TWI751660B - Image switching control method and image processing device - Google Patents

Abstract

An image switching control method is executed by an image processing device and includes: (A) detecting whether a first preset pin of a first signal input port is at a high logic level; (B) judging when (A) When the result is yes, set a first flag related to the first signal input port to a high logic level; (C) generate and output a first input signal according to a first input signal received by the first signal input port a first output signal; (D) detecting whether the first default pin is at a low logic level; (E) when the judgment result of (D) is no, detecting a second signal input port of a second signal Whether the default pin is at a high logic level; (F) when the judgment result of (E) is yes, detect whether a second flag related to the second signal input port is at a high logic level; and ( G) When the judgment result of (F) is YES, execute (C) repeatedly.

Description

Image switching control method and image processing device

The present invention relates to a method and an apparatus, and more particularly, to an image switching control method and an image processing apparatus.

Most of the existing display systems support a variety of video interface formats (such as High-Definition Multimedia Interface (HDMI) format, or display port (Displayport) interface format, etc.) of video signals, and set up a plurality of corresponding to A signal input port of an equivalent image interface format, and a plurality of Universal Serial Bus (USB) input ports corresponding to the equivalent signal input ports. The signal input ports and the USB input ports are used to connect to a plurality of audio-visual devices, such as desktop computers, notebook computers, multimedia set-top boxes and other audio-visual devices.

Specifically, when using, the user first inserts a connection interface (ie a plug) of a signal cable into a signal connection port (ie a slot) of an audio-visual device for outputting an image signal, and the signal cable The other connection interface of the display system is inserted into a corresponding signal input port of the display system to transmit the image signal to the display system. At the same time, the user inserts a connection interface of a USB connection cable into a corresponding USB connection port in the audio-visual device, and inserts the other connection interface of the USB connection cable into a corresponding USB input port in the display system, so as to connect the A control signal for controlling the video signal is transmitted to the USB input port of the display system through the USB connection port of the video and audio device. Then, the user uses a remote control device to switch the signal source of the display system to the corresponding signal input port and the USB input port from the HMI of the display system, so that an image processor in the display system can A corresponding image processing method is used to process the image signal according to the image interface format of a corresponding signal input port, so as to perform image display.

However, in such an image display and control method, the user must use the remote control device to switch the signal source of the display system to different signal input ports and different USB input ports, which causes inconvenience to the user.

Therefore, an object of the present invention is to provide an image switching control method that can overcome the shortcomings of the prior art.

Therefore, the image switching control method of the present invention is executed by an image processing device to process a first input signal received through a first signal input port and a second input signal received through a second signal input port At least one of the first and second input signals is each related to one of an image signal and a control signal, and the image switching control method includes:

(A) detecting whether a first default pin of the first signal input port is at a high logic level;

(B) when the determination result in (A) is yes, set a first flag related to the first signal input port to the high logic level;

(C) generating and outputting a first output signal according to the first input signal received by the first signal input port to perform one of image display and image adjustment;

(D) detecting whether the first default pin of the first signal input port is at a low logic level;

(E) when the determination result in (D) is no, detecting whether a second default pin of the second signal input port is at the high logic level;

(F) when the determination result in (E) is yes, detecting whether a second flag associated with the second signal input port is at the high logic level; and

(G) When the judgment result in (F) is YES, (C) is repeatedly executed.

Another object of the present invention is to provide an image processing device that can overcome the shortcomings of the prior art.

The image processing device includes an image processor and a display.

The image processor is electrically connected to first and second signal input ports for receiving first to third image signals respectively, and a default signal input port, and the image processor detects a first signal input port of the first signal input port. Whether a preset pin is at a high logic level, and when the determination result is yes, the first image signal is processed according to a first image processing method to generate a first output signal, and when the determination result is no When , detect whether a second default pin of the second signal input port is at the high logic level, when the second default pin is at the high logic level, the image processor according to a second The image processing method is used to process the second image signal to generate a second output signal. When the first and second preset pins are respectively at a low logic level, the image processor detects the preset signal Whether a third preset pin of the input port is at a high logic level, and when the determination result is yes, the third image signal is processed according to a preset image processing method to generate a third output signal.

The display is electrically connected to the image processor to receive one of the first to third output signals and display an image according to the one of the first to third output signals.

The effect of the present invention is: using the image processing device to execute the image switching control method of the present invention can automatically generate and output the first output signal according to the first input signal received by the first signal input port for image display or The image adjustment can automatically switch the signal input port, thereby providing the user with a more convenient and intuitive signal source switching method to achieve the purpose of being convenient for the user to use.

Referring to FIG. 1 to FIG. 3 , an embodiment of the image switching control method of the present invention is executed by an image processing device 10 . The image processing device 10 is disposed in a display system (not shown), and is electrically connected to a plurality of signal input ports of the display system. In this embodiment, the image processing device 10 is electrically connected to five signal input ports 101 , 102 , 103 , 104 , and 105 as an example, but it is not limited thereto. The signal input ports 101 , 102 and 103 are respectively used for inserting a connection interface of a signal connection cable (not shown in the figure) electrically connected to an audio-visual device (not shown in the figure), and are connected to the connection interface of the signal connection cable. When the interface is inserted, an image signal from the audio-visual device is received. The signal input ports 104 and 105 are respectively used for inserting a connection interface of a USB connection cable (not shown) electrically connected to the audio-visual device, and when the connection interface of the USB connection cable is inserted, receive signals from the USB connection interface. A control signal of the audio-visual device for controlling the corresponding video signal. The signal input port 101 is a high definition multimedia interface (High Definition Multimedia Interface, HDMI) port, the signal input port 102 is a universal serial bus (USB) Type-C port, the signal input port The port 103 is composed of a display port (DisplayPort, DP) 1031 and a DP to HDMI transfer port 1032 . The DP to HDMI port 1032 is used for converting the video signal received by the DisplayPort (DP) 1031 from a Low-Voltage Differential Signaling (LVDS) to a Transition Minimized signal (Transition Minimized). Differential Signaling, TMDS) output. The signal input ports 104 and 105 correspond to the signal input ports 101 and 103 respectively, and the signal input ports 104 and 105 are respectively a USB connection port, but not limited thereto.

The image processing device 10 includes an image processor 2 , a display 3 , a USB hub 4 , a detector 5 , a switch unit 6 , and an image adjustment unit 7 .

The image processor 2 is electrically connected to the first and second signal input ports respectively for receiving the first to third image signals S1 to S3 (ie, the first to third input signals), and a predetermined signal input port, The first signal input port also receives a first control signal C1 (ie, another first input signal). Hereinafter, the first and second signal input ports, and the default signal input port are referred to as the signal input port 102 , the DP to HDMI transfer port 1032 , and the signal input port 101 , respectively. In this embodiment, the image processor 2 is an image scaling control (Scaler) chip, the first and second image signals S1 and S2 are each an external image signal, and the third image signal S3 is the display system A preset video signal in the , but not limited to this.

The signal input port 102, the DP to HDMI transfer port 1032, and the signal input port 101 correspond to the first and second video interface formats, respectively, and a default video interface format. The image processor 2 detects whether a first default pin of the signal input port 102 is at a high logic level (the high logic level is 1), and when the determination result is yes (ie, the signal input The port 102 receives the first image signal S1), processes the first image signal S1 according to a first image processing method corresponding to the first image interface format, to generate a first output So1, and the determination result is no , detect whether a second default pin of the DP to HDMI port 1032 is at the high logic level, when the second default pin is at the high logic level (ie, the DP to HDMI The switch port 1032 receives the second image signal S2), and the image processor 2 processes the second image signal S2 according to a second image processing method corresponding to the second image interface format to generate a second output signal So2. When the first default pin of the signal input port 102 and the second default pin of the DP to HDMI port 1032 are each a low logic level (the low logic level is 0) (ie , the signal input port 102 and the DP-to-HDMI transfer port 1032 do not receive the first and second video signals S1 and S2 respectively), the video processor 2 detects a third preset of the signal input port 101 Set whether the pin is a high logic level, and when the judgment result is yes (that is, the signal input port 101 receives the third image signal S3), according to a pair of preset image processing corresponding to the preset image interface format The third image signal S3 is processed in a manner to generate a third output signal So3.

In this embodiment, the default video interface format is an HDMI format, the first video interface format is a USB Type-C interface format, and the second video interface format is a DP interface format. In addition, in practice, a detection circuit can be set in the image processor 2 to detect whether the first to third pins are at the high logic level or the low logic level. The detection circuit is as follows: It is well known to those skilled in the art, and for the sake of brevity, detailed descriptions are omitted here.

The display 3 is electrically connected to the image processor 2 to receive one of the first to third output signals So1 to So3, and to display an image according to the one of the first to third output signals So1 to So3.

The detector 5 is electrically connected to the signal input port 102 and the third and fourth signal input ports for receiving the second and third control signals C2 and C3 (ie, another second and third input signals), respectively. . The third and fourth signal input ports are hereinafter referred to as the signal input ports 105 and 104, respectively. The signal input port 104 is a default signal input port. The detector 5 detects each of the first default pin of the signal input port 102 , a third default pin of the signal input port 104 and a fourth default pin of the signal input port 105 A logic level to generate a switching control signal Sc correspondingly.

The switch unit 6 is electrically connected to the USB hub 4, the detector 5, and the signal input ports 102, 104, and 105, receives the switch control signal Sc from the detector 5, and receives the switch control signal Sc Control to establish a connection between one of the signal input ports 102, 104, 105 and the USB hub 4, so that the USB hub 4 receives the corresponding signal from the one of the signal input ports 102, 104, 105 A corresponding one of the first to third control signals C1 ˜ C3 generates and outputs a corresponding one of the fourth to sixth output signals So4 ˜ So6 accordingly. In this embodiment, the first and second control signals C1 and C2 are each an external control signal, and the third control signal C3 is a preset control signal in the display system, but not limited thereto.

The image adjustment unit 7 is electrically connected to the USB hub 4 and the display 3 , receives the corresponding one of the fourth to sixth output signals So4 to So6 from the USB hub 4 , and according to the fourth to sixth output signals So4 to So6 The corresponding one of the output signals So4 to So6 adjusts the image displayed on the display 3 .

Specifically, the image processing device 10 executes an image switching control method including the following steps 80-96, so that the image processing device 10 can intelligently and automatically switch the image signal source of the display 3 to different signal input ports.

In step 80, the image processor 2 detects whether the first default pin of the signal input port 102 (ie, a bus power V _BUS pin of the signal input port 102) is at the high logic level. If the determination is yes, the signal input port 102 receives the first image signal S1 , and the process goes to step 81 ; if the determination is no, the process goes to step 87 .

In step 81, the image processor 2 sets a first flag associated with the signal input port 102 to the high logic level.

In step 82, the image processor 2 processes the first image signal S1 according to the first image processing method corresponding to the first image interface format (that is, the image processor 2 automatically provides the display 3 with The image signal source is switched to the signal input port 102) to generate and output the first output signal So1 to the display 3 for image display.

In step 83, the image processor 2 detects whether the first default pin of the signal input port 102 is at the low logic level. If the judgment is yes, the flow goes to step 84 ; if the judgment is no, the flow goes to step 85 .

In step 84 , the image processor 2 sets the first flag to the low logic level, and the process returns to step 80 .

In step 85, the image processor 2 detects the second default pin of the DP-to-HDMI port 1032 (ie, an I ² C serial data pin of the DP-to-HDMI port 1032 ) Whether it is the high logic level. If the determination is yes, the DP to HDMI port 1032 receives the second video signal S2 , and the process goes to step 86 ; if the determination is no, the process returns to step 82 .

It should be noted that the function of the above step 83 is to reconfirm that the signal input port 102 still receives the first video signal S1. In this way, when the process enters step 85 and the determination is no and the process returns to step 82 , which can avoid the situation that the signal input port 102 does not receive the first image signal S1 due to external factors, so that the image processor 2 cannot output the first output signal So1 to the display 3 for image display.

In step 86, the image processor 2 detects whether a second flag associated with the DP-to-HDMI port 1032 is at the high logic level. If the determination is yes, the flow returns to step 82 ; if the determination is no, the flow proceeds to step 88 .

It should be noted that, in this embodiment, the image processor 2 determines that the signal input port 102 and the DP-to-HDMI transfer port 1032 receive the signals according to the logic levels of the first and second flags, respectively. The sequence of the first and second image signals S1 and S2. For example, when the process proceeds to step 86 and the determination is yes, it means that the second flag is set to the high logic level earlier than the first flag, that is, the DP to HDMI port is After 1032 first receives the second video signal S2, the signal input port 102 receives the first video signal S1. Therefore, when the process proceeds to step 86 and the determination is yes and the process returns to step 82, the image processor 2 still generates the first output signal So1 according to the first image signal S1 received relatively slowly for image display In this way, when two image signals are input, the image processor 2 will automatically process and output the slowest received image signal for the display 3 to perform image display. In other embodiments, when more than two image signals are input, the image processor 2 can also use a determination method to obtain the last input image signal according to the aforementioned determination method, and process and output the image signal accordingly. The display 3 displays images.

In step 87, the image processor 2 detects whether the second default pin of the DP to HDMI port 1032 is at the high logic level. If the determination is yes, the flow goes to step 88 ; if the determination is no, the flow goes to step 94 .

In step 88, the image processor 2 sets the second flag to the high logic level.

In step 89, the image processor 2 processes the second image signal S2 according to the second image processing method corresponding to the second image interface format (that is, the image processor 2 automatically provides the display 3 with The image signal source is switched to the DP to HDMI port 1032) to generate and output the second output signal So2 to the display 3 for image display.

In step 90, the image processor 2 detects whether the second default pin of the DP to HDMI port 1032 is at the low logic level. If the determination is yes, the flow goes to step 91 ; if the determination is no, the flow goes to step 92 .

In step 91 , the image processor 2 sets the second flag to the low logic level, and the flow returns to step 80 .

In step 92, the image processor 2 detects whether the first default pin of the signal input port 102 is at the high logic level. If the determination is yes, the flow goes to step 93 ; if the determination is no, the flow returns to step 89 .

In step 93, the image processor 2 detects whether the first flag is at the high logic level. If the determination is yes, the flow returns to step 89 ; if the determination is no, the flow returns to step 81 .

In step 94, the image processor 2 detects whether the third default pin of the signal input port 101 (ie, a pin of the signal input port 101 providing a voltage of +5V as a voltage source) is the high logic level. If the determination is yes, the signal input port 101 receives the third video signal S3, and the process goes to step 95; if the determination is no, the process ends.

In step 95, the image processor 2 processes the third image signal S3 according to the preset image processing method corresponding to the preset image interface format (that is, the image processor 2 automatically provides the display 3 with the image signal S3). The image signal source is switched to the signal input port 101) to generate and output the third output signal So3 to the display 3 for image display.

In step 96, the image processor 2 detects whether one of the first and second default pins is at the high logic level. If the determination is yes, the flow returns to step 80 ; if the determination is no, the flow returns to step 95 .

Further referring to FIGS. 1 , 4 and 5 , in addition, the image processing device 10 executes another image switching control method including the following steps 80 ′ to 96 ′, so that the image processing device 10 can intelligently and automatically adjust the display 3 The signal control source of the displayed image signal is switched to a different USB input port. It should be noted that the other image switching control method shown in FIGS. 4 and 5 is similar to the image switching control method shown in FIGS. 2 and 3 . The difference between the two is that in the other image switching control method, the detector 5 Instead of the video processor 2 for detection, the DP-to-HDMI port 1032 and the signal input port 101 are replaced by the signal input ports 105 and 104, respectively, the first to third video signals S1-S3 They are respectively replaced by the first to third control signals C1 to C3 (ie, the first to third input signals). The first to third output signals So1 to So3 are respectively replaced by the fourth to sixth output signals So4 to So6.

In step 80', the detector 5 detects whether the first default pin of the signal input port 102 is at the high logic level. If the determination is yes, the signal input port 102 receives the first control signal C1, and the process goes to step 81'; if the determination is no, the process goes to step 87'.

In step 81', the detector 5 sets the first flag related to the signal input port 102 to the high logic level.

In step 82', the USB hub 4 generates and outputs the fourth output signal So4 to the image adjustment unit 7 according to the first control signal C1 for image adjustment.

Specifically, when the detector 5 detects that the first preset pin is at the high logic level and correspondingly generates the switching control signal Sc to the switch unit 6, the switch unit 6 receives the switch control signal Sc control, and establish the connection between the signal input port 102 and the USB hub 4 (that is, the control signal source supplied to the USB hub 4 is switched to the signal input port 102 in response to the switch unit 6 being controlled), so that the The USB hub 4 receives the first control signal C1 from the signal input port 102, and accordingly generates and outputs the fourth output signal So4 to the image adjustment unit 7, and then the image adjustment unit 7 according to the fourth output signal The So4 performs image adjustment on the display 3 .

In step 83', the detector 5 detects whether the first default pin of the signal input port 102 is at the low logic level. If it is judged as yes, the flow goes to step 84'; if it is judged as no, the flow goes to step 85'.

In step 84', the detector 5 sets the first flag to the low logic level, and the flow returns to step 80'.

In step 85', the detector 5 detects whether the second default pin of the signal input port 105 (ie, a pin of the signal input port 105 providing a voltage source) is at the high logic level . If the determination is yes, the signal input port 105 receives the second control signal C2, and the process goes to step 86'; if the determination is no, the process returns to step 82'.

It should be noted that the function of the above-mentioned step 83' is to confirm again that the signal input port 102 still receives the first control signal C1. In this way, when the process enters the step 85' and the determination is no, the process returns to the step 82', it can avoid the situation that the signal input port 102 does not receive the first control signal C1 due to external factors, so that the USB hub 4 cannot output the fourth output signal So4 to the image adjustment unit 7 for image adjustment. occur.

In step 86', the detector 5 detects whether a second flag associated with the signal input port 105 is at the high logic level. If the judgment is yes, the flow returns to step 82'; if the judgment is no, the flow proceeds to step 88'.

Similarly, in this embodiment, the detector 5 determines that the signal input ports 102 and 105 respectively receive the first and second control signals C1 according to the logic levels of the first and second flags , the sequence of C2, in this way, when two control signals are input, the switching control signal Sc generated by the detector 5 will cause the switch unit 6 to automatically perform the slowest received control signal. output effect. In other embodiments, when more than two control signals are input, the detector 5 can also use a judgment method to obtain the last input control signal according to the aforementioned judgment method, and control the switch unit 6 to switch the last input control signal. Input control signal output.

In step 87', the detector 5 detects whether the second default pin of the signal input port 105 is at the high logic level. If the judgment is yes, the flow goes to step 88'; if the judgment is no, the flow goes to step 94'.

In step 88', the detector 5 sets the second flag to the high logic level.

In step 89 ′, the USB hub 4 generates and switches the control signal source supplied to the USB hub 4 to the signal input port 105 according to the second control signal C2 (ie, corresponding to the switch unit 6 being controlled to switch the control signal source to the signal input port 105 ) The fifth output signal So5 is output to the image adjustment unit 7 for image adjustment. It should be noted that, the detailed operation of step 89' is similar to the detailed description of step 82', which is not repeated here.

In step 90', the detector 5 detects whether the second default pin of the signal input port 105 is at the low logic level. If it is judged to be yes, the flow goes to step 91'; if it is judged to be no, the flow goes to step 92.

In step 91', the detector 5 sets the second flag to the low logic level, and the flow returns to step 80'.

In step 92', the detector 5 detects whether the first default pin of the signal input port 102 is at the high logic level. If the judgment is yes, the flow goes to step 93'; if the judgment is no, the flow returns to step 89'.

In step 93', the detector 5 detects whether the first flag is the high logic level. If the judgment is yes, the flow returns to step 89'; if the judgment is no, the flow returns to step 81'.

In step 94', the detector 5 detects whether the third default pin of the signal input port 104 (ie, a pin of the signal input port 104 providing a voltage source) is at the high logic level . If the determination is yes, the signal input port 104 receives the third control signal C3, and the process goes to step 95'; if the determination is no, the process ends.

In step 95 ′, the USB hub 4 generates and switches the control signal source supplied to the USB hub 4 to the signal input port 104 according to the third control signal C3 (that is, corresponding to the control of the switch unit 6 ) to the signal input port 104 . The sixth output signal So6 is output to the image adjustment unit 7 for image adjustment. It should be noted that the detailed operation of step 95' is similar to the detailed description of step 82' above, and will not be repeated here.

In step 96', the detector 5 detects whether one of the first and second default pins is at the high logic level. If the determination is yes, the flow returns to step 80'; if the determination is no, the flow returns to step 95'.

To sum up, using the image processing device 10 to execute the image switching control method of the present invention can achieve that when there are no external image signals S1, S2 and control signals C1, C2, the image processing device 10 can perform the predetermined image signal S3 according to the image processing device 10. It performs image display and control with the control signal C3. When there are external image signals S1, S2 and control signals C1, C2, the image processing device 10 will automatically according to the image signals S1, S2 and the control signals C1, C2 the slowest received image signal and the image signal The control signal is used for image display and control. That is to say, using the image processing device 10 to execute the image switching control method of the present invention can automatically switch the image signal source of the display 3 to different signal input ports 101, 102, 1032, and the control signal to be used to control the image signal The source is automatically switched to different signal input ports 102, 104, 105, thereby providing users with a more convenient and intelligent switching method of the image signal source and control signal source, which is convenient for the user to use, and improves the conventional technology. The user uses the remote control device to switch the signal source of the display to different signal input ports and the absence of different USB input ports.

However, the above are only examples of the present invention, and should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included in the scope of the present invention. within the scope of the invention patent.

10: Image processing device 101~105: Signal input port 1031: Display port 1032: DP to HDMI port 2: Image processor 3: Display 4: Universal Serial Bus Hub 5: Detector 6: Switch unit 7: Image adjustment unit S1~S3: The first to third video signals C1~C3: The first to third control signals So1~So6: The first to sixth output signals Sc: switch control signal 80~96: Steps 80'~96': steps

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a block diagram illustrating an embodiment of an image processing apparatus of the present invention; FIG. 2 and FIG. 3 are a flowchart illustrating that the image processing apparatus executes a first embodiment of the image switching control method of the present invention; and FIG. 4 and FIG. 5 are a flowchart illustrating a second embodiment of the image switching control method executed by the image processing apparatus.

80~84: Steps

87~91: Steps

94~96: Steps

Claims (11)

An image switching control method is executed by an image processing device to process at least one of a first input signal received through a first signal input port and a second input signal received by a second signal input port One, the first and second input signals are each related to one of an image signal and a control signal, and the image switching control method includes: (A) detecting a first signal input port of the first signal Whether the electrical signal on the default pin is a high logic level; (B) when the determination result in (A) is yes, set a first flag related to the first signal input port to the high level logic level; (C) generate and output a first output signal according to the first input signal received by the first signal input port to perform one of image display and image adjustment; (D) detect the Whether the electrical signal on the first preset pin of the first signal input port is at a low logic level; (E) when the determination result in (D) is no, detect a signal on the second signal input port Whether the electrical signal on the second preset pin is at the high logic level; (F) when the determination result in (E) is yes, detect whether a second flag related to the second signal input port is is the high logic level; and (G) when the judgment result in (F) is yes, repeat the execution of (C). The video switching control method of claim 1, wherein when the determination result in (D) is yes, the first flag is set to the low logic level, and (A) is repeatedly performed, and When the judgment result in (E) is NO, the execution of (C) is repeated. The image switching control method according to claim 1, further comprising: (H) when the determination result in (A) is no, detecting an electrical signal on the second default pin of the second signal input port Whether it is the high logic level; (I) when the judgment result in (H) is yes, set the second flag to the high logic level; and (J) receive according to the second signal input port The second input signal of the device generates and outputs a second output signal for one of image display and image adjustment. The video switching control method according to claim 3, wherein when the determination result in (F) is no, the second flag is set to the high logic level, and (J) is executed. The image switching control method according to claim 3, after performing (J), the image switching control method further comprises: (K) detecting an electrical signal on the second preset pin of the second signal input port Whether it is the low logic level; (L) when the judgment result in (K) is no, detect whether the electrical signal on the first default pin of the first signal input port is the high logic level ; (M) when the judgment result in (L) is yes, detect whether the first flag related to the first signal input port is the high logic level; and (N) when the (M) in When the judgment result is YES, the execution of (J) is repeated. The video switching control method according to claim 5, wherein, When the judgment result in (K) is yes, set the second flag to the low logic level, and repeat (A), and when the judgment result in (M) is no, set the first flag The flag is set to this high logic level, and execution (C) is repeated. According to the image switching control method of claim 3, the image processing device further processes a third input signal received through a default signal input port, and the third input signal is related to the image signal and the control signal. In one aspect, the image switching control method further includes: (O) when the determination result in (H) is no, detecting whether the electrical signal on a third preset pin of the preset signal input port is the high logic level; (P) when the judgment result in (O) is yes, generate and output a third output signal according to the third input signal received by the third signal input port for image display and one of image adjustment; (Q) detecting whether the electrical signal on one of the first and second default pins is the high logic level; (R) when the judgment result in (Q) When yes, repeat (A); and (S) when the judgment result in (Q) is NO, repeat (P). The image switching control method as claimed in claim 7, wherein the first to third input signals are respectively related to the image signal, the default signal input port corresponds to a default image interface format, the first and third input signals are related to the image signal, respectively. The two signal input ports correspond to the first and second image interface formats, respectively. In (C), the first input signal is processed according to a first image processing method corresponding to the first image interface format to generate and output the first input signal. The first output signal is sent to a display for image display. In (J), the second input signal is processed according to a second image processing method corresponding to the second image interface format to generate and output the second output signal to The display performs image display, and in (P), the third input signal is processed according to a preset image processing method corresponding to the preset image interface format, so as to generate and output the third output signal to the display for image processing show. The video switching control method according to claim 8, wherein the default video interface format is a high-definition multimedia interface format, and the first video interface format is a Universal Serial Bus (USB) Type- C interface format, the second image interface format is a display port (DisplayPort) interface format. An image processing device, comprising: an image processor electrically connected to first and second signal input ports respectively for receiving first to third image signals, and a default signal input port, the image processor detects the Whether the electrical signal on a first preset pin of the first signal input port is a high logic level, and when the determination result is yes, process the first image signal according to a first image processing method to generate a first output signal, and when the determination result is no, detect whether the electrical signal on a second default pin of the second signal input port is the high logic level, when the second default pin When the electrical signal above is at the high logic level, the image processor processes the second image signal according to a second image processing method to generate a second output signal. When the first and second preset connections are The electrical signals on the pins are each a low logic level When the image processor detects whether the electrical signal on a third preset pin of the preset signal input port is a high logic level, and when the determination result is yes, according to a preset image processing method processing the third image signal to generate a third output signal; and a display electrically connected to the image processor to receive one of the first to third output signals, and according to the first to third output signals The one in the output signal displays the image. The image processing device of claim 10, wherein the first signal input port further receives a first control signal, the image processing device further comprises: a universal serial bus hub; a detector electrically connected to the first control signal a signal input port, and third and fourth signal input ports for receiving second and third control signals respectively, the detector detects the first default pin, the first default pin of the first signal input port, the first A third preset pin of the three signal input ports and a fourth preset pin of the fourth signal input port have a respective logic level of the electrical signal to generate a switching control signal correspondingly. and the fourth signal input port respectively correspond to the second signal input port and the default signal input port; a switch unit is electrically connected to the universal serial bus hub, the detector, the first signal input port, and the The third and fourth signal input ports receive the switching control signal from the detector, and are controlled by the switching control signal to establish one of the first signal input port and the third and fourth signal input ports the connection between the one and the universal serial bus hub so that the universal serial bus hub receives correspondence from the first signal input port, the third and fourth signal input ports corresponding to one of the first to third control signals, and to generate and output a corresponding one of the fourth to sixth output signals accordingly; and an image adjustment unit electrically connected to the universal serial bus hub and the display, receiving the corresponding one of the fourth to sixth output signals from the universal serial bus hub, and adjusting the displayed value of the display according to the corresponding one of the fourth to sixth output signals image.

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