Display device and operating method for display device

Abstract

A display device and an operating method for the display device. The display device comprises an input port, an output port, a data port, a detection circuit, a processor and a connection prompt circuit; the detection circuit generates a first state value according to the connection state of the input port and generates a second state value according to the connection state of the output port. The processor generates a third state value according to the connection state of the data port; the processor judges the connection between the display device and the video source according to the first state value, the second state value and the third state value and provides a connection prompt signal; the connection prompt circuit responds to the connection prompt signal to control the display device to display a connection prompt picture. According to the display device, the connection result between the display device and the video source is judged according to the first state value, the second state value and the third state value, and the connection prompt picture is displayed according to the connection result, so that when the connection is wrong, the display device can provide the connection prompt picture to guide a user to carry out correct connection.

Description

Technical Field

[0001] The present invention relates to an electronic device and an operating method for the electronic device, and in particular to a display device and an operating method for the display device. Background Art

[0002] With the development of display device technology, there are more usage scenarios. The multi-screen connection of multiple display devices can bring a wide viewing angle, better immersion, and multi-window display and processing. The multi-screen connection of multiple display devices has become a necessary requirement for multi-business operations in industries such as office, games, and film and television. However, the appearance of the USB Type-C specification connection ports of the display devices is the same. It is difficult for users to identify the USB Type-C specification connection ports of the display devices. Therefore, the probability of connection errors will increase. In the case of a connection error, the display device can only display abnormal screens such as blue screens and black screens. The user can only keep groping or trying different connection methods until the display device and the audio and video source device (such as a display device that provides audio and video signals) are correctly connected and displayed normally. Therefore, the connection between the above-mentioned display device and the audio and video source device reduces the user's experience. It can be seen that how to provide a display system that can detect the connection status of the display device and provide a connection prompt screen based on the connection status is one of the research focuses of technicians in this field.

[0003] Therefore, it is necessary to provide a display device and an operating method for the display device to solve the above problems. Summary of the invention

[0004] The present invention provides a display device and an operating method for the display device, which can detect the connection status of the display device and provide a connection prompt screen according to the connection status.

[0005] The display device of the present invention includes an input port, an output port, a data port, a detection circuit, a processor, and a connection prompt circuit. The detection circuit is coupled to the input port and the output port. The detection circuit generates a first state value according to the connection state of the input port, and generates a second state value according to the connection state of the output port. The processor is coupled to the data port and the detection circuit. The processor generates a third state value according to the connection state of the data port. The processor reads the first state value and the second state value, and determines the connection between the display device and the audio and video source according to the first state value, the second state value, and the third state value and provides a connection prompt signal. The connection prompt circuit is coupled to the processor. The connection prompt circuit responds to the connection prompt signal to control the display device to display a connection prompt screen.

[0006] The operating method of the present invention is used for a display device. The display device includes an input port, an output port, a data port, and a detection circuit. The operating method includes: the detection circuit generates a first state value according to the connection state of the input port, and generates a second state value according to the connection state of the output port; determines the connection between the display device and the audio-visual source according to the first state value, the second state value, and the third state value corresponding to the connection state of the data port, and provides a connection prompt signal; and controls the display device to display a connection prompt screen in response to the connection prompt signal.

[0007] Based on the above, the display device confirms the connection result between the display device and the video source according to the first status value, the second status value and the third status value, and displays a connection prompt screen accordingly. In this way, in the case of a connection error, the display device can provide a connection prompt screen to guide the user to make a correct connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic diagram of a display device according to an embodiment of the present invention.

[0009] Figure 2 is a schematic diagram of an operating method according to an embodiment of the present invention.

[0010] Figure 3 is a schematic diagram of a display device according to an embodiment of the present invention.

[0011] Figure 4 It is a connection diagram according to an embodiment of the present invention.

[0012] Figure 5 It is a connection diagram according to an embodiment of the present invention.

[0013] Figure 6 It is a connection diagram according to an embodiment of the present invention.

[0014] Figure 7 It is a connection diagram according to an embodiment of the present invention.

[0015] Figure 8 is a state diagram according to an embodiment of the present invention.

[0016] Fig. 9 is a state diagram according to an embodiment of the present invention.

[0017] Fig.10 is a schematic diagram of an operating method according to an embodiment of the present invention.

[0018] Fig.11 It is a schematic diagram of a connection prompt screen according to an embodiment of the present invention.

[0019] Main component symbols:

[0020] 100, 200 Display device

[0021] 110, 210 detection circuit

[0022] 120 processors

[0023] 130 Connection reminder circuit

[0024] 211, 212 Controller

[0025] 300 video sources

[0026] DT1 First state value

[0027] DT2 Second state value

[0028] DT3 The third state value

[0029] IMGP connection prompt screen

[0030] PD Data Port

[0031] PI Input Port

[0032] PO Output port

[0033] RG1, RG2 Registers

[0034] S100, S200 operation method

[0035] Steps S110~S130, S210~S250

[0036] SST connection prompt signal

[0037] ST1 Normal state

[0038] ST2 Error connection status

[0039] SV video signal DETAILED DESCRIPTION

[0040] Some embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The referenced element symbols in the following description will be regarded as the same or similar elements when the same element symbols appear in different drawings. These embodiments are only part of the present invention and do not disclose all possible implementation methods of the present invention. More specifically, these embodiments are only examples within the scope of the patent application of the present invention.

[0041] Please also refer to Figure 1 as well as Figure 2 , Figure 1is a schematic diagram of a display device according to an embodiment of the present invention. Figure 2 is a schematic diagram of an operation method according to an embodiment of the present invention. In this embodiment, the display device 100 includes an input port PI, an output port PO, a data port PD, a detection circuit 110, a processor 120, and a connection prompt circuit 130. The operation method S100 is applicable to the display device 100. The operation method S100 includes steps S110 to S130. In this embodiment, the input port PI, the output port PO, and the data port PD are respectively audio and video connection ports of USB Type-C specifications.

[0042] In the present embodiment, the detection circuit 110 is coupled to the input port PI and the output port PO. In step S110, the detection circuit 110 generates a first state value DT1 according to the connection state of the input port PI, and generates a second state value DT2 according to the connection state of the output port PO. In other words, the first state value DT1 corresponds to the connection state of the input port PI. The second state value DT2 corresponds to the connection state of the output port PO. In the present embodiment, the first state value DT1 and the second state value DT2 can be connection state mark values, respectively (however, the present invention is not limited thereto).

[0043] In the present embodiment, the processor 120 is coupled to the data port PD and the detection circuit 110. The processor 120 generates a third state value DT3 according to the connection state of the data port PD. In other words, the third state value DT3 corresponds to the connection state of the data port PD. The processor 120 reads the first state value DT1 and the second state value DT2 in the detection circuit 110 in step S120. In step S120, the processor 120 also determines the connection between the display device 100 and the audio-visual source 300 according to the first state value DT1, the second state value DT2 and the third state value DT3, and provides a connection prompt signal SST. The connection prompt circuit 130 is coupled to the processor 120. In step S130, the connection prompt circuit 130 controls the display device 100 to display the connection prompt screen IMGP in response to the connection prompt signal SST. In the present embodiment, the third state value DT3 can be a connection state mark value (however, the present invention is not limited thereto).

[0044] The video source 300 may be a signal source device for providing a video signal SV. The video source 300 may be any type of electronic device capable of providing a video signal SV.

[0045] It is worth mentioning that the display device 100 confirms the connection result between the display device 100 and the video source 300 according to the first status value DT1, the second status value DT2 and the third status value DT3, and displays the connection prompt screen IMGP accordingly. In this way, in the case of a connection error, the display device 100 can provide the connection prompt screen IMGP to guide the user to make a correct connection.

[0046] For example, the input port PI and the output port PO are respectively video type connection ports of the USB Type-C specification. The data port PD is a data transfer only type connection port of the USB Type-C specification. The processor 120 determines whether the connection between the display device 100 and the audio-visual source 300 is wrong according to the first state value DT1, the second state value DT2, and the third state value DT3. When the connection between the display device 100 and the audio-visual source 300 is determined to be a connection error, the processor 120 provides a connection prompt signal SST corresponding to the connection error. The connection prompt circuit 130 controls the display device 100 to display the connection prompt screen IMGP in response to the connection prompt signal SST of the connection error. Therefore, the user can make a correct connection according to the connection prompt screen IMGP.

[0047] In this embodiment, the connection prompt screen IMGP is, for example, a pop-up prompt screen that displays how to correctly connect the video source 300 to the display device 100 in a "pop-up" manner (however, the present invention is not limited thereto). In this way, when a connection error occurs, the display device 100 can immediately "pop up" the connection prompt screen IMGP. The user can view the connection prompt screen IMGP and correctly connect the video source 300 to the display device 100.

[0048] On the other hand, when the connection between the display device 100 and the audio-visual source 300 is determined to be correctly connected, the processor 120 does not provide the connection prompt signal SST. Therefore, the connection prompt screen IMGP is not displayed. In some embodiments, when the connection between the display device 100 and the audio-visual source 300 is determined to be correctly connected, the processor 120 provides a connection prompt signal SST corresponding to the correct connection. Therefore, the display device 100 outputs a prompt screen for a correct connection.

[0049] When the connection is correct, the display device 100 receives the audio / video signal SV provided by the audio / video source 300 and operates according to the audio / video signal SV.

[0050] The processor 120 is, for example, a central processing unit (CPU), or other programmable general-purpose or special-purpose microprocessor, digital signal processor (DSP), programmable controller, application specific integrated circuits (ASIC), programmable logic device (PLD) or other similar devices or a combination of these devices, which can load and execute computer programs.

[0051] Please refer to Figure 3 , Figure 3 1 is a schematic diagram of a display device according to an embodiment of the present invention. In this embodiment, the display device 200 includes an input port PI, an output port PO, a data port PD, a detection circuit 210, a processor 120, and a connection prompt circuit 130. In this embodiment, the detection circuit 210 includes controllers 211 and 212. The controller 211 is coupled to the input port PI, the output port PO, and the processor 120. The controller 211 generates a first state value DT1 according to the connection state of the input port PI, and generates a second state value DT2 according to the connection state of the output port PO.

[0052] Taking this embodiment as an example, the controller 211 includes registers RG1 and RG2. The register RG1 stores a first state value DT1. The register RG2 stores a second state value DT2. The registers RG1 and RG2 may be memory segments at different addresses in a memory element. The registers RG1 and RG2 may be different memory elements.

[0053] In this embodiment, when the input port PI is not connected to the audio and video source, the first state value DT1 is equal to the first value. The first value is, for example, "0". When the input port PI receives the audio and video source, the first state value DT1 is equal to the second value. The second value is, for example, "1". When the output port PO does not receive the audio and video source, the second state value DT2 is equal to the first value. When the output port PO receives the audio and video source, the second state value DT2 is equal to the second value. For example, the controller 211 can use a setting circuit (not shown) to set the values ​​of the first state value DT1 and the second state value DT2.

[0054] The controller 212 is coupled to the input port PI, the output port PO, the controller 211 and the processor 120. The controller 212 determines the video signal (eg, Figure 1 The transmission direction of the audio and video signal SV) shown.

[0055] In this embodiment, the controller 211 may be a Power Delivery (PD) controller (but the present invention is not limited thereto). The controller 212 may be a Thunderbolt controller.

[0056] The processor 120 generates a third state value DT3 according to the connection state of the data port PD. When the data port PD does not receive the audio and video source, the third state value DT3 is equal to the first value. When the data port PD receives the audio and video source, the third state value DT3 is equal to the second value. Taking the present embodiment as an example, the data port PD is a data transfer only type connection port of the USB Type-C specification. The data port PD has a VBUS pin. Therefore, the processor 120, for example, determines whether the data port PD receives the audio and video source through the power (VBUS) pin of the data port PD, and generates the third state value DT3 accordingly. For further example, the processor 120 can, for example, determine whether the data port PD receives the audio and video source through the voltage level of the power (VBUS) pin of the data port PD.

[0057] In this embodiment, the controller 211 communicates with the processor 120 via an inter-integrated circuit (I2C) protocol. When at least one of the first state value DT1 and the second state value DT2 is changed, the controller 211 notifies the processor 120 to read the first state value DT1 and the second state value DT2.

[0058] The processor 120 reads the registers RG1 and RG2 to obtain the first state value DT1 and the second state value DT2. The processor 120 determines the first state value DT1, the second state value DT2, and the third state value DT3. In this embodiment, when the first state value DT1, the second state value DT2, and the third state value DT3 are all equal to the first value, the input port PI, the output port PO, and the data port PD of the display device 200 are not connected to the video source. Therefore, the processor 120 determines that the display device 200 is not connected to the video source.

[0059] Please refer to Figure 4 , Figure 4 It is a connection diagram according to an embodiment of the present invention. Figure 4An example of a correct connection is shown. In this embodiment, the input port PI of the display device 200 is connected to the audio and video source 300. Therefore, the controller 211 changes the first state value DT1 stored in the register RG1 to the second value (such as "1"), maintains the second state value DT2 stored in the register RG2 to the first value (such as "0"), and notifies the processor 120. The processor 120 reads the first state value DT1 and the second state value DT2. When the first state value DT1 is equal to the second value and the second state value DT2 is equal to the first value, the processor 120 knows that the input port PI is connected to the audio and video source 300, and determines that the connection between the display device 200 and the audio and video source 300 is correct. The display device 200 can correctly receive the audio and video signal SV through the input port PI. The processor 120 does not provide a connection prompt signal SST.

[0060] Please refer to Figure 5 , Figure 5 It is a connection diagram according to an embodiment of the present invention. Figure 5 An example of incorrect connection is shown. In the present embodiment, the output port PO of the display device 200 is connected to the audio-visual source 300. Therefore, the controller 211 maintains the first state value DT1 stored in the register RG1 at the first value (such as "0"), changes the second state value DT2 stored in the register RG2 to the second value (such as "1"), and notifies the processor 120. The processor 120 reads the first state value DT1 and the second state value DT2. When the first state value DT1 is equal to the first value and the second state value DT2 is equal to the second value, the processor 120 learns that the output port PO is connected to the audio-visual source 300, and determines that the connection between the display device 200 and the audio-visual source 300 is incorrect. The processor 120 provides a connection prompt signal SST.

[0061] Please refer to Figure 6 , Figure 6 It is a connection diagram according to an embodiment of the present invention. Figure 6 An example of an incorrect connection is shown. In the present embodiment, the display device 200 is connected to the audio-visual source 300 only through the data port PD. Therefore, the controller 211 sets the first state value DT1 stored in the register RG1 to the first value (such as "0") and the second state value DT2 stored in the register RG2 to the first value. However, the processor 120 learns that the third state value DT3 is equal to the second value (such as "1"). Therefore, when the first state value DT1 is equal to the first value and the third state value DT3 is equal to the second value, the processor 120 learns that the display device 200 is connected to the audio-visual source 300 only through the data port PD. The processor 120 determines that the connection between the display device 200 and the audio-visual source 300 is incorrect. The processor 120 provides a connection prompt signal SST.

[0062] Please refer to Figure 7 , Figure 7 It is a connection diagram according to an embodiment of the present invention. Figure 7 An example of a correct connection is shown. In the present embodiment, the display device 200 is connected to the audio-visual source 300 through the input port PI and the data port PD. Therefore, the controller 211 changes the first state value DT1 stored in the register RG1 to the second value (such as "1"), maintains the second state value DT2 stored in the register RG2 to the first value (such as "0"), and notifies the processor 120. The processor 120 reads the first state value DT1 and the second state value DT2, and learns that the third state value DT3 changes to the second value. Therefore, when the first state value DT1 and the third state value DT3 are both equal to the second value, the processor 120 learns that the display device 200 is connected to the audio-visual source 300 through the input port PI and the data port PD, and determines that the connection between the display device 200 and the audio-visual source 300 is correct. The processor 120 does not provide a connection prompt signal SST.

[0063] Please also refer to Figure 1 as well as Figure 8 , Figure 8 is a state diagram according to an embodiment of the present invention. Figure 8 1 shows the normal state ST1 and the wrong connection state ST2 of the display device 100. In this embodiment, the processor 120 can determine the state transition between the normal state ST1 and the wrong connection state ST2 according to the first state value DT1, the second state value DT2 and the third state value DT3. In the normal state ST1, when the first state value DT1 is equal to the first value (i.e., "0") and the second state value DT2 is equal to the second value (i.e., "1"), the processor 120 determines that the display device 100 enters the wrong connection state ST2 from the normal state ST1.

[0064] In the normal state ST1 , when the first state value DT1 is equal to the first value and the third state value DT3 is equal to the second value, the processor 120 determines that the display apparatus 100 enters the wrong connection state ST2 from the normal state ST1 .

[0065] In addition, in the normal state ST1, when the first state value DT1, the second state value DT2, and the third state value DT3 are all equal to the first value, the processor 120 determines that the display device 100 is not connected to the video source 300. The display device 100 is not connected to the video source 300, which also belongs to the normal state ST1. Therefore, the processor 120 determines that the display device 100 is maintained in the normal state ST1.

[0066] In this embodiment, in the wrong connection state ST2, the display device 100 provides a connection prompt signal. Therefore, the connection prompt circuit 130 controls the display device 100 to display the connection prompt screen IMGP in response to the connection prompt signal SST in step S130.

[0067] Please refer to the reference Figure 1 as well as Fig. 9 , Fig. 9 is a state diagram according to an embodiment of the present invention. Fig. 9 The normal state ST1 and the wrong connection state ST2 of the display device 100 are shown. In this embodiment, in the wrong connection state ST2, when the first state value DT1 and the second state value DT2 are both equal to the first value (i.e., "0"), the processor 120 determines that the display device 100 enters the normal state ST1 from the wrong connection state ST2.

[0068] In the wrong connection state ST2 , when the first state value DT1 and the third state value DT3 are both equal to the first value, the processor 120 determines that the display device 100 enters the normal state ST1 from the wrong connection state ST2 .

[0069] In the error connection state ST2, when the first state value DT1 and the third state value DT3 are both equal to the second value (ie, "1"), it indicates that the connection between the display device 100 and the video source 300 is correct. The processor 120 determines that the display device 100 enters the normal state ST1 from the error connection state ST2.

[0070] It should be understood that the determination of the state transition between the normal state ST1 and the wrong connection state ST2 can also be applied to the following examples: Figure 3 The display device 200 is shown.

[0071] Please refer to the reference Figure 1 , Figure 8 , Fig. 9 as well as Fig.10 , Fig.10is a schematic diagram of an operation method according to an embodiment of the present invention. The operation method S200 is applicable to the display device 100. In this embodiment, the operation method S200 includes steps S210 to S250. The processor 120 can sequentially determine the connection status of the input port PI, the output port PO, and the data port PD based on the operation method S200. The operation method S200 starts from the normal state ST1. The processor 120 determines whether the input port PI is connected in step S210. In this embodiment, the processor 120 can use the first state value DT1 to determine whether the input port PI is connected in step S210. When the first state value DT1 is equal to the second value (such as "1"), the processor 120 determines that the input port PI is connected to the audio-visual source 300. The connection between the display device 100 and the audio-visual source 300 is correct. Therefore, the processor 120 determines that the current connection state is the normal state ST1 in step S240.

[0072] On the other hand, in step S210 , when the first state value DT1 is equal to the first value (eg “0”), the processor 120 determines that the input port PI is not connected to the video source 300 , and determines whether the output port PO is connected in step S220 .

[0073] In step S220, the processor 120 may use the second state value DT2 to determine whether the input port PI is connected. In step S220, when the second state value DT2 is equal to the second value (such as "1"), this indicates that the input port PI is not connected to the video source 300, while the output port PO is connected to the video source 300. Therefore, the processor 120 determines in step S250 that the current connection state is the wrong connection state ST2. Next, the operation method S200 returns to the operation of step S210.

[0074] On the other hand, in step S220, when the second state value DT2 is equal to the first value (such as "0"), the processor 120 determines that the input port PI and the output port PO are not connected to the audio and video source 300, and determines whether the data port PD is connected in step S230.

[0075] In step S230, the processor 120 may use the third state value DT3 to determine whether the data port PD is connected. In step S230, when the third state value DT3 is equal to the second value (such as "1"), this means that the input port PI and the output port PO are not connected to the audio-visual source 300, but the data port PD is connected to the audio-visual source 300. Therefore, the processor 120 determines in step S250 that the current connection state is the wrong connection state ST2. Next, the operation method S200 returns to the operation of step S210.

[0076] On the other hand, in step S230, when the third state value DT3 is equal to the first value (such as "0"), it means that the input port PI, the output port PO and the data port PD are not connected to the video source 300. Therefore, the processor 120 determines that the current state is the normal state ST1 in step S240. Next, the operation method S200 returns to the operation of step S210.

[0077] Based on the above, the determination of the normal state ST1 and the error connection state ST2 can be summarized as Table 1 and Table 2. The processor 120 can also determine the current connection state according to Table 1 and Table 2.

[0078] Table 1:

[0079]

[0080] Table 2:

[0081]

[0082] Please also refer to Figure 1 as well as Fig.11 , Fig.11 1 is a schematic diagram of a connection prompt screen according to an embodiment of the present invention. In this embodiment, when the input port PI is not connected to the audio-visual source 300 and the output port PO is connected to the audio-visual source 300, the processor 120 determines that the above connection is wrong. Therefore, the processor 120 provides a corresponding connection status signal SST. The connection prompt circuit 130 receives the connection status signal SST. The connection prompt circuit 130 controls the display device 100 according to the connection status signal SST. Therefore, the display device 100 displays the connection prompt screen IMGP to guide the user to make a correct connection.

[0083] In this embodiment, the connection prompt screen IMGP includes five prompt parts P1 to P6. The prompt part P1 displays an explanation of the incorrect connection of the video source 300 to the output port PO. For example, the prompt part P1 displays text about the incorrect connection of the video source 300 to the output port PO.

[0084] The prompt part P2 shows that the current audio-visual source 300 is connected to the output port PO by an incorrect connection. For example, the prompt part P2 shows that the current audio-visual source 300 is connected to the output port PO by an incorrect connection in a graphical manner. For another example, the prompt part P1 shows that the current audio-visual source 300 is connected to the output port PO by an incorrect connection in a text manner.

[0085] The prompt part P3 displays the correct connection method between the display device 100 and the audio-visual source 300. For example, the prompt part P3 displays the correct connection method between the input port PI and the audio-visual source 300 in a graphical manner. For another example, the prompt part P3 displays the correct connection method between the input port PI and the audio-visual source 300 in a textual manner. The prompt part P4 displays an icon of the switching direction. The switching direction in the prompt part P4 is from the prompt part P2 to the prompt part P3. Therefore, the user can intuitively know that the incorrect connection of the prompt part P2 must be changed to the correct connection of the prompt part P3. The prompt part P6 displays the data port PD.

[0086] The prompt part P5 displays the relative position information of the input port PI, the output port PO, and the data port PD. For example, the prompt part P5 displays the relevant information about the "front" of the display device 100. With respect to the front of the display device 100, the output port PO is located to the right of the input port PI, and the input port PI is located to the right of the data port PD. Therefore, the user can clearly know the relative positions of the input port PI, the output port PO, and the data port PD according to the connection prompt screen IMGP.

[0087] In summary, the display device of the present invention determines the connection result between the display device and the video source according to the first status value, the second status value and the third status value, and displays a connection prompt screen accordingly. In this way, in the case of a connection error, the display device can provide a connection prompt screen to guide the user to make a correct connection.

[0088] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art should be able to make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the attached claims.

Claims

1. A display device, comprising: an input port; an output port; A data port; a detection circuit coupled to the input port and the output port, configured to generate a first state value according to a connection state of the input port, and to generate a second state value according to a connection state of the output port; a processor coupled to the data port and the detection circuit, configured to generate a third status value according to a connection status of the data port, read the first status value and the second status value, and determine the connection between the display device and an audio-visual source according to the first status value, the second status value and the third status value and provide a connection prompt signal; as well as A connection prompt circuit is coupled to the processor and is configured to control the display device to display a connection prompt screen in response to the connection prompt signal.

2. The display device according to claim 1, wherein: The input port and the output port are respectively video type connection ports of USB Type-C specification, and This data port is a data transfer-only type connection port of the USB Type-C specification. 3 . The display device as claimed in claim 1 , wherein the processor determines whether the data port receives the video and audio source through a power pin of the data port, and generates the third status value accordingly.

4. The display device according to claim 1, wherein: The processor determines whether the connection between the display device and the video and audio source is wrong according to the first status value, the second status value and the third status value, and When the connection between the display device and the audio-visual source is determined to be erroneous, the processor provides the connection prompt signal.

5. The display device according to claim 1, wherein: When the input port is not connected to the audio and video source, the first state value is equal to a first value. When the input port receives the video and audio source, the first state value is equal to a second value. When the output port does not receive the video and audio source, the second state value is equal to the first value. When the output port receives the video and audio source, the second state value is equal to the second value, When the data port does not receive the video and audio source, the third state value is equal to the first value, and When the data port receives the audio and video source, the third state value is equal to the second value. 6 . The display device as claimed in claim 5 , wherein when the first status value is equal to the first value and the second status value is equal to the second value, the processor determines that the connection between the display device and the video and audio source is incorrect. 7 . The display device as claimed in claim 5 , wherein when the first status value is equal to the first value and the third status value is equal to the second value, the processor determines that the connection between the display device and the video and audio source is incorrect. 8 . The display device as claimed in claim 5 , wherein when the first status value is equal to the second value, the processor determines that the connection between the display device and the video and audio source is correct. 9 . The display device as claimed in claim 5 , wherein when the first status value is equal to the second value and the third status value is equal to the second value, the processor determines that the connection between the display device and the video and audio source is correct.

10. The display device as claimed in claim 1, wherein the detection circuit comprises: a first controller coupled to the input port, the output port and the processor, and configured to generate a first status value according to a connection status of the input port, and to generate a second status value according to a connection status of the output port; as well as A second controller is coupled to the input port, the output port, the first controller and the processor, and is configured to determine a transmission direction of the audio and video signal of the audio and video source according to the first status value and the second status value.

11. The display device as claimed in claim 10, wherein the first controller comprises: a first register configured to store the first state value; as well as A second register is configured to store the second state value.

12. An operating method for a display device, wherein the display device comprises an input port, an output port, a data port and a detection circuit, wherein the operating method comprises: The detection circuit generates a first state value according to the connection state of the input port, and generates a second state value according to the connection state of the output port; Determining the connection between the display device and an audio-visual source according to the first status value, the second status value, and a third status value corresponding to the connection status of the data port and providing a connection prompt signal; as well as The display device is controlled to display a connection prompting picture in response to the connection prompting signal.

13. The operating method as claimed in claim 12, wherein the data port is a data transmission only type connection port of USB Type-C specification, wherein the operating method further comprises: A power pin of the data port is used to determine whether the data port receives the video and audio source, and the third state value is generated accordingly.

14. The operating method of claim 12, wherein the step of determining the connection between the display device and the video and audio source and providing a connection prompt signal according to the first status value, the second status value, and the third status value corresponding to the connection status of the data port comprises: Determining whether the connection between the display device and the video and audio source is wrong according to the first status value, the second status value, and the third status value; as well as When the connection between the display device and the video and audio source is determined to be wrong, the connection prompt signal is provided.

15. The operating method according to claim 12, wherein: When the input port is not connected to the audio and video source, the first state value is equal to a first value. When the input port receives the video and audio source, the first state value is equal to a second value. When the output port does not receive the video and audio source, the second state value is equal to the first value. When the output port receives the video and audio source, the second state value is equal to the second value, When the data port does not receive the video and audio source, the third state value is equal to the first value, and When the data port receives the audio and video source, the third state value is equal to the second value.

16. The operating method of claim 15, wherein the step of determining the connection between the display device and the video and audio source and providing a connection prompt signal according to the first status value, the second status value, and the third status value corresponding to the connection status of the data port comprises: When the first state value is equal to the first value and the second state value is equal to the second value, it is determined that the connection between the display device and the audio-visual source is incorrect.

17. The operating method of claim 15, wherein the step of determining the connection between the display device and the video and audio source and providing a connection prompt signal according to the first status value, the second status value, and the third status value corresponding to the connection status of the data port comprises: When the first state value is equal to the first value and the third state value is equal to the second value, it is determined that the connection between the display device and the audio-visual source is incorrect.

18. The operating method of claim 15, wherein the step of determining the connection between the display device and the video and audio source and providing a connection prompt signal according to the first status value, the second status value, and the third status value corresponding to the connection status of the data port comprises: When the first status value is equal to the second value, it is determined that the connection between the display device and the video and audio source is correct.

19. The operating method of claim 15, wherein the step of determining the connection between the display device and the video and audio source and providing a connection prompt signal according to the first status value, the second status value, and the third status value corresponding to the connection status of the data port comprises: When the first state value is equal to the second value and the third state value is equal to the second value, it is determined that the connection between the display device and the audio-visual source is correct.

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