Three-in-one multimedia cable and electronic drawing board system

Abstract

Disclosed are a three-in-one multimedia cable and an electronic drawing board system. The three-in-one multimedia cable includes a USB-type-C plug, an HDMI plug, a USB-type-A plug, and a power supply plug, the USB-type-C plug is connected to the HDMI plug, the USB-type-A plug, and the power supply plug respectively. The electronic drawing board system includes the three-in-one multimedia cable, a USB-type-C socket, an analog switch, and an electromagnetic screen module, the USB-type-C plug of the multimedia cable is connected to the USB-type-C socket, an output end of the USB-type-C socket is connected to an input end of the analog switch, and an output end of the analog switch is connected to an input end of the electromagnetic screen module. The three-in-one multimedia cable can reduce the number of cables, which is convenient for users to use, and can be widely applied to the field of data cables.

Claims

1. A three-in-one multimedia cable, comprising: a USB-type-C plug; an HDMI plug; a USB-type-A plug; and a power supply plug; wherein the USB-type-C plug comprises A1 to A12 pins and B1 to B12 pins, wherein the A2 pin and the A3 pin form a first differential pin group, the B2 pin and the B3 pin form a second differential pin group, the A6 pin and the A7 pin form a third Differential pin group, the B6 pin and the B7 pin form a fourth differential pin group, the A10 pin and the A11 pin form a fifth differential pin group, and the B10 pin and the B11 pin form a sixth differential pin group; the HDMI plug comprises a seventh differential pin group, an eighth differential pin group, a ninth differential pin group, a tenth differential pin group, a hot plug detection pin, a serial data pin, and a serial clock pin and a 5V power input pin; and the USB-type-A plug comprises an eleventh differential pin group; wherein the seventh differential pin group is connected to the first differential pin group, the eighth differential pin group is connected to the second differential pin group, the ninth differential pin group is connected to the fifth differential pin group, the tenth differential pin group is connected to the six differential pin group, and the eleventh differential pin group is respectively connected to the third differential pin group and the fourth differential pin group; wherein a positive power pin of the USB-type-A plug and a positive power pin of the power supply plug are both connected to at least one of the A4 pin, the B4 pin, the A9 pin and the B9 pin of the USB-type-C plug; wherein a ground pin of the USB-type-A plug, a ground pin of the power supply plug and a ground pin of the HDMI plug are all connected to at least one of the A1 pin, the B1 pin, the A12 pin and the B12 pin of the USB-type-C plug; the 5V power input pin, the hot plug detection pin, the serial data pin, and the serial clock pin are all connected to one of the A5 pin, the B5 pin, the A8 pin, and the B8 pin of the USB-type-C plug.

2. The three-in-one multimedia cable of claim 1, wherein the power supply plug is a USB-type-A plug.

3. The three-in-one multimedia cable of claim 1, wherein an adapter plate is arranged in the HDMI plug, and the USB-type-C plug is respectively connected to the HDMI plug, the USB-type-A plug and the power supply plug through the adapter plate.

4. The three-in-one multimedia cable of claim 1, wherein the hot plug detection pin is connected to the A5 pin, and the 5V power input pin is connected to the B5 pin.

5. The three-in-one multimedia cable of claim 1, wherein the serial data pin is connected to the A8 pin, and the serial clock pin is connected to the B8 pin.

6. The three-in-one multimedia cable of claim 1, wherein one of the seventh differential pin group, the eighth differential pin group, the ninth differential pin group and the tenth differential pin group is a differential clock pin group.

7. The three-in-one multimedia cable of claim 1, wherein the eleventh differential pin group comprises a D+ pin and a D− pin of the USB-type-A plug, wherein the D+ pin is connected to the A6 pin and the B6 pin, and the D− pin is connected to the A7 pin and the B7 pin.

8. An electronic drawing board system, comprising: a USB-type-C socket; an analog switch; an electromagnetic screen module; and the three-in-one multimedia cable of claim 1; wherein a USB-type-C plug of the multimedia cable is connected to the USB-type-C socket, an output end of the USB-type-C socket is connected to an input end of the analog switch, and an output end of the analog switch is connected to an input end of the electromagnetic screen module; wherein the analog switch is configured to detect a position of a pin of the USB-type-C plug connected to the 5V power input pin, and switch a connection relationship between the USB-type-C socket and the electromagnetic screen module according to a detection result.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is an appearance structure diagram of a three-in-one multimedia cable according to the present invention;

(2) FIG. 2 is a definition diagram of standard pins of USB-type-C;

(3) FIG. 3 is a module block diagram of an electronic drawing board system according to the present invention; and

(4) FIG. 4 is a schematic diagram of an analog switch according to the present invention.

DETAILED DESCRIPTION

(5) Referring to FIG. 1, a three-in-one multimedia cable, including a USB-type-C plug, an HDMI plug, a USB-type-A plug and a power supply plug, where the USB-type-C plug includes A1 to A12 pins and B1 to B12 pins, wherein the A2 pin and the A3 pin form a first differential pin group, the B2 pin and the B3 pin form a second differential pin group, and the A6 pin and the A7 pin form a third differential pin group, the B6 pin and the B7 pin form a fourth differential pin group, the A10 pin and the A11 pin form a fifth differential pin group, and the B10 pin and the B11 pin form a sixth differential pin group; the HDMI plug includes a seventh differential pin group, an eighth differential pin group, a ninth differential pin group, a tenth differential pin group, a hot plug detection pin, a serial data pin, and a serial clock pin and a 5V power input pin; and the USB-type-A plug includes an eleventh differential pin group;

(6) the seventh differential pin group is connected to the first differential pin group, the eighth differential pin group is connected to the second differential pin group, the ninth differential pin group is connected to the fifth differential pin group, the tenth differential pin group is connected to the six differential pin group, and the eleventh differential pin group is respectively connected to the third differential pin group and the fourth differential pin group; a positive power pin of the USB-type-A plug and a positive power pin of the power supply plug are both connected to at least one of the A4 pin, the B4 pin, the A9 pin, and the B9 pin of the USB-type-C plug; a ground pin of the USB-type-A plug, a ground pin of the power supply plug and a ground pin of the HDMI plug are all connected to at least one of the A1 pin, the B1 pin, the A12 pin and the B12 pin of the USB-type-C plug; the 5V power input pin, the hot plug detection pin, the serial data pin and the serial clock pin are all connected to at least one of the A5 pin, the B5 pin, the A8 pin and the B8 pin of the USB-type-C plug, and the 5V power input pin, the hot plug detection pin, the serial data pin and the serial clock pin are not connected to each other. Generally, in order to ensure the power supply capacity and anti-interference ability of the multimedia cable, the A4 pin, the B4 pin, the A9 pin and the B9 pin are all connected to the positive power pin of the USB-type-A plug and the positive power pin of the power plug. Similarly, the A1 pin, the B1 pin, the A12 pin, and the B12 pin are all connected to the ground pin of the USB-type-A plug, the ground pin of the power supply plug, and the ground pin of the HDMI plug. However, those skilled in the art may only connect some pins as appropriate.

(7) Referring to FIG. 1, further, as a preferred embodiment, the power supply plug is a USB-type-A plug.

(8) Further, as a preferred embodiment, an adapter plate is arranged in the HDMI plug, and the USB-type-C plug is respectively connected to the HDMI plug, the USB-type-A plug and the power supply plug through the adapter plate.

(9) Further, as a preferred embodiment, the hot plug detection pin is connected to the A5 pin, and the 5V power input pin is connected to the B5 pin.

(10) Further, as a preferred embodiment, the serial data pin is connected to the A8 pin, and the serial clock pin is connected to the B8 pin.

(11) Further, as a preferred embodiment, one of the seventh differential pin group, the eighth differential pin group, the ninth differential pin group, and the tenth differential pin group is a differential clock pin group.

(12) Further, as a preferred embodiment, the eleventh differential pin group includes a D+ pin and a D− pin of the USB-type-A plug, wherein the D+ pin is connected to the A6 pin and the B6 pin, and the D− pin is connected to the A7 pin and the B7 pin.

(13) Referring to FIG. 3, an electronic drawing board system, including a USB-type-C socket, an analog switch, an electromagnetic screen module and a three-in-one multimedia cable, wherein a USB-type-C plug of the multimedia cable is connected to the USB-type-C socket, an output end of the USB-type-C socket is connected to an input end of the analog switch, and an output end of the analog switch is connected to an input end of the electromagnetic screen module.

(14) The present invention will be further described below with reference to the drawings and specific embodiments of the description.

(15) Referring to FIG. 1, a three-in-one multimedia cable is disclosed, which includes a USB-type-C plug 100, an HDMI plug 200, a USB-type-A plug 300, and a power supply plug 400. An adapter plate is arranged in the HDMI plug 200, and the USB-type-C plug 100 is respectively connected to the HDMI plug 200, the USB-type-A plug 300 and the power supply plug 400 through the adapter plate in the HDMI plug 200. Except for the HDMI plug, other plugs are connected to the adapter plate through cables (the HDMI plug may be directly welded to the adapter plate). The adapter plate is arranged in the HDMI plug 200 because the HDMI plug has a large volume and can accommodate a PCB board.

(16) The purpose of adding the power supply plug 400 in the present invention is to provide a large enough current for the electronic drawing board (generally the power supply of a USB interface of a computer does not exceed 500 mA, which is not large enough to drive the electronic drawing board). The power supply plug 400 may be implemented by a USB-type-A plug, so as to be directly plugged into the USB of the computer, power bank or charging socket to obtain current.

(17) The connection relationship between multiple plugs in this embodiment is shown in Table 1.

(18) TABLE-US-00001 TABLE 1 pin definition pin definition A1 GND B1 GND A2 HDMI-D0+ (positive B2 HDMI-CLK+ (positive phase of data phase of clock differential pin) differential pin) A3 HDMI-D0−(negative B3 HDMI-CLK+ (positive phase of data phase of clock differential pin) differential pin) A4 5 V IN B4 5 V IN A5 HDMI-HPD (hot plug B5 HDMI-5 V (5 V power detection pin) input pin) A6 USB-D+ (positive B6 USB-D+ (positive phase of data phase of data differential pin) differential pin) A7 USB-D− (negative B7 USB-D− (negative phase of data phase of data differential pin) differential pin) A8 HDMI-SCL (serial B8 HDMI-SDA (serial clock pin) data pin) A9 5 V IN B9 5 V IN A10 HDMI-D2− (negative B10 HDMI-D1− (negative phase of differential phase of differential pin) pin) A10 HDMI-D2+ (positive B11 HDMI-D1+ (positive phase of differential phase of differential pin) pin) A12 GND B12 GND

(19) In Table 1, the header item “pin” refers to pins on the USB-type-C plug, and the header item “definition” refers to pins of the HDMI plug, the USB-type-A plug or the power supply plug respectively connected to pins of the USB-type-C plug. In Table 1, the items prefixed with “USB” indicate pins of the USB-type-A plug, and the items prefixed with “HDMI” indicate pins of the HDMI plug. The plugs have a common ground connection, and “5V IN” indicates the positive power pin of the plugs except the HDMI plug. In Table 1, A2 and A3, B2 and B3, A6 and A7, B6 and B7, A10 and A11, and B10 and B11 are differential data pin groups. Referring to Table 1 and FIG. 2, it can be known that the connection relationship between the USB-type-A plug and the USB-type-C plug of the present invention does not change the standard pin definition of the USB-type-C, so it may be used as ordinary USB data cable in the present invention. Furthermore, in the present invention, the remaining differential data pins of the USB-type-C and other pins are also utilized to realize the integration of the HDMI interface. Since the USB-type-C plug has no distinction between the front and the back, and the pins of HDMI in this embodiment are not symmetrically distributed, the electronic drawing board using the data cable in this embodiment may be provided with an analog switch, which is used to detect a 5V power input of the HDMI interface, and determine to switch the internal connection relationship of the electronic drawing board according to the position of the 5V power input pin of the HDMI plug. For example, when the 5V power input pin is connected to the B5 pin, the analog switch only needs to detect which of the A5 pin and the B5 pin of the USB-type-C plug is 5V to know the insertion direction of the USB-type-C plug. At this time, the analog switch switches the connection relationship between the USB-type-C plug and the electronic drawing board display screen according to the detection result.

(20) In addition, in other embodiments, the connection relationship between the HDMI plug and the USB-type-C plug may be adjusted according to actual needs. For example, HDMI-SCL and HDMI-SDA may be interchanged, or the positions of multiple differential pins may be interchanged.

(21) Referring to FIG. 3, an electronic drawing board system is provided, which includes the three-in-one multimedia cable as shown in FIG. 1, a USB-type-C socket, an analog switch and an electromagnetic screen module. A USB-type-C plug of the multimedia cable is connected to the USB-type-C socket, an output end of the USB-type-C socket is connected to an input end of the analog switch, and an output end of the analog switch is connected to an input end of the electromagnetic screen module.

(22) FIG. 4 shows a schematic diagram of an analog switch. A switch S1 and a switch S2 are controlled by an input level of an interface D. When the interface D is connected to HDMI-5V in FIG. 4, the states of the switch S1 and the switch S2 are shown in FIG. 4. The A10 pin of the USB-type-C plug (socket) is connected to an A10′ pin of the electromagnetic screen module of the electronic drawing board, and the B10 pin is connected to a B10′ pin. When the USB-type-C plug is inserted in the reverse direction and the interface D does not detect HDMI-5V high level (or when other detection interfaces detect HDMI-5V high level), the states of the switch S1 and the switch S2 will change, that is, the A10 pin is connected to the B10′ pin, and the B10 pin is connected to the A10′ pin. In this embodiment, the connection relationship between the multimedia cable and the electromagnetic screen module is automatically switched by detecting the position of the HDMI-5V, so that the USB-type-C interface may be inserted and used regardless of the front and back, which is further convenient for the users to use. After the cable is designed, the function of its pin is determined. Therefore, in practical applications, those skilled in the art only need to redesign the connection relationship between the analog switch and the USB-type-C socket according to the actual situation. In the present invention, the specific connection relationship between the analog switch and the USB-type-C socket and the specific connection relationship between the analog switch and the electromagnetic screen module are not restricted, and the specific model and quantity of the analog switch are not restricted.

(23) The above is a detailed description of the preferred embodiments of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without departing from the concept of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.