A type-c display interface control circuit, a display and a control method

Abstract

The application discloses a TypeC display interface control circuit, a display and a control method, which comprise a display control module, a PD protocol control module, a signal switching module, a key selection module and a TypeC interface module; the key selection module is connected with the display control module; the display control module is connected with the PD protocol control module and the signal switching module; the PD protocol control module is connected with the signal switching module; the TypeC interface module is connected with the protocol control module and the signal switching module; the key selection module acquires a key selection signal of a user; the display control module controls the PD protocol control module to switch to a high-resolution or high-speed communication mode according to the key selection signal; the PD protocol control module communicates with external equipment, selects lane number distribution of the TypeC interface module in a communication protocol according to the key selection signal, and controls the signal switching module and the display control module to switch to a corresponding mode. The application can be compatible with high-resolution video signals and USB high-speed communication, improve display performance and improve user experience.

Description

Technical Field

[0001] This invention relates to the field of display technology, and particularly to a Type-C display interface control circuit, a display, and a control method. Background Technology

[0002] USB Type-C is a USB interface standard with a smaller size than both Type-A and Type-B. It can be used with both PCs (host devices) and external devices (slave devices, such as mobile phones). USB Type-C has 4 pairs of TX / RX lines, 2 pairs of USB D+ / D- lines, 1 pair of SBU lines, 2 CC lines, 4 VBUS lines, and 4 ground lines. The CC line is primarily used for communication with the Power Delivery module (PD). The CC line primarily determines the device's insertion orientation: or reverse. If correctly inserted, the host uses CC1 to communicate with the device; if reversed, CC2 is used. The CC line uses a single-wire protocol. When DP is enabled, the SBU line acts as the AUX_P / AUX_N differential line in the DP protocol (its polarity can be modified according to the insertion orientation), responsible for transmitting key information such as the device's DPCD and EDID. Due to its ease of use, the USB Type-C interface is widely used in various smart devices.

[0003] With the widespread adoption of Type-C interface devices, the quantity and variety of Type-C cables are increasing daily. Due to the lane limitation of Type-C interfaces, in conventional monitor applications, the Type-C interface is either used to support USB 3.0 high-speed communication and low-resolution DisplayPort (DP) video signals, or it only supports USB 2.0 communication and high-resolution DisplayPort (DP) video signals. In other words, when a device has only one Type-C interface, it often can only run either high-resolution video signals or USB 3.0 high-speed communication, making it impossible to achieve compatibility between high-resolution video signals and USB 3.0 high-speed communication, thus degrading the user experience. Therefore, inventing a Type-C monitor interface control circuit that can be compatible with both high-resolution video signals and USB 3.0 high-speed communication is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a Type-C display interface control circuit, a display, and a control method. In this solution, the button selection module is used to acquire the user's button selection signal, and the display control module is used to control the PD protocol module to switch to high-resolution mode or high-speed communication mode according to the button selection signal. The PD protocol module communicates with external devices connected to the Type-C interface module, selects the lane number allocation of the Type-C interface module in the communication protocol according to the button selection signal, and controls the signal switching module and the display control module to switch to the corresponding mode state. Thus, this application can be compatible with high-resolution video signals and realize USB 3.0 high-speed communication, improve display performance, and enhance user experience.

[0005] To address the aforementioned technical problems, this application provides a Type-C display interface control circuit, including a display control module, a PD protocol control module, a signal switching module, a button selection module, and a Type-C interface module;

[0006] The button selection module is electrically connected to the display control module. The display control module is electrically connected to the PD protocol control module and the signal switching module. The PD protocol control module is electrically connected to the signal switching module. The Type-C interface module is electrically connected to the protocol control module and the signal switching module.

[0007] The button selection module is used to acquire the user's button selection signal, and the display control module is used to control the PD protocol module to switch to high-resolution mode or high-speed communication mode according to the button selection signal.

[0008] The PD protocol module communicates with external devices connected to the TypeC interface module, selects the lane number allocation of the TypeC interface module in the communication protocol according to the button selection signal, and controls the signal switching module and the display control module to switch to the corresponding mode state.

[0009] Preferably, the Type-C display interface control circuit further includes a USB expansion module;

[0010] The USB expansion module is electrically connected to the signal switching module and the Type-C interface module, respectively.

[0011] Preferably, the signal switching module includes a signal switcher, a mode selection unit, a status control unit, and a signal output unit;

[0012] The signal switcher is electrically connected to the mode selection unit, the status control unit and the signal output unit respectively;

[0013] The mode selection unit is electrically connected to the PD protocol control module, the status control unit is electrically connected to the input power supply, and the signal output unit is electrically connected to the display control module.

[0014] Preferably, the PD protocol control module includes a PD protocol control unit, an external output power switch unit, a current limiting unit, a buck drive oscillation unit, and a boost drive oscillation unit;

[0015] The external output power switch unit, the buck drive oscillation unit, and the boost drive oscillation unit are all electrically connected to the PD protocol control unit. The current limiting unit is electrically connected to the buck drive oscillation unit, and the external output power switch unit is electrically connected to the Type-C interface module.

[0016] Preferably, the mode selection unit includes a first resistor and a second resistor;

[0017] The first end of the first resistor is electrically connected to the mode selection pin of the PD protocol control module, the first end of the second resistor is grounded, and the second ends of both the first resistor and the second resistor are electrically connected to the mode selection pin of the signal switcher.

[0018] Preferably, the state control unit includes a third resistor, a fourth resistor, and a fifth resistor;

[0019] The first end of the third resistor is electrically connected to the operation control pin of the signal switcher, and the second end of the third resistor is electrically connected to the input power supply.

[0020] The first end of the fourth resistor is electrically connected to the IO pin of the signal switch, and the second end of the fourth resistor is electrically connected to the input power supply.

[0021] The first end of the fifth resistor is electrically connected to the mode selection pin of the signal switcher, and the second end of the fifth resistor is electrically connected to the input power supply.

[0022] Preferably, the external output power switch unit includes a first MOSFET, a sixth resistor, a first capacitor, and a second capacitor;

[0023] The drain of the first MOSFET is electrically connected to the first pin of the PD protocol control unit. The gate of the first MOSFET is electrically connected to the first end of the sixth resistor. The second end of the sixth resistor is electrically connected to the second pin of the PD protocol control unit. The source of the first MOSFET is electrically connected to the first end of the first capacitor, the first end of the second capacitor, and the Type-C interface module. The second end of the first capacitor is grounded, and the second end of the second capacitor is grounded.

[0024] Preferably, the buck drive oscillation unit includes a second MOSFET and a third MOSFET;

[0025] The drain of the second MOS transistor is electrically connected to the third pin of the PD protocol control unit, the gate of the second MOS transistor is electrically connected to the current limiting unit, the source of the second MOS transistor is electrically connected to the drain of the third MOS transistor, the gate of the third MOS transistor is electrically connected to the current limiting unit, and the source of the third MOS transistor is grounded.

[0026] To address the aforementioned technical problems, this application provides a display, including the aforementioned Type-C display interface control circuit.

[0027] To address the aforementioned technical problems, this application provides a Type-C display interface control method, applied to the aforementioned Type-C display interface control circuit, the control method comprising:

[0028] The button selection module is controlled to acquire the user's button selection signal;

[0029] The display control module controls the PD protocol module to switch to high-resolution mode or high-speed communication mode according to the button selection signal;

[0030] Controls the PD protocol module to communicate with external devices connected to the Type-C interface module;

[0031] Based on the button selection signal, the lane number allocation of the Type C interface module is selected in the communication protocol;

[0032] The signal switching module and the display control module are controlled to switch to the corresponding mode state.

[0033] The Type-C display interface control circuit, display, and control method disclosed in this invention have the following beneficial effects. The Type-C display interface control circuit includes: a display control module, a PD protocol control module, a signal switching module, a button selection module, and a Type-C interface module. The button selection module is electrically connected to the display control module, the display control module is electrically connected to both the PD protocol control module and the signal switching module, the PD protocol control module is electrically connected to the signal switching module, and the Type-C interface module is electrically connected to both the protocol control module and the signal switching module. The button selection module is used to acquire user button selection signals, and the display control module is used to control the PD protocol module to switch to a high-resolution mode or a high-speed communication mode based on the button selection signals. The PD protocol module communicates with external devices connected to the Type-C interface module, selects the lane allocation of the Type-C interface module in the communication protocol based on the button selection signals, and controls the signal switching module and the display control module to switch to the corresponding mode state. Therefore, this invention can be compatible with high-resolution video signals and realize USB 3.0 high-speed communication, improving display performance and enhancing user experience. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0035] Figure 1 This is a schematic block diagram of a Type-C display interface control circuit according to a preferred embodiment of the present invention;

[0036] Figure 2 This is a schematic block diagram of a Type-C display interface control circuit according to a preferred embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the VL170 internal switching to a high-resolution video signal in a preferred embodiment of the Type-C display interface control circuit of the present invention.

[0038] Figure 4 This is a schematic diagram of the VL170 internal switching to USB 3.0 high-speed communication in a Type-C display interface control circuit according to a preferred embodiment of the present invention.

[0039] Figure 5 This is a circuit diagram of a signal switching module of a Type-C display interface control circuit according to a preferred embodiment of the present invention.

[0040] Figure 6 This is a circuit schematic diagram of the PD protocol control module of a Type-C display interface control circuit according to a preferred embodiment of the present invention.

[0041] Figure 7 This is a flowchart illustrating a preferred embodiment of a Type-C display interface control method according to the present invention. Detailed Implementation

[0042] The core of this application is to provide a Type-C display interface control circuit, a display, and a control method. In this solution, the button selection module is used to acquire the user's button selection signal, and the display control module is used to control the PD protocol module to switch to high-resolution mode or high-speed communication mode according to the button selection signal. The PD protocol module communicates with external devices connected to the Type-C interface module, selects the lane number allocation of the Type-C interface module in the communication protocol according to the button selection signal, and controls the signal switching module and the display control module to switch to the corresponding mode state. Thus, this application can be compatible with high-resolution video signals and realize USB 3.0 high-speed communication, improve display performance, and enhance user experience.

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Please see Figure 1 , Figure 1 The schematic diagram of a Type-C display interface control circuit provided in this application includes a display control module 1, a PD protocol control module 2, a signal switching module 3, a button selection module 4, and a Type-C interface module 5;

[0045] The button selection module 4 is electrically connected to the display control module 1. The display control module 1 is electrically connected to the PD protocol control module 2 and the signal switching module 3 respectively. The PD protocol control module 2 is electrically connected to the signal switching module 3 respectively. The Type-C interface module 5 is electrically connected to the protocol control module and the signal switching module 3 respectively.

[0046] The button selection module 4 is used to acquire the user's button selection signal, and the display control module 1 is used to control the PD protocol module to switch to high resolution mode or high-speed communication mode according to the button selection signal.

[0047] The PD protocol module communicates with external devices connected to the TypeC interface module 5, selects the lane number allocation of the TypeC interface module 5 in the communication protocol according to the button selection signal, and controls the signal switching module 3 and the display control module 1 to switch to the corresponding mode state.

[0048] In the current technology, with the popularization of Type-C interface devices, the number and types of Type-C cables are increasing day by day. Due to the lane limitation of Type-C interface, in conventional display applications, the Type-C interface is either used to support USB 3.0 high-speed communication and low-resolution display DP video signals, or it only supports USB 2.0 communication and high-resolution display DP video signals. That is, when a device has only one Type-C interface, it can often only run high-resolution video signals or only run USB 3.0 high-speed communication, and it is impossible to achieve compatibility settings for high-resolution video signals and USB 3.0 high-speed communication, which reduces the user experience.

[0049] To address the aforementioned shortcomings, this application utilizes the cooperation of display control module 1, PD protocol control module 2, signal switching module 3, button selection module 4, and Type-C interface module 5 to achieve compatibility settings for high-resolution video signals and USB 3.0 high-speed communication, thereby improving display performance and enhancing user experience.

[0050] Specifically, this application sets up a signal switching module 3 to select the number of lanes. The user selects the current data bias of the Type C interface module 5 through the built-in menu on the display screen: high resolution or high-speed USB 3.0. When the display control module 1 receives the user's current selection, it switches the state of the signal switching module 3. When all 4 lanes are used for DP video signal communication, the internal edid of the signal switching module 3 is synchronously changed to the high resolution display format, and the Type C interface module 5 is used to receive high resolution images. When 2 lanes are used for DP video signal communication and 2 lanes are used for USB 3.0 signal communication, and the internal edid of the display control module 1 is synchronously changed to the low resolution display format, the Type C interface module 5 is used to support high-speed USB 3.0 communication.

[0051] Furthermore, when the display control module 1 receives the user's selection signal for the current mode of the Type-C interface module 5 through the button selection module 4, the display control module 1 controls the PD protocol control module 2 to switch to the corresponding mode via the high and low levels of the IO port. The PD protocol control module 2 will then re-communicate with the external device, selecting the lane allocation for the Type-C interface module 5 in the communication protocol. If the user selects the high-resolution image mode, all 4 lanes are used for DP video signal communication, and USB only supports 2.0. If the user selects the USB 3.0 mode, 2 lanes are used for DP video signal communication, and 2 lanes are used as USB 3.0 signal lines, supporting high-speed USB 3.0 signals. Simultaneously, the PD protocol control module 2 controls the switching signal to switch the state of the switching module 3 via the IO port, switching between 4-lane DP or 2-lane DP + 2-lane. USB; in addition, the internal edid of the display control module 1 will also change accordingly. In high resolution mode, the internal edid of the display control module 1 supports a maximum of 3840*2160_60hz; in USB 3.0 mode, the internal edid of the display control module 1 supports a maximum of 3840*2160_30hz or 1920*1080_60hz.

[0052] Specifically, in this embodiment, the chip model of the display control module 1 is set to RTD2795T. In another preferred embodiment, the chip model of the display control module 1 is not specifically limited.

[0053] In summary, this invention provides a Type-C display interface control circuit. This circuit includes a display control module 1, a PD protocol control module 2, a signal switching module 3, a button selection module 4, and a Type-C interface module 5. The button selection module 4 acquires user button selection signals, and the display control module 1 controls the PD protocol module to switch to either a high-resolution mode or a high-speed communication mode based on the button selection signals. The PD protocol module communicates with external devices connected to the Type-C interface module 5, selects the lane allocation for the Type-C interface module 5 in the communication protocol based on the button selection signals, and controls the signal switching module 3 and the display control module 1 to switch to the corresponding mode. Therefore, this invention is compatible with high-resolution video signals and enables USB 3.0 high-speed communication, improving display performance and enhancing the user experience.

[0054] Based on the above embodiments:

[0055] Please refer to Figure 2 , Figure 2 This is a schematic block diagram of a Type-C display interface control circuit provided in this application.

[0056] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the VL170 internal switching to a high-resolution video signal in a Type-C display interface control circuit provided in this application.

[0057] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the VL170 internal switching of a Type-C display interface control circuit to USB 3.0 high-speed communication, as provided in this application.

[0058] In one preferred embodiment, the Type-C display interface control circuit further includes a USB expansion module 6;

[0059] The USB expansion module 6 is electrically connected to the signal switching module 3 and the Type-C interface module 5, respectively.

[0060] Specifically, in this embodiment, the USB expansion module 6 is used to expand the functionality of the display's USB interface. In this embodiment, the USB interface can be expanded to four, and the expanded USB interfaces can be used to connect external USB devices such as USB flash drives, keyboards, and mice, without specific limitations.

[0061] Specifically, in this embodiment, the chip model of the USB expansion module is set to RTS5411. In another preferred embodiment, the chip model of the USB expansion module is not specifically limited.

[0062] Please refer to Figure 5 , Figure 5 The circuit diagram of the signal switching module of the Type-C display interface control circuit provided in this application.

[0063] In a preferred embodiment, the signal switching module 3 includes a signal switcher 31, a mode selection unit 32, a status control unit 33, and a signal output unit 34;

[0064] The signal switcher 31 is electrically connected to the mode selection unit 32, the status control unit 33 and the signal output unit 34 respectively;

[0065] The mode selection unit 32 is electrically connected to the PD protocol control module 2, the status control unit 33 is electrically connected to the input power supply, and the signal output unit 34 is electrically connected to the display control module 1.

[0066] Specifically, in this embodiment, the chip model of the signal switcher 31 is VL170. In another preferred embodiment, the chip model of the signal switching module 3 is not specifically limited.

[0067] In a preferred embodiment, the mode selection unit 32 includes a first resistor RD4 and a second resistor RD40;

[0068] The first end of the first resistor RD4 is electrically connected to the mode selection pin of the PD protocol control module 2, the first end of the second resistor RD40 is grounded, and the second ends of both the first resistor RD4 and the second resistor RD40 are electrically connected to the mode selection pin of the signal switcher 31.

[0069] Specifically, VL170 is powered by 3.3V, and AMSEL in mode selection unit 32 is connected to PD protocol module 2 to set a 2-lane or 4-lane selection pin for PD protocol module 2 control signal switching module 3.

[0070] In a preferred embodiment, the state control unit 33 includes a third resistor RD37, a fourth resistor RD38, and a fifth resistor RD39;

[0071] The first end of the third resistor RD37 is electrically connected to the operation control pin of the signal switcher 31, and the second end of the third resistor RD37 is electrically connected to the input power supply.

[0072] The first end of the fourth resistor RD38 is electrically connected to the IO pin of the signal switch 31, and the second end of the fourth resistor RD38 is electrically connected to the input power supply.

[0073] The first end of the fifth resistor RD39 is electrically connected to the mode selection pin of the signal switcher 31, and the second end of the fifth resistor RD39 is electrically connected to the input power supply.

[0074] Specifically, in this embodiment, the third resistor RD37 is a pull-up resistor, which makes the enable pin of VL170 high after power-on, and the chip is in the running state; the fourth resistor RD38 is a pull-up resistor, which pulls the POL_VL170 pin to a high level, and the default is positive output; the fifth resistor RD39 is a pull-up resistor, which pulls the AMSEL pin high, and the default is 4-lane mode.

[0075] Specifically, in this embodiment, the 4 lane signal pins of the signal output unit 34 are connected in series with a resistor and then connected to the display control module 1. The resistor is used to achieve voltage division and current limiting.

[0076] Please refer to Figure 6 , Figure 6 The circuit schematic diagram of the PD protocol control module of the Type-C display interface control circuit provided in this application.

[0077] In a preferred embodiment, the PD protocol control module 2 includes a PD protocol control unit 21, an external output power switch unit 22, a current limiting unit 23, a buck drive oscillation unit 24, and a boost drive oscillation unit 25;

[0078] The external output power switch unit 22, the buck drive oscillation unit 24, and the boost drive oscillation unit 25 are all electrically connected to the PD protocol control unit. The current limiting unit 23 is electrically connected to the buck drive oscillation unit 24. The external output power switch unit 22 is electrically connected to the Type-C interface module 5.

[0079] Specifically, in this embodiment, the chip model of the PD protocol control unit 21 is set to IP6559. In another preferred embodiment, the chip model of the PD protocol control unit 21 is not specifically limited.

[0080] In a preferred embodiment, the external output power switch unit 22 includes a first MOSFET Q18, a sixth resistor R260, a first capacitor C283, and a second capacitor EC3;

[0081] The drain of the first MOSFET Q18 is electrically connected to the first pin of the PD protocol control unit. The gate of the first MOSFET Q18 is electrically connected to the first end of the sixth resistor R260. The second end of the sixth resistor R260 is electrically connected to the second pin of the PD protocol control unit. The source of the first MOSFET Q18 is electrically connected to the first end of the first capacitor C283, the first end of the second capacitor EC3, and the Type-C interface module 5. The second end of the first capacitor C283 is grounded, and the second end of the second capacitor EC3 is grounded.

[0082] In one preferred embodiment, the buck drive oscillation unit 24 includes a second MOSFET Q2 and a third MOSFET Q1;

[0083] The drain of the second MOSFET Q2 is electrically connected to the third pin of the PD protocol control unit, the gate of the second MOSFET Q2 is electrically connected to the current limiting unit, the source of the second MOSFET Q2 is electrically connected to the drain of the third MOSFET Q1, the gate of the third MOSFET Q1 is electrically connected to the current limiting unit, and the source of the third MOSFET Q1 is grounded.

[0084] In a preferred embodiment, the boost drive oscillation unit 25 includes a fourth MOSFET Q6 and a fifth MOSFET Q10; the drain of the fourth MOSFET Q6 is electrically connected to the fourth pin of the PD protocol control unit, the gate of the fourth MOSFET Q6 is electrically connected to the fifth pin of the PD protocol control unit, the source of the fourth MOSFET Q6 is electrically connected to the drain of the buck drive oscillation unit 24 and the fifth MOSFET Q10, the gate of the fifth MOSFET Q10 is electrically connected to the sixth pin of the PD protocol control unit, and the source of the fifth MOSFET Q10 is grounded.

[0085] In a preferred embodiment, the current limiting unit 23 includes a seventh resistor R258 and an eighth resistor R259. The first terminal of the seventh resistor R258 is electrically connected to the gate of the second MOSFET Q2, and the second terminal of the seventh resistor R258 is electrically connected to the PD protocol control unit. The first terminal of the eighth resistor R259 is electrically connected to the gate of the third MOSFET, and the second terminal of the eighth resistor R259 is electrically connected to the PD protocol control unit.

[0086] Specifically, in this embodiment, the IP6559 is a protocol power integrated chip. The first MOSFET Q18 is used to control the on / off switching of the external output power. It will only turn on when the detected output voltage meets the external output requirements. When the 19VCC_IN input voltage is lower than 3.6V or higher than 31V, the first MOSFET Q18 will also turn off. Resistors R258 and R259 are connected in parallel as a 5mR current sensing resistor to adjust the output current limiting. The fourth MOSFET Q6 and the fifth MOSFET Q10 are used for buck driving oscillation. They are turned on when the required output voltage is lower than the input voltage. The second MOSFET Q2 and the third MOSFET Q1 are used for boost driving oscillation. When the required output voltage is higher than the input voltage, the fourth MOSFET Q6 and the fifth MOSFET Q10 are turned off, and the second MOSFET Q2 and the third MOSFET Q1 are turned on. R265 is a pull-down resistor used to stabilize the HPD input pin voltage. R273 is an NTC resistor whose resistance value changes with temperature and is used for temperature monitoring near the chip.

[0087] This application also provides a display, including the aforementioned Type-C display interface control circuit.

[0088] Please refer to Figure 7 , Figure 7 This is a flowchart illustrating a Type-C display interface control method provided in this application.

[0089] This application provides a Type-C display interface control method, applied to a Type-C display interface control circuit, the control method comprising:

[0090] S1. Control the key selection module 4 to obtain the user's key selection signal;

[0091] S2. Control the display control module 1 to switch the PD protocol module to high-resolution mode or high-speed communication mode according to the button selection signal;

[0092] S3. Control the PD protocol module to communicate with the external device connected to the TypeC interface module 5;

[0093] S4. Based on the button selection signal, select the lane number allocation of the Type C interface module 5 in the communication protocol;

[0094] S5. Control the signal switching module 3 and the display control module 1 to switch to the corresponding mode state.

[0095] In summary, this invention enables the display's Type-C interface to handle both high-resolution images and high-speed USB 3.0 signals, displaying high-resolution images when needed to improve display performance; it can also switch to USB 3.0 mode to increase file transfer speed, greatly enhancing display performance and providing a superior user experience.

[0096] For a description of the Type-C display interface control circuit provided in this application, please refer to the above embodiments; further details will not be repeated here.

[0097] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0098] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Type-C display interface control circuit, characterized in that, Includes a display control module, a PD protocol control module, a signal switching module, a button selection module, and a Type-C interface module; The button selection module is electrically connected to the display control module. The display control module is electrically connected to the PD protocol control module and the signal switching module. The PD protocol control module is electrically connected to the signal switching module. The Type-C interface module is electrically connected to the protocol control module and the signal switching module. The button selection module is used to acquire the user's button selection signal, and the display control module is used to control the PD protocol control module to switch to high resolution mode or high-speed communication mode according to the button selection signal. The PD protocol control module communicates with external devices connected to the TypeC interface module, selects the lane number allocation of the TypeC interface module in the communication protocol according to the button selection signal, and controls the signal switching module and the display control module to switch to the corresponding mode state. The PD protocol control module includes a PD protocol control unit, an external output power switch unit, a current limiting unit, a buck drive oscillation unit, and a boost drive oscillation unit; The external output power switch unit, the buck drive oscillation unit, and the boost drive oscillation unit are all electrically connected to the PD protocol control unit. The current limiting unit is electrically connected to the buck drive oscillation unit, and the external output power switch unit is electrically connected to the Type-C interface module.

2. The Type-C display interface control circuit according to claim 1, characterized in that, The Type-C display interface control circuit also includes a USB expansion module; The USB expansion module is electrically connected to the signal switching module and the Type-C interface module, respectively.

3. The Type-C display interface control circuit according to claim 1, characterized in that, The signal switching module includes a signal switcher, a mode selection unit, a status control unit, and a signal output unit; The signal switcher is electrically connected to the mode selection unit, the status control unit and the signal output unit respectively; The mode selection unit is electrically connected to the PD protocol control module, the status control unit is electrically connected to the input power supply, and the signal output unit is electrically connected to the display control module.

4. The Type-C display interface control circuit according to claim 3, characterized in that, The mode selection unit includes a first resistor and a second resistor; The first end of the first resistor is electrically connected to the mode selection pin of the PD protocol control module, the first end of the second resistor is grounded, and the second ends of both the first resistor and the second resistor are electrically connected to the mode selection pin of the signal switcher.

5. A Type-C display interface control circuit according to claim 3, characterized in that, The status control unit includes a third resistor, a fourth resistor, and a fifth resistor; The first end of the third resistor is electrically connected to the operation control pin of the signal switcher, and the second end of the third resistor is electrically connected to the input power supply. The first end of the fourth resistor is electrically connected to the IO pin of the signal switch, and the second end of the fourth resistor is electrically connected to the input power supply. The first end of the fifth resistor is electrically connected to the mode selection pin of the signal switcher, and the second end of the fifth resistor is electrically connected to the input power supply.

6. The Type-C display interface control circuit according to claim 1, characterized in that, The external output power switch unit includes a first MOSFET, a sixth resistor, a first capacitor, and a second capacitor; The drain of the first MOSFET is electrically connected to the first pin of the PD protocol control unit. The gate of the first MOSFET is electrically connected to the first end of the sixth resistor. The second end of the sixth resistor is electrically connected to the second pin of the PD protocol control unit. The source of the first MOSFET is electrically connected to the first end of the first capacitor, the first end of the second capacitor, and the Type-C interface module. The second end of the first capacitor is grounded, and the second end of the second capacitor is grounded.

7. A Type-C display interface control circuit according to claim 1, characterized in that, The buck drive oscillation unit includes a second MOSFET and a third MOSFET; The drain of the second MOS transistor is electrically connected to the third pin of the PD protocol control unit, the gate of the second MOS transistor is electrically connected to the current limiting unit, the source of the second MOS transistor is electrically connected to the drain of the third MOS transistor, the gate of the third MOS transistor is electrically connected to the current limiting unit, and the source of the third MOS transistor is grounded.

8. A display, characterized in that, Includes a Type-C display interface control circuit as described in any one of claims 1 to 7.

9. A method for controlling a Type-C display interface, characterized in that, The control method, applied to a Type-C display interface control circuit according to any one of claims 1 to 7, comprises: The button selection module is controlled to acquire the user's button selection signal; The display control module controls the PD protocol control module to switch to high-resolution mode or high-speed communication mode according to the button selection signal; The PD protocol control module is used to communicate with external devices connected to the Type-C interface module. Based on the button selection signal, the lane number allocation of the Type C interface module is selected in the communication protocol; The signal switching module and the display control module are controlled to switch to the corresponding mode state.

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