Interface hot plug protection system, implementation method thereof and communication terminal

Abstract

The invention discloses an interface hot plug protection system and an implementation method thereof, and a communication terminal, and the system comprises a load unit which is connected to a first DVI interface of a display end and is used for outputting a load detection voltage; and the hot plug detection unit is connected to a second DVI interface of the host end and is used for designing a detection voltage interval so as to judge whether the load detection voltage is in the detection voltage interval or not, and hot plug protection is carried out according to a judgment result. According to the invention, a pin is designed at the DVI interface of the host end and the display end for hot plug detection, the accurate and effective hot plug protection of the interface is realized by utilizing the load impedance characteristic of the detected unit and according to the load detection voltage of the load unit in the detection voltage interval, and the circuit can be widely applied to the technical field of circuits.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circuit technology, and particularly to an interface hot plug protection system and an implementation method thereof, and a communication terminal. BACKGROUND

[0002] The communication terminal is widely used in fire fighting, army, railway and other fields. The terminal is composed of a host and a display screen which are two independent components. The host and the display screen are connected by a DVI cable with self-defined signals to realize power supply of the display screen by the host and other signal transmission functions. The DVI interface of the communication terminal contains DC 12V and other low-voltage differential signals (such as LVDS display signals and USB signals, etc.). Since the DVI cable plug all adopts male heads, when the DVI cable plug which has been connected with the host is hot plugged with the display screen interface, the pins inside the plug have a probability of touching the metal shell of the display screen DVI interface to cause a short circuit. When the pins contain DC 12V and low-voltage high-speed signals, the low-voltage high-speed signal driving chip of the host will be overvoltage burned. SUMMARY

[0003] To solve the above technical problems, the purpose of the present application is to provide an accurate and effective interface hot plug protection system and an implementation method thereof, and a communication terminal.

[0004] To achieve the above purpose, one aspect of the embodiment of the present application provides an interface hot plug protection system applied to a communication terminal. The communication terminal includes a host end and a display end. The host end and the display end are connected by a DVI cable, and the interface hot plug protection system includes:

[0005] A load unit connected to a first DVI interface of the display end, used for outputting a load detection voltage.

[0006] A hot plug detection unit connected to a second DVI interface of the host end, used for designing a detection voltage interval, and then judging whether the load detection voltage is in the detection voltage interval, and performing hot plug protection according to the judgment result.

[0007] In some embodiments, the load unit includes:

[0008] A load resistor connected with the first DVI interface, used for outputting the load detection voltage.

[0009] A power input end connected with the first DVI interface, used for supplying power to the display end.

[0010] In some embodiments, the hot plug detection unit includes:

[0011] The voltage divider and detection module is connected to the second DVI interface. It is used to design the detection voltage range, compare the load detection voltage with the detection voltage range, and output a first logic level.

[0012] A delay control module, which is connected to the voltage divider and detection module, is used to delay the power-on time of the power supply or turn off the power supply instantaneously according to the first logic level, and output a power drive signal.

[0013] A power drive module, which is connected to the delay control module, is used to control the power output terminal to be turned on or off according to the power drive signal.

[0014] The power output terminal is connected to the power drive module and is used to supply power to the display terminal.

[0015] In some embodiments, the detection voltage range includes a first voltage threshold and a second voltage threshold, and the voltage divider and detection module includes:

[0016] The first voltage divider resistor and the second voltage divider resistor are used to design the first voltage threshold.

[0017] The third and fourth voltage divider resistors are used to design the second voltage threshold.

[0018] A first comparator and a second comparator are used. The first input terminal of the first comparator is connected between the first voltage divider resistor and the second voltage divider resistor. The first input terminal of the second comparator is connected between the third voltage divider resistor and the fourth voltage divider resistor. The second input terminals of both the first and second comparators are connected to the second DVI interface. They are used to determine whether the load detection voltage is within the first voltage threshold and the second voltage threshold, respectively, and output the first logic level.

[0019] In some embodiments, the delay control module includes:

[0020] A first logic gate, connected to the voltage divider and detection module, is used to output a second logic level based on the first logic level.

[0021] A first resistor, a first transistor, and a first capacitor, wherein one end of the first resistor and the first transistor are both connected to the first logic gate, and the other end of the first resistor and the first transistor are both connected to the first capacitor, for charging the first capacitor through the first resistor to delay the power-on time of the power output terminal, or discharging the first capacitor through the first transistor to instantaneously disconnect the power output terminal.

[0022] A second logic gate, the first resistance, the first transistor and the first capacitor are connected with the second logic gate, for outputting the power driving signal according to the second logic level.

[0023] In some embodiments, the load resistance is 39KΩ.

[0024] In some embodiments, the first voltage threshold is 2.2V, and the second voltage threshold is 2.8V.

[0025] To achieve the above object, another aspect of the embodiment of the present application provides an implementation method of an interface hot plug protection system, which is implemented by the interface hot plug protection system as described above, and includes the following steps:

[0026] Outputting a load detection voltage by a load unit;

[0027] Designing a detection voltage interval by a hot plug detection unit, and then judging whether the load detection voltage is in the detection voltage interval or not, and performing hot plug protection according to the judgment result.

[0028] In some embodiments, the designing of the detection voltage interval by the hot plug detection unit, and then the judging of whether the load detection voltage is in the detection voltage interval or not, and the performing of the hot plug protection according to the judgment result, specifically includes:

[0029] Designing the detection voltage interval by the hot plug detection unit;

[0030] When the host end and the display end are connected by a DVI cable, if the load detection voltage is in the detection voltage interval, delaying power-on time by the hot plug detection unit, and if the load detection voltage is not in the detection voltage interval, instantaneously turning off power by the hot plug detection unit;

[0031] When the host end and the display end are not connected by a DVI cable, if the load detection voltage is not in the detection voltage interval, keeping power off by the hot plug detection unit.

[0032] To achieve the above object, another aspect of the embodiment of the present application provides a communication terminal, which includes:

[0033] A host end, a display end and an interface hot plug protection system as described above.

[0034] The beneficial effects of the present application are: the interface hot plug protection system and the implementation method thereof and the communication terminal provided by the present application are applied to the communication terminal, the communication terminal comprises a host end and a display end, the host end and the display end are connected through a DVI cable, and the interface hot plug protection system comprises: a load unit, which is used for outputting a load detection voltage; a hot plug detection unit, which is used for designing a detection voltage interval, and then judging whether the load detection voltage is in the detection voltage interval, and performing hot plug protection according to the judgment result. The present application designs a pin for hot plug detection at the DVI interface of the host end and the display end, utilizes the load impedance characteristics of the detected unit, and according to whether the load detection voltage of the load unit is in the detection voltage interval, the precise and effective hot plug protection of the interface is realized, and the structure is small and simple. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following introduces the drawings needed to be used in the embodiments of the present application. It should be understood that the drawings introduced below are only for facilitating the clear description of some embodiments in the technical solutions of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor on the basis of these drawings.

[0036] Figure 1 The structural block diagram of the interface hot plug protection system provided by an embodiment of the present application is shown in the figure.

[0037] Figure 2 The structural block diagram of the hot plug detection unit provided by an embodiment of the present application is shown in the figure.

[0038] Figure 3 The circuit principle diagram of the hot plug detection unit provided by an embodiment of the present application is shown in the figure.

[0039] Figure 4 The circuit principle diagram of the load unit provided by an embodiment of the present application is shown in the figure.

[0040] Figure 5 The overall structural schematic diagram of the interface hot plug protection system provided by an embodiment of the present application is shown in the figure.

[0041] Figure 6 The step flow chart of the implementation method of the interface hot plug protection system provided by an embodiment of the present application is shown in the figure.

[0042] The figure mark: U1-A, first comparator; U1-B, second comparator; R3, first resistor; R5, second voltage dividing resistor; R1, third voltage dividing resistor; R2, fourth voltage dividing resistor; U2, first logic gate; U3, second logic gate; R9, first resistor; C2, first capacitor; D1, transistor; Q1, triode; U4, MOS tube. DETAILED DESCRIPTION

[0043] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in details below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with embodiments of the present application. They are merely examples of apparatuses and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0044] It can be understood that the terms "first", "second", and the like used in the present application can be used herein to describe various concepts, but unless specifically stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "when" or "in response to determining".

[0045] The terms "at least one", "multiple", "each", "any" and the like used in the present application include one, two or more than two, multiple includes two or more than two, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0046] The communication terminal is widely used in fire fighting, army, railway and other fields. The terminal is composed of a host and a display screen which are two independent components. The two are connected by a self-defined DVI cable to realize power supply of the host to the display screen and other signal transmission functions. The DVI interface of the communication terminal contains DC 12V and other low-voltage differential signals (such as LVDS display signals and USB signals, etc.). Since the DVI cable plug adopts a male head, when the DVI cable plug connected with the host is hot-plugged with the display screen interface, the pins inside the plug have a probability of touching the metal shell of the display screen DVI interface to cause a short circuit. When these pins contain DC 12V and low-voltage high-speed signals, it will cause the low-voltage high-speed signal driving chip of the host to be over-voltage burned.

[0047] To this end, the embodiment of the present application provides an interface hot plug protection system, which is applied to a communication terminal, the communication terminal comprises a host end and a display end, the host end and the display end are connected through a DVI cable, and the interface hot plug protection system comprises a load unit, a hot plug detection unit and a delay control circuit.

[0048] With reference to Figure 1 , Figure 1 The interface hot plug protection system is applied to a communication terminal, the communication terminal comprises a host end and a display end, the host end and the display end are connected through a DVI cable, and the interface hot plug protection system comprises:

[0049] The load unit is connected to a first DVI interface of the display end and is used for outputting a load detection voltage;

[0050] The hot plug detection unit is connected to a second DVI interface of the host end and is used for designing a detection voltage interval, and then judging whether the load detection voltage is in the detection voltage interval, and performing hot plug protection according to a judgment result.

[0051] Specifically, the embodiment of the present application designs a pin for hot plug detection in the DVI interface of the host end and the display end, utilizes the load impedance characteristics of the detected unit, and realizes real-time monitoring of the load detection voltage of the load unit through the hot plug detection unit. When the detection voltage is in a preset detection voltage interval, the delay control circuit is triggered to buffer, so as to ensure that the power supply is turned on after the connection is stable; when the detection voltage is abnormal, the power supply is immediately cut off, and accurate and effective hot plug protection is realized for the DVI interface.

[0052] With reference to Figure 2 , Figure 2 The hot plug detection unit is applied to the embodiment of the present application, and further serves as an optional implementation manner, and the hot plug detection unit comprises:

[0053] The voltage division and detection module is connected with the second DVI interface and is used for designing the detection voltage interval and comparing the load detection voltage with the detection voltage interval, and outputting a first logic level;

[0054] The delay control module is connected with the voltage division and detection module and is used for delaying the power-on time or instantaneously cutting off the power supply according to the first logic level, and outputting a power supply driving signal.

[0055] a power supply driving module, connected with the delay control module, for controlling the power supply output terminal to be turned on or turned off according to the power supply driving signal;

[0056] a power supply output terminal, connected with the power supply driving module, for supplying power to the display terminal.

[0057] Specifically, the voltage dividing and detecting module is configured to set a detection voltage interval through a resistor voltage dividing network, and to monitor a load detection voltage of the load unit in real time, compare whether the load detection voltage is located in the set detection voltage interval, and output a high / low first logic level to indicate whether the load is valid.

[0058] The delay control module is configured to, after receiving the first logic level, realize a delay power-on when the load is valid, or realize a millisecond-level power-off by quickly discharging when the load is abnormal, to obtain a delayed power supply driving signal.

[0059] The power supply driving module is configured to control the turning on / off of the triode and the MOS tube according to the delayed power supply driving signal, to realize intelligent switching of the 12V power supply.

[0060] The power supply output terminal is a 12V power supply port controlled by the MOS tube, configured to provide stable power supply for the display terminal, and only turned on after the load is compliant and the delay is over.

[0061] Reference Figure 3 , Figure 3 The circuit principle diagram of the hot plug detection unit provided by an embodiment of the present application is further provided as an optional implementation, the detection voltage interval includes a first voltage threshold and a second voltage threshold, and the voltage dividing and detecting module includes:

[0062] a first voltage dividing resistor R3 and a second voltage dividing resistor R5, configured to design the first voltage threshold;

[0063] a third voltage dividing resistor R1 and a fourth voltage dividing resistor R2, configured to design the second voltage threshold;

[0064] a first comparator U1-A and a second comparator U1-B, a first input end of the first comparator U1-A is connected between the first voltage dividing resistor R3 and the second voltage dividing resistor R5, a first input end of the second comparator U1-B is connected between the third voltage dividing resistor R1 and the fourth voltage dividing resistor R2, and second input ends of the first comparator U1-A and the second comparator U1-B are both connected with the second DVI interface, and are respectively configured to judge whether the load detection voltage is within the first voltage threshold and the second voltage threshold, and output a first logic level.

[0065] Further, as an optional implementation, the first voltage threshold is 2.2V, and the second voltage threshold is 2.8V.

[0066] In some alternative embodiments, the present embodiments provide two voltage comparators, including a first comparator U1-A and a second comparator U1-B, which can be selected from LM239D type comparators. According to the specification of the LM239D type comparator, the input bias current I BIAS of the comparator is 25nA, when the voltage V IN of one input end of the comparator is 2.5V, the input impedance Z IN(DC) of the comparator can be calculated by the following formula:

[0067] Z IN(DC) =V IN / I BIAS =2.5V / 25nA=100MΩ;

[0068] It can be seen that the input impedance is much larger than the voltage dividing resistors (i.e., the first voltage dividing resistor R3, the second voltage dividing resistor R5, the third voltage dividing resistor R1 and the fourth voltage dividing resistor R2) of the input end of the comparator, which can be ignored. Therefore, the negative first voltage threshold of the first comparator U1-A can be set to 2.2V by voltage dividing of the first voltage dividing resistor R3 and the second voltage dividing resistor R5, and the input positive second voltage threshold of the second comparator U1-B can be set to 2.8V by voltage dividing of the third voltage dividing resistor R1 and the fourth voltage dividing resistor R2.

[0069] It can be understood that the present embodiments limit the detection voltage range of the effective detection by using multiple voltage comparators, and the first voltage threshold and the second voltage threshold can be flexibly adjusted according to actual application needs, for example, the first voltage threshold is set to 1.5V or 2.5V, and the second voltage threshold is set to 3.0V or 3.3V.

[0070] Referring to Figure 3 , further as an alternative implementation, the delay control module comprises:

[0071] a first logic gate U2, which is connected with the voltage dividing and detection module, and is configured to output a second logic level according to a first logic level;

[0072] a first resistor R9, a first transistor D1 and a first capacitor C2, one end of the first resistor R9 and one end of the first transistor D1 are both connected with the first logic gate U2, the other end of the first resistor R9 and the other end of the first transistor D1 are both connected with the first capacitor C2, and the first resistor R9 and the first transistor D1 are configured to charge the first capacitor C2 through the first resistor R9 to delay the power-on time of the power output end, or discharge the first capacitor C2 through the first transistor D1 to instantaneously disconnect the power output end;

[0073] The second logic gate U3, the first resistor R9, the first transistor D1 and the first capacitor C2 are connected with the second logic gate U3, and are used for outputting the power supply driving signal according to the second logic level.

[0074] Further, as shown in the figure, Figure 3 The power supply driving module comprises a transistor Q1 and a MOS tube U4.

[0075] In some optional embodiments, when the load resistance connected to the second DVI interface pin 19 of the host end is in the range of 30KΩ-52KΩ, the input positive terminal detection voltage of the first comparator U1-A is greater than 2.2V and the output negative terminal detection voltage of the second comparator U1-B is less than 2.8V, the first logic level output by the first comparator U1-A and the second comparator U1-B is high, the second logic level output by the first logic gate U2 is high, the power supply driving signal output by the second logic gate U3 after passing through the charging circuit composed of the first resistor R9 and the first capacitor C2 becomes high. The transistor Q1 becomes a conducting state, the MOS tube U4 is driven to be turned on, and the 12V output is turned on. The first logic gate U2 can be selected as an AND gate of NC7S08P5X type. It can be known from the AND gate NC7S08P5X specification book that the minimum input high level threshold is 0.7Vcc, so the charging time t can be calculated by the following formula, and the value is the delay power-on time after the host end and the display end DVI interface are connected:

[0076] t = -RCln(1-V t / Vcc) = -220 × 10 3 × 22 × 10 -6 × ln(1-0.7) = 5.8s;

[0077] When the load resistance connected to the second DVI interface pin 19 of the host end is less than 30KΩ, the first logic level output by the first comparator U1-A is low, the first logic level output by the second comparator U1-B is high, the second logic level output by the first logic gate U2 is low, the power supply driving signal output by the second logic gate U3 is low, the transistor Q1 becomes a cut-off state, the MOS tube U4 is cut off, and the 12V output is turned off.

[0078] When the second DVI interface pin 19 of the host end is floating or the load resistance connected thereto is greater than 52KΩ, the first logic level output by the first comparator U1-A is high, the first logic level output by the second comparator U1-B is low, the second logic level output by the first logic gate U2 is low, the power supply driving signal output by the second logic gate U3 is low, the transistor Q1 becomes a cut-off state, the MOS tube U4 is cut off, and the 12V output is turned off.

[0079] Referring to Figure 4, Figure 4 The circuit schematic of the load unit provided by an embodiment of the present application is further provided as an optional implementation, and the load unit comprises:

[0080] A load resistor, which is connected with the first DVI interface, is used for outputting a load detection voltage;

[0081] A power input end, which is connected with the first DVI interface, is used for supplying power for the display end.

[0082] Further, as an optional implementation, the resistance of the load resistor is 39KΩ.

[0083] In some optional embodiments, the load unit comprises a 12V input and a load resistor, and the load resistor R12 is set to 39KΩ according to the need of the hot plug detection of the host. The high-precision resistor with a precision of ±1% is used as the hot plug detection load in the embodiment of the present application, which can reliably trigger the hot plug detection and avoid excessive power loss. Meanwhile, the cooperation of the 12V input and the load resistor realizes the integration of the power supply and the detection, and simplifies the interface circuit structure.

[0084] Based on the structure of the interface hot plug protection system provided by the embodiment of the present application, the working principle of the interface hot plug protection system is described below.

[0085] As shown in Figure 5 the overall structure schematic of the interface hot plug protection system, when the host end and the display end are connected through the DVI cable, the DVI interface hot plug detection pins 19 of the host end and the display end are connected, at this time, the voltage detected by the hot plug detection unit of the host end is in the effective detection voltage interval, and the 12V output power supply is turned on to supply power for the display screen; when the DVI interfaces of the host and the display screen are disconnected, the voltage detected by the hot plug detection unit of the host is not in the effective detection voltage interval, the output end of the first logic gate U2 instantaneously changes from high level to low level, and the first capacitor C2 can be quickly discharged through the first transistor D1, so as to ensure that the delay control during the fast hot plug can take effect; when the host end and the display end are not connected through the DVI cable, the load resistors detected by the host end are not in the effective detection voltage interval, at this time, the 12V output power supply is in an off state, which can effectively avoid the device burnout problem caused by the hot plug of the DVI interfaces of the host end and the display end.

[0086] The structure and working principle of the interface hot plug protection system of the embodiment of the present application are described above, and it can be recognized that the embodiment of the present application has the following advantages:

[0087] One, the effective detection voltage interval is limited by using multiple voltage comparators, the detection parameters can be flexibly adjusted according to actual application needs, and whether the load detection voltage of the load unit is in the detection voltage interval is judged, when the detection voltage is in the preset detection voltage interval, the delay control circuit is triggered to buffer, and it is ensured that the power supply is turned on after stable connection; when the detection voltage is abnormal, the power supply is immediately cut off, the accurate and effective hot plug protection of the DVI interface is realized, and the service life of the communication terminal is improved.

[0088] Two, a high-precision resistor is used as a hot plug detection load, so that only the load resistance of the hot plug detection pin of the DVI interface of the display end can meet the effective condition of hot plug detection, and when the pin of the DVI interface of the host end or the display end and other parts of the equipment are miscontacted, the effective condition of hot plug detection cannot be met, and the interface circuit structure is simple.

[0089] Reference Figure 6 , Figure 6 The step flow chart of the implementation method of the interface hot plug protection system provided by the embodiment of the application, the embodiment of the application provides an implementation method of an interface hot plug protection system, which is used for being realized through the interface hot plug protection system as described above, and includes but is not limited to the following steps S101 and S102:

[0090] S101, outputting a load detection voltage through a load unit;

[0091] S102, designing a detection voltage interval through a hot plug detection unit, and then judging whether the load detection voltage is in the detection voltage interval, and performing hot plug protection according to the judgment result.

[0092] As a further optional implementation, the step of designing a detection voltage interval through a hot plug detection unit, and then judging whether the load detection voltage is in the detection voltage interval, and performing hot plug protection according to the judgment result can be further divided into the following steps S1011 to S1013:

[0093] S1011, designing a detection voltage interval through a hot plug detection unit;

[0094] S1012, when the host end and the display end are connected through a DVI cable, if the load detection voltage is in the detection voltage interval, delaying the power-on time of the power supply through the hot plug detection unit, and if the load detection voltage is not in the detection voltage interval, instantaneously turning off the power supply through the hot plug detection unit;

[0095] S1013, when the host end and the display end are not connected through a DVI cable, if the load detection voltage is not in the detection voltage interval, keeping the power supply off through the hot plug detection unit.

[0096] Specifically, refer toFigure 5 When the host end and the display end are connected through the DVI cable, the DVI interface hot plug detection pins 19 of the host end and the display end are connected, at this time, the voltage detected by the hot plug detection unit of the host end is in the effective detection voltage interval, the 12V output power supply is turned on to supply power to the display screen; when the DVI interfaces of the host and the display screen are disconnected, the voltage detected by the hot plug detection unit of the host is not in the effective detection voltage interval, the output end of the first logic gate U2 is instantaneously changed from high level to low level, the first capacitor C2 can be quickly discharged through the first transistor D1, so as to ensure that the delay control can take effect during fast hot plug; when the host end and the display end are not connected through the DVI cable, the load resistances detected by the host end are not in the effective detection voltage interval, at this time, the 12V output power supply is in an off state, which can effectively avoid the device burning problem caused by the hot plug of the DVI interfaces of the host end and the display end.

[0097] The contents in the interface hot plug protection system embodiments are all applicable to the implementation method embodiments of the interface hot plug protection system, the functions realized by the implementation method embodiments of the interface hot plug protection system are the same as those of the interface hot plug protection system embodiments, and the beneficial effects achieved by the implementation method embodiments of the interface hot plug protection system are also the same as those of the interface hot plug protection system embodiments.

[0098] The embodiment of the application further provides a communication terminal, comprising a host end, a display end and the interface hot plug protection system.

[0099] It should be appreciated that the embodiments of the application can be realized or implemented by computer hardware, a combination of hardware and software, or through computer instructions stored in a non-transitory computer readable storage medium. The above method can be realized in a computer program using standard programming techniques, including a non-transitory computer readable storage medium configured with a computer program, wherein the storage medium thus configured causes a computer to operate in a specific and predefined manner according to the method described in the specific embodiments and the accompanying drawings. Each program can be implemented in a high-level procedural or object-oriented programming language to communicate with a computer system. However, if necessary, the program can be implemented in assembly or machine language. In any case, the language can be a compiled or interpreted language. In addition, the program can be run on a programmed special integrated circuit for this purpose.

[0100] Further, the operations of the processes described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described herein (or variations and / or combinations thereof) can be implemented under the control of one or more computer systems configured with executable instructions (e.g., computer programs, one or more computer programs, or one or more applications) to perform the functionality described herein, and can be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) executing collectively on one or more processors, by hardware, or combinations thereof. The computer programs described above, include machine code, machine language, machine instructions, and / or machine executable instructions.

[0101] Further, the methods described above can be implemented in any suitable type of computing platform that is operatively coupled to any suitable type of computing platform, including, but not limited to, a personal computer, a mini-computer, a mainframe, a workstation, a network or distributed computing environment, a stand-alone or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the present application can be implemented in machine readable code stored on a non-transitory storage medium or device, whether removable or integrated to the computing platform, such as a hard disk, an optical read and / or write storage medium, RAM, ROM, and the like, such that it can be read by a programmable computer to configure and operate the computer to perform the processes described herein when the storage medium or device is read by the computer. Further, the machine readable code, or portions thereof, can be transmitted over a wired or wireless network. The present application described herein includes these and other different types of non-transitory computer readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The present application also includes the computer itself when programmed in accordance with the methods and techniques described in the present application.

[0102] The computer programs can be applied to input data to perform the functions described herein to transform the input data to generate output data that is stored to non-volatile memory. The output information can also be applied to one or more output devices, such as a display. In a preferred embodiment of the present application, the transformed data represents a physical and tangible object, including a specific visual depiction of the physical and tangible object produced on a display.

[0103] In the above description of the present specification, reference has been made to descriptive terms, such as "one embodiment," "another embodiment," "some embodiments," or "an embodiment," etc., which can describe a specific feature, structure, material, or characteristic in connection with an embodiment or example. The descriptive terms should not be construed that all embodiments or examples incorporating such specific feature, structure, material, or characteristic are identical or that they are necessarily the same, unless the context clearly dictates otherwise. Also, the specific feature, structure, material, or characteristic being described can be combined in any suitable manner in one or more embodiments or examples.

[0104] While the embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary and are not to be construed as limiting the scope of the application. The scope of the application is defined by the appended claims and their equivalents.

[0105] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the embodiment, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. An interface hot-swap protection system, applied to a communication terminal, the communication terminal including a host end and a display end, the host end and the display end being connected via a DVI cable, characterized in that, include: A load unit, which is connected to the first DVI interface of the display terminal, is used to output a load detection voltage; A hot-swap detection unit is connected to the second DVI interface on the host side. It is used to design a detection voltage range and then determine whether the load detection voltage is within the detection voltage range. Based on the determination result, hot-swap protection is performed.

2. The interface hot-swap protection system according to claim 1, characterized in that, The load unit includes: A load resistor, which is connected to the first DVI interface, is used to output the load detection voltage; A power input terminal is connected to the first DVI interface and is used to supply power to the display terminal.

3. The interface hot-swap protection system according to claim 1, characterized in that, The hot-plug detection unit includes: The voltage divider and detection module is connected to the second DVI interface. It is used to design the detection voltage range, compare the load detection voltage with the detection voltage range, and output a first logic level. A delay control module, which is connected to the voltage divider and detection module, is used to delay the power-on time of the power supply or turn off the power supply instantaneously according to the first logic level, and output a power drive signal. A power drive module, which is connected to the delay control module, is used to control the power output terminal to be turned on or off according to the power drive signal. The power output terminal is connected to the power drive module and is used to supply power to the display terminal.

4. The interface hot-swap protection system according to claim 3, characterized in that, The detection voltage range includes a first voltage threshold and a second voltage threshold, and the voltage divider and detection module includes: The first voltage divider resistor and the second voltage divider resistor are used to design the first voltage threshold. The third and fourth voltage divider resistors are used to design the second voltage threshold. A first comparator and a second comparator are used. The first input terminal of the first comparator is connected between the first voltage divider resistor and the second voltage divider resistor. The first input terminal of the second comparator is connected between the third voltage divider resistor and the fourth voltage divider resistor. The second input terminals of both the first and second comparators are connected to the second DVI interface. They are used to determine whether the load detection voltage is within the first voltage threshold and the second voltage threshold, respectively, and output the first logic level.

5. The interface hot-swap protection system according to claim 3, characterized in that, The delay control module includes: A first logic gate, connected to the voltage divider and detection module, is used to output a second logic level based on the first logic level. A first resistor, a first transistor, and a first capacitor, wherein one end of the first resistor and one end of the first transistor are connected to the... The first logic gate is connected, and the other end of the first resistor and the first transistor are both connected to the first capacitor. This is used to charge the first capacitor through the first resistor to delay the power-on time of the power output terminal, or to discharge the first capacitor through the first transistor to instantly disconnect the power output terminal. The second logic gate, in which the first resistor, the first transistor, and the first capacitor are all connected, is used to output the power drive signal according to the second logic level.

6. The interface hot-plug protection system according to claim 2, characterized in that, The resistance of the load resistor is 39KΩ.

7. The interface hot-swap protection system according to claim 4, characterized in that, The first voltage threshold is 2.2V, and the second voltage threshold is 2.8V.

8. A method for implementing an interface hot-swap protection system, used to implement the interface hot-swap protection system as described in any one of claims 1 to 7, characterized in that, Includes the following steps: The load detection voltage is output through the load unit; By using a hot-swap detection unit, a detection voltage range is designed to determine whether the load detection voltage is within the detection voltage range, and hot-swap protection is performed based on the determination result.

9. The method according to claim 8, characterized in that, The hot-swap detection unit is designed with a detection voltage range to determine whether the load detection voltage is within the detection voltage range, and hot-swap protection is performed based on the determination result. Specifically, this includes: The detection voltage range is designed using the hot-swap detection unit. When the host and display are connected via a DVI cable, if the load detection voltage is within the detection voltage range, the power-on time is delayed by the hot-swap detection unit; if the load detection voltage is not within the detection voltage range, the power is instantly shut off by the hot-swap detection unit. When the host and display are not connected via a DVI cable, if the load detection voltage is not within the detection voltage range, the power supply is kept off by the hot-swap detection unit.

10. A communication terminal, characterized in that, include: The host end, the display end, and the interface hot-swap protection system as described in any one of claims 1 to 7.

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