Display apparatus and operating method for a display apparatus

Abstract

A display device and an operating method thereof. The display device includes 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 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 determines the connection between the display device and the audio / 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 controls the display device to display a connection prompt picture according to the connection prompt signal. The display device of the present application determines the connection result between the display device and the audio / video source according to the first state value, the second state value and the third state value and displays a connection prompt picture accordingly, so that when the connection is incorrect, the display device can provide a connection prompt picture to guide the user to make correct connection.

Description

Technical Field

[0001] The present invention relates to an electronic device and a method of operating the electronic device, and more particularly to a display device and a method of operating the display device. Background Technology

[0002] With the development of display device technology, more application scenarios have emerged. Multi-screen connections of multiple display devices can bring a wider viewing angle, better immersion, and multi-window display and processing. Multi-screen connections of multiple display devices have become an essential requirement for multi-business operations in industries such as office work, gaming, and film and television. However, the USB Type-C connection ports of display devices all look the same. Users find it difficult to identify the correct USB Type-C connection port. Therefore, the probability of connection errors increases. In the event of a connection error, the display device can only display abnormal images such as blue screens or black screens. Users can only keep trying different connection methods until the display device and the audio-visual source device (e.g., the display device providing the audio-visual signal) are correctly connected and display normally. Therefore, the connection between the display device and the audio-visual source device degrades the user experience. Therefore, how to provide a display system that can detect the connection status of the display device and provide connection prompts based on the connection status is one of the key research focuses for those skilled in the art.

[0003] Therefore, there is a need 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 operation method for the display device, which can detect the connection status of the display device and provide a connection prompt screen based on 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 based on the connection state of the input port and a second state value based on 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 based on the connection state of the data port. The processor reads the first and second state values ​​and determines the connection between the display device and the audio / video source based on the first, second, and third state values, 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 in 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 generating a first state value based on the connection state of the input port, and generating a second state value based on the connection state of the output port; determining a connection between the display device and an audio / video source based on the first state value, the second state value, and a third state value corresponding to the connection state of the data port, and providing a connection prompt signal; and controlling 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 audio / video source according to the first state value, the second state value, and the third state value, and displays a connection prompt screen accordingly. In this way, in the event of a connection error, the display device can provide a connection prompt screen to guide the user to connect correctly. Attached Figure Description

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

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

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

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

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

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

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

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

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

[0017] Figure 10 This is a schematic diagram illustrating an operation method according to an embodiment of the present invention.

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

[0019] Explanation of key component symbols:

[0020] 100, 200 display devices

[0021] 110 and 210 detection circuits

[0022] 120 processor

[0023] 130 Connection prompt circuit

[0024] 211, 212 Controllers

[0025] 300 video sources

[0026] DT1 First state value

[0027] DT2 Second State Value

[0028] DT3 Third State Value

[0029] IMGP connection prompt screen

[0030] PD data port

[0031] PI input port

[0032] PO output port

[0033] RG1 and RG2 registers

[0034] S100, S200 Operating Methods

[0035] S110~S130, S210~S250 Steps

[0036] SST connection prompt signal

[0037] ST1 Normal state

[0038] ST2 Error Connection Status

[0039] SV audio / video signal Detailed Implementation

[0040] Some embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Component symbols used in the following description, when appearing in different drawings, are considered to be the same or similar components. These embodiments are only a part of the present invention and do not disclose all possible implementations of the invention. More precisely, these embodiments are merely examples within the scope of the present invention's patent application.

[0041] Please also refer to Figure 1 as well as Figure 2 , Figure 1This is a schematic diagram of a display device according to an embodiment of the present invention. Figure 2 This is a schematic diagram illustrating 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. Operation method S100 is applicable to the display device 100. 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 all USB Type-C audio / video connection ports.

[0042] In this 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 based on the connection state of the input port PI, and generates a second state value DT2 based on 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, and the second state value DT2 corresponds to the connection state of the output port PO. In this embodiment, the first state value DT1 and the second state value DT2 can each be a connection state flag value (however, the present invention is not limited thereto).

[0043] In this embodiment, processor 120 is coupled to data port PD and detection circuit 110. Processor 120 generates a third state value DT3 based on the connection state of data port PD. In other words, the third state value DT3 corresponds to the connection state of data port PD. In step S120, processor 120 reads the first state value DT1 and the second state value DT2 from detection circuit 110. In step S120, processor 120 also determines the connection between display device 100 and audio / video source 300 based on the first state value DT1, the second state value DT2, and the third state value DT3, and provides a connection prompt signal SST. Connection prompt circuit 130 is coupled to processor 120. In step S130, connection prompt circuit 130 responds to the connection prompt signal SST to control display device 100 to display connection prompt screen IMGP. In this embodiment, the third state value DT3 can be a connection state marker value (however, the present invention is not limited thereto).

[0044] The audio / video source 300 can be a signal source device for providing audio / video signals (SV). The audio / video source 300 can be any type of electronic device capable of providing audio / video signals (SV).

[0045] It is worth mentioning that the display device 100 confirms the connection result between the display device 100 and the audio / video source 300 based on the first state value DT1, the second state value DT2, and the third state value DT3, and displays the connection prompt screen IMGP accordingly. In this way, in the event 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, input port PI and output port PO are USB Type-C video connection ports. Data port PD is a USB Type-C data transfer only connection port. Processor 120 determines whether the connection between display device 100 and audio / video source 300 is incorrect based on the first state value DT1, the second state value DT2, and the third state value DT3. When the connection between display device 100 and audio / video source 300 is determined to be incorrect, processor 120 provides a connection error prompt signal SST. Connection prompt circuit 130 responds to the connection error prompt signal SST and controls display device 100 to display the connection prompt screen IMGP. Therefore, the user can make the correct connection based on the connection prompt screen IMGP.

[0047] In this embodiment, the connection prompt screen IMGP is displayed, for example, as a pop-up prompt showing how to correctly connect the audio / video source 300 to the display device 100 (however, the invention is not limited to this). In this way, when a connection error occurs, the display device 100 can immediately display the connection prompt screen IMGP. The user can then view the connection prompt screen IMGP and correctly connect the audio / video source 300 to the display device 100.

[0048] On the other hand, when the connection between the display device 100 and the audio / video source 300 is determined to be correct, the processor 120 does not provide a 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 / video source 300 is determined to be correct, the processor 120 provides a connection prompt signal SST corresponding to the correct connection. Therefore, the display device 100 outputs a connection correct prompt screen.

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

[0050] 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 circuit (ASIC), programmable logic device (PLD), or other similar device or combination thereof, which can load and execute computer programs.

[0051] Please refer to Figure 3 , Figure 3 This 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. Controller 211 is coupled to the input port PI, the output port PO, and the processor 120. Controller 211 generates a first state value DT1 based on the connection state of the input port PI, and generates a second state value DT2 based on the connection state of the output port PO.

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

[0053] In this embodiment, when input port PI is not connected to an audio / video source, the first state value DT1 is equal to a first value. The first value is, for example, "0". When input port PI receives an audio / video source, the first state value DT1 is equal to a second value. The second value is, for example, "1". When output port PO does not receive an audio / video source, the second state value DT2 is equal to the first value. When output port PO receives an audio / video source, the second state value DT2 is equal to the second value. For example, 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] Controller 212 is coupled to input port PI, output port PO, controller 211, and processor 120. Controller 212 determines the audio / video signal (e.g., based on a first state value DT1 and a second state value DT2). Figure 1 The transmission direction of the audio / video signal (SV) shown.

[0055] In this embodiment, controller 211 may be a power delivery (PD) controller (however, the invention is not limited thereto). Controller 212 may be a thunderbolt controller.

[0056] The processor 120 generates a third state value DT3 based on the connection status of the data port PD. When the data port PD does not receive an audio / video source, the third state value DT3 is equal to the first value. When the data port PD receives an audio / video source, the third state value DT3 is equal to the second value. In this embodiment, the data port PD is a USB Type-C data-transfer only connection port. The data port PD has a VBUS pin. Therefore, the processor 120, for example, determines whether the data port PD has received an audio / video source by checking the power supply (VBUS) pin of the data port PD, and generates the third state value DT3 accordingly. As a further example, the processor 120 can determine whether the data port PD has received an audio / video source by checking the voltage level of the power supply (VBUS) pin of the data port PD.

[0057] In this embodiment, the controller 211 communicates with the processor 120, for example, 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] Processor 120 reads registers RG1 and RG2 to obtain a first state value DT1 and a second state value DT2. Processor 120 then 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 audio-visual source. Therefore, processor 120 determines that the display device 200 is not connected to the audio-visual source.

[0059] Please refer to Figure 4 , Figure 4 This is a connection diagram illustrated according to an embodiment of the present invention. Figure 4This illustrates a correct connection example. In this embodiment, the input port PI of the display device 200 is connected to the audio / video source 300. Therefore, the controller 211 changes the first state value DT1 stored in register RG1 to a second value (e.g., "1"), maintains the second state value DT2 stored in register RG2 at the first value (e.g., "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 equals the second value and the second state value DT2 equals the first value, the processor 120 knows that the input port PI is connected to the audio / video source 300 and determines that the connection between the display device 200 and the audio / video source 300 is correct. The display device 200 can correctly receive the audio / 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 This is a connection diagram illustrated according to an embodiment of the present invention. Figure 5 An example of an incorrect connection is shown. In this embodiment, the output port PO of the display device 200 is connected to the audio / video source 300. Therefore, the controller 211 maintains the first status value DT1 stored in register RG1 at a first value (e.g., "0"), changes the second status value DT2 stored in register RG2 to a second value (e.g., "1"), and notifies the processor 120. The processor 120 reads the first status value DT1 and the second status value DT2. When the first status value DT1 equals the first value and the second status value DT2 equals the second value, the processor 120 knows that the output port PO is connected to the audio / video source 300 and determines that the connection between the display device 200 and the audio / video source 300 is incorrect. The processor 120 provides a connection warning signal SST.

[0061] Please refer to Figure 6 , Figure 6 This is a connection diagram illustrated according to an embodiment of the present invention. Figure 6 This illustrates an example of an incorrect connection. In this embodiment, the display device 200 is connected to the audio / video source 300 only via the data port PD. Therefore, the controller 211 sets the first state value DT1 stored in register RG1 to a first value (e.g., "0") and the second state value DT2 stored in register RG2 to a first value. However, the processor 120 learns that the third state value DT3 is equal to the second value (e.g., "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 / video source 300 only via the data port PD. The processor 120 determines that the connection between the display device 200 and the audio / video source 300 is incorrect. The processor 120 provides a connection warning signal SST.

[0062] Please refer to Figure 7 , Figure 7 This is a connection diagram illustrated according to an embodiment of the present invention. Figure 7 This demonstrates an example of a correct connection. In this embodiment, the display device 200 is connected to the audio / video source 300 via input port PI and data port PD. Therefore, the controller 211 changes the first state value DT1 stored in register RG1 to a second value (e.g., "1"), maintains the second state value DT2 stored in register RG2 at the first value (e.g., "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 has changed to the second value. Therefore, when both the first state value DT1 and the third state value DT3 are equal to the second value, the processor 120 knows that the display device 200 is connected to the audio / video source 300 via input port PI and data port PD, and determines that the connection between the display device 200 and the audio / video 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 This is a state diagram drawn according to an embodiment of the present invention. Figure 8 The display device 100 is shown in its normal state ST1 and faulty connection state ST2. In this embodiment, the processor 120 can determine the state transition between normal state ST1 and faulty connection state ST2 based on a first state value DT1, a second state value DT2, and a third state value DT3. In normal state ST1, when the first state value DT1 equals a first value (i.e., "0") and the second state value DT2 equals a second value (i.e., "1"), the processor 120 determines that the display device 100 has entered faulty connection state ST2 from normal state ST1.

[0064] In 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 device 100 has entered the error connection state ST2 from normal state ST1.

[0065] Furthermore, in 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 audio / video source 300. The display device 100 not being connected to the audio / video source 300 also falls under normal state ST1. Therefore, the processor 120 determines that the display device 100 remains in normal state ST1.

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

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

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

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

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

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

[0072] On the other hand, in step S210, when the first state value DT1 is equal to the first value (such as "0"), the processor 120 determines that the input port PI is not connected to the audio-visual source 300, and in step S220 determines whether the output port PO is connected.

[0073] In step S220, the processor 120 can use the second status value DT2 to determine whether the input port PI is connected. In step S220, when the second status value DT2 equals a second value (e.g., "1"), this indicates that the input port PI is not connected to the audio / video source 300, but the output port PO is connected to the audio / video source 300. Therefore, in step S250, the processor 120 determines that the current connection status is an incorrect connection status 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 neither the input port PI nor the output port PO is connected to the audio-visual source 300, and in step S230 determines whether the data port PD is connected.

[0075] In step S230, the processor 120 can use the third status value DT3 to determine whether the data port PD is connected. In step S230, when the third status value DT3 is equal to the second value (e.g., "1"), this indicates that neither the input port PI nor the output port PO is connected to the audio / video source 300, but the data port PD is connected to the audio / video source 300. Therefore, in step S250, the processor 120 determines that the current connection status is an incorrect connection status 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 equals the first value (e.g., "0"), this indicates that the input port PI, output port PO, and data port PD are not connected to the audio / video source 300. Therefore, in step S240, the processor 120 determines that the current state is normal state ST1. Next, the operation method S200 returns to the operation of step S210.

[0077] Based on the above, the determination of normal state ST1 and faulty connection state ST2 can be summarized in 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 Figure 11 , Figure 11 This is a schematic diagram illustrating 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 / video source 300 but the output port PO is connected to the audio / video source 300, the processor 120 determines that the connection is incorrect. 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 based on the connection status signal SST. Therefore, the display device 100 displays the connection prompt screen IMGP to guide the user to make the correct connection.

[0083] In this embodiment, the connection prompt screen IMGP includes five prompt sections P1 to P6. Prompt section P1 displays a description of an incorrect connection where the audio / video source 300 is connected to the output port PO. For example, prompt section P1 displays text about an incorrect connection where the audio / video source 300 is connected to the output port PO.

[0084] The prompt section P2 displays an error message indicating that the current audio / video source 300 is connected to the output port PO. For example, prompt section P2 displays the error message graphically. Alternatively, prompt section P1 displays the error message textually.

[0085] The prompt section P3 displays the correct connection method between the display device 100 and the audio / video source 300. For example, prompt section P3 displays the correct connection method between input port PI and the audio / video source 300 graphically. Alternatively, prompt section P3 displays the correct connection method between input port PI and the audio / video source 300 in text format. Prompt section P4 displays an icon indicating the switching direction. The switching direction in prompt section P4 is from prompt section P2 to prompt section P3. Therefore, the user can intuitively understand that the incorrect connection in prompt section P2 must be corrected to the correct connection in prompt section P3. Prompt section P6 displays the data port PD.

[0086] The prompt section P5 displays the relative positions of the input port PI, output port PO, and data port PD. For example, the prompt section P5 displays information about the "front" of the display device 100. From 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 understand the relative positions of the input port PI, output port PO, and data port PD by referring 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 audio-visual source based on a first state value, a second state value, and a third state value, and displays a connection prompt screen accordingly. In this way, in the event 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 above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art should be able to make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the appended claims.

Claims

1. A display device, the display device comprising: One input port; One output port; One data port; A detection circuit coupled to the input port and the output port is configured to generate a first state value based on the connection state of the input port and a second state value based on the connection state of the output port. A processor coupled to the data port and the detection circuit is configured to generate a third state value based on the connection status of the data port, read the first state value and the second state value, and determine the connection between the display device and an audio-visual source based on the first state value, the second state value and the third state value and provide a connection prompt signal. as well as A connection prompt circuit, coupled to the processor, is configured to control the display device to display a connection prompt screen in response to the connection prompt signal; Wherein, when the input port, the output port, and the data port are not connected to the audio-visual source, the first state value, the second state value, and the third state value are equal to a first value; when the input port, the output port, and the data port are connected to the audio-visual source, the first state value, the second state value, and the third state value are equal to a second value. Specifically, when the first state value is equal to the first value, and the second state value or the third state value is equal to the second value, the processor determines that the connection between the display device and the audio-visual source is incorrect.

2. The display device as claimed in claim 1, wherein: The input port and the output port are both USB Type-C video connection ports, and This data port is the only data transfer type connection port in the USB Type-C specification.

3. The display device as claimed in claim 1, wherein the processor determines whether the data port has received the audio / video source through a power pin of the data port, and generates the third state value accordingly.

4. The display device as claimed in claim 1, wherein: The processor determines whether the connection between the display device and the audio / video source is incorrect based on the first state value, the second state value, and the third state value. When the connection between the display device and the audio / video source is determined to be incorrect, the processor provides a connection prompt signal.

5. The display device as claimed in claim 1, wherein when the first state value is equal to the second value, the processor determines that the connection between the display device and the audio / video source is correct.

6. The display device of claim 1, wherein when the first state value is equal to the second value and the third state value is equal to the second value, the processor determines that the connection between the display device and the audio / video source is correct.

7. The display device of claim 1, wherein the detection circuit comprises: A first controller, coupled to the input port, the output port and the processor, configured to generate a first state value based on the connection state of the input port and a second state value based on the connection state of the output port; as well as A second controller, coupled to the input port, the output port, the first controller, and the processor, is configured to determine the transmission direction of the audio-visual signal of the audio-visual source based on the first state value and the second state value.

8. The display device of claim 7, wherein the first controller comprises: A first register configured to store the first state value; as well as A second register configured to store the second state value.

9. An operation method for a display device, wherein the display device includes an input port, an output port, a data port, and a detection circuit, wherein the operation method includes: The detection circuit generates a first state value based on the connection state of the input port and a second state value based on the connection state of the output port. Based on the first state value, the second state value, and a third state value corresponding to the connection state of the data port, the connection between the display device and an audio / video source is determined and a connection prompt signal is provided. as well as The connection prompt signal is used to control the display device to show the connection prompt screen. Wherein, when the input port, the output port, and the data port are not connected to the audio-visual source, the first state value, the second state value, and the third state value are equal to a first value; when the input port, the output port, and the data port are connected to the audio-visual source, the first state value, the second state value, and the third state value are equal to a second value. The step of determining the connection between the display device and the audio / video source based on the first state value, the second state value, and the third state value corresponding to the connection status of the data port, and providing the connection prompt signal includes: When the first state value is equal to the first value and the second state value or 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.

10. The operating method of claim 9, wherein the data port is a USB Type-C type-only data transfer connection port, and the operating method further includes: The third status value is generated based on whether the data port has received the audio / video source by using a power pin of the data port.

11. The operation method of claim 9, wherein the step of determining the connection between the display device and the audio / video source based on the first state value, the second state value, and the third state value corresponding to the connection state of the data port and providing a connection prompt signal includes: The connection between the display device and the audio / video source is determined based on the first state value, the second state value, and the third state value. as well as When the connection between the display device and the audio / video source is determined to be incorrect, a connection prompt signal is provided.

12. The operation method of claim 9, wherein the step of determining the connection between the display device and the audio / video source and providing a connection prompt signal based on the first state value, the second state value, and the third state value corresponding to the connection state of the data port includes: When the first state value equals the second value, it is determined that the connection between the display device and the audio-visual source is correct.

13. The operation method of claim 9, wherein the step of determining the connection between the display device and the audio / video source based on the first state value, the second state value, and the third state value corresponding to the connection state of the data port and providing a connection prompt signal includes: 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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