TW202014905A - Electronic device and electronic system - Google Patents

Abstract

An electronic device and an electronic system are provided. The electronic device includes a first Type-C port and a processor. The processor is coupled to the first Type-C port and configured to receive signals from an external host through the Type-C port. One of two configuration channel (CC) pins of the first Type-C port is floating. The electronic system includes the electronic device and a signal transmission line. The signal transmission line is compatible with the first Type-C port. When an end of the signal transmission line is connected to the first Type-C port, the two CC pins of the first Type-C port are electronically connected to another end of the signal transmission line.

Description

Electronic device and electronic system

The invention relates to an electronic device, and in particular to an electronic device and an electronic system for receiving signals through a Type-C interface.

The Type-C interface is a very popular new-generation data transmission interface in recent years. Many smart phones, notebook computers, desktop computers, and even game consoles and other electronic devices have begun to use this interface port (also known as Type -C port). The biggest feature of the Type-C port in appearance is that its upper and lower ends are exactly the same, which is a symmetrical design, so there is no need to consider the direction of the plug when plugging and unplugging.

Generally speaking, when transmitting signals between two Type-C interfaces, a set of Configuration Channel (CC) pins (for example, CC1 pin and CC2 pin) are used to communicate with the host (also known as a signal) The source side (Source) and the device side (also known as the signal receiving side (Sink)) for power delivery (Power Delivery, PD) protocol communication, and the use of digital multiplexers (Multiplexer, the host side and the device side internal MUX) to switch between plug forward and reverse plug.

FIG. 1 shows a schematic diagram of a conventional host 10 transmitting a signal to the device 20 by Type-C DisplayPort Alternate Mode (ALT mode); FIG. 2 shows a schematic diagram of a conventional Type-C CC connection circuit.

1 and 2, the CC1 pin CC1sr and the CC2 pin CC2sr of the host 10 both have pull-up resistors Rp, and the CC1 pin CC1sk and CC2 pin CC2sk of the device 20 both have pull-down resistors Rd. In particular, there is only one CC line Lcc in the conventional Type-C signal transmission line 30, so only one of the CC pins of the host 10 (for example, the CC1 pin CC1sr shown in FIG. 2) can be connected to the device 20 One of the CC pins (for example, but not limited to, the CC2 pin CC2sk shown in FIG. 2), and the multiplexer will switch the forward and reverse insertion mode to transfer signals according to which CC pin is connected (for example, DisplayPort video signals DP0 to DP3).

Specifically, when the PD controller 11 detects the pull-down resistor Rd inside the device 20 through the CC1 pin CC1sr, it instructs the multiplexer 12 to switch between the image signal source 13 and the Type-C port 14 in the forward insertion mode Signals are transmitted between them (as shown in Figure 1); when the PD controller 11 detects the pull-down resistor Rd inside the device 20 through the CC2 pin CC2sr, it instructs the multiplexer 12 to reverse the insertion mode between the image signal source 13 and Signals are transmitted between the Type-C ports 14 (not shown); when the PD controller 12 detects the pull-up resistor Rp inside the host 10 through the CC1 pin CC1sk, it will instruct the multiplexer 22 to come in the forward insertion mode Signals (not shown) are transmitted between the video signal receiving terminal 23 and the Type-C port 24; when the PD controller 12 detects the pull-up resistor Rp inside the host 10 through the CC2 pin CC2sk, it will indicate multiplexing The receiver 22 transmits the signal between the video signal receiving terminal 23 and the Type-C port 24 in the reverse insertion mode (as shown in FIG. 1).

Due to the high price of the digital multiplexer, the installation of the digital multiplexer on both the host and the device will greatly increase the manufacturing cost.

In view of this, embodiments of the present invention provide an electronic device and an electronic system, which can eliminate the need for a digital multiplexer in the device end and reduce the manufacturing cost.

The electronic device of the embodiment of the present invention includes a first Type-C port and a processor. The processor is coupled to the first Type-C port for receiving signals from the external host through the first Type-C port, wherein one of the two configuration channel pins of the first Type-C port floats Pick up.

In an embodiment of the invention, the other one of the above two configuration channel pins is electrically connected to one end of the resistor, and the other end of the resistor is grounded.

In an embodiment of the invention, the above electronic device further includes a display. The display is coupled to the processor, wherein the processor displays the image frame on the display according to the signal received from the external host.

In an embodiment of the invention, the above signal transmission mode is a Type-C DisplayPort alternative mode.

In an embodiment of the invention, the other one of the above two configuration channel pins is coupled to the power transmission controller, wherein the power transmission controller is used to determine the signal transmission mode of the signal.

In an embodiment of the invention, the above-mentioned first Type-C port transmits the signal to the processor without passing through the multiplexer.

In an embodiment of the invention, the above electronic device further includes a signal transmission line. The signal transmission line is electrically connected to the first Type-C port. The first Type-C port is connected to the second Type-C port of the external host through a signal transmission line, and the signal transmission line electrically connects the non-floating configuration channel pins in the first Type-C port to the second Type -One of the two configuration channel pins of the C port.

In an embodiment of the invention, the electronic device is a head-mounted display (HMD).

The electronic system of the embodiment of the present invention includes an electronic device and a signal transmission line. The electronic device includes a first Type-C port and a processor. The processor is coupled to the first Type-C port for receiving signals from the external host through the first Type-C port, wherein one of the two configuration channel pins of the first Type-C port floats Pick up. The signal transmission line is compatible with the first Type-C port. When one end of the signal transmission line is connected to the first Type-C port, the two configuration channel pins of the first Type-C port are electrically connected to the other end of the signal transmission line.

In an embodiment of the invention, when the signal transmission line is connected to the first Type-C port and the second Type-C port of the external host, the signal transmission line respectively connects the two configuration channels of the second Type-C port The pins are electrically connected to the two configuration channel pins of the first Type-C port.

Based on the above, the electronic system and the electronic device proposed in the embodiments of the present invention can free up the digital multiplexing in the device end without changing the design of the signal source end (host end) without floating one of the CC pins of the device end The demand for devices, which in turn reduces manufacturing costs.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

FIG. 3 is a schematic block diagram of an electronic system according to an embodiment of the invention.

Referring to FIG. 3, the electronic system includes an electronic device 100 and a signal transmission line 200. The electronic device 100 and the signal transmission line 200 are both compatible with a Type-C interface (also known as a USB-C interface or a USB Type-C interface). The signal transmission line 200 is used to connect the electronic device 100 to an external host, regardless of the connection direction of the signal transmission line 200 (for example, forward or reverse insertion), the electronic device 100 can smoothly receive signals from the external host without a multiplexer . In some embodiments, the electronic device 100 is, for example, a head-mounted display (HMD), and the signal transmission line 200 is used to connect the head-mounted display and the source host of the image signal to transfer the image signal from the source host To head-mounted display. It should be understood, however, that the invention is not limited to head-mounted display implementations.

The electronic device 100 includes a Type-C port 110 and a processor 120, wherein the processor 120 is coupled to the Type-C port 110.

The Type-C port 110 has multiple pins, including, for example, a ground pin, a power pin, a differential signal pin, a side band use (SBU) pin, and two configuration channels (CC) Pins, etc. Two CC pins include CC1 pin 111 and CC2 pin 112. In particular, one of the two CC pins is floating, and the other of the two CC pins is electrically connected to one end of a resistor (such as, but not limited to, a pull-down resistor Rd). As shown in FIG. 3, the CC1 pin 111 is connected to one end of the pull-down resistor Rd, and the other end of the pull-down resistor Rd is grounded, and the CC2 pin 112 is floated without connecting other components. It is worth mentioning that in the embodiment of FIG. 3, the CC1 pin 111 is electrically connected to the pull-down resistor Rd and the CC2 pin 112 is floating, but the invention is not limited thereto. In other embodiments, the floating CC pin may also be the CC1 pin, and the CC2 pin is electrically connected to the pull-down resistor Rd. It must be noted that when the floating CC pin is the CC1 pin, the connection between the processor 120 and the Type-C port 110 must be adjusted accordingly. For example, assuming that the floating CC pin is the CC2 pin, the processor 120 and the Type-C port 110 are connected to each other in the positive insertion mode, if the floating CC pin is the CC1 pin Therefore, the processor 120 and the Type-C port 110 must be adjusted to connect to each other in the reverse insertion mode.

The processor 120 is used to receive signals, such as data or images, from an external host (not shown in FIGS. 1 and 2) through the Type-C port 110. Specifically, the processor 120 is a device with computing capability, which can process or calculate signals received from an external host. In some embodiments, the processor 120 is, for example, a dual-core, quad-core, or eight-core central processing unit (CPU), system-on-chip (SOC), application processor ( application processor, media processor, microprocessor, digital signal processor programmable controller, application specific integrated circuits (ASIC), programmable A programmable logic device (programmable logic device, PLD) or other similar device or a combination of these devices is not limited in this invention.

In some embodiments, in addition to the Type-C port 110 and the processor 120, the electronic device 100 further includes a Power Delivery (PD) controller 130 and a display 140.

The PD controller 130 is coupled to the non-floating CC pin (for example, the CC1 pin 111), and is used to communicate PD agreements with an external host through the connected CC pin. For example, after the electronic device 100 is connected to an external host through the signal transmission line 200, the PD controller 130 may determine the signal transmission mode between the electronic device 100 and the external host. In some embodiments, the PD controller 130 determines, for example, that the signal transmission mode between the electronic device 100 and the external host is Type-C DisplayPort Alternate Mode (ALT mode), but the invention is not limited thereto. Those with ordinary knowledge in the art can understand the operation mode of the PD controller 130 from the related materials of the conventional PD controller and PD agreement, so they will not repeat them here.

The display 140 is coupled to the processor 120 for displaying image frames. In some embodiments, after the processor 120 receives the image signal through the signal transmission line 200 and the Type-C port 110, for example, the corresponding image frame is displayed on the display 140 according to the image signal. In some embodiments, the display 140 is, for example, a two-dimensional or three-dimensional liquid crystal display (Liquid-Crystal Display, LCD), a light-emitting diode (LED), or an organic light-emitting diode (Organic Light-Emitting Diode) , OLED) and other types of displays, the invention is not limited thereto.

The signal transmission line 200 includes two Type-C connectors 210 and 220 and a wire body 230. The two Type-C connectors 210 and 220 are respectively disposed at both ends of the signal transmission line 200.

The Type-C connector 210 is compatible with the Type-C port 110 of the electronic device 100. Specifically, the Type-C connector 210 has multiple pins (for example, but not limited to, 24), and the multiple pins of the Type-C connector 210 are multiple pins corresponding to the Type-C port 110 Feet. Therefore, the Type-C connector 210 includes two pins 211, 212 corresponding to the CC pins 111, 112. When the Type-C connector 210 is connected to the Type-C port 110, the pins 211 and 212 are electrically connected to the CC pins 111 and 112 or the pins 211 and 212 are electrically connected to the CC pins 112 and 111 respectively .

Similarly, the Type-C connector 220 is also compatible with the Type-C port 110 of the electronic device 100, and includes two pins 221, 222 corresponding to the CC pins 111, 112. When the Type-C connector 220 is connected to the Type-C port 110, the pins 221 and 222 are electrically connected to the CC pins 111 and 112 or the pins 221 and 222 are electrically connected to the CC pins 112 and 111 respectively .

The wire body 230 is used to connect a plurality of pins of the Type-C connector 210 and a plurality of pins of the Type-C connector 220. In particular, the wire body 230 includes two CC lines Lcc, and electrically connects the pins 211 and 212 of the Type-C connector 210 to the pins 221 and 222 of the Type-C connector 220, respectively. Therefore, when one end of the signal transmission line 200 (for example, the Type-C connector 210) is connected to the Type-C port 110, both CC pins 111 and 112 of the Type-C port 110 are electrically connected to the signal The other end of the transmission line 200 (Type-C connector 220).

In some embodiments, the electronic device 100 and the signal transmission line 200 are two independent entities, and the Type-C connectors 210 and 220 of the signal transmission line 200 are compatible and pluggable into the Type-C port of the electronic device 100 110.

In some embodiments, the Type-C connector 210 of the signal transmission line 200 is non-removably connected to the Type-C connector 110 of the electronic device 100, so the electronic device 100 and the signal transmission line 200 are interconnected and inseparable individual. In this case, the electronic device 100 can be regarded as a device including the signal transmission line 200. In this way, it can prevent users from misusing the traditional signal transmission line including only one CC line (for example, the Type-C signal transmission line 30 of FIG. 1), which causes one end of the CC line to be connected to the floating CC pin 112 when reverse insertion Make the external device unable to operate normally. On the other hand, the signal transmission line 200 that is connected to the electronic device 100 and is inseparable can be implemented using a higher-quality transmission wire, so that the electronic device 100 has special applications (for example, as a head-mounted display requires a longer Signal transmission line) can also have good signal transmission quality.

FIG. 4 illustrates a schematic diagram of an external host transmitting a signal to an electronic device by using the Type-C DisplayPort alternative mode when the signal transmission line is being inserted.

Referring to FIG. 4, the electronic device 100 is connected to the host 10 through the signal transmission line 200 and receives signals from the host 10 (for example, DisplayPort video signals DP0 to DP3). The host 10 is the same as the conventional host 10 in FIG. 1 and includes, for example, a USB host, a PD controller 11, a multiplexer 12, an image signal source 13, and a Type-C port 14. As shown in FIG. 4, the signal transmission line 200 is plugged between the host 10 and the electronic device 100, so the signal transmission line 200 connects the TX1 pin of the Type-C port 14 to the RX1 of the Type-C port 110 Connect the RX1 pin of Type-C port 14 to the TX1 pin of Type-C port 110; connect the TX2 pin of Type-C port 14 to the RX2 pin of Type-C port 110; And connect the RX2 pin of the Type-C port 14 to the TX2 pin of the Type-C port 110. In particular, the signal transmission line 200 being inserted will also connect the CC1 pin of the Type-C port 14 to the CC1 pin 111 of the Type-C port 110; and the CC2 pin of the Type-C port 14 to CC2 pin 112 of Type-C port 110.

Similar to the host 10 in FIG. 1, when the PD controller 11 detects the pull-down resistor Rd inside the electronic device 100 through the CC1 pin of the host 10, it instructs the multiplexer 12 to use the positive insertion mode to the video signal source 13 Signal transmission with Type-C port 14. Under the connection of the signal transmission line 200 with two CC lines Lcc, since the CC1 pin 111 of the electronic device 100 has a pull-down resistor Rd and the CC2 pin 112 is floating, the positively inserted signal transmission line 200 makes the host 10 Only the CC1 pin will detect the pull-down resistor Rd inside the CC1 pin 111 of the electronic device 100 to cause the multiplexer 12 to transmit signals between the image signal source 13 and the Type-C port 14 in the positive insertion mode.

In some embodiments, the forward insertion mode refers to transmitting the signal DP0 to the TX1 pin of the Type-C port 14 to transmit the signal DP0 to the RX1 lead of the Type-C port 110 through the forward signal transmission line 200 Pass the signal DP1 to the RX1 pin of the Type-C port 14 to pass the signal DP1 to the TX1 pin of the Type-C port 110 through the signal transmission line 200; pass the signal DP2 to the Type-C port 14 The TX2 pin is used to pass the signal DP2 to the RX2 pin of the Type-C port 110 through the positive signal transmission line 200; and the signal DP3 is passed to the RX2 pin of the Type-C port 14 to pass the signal transmission line 200 transmits the signal DP3 to the TX2 pin of the Type-C port 110. Accordingly, the processor 120 of the electronic device 100 can receive the DisplayPort video signals DP0, DP1, DP2, and DP3 from the image signal source 13 from the RX1, TX1, RX2, and TX2 pins of the Type-C port 110, respectively.

FIG. 5 illustrates a schematic diagram of an external host transmitting a signal to an electronic device by using the Type-C DisplayPort replacement mode when the signal transmission line is reversely inserted.

Please refer to FIG. 5. The signal transmission line 200 is reversely connected between the host 10 and the electronic device 100. Therefore, the signal transmission line 200 connects the TX1 pin of the Type-C port 14 to the RX2 of the Type-C port 110. Connect the RX1 pin of Type-C port 14 to the TX2 pin of Type-C port 110; connect the TX2 pin of Type-C port 14 to the RX1 pin of Type-C port 110; And connect the RX2 pin of Type-C port 14 to the TX1 pin of Type-C port 110. In particular, the inverted signal transmission line 200 will also connect the CC1 pin of the Type-C port 14 to the CC2 pin 112 of the Type-C port 110; and the CC2 pin of the Type-C port 14 to The CC1 pin 111 of the Type-C port 110.

Similar to the host 10 in FIG. 1, when the PD controller 11 detects the pull-down resistor Rd inside the electronic device 100 through the CC2 pin of the host 10, it instructs the multiplexer 12 to reverse the insertion mode to the video signal source 13 Signal transmission with Type-C port 14. Under the connection of the signal transmission line 200 with two CC lines Lcc, since the CC1 pin 111 of the electronic device 100 has a pull-down resistance Rd and the CC2 pin 112 is floating, the reversed signal transmission line 200 makes the host 10 Only the CC2 pin will detect the pull-down resistor Rd inside the CC1 pin 111 of the electronic device 100 to cause the multiplexer 12 to transmit signals between the image signal source 13 and the Type-C port 14 in the reverse insertion mode.

In some embodiments, the reverse insertion mode refers to transmitting the signal DP0 to the TX2 pin of the Type-C port 14 to transmit the signal DP0 to the RX1 lead of the Type-C port 110 through the reversed signal transmission line 200 Pass the signal DP1 to the RX2 pin of the Type-C port 14 to pass the signal DP1 to the TX1 pin of the Type-C port 110 through the signal transmission line 200; pass the signal DP2 to the Type-C port 14 TX1 pin, the signal DP2 is transmitted to the RX2 pin of the Type-C port 110 through the inverted signal transmission line 200; and the signal DP3 is transmitted to the RX1 pin of the Type-C port 14 to pass the signal transmission line 200 transmits the signal DP3 to the TX2 pin of the Type-C port 110. Accordingly, the processor 120 of the electronic device 100 can also receive the DisplayPort video signals DP0, DP1, DP2, and DP3 from the video signal source 13 from the RX1, TX1, RX2, and TX2 pins of the Type-C port 110, respectively.

It can be seen from the embodiments of FIGS. 4 and 5 that by floating one of the CC pins in the Type-C port 110 of the electronic device 100 and using the signal transmission line 200 with two CC lines Lcc to connect the electronic device 100 Connected to the external host 10, no matter whether the signal transmission line 200 is plugged in or plugged in, the electronic device 100 and the external host 10 are connected, the electronic device 100 can smoothly receive signals from the external host 10 without additional setting in the electronic device 100 Expensive multiplexer.

In the foregoing embodiment, the signal transmission line 200 is detachably connected between the external host 10 and the electronic device 100 at both ends. Therefore, two CC lines need to be provided in the signal transmission line 200 to achieve the above purpose. However, in some embodiments, as long as the signal transmission line is fixed to the Type-C port on the device side, and the CC line in the signal transmission line is electrically connected to the non-floating CC pin in the Type-C port, there is no need to Setting two CC lines in the signal transmission line can also achieve the above purpose.

6 is a block diagram of an electronic device according to an embodiment of the invention.

Please refer to FIG. 6, the electronic device 100 ′ is similar to the electronic device 100 in the embodiment of FIG. 3, in which the structure and functions of the Type-C port 110 ′, the processor 120 ′, the PD controller 130 ′ and the display 140 ′ are respectively It is similar to the Type-C port 110, the processor 120, the PD controller 130 and the display 140, so it will not be repeated here.

The difference between the electronic device 100' and the electronic device 100 is that the electronic device 100' further includes a signal transmission line fixed to the Type-C port 110'. The signal transmission line includes a Type-C connector 220' and a wire body 230', wherein the wire body 230' has only one CC line Lcc connected to the non-floating CC pin (for example, the CC1 pin in the electronic device 100' 111') and CC1 pin 221' of Type-C connector 220'.

In the embodiment of FIG. 6, there is no CC line connection between the CC pin floating in the electronic device 100' (e.g., the CC2 pin 112') and the CC2 pin 222' of the Type-C connector 220'. However, in other embodiments, a CC line may be connected between the CC pin floating in the electronic device 100' (for example, the CC2 pin 112') and the CC2 pin 222' of the Type-C connector 220' The present invention is not limited here.

FIG. 7 is a schematic diagram of an external host transmitting a signal to an electronic device by using the Type-C DisplayPort alternative mode when the signal transmission line is reversely inserted.

Referring to FIG. 7, the electronic device 100' uses a Type-C connector 220' to connect to the host 10, and receives signals from the host 10 (e.g., DisplayPort video signals DP0 to DP1). The host 10 is the same as the conventional host 10 in FIG. 1 and includes, for example, a USB host, a PD controller 11, a multiplexer 12, an image signal source 13, and a Type-C port 14. As shown in FIG. 7, the signal transmission line is reversely connected to the host 10, so the signal transmission line connects the TX1 pin of the Type-C port 14 to the RX2 pin of the Type-C port 110'; the Type-C The RX1 pin of port 14 is connected to the TX2 pin of Type-C port 110'; the TX2 pin of Type-C port 14 is connected to the RX1 pin of Type-C port 110'; and the Type-C The RX2 pin of the C port 14 is connected to the TX1 pin of the Type-C port 110'. In particular, the reversed signal transmission line will also connect the CC2 pin of Type-C port 14 to the CC1 pin 111 of Type-C port 110', but not the CC1 pin of Type-C port 14 To any pin.

Similar to the host 10 in FIG. 1, when the PD controller 11 detects the pull-down resistor Rd in the electronic device 100 ′ through the CC2 pin of the host 10, it instructs the multiplexer 12 to use the reverse insertion mode in the video signal source The signal is transmitted between 13 and Type-C port 14. With only one CC line Lcc connected, only the CC2 pin of the host 10 will detect the pull-down resistor Rd inside the CC1 pin 111' of the electronic device 100' and cause the multiplexer 12 to reverse the video signal in the reverse insertion mode The signal is transmitted between the source 13 and the Type-C port 14.

In some embodiments, the reverse insertion mode refers to transmitting the signal DP0 to the TX2 pin of the Type-C port 14 to transmit the signal DP0 to the RX1 lead of the Type-C port 110' through the reverse insertion signal transmission line Pass the signal DP1 to the RX2 pin of the Type-C port 14 to pass the signal DP1 to the TX1 pin of the Type-C port 110' through the signal transmission line; pass the signal DP2 to the Type-C port 14 The TX1 pin is used to pass the signal DP2 to the RX2 pin of the Type-C port 110' through the reversed signal transmission line; and the signal DP3 is passed to the RX1 pin of the Type-C port 14 to pass the signal transmission line Pass the signal DP3 to the TX2 pin of Type-C port 110'. According to this, the processor 120' of the electronic device 100' can also receive the DisplayPort video signals DP0, DP1, DP2 from the video signal source 13 from the RX1, TX1, RX2 and TX2 pins of the Type-C port 110' respectively DP3 without the participation of multiplexer.

To sum up, the electronic system and the electronic device proposed in the embodiments of the present invention can float one of the CC pins of the device side, so that the design of the signal source side (host side) can be eliminated without changing the number in the device side. The need for multiplexers, thereby reducing manufacturing costs. In addition, in the electronic system proposed by the embodiment of the present invention, there is a signal transmission line with a special design, in which a CC line is provided for both CC pins. According to this, no matter whether the detachable signal transmission line connects the signal source end and the device end with forward or reverse insertion, the signal can be smoothly transmitted between the signal source end and the device end without a digital multiplexer.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

10: Host 11, 21, 130, 130': PD controller 12, 22: Multiplexer 13: Video signal source 14, 24, 110, 110': Type-C port 20: Device 23: Video signal receiver 30: Type-C signal transmission line 100, 100': electronic device 111, 111', 211, 221, 221', CC1sr, CC1sk: CC1 pin 112, 112', 212, 222, 222', CC2sr, CC2sk: CC2 Pin 120: Processor 140: Display 200: Signal transmission line 210, 220, 220': Type-C connector 230, 230': Wire body DP0~DP3: DisplayPort video signal Lcc: CC line Rd: pull-down resistance Rp: top Pull resistance

FIG. 1 shows a schematic diagram of a conventional host transmitting a signal to a device through the Type-C DisplayPort alternative mode. FIG. 2 is a schematic diagram of a conventional Type-C CC connection circuit. 3 is a block diagram of an electronic system according to an embodiment of the invention. FIG. 4 illustrates a schematic diagram of an external host transmitting a signal to an electronic device by using the Type-C DisplayPort alternative mode when the signal transmission line is being inserted. FIG. 5 illustrates a schematic diagram of an external host transmitting a signal to an electronic device by using the Type-C DisplayPort replacement mode when the signal transmission line is reversely inserted. 6 is a block diagram of an electronic device according to another embodiment of the invention. 7 shows a schematic diagram of an external host transferring a signal to an electronic device by using the Type-C DisplayPort replacement mode when the signal transmission line is reversed in another embodiment of the present invention.

100: electronic device

110: Type-C port

111, 211, 221: CC1 pin

112, 212, 222: CC2 pin

120: processor

130: PD controller

140: display

200: signal transmission line

210, 220: Type-C connector

230: Wire body

Rd: pull-down resistor

Lcc: CC line

Claims (10)

An electronic device includes: a first Type-C port; and a processor coupled to the first Type-C port for receiving a signal from an external host through the first Type-C port , Where one of the two configuration channel pins of the first Type-C port is floating. The electronic device as described in item 1 of the patent application range, wherein the other one of the two configuration channel pins is electrically connected to one end of a resistor, and the other end of the resistor is grounded. The electronic device as described in item 1 of the patent application scope further includes: a display coupled to the processor, wherein the processor displays an image frame on the display according to the signal received from the external host. The electronic device as described in item 3 of the patent application scope, wherein a signal transmission mode of the signal is an alternative mode of Type-C DisplayPort. The electronic device as described in item 1 of the patent application scope, wherein the other one of the two configuration channel pins is coupled to a power transmission controller, wherein the power transmission controller is used to determine a signal transmission of the signal mode. The electronic device as described in item 1 of the patent application range, wherein the first Type-C port transmits the signal to the processor without passing through a multiplexer. The electronic device as described in any one of claims 1 to 6 further includes: a signal transmission line electrically connected to the first Type-C port unpluggably, wherein the first Type -C port is connected to a second Type-C port of the external host through the signal transmission line, wherein the signal transmission line electrically connects the non-floating configuration channel pin in the first Type-C port to One of the two configuration channel pins of the second Type-C port. The electronic device as described in item 7 of the patent application scope, wherein the electronic device is a head-mounted display. An electronic system, including the electronic device according to any one of claims 1 to 6, and a signal transmission line, wherein the signal transmission line is compatible with the first Type-C port, wherein the signal transmission line When one end of is connected to the first Type-C port, the two configuration channel pins of the first Type-C port are electrically connected to the other end of the signal transmission line. The electronic system as described in item 9 of the patent application scope, wherein when the signal transmission line is connected to the first Type-C port and a second Type-C port of the external host, the signal transmission line The two configuration channel pins of the two Type-C ports are electrically connected to the two configuration channel pins of the first Type-C port.

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