KVM control device and control system

Abstract

The invention belongs to the technical field of control circuits, and particularly relates to a control device and a control system of a KVM (Keyboard Video Mouse). The USB change-over switch and the display port change-over switch are both connected with the change-over switch control circuit; the key board is connected with the change-over switch control circuit, and a key signal on the key board is transmitted to the change-over switch control circuit; the screen driving circuit is respectively connected with the display port change-over switch and the key board, and is used for driving according to the state of the display port change-over switch and a key signal on the key board; the LCD display screen is connected with the screen driving circuit; the USB interface is connected with the USB change-over switch, and USB data transmission is carried out according to the state of the USB change-over switch. The KVM control device has the beneficial effects that the size of the whole control device is reduced by optimizing the size of each component and improving the connecting structure, so that the flexibility and the convenience when the KVM control device is mounted on a cabinet are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of control circuits, and in particular relates to a control device and a control system for a KVM. Background Art

[0002] KVM is the abbreviation of Keyboard, Video and Mouse. KVM switch, or KVM for short. KVM control platform, also known as LCD kit or KVM all-in-one, is a KVM device that integrates LCD display, keyboard, mouse and switch. At present, with the rapid development of KVM technology, KVM has evolved from a simple one-control multi-computer peripheral to the ability to perform remote device management and power management; it can integrate a company's globally distributed servers into one management platform without being restricted by the operating system; it can be managed using one IP address, and all signals are encrypted using the 128-bit SSL protocol to ensure data security; the latest KVM technology has enabled multiple management terminals to manage tens of thousands of devices (servers and network devices) at the same time.

[0003] For all the equipment placed in the computer room, there is no need to equip them with a set of dedicated operation terminals to occupy the precious computer room space; it also avoids the need to carry an operation terminal (keyboard, mouse and monitor or notebook) to shuttle between noisy cabinets to complete maintenance work as in the past. If the administrator wants to operate a certain device, no matter where the administrator is, he can set, maintain and manage the device through a networked computer.

[0004] When installing a KVM device in a cabinet, multiple factors need to be considered to ensure smooth installation and efficient use of the equipment, including cabinet installation requirements and the installation layout and requirements of the equipment in the cabinet. For example, consider the load-bearing capacity of the cabinet site, especially for downflow data centers, not only the weight of a single cabinet should be considered, but also the total weight of the server after the wiring is installed. The orderly installation of each module, such as the power module is installed on the right side of the cabinet, the power protector is on the top, and the power interface and cable organizer are below. The installation of the bracket in the cabinet should be planned according to the specific thickness of the equipment to be put on the rack later. Consider the angle after the cabinet door is opened, the distance between cabinets, static electricity treatment, cabinet heat, etc.

[0005] Therefore, the installation of KVM devices in cabinets needs to comprehensively consider factors such as the physical characteristics of the cabinets, the installation environment, the equipment layout, and safety, to ensure that the KVM equipment can operate stably and safely while meeting the management and maintenance requirements of the data center. However, in the usual design, KVM devices are not convenient for cabinet installation due to their large size. Summary of the invention

[0006] The object of the present invention is to provide a KVM control device and a control system, which are used to solve the problem that the KVM device is inconvenient to install in a cabinet due to its large size.

[0007] The technical solution of the present invention is as follows: A KVM control device comprises a switching control board, a switching switch control circuit, a key board, a screen driving circuit, an LCD display screen, a USB interface, a USB switching switch and a display port switching switch; the USB switching switch and the display port switching switch are both connected to the switching switch control circuit;

[0008] The keypad is connected to the switch control circuit, and the key signal on the keypad is transmitted to the switch control circuit;

[0009] The screen driving circuit is connected to the display port switching switch and the key board respectively, and is driven according to the state of the display port switching switch and the key signal on the key board;

[0010] The LCD display screen is connected to the screen driving circuit;

[0011] The USB interface is connected to the USB switch, and USB data transmission is performed according to the state of the USB switch.

[0012] The keypad includes an input channel selection key and an OSD menu control key; the input channel selection key and the OSD menu control key are both connected to the switching switch control circuit, and the key signals of the input channel selection key and the OSD menu control key are transmitted to the switching switch control circuit; the OSD menu control key is also connected to the screen driving circuit, and the key signal of the OSD menu control key is transmitted to the screen driving circuit.

[0013] The computer also includes an indicator light module, which includes a first indicator light, a second indicator light, a third indicator light and a fourth indicator light; the input channel selection button includes a first button, a second button, a third button and a fourth button; when the first button is pressed, the first indicator light is on, indicating that the currently used device is switched to the first computer device; when the second button is pressed, the second indicator light is on, indicating that the currently used device is switched to the second computer device; when the third button is pressed, the third indicator light is on, indicating that the currently used device is switched to the third computer device; when the fourth button is pressed, the fourth indicator light is on, indicating that the currently used device is switched to the fourth computer device;

[0014] The OSD menu control buttons include a screen power button, a menu return button, a volume adjustment button, a brightness adjustment button and a menu confirmation button.

[0015] It also includes a buzzer, which is connected to the switch control circuit.

[0016] It also includes a speaker, which is connected to the screen driving circuit.

[0017] The LCD display screen is connected to the external power supply, and the external power supply refers to direct current generated by power conversion from the mains.

[0018] Also included is a USB device, which is connected to the USB interface.

[0019] The USB device includes at least one of a USB keyboard, a USB mouse or a USB 2.0 device.

[0020] A KVM control system comprises at least two computer devices and a KVM control device; a USB interface of the computer device is connected to a USB switch of the KVM control device; and a display port of the computer device is connected to a display port switch of the KVM control device.

[0021] The beneficial effects of the present invention are as follows: the present invention provides a KVM control device composed of a switch control panel, a keypad, a screen drive circuit, an LCD display screen, and a USB interface as main components, and through the optimization of the size of each component and the improvement of the connection structure, the size of the entire control device is reduced, thereby improving the flexibility and convenience of installing the KVM control device in a cabinet. In addition, the control device of the present invention is also provided with indicator lights corresponding to different function keys, as well as sound output components such as buzzers and speakers, thereby allowing users to more intuitively understand the operating status for different operations when using the KVM control device, thereby improving interactivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a KVM control device according to an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a KVM control device according to an embodiment of the present invention;

[0024] Figure 3 A circuit schematic diagram of an input channel selection button and an indicator light of a KVM control device according to an embodiment of the present invention;

[0025] Figure 4 A circuit schematic diagram of an OSD menu control button and an indicator light of a KVM control device according to an embodiment of the present invention;

[0026] Figure 5The present invention is a block diagram of the structure principle of the screen driving circuit of the KVM control device according to the embodiment of the present invention.

[0027] In the figure: 1 switch control board, 11 switch control circuit, 12 USB switch, 13 display port switch, 2 key board, 3 screen drive circuit, 4 LCD display, 5 USB interface, 6 buzzer, 7 speaker, 8 USB device. DETAILED DESCRIPTION

[0028] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0030] The following embodiments of the present invention provide a control device and a control system for a KVM, which solves the problem that the KVM device is inconvenient to install in a cabinet due to its large size.

[0031] The following will describe in detail the principles and implementation methods of a KVM control device and control system of this embodiment in conjunction with the accompanying drawings, so that those skilled in the art can understand the KVM control device and control system of this embodiment without creative work.

[0032] like Figure 1 As shown, a KVM control device provided by an embodiment of the present invention includes: a switch control panel 1, a key panel 2, a screen drive circuit 3, an LCD display screen 4 and a USB interface 5.

[0033] The switch control board 1 includes a switch control circuit 11 , a USB switch 12 , and a display port switch 13 ; the USB switch 12 and the display port switch 13 are both connected to the switch control circuit 11 .

[0034] The keypad 2 is connected to the switch control circuit 11 , and the key signals on the keypad 2 are transmitted to the switch control circuit 11 .

[0035] The screen driving circuit 3 is connected to the display port switching switch 13 and the key board 2 respectively, and is driven according to the state of the display port switching switch 13 and the key signal on the key board 2 .

[0036] The LCD display screen 4 is connected to the screen driving circuit 3 .

[0037] The USB interface 5 is connected to the USB switch 12 , and USB data transmission is performed according to the state of the USB switch 12 .

[0038] like Figure 2 As shown, in the embodiment, the control device of the KVM further includes: a buzzer 6 ; the buzzer 6 is connected to the switching switch control circuit 11 .

[0039] The control device of the KVM further includes: a speaker 7; the speaker 7 is connected to the screen driving circuit 3. Specifically, the speaker 7 can be a loudspeaker or other device that can cooperate with the LCD display screen to output sound.

[0040] The LCD display screen 4 is connected to the external power supply, and the external power supply refers to direct current generated by power conversion from the 220V mains electricity.

[0041] The KVM control device further includes: a USB device 8 ; the USB device 8 is connected to the USB interface 5 .

[0042] The USB device 8 includes at least one of a USB keyboard, a USB mouse or a USB 2.0 device.

[0043] Among them, the USB keyboard and USB mouse can be used for human-computer interaction. In addition, the USB mouse can also be used to switch externally connected computer devices. Specifically, it can be operated through the mouse wheel and left and right buttons. When the user operation is consistent with the preset mouse state, each computer device will be switched to the next adjacent one in turn.

[0044] The keypad includes input channel selection keys and OSD (on-screen display) menu control keys.

[0045] The input channel selection button and the OSD menu control button are both connected to the switching switch control circuit, and the button signals of the input channel selection button and the OSD menu control button are transmitted to the switching switch control circuit.

[0046] The OSD menu control button is also connected to the screen driving circuit, and the button signal of the OSD menu control button is transmitted to the screen driving circuit.

[0047] like Figure 3 As shown, the control device of the KVM further includes: an indicator light module; the indicator light module includes a first indicator light LED3, a second indicator light LED4, a third indicator light LED5 and a fourth indicator light LED6.

[0048] The input channel selection buttons include a first button K7, a second button K8, a third button K9 and a fourth button K10.

[0049] Combination Figure 2 The corresponding relationships among the external computer devices PC1, PC2, PC3 and PC4, buttons, indicators and computer devices are as follows:

[0050] When the first button K7 is pressed, the first indicator LED3 lights up, indicating that the currently used device is switched to the first computer device PC1.

[0051] When the second button K8 is pressed, the second indicator LED4 lights up, indicating that the currently used device is switched to the second computer device PC2.

[0052] When the third button K9 is pressed, the third indicator LED5 lights up, indicating that the currently used device is switched to the third computer device PC3.

[0053] When the fourth button K10 is pressed, the fourth indicator LED6 lights up, indicating that the currently used device is switched to the fourth computer device PC4.

[0054] Among them, LED_COM is the anode common terminal of the first indicator light LED3, the second indicator light LED4, the third indicator light LED5 and the fourth indicator light LED6, which is connected to a forward voltage so that when the switching switch control circuit 11 sets the cathode of any indicator light to a low level, the indicator light is turned on.

[0055] like Figure 4 As shown, the OSD menu control buttons include a screen power button K1, a menu return button K2, a volume adjustment button K3, a brightness adjustment button K4 and a menu confirmation button K5.

[0056] Among them, the screen power button K1 is used as the screen power switch, and different button states indicate turning the power on and off; the menu return button K2 refers to the OSD menu return button; and the menu confirmation button K5 is used for the OSD menu wakeup and setting confirmation functions.

[0057] One end of the screen power button K1, the menu return button K2, the volume adjustment button K3, the brightness adjustment button K4 and the menu confirmation button K5 are all connected to the ground, and the other ends are all connected to the switching switch control circuit 11, so that when any one of the screen power button K1, the menu return button K2, the volume adjustment button K3, the brightness adjustment button K4 and the menu confirmation button K5 is pressed, the low level is input into the switching switch control circuit 11.

[0058] In addition, the other ends of the screen power button K1, the menu return button K2, the volume adjustment button K3, the brightness adjustment button K4 and the menu confirmation button K5 are also connected to the screen driving circuit 3, so that when any one of the screen power button K1, the menu return button K2, the volume adjustment button K3, the brightness adjustment button K4 and the menu confirmation button K5 is pressed, the low level is input into the screen driving circuit 3 to perform screen menu operations and volume, brightness operations, etc.

[0059] In addition, indicator lights LED1 and LED2 are status indicators of the screen power supply, for example, LED1 is red and LED2 is green. When the screen power button K1 is pressed and the power is on without input signal, LED1 is red and lights up; when the screen power button K1 is released and the power is on with input signal, LED2 is green and lights up; when the power is off, both LED1 and LED2 are off.

[0060] like Figure 2 As shown, the control system of the KVM described in the present invention includes: at least two computer devices and the control device of the KVM.

[0061] The control device of the KVM mainly includes: a switching control board, including a switching switch control circuit, a USB switching switch and a display port switching switch; the USB switching switch and the display port switching switch are both connected to the switching switch control circuit; a key board, connected to the switching switch control circuit, and the key signal on the key board is transmitted to the switching switch control circuit; a screen driving circuit, respectively connected to the display port switching switch and the key board, and driven according to the state of the display port switching switch and the key signal on the key board; an LCD display screen, connected to the screen driving circuit; a USB interface, connected to the USB switching switch, and USB data transmission is performed according to the state of the USB switching switch.

[0062] The USB interface of the computer device is connected to the USB switch of the control device of the KVM.

[0063] Combination Figure 2The USB of the computer device PC1 is connected to the USB switching switch 12 of the control device of the KVM, the USB of the computer device PC2 is connected to the USB switching switch 12 of the control device of the KVM, the USB of the computer device PC3 is connected to the USB switching switch 12 of the control device of the KVM, and the USB of the computer device PC4 is connected to the USB switching switch 12 of the control device of the KVM.

[0064] The display port of the computer device is connected to the display port switch of the control device of the KVM.

[0065] Combination Figure 2 The display port DP (DisplayPort) of the computer device PC1 is connected to the display port switching switch 13 of the KVM control device, the display port DP of the computer device PC2 is connected to the display port switching switch 13 of the KVM control device, the display port DP of the computer device PC3 is connected to the display port switching switch 13 of the KVM control device, and the display port DP of the computer device PC4 is connected to the display port switching switch 13 of the KVM control device.

[0066] In practical applications, the computer devices are at least two hosts in a DCS (Distributed Control System).

[0067] DCS is a multi-level computer system composed of process control level and process monitoring level with communication network as the link. It integrates 4C technologies such as computer, communication, display and control. Its basic idea is decentralized control, centralized operation, hierarchical management, flexible configuration and convenient configuration. For example, DCS as a distributed operating system can be applied to nuclear power plant control systems.

[0068] like Figure 5As shown, the screen of the LCD display screen 4 is connected to the display screen control MCU (Microcontroller Unit, microcontroller unit or single chip microcomputer), and the display screen control MCU is input through DP and HDMI (High Definition Multimedia Interface, high definition multimedia interface), and outputs to the screen through EDP on the one hand, and outputs audio signals to the speaker through the power amplifier circuit on the other hand, so as to make sounds in accordance with the display screen. The display screen control MCU is externally connected to the OSD keypad and indicator light. In addition, the display screen control MCU needs to be connected to multiple power supplies, and multiple power supplies can be stepped down from DC12V to 5V, and then stepped down to various power supplies with different values ​​through DC5V. Specifically, it includes: 5DVCC stepped down to 3.3V (3.3DVCC, V33S), 5DVCC stepped down to 1.1V (V11S_OFF), 5DVCC stepped down to 2.5V (DDR2_VDD), and 5DVCC stepped down to 1.1V (V11S_ON).

[0069] The descriptions of the processes or structures corresponding to the above-mentioned figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0070] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A KVM control device, characterized in that: It includes a switching control board, a switching switch control circuit, a key board, a screen driving circuit, an LCD display screen, a USB interface, a USB switching switch and a display port switching switch; the USB switching switch and the display port switching switch are both connected to the switching switch control circuit; The keypad is connected to the switch control circuit, and the key signal on the keypad is transmitted to the switch control circuit; The screen driving circuit is connected to the display port switching switch and the key board respectively, and is driven according to the state of the display port switching switch and the key signal on the key board; The LCD display screen is connected to the screen driving circuit; The USB interface is connected to the USB switch, and USB data transmission is performed according to the state of the USB switch.

2. A KVM control device as claimed in claim 1, characterized in that: The keypad includes an input channel selection key and an OSD menu control key; the input channel selection key and the OSD menu control key are both connected to the switching switch control circuit, and the key signals of the input channel selection key and the OSD menu control key are transmitted to the switching switch control circuit; the OSD menu control key is also connected to the screen driving circuit, and the key signal of the OSD menu control key is transmitted to the screen driving circuit.

3. A KVM control device as claimed in claim 2, characterized in that: It also includes an indicator light module, which includes a first indicator light, a second indicator light, a third indicator light and a fourth indicator light; the input channel selection button includes a first button, a second button, a third button and a fourth button; when the first button is pressed, the first indicator light is lit, indicating that the currently used device is switched to the first computer device; when the second button is pressed, the second indicator light is lit, indicating that the currently used device is switched to the second computer device; when the third button is pressed, the third indicator light is lit, indicating that the currently used device is switched to the third computer device; when the fourth button is pressed, the fourth indicator light is lit, indicating that the currently used device is switched to the fourth computer device.

4. A KVM control device as claimed in claim 2, characterized in that: The OSD menu control buttons include a screen power button, a menu return button, a volume adjustment button, a brightness adjustment button and a menu confirmation button.

5. The KVM control device according to claim 1, characterized in that: It also includes a buzzer, which is connected to the switch control circuit.

6. A KVM control device as claimed in claim 1, characterized in that: It also includes a speaker, which is connected to the screen driving circuit.

7. A KVM control device as claimed in claim 1, characterized in that: The LCD display screen is connected to the external power supply, and the external power supply refers to direct current generated by power conversion from the mains.

8. A KVM control device as claimed in claim 1, characterized in that: It also includes a USB device, which is connected to the USB interface.

9. A KVM control device as claimed in claim 8, characterized in that: The USB device includes at least one of a USB keyboard, a USB mouse or a USB 2.0 device.

10. A KVM control system, characterized in that: It comprises at least two computer devices and the KVM control device as described in claims 1-9; the USB interface of the computer device is connected to the USB switching switch of the KVM control device; the display port of the computer device is connected to the display port switching switch of the KVM control device.

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