Display system, display panel control chip, and related signal transmission switching method

Abstract

A display panel control chip including a processor and a signal processing circuit. The processor controls the display panel to display a first image and a second image corresponding to a first video signal and a second video signal respectively. The first image and the second image are adjacent to a boundary, and the boundary extends perpendicular to the first direction at a first coordinate in the first direction. The signal processing circuit stores the first coordinate, determines whether the first cursor is located in the first image or the second image based on the first cursor control signal and the first coordinate, and transmits the first cursor control signal to a first signal source of the first video signal or a second signal source of the second video signal according to the determination result. When the area ratio between the first image and the second image changes, the processor notifies the signal processing circuit to update the stored first coordinate.

Description

Technical Field

[0001] This application relates to a display system, a display panel control chip, and a related driving method, and particularly to a display system and a display panel control chip capable of automatically switching signal transmission paths, and a related signal transmission switching method. Background Art

[0002] With the popularity of large-sized home displays, users can play multimedia content from different sources on the same display, thereby enhancing the user experience and expanding the usage mode of the display. For example, a user can display a computer game running on a desktop computer in the left half of the display and simultaneously display a web browser running on a notebook computer in the right half of the display to query game strategies. However, in order to operate different computers, the user's desktop is often occupied by multiple sets of keyboards and mice. Such a situation not only reduces the space utilization efficiency, but also the operation method of switching between multiple sets of keyboards and mice will reduce the user's work efficiency. Summary of the Invention

[0003] This application provides a display panel control chip, which includes a processor and a signal processing circuit. The processor is used to control the display panel to display a first image and a second image corresponding to a first video signal and a second video signal respectively. The first image and the second image are adjacent to a boundary, and a first coordinate of the boundary in a first direction is perpendicular to the extension of the first direction. The signal processing circuit is used to store the first coordinate, and is used to determine whether the first cursor is located in the first image or the second image based on at least a first cursor control signal and the first coordinate to generate a first determination result. The signal processing circuit is further used to transmit the first cursor control signal to one of a first signal source of the first video signal and a second signal source of the second video signal according to the first determination result. When the area ratio between the first image and the second image changes, the processor notifies the signal processing circuit to update the first coordinate.

[0004] This application provides a signal transmission switching method, which is applicable to a display panel control chip. The foregoing method includes the following processes: controlling a display panel to display a first image and a second image corresponding to a first video signal and a second video signal respectively, where the first image and the second image are adjacent to a boundary, and a first coordinate of the boundary in a first direction is perpendicular to the extension of the first direction; determining whether the first cursor is located in the first image or the second image based on at least a first cursor control signal and the first coordinate to generate a first determination result; transmitting the first cursor control signal to one of a first signal source of the first video signal and a second signal source of the second video signal according to the first determination result; and when the area ratio between the first image and the second image changes, updating the first coordinate stored in the display panel control chip.

[0005] The present application provides a display system, which includes a display panel and a display panel control chip. The display panel control chip is coupled to the display panel and includes a processor and a signal processing circuit. The processor is used to control the display panel to display a first image and a second image corresponding to a first video signal and a second video signal respectively. The first image and the second image are adjacent to a boundary, and a first coordinate of the boundary in a first direction is perpendicular to the first direction and extends. The signal processing circuit stores the first coordinate and is used to determine whether the first cursor is located in the first image or the second image based on at least a first cursor control signal and the first coordinate to generate a determination result, and is used to transmit the first cursor control signal to one of a first signal source of the first video signal and a second signal source of the second video signal according to the determination result. When the area ratio between the first image and the second image changes, the processor notifies the signal processing circuit to update the first coordinate. Description of the Drawings

[0006] Figure 1 FIG. is a simplified functional block diagram of a display system according to an embodiment of the present application.

[0007] Figure 2A FIG. is a schematic diagram of a cursor moving in the screen of a display panel.

[0008] Figure 2B For explaining the operation of the processor to change the area ratio of an image.

[0009] Figure 3A FIG. is a schematic diagram of a cursor moving in the screen of a display panel.

[0010] Figure 3B For explaining the operation of the processor to change the area ratio of an image.

[0011] Figure 4 FIG. is a simplified functional block diagram of a display system according to an embodiment of the present application.

[0012] Figure 5 FIG. is a schematic diagram of a cursor moving in the screen of a display panel. Detailed Description of the Embodiments

[0013] Embodiments of the present application will be described below with reference to the relevant drawings. In the drawings, the same reference numerals denote the same or similar elements or method flows.

[0014] Figure 1 FIG. is a simplified functional block diagram of a display system 100 according to an embodiment of the present application. The display system 100 includes a display panel control chip 110, a display panel 120, a Universal Serial Bus (USB) interface circuit 130, and a USB hub 140. The display panel control chip 110 is coupled to the USB interface circuit 130 through the USB hub 140, and the display panel control chip 110 is also coupled to the display panel 120.

[0015] The display panel control chip 110 includes a processor 112 and a signal processing circuit 114 that are coupled to each other. When the display system 100 receives multiple video signals VSa and VSb from multiple computing devices 101a and 101b, the processor 112 generates a video output VO based on the content of the video signals VSa and VSb. The processor 114 controls the display panel 120 to simultaneously display multiple images corresponding to the content of the video signals VSa and VSb respectively through the video output VO. For example, as shown later Figure 2A The processor 114 can control the display panel 120 to simultaneously display side-by-side (Picture by Picture) images 210 and 220 corresponding to the video signals VSa and VSb respectively. Also for example, as shown later Figure 3A The processor 114 can control the display panel 120 to simultaneously display picture-in-picture (Picture in Picture) images 310 and 320 corresponding to the video signals VSa and VSb respectively.

[0016] In some embodiments, the display panel control chip 110 can be implemented by a scaler IC. Therefore, in the process of the processor 112 generating the video output VO based on the content of the video signals VSa and VSb, operations including resolution adjustment of the content of the video signals VSa and VSb are involved.

[0017] In practice, the processor 112 can encapsulate the packets of a certain frame in the video signal VSa and the packets of a certain frame in the video signal VSb together as the packets of a certain frame of the video output VO, and then transmit the packets of the video output VO to the display panel 120. In this way, the display panel 120 can simultaneously display multiple images corresponding to the video signals VSa and VSb in one frame of the screen. In some other embodiments, the computing devices 101a and 101b can be implemented by a desktop computer, a notebook computer, or a game console.

[0018] Please refer to again Figure 1When the display system 100 is coupled to the cursor control device 103a, the signal processing circuit 114 receives the cursor control signal CSa of the cursor control device 103a through the USB interface circuit 130 and the USB hub 140. In some embodiments, the cursor control device 103a can be implemented by a mouse, a trackball, or a joystick. The packet of the cursor control signal CSa may include key click information and cursor movement amount information. In some embodiments, the signal processing circuit 114 can calculate the current coordinates of the cursor CRa according to the cursor movement amount information, and notify the processor 112 to display the cursor CRa at an appropriate position on the display panel 120 through the video output VO. In some embodiments, the signal processing circuit 114 can be implemented by a USB host (USBHost).

[0019] In addition, the signal processing circuit 114 transmits the cursor control signal CSa to one of the computing devices 101a and 101b according to the current coordinates of the cursor CRa, and the details will be described in the following paragraphs. In some embodiments, the signal processing circuit 114 is also coupled to the user input device 105a through the USB interface circuit 130 and the USB hub 140. The user input signal INa of the user input device 105a is transmitted to the same target along with the cursor control signal CSa. In some embodiments, the user input device 105a can be implemented by a keyboard. It should be noted that neither the cursor control signal CSa nor the user input signal INa is transmitted to the computing device 101a or the computing device 101b before being transmitted to the signal processing circuit 114.

[0020] The operation of the display panel control chip 110 for switching the signal transmission path will be further described below with reference to FIGS. 2A and 2B. Figure 2A FIG. is a schematic diagram of the cursor CRa moving on the screen of the display panel 120. As Figure 2A shown, the display panel 120 respectively displays the juxtaposed images 210 and 220 corresponding to the video signals VSa and VSb according to the video output VO, wherein the images 210 and 220 are adjacent to the boundary BLa. It is worth mentioning that the boundary BLa does not need to be an actual line displayed on the display panel 120, and the boundary BLa is used to represent the edge where the images 210 and 220 are joined together.

[0021] In this embodiment, the display panel 120 includes an edge 122 extending along the first direction D1. The coordinate Xa of the boundary BLa in the first direction D1 extends perpendicular to the first direction D1 (hereinafter briefly described as the boundary BLa having the coordinate Xa in the first direction D1). The signal processing circuit 114 stores the coordinate Xa, where the coordinate Xa can be pre-stored in the signal processing circuit 114 when the display system 100 leaves the factory, or after the processor 112 determines the area ratio of the images 210 and 220, the processor 112 then transmits the coordinate Xa to the signal processing circuit 114.

[0022] The signal processing circuit 114 determines whether the cursor CRa is located in the image 210 or 220 based on the cursor control signal CSa and the coordinate Xa to generate a determination result. The signal processing circuit 114 transmits the cursor control signal CSa and / or the user input signal INa to the corresponding one of the computing devices 101a and 101b based on this determination result.

[0023] For example, at a certain point in time, the signal processing circuit 114 calculates that the cursor CRa has the coordinate Xb in the first direction D1 based on the cursor control signal CSa. The signal processing circuit 114 further determines whether the cursor CRa is located in the image 210 based on the difference (e.g., relative magnitude relationship) between the coordinates Xa and Xb. Since the image 210 is generated based on the video signal VSa, the signal processing circuit 114 transmits the cursor control signal CSa and / or the user input signal INa to the signal source of the video signal VSa, that is, the computing device 101a. In this way, the user can control the computing device 101a through the cursor control device 103a and / or the user input device 105a.

[0024] At another point in time, the signal processing circuit 114 calculates that the cursor CRa has been moved to another position and has the coordinate Xc in the first direction D1 based on the cursor control signal CSa. The signal processing circuit 114 further determines whether the cursor CRa is located in the image 220 based on the difference (e.g., relative magnitude relationship) between the coordinates Xa and Xc. At this time, the signal processing circuit 114 transmits the cursor control signal CSa and / or the user input signal INa to the signal source of the video signal VSb, that is, the computing device 101b, so that the user can control the computing device 101b through the cursor control device 103a and / or the user input device 105a.

[0025] Figure 2B For explaining the operation of the processor 112 to change the area ratio of the images 210 and 220. In this embodiment, the processor 112 can change the area ratio of the images 210 and 220 (e.g., from Figure 2A 1:1 to Figure 2BFor example, as shown in FIG. 1:3), the coordinates of the boundary BLa in the first direction D1 will change accordingly. In some embodiments, the processor 112 is configured to receive an instruction from a button (not shown) on the display system 100 for the user to adjust the area ratio of the images 210 and 220, but the present application is not limited thereto. When the processor 112 changes the area ratio of the images 210 and 220, the processor 112 notifies the signal processing circuit 114 to update the coordinates of the stored boundary BLa in the first direction D1. At this time, the signal processing circuit 114 can determine whether to switch the transmission paths of the cursor control signal CSa and / or the user input signal INa according to the position of the cursor CRa.

[0026] For example, as Figure 2B shown, when the boundary BLa changes from having the coordinate Xa to having the coordinate Xd in the first direction D1, the processor 112 notifies the signal processing circuit 114 to update the coordinates of the stored boundary BLa (i.e., from the coordinate Xa to the coordinate Xd).

[0027] As Figure 2B can be seen, before the area ratio of the images 210 and 220 changes, the cursor CRa has the coordinate Xb in the first direction D1 and is located in the image 210. Therefore, the signal processing circuit 114 transmits the cursor control signal CSa and / or the user input signal INa to the computing device 101a.

[0028] After the area ratio of the images 210 and 220 changes, although the position of the cursor CRa remains unchanged, the signal processing circuit 114 can determine that the cursor CRa is currently located in the image 220 by comparing the difference between the coordinate Xd and the coordinate Xb. Therefore, the signal processing circuit 114 switches the transmission of the cursor control signal CSa and / or the user input signal INa to the computing device 101b.

[0029] The following will further illustrate another operation of the display panel control chip 110 for switching the signal transmission path in conjunction with FIGS. 3A and 3B. Figure 3A FIG. 3A is a schematic diagram of the cursor CRa moving in the screen of the display panel 120. As Figure 3A shown, the display panel 120 respectively displays the parent and child images 310 and 320 corresponding to the video signals VSa and VSb according to the video output VO, wherein the images 310 and 320 are adjacent to the boundary BLb. It is worth mentioning that the boundary BLb does not need to be an actual displayed line on the display panel 120. The boundary BLb is used to represent the joining edge of the images 310 and 320.

[0030] In this embodiment, the display panel 120 includes an edge 124 extending along the first direction D1 and an edge 126 extending along the second direction D2. The coordinate Xe of the boundary BLb in the first direction D1 extends perpendicular to the first direction D1, and the coordinate Ya in the second direction D2 extends perpendicular to the second direction D2 (hereinafter briefly described as the boundary BLb having coordinates Xe and Ya in the first direction D1 and the second direction D2 respectively). The signal processing circuit 114 stores the coordinates Xe and Ya of the boundary BLb, where the coordinates Xe and Ya may be pre-stored in the signal processing circuit 114 when the display system 100 leaves the factory, or after the processor 112 determines the area ratio of the images 310 and 320, the processor 112 then transmits the coordinates Xe and Ya to the signal processing circuit 114.

[0031] The signal processing circuit 114 determines whether the cursor CRa is located in the image 310 or 320 based on the cursor control signal CSa, the coordinate Xe, and the coordinate Ya to generate a determination result. The signal processing circuit 114 transmits the cursor control signal CSa to the corresponding one of the computing devices 101a and 101b according to this determination result.

[0032] For example, at a certain point in time, the signal processing circuit 114 calculates that the cursor CRa has the coordinate Xf in the first direction D1 and the coordinate Yb in the second direction D2 based on the cursor control signal CSa. The signal processing circuit 114 further determines that the cursor CRa is located in the image 310 based on the difference between the coordinates Xe and Xf and the difference between the coordinates Ya and Yb (for example, the relative magnitude relationship). Since the image 310 is generated based on the video signal VSa, the signal processing circuit 114 transmits the cursor control signal CSa and / or the user input signal INa to the computing device 101a. In this way, the user can control the computing device 101a through the cursor control device 103a and / or the user input device 105a.

[0033] At another point in time, the signal processing circuit 114 calculates that the cursor CRa is moved to another position and has the coordinate Xg in the first direction D1 and the coordinate Yc in the second direction D2 based on the cursor control signal CSa. The signal processing circuit 114 further determines that the cursor CRa is located in the image 320 based on the difference between the coordinates Xe and Xg and the difference between the coordinates Ya and Yc (for example, the relative magnitude relationship). At this time, the signal processing circuit 114 transmits the cursor control signal CSa and / or the user input signal INa to the computing device 101b so that the user can control the computing device 101b through the cursor control device 103a and / or the user input device 105a.

[0034] Figure 3BFor explaining the operation of the processor 112 to change the area ratio of the images 310 and 320. When the processor 112 changes the area ratio of the images 310 and 320, the coordinates of the boundary BLb in the first direction D1 and the second direction D2 will change accordingly. When the processor 112 changes the area ratio of the images 310 and 320, the processor 112 will notify the signal processing circuit 114 to update the coordinates of the stored boundary BLb. At this time, the signal processing circuit 114 can determine whether to switch the transmission paths of the cursor control signal CSa and / or the user input signal INa according to the position of the cursor CRa.

[0035] For example, as Figure 3B shown, when the boundary BLb changes from having the coordinate Xe to having the coordinate Xh in the first direction D1 and changes from having the coordinate Ya to having the coordinate Yd in the second direction D2, the processor 112 will notify the signal processing circuit 114 to update the stored coordinates Xe and Ya to the coordinates Xh and Yd respectively.

[0036] From Figure 3B it can be seen that before the area ratio of the images 310 and 320 changes, the cursor CRa has the coordinates Xf and Yb and is located in the image 310. Therefore, the signal processing circuit 114 will transmit the cursor control signal CSa and / or the user input signal INa to the computing device 101a. After the area ratio of the images 310 and 320 changes, although the position of the cursor CRa remains unchanged, the signal processing circuit 114 can determine that the cursor CRa is currently located in the image 320 by comparing the difference between the coordinate Xf and the coordinate Xh and the difference between the coordinate Yd and the coordinate Yb. Therefore, the signal processing circuit 114 will switch the transmission of the cursor control signal CSa and / or the user input signal INa to the computing device 101b.

[0037] From the above, it can be seen that the display system 100 allows the user to perform one-to-many control through a set of input devices, which helps to improve the space utilization efficiency of the desktop. Moreover, when the area ratio of the image changes, the display system 100 can automatically update the judgment conditions for switching the control object without relying on the assistance of the control object (such as the computing devices 101a and 101b), thus not occupying the computing resources of the control object.

[0038] Figure 4 FIG. 400 is a simplified functional block diagram of a display system 400 according to an embodiment of the present application. The display system 400 is similar to the display system 100, except that the display system 400 has a plurality of USB interface circuits 130 and a plurality of USB hubs 140. For the sake of simplicity, Figure 4 only two sets of combinations of the USB interface circuits 130 and the USB hubs 140 are shown, but the present application is not limited thereto.

[0039] In this embodiment, the display system 400 can be coupled to the cursor control devices 103a and 103b through a plurality of USB interface circuits 130 and a plurality of USB hubs 140 to receive the cursor control signals CSa and CSb from the cursor control devices 103a and 103b respectively. The signal processing circuit 114 can calculate the current coordinates of the cursors CRa and CRb according to the cursor control signals CSa and CSb respectively, and notify the processor 112 to display the cursors CRa and CRb at appropriate positions on the display panel 120 through the video output VO.

[0040] In addition, the signal processing circuit 114 will transmit the cursor control signal CSa to one of the computing devices 101a and 101b according to the current coordinates of the cursor CRa. Similarly, the cursor control signal CSb will also be transmitted to the corresponding one of the computing devices 101a and 101b due to the current coordinates of the cursor CRb. The details will be described in the following paragraphs. In some embodiments, the signal processing circuit 114 is also coupled to the user input devices 105a and 105b through the USB interface circuit 130. The user input signal INa of the user input device 105a will be transmitted to the same target as the cursor control signal CSa, and the user input signal INb of the user input device 105b will be transmitted to the same target as the cursor control signal CSb.

[0041] The following will cooperate with Figure 5 to further illustrate the operation of the display panel control chip 410 for switching the signal transmission path. Figure 5 FIG. is a schematic diagram of the movement of the cursor CRb in the screen of the display panel 120. As Figure 5 shown, the display panel 120 respectively displays the juxtaposed images 510 and 520 corresponding to the video signals VSa and VSb according to the video output VO, wherein the images 510 and 520 are adjacent to the boundary BLa.

[0042] At a certain point in time, the signal processing circuit 114 will determine that the cursor CRa is located in the image 510 according to the cursor control signal CSa (i.e., the coordinates of the cursor CRa in the first direction D1) and the coordinates of the boundary BLa in the first direction D1. The signal processing circuit 114 will also determine that the cursor CRb is located in the image 520 according to the cursor control signal CSb (i.e., the coordinates of the cursor CRb in the first direction D1) and the coordinates of the boundary BLa in the first direction D1. Therefore, the signal processing circuit 114 will transmit the cursor control signal CSa and / or the user input signal INa to the computing device 101a, and transmit the cursor control signal CSb and / or the user input signal INb to the computing device 101b.

[0043] At another time point, the signal processing circuit 114 also determines that the cursor CRb moves from the image 520 to the image 510 based on the cursor control signal CSb (i.e., the coordinate of the cursor CRb in the first direction D1) and the coordinate of the boundary BLa in the first direction D1. At this time, the signal processing circuit 114 transmits both the cursor control signal CSa and / or the user input signal INa and the cursor control signal CSb and / or the user input signal INb to the computing device 101a. In this way, different users can jointly control the computing device 101a through their respective input devices (such as a keyboard and a mouse) without exchanging the input devices, enabling the users to quickly assist each other during work.

[0044] In an embodiment where the display system 400 displays a split screen, the display system 400 can also transmit the cursor control signals CSa and CSb to the same target or separately to different targets based on the cursor control signals CSa and CSb and the coordinates of the boundaries of the split screen in the first direction D1 and the second direction D2. The display system 400 can use the Figure 3A method described above to determine whether the signal transmission path of any one of the cursor control signals CSa and CSb needs to be switched. For the sake of brevity, it will not be repeated here.

[0045] In some embodiments where the display system 400 can change the area ratio of the images, the display system 400 can adopt the Figure 2B or Figure 3B method described above to individually judge the positions of the cursors CRa and CRb to determine whether the signal transmission path of any one of the cursor control signals CSa and CSb needs to be switched. For the sake of brevity, it will not be repeated here.

[0046] The remaining connection methods, components, embodiments, and advantages of the foregoing display system 100 are all applicable to the display device 400. For the sake of brevity, it will not be repeated here.

[0047] In some embodiments where the display panel control chip 110 has a relatively large number of input / output pins, Figure 1 and Figure 4 the USB hub 140 in

[0048] In the specification and the claims for patent, certain terms are used to refer to specific elements. However, those of ordinary skill in the art should understand that the same element may be referred to by different terms. The specification and the claims for patent do not use the difference in names as a way to distinguish elements, but rather use the difference in the functions of the elements as the basis for distinction. The term "comprising" mentioned in the specification and the claims for patent is an open-ended term and should be interpreted as "comprising but not limited to". In addition, "coupled" herein includes any direct and indirect connection means. Therefore, if it is described in the text that the first element is coupled to the second element, it means that the first element can be directly connected to the second element through electrical connection, wireless transmission, optical transmission or other signal connection means, or can be indirectly electrically or signal-connected to the second element through other elements or connection means.

[0049] The description method of "and / or" used herein includes any combination of one or more of the listed items. In addition, unless specifically specified in the specification, any singular term also includes the plural meaning.

[0050] The above are only the preferred embodiments of this application. All equivalent changes and modifications made according to the claims of this application shall fall within the scope covered by this application.

[0051] Symbol Description

[0052] 100, 400: Display system

[0053] 101a, 101b: Computing device

[0054] 103a, 103b: Cursor control device

[0055] 105a, 105b: User input device

[0056] 110: Display panel control chip

[0057] 112: Processor

[0058] 114: Signal processing circuit

[0059] 120: Display panel

[0060] 122, 124, 126: Edge

[0061] 130: Universal Serial Bus (USB) interface circuit

[0062] 140: USB hub

[0063] 210, 220, 310, 320, 510, 520: Image

[0064] BLa, BLb: Boundary

[0065] CSa, CSb: Cursor control signals

[0066] CRa, CRb: Cursor

[0067] D1: First direction

[0068] D2: Second direction

[0069] INa, INb: User input signals

[0070] VSa, VSb: Video signals

[0071] VO: Video output

[0072] Xa, Xb, Xc, Xd, Xe, Xf, Xh, Xg, Ya, Yb, Yc, Yd: Coordinates

Claims

1. A display panel control chip, comprising: A processor for controlling a display panel to display a first image and a second image corresponding to a first video signal and a second video signal respectively, wherein the first image and the second image are adjacent to a boundary, and a first coordinate of the boundary in a first direction is perpendicular to the first direction and extends; and A signal processing circuit for storing the first coordinate, and for determining whether a first cursor is located in the first image or the second image based on at least a first cursor control signal and the first coordinate to generate a first determination result, and for transmitting the first cursor control signal to one of a first signal source of the first video signal and a second signal source of the second video signal according to the first determination result; Wherein when an area ratio between the first image and the second image changes, the processor notifies the signal processing circuit to update the first coordinate, Wherein, A second coordinate of the boundary in a second direction is perpendicular to the second direction and extends, the first direction is different from the second direction, and the signal processing circuit stores the second coordinate; Wherein the signal processing circuit generates the first determination result based on the first cursor control signal, the first coordinate and the second coordinate; Wherein when an area ratio between the first image and the second image changes, the processor notifies the signal processing circuit to update the first coordinate and the second coordinate.

2. The display panel control chip according to claim 1, Wherein, The signal processing circuit is further configured to transmit a first user input signal different from the first cursor control signal to one of the first signal source and the second signal source according to the first determination result.

3. The display panel control chip according to claim 2, Wherein, Before any one of the first cursor control signal and the first user input signal is transmitted to the signal processing circuit, it is not transmitted to the first signal source or the second signal source.

4. The display panel control chip according to claim 1, Wherein, The signal processing circuit is further configured to determine whether a second cursor is located in the first image or the second image based on at least a second cursor control signal and the first coordinate to generate a second determination result, and for transmitting the second cursor control signal to one of the first signal source and the second signal source according to the second determination result.

5. The display panel control chip according to claim 4, Wherein, A second coordinate of the boundary in a second direction is perpendicular to the second direction and extends, the first direction is different from the second direction, and the signal processing circuit stores the second coordinate; Wherein the signal processing circuit generates the first determination result based on the first cursor control signal, the first coordinate and the second coordinate, and generates the second determination result based on the second cursor control signal, the first coordinate and the second coordinate; Wherein when an area ratio between the first image and the second image changes, the processor notifies the signal processing circuit to update the first coordinate and the second coordinate.

6. The display panel control chip according to claim 1, Wherein, The signal processing circuit is a universal serial bus master.

7. A signal transmission switching method, applicable to a display panel control chip, comprising: Controlling a display panel to display a first image and a second image corresponding to a first video signal and a second video signal respectively, wherein the first image and the second image are adjacent to a boundary, and a first coordinate of the boundary in a first direction is perpendicular to the first direction and extends; Judging whether a first cursor is located in the first image or the second image according to at least a first cursor control signal and the first coordinate to generate a first judgment result; Transmitting the first cursor control signal to one of a first signal source of the first video signal and a second signal source of the second video signal according to the first judgment result; and When an area ratio between the first image and the second image changes, updating the first coordinate stored in the display panel control chip, wherein, A second coordinate of the boundary in a second direction is perpendicular to the second direction and extends, and the first direction is different from the second direction; wherein the first judgment result is generated according to the first cursor control signal, the first coordinate and the second coordinate; wherein when an area ratio between the first image and the second image changes, the first coordinate and the second coordinate stored in the display panel control chip are updated.

8. A display system, comprising: A display panel; and A display panel control chip, coupled to the display panel, and comprising: A processor, configured to control the display panel to display a first image and a second image corresponding to a first video signal and a second video signal respectively, wherein the first image and the second image are adjacent to a boundary, and a first coordinate of the boundary in a first direction is perpendicular to the first direction and extends; and A signal processing circuit, configured to store the first coordinate, and configured to judge whether a first cursor is located in the first image or the second image according to at least a first cursor control signal and the first coordinate to generate a judgment result, and configured to transmit the first cursor control signal to one of a first signal source of the first video signal and a second signal source of the second video signal according to the judgment result; wherein when an area ratio between the first image and the second image changes, the processor notifies the signal processing circuit to update the first coordinate, wherein, A second coordinate of the boundary in a second direction is perpendicular to the second direction and extends, the first direction is different from the second direction, and the signal processing circuit stores the second coordinate; wherein the signal processing circuit generates a first judgment result according to the first cursor control signal, the first coordinate and the second coordinate; wherein when an area ratio between the first image and the second image changes, the processor notifies the signal processing circuit to update the first coordinate and the second coordinate.

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