first time, or if the main control module has never sent a power enable signal to the power module since the first board connector and the second board connector changed from the latest unconnected state to the connected state, then the power-on condition is determined according to the default power-on mode.

[0049] If the main control module sends a power enable signal to the power module after the first board connector and the second board connector change from the most recent unconnected state to the connected state, then the power-on mode setting information is queried. If the user has set the power-on mode, the power-on conditions are determined according to the user's setting. If the user has not set the power-on mode, the power-on conditions are determined according to the default power-on mode.

[0050] In some exemplary implementations, the main control module is configured to determine whether the boot conditions are met based on the system's default boot mode in the following manner:

[0051] If the system's default boot mode is manual, it waits to receive a manual trigger signal. If a manual trigger signal is received, it is determined that the boot conditions are met.

[0052] If the system's default boot mode is delayed boot mode, it will wait for the delay time before determining if the boot conditions are met.

[0053] In some exemplary implementations, the main control module is configured to determine whether the power-on conditions are met based on the user-defined power-on mode in the following manner:

[0054] If the user sets the power-on mode to manual mode, then wait to receive a manual trigger signal. If a manual trigger signal is received, then it is determined that the power-on conditions are met.

[0055] If the user sets the boot mode to delayed boot mode, the boot conditions will be determined after the delay time.

[0056] If the user sets the boot mode to non-delayed startup mode, then the boot conditions are met.

[0057] In the above implementation, upon initial connection or each subsequent reconnection, the host subsystem and panel subsystem execute the boot process according to the system default boot mode upon first power-on. Subsequent power-ons execute the boot process according to the user-defined boot mode. If the user has not set a boot mode, the system default boot process is used. Because the connection between the host subsystem and panel subsystem may be performed while the power module is powered on, using the system default boot mode (manual mode or delayed start mode) increases the reliability of system power-on and avoids electrical sparks caused by unreliable or fluctuating connections between the two boards.

[0058] In some exemplary embodiments, the main control module is further configured to send a power enable signal to the power module when it receives a request to disconnect the connection between the first inter-board connector and the second inter-board connector or a power-off request.

[0059] The power module is also configured to stop outputting power signals other than standby signals when it receives a power enable signal;

[0060] In some exemplary implementations, sending requests to the main control module to disconnect the first inter-board connector and the second inter-board connector, as well as power-off requests, can be achieved through human-computer interaction. For example, a user can send requests to the main control module to disconnect the first inter-board connector and the second inter-board connector, or to power off, through an application.

[0061] In the above implementation, a disconnection request is first sent to the system through human-computer interaction to stop the power supply to the display system. This can improve the electrical safety of disconnecting the two board connectors when the power is on.

[0062] In some exemplary embodiments, the power supply module is configured to output multiple DC power signals to power the display system based on a power enable signal sent by the main control module:

[0063] The AC voltage signal input from the external power supply is converted into multiple DC voltage signals and output. Part of the multiple DC voltage signals is provided to the panel subsystem, and the other part is provided to the host subsystem through the connection between the second inter-panel connector and the first inter-panel connector.

[0064] In the above embodiment, after receiving the power enable signal, the power module is responsible for supplying power to the entire display system. The power module converts the AC voltage signal input from the external power source into multiple DC voltage signals and outputs them. One part of the DC power signal is provided to the panel subsystem, and the other part of the DC power signal is provided to the host subsystem.

[0065] In some exemplary implementations, such as Figure 2As shown, the panel subsystem also includes a display driver module 25, a display module 27, and a backlight module 29;

[0066] The main control module is also configured to load the software system after power-on, and after loading is complete, output brightness control signal and light emission enable signal to the backlight module in sequence through the first board connector and interface module.

[0067] The backlight module is connected to the display module and the interface module, and is connected to the main control module through the interface module and the connector between the second board. It is configured to provide a light source signal to the display module under the control of the main control module.

[0068] In the above implementation, the main control module also loads the software system after power-on. After loading is complete, it outputs brightness control signal and light-emitting enable signal to the backlight module in sequence. After receiving the light-emitting enable signal, the backlight module lights up the screen.

[0069] In some exemplary embodiments, the main control module is further configured to output a light emission enable signal to the backlight module through the first inter-board connector and the interface module when it receives a request to disconnect the connection between the first inter-board connector and the second inter-board connector or a power-off request.

[0070] The backlight module is also configured to receive an emission enable signal to control the screen to turn off.

[0071] In some exemplary implementations, such as Figure 3 As shown, when the display module includes a touch panel, the panel subsystem further includes a touch module 22;

[0072] The touch module is connected to the display module and the interface module, and is connected to the main control module through the interface module and the connector between the second board. It is configured to collect touch signals and send them to the main control module under the control of the main control module.

[0073] In some exemplary implementations, such as Figure 4-a As shown, the insertion / removal detection circuit includes: a first resistor R1, a second resistor R2, and a first diode D1;

[0074] The first end of the first resistor is connected to the plug-in power signal terminal Plug_VCC of the first inter-board connector, and the second end of the first resistor is connected to the cathode of the first diode; the anode of the first diode is connected to the first power signal terminal VCC_CON.

[0075] The first end of the second resistor is connected to the hot-plug signal terminal Hot_Plug of the first inter-board connector, and the second end of the second resistor is grounded; the hot-plug signal terminal Hot_Plug, as the output terminal of the insertion and removal detection circuit, is also connected to the main control module.

[0076] Among them, the first power signal terminal VCC_CON is used to provide an uninterrupted power signal.

[0077] like Figure 4-b As shown, the second inter-board connector includes a plug-in power signal terminal Plug_VCC and a hot-plug signal terminal Hot_Plug, which correspond one-to-one with the first inter-board connector, and the plug-in power signal terminal and the hot-plug signal terminal are shorted together on the second inter-board connector.

[0078] In the above embodiment, when the first inter-board connector and the second inter-board connector are connected together, the first resistor and the second resistor form a voltage divider circuit to divide the voltage signal at the first power signal terminal. Assume the voltage value of the voltage signal at the first power signal terminal is V. in Then, the voltage value V of the voltage signal at the output terminal of the insertion / removal detection circuit. out For: V out =V in *(r2 / (r1+r2)); where r2 is the resistance value of resistor R2 and r1 is the resistance value of resistor R1. When the first inter-board connector and the second inter-board connector are not connected, the plug-in power signal terminal Plug_VCC and the hot-plug signal terminal Hot_Plug of the first inter-board connector are floating. Then, the voltage value V of the voltage signal at the output terminal of the plug-in detection circuit is... out The value is 0. The plug-in / plug-out detection circuit notifies the main control module's host subsystem whether the panel subsystem is connected by outputting signals with different voltages.

[0079] In some exemplary embodiments, the host subsystem further includes a real-time clock module and a real-time clock power supply circuit. The real-time clock module is connected to the main control module and configured to continuously record time information and send it to the main control module.

[0080] The real-time clock power supply circuit is configured to use the DC power signal output by the power module as the input power signal when the power module is powered on, and to use the DC power signal output by the battery as the input power signal when the power module is not powered on. It generates an uninterruptible power signal based on the input power signal and outputs the uninterruptible power signal to the real-time clock module at the output terminal of the real-time clock power supply circuit.

[0081] In some exemplary implementations, such as Figure 5 As shown, the real-time clock power supply circuit includes: a DC-DC converter sub-circuit, a second diode D2, a third diode D3, and a first capacitor C1;

[0082] The input terminal of the DC voltage conversion sub-circuit is connected to the standby signal terminal STB of the first inter-board connector, and the output terminal of the DC voltage conversion sub-circuit is connected to the anode of the second diode; the DC voltage conversion sub-circuit is configured to step down the input DC voltage signal to generate a new DC voltage signal for output; the cathode of the second diode is connected to the output terminal RTC_VCC of the real-time clock power supply circuit;

[0083] The anode of the third diode is connected to the positive terminal of the battery, and the cathode of the third diode is connected to the output terminal of the real-time clock power supply circuit; the negative terminal of the battery is grounded.

[0084] The first terminal of the first capacitor is connected to the output terminal of the real-time clock power supply circuit, and the second terminal of the first capacitor is grounded.

[0085] Among them, when the power module is powered on, the voltage value of the standby signal output on the standby signal terminal is higher than the positive voltage of the battery.

[0086] In the above embodiment, when the power module is powered on, it outputs a standby signal. Since the voltage of the standby signal is higher than the positive terminal voltage of the battery, the third diode is cut off. The standby signal provides the input voltage signal to the real-time clock power supply circuit, that is, the external power supply of the power module powers the real-time clock module, and the battery does not consume power. When the power module is not powered on, the battery provides the input voltage signal to the real-time clock power supply circuit, that is, the battery continues to power the real-time clock module.

[0087] In some exemplary embodiments, the first power signal terminal is connected to the output terminal of the real-time clock power supply circuit. In this embodiment, the output terminal of the real-time clock power supply circuit serves both as the power supply terminal for the real-time clock module and as the signal input terminal for the uninterruptible power supply signal of the insertion / removal detection circuit.

[0088] In some exemplary embodiments, the pluggable display system includes: conference flat panel, smart whiteboard, digital signage, etc.

[0089] In some exemplary embodiments, the first board-to-board connector includes a JAE plug interface, and the second board-to-board connector includes a JAE receptacle interface. For example, the first board-to-board connector includes a JAE TX25A plug interface, and the second board-to-board connector includes a JAE TX24A receptacle interface.

[0090] Table 1 below shows the signal group between the panel subsystem and the motherboard subsystem designed using the JAE TX25A plug interface (80 pins) and the JAE TX24A socket interface provided in this disclosure.

[0091]

[0092]

[0093] Table 1

[0094] Figure 6 This is a schematic diagram of the panel subsystem of a pluggable display system provided in an embodiment of this disclosure. Figure 6 As shown, the panel subsystem may include: a power board, an interface board, a display driver board, a backlight board, a touch panel, and a display module. The interface board includes: a second board connector, a DC power supply control unit, a backlight control unit, a touch control unit, and a display control unit. The panel subsystem connects to the host subsystem via the second board connector. The second board connector can use a JAETX24 socket interface, which has 80 pins, meeting the signal line requirements between the panel subsystem and the host subsystem.

[0095] Figure 7 This is a schematic diagram of the host subsystem of a pluggable display system provided in an embodiment of this disclosure. Figure 7 As shown, the host subsystem may include: a main control module (SoC), a first inter-board connector, a power management module, a storage module, a real-time clock module, a USB interface module, an RS232 / 485 interface module, an Ethernet interface module, a video interface module, and a headphone jack module. The main control module is connected to the other modules on the host subsystem, and is connected to the panel subsystem via the first inter-board connector, the second inter-board connector, and the panel subsystem. The storage module may include at least one of the following: a DDR (Double Data Rate) module or an eMMC (Embedded Multi Media Card) module. The video interface module may include an HDMI (High Definition Multimedia Interface) module.

[0096] Figure 8 This is a power-on flowchart of a display system provided as an embodiment of the present disclosure. Figure 8As shown, the host subsystem is connected to the second inter-board connector via the first inter-board connector. The power switch on the power board is turned on, powering on the power board and connecting it to 220V AC power. The power board also outputs a standby signal. Upon receiving the standby signal, the main control module determines whether this power-on is the first power-on since the system was plugged in and unplugged. If it is the first power-on, the main control module receives a power-on trigger signal from the remote control or a button and sends a power enable signal to the power board. If it is not the first power-on, the main control module determines whether the power-on conditions are met based on the power-on mode already set in the display system. If the power-on conditions are met, the main control module sends a power enable signal to the power board. Upon receiving the power enable signal, the power board converts the external AC voltage signal into multiple DC voltage signals, such as 12V, 5V, and 24V. A portion of these DC voltage signals is provided to the panel subsystem, and the other portion is provided to the host subsystem via the connection between the second and first inter-board connectors. The main control module is powered on and enters the boot sequence. The main control module sequentially starts the system Loader (boot program), Kernel (kernel), etc. The main control module outputs brightness control signals and light-emitting enable / de-enable signals to the backlight board, the display screen lights up, and the main control module completes the boot.

[0097] Figure 9 This is a timing diagram illustrating the power-on and power-off process of a display system's signals, provided as an embodiment of this disclosure. Figure 9As shown, when the power switch on the power board is turned on, the power board powers on and outputs a standby signal STB. At this time, only basic low-power control circuits, such as remote control circuits, operate within the host subsystem. If this power board power-on is the first power-on after the system has been plugged in and unplugged, it waits to receive a trigger signal (such as a remote control signal). If a trigger signal is received, a power enable signal Standby_ON is sent to the power board. If this power board power-on is not the first power-on after the system has been plugged in and unplugged, the system may have already been set to a power-on mode. In this case, the main control module determines that the power-on conditions are met and sends a power enable signal Standby_ON to the power board. The Standby_ON control signal is the input enable signal of the power board. When it is high, the power board opens the AC-DC path and outputs a DC voltage. The power board outputs 5V, 12V, and BL_VCC (backlight power supply) voltage signals sequentially according to the timing settings. The main control module sequentially starts the system Loader (bootloader), Kernel, etc. It then outputs a brightness control signal ADJ and an illumination enable signal BL_ON to the backlight board, turning on the display and completing the power-on process. If the main control module receives a request to disconnect the first and second inter-board connectors or a power-off request, it outputs an illumination de-enable signal BL_OFF to the backlight board, and then outputs a power de-enable signal Standby_OFF to the power board. Upon receiving the illumination de-enable signal, the backlight module turns off the screen, and upon receiving the power de-enable signal Standby_OFF, the power board stops outputting DC power signals except for the standby signal STB.

[0098] The display system will automatically start via buttons or remote control upon first power-on after being plugged in or unplugged. After powering on, users can configure the system to automatically start upon power-on in the system settings, enabling this feature on subsequent power-on cycles.

[0099] Table 2 is a schematic diagram of the signal and signal line index of a power interface provided in an embodiment of this disclosure.

[0100]

[0101]

[0102] Table 2

[0103] As shown in Table 2, STB is the standby signal sent by the power module to the main control module after the power module is powered on. Standby_ON / OFF is the power enable / de-enable signal, sent by the main control module to the power module, enabling or disabling the power board to output multiple DC power signals. GND is the zero potential of the aforementioned power supply. ADJ is the brightness control signal sent by the main control module to the backlight module, and BL_ON / OFF is the light emission enable / de-enable signal sent by the main control module to the backlight module. 5V is the controlled 5V power supply signal; BL_VCC is the power supply signal for the backlight board; and 12V is the controlled 12V power supply signal.

[0104] Table 3 is a schematic diagram of the signal and signal line index of a backlight interface provided in an embodiment of this disclosure.

[0105]

[0106] Table 3

[0107] As shown in Table 3, ADJ is the brightness control signal sent by the main control module to the backlight module, BL_ON / OFF is the light emission enable / de-enable signal sent by the main control module to the backlight module, and BL_VCC is the power signal of the backlight panel.

[0108] Tables 4 and 5 are schematic diagrams of signals and pins for a touch interface provided in an embodiment of this disclosure.

[0109]

[0110]

[0111] Table 4

[0112]

[0113] Table 5

[0114] As shown in Tables 4 and 5, the touch interface includes touch interface 1 and touch interface 2. Touch interface 1 includes power supply VCC and GND, USB DM and USB DP signals; touch interface 2 includes power supply VCC and GND, I2C bus SCL and SDA, interrupt signal INT and reset signal RST.

[0115] Table 1 shows the signal group between the panel subsystem and the motherboard subsystem designed using the JAE TX25A plug interface (80 pins) and the JAE TX24A socket interface, as provided in this disclosure. The signal group includes: main power supply signals 12V and GND; VbyOne display bus control signals VBO_SCL and VBO_SDA; insertion status detection signal VBO_HTPDN; clock recovery lock status signal VBO_LOCKN; 8-channel VbyOne data differential signals VBO0 to VBO7; power supply status output signal PWR_Status; hot-plug signal (main control module insertion status detection) Hot_Plug; plug-in / plug-out power signal (main control module insertion detection power supply); key input pin AD_Key; red... External input pin IR; backlight module brightness control signal (backlight control output) ADJ; light-emitting enable / de-enable signal BL_ON / OFF; USB touch function signals TP_USB_DM and TP_USB_DP; touch I2C signals TP_SCL and TP_SDA, touch interrupt signal TP_INT, touch reset signal TP_RST; left and right channel output signals of the speaker; fan control signal SYS_FAN; power enable / de-enable signal Standby_ON / OFF; standby signal STB; 5V controlled power supply; Reserved is a reserved pin that can be defined according to actual needs.

[0116] The signals and their indices shown in Table 1 are just examples. You can replace the signals according to your scenario, such as replacing the VbyOne interface with an HDMI or DP interface, or adding other interfaces, such as USB 2.0, USB 3.0, Ethernet, etc.

[0117] Figure 10 A flowchart illustrating a power-on method for a pluggable display system provided in this disclosure embodiment is shown below. Figure 10 As shown, the power-on method for a pluggable display system may include:

[0118] In step S10, the insertion / removal detection circuit detects the connection relationship between the first inter-board connector and the second inter-board connector, and sends the detection result to the main control module; if the power module detects an input signal from an external power source, it sends a standby signal to the main control module through the interface module and the first inter-board connector.

[0119] Step S20: After receiving the standby signal, the main control module determines whether the power-on conditions are met based on the detection results of the plug-in / plug-out detection circuit. If so, it sends a power enable signal to the power module.

[0120] In step S30, if the power module receives a power enable signal, it outputs multiple DC power signals to power the display system.

[0121] In the embodiments provided in this disclosure, the display system provides system plug-in / plug-out information to the main control module through a plug-in / plug-out detection circuit and power-on information to the main control module through a power-on detection mechanism of the power module. After the power module is powered on, the main control module determines whether the power-on conditions are met based on the detection results of the plug-in / plug-out detection circuit. If so, it sends a power enable signal to the power module. The power module then outputs multiple DC power signals to power the display system based on the power enable signal sent by the main control module. Since the power module does not directly power the display system after power-on, but rather powers the display system under the control of the main control module, damage that may be caused by plug-in / plug-out operations is avoided, thus protecting the electrical safety of the system.

[0122] In some exemplary embodiments, the main control module determines whether the power-on conditions are met based on the detection results of the insertion / removal detection circuit, including:

[0123] If the first board connector and the second board connector are connected together for the first time, or if the main control module has never sent a power enable signal to the power module since the first board connector and the second board connector changed from the latest unconnected state to the connected state, the main control module will determine whether the power-on conditions are met according to the default power-on mode.

[0124] If the main control module sends a power enable signal to the power module after the first inter-board connector and the second inter-board connector change from the most recent unconnected state to the connected state, the main control module queries the power-on mode setting information. If the user has set the power-on mode, the main control module determines whether the power-on conditions are met based on the user-set power-on mode. If the user has not set the power-on mode, the main control module determines whether the power-on conditions are met based on the default power-on mode.

[0125] In some exemplary implementations, the main control module also displays that if it receives user settings for the boot mode after the system boots up, it saves the settings; otherwise, it retains the system's default boot mode.

[0126] In some exemplary embodiments, the power-on mode includes: manual mode and automatic mode;

[0127] The automatic modes include: delayed start mode and non-delayed start mode;

[0128] The default boot modes for the system include: manual mode or delayed boot mode.

[0129] In some exemplary embodiments, when the main control module receives a request to disconnect the first inter-board connector and the second inter-board connector or a power-off request, it sends a power de-enable signal to the power module; upon receiving the power de-enable signal, the power module stops outputting power signals other than the standby signal.

[0130] In some exemplary embodiments, after the main control module is powered on, it loads the software system. After loading is complete, it outputs brightness control signals and light emission enable signals to the backlight module sequentially through the first inter-board connector and the interface module. Under the control of the main control module, the backlight module provides light source signals to the display module. When the main control module receives a request to disconnect the first inter-board connector and the second inter-board connector or a power-off request, it sends a light emission disable signal to the backlight module. When the backlight module receives the light emission disable signal, it controls the screen to turn off.

[0131] In some exemplary embodiments, the power module outputs multiple DC power signals to power the display system, including: the power module converts the AC voltage signal input from the external power source into multiple DC voltage signals and outputs them, a portion of which is provided to the panel subsystem, and another portion is provided to the host subsystem through the connection of the second inter-panel connector and the first inter-panel connector.

[0132] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

Claims

1. A pluggable display system, comprising: Host subsystem and panel subsystem; The host subsystem includes: a first inter-board connector, a main control module, and a plug-in / plug-out detection circuit; the panel subsystem includes a power module and an interface module; the interface module includes a second inter-board connector; The insertion / removal detection circuit is configured to detect the connection relationship between the first inter-board connector and the second inter-board connector, and send the detection result to the main control module. The main control module is connected to the first board connector and the insertion / removal detection circuit. It is configured to determine whether the power-on conditions are met based on the detection result of the insertion / removal detection circuit if a standby signal is received. If so, it sends a power enable signal to the power module. The power module, connected to the interface module, is configured to send a standby signal to the main control module through the interface module and the first inter-board connector if an external power input signal is detected, and to output multiple DC power signals to power the display system if a power enable signal is received; wherein, a portion of the multiple DC power signals is provided to the panel subsystem, and another portion is provided to the host subsystem through the connection between the second inter-board connector and the first inter-board connector.

2. The display system as claimed in claim 1, wherein: The host subsystem is a detachable structure, and the host subsystem and the panel subsystem are detachably connected through a first inter-board connector and a second inter-board connector.

3. The display system as described in claim 1, wherein: The main control module is also configured to save the system's boot mode settings if the system receives user settings after booting; otherwise, it will retain the system's default boot mode.

4. The display system as described in claim 3, wherein: The main control module is configured to determine whether the power-on conditions are met based on the detection results of the insertion / removal detection circuit in the following way: If the first board connector and the second board connector are connected together for the first time, or if the main control module has never sent a power enable signal to the power module since the first board connector and the second board connector changed from the latest unconnected state to the connected state, the main control module will determine whether the power-on conditions are met according to the default power-on mode. If the main control module sends a power enable signal to the power module after the first inter-board connector and the second inter-board connector change from the most recent unconnected state to the connected state, the main control module queries the power-on mode setting information. If the user has set the power-on mode, the main control module determines whether the power-on conditions are met based on the user-set power-on mode. If the user has not set the power-on mode, the main control module determines whether the power-on conditions are met based on the default power-on mode.

5. The display system as described in claim 3 or 4, wherein: The power-on modes include: manual mode and automatic mode; The automatic modes include: delayed start mode and non-delayed start mode; The default boot modes for the system include: manual mode or delayed boot mode.

6. The display system as claimed in claim 1, wherein: The main control module is also configured to send a power enable signal to the power module when it receives a request to disconnect the first inter-board connector and the second inter-board connector or a power-off request. The power module is also configured to stop outputting power signals other than standby signals when it receives a power enable signal.

7. The display system as claimed in claim 1, wherein: The panel subsystem also includes a display driver module, a display module, and a backlight module; The main control module is also configured to load the software system after power-on, and after loading is complete, output brightness control signal and light emission enable signal to the backlight module in sequence through the first board connector and interface module. The backlight module is connected to the display module and the interface module, and is connected to the main control module through the interface module and the connector between the second board. It is configured to provide a light source signal to the display module under the control of the main control module.

8. The display system of claim 7, wherein: The main control module is also configured to output a light emission enable signal to the backlight module through the first inter-board connector and the interface module when it receives a request to disconnect the first inter-board connector and the second inter-board connector or a power-off request. The backlight module is also configured to receive an emission enable signal to control the screen to turn off.

9. The display system as claimed in claim 1, wherein: The insertion / removal detection circuit includes: a first resistor, a second resistor, and a first diode; The first end of the first resistor is connected to the plug-in power signal terminal of the first inter-board connector, and the second end of the first resistor is connected to the cathode of the first diode; the anode of the first diode is connected to the first power signal terminal. The first end of the second resistor is connected to the hot-plug signal terminal of the first board connector, and the second end of the second resistor is grounded; the hot-plug signal terminal, as the output terminal of the insertion / removal detection circuit, is also connected to the main control module. The first power signal terminal is used to provide an uninterrupted power signal.

10. The display system of claim 9, wherein: The host subsystem also includes a real-time clock module and a real-time clock power supply circuit. The real-time clock module is connected to the main control module and is configured to continuously record time information and send it to the main control module. The real-time clock power supply circuit is configured to use the DC power signal output by the power module as the input power signal when the power module is powered on, and to use the DC power signal output by the battery as the input power signal when the power module is not powered on. It generates an uninterruptible power signal based on the input power signal and outputs the uninterruptible power signal to the real-time clock module at the output terminal of the real-time clock power supply circuit.

11. The display system of claim 10, wherein: The real-time clock power supply circuit includes: a DC voltage conversion sub-circuit, a second diode, a third diode, and a first capacitor; The input terminal of the DC voltage conversion sub-circuit is connected to the standby signal terminal of the first inter-board connector, and the output terminal of the DC voltage conversion sub-circuit is connected to the anode of the second diode; the DC voltage conversion sub-circuit is configured to step down the input DC voltage signal to generate a new DC voltage signal for output; the cathode of the second diode is connected to the output terminal of the real-time clock power supply circuit. The anode of the third diode is connected to the positive terminal of the battery, and the cathode of the third diode is connected to the output terminal of the real-time clock power supply circuit; the negative terminal of the battery is grounded. The first terminal of the first capacitor is connected to the output terminal of the real-time clock power supply circuit, and the second terminal of the first capacitor is grounded. Among them, when the power module is powered on, the voltage value of the standby signal output on the standby signal terminal is higher than the positive voltage of the battery.

12. The display system of claim 11, wherein: The first power signal terminal is connected to the output terminal of the real-time clock power supply circuit.

13. A power-on method for a pluggable display system according to any one of claims 1-12, comprising: The insertion and removal detection circuit detects the connection relationship between the first board connector and the second board connector, and sends the detection result to the main control module; If the power module detects an input signal from an external power source, it sends a standby signal to the main control module through the interface module and the first board connector. After receiving the standby signal, the main control module determines whether the power-on conditions are met based on the detection results of the plug-in / plug-out detection circuit. If so, it sends a power enable signal to the power module. If the power module receives a power enable signal, it outputs multiple DC power signals to power the display system; wherein, a portion of the multiple DC power signals is provided to the panel subsystem, and another portion is provided to the host subsystem through the connection between the second inter-board connector and the first inter-board connector.

14. The method of claim 13, wherein: The main control module determines whether the power-on conditions are met based on the detection results of the insertion / removal detection circuit, including: If the first board connector and the second board connector are connected together for the first time, or if the main control module has never sent a power enable signal to the power module since the first board connector and the second board connector changed from the latest unconnected state to the connected state, the main control module will determine whether the power-on conditions are met according to the default power-on mode. If the main control module sends a power enable signal to the power module after the first inter-board connector and the second inter-board connector change from the most recent unconnected state to the connected state, the main control module queries the power-on mode setting information. If the user has set the power-on mode, the main control module determines whether the power-on conditions are met based on the user-set power-on mode. If the user has not set the power-on mode, the main control module determines whether the power-on conditions are met based on the default power-on mode.

15. The method of claim 13, further comprising: When the main control module receives a request to disconnect the first inter-board connector and the second inter-board connector or a power-off request, it sends a power-off enable signal to the power module. When the power module receives the power de-enable signal, it stops outputting power signals other than the standby signal.

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