TWI772025B - Dual-mode trasmitting device and method for operating the same - Google Patents

Abstract

A dual-mode transmitting device includes a dual-mode signal output port used to conversably connecting a data source either to a DP signal receiving port or a HDMI signal receiving port; a detection module used to detect the type of receiving port connected to the dual-mode signal output port; and a signal mode control module used to convert the dual-mode signal output port into a port suitable for outputting DP signal corresponding to the DP signal receiving interface or a port suitable for outputting HDMI signal corresponding to the HDMI signal receiving port, according to the type of receiving port detected by the detection module.

Description

Dual-mode transmission device and method of operation thereof

The present invention relates to a data transmission device and an operation method thereof, particularly a dual-mode data transmission device and an operation method thereof.

Today's electronic products have higher and higher requirements for the transmission of audio, video and file data, which also makes the technology of high-speed transmission interface must be continuously improved. Traditional transmission interface technologies such as Digital Visual Interface (DVI), Video Graphics Array (VGA), and Low Voltage Differential Signaling (LVDS) have been unable to meet market demands. High Definition Multimedia Interface (HDMI), which adopts TMDS (Time Minimized Differential Signal) to minimize differential signal transmission, has gradually replaced the advantages of high transmission bandwidth, digital data protection and combined transmission of video and audio effects. traditional transport architecture.

However, due to the high licensing cost of HDMI, the DisplayPort (DP) interface technology with high compatibility and no royalty fee still occupies a place in the transmission interface market. Typical DP interface technology is to use low Differential voltage signal, and use the packet technology similar to Ethernet and USB interfaces to packetize the transmitted data for transmission.

In order to achieve the purpose of interconnection between the two different transmission interfaces, HDMI and DP, in addition to the transmission device, an additional converter, such as a server key (dongle), must be used between the two transmission interfaces for the transmission format. adjustment and conversion of signal content. Not only extra device cost is required, but also the transmitted data is prone to display image quality distortion due to signal loss during conversion, which increases the inconvenience of the user's operation.

Therefore, there is a need to provide an advanced dual-mode transmission device and an operation method thereof to solve the problems faced by the prior art.

The embodiment of this specification discloses a dual-mode transmission device, which includes a dual-mode signal output port, a detection module, and a signal mode control module. The dual-mode signal output port is used to connect the data source switchably to the DP signal receiving port or the HDMI signal receiving port. The detection module is used to detect the type of signal receiving port connected to the dual-mode signal output port. The signal mode control module converts the dual-mode signal output port into a DP standard signal output port according to the type of the signal receiving port detected by the detection module, corresponding to the DP signal receiving port; or converts the dual-mode signal output port Converted to HDMI standard signal output port, correspondingly connected to HDMI signal receiving port.

Another embodiment of the present specification discloses an operation method of a dual-mode transmission device. It includes the following steps: using a dual-mode signal output port to switchably connect a data source to a DP signal receiving port or an HDMI signal receiving port. A detection module built into the dual-mode signal output port is used to detect the type of signal receiving port connected to the dual-mode signal output port. A signal mode control module built in the dual-mode signal output port is used to convert the dual-mode signal output port into a corresponding one connected to the DP signal receiving port according to the type of signal receiving port detected by the detection module. DP standard signal output port; or convert the dual-mode signal output port into an HDMI standard signal output port connected to the HDMI signal receiving port. The data source can output HDMI signal or DP signal correspondingly through dual-mode signal output port.

According to the above-mentioned embodiments, the present specification provides a dual-mode transmission device and an operation method thereof. Use a dual-mode signal output port to connect a signal source that can output HDMI signals or DP signals to a signal receiving port; use the built-in detection module in the dual-mode signal output port to determine the connection to the dual-mode signal output port The signal receiving port type. When the detection module determines that the dual-mode signal output port is connected to the DP signal receiving port, the signal mode control module built in the dual-mode signal output port is used to convert the dual-mode signal output port into a DP standard Signal output port, output DP signal to DP signal receiving port. When the detection module determines that the HDMI signal receiving port is connected to the dual-mode signal output port, the dual-mode signal output port is converted into an HDMI standard signal output port, and the HDMI signal is received and output HDMI signal.

Through the built-in detection module and signal mode control module, the type of data transmitted through the dual-mode signal output port can be detected, and different transmission environments can be provided for different transmission data content. There is no need to use additional converters, such as server keys, to adjust the transmission format and convert the signal content for the transmitted data. It can not only save the cost of the device, but also avoid the problem of content distortion caused by signal loss during the data conversion process.

10: Dual mode transmission device

30: Detection circuit

40: Control data signal switching circuit

41-44: HDMI data signal switch components

50: Hot-plug signal switching circuit

50A: PMOS subcircuit

50B: NMOS Subcircuit

51: PMOS transistor switching element

52, 53, 54: NMOS transistor switching elements

55: Intermediate circuit

56: HDMI Power

60: Display data channel/auxiliary signal channel switching circuit

61: Display data channel

62: Auxiliary signal channel

63-65: Subcircuits

70: Front switching circuit

80: Microcontroller

102: Detection module

103: Signal transmission control module

110 dual-mode signal output ports

120: Signal source

121: DP power

130: Signal receiving device

130a: DP signal receiving port

130b: DP++ signal receiving port

130c: HDMI signal receiving port

PIN1-PIN20: pins

301, 302, 631, 632, 633, 641, 642, 651, 652: Switching elements

303, 304: Capacitive elements

305-307: Output

DP, DP++, HDMI: Signal

DATA: DP/HDMI data signal

DPD_DATA_AUXN_2, CLK_AUXP_2: Auxiliary signal

CLK_AUXP_1: Serial clock signal

DPD_DATA_AUXN_1: Serial data signal

DP_HPD_HDMI+5V_1: Voltage

HPD: hot plug signal

TMDS Data2+, TMDS Data2-, TMDS Data+, TMDS Data-, TMDS Data0+, TMDS Data0-, TMDS Clock+, TMDS Clock-, DP_LANE0_P, DP_LANE0_N, DP_LANE1_P, DP_LANE1_N, DP_LANE2_P, DP_LANE2_N, DP_LANE3_P, DP_LANE3_N: Data signal

DP_HDMI_PLUG_5V_L, DP_HDMI_PLUG_12V_L, DP_HDMI_PLUG_3V_L: low level signal

DP_HDMI_PLUG_5V_H, DP_HDMI_PLUG_12V_H, DP_HDMI_PLUG_3V_H: High potential signal

S91: Use a dual-mode transmission device to connect the data source to a signal receiving device with at least one DP signal receiving port or one HDMI signal receiving port

S92: Use the built-in detection module to detect the type of signal receiving port connected to the dual-mode signal output port

S93: Using the built-in signal mode control module, according to the detection results of the detection module, the dual-mode signal output port is converted into a corresponding connection to the DP The DP standard signal output port of the signal receiving port; or convert the dual-mode signal output port into a corresponding HDMI standard signal output port connected to the HDMI signal receiving port

S931A: The data signal switching circuit transmits the HDMI data signal provided by the data source to pins PIN1, PIN3, PIN4, PIN6, PIN7, PIN9, PIN10 and PIN12

S931B: The data signal switching circuit transmits the DP/DP++ data signal provided by the data source to pins PIN1, PIN3, PIN4, PIN6, PIN7, PIN9, PIN10 and PIN12

S932A: The hot-plug signal switching circuit causes pin PIN19 to output a hot-plug signal to the data source

S932B: Hot-plug signal switching circuit prompts pin PIN18 to output a hot-plug signal to the data source

S933A: Display data channel/auxiliary signal channel switching circuit transmits the serial data signal and serial clock signal provided by the data source to pins PIN16 and PIN15 respectively

S933B: Display data channel/auxiliary signal channel switching circuit transmits the serial data signal and serial clock signal provided by the data source to pins PIN17 and PIN15 respectively

S934A: The front switching circuit turns on the display data channel signal channel

S934B: The front switching circuit turns on the auxiliary signal channel

S935: Does the microcontroller reply to the data source if it needs a protocol that supports 4K and Audio

S94: The data source outputs HDMI signals or outputs DP/DP++ signals through the dual-mode signal output port to the signal receiver

In order to have a better understanding of the above and other aspects of this specification, the following specific embodiments are given and described in detail with the accompanying drawings as follows: FIG. 1 shows a dual-mode transmission device according to an embodiment of this specification. Figure 2 is a pin mapping diagram of a dual-mode signal output port according to an embodiment of this specification; Figure 3 is a detection mode according to an embodiment of this specification. Part of the circuit diagram of the detection circuit of the group; Figures 4A and 4B are part of the circuit diagram of the data signal switching circuit of the signal mode control module according to an embodiment of this specification, and the output according to the detection module According to the detection result, use the control data signal switching circuit to convert the dual-mode signal output port into the HDMI standard signal output port or the DP standard signal output port respectively. FIGS. 5A and 5B are partial circuit diagrams of the hot-plug signal switching circuit according to an embodiment of the present specification, and according to the detection result output by the detection module, using the hot-plug signal switching circuit to compare data The operation flow of the source to provide a hot-plug signal; Figures 6A and 6B are part of the circuit diagram of the display data channel/auxiliary signal channel switching circuit according to an embodiment of this specification, and according to the output of the detection module The detection result of the display data channel/auxiliary signal channel switching circuit is used to selectively open the operation flow of the display data channel or the auxiliary signal channel; FIG. 7 shows a part of the front switching circuit according to an embodiment of this specification circuit diagram; and FIG. 8 is a partial circuit diagram of a microcontroller according to an embodiment of the present specification according to an embodiment of the present specification; and FIG. 9 is used according to an embodiment of the present specification. A flow chart of the operation method of the aforementioned dual-mode transmission device for data transmission.

This specification provides a dual-mode transmission device and an operation method thereof, which can save the cost of the device and avoid the problem of content distortion caused by signal loss during data conversion. In order to make the above-mentioned embodiments and other objects, features and advantages of the present specification more clearly understood, a plurality of preferred embodiments are exemplified below and described in detail with the accompanying drawings.

However, it must be noted that these specific implementation cases and methods are not intended to limit the present invention. The present invention can still employ other features, elements, methods and parameters number to implement. The preferred embodiments are provided only to illustrate the technical features of the present invention, and not to limit the scope of the present invention. Those with ordinary knowledge in the technical field will be able to make equivalent modifications and changes based on the description of the following specification without departing from the spirit and scope of the present invention. In different embodiments and drawings, the same elements will be represented by the same element symbols.

Please refer to FIG. 1. FIG. 1 is a system block diagram of a dual-mode transmission device 10 according to an embodiment of the present specification. The dual-mode transmission device 10 may be a data transmission device connected between the signal source 120 and the signal receiving device 130 .

For example, in some embodiments of the present specification, the dual-mode transmission device 10 may be a device connected to a signal source 120 (eg, a desktop computer, DVD player, notebook computer, or mobile phone) and a signal receiving device 130 (eg, a monitor) ) is used to transmit the video and audio signals provided by the signal source 120 to the signal receiving device 130 for display and playback. The signal receiving device 130 can have a built-in data receiving port, such as a DP signal receiving port 130a, a DP++ signal receiving port 130b or an HDMI signal receiving port, according to the type of data to be played, such as a DP signal, a DP++ signal or an HDMI signal 130c.

The dual-mode transmission device 10 includes a dual-mode signal output port 110 , a detection module 102 and a signal-mode control module 103 . Wherein, the dual-mode signal output port 110 includes a connection port, which is switchably connected to the DP signal receiving port 130a, the DP++ signal receiving port 130b or the HDMI signal receiving port 130c of the signal receiving device 130 . Please refer to FIG. 2. FIG. 2 is a drawing according to an embodiment of the present specification. A pin map of the dual-mode signal output port 110 is shown. The left side of the pin map shows the pin position (number) PIN and the signal name (SIGNAL NAME) of the dual-mode signal output port 110 corresponding to outputting HDMI signals; the right side of the pin map shows the dual-mode signal output Port 110 corresponds to the pin position (PIN number) and the signal name when outputting the DP signal.

In this embodiment, the dual-mode signal output port 110 includes 21 pins PIN1 to PIN21. Among them, the pins PIN1 to PIN19 shown on the left side of the pin map respectively represent the corresponding pin definitions when outputting HDMI signals. The pins PIN1 to PIN20 shown on the right side of the pin map respectively represent the pin definitions when corresponding to the output DP. And when the dual-mode signal output port 110 correspondingly outputs HDMI signals, the pin PIN21 is not grounded; when the dual-mode signal output port 110 corresponds to outputting DP signals, the pin PIN21 is grounded.

The detection module 102 includes a detection circuit, which is electrically connected to the dual-mode signal output port 110 and the signal-mode control module 103 , and is used for detecting the type of the output port connected to the dual-mode signal output port 110 to determine its Whether it is the DP signal receiving port 130a, the DP++ signal receiving port 130b or the HDMI signal receiving port 130c. Please refer to FIG. 3 , which is a partial circuit diagram of the detection circuit 30 of the detection module 102 according to an embodiment of the present specification.

In this embodiment, the detection circuit 30 of the detection module 102 includes at least two switching elements 301 and 302 , two capacitive elements 303 and 304 , and three output terminals 305 - 307 respectively connected to the switching elements 301 and 302 . The output end 305 of the detection circuit 30 can be connected to the pin PIN21 of the dual-mode signal output port 110 , so that the pin PIN21 is used as the detection pin of the detection circuit 30 . When the dual-mode signal output port 110 and the DP signal receiving port 130a/ When the DP++ signal receiving port 130b is connected, the detection pin (pin PIN21) of the detection circuit 30 has a first potential; when the dual-mode signal output port 110 is connected with the HDMI signal receiving port 130c, the pin PIN21 has a first potential. The second potential; and the detected results are output through the output terminals 305-307 of the detection circuit 30.

Specifically, when the dual-mode signal output port 110 is connected to the DP signal receiving port 130a/DP++ signal receiving port 130b, the detection pin (pin PIN21) of the detection circuit 30 is grounded (as shown in FIG. 2 ). shown), the detection circuit 30 can output a low-level signal DP_HDMI_PLUG_5V_L through the output terminal 305 ; output a high-level signal DP_HDMI_PLUG_12V_H through the output terminal 306 ; and output a low-level signal DP_HDMI_PLUG_3V_L through the output terminal 307 . When the dual-mode signal output port 110 is connected to the HDMI signal receiving port 130c, since the detection pin (pin PIN21) of the detection circuit 30 is not grounded (as shown in FIG. 2), the detection circuit 30 can pass The output terminal 305 outputs a high-level signal DP_HDMI_PLUG_5V_H; the output terminal 306 outputs a low-level signal DP_HDMI_PLUG_12V_L; and the output terminal 307 outputs a high-level signal DP_HDMI_PLUG_3V_H.

The signal transmission control module 103 includes a data signal switching circuit 40, which is connected between the data source 120 and the dual-mode signal output port 110 (as shown in FIG. 1). The signal mode control module 103 can convert the dual-mode signal output port 110 into a DP standard signal output port according to the detection result output by the detection module 102, which is correspondingly connected to the DP signal receiving port 130a/130b; The signal output port 110 is converted into an HDMI standard signal output port, and is correspondingly connected to the HDMI signal receiving port 130c.

Please refer to FIG. 4A. FIG. 4A is a partial circuit diagram of the data signal switching circuit 40 of the signal mode control module 103 according to an embodiment of the present specification, and the detection result output by the detection module 102, Using the control data signal switching circuit 40 to convert the dual-mode signal output port 110 into an operation flow of an HDMI standard signal output port.

In this embodiment, the data signal switching circuit 40 of the signal mode control module 103 includes at least four HDMI data signal switch elements 41-44, and the gates of each HDMI data signal switch element 41-44 are respectively connected to the detection mode The output terminal 305 of the detection circuit 30 of the group 102; the source is grounded respectively. And the drain of the switch element 41 is connected to the pins PIN1 and PIN3 of the dual-mode signal output port 110; the drain of the switch element 42 is connected to the pins PIN4 and PIN6 of the dual-mode signal output port 110; the drain of the switch element 43 is connected to to the pins PIN7 and PIN9 of the dual-mode signal output port 110 ; the drain of the switch element 44 is connected to the pins PIN10 and PIN12 of the dual-mode signal output port 110 .

When the detection module 102 detects that the dual-mode signal output port 110 is connected to the HDMI signal receiving port 130c, the high-level signal DP_HDMI_PLUG_5V_H output from the output end 305 of the detection circuit 30 will turn on each HDMI data signal switch element 41- 44. Connect the HDMI interface of the data source 120 and the pins PIN1, PIN3, PIN4, PIN6, PIN7, PIN9, PIN10 and PIN12 of the dual-mode signal output port 110 to allow the data source 120 to transmit the DP/HDMI data signal DATA( For example data signal TMDS Data2+, TMDS Data2-, TMDS Data+, TMDS Data-, TMDS Data0+, TMDS Data0-, TMDS Clock+, TMDS Clock- and data signals DP_LANE0_P, DP_LANE0_N, DP_LANE1_P, DP_LANE1_N, DP_LANE2_P, DP_LANE2_N, DP_LANE3_P, DP_LANE3_N) are transmitted to the respective pins PIN1, PIN3, PIN4, PIN6, PIN7, PIN9, PIN10 and PIN12. At this time, the dual-mode signal output port 110 has been converted into an HDMI standard signal output port, and the HDMI data provided by the communication source 120 can be transmitted to the signal receiving device 130 through the dual-mode signal output port 110 and the HDMI signal receiving port 130c.

Please refer to FIG. 4B . FIG. 4B is a diagram illustrating the use of the control data signal switching circuit 40 to convert the dual-mode signal output port 110 into DP according to the detection result output by the detection module 102 according to an embodiment of the present specification. Specification of the operation flow of the signal output port. When the detection module 102 detects that the dual-mode signal output port 110 is connected to the DP signal receiving port 130a/DP++ signal receiving port 130b, the low-level signal DP_HDMI_PLUG_5V_L output by the output terminal 305 of the detection circuit 30 cannot enable the HDMI data signal The switch elements 41-44 cut off the connection between the HDMI interface of the data source 120 and the pins PIN1, PIN3, PIN4, PIN6, PIN7, PIN9, PIN10 and PIN12 of the dual-mode signal output port 110. At this time, the dual-mode signal output port 110 has been converted into a DP standard signal output port, and the data source 120 provides data signals (DP_LANE0_P, DP_LANE0_N, DP_LANE1_P, DP_LANE1_N, DP_LANE2_P, DP_LANE2_N, DP_LANE3_P, DP_LANE3_N) through the dual-mode signal output port 110 (pins PIN1, PIN3, PIN4, PIN6, PIN7, PIN9, PIN10 and PIN12) and the DP signal receiving port 130a/DP++ signal receiving port 130b are transmitted to the signal receiving device 130.

In some embodiments of this specification, the signal transmission control module 103 further includes a hot-plug signal switching circuit 50 . As shown in FIG. 1 , one end of the signal transmission control module 103 is connected to the data source 120 and is respectively connected to the detection module 102 and the dual-mode signal output port 110 for responding to the detection of the detection module 102 The detection result output by the circuit 30 is used to provide a hot-plug signal HPD to the data source 120 .

Please refer to FIG. 5A and FIG. 5B. FIG. 5A and FIG. 5B are partial circuit diagrams of the hot-plug signal switching circuit 50 according to an embodiment of the present specification, and the use of the hot-plug signal switching circuit 50 according to the detection The detection result output by the testing module 102 provides the data source 120 with an operation flow of a hot-plug signal.

In this embodiment, the hot-plug signal switching circuit 50 of the signal transmission control module 103 at least includes a P-type metal-oxide-semiconductor sub-circuit (hereinafter referred to as a PMOS sub-circuit) 50A and an N-type metal-oxide-semiconductor sub-circuit 50A. The semiconductor sub-circuit (hereinafter referred to as the NMOS sub-circuit) 50B. The PMOS sub-circuit 50A includes at least one PMOS transistor switch element 51 , the gate terminal of the PMOS transistor switch element 51 is electrically connected to the output terminal 306 of the detection circuit 30 ; the source terminal of the PMOS transistor switch element 51 is connected to the dual-mode signal The pin PIN18 of the output port 110; the drain terminal of the PMOS transistor switching element 51 is connected to the HDMI power supply 56 (5V_HDMI). The NMOS subcircuit 50B includes at least three NMOS transistor switching elements 52-54. The gate terminal of the NMOS transistor switching element 52 is connected to the output terminal 305 of the detection circuit 30 ; the drain terminal of the NMOS transistor switching element 52 is connected to the data source 120 through the intermediate circuit 55 . The gate terminals of the NMOS transistor switching elements 53 and 54 are both connected to the output terminal 306 of the detection circuit 30; the drain terminal of the NMOS transistor switching element 53 is connected to the pin PIN18 of the dual-mode signal output port 110; the NMOS transistor switching element The drain terminal of 54 is connected to the pin PIN19 of the dual-mode signal output port 110 .

As shown in FIG. 5A, when the detection module 102 detects that the dual-mode signal output port 110 is connected to the HDMI signal receiving port 130c, the low-level signal DP_HDMI_PLUG_12V_L output by the output terminal 306 of the detection circuit 30 will turn on the PMOS The transistor switch element 51 connects the pin PIN18 of the dual-mode signal output port 110 to the HDMI power supply 56 (5V_HDMI), and applies the voltage DP_HPD_HDMI+5V_1 to the NMOS sub-circuit 50B to turn on the NMOS transistor switch element 52 . At the same time, the low-level signal DP_HDMI_PLUG_12V_L output by the output terminal 306 of the detection circuit 30 will turn off the NMOS transistor switching elements 53 and 54 ; and the intermediate circuit 55 to output a hot-plug signal HDP to the data source 120 .

As shown in FIG. 5B, when the detection module 102 detects that the dual-mode signal output port 110 is connected to the DP signal receiving port 130a/DP++ signal receiving port 130b, the output terminal 306 of the detection circuit 30 outputs a low signal The potential signal DP_HDMI_PLUG_12V_H will turn off the PMOS transistor switching element 51, and turn on the NMOS transistor switching elements 53 and 54; The device 52 is turned off, and the pin PIN19 of the dual-mode signal output port 110 is grounded through the NMOS transistor switching element 54; so that the pin PIN18 of the dual-mode signal output port 110 (the voltage is DP_HPD_HDMI+5V) passes through the NMOS transistor switching element. 53 and the intermediate circuit 55 output a hot-plug signal HDP to the data source 120 .

In some embodiments of this specification, the signal transmission control module 103 further includes a display data channel (Display Data Channel, DDC)/auxiliary signal channel (AUX Channel) switching circuit 60 . As shown in FIG. 1 , one end of the display data channel/auxiliary signal channel switching circuit 60 is connected to the data source 120 and is respectively connected to the detection circuit 30 of the detection module 102 and a plurality of auxiliary signals of the dual-mode signal output port 110 The signal pin is used to selectively turn on a display data channel 61 or an auxiliary signal channel 62 in response to the detection result of the detection circuit 30 .

Please refer to FIG. 6A. FIG. 6A is a partial circuit diagram of the display data channel/auxiliary signal channel switching circuit 60 according to an embodiment of the present specification, and a display using the display according to the detection result output by the detection module 102 The data channel/auxiliary signal channel switching circuit 60 selectively enables the operation flow of the display data channel 6 .

In this embodiment, the display data channel/auxiliary signal channel switching circuit 60 includes at least three sub-circuits 63-65. The sub-circuit 63 includes at least three switching elements 631 , 632 and 633 . The gate of the switching element 631 is connected to the output terminal 306 of the detection circuit 30 , the source is grounded, and the drain is connected to the pin PIN16 of the dual-mode signal output port 110 . The gates of the switching elements 632 and 633 are both connected to the output terminal 307 of the detection circuit 30, and their sources are connected in series, and the drain of the switching element 632 is connected to the resource. The source 120 and the drain of the switching element 633 are connected to the pin PIN16 of the dual-mode signal output port 110 .

The subcircuit 64 includes two switching elements 641 and 642 . The gate of the switching element 641 is connected to the output terminal 306 of the detection circuit 30 , the source is connected to the pin PIN17 of the dual-mode signal output port 110 , and the drain is connected to the data source 120 . The gate of the switching element 642 is connected to the output terminal 305 of the detection circuit 30 , the source is grounded, and the drain is connected to the pin PIN17 of the dual-mode signal output port 110 . The subcircuit 65 includes two switching elements 651 and 652 . The gate of the switching element 651 is connected to the output terminal 305 of the detection circuit 30, the source is connected to the data source 120, and the drain is connected to the HDMI power supply 56 (5V_HDMI). The switching element 652 is normally open, the source of the switching element 652 is connected in parallel with the source of the switching element 651 , and is connected to the data source 120 , and the drain is connected to the pin PIN15 of the dual-mode signal output port 110 .

As shown in FIG. 6A, when the detection module 102 detects that the dual-mode signal output port 110 is connected to the HDMI signal receiving port 130c, the low-level signal DP_HDMI_PLUG_12V_L output by the output terminal 306 of the detection circuit 30 will turn off the switch Elements 631 and 641; the high-level signal DP_HDMI_PLUG_3V_H output from the output terminal 307 of the detection circuit 30 will turn on the switching elements 632 and 633; the high-level signal DP_HDMI_PLUG_5V_H output by the output terminal 305 of the detection circuit 30 will turn on the switching elements 642 and 651 . Thereby, the display data channel 61 is turned on, and the serial data signal DPD_DATA_AUXN_1 provided by the data source 120 is connected to the SDA (HDMI_SDA_1) pin of the HDMI standard signal output port through the sub-circuits 63 and 64 respectively (dual-mode signal output port 110 pin PIN16); the serial clock signal CLK_AUXP_1 provided by the data source 120 is connected to the SCL pin of the HDMI standard signal output port (pin PIN15 of the dual-mode signal output port 110) through the sub-circuit 65.

As shown in FIG. 6B, when the detection module 102 detects that the dual-mode signal output port 110 is connected to the DP++ signal receiving port 130b, the high-level signal DP_HDMI_PLUG_12V_H output by the output terminal 306 of the detection circuit 30 will turn on the switch Elements 631 and 641; the low-level signal DP_HDMI_PLUG_3V_L output by the output terminal 307 of the detection circuit 30 will turn off the switching elements 632 and 633; the low-level signal DP_HDMI_PLUG_5V_L output by the output terminal 305 of the detection circuit 30 will turn off the switching elements 642 and 651 ; Thereby, the auxiliary signal channel 62 is turned on, and the auxiliary signal DPD_DATA_AUXN_2 provided by the data source 120 is connected to the AUXN pin of the DP++ specification signal output port (the pin 17 of the dual-mode signal output port 110) through the sub-circuit 64; The auxiliary signal CLK_AUXP_2 provided by 120 is connected to the AUXP pin of the DP++ standard signal output port (pin PIN15 of the dual-mode signal output port 110 ) through the sub-circuit 65 .

In some embodiments of this specification, the signal transmission control module 103 further includes a pre-switching circuit 70 connected between the display data channel/auxiliary signal channel switching circuit 60 and the data source 120 . Please refer to FIG. 7 , which is a partial circuit diagram of the pre-switching circuit 70 according to an embodiment of the present specification. In this embodiment, the pre-switching circuit 70 is respectively connected to a detection pin (pin PIN21 ) and a switching pin (pin PIN13 ) of the dual-mode signal output port 110 .

When the detection module 102 detects that the dual-mode signal output port 110 is connected to the HDMI signal receiving port 130c, the detection pin (pin PIN21) is at a high level, which can be used to turn on the display data channel signal channel 61. Since the potential of the cut pin PIN13 is not changed, it can avoid affecting the CEC function of HDMI. When the detection module 102 detects that the dual-mode signal output port 110 is connected to the DP signal receiving port 130a/DP++ signal receiving port 130b, the detection pin (pin PIN21) is at a low level, and the switch pin (pin 21) can be adjusted. The potential of the pin PIN13) to turn on the auxiliary signal channel 62.

In addition, the signal transmission control module 103 further includes a microcontroller 80 . Please refer to FIG. 8. FIG. 8 is a partial circuit diagram of a microcontroller 80 according to an embodiment of the present specification. In this embodiment, the microcontroller 80 is connected to the data source 120 (as shown in FIG. 1 ) through the display data channel/auxiliary signal channel switching circuit 60 ; and the detection module 102 detects the output of the circuit 30 respectively. Terminals 305 and 307 are connected.

When the detection module 102 detects that the dual-mode signal output port 110 is connected to the HDMI signal receiving port 130c, it can respond to the detection result of the detection module 102 (for example, the high-level signals DP_HDMI_PLUG_5V_H output by the output terminals 305 and 307 ) and DP_HDMI_PLUG_3V_H), reply whether the data source 120 needs to support 4K and Audio protocol, and transmit the serial data signal DPD_DATA_AUXN_1 and serial clock signal CLK_AUXP_1 provided by the data source 120 to the HDMI standard signal output port (dual mode signal output port 110 ).

Please refer to FIG. 9 . FIG. 9 is a flowchart illustrating an operation method for data transmission using the aforementioned dual-mode transmission device 10 according to an embodiment of the present specification. First, use the dual-mode transmission device 10 to connect the data source 120 to the signal receiving device 130 having at least one DP signal receiving port 130a (one DP++ signal receiving port 130b) or one HDMI signal receiving port 130c (step S91).

Next, the detection module 102 is used to detect the type of the signal receiving port connected to the dual-mode signal output port 110 . (as in step S92). In this embodiment, the detection module 102 determines the type of the signal receiving port connected to the dual-mode signal output port 110 by detecting the potential level of the pin PIN21 of the dual-mode signal output port 110 . When the detection module 102 detects that the pin PIN21 is at a high level, it is determined that the dual-mode signal output port 110 is connected to the HDMI signal receiving port 130c. When the detection module 102 detects that the pin PIN21 is at a low level, it is determined that the dual-mode signal output port 110 is connected to the DP signal receiving port 130a/DP++ signal receiving port 130b.

Then, the signal mode control module 103 built in the dual mode signal output port 110 is used to convert the dual mode signal output port into a DP specification corresponding to the DP signal receiving port according to the detection result of the detection module signal output port; or convert the dual-mode signal output port into an HDMI standard signal output port corresponding to the HDMI signal receiving port (as in step S93).

In some embodiments of this specification, when the detection module 102 determines that the dual-mode signal output port 110 is connected to the HDMI signal receiving port 130c, the data signal switching circuit 40 of the signal mode control module 103 can switch the data signal provided by the data source 120 The DP/HDMI data signal DATA is transmitted to the dual-mode signal output port 110 Each of the pins PIN1, PIN3, PIN4, PIN6, PIN7, PIN9, PIN10 and PIN12 (as in step S931A). The hot-plug signal switching circuit 50 of the signal mode control module 103 can cause the pin PIN19 of the dual-mode signal output port 110 to output a hot-plug signal HDP to the data source 120 (as in step S932A). The display data channel/auxiliary signal channel switching circuit 60 of the signal mode control module 103 can respectively transmit the serial data signal DPD_DATA_AUXN_1 and the serial clock signal CLK_AUXP_1 provided by the data source 120 to the pin PIN16 of the dual-mode signal output port 110 and PIN15 (as in step S933A). The front switching circuit 70 of the signal mode control module 103 can turn on the display data channel signal channel 61 (as in step S934A). The microcontroller 80 of the signal mode control module 103 can reply whether the data source 120 needs to support the protocol of 4K and Audio (as in step S935).

When the detection module 102 determines that the dual-mode signal output port 110 is connected to the DP signal receiving port 130a/DP++ signal receiving port 130b, the data signal switching circuit 40 of the signal mode control module 103 can switch the DP power 121 and the DP/HDMI data The data signals provided by the signal DATA (for example, data signals DP_LANE0_P, DP_LANE0_N, DP_LANE1_P, DP_LANE1_N, DP_LANE2_P, DP_LANE2_N, DP_LANE3_P, DP_LANE3_N) are transmitted to the pins PIN1, PIN3, PIN4, PIN6, PIN7, PIN9 of the dual-mode signal output port 110 , PIN10 and PIN12 (as in step S931B). The hot-plug signal switching circuit 50 of the signal mode control module 103 can make the pin PIN18 of the dual-mode signal output port 110 output a hot-plug signal HDP to the data source 120 (as in step S932B). Signal Mode Control Mode The display data channel/auxiliary signal channel switching circuit 60 of the group 103 can transmit the serial data signal DPD_DATA_AUXN_2 and the serial clock signal CLK_AUXP_2 provided by the data source 120 to the pins PIN17 and PIN15 of the dual-mode signal output port 110 (eg Step S933B). The pre-switching circuit 70 of the signal mode control module 103 can (switch the potential of the pin PIN13) to turn on the auxiliary signal channel 62 (as in step S934B).

And let the data source 120 output the HDMI signal or output the DP/DP++ signal to the signal receiving device 130 through the dual-mode signal output port 110 (as in step S94).

According to the above-mentioned embodiments, the present specification provides a dual-mode transmission device and an operation method thereof. Use a dual-mode signal output port to connect a signal source that can output HDMI signals or DP signals to a signal receiving port; use the built-in detection module in the dual-mode signal output port to determine the connection to the dual-mode signal output port The signal receiving port type. When the detection module determines that the dual-mode signal output port is connected to the DP signal receiving port, the signal mode control module built in the dual-mode signal output port is used to convert the dual-mode signal output port into a DP standard Signal output port, output DP signal to DP signal receiving port. When the detection module determines that the HDMI signal receiving port is connected to the dual-mode signal output port, the dual-mode signal output port is converted into an HDMI standard signal output port, and the HDMI signal is received and output HDMI signal.

Through the built-in detection module and signal mode control module, the type of data transmitted through the dual-mode signal output port can be detected, and the Different transmission environments are provided by the same transmission data content. There is no need to use additional converters, such as server keys, to adjust the transmission format and convert the signal content for the transmitted data. It can not only save the cost of the device, but also avoid the problem of content distortion caused by signal loss during the data conversion process.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application.

10: Dual mode transmission device

40: Control data signal switching circuit

50: Hot-plug signal switching circuit

56: HDMI Power

60: Display data channel/auxiliary signal channel switching circuit

61: Display data channel

62: Auxiliary signal channel

70: Front switching circuit

80: Microcontroller

102: Detection module

103: Signal transmission control module

110: Dual mode signal output port

120: Signal source

121: DP power

130: Signal receiving device

130a: DP signal receiving port

130b: DP++ signal receiving port

130c: HDMI signal receiving port

DP, DP++, HDMI: Signal

DATA: DP/HDMI data signal

HPD: hot plug signal

Claims (7)

An operation method of a dual-mode transmission device, comprising: using a dual-mode signal output port to convert a data source to a DP signal receiving port or an HDMI signal receiving port; using a built-in dual-mode signal output port A detection module in the device detects the type of a signal receiving port connected to the dual-mode signal output port; a signal mode control module built in the dual-mode signal output port is used to detect the type of the signal receiving port according to the type of the signal receiving port. , the dual-mode signal output port is converted into a DP standard signal output port, which is correspondingly connected to the DP signal receiving port; or the dual-mode signal output port is converted into an HDMI standard signal output port, which is correspondingly connected to the HDMI signal receiving port; And make the data source output an HDMI signal or a DP signal correspondingly through the dual-mode signal output port. The operation method of the dual-mode transmission device as claimed in claim 1, wherein the step of detecting the type of the signal receiving port connected to the dual-mode signal output port comprises using a detection pin of the dual-mode signal output port to perform Detection: when the dual-mode signal output port is connected with the DP signal receiving port, the detection pin has a first potential; and when the dual-mode signal output port is connected with the HDMI signal receiving port, the detection The pin has a second potential. The operation method of the dual-mode transmission device as claimed in claim 1, wherein the HDMI data signal switch is connected between the data source and a plurality of data output pins of the dual-mode signal output port; the dual-mode signal output port The step of converting into the DP standard signal output port, or converting the dual-mode signal output port into the HDMI standard signal output port, includes: opening and closing an HDMI data signal switch of a data signal switching circuit according to the type of the signal receiving port, to allow or disable the data source to transmit the HDMI data signal to the dual-mode signal output port. The operation method of the dual-mode transmission device as claimed in claim 1, wherein the dual-mode signal output port is converted into the DP standard signal output port, or the step of converting the dual-mode signal output port into the HDMI standard signal output port , including: according to the type of the signal receiving port, a hot-plug signal switching circuit is used to provide a hot-plug signal to the data source; one end of the hot-plug signal switching circuit is connected to the data source, and the other end is respectively connected to the dual A first hot-plug pin and a second hot-plug pin of the mode signal output port are used to switch the first hot-plug pin or the hot-plug second pin to provide the data source the hot-plug signal; when the hot-plug signal switching circuit switches the second hot-plug pin to provide the hot-plug signal to the data source, the first hot-plug pin is connected to an HDMI power source. The operation method of the dual-mode transmission device as claimed in claim 1, wherein the dual-mode signal output port is converted into the DP standard signal output port, or the step of converting the dual-mode signal output port into the HDMI standard signal output port , including: according to the type of the signal receiving port, using a display data channel/auxiliary signal channel switching circuit to selectively open a display between the data source and a plurality of auxiliary signal pins of the dual-mode signal output port A data channel or an auxiliary signal channel; wherein the display data channel is used to conduct a series of data signals and a series of clock signals provided by the data source; the auxiliary signal channel is used to conduct a series of data signals provided by the data source. an auxiliary signal. The operation method of the dual-mode transmission device as claimed in claim 1, wherein the dual-mode signal output port is converted into the DP standard signal output port, or the step of converting the dual-mode signal output port into the HDMI standard signal output port , including: using a pre-switching circuit, connected between the display data channel/auxiliary signal channel switching circuit and the data source; and respectively connected to the detection pin and a switching pin; when the detection pin Or when the switch pin is at a high level, it can be used to turn on a display data channel signal; when the switch pin is at a low level, it can be used to turn on an auxiliary signal. The operation method of the dual-mode transmission device as claimed in claim 1, wherein the dual-mode signal output port is converted into the DP standard signal output port, or the step of converting the dual-mode signal output port into the HDMI standard signal output port , including: using a microcontroller to reply whether the data source needs 4K and Audio protocol according to the type of the signal receiving port.

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