CN112540738A

CN112540738A - Display capable of switching image sources and operating system

Info

Publication number: CN112540738A
Application number: CN201910894146.8A
Authority: CN
Inventors: 张桂山; 陈金辉; 衷尔佳; 周振强; 张世滨
Original assignee: Giga Byte Technology Co Ltd
Current assignee: Giga Byte Technology Co Ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2021-03-23

Abstract

A display capable of switching image sources comprises a first transmission interface, a second transmission interface, a system-on-chip and a display panel. The first transmission interface is used for being coupled with a first electronic device and receiving a first image signal and selection information from the first electronic device. The second transmission interface is coupled to a second electronic device and receives a second image signal from the second electronic device. The SCM selects at least one of the first and second image signals according to the selection information to generate a video signal. The display panel presents a picture according to the video signal.

Description

Display capable of switching image sources and operating system

Technical Field

The present invention relates to a display, and more particularly, to a display capable of switching image sources.

Background

Generally, a personal computer generally includes a screen, a host, and a plurality of external devices (e.g., a mouse and a keyboard). Many users currently have more than two personal computers. When a user needs to use a plurality of personal computers, the user needs to open a plurality of screens and use a plurality of groups of peripheral equipment to control a plurality of hosts, thereby greatly increasing the inconvenience.

Disclosure of Invention

The invention provides a display capable of switching image sources, which comprises a first transmission interface, a second transmission interface, a system on chip and a display panel. The first transmission interface is used for being coupled with a first electronic device and receiving a first image signal and selection information from the first electronic device. The second transmission interface is coupled to a second electronic device and receives a second image signal from the second electronic device. The SCM selects at least one of the first and second image signals according to the selection information to generate a video signal. The display panel presents a picture according to the video signal.

The invention further provides an operating system, which includes a first electronic device, a second electronic device and a display. The first electronic device provides a first image signal and selection information. The second electronic device provides a second image signal. The display comprises a first transmission interface, a second transmission interface, a system-on-chip and a display panel. The first transmission interface is used for being coupled with the first electronic device and receiving the first image signal and the selection information. The second transmission interface is used for being coupled with a second electronic device and receiving a second image signal. The SCM selects at least one of the first and second image signals according to the selection information to generate a video signal. The display panel presents a picture according to the video signal.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a schematic diagram of an operating system of the present invention.

FIG. 2 is a schematic diagram of the operation of the display according to the present invention.

FIG. 3 is another schematic diagram of the operation of the display according to the present invention.

Fig. 4A and 4B are schematic diagrams of selection screens according to the present invention.

FIG. 5A is a schematic diagram of a system-on-a-wafer according to one embodiment of the present invention.

FIG. 5B shows another embodiment of a system-on-a-wafer of the present invention.

FIG. 5C is a schematic diagram of another embodiment of a system-on-a-wafer according to the present invention.

FIG. 5D shows another embodiment of a system-on-chip of the present invention.

Wherein, the reference numbers:

100: an operating system; 110: a display;

120. 130, 130: an electronic device; 140: a peripheral device;

IMG₁、IMG₂: an image signal; FI. FI₁～FI₃: inputting information;

FO: outputting the information; 111. 112, 112: a transmission interface;

113: a system-on-a-chip; 114 to 116: a peripheral interface;

117: a display panel; PI (proportional integral)₁、PI₂: an image transmission port;

PD₁、PD₂: a data transmission port; FS (file system)₁、FS₂: selecting information;

118: a specific region; 119: a cursor;

141: a mouse; 142: a keyboard;

143: a USB flash disk; 300. 400: selecting a picture;

310. 311, 312, 320, 321: selecting an option;

321: a brightness adjustment axis; 410: a touch screen;

510: a control circuit; 520: a switching circuit;

SC₁、SC₂: a control signal;and (3) SI: a video signal;

PA₁～PA₄: a path; 521. 522: a switch module;

511-514: a controller; 530: a hub;

531: an upstream port; 532-534: and a downstream port.

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

in order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. The present description provides various examples to illustrate the technical features of various embodiments of the present invention. The configuration of the elements in the embodiments is for illustration and not for limitation. In addition, the reference numerals in the embodiments are partially repeated to simplify the description, and do not indicate the relationship between different embodiments.

FIG. 1 is a schematic diagram of an operating system of the present invention. As shown, the operating system 100 includes a display 110,

electronic devices

120 and 130, and a peripheral device 140. In the present embodiment, the

electronic devices

120 and 130 share the display 110 and the peripheral device 140. For example, when the electronic device 120 is coupled to the display 110, the display 110 presents a picture according to the image signal IMG1 provided by the electronic device 120. At this time, the electronic device 120 receives an input information FI from the peripheral device 140 via the display 110, or sends an output information FO to the peripheral device 140 via the display 110. When the electronic device 130 is coupled to the display 110, the display 110 displays a picture according to the image signal IMG2 provided by the electronic device 130. At this time, the electronic device 130 receives the input information FI from the peripheral device 140 through the display 110 or sends the output information FO to the peripheral device 140 through the display 110.

In other embodiments, when the display 110 displays the image according to the image signal IMG1 provided by the electronic device 120, if the electronic device 130 is coupled to the display 110, the display 110 continues to display the image according to the image signal IMG1 provided by the electronic device 120. In some embodiments, after the display 110 is powered on, if the display 110 finds that the

electronic devices

120 and 130 respectively provide the image signals IMG1 and IMG2, the display 110 may select the image signal IMG1 or IMG2 according to a predetermined value. For example, when the preset value is pointed to the electronic device 120, the display 110 presents a picture according to the image signal IMG 1. However, when the preset value is directed to the electronic device 130, the display 110 presents a picture according to the image signal IMG 2. In one possible embodiment, the preset value is stored in the display 110 in advance.

The present invention is not limited to the types of the

electronic devices

120 and 130. Any device that can output an image may be used as the

electronic device

120 or 130. In one embodiment, at least one of the

electronic devices

120 and 130 is a host, a tablet, a notebook computer, or a smart phone.

In other embodiments, if the display 110 finds that the

electronic devices

120 and 130 respectively provide the image signals IMG1 and IMG2, the display 110 displays a PIP picture according to the image signals IMG1 and IMG 2. For example, if the electronic device 120 is coupled to the display 110 earlier, the display 110 displays a main frame according to the image signal IMG1 of the electronic device 120 and displays a sub-frame according to the image signal IMG2 of the electronic device 130. At this time, the electronic device 120 can communicate with the peripheral device 140 through the display 110, and the electronic device 130 cannot communicate with the peripheral device 140 through the display 110.

In some embodiments, if the display 110 finds that the

electronic devices

120 and 130 respectively provide the image signals IMG1 and IMG2, the display 110 may present two frames with similar sizes. For example, the display 110 can present a first frame according to the image signal IMG1 and a second frame according to the image signal IMG2, wherein the first frame can be located on the left or right of the second frame. In the present embodiment, the display 110 includes

transmission interfaces

111 and 112, a System On Chip (SOC) 113, a peripheral interface 114, and a display panel 117.

The transmission interface 111 is coupled to the electronic device 120 and receives the image signal IMG 1. The present invention does not limit how the transmission interface 111 receives the image signal IMG 1. In one possible embodiment, the transmission interface 111 receives the image signal IMG1 through a transmission line. In another possible embodiment, the transmission interface 111 includes a wireless transceiver (not shown). In this example, the transmission interface 111 receives the image signal IMG1 in a wireless manner.

In the present embodiment, the transmission interface 111 includes an image transmission port PI1 and a data transmission port PD 1. The image transmission port PI1 is used for receiving an image signal IMG 1. The data transfer port PD1 is used for transferring data. For example, the data port PD1 may send input information FI to the electronic device 120 or send output information FO to the peripheral device 140. In other embodiments, the data port PD1 may transmit selection information FS1 generated by the electronic device 120 to the soc 113. In this case, the soc 113 may operate according to the selection information FS1, such as adjusting the video signal SI, or may issue a control signal (not shown) to adjust the state of the display panel 117, such as brightness. In other embodiments, the selection information FS1 may be integrated into the image signal IMG 1. Therefore, the image transfer port PI1 can also transmit the selection information FS 1.

The invention is not limited to the type of the image transfer port PI 1. In one possible embodiment, the image transmission Port PI1 is a High Definition Multimedia Interface (HDMI) connection Port, a Display Port (DP) connection Port, a Video Graphics Array (VGA) connection Port, a Digital Video Interface (DVI) connection Port, or a Universal Serial Bus C (USB Type C) connection Port.

In some embodiments, when the image transmission port PI1 is a USB Type C connection port, the USB Type C connection port can transmit data (such as output information FO, input information FI, and selection information FS1) in addition to the image signal IMG1, so that the data transmission port PD1 can be omitted. In addition, the invention also does not limit the type of the data transmission port PD 1. Any port capable of transmitting data may be used as the data transmission port PD 1. In one embodiment, the data transfer port PD1 is a USB port.

The transmission interface 112 is coupled to the electronic device 130 and receives the image signal IMG 2. In the present embodiment, the transmission interface 112 includes an image transmission port PI2 and a data transmission port PD 2. The image transmission port PI2 is used for receiving an image signal IMG 2. The data transfer port PD2 is used for transferring data. Since the characteristics of the image port PI2 and the data port PD2 are similar to those of the image port PI1 and the data port PD1, further description is omitted.

In some embodiments, image transfer port PI2 may be the same or different from image transfer port PI 1. For example, the image transmission ports PI1 and PI2 may be HDMI connection ports. In other embodiments, the image port PI1 is a DP port and the image port PI2 is an HDMI port. In addition, the present invention does not limit the number of transmission interfaces. In other embodiments, the display 110 has more transmission interfaces for receiving image signals from different electronic devices.

The peripheral interface 114 is used for coupling with a peripheral device 140. The peripheral interface 114 may receive input information FI generated by the peripheral device 140 or provide output information FO to the peripheral device 140 by wire or wirelessly. The present invention is not limited to the type of peripheral interface 114. In one embodiment, the peripheral interface 114 includes a USB port. The number of peripheral interfaces is not limited in the present invention. In other embodiments, the display 110 may have more peripheral interfaces for coupling with more peripheral devices.

The system-on-chip 113 generates a video signal SI according to at least one of the image signals IMG1 and IMG 2. The display panel 117 presents a picture according to the video signal SI. For example, when the electronic device 120 is coupled to the transmission interface 111 and the electronic device 130 is not coupled to the transmission interface 112, the system-on-chip 113 receives and processes the image signal IMG1 provided by the electronic device 120 to generate the video signal SI. Therefore, the display screen of the display panel 117 is controlled by the electronic device 120.

The invention is not limited to how the system-on-chip 113 processes the image signal IMG 1. In one possible embodiment, the system-on-chip 113 directly uses the image signal IMG1 as the video signal SI. In addition, the soc 113 further conducts a data path (not shown) between the data port PD1 and the peripheral interface 114, so that the electronic device 120 can receive the input information FI from the peripheral device 140 or provide the output information FO to the peripheral device 140. In other embodiments, when the transmission interface 111 has a specific transmission port (e.g., USB Type C), the soc 113 connects the data path between the data pin of the specific transmission port and the peripheral interface 114.

When the electronic device 120 is not coupled to the transmission interface 111 and the electronic device 130 is coupled to the transmission interface 112, the system-on-chip 113 receives and processes the image signal IMG2 to generate the video signal SI. In one possible embodiment, the system-on-chip 113 directly uses the image signal IMG2 as the video signal SI. At this time, the system-on-chip 113 connects a data path (not shown) between the data port PD2 and the peripheral interface 114. Therefore, the electronic device 130 can receive the input information FI from the peripheral device 140 or provide the output information FO to the peripheral device 140.

When the

electronic devices

120 and 130 are both coupled to the transmission interfaces 111 and 112, the soc chip 113 generates the video signal SI according to a predetermined value. For example, if the default value is directed to the transmission interface 111, the soc 113 generates the video signal SI according to the image signal IMG1 and conducts the data path between the transmission interface 111 and the peripheral interface 114. If the default value is pointed to the transmission interface 112, the SoC 113 generates the video signal SI according to the image signal IMG2 and conducts the data path between the transmission interface 112 and the peripheral interface 114. In other embodiments, the system-on-chip 113 receives and integrates the image signals IMG1 and IMG2 according to the default value. The display panel 117 displays a PIP frame or two adjacent frames with similar sizes according to the integrated result (i.e. the video signal SI) of the SCM 113. In this case, only a single electronic device (e.g., 120 or 130) can communicate with the peripheral device 140 through the peripheral interface 114.

In other embodiments, the SoC 113 may perform a specific action according to the selection information FS1 or FS2 sent by the

electronic device

120 or 130. The specific action may be to switch the source of the image signal. For example, when the system-on-chip 113 generates the video signal SI according to the image signal IMG1 provided by the electronic device 120, if the electronic device 120 sends the selection information FS1, the system-on-chip 113 instead uses the image signal IMG2 from the electronic device 130 and generates the video signal SI according to the image signal IMG 2. At this time, the soc 113 cuts off the data path between the electronic device 120 and the peripheral device 140 and turns on the data path between the electronic device 130 and the peripheral device 140. However, if the electronic device 130 is not coupled to the transmission interface 112, the system-on-chip 113 may continue to generate the video signal SI according to the image signal IMG 1. In one embodiment, the SoC 113 adds a notification image component to the video signal SI to present a notification document on the display panel 117 to inform the user that the electronic device 130 is not connected to the transmission interface 112. In another possible embodiment, the system-on-chip 113 may not present a frame because the image signal IMG2 is not received by the system-on-chip 113. However, as long as the electronic device 130 is coupled to the transmission interface 112, the system-on-chip 113 can generate the video signal SI according to the image signal IMG2 immediately.

In other embodiments, the SoC 113 may control the state of the display panel 117, such as brightness or resolution, according to the selection information FS1 or FS2 sent by the

electronic device

120 or 130, via the video signal SI or an additional control signal (not shown). In some embodiments, the SoC-on-chip 113 may rotate the display screen of the display panel 117 according to the selection information FS1 or FS2 sent by the

electronic device

120 or 130.

The format of the selection information FS1 and FS2 is not limited in the present invention. Taking the selection information FS1 as an example, in one possible embodiment, the selection information FS1 is integrated into the image signal IMG 1. The SoC 113 can retrieve the selection information FS1 by decoding the video signal IMG1, and switch the source of the video signal or adjust the video signal SI according to the selection information FS 1.

The invention does not limit when the

electronic devices

120 and 130 generate the selection information FS1 and FS 2. When a trigger event occurs, the electronic device 120 generates selection information FS1 to the soc chip 113. The invention does not limit the kind of triggering event. The triggering event may come from the

electronic device

120 or 130. Taking the electronic device 120 as an example, assume that the electronic device 120 is a smart phone having a touch screen. In this case, when a selected application of the electronic device 120 is turned on, the electronic device 120 detects whether a trace pattern appears on the touch screen. If so, a triggering event is indicated. Therefore, the electronic device 120 sends the selection information FS1 to instruct the system-on-chip 113 to perform a specific action, such as switching the image source or adjusting the state of the display panel 117. In another possible embodiment, the triggering event may come from the peripheral device 140. For example, if the peripheral device 140 is a keyboard, when the user presses a hot key (e.g., presses the F2 key twice in succession), a triggering event is indicated. Accordingly, the electronic device 120 generates the selection information FS 1.

FIG. 2 is a schematic diagram of the operation of the display according to the present invention. In the present embodiment, the electronic device 120 is a smart phone having a touch screen 210. In addition, the electronic device 130 is a host. In this example, the transmission interfaces 111 and 112 may be USB Type C ports, but are not limited thereto.

When the user opens a switching application of the electronic device 120, the touch screen 210 presents a selection frame 200 for the user to switch the source of the image signal. At this time, the frame of the display panel 117 may be synchronized with the frame of the touch screen 210. In the present embodiment, the electronic device 120 detects a trace pattern drawn by a user on the touch screen 210, and provides a selection message FS1 to the display 110 according to the detection result. A system-on-chip (not shown) in the display 110 selects a source of the image signal according to the selection information FS 1.

For example, when the user's finger touches the touch screen 210 and slides to the right, the electronic device 120 sends the selection information FS 1. At this time, since the selection information FS1 meets a first predetermined condition, the display 110 selects the image signal IMG2 provided by the electronic device 130 and presents a picture according to the image signal IMG 2. In addition, the display 110 conducts the data path between the transmission interface 112 and each of the peripheral interfaces 114-116. Therefore, the user can operate the electronic device 130 through the mouse 141 and the keyboard 142. In addition, the electronic device 130 can also access the USB flash drive 143.

In other embodiments, when the user's finger touches the touch screen 210 and slides upward, the electronic device 120 sends out the selection information FS1 according to the user's gesture. At this time, since the selection information FS1 meets a second predetermined condition, the display 110 increases the brightness of the display panel 117. However, if the user's finger touches the touch screen 210 of the electronic device 120 and slides down, the display 110 decreases the brightness of the display panel 117. In other implementations, the user can adjust the frame presented by the display panel 117 by selecting the frame 200. For example, when the user's finger touches the touch screen 210 of the electronic device 120 and slides to the lower right, the frame displayed on the display panel 117 may rotate 90 degrees to the right.

FIG. 3 is another schematic diagram of the operation of the display according to the present invention. In the present embodiment, the

electronic devices

120 and 130 are hosts (host), and the display 110 further includes

peripheral interfaces

115 and 116. Since the characteristics of the

peripheral interfaces

115 and 116 are similar to those of the peripheral interface 114, they are not described in detail. In the present embodiment, the peripheral interface 114 is coupled to a mouse 141. The peripheral interface 115 is coupled to the keyboard 142. The peripheral interface 116 is coupled to the USB flash drive 143.

For convenience of explanation, it is assumed that the display 110 presents a picture according to the image signal IMG 1. In this example, when the user moves the mouse 141, the mouse 141 generates an input FI 1. The electronic device 120 adjusts the image signal IMG1 to change the position of the cursor 119 according to the input information FI 1. In addition, when the user presses the keyboard 142, the keyboard 142 generates an input information FI 2. The electronic device 120 adjusts the image signal IMG1 according to the input information FI2, so as to present the characters input by the user on the display panel 117. In addition, the USB flash drive 143 may provide an input FI3 to the electronic device 120, or receive and store an output FO from the electronic device 120.

In the present embodiment, the display panel 117 has a specific region 118. When the user moves the cursor 119 to the specific region 118 through the mouse 141 or the keyboard 142, and the duration of the cursor 119 in the specific region 118 reaches a preset time (e.g., 3 seconds), the specific region 118 presents a selection screen for the user to select the image input source. In other embodiments, the user may cause the particular area 118 to present a selection of days by certain specific keys, a specific sequence of presses, or a combination of keys of the keypad 142. For example, when the user presses the F2 key of the keyboard 142 twice in succession, the specific area 118 presents a selection screen. In another possible embodiment, the display 110 directly switches the image source when the user presses the F2 key of the keypad 142 twice in a row.

FIGS. 4A and 4B are schematic diagrams of selection screens according to the present invention. As shown, selection screen 400 includes an input source option 410. In other embodiments, the selection frame 400 has more options for the user to adjust the state of the display panel 117, such as brightness, resolution, or rotate the frame presented by the display panel 117.

In FIG. 4A, when the user clicks the input source option 410, the source of the video signal can be changed. For example, when the user clicks the option 411, the soc 113 generates the video signal SI to the display panel 117 according to the image signal IMG1 from the electronic device 120. At this time, the SCM 113 turns on the data path between the electronic device 120 and each of the peripheral interfaces 114-116, and cuts off the data path between the electronic device 130 and the peripheral interfaces 114-116. If the user selects the option 412, the SoC 113 generates the video signal SI to the display panel 117 according to the image signal IMG2 provided by the electronic device 130. At this time, the SCM 113 turns on the data path between the electronic device 130 and each of the peripheral interfaces 114-116, and cuts off the data path between the electronic device 120 and the peripheral interfaces 114-116.

In other embodiments, the SoC 113 maintains a data path between the electronic device 120 and each of the peripheral interfaces 114-116 if the electronic device 130 is not coupled to the transmission interface 112 and the user clicks the option 412. Therefore, the soc 113 continues to generate the video signal SI to the display panel 117 according to the image signal IMG 1. In one embodiment, the soc 113 adjusts the video signal SI to present a notification frame on the display panel 117 to notify the user that the electronic device 130 is not coupled to the transmission interface 112. In another embodiment, if the electronic device 130 is not coupled to the transmission interface 112 and the user clicks the option 412, the display panel 117 may present a black frame until the electronic device 130 is coupled to the transmission interface 112.

In other embodiments, the selection frame 400 further includes a brightness option 420. In FIG. 4B, when the user clicks the brightness option 420, the brightness of the display panel 117 can be changed. For example, when the user moves the brightness adjustment shaft 421 to the right, the brightness of the display panel 117 increases. When the user moves the brightness adjustment shaft 421 to the left, the brightness of the display panel 117 is decreased.

The present invention does not limit the size of the selection screen 400. In one possible embodiment, as the resolution of the display panel 117 increases, the images presented by the display panel 117 all become smaller. At this time, the selection screen 400 has a larger area for the user to click. As the resolution of the display panel 117 decreases, the images presented by the display panel 117 all become larger. At this time, the selection frame 400 has a smaller area to avoid the selection frame 400 occupying most of the frame.

Fig. 5A is a schematic diagram of a single-system-on-wafer 113 according to an embodiment of the invention. As shown, the soc chip 113 includes a control circuit 510 and a switch circuit 520. The control circuit 510 generates control signals SC1 and SC2 according to the voltage levels of the transmission interfaces 111 and 112 to control the switch circuit 520. In one possible embodiment, the control circuit 510 is a scaler (scaler).

In the present embodiment, the control circuit 510 determines whether the

electronic devices

120 and 130 provide the image signals IMG1 and IMG2 according to the voltage levels of the image transmission ports PI1 and PI2, and generates the control signals SC1 and SC2 according to the determination result. For example, when the image signal IMG1 is not received by the image port PI1, the voltage level of a specific pin of the image port PI1 is equal to an initial value. When the image transmission port PI1 receives the image signal IMG1, the voltage level of the specific pin of the image transmission port PI1 is not equal to the initial value. Therefore, the control circuit 510 can know whether the

electronic devices

120 and 130 provide the image signals IMG1 and IMG2 according to the voltage level of the specific pins of the image transmission ports PI1 and PI 2.

In other embodiments, the control circuit 510 receives the selection information FS1 and FS2 through the data transmission ports PD1 and PD2, and adjusts the control signals SC1 and SC2 according to the selection information FS1 and FS 2. In some embodiments, the control circuit 510 further adjusts the video signal SI according to the selection information FS1 and FS 2.

The switch circuit 520 is coupled to the transmission interfaces 111 and 112, and turns on at least one of the image path PA1 between the transmission interface 111 and the control circuit 510 and the image path PA2 between the transmission interface 112 and the control circuit 510 according to the control signal SC 1. In addition, the switch circuit 520 turns on the data path PA3 between the transmission interface 111 and the peripheral interface 114 or turns on the data path PA4 between the transmission interface 112 and the peripheral interface 114 according to the control signal SC 2.

The present invention is not limited to the architecture of the switching circuit 520. In the present embodiment, the switch circuit 520 includes a switch module 521. The switch module 521 controls the image paths PA1 and PA2 according to a control signal SC 1. The image path PA1 is coupled between the transmission interface 111 and the control circuit 510. The image path PA2 is coupled between the transmission interface 112 and the control circuit 510.

When the control signal SC1 satisfies a first state (e.g., the potential of the control signal SC1 is equal to a first voltage), the switch module 521 turns on the image path PA1 and turns off the image path PA 2. Therefore, the image path PA1 transmits the image signal IMG1 to the control circuit 510. When the control signal SC1 is in a second state (e.g., the voltage level of the control signal SC1 is equal to a second voltage), the switch module 521 turns on the image path PA2 and turns off the image path PA 1. Therefore, the image path PA2 transmits the image signal IMG2 to the control circuit 510. In other embodiments, when the control signal SC1 is in a third state (e.g., the level of the control signal SC1 is equal to a third voltage), the switch module 521 turns on the image paths PA1 and PA2 to provide the image signals IMG1 and IMG2 to the control circuit 510.

In other embodiments, the switch circuit 520 further includes a switch module 522. The switching circuit 520 includes a switching module 521. The switch module 521 controls the data paths PA3 and PA4 according to a control signal SC 2. The data path PA3 is coupled between the transmission interface 111 and the peripheral interface 114. The data path PA4 is coupled between the transmit interface 112 and the peripheral interface 114.

When the control signal SC2 satisfies a first state (e.g., the potential of the control signal SC2 is equal to the first voltage), the switch module 522 turns on the data path PA 3. Therefore, the electronic device 120 can receive the input information FI from the peripheral interface 114 or provide the output information FO to the peripheral interface 114. When the control signal SC2 conforms to a second state (e.g., the voltage level of the control signal SC2 is equal to the second voltage), the switch module 522 turns on the data path PA 4. Therefore, the electronic device 130 can receive the input information FI from the peripheral interface 114 or provide the output information FO to the peripheral interface 114.

For convenience of illustration, fig. 5A only shows the

electronic devices

120 and 130. Thus, the switch module 522 provides two data paths (i.e., PA3 and PA 4). In other embodiments, the switch module 522 provides more data paths when the soc die 113 is coupled to more electronic devices. In addition, the switch circuit 520 may have more switch modules 522. In this example, each switch module 522 is coupled between a peripheral interface and multiple electronic devices.

Fig. 5B shows another embodiment of the system-on-a-wafer 113 according to the present invention. In the present embodiment, the soc chip 113 includes

controllers

511 and 512 and switch

modules

521 and 522. The controller 511 generates a control signal SC1 for commanding the switch module 521 to output at least one of the image numbers IMG1 and IMG2 according to the trigger signal ST. In some embodiments, the controller 511 may decode the image signal IMG1 or IMG2 to obtain the selection information FS1 or FS2, and then adjust the video signal SI according to the selection information FS1 or FS 2.

The controller 512 detects voltage levels of the image pins of the transmission interfaces 111 and 112 to determine whether the

electronic devices

120 and 130 provide the image signals IMG1 and IMG2, and generates the trigger signal ST and the control signal SC2 according to the determination result. For example, when the electronic device 120 is coupled to the transmission interface 111. The controller 512 notifies the controller 511 of the trigger signal ST. In this case, the controller 511 generates the control signal SC1 to instruct the switch module 521 to turn on the image path PA 1. At this time, the switching module 521 does not turn on the image path PA 2. In addition, the controller 512 commands the switch module 522 to turn on the data path PA3 and turn off the data path PA4 through the control signal SC 2. Thus, the electronic device 120 receives input information FI from the peripheral interface 114 via the data path PA3 or provides output information FO to the peripheral interface 114.

In other embodiments, the electronic device 130 is coupled to the transmission interface 111. The controller 512 informs the controller 511 via a trigger signal ST. Accordingly, the controller 511 commands the switching module 521 to turn on the image path PA 2. At this time, the switching module 521 does not turn on the image path PA 1. In addition, the controller 512 commands the switch module 522 to turn on the data path PA4 and turn off the data path PA3 through the control signal SC 2. Therefore, the electronic device 130 receives input information FI from the peripheral interface 114 or provides output information FO to the peripheral interface 114 via the data path PA 4.

In one possible embodiment, the controller 511 and the switch module 521 are integrated in a first Integrated Circuit (IC). In this example, the controller 512 and the switch module 522 are integrated into a second integrated circuit. The first and second integrated circuits each operate independently. In another embodiment, the controller 512 receives the selection information FS1 or FS2 and provides the selection information FS1 or FS2 to the controller 511 through another transmission line (not shown).

Fig. 5C shows another embodiment of the system-on-a-wafer 113 according to the present invention. FIG. 5C is similar to FIG. 5B, except that the controller 513 detects the voltage level of the video pin of the transmission interfaces 111 and 112 to determine whether the transmission interfaces 111 and 112 receive the video signal. Taking the transmission interface 111 as an example, when the voltage level of the image pin of the transmission interface 111 is not equal to an initial value, it indicates that the transmission interface 111 has received the image signal IMG 1. Accordingly, the controller 513 commands the switching module 521 to turn on the image path PA1 through the control signal SC 1. At this time, the switching module 521 may not turn on the image path PA 2. In other embodiments, if the transmission interfaces 111 and 112 receive the image signals IMG1 and IMG2, respectively, the controller 513 may command the switch module 521 to turn on the image paths PA1 and PA2 via the control signal SC 1.

In other examples, when the controller 513 knows that the transmission interface 111 has received the image signal IMG1, the controller 513 triggers the controller 514, so that the controller 514 commands the switch module 522 to turn on the data path PA3 through the control signal SC 2. Similarly, when the controller 513 knows that the transmission interface 112 has received the image signal IMG2, the controller 513 triggers the controller 514, so that the controller 514 commands the switch module 522 to turn on the data path PA4 through the control signal SC 2. In some embodiments, when the controller 513 knows that the transmission interfaces 111 and 112 receive the image signals IMG1 and IMG2, respectively, the controller 513 may request the controller 514 to turn on the data path PA3 or PA4 according to a predetermined value. In this embodiment, the controller 514 provides the selection information FS1 and FS2 of the

electronic devices

120 and 130 to the controller 513. The controller 513 modifies the video signal SI according to the selection information FS1 or FS 2.

Fig. 5D shows another embodiment of the system-on-chip 113 according to the present invention. Fig. 5D is similar to fig. 5C, except that the switch module 523 is coupled between the controller 514 and a Hub (Hub) 530. The hub 530 has an upstream port (UFP)531 and downstream ports (DFP) 532-534. The upstream port 531 is coupled to the switch module 523. The downstream ports 532-534 are coupled to the peripheral interfaces 114-116, respectively. The switch module 523 provides data paths PA5 and PA 6. The data path PA5 is coupled between the transmission interface 111 and the upstream port 531. The data path PA6 is coupled between the transmission interface 112 and the upstream port 531.

When the electronic device 120 is coupled to the transmission interface 111, the controller 513 triggers the controller 514. The controller 514 requests the switch module 523 to turn on the data path PA5 via the control signal SC 2. At this time, the switching module 523 does not turn on the data path PA 6. Therefore, the electronic device 120 receives input information from the peripheral interfaces 114-116 or provides output information to at least one of the peripheral interfaces 114-116 through the data path PA 5.

Unless otherwise defined, all terms (including technical and scientific terms) used herein are to be interpreted as commonly understood by one of ordinary skill in the art to which this invention belongs. Moreover, unless expressly stated otherwise, the definition of a term in a general dictionary shall be construed as being consistent with its meaning in the context of the relevant art and shall not be construed as an idealized or overly formal definition.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A display switchable between image sources, comprising:

a first transmission interface, for coupling with a first electronic device, and receiving a first image signal and a selection message from the first electronic device;

a second transmission interface, coupled to a second electronic device, for receiving a second image signal from the second electronic device;

a system-on-chip for selecting at least one of the first and second image signals according to the selection information to generate a video signal; and

a display panel, which presents a picture according to the video signal.

2. The switchable image source display of claim 1, wherein the first electronic device has a touch screen, and the first electronic device generates the selection information according to a track pattern on the touch screen.

3. The switchable image source display of claim 2, further comprising:

a peripheral interface for coupling with a peripheral device,

when the selection information accords with a second preset condition, the system single chip takes the second image signal as the video signal and conducts a second data path between the peripheral interface and the second transmission interface.

4. The switchable image source display of claim 3, wherein the SCM adjusts brightness of the display panel when the selection information satisfies a third predetermined condition.

5. The switchable image source display of claim 2, wherein the frame is synchronized with a frame presented by the touch screen when the first electronic device provides the selection information.

6. The switchable image source display of claim 1, wherein the system-on-a-chip comprises:

a control circuit, which generates a control signal according to the voltage potentials of the first and second transmission interfaces; and

a switch circuit coupled to the first and second transmission interfaces for receiving the first and second image signals and outputting at least one of the first and second image signals to the control circuit according to the control signal, so that the control circuit generates the video signal according to at least one of the first and second image signals.

7. The switchable image source display of claim 6, further comprising:

a first peripheral interface for coupling to a first peripheral device and receiving a first input from the first peripheral device,

wherein, when the switch circuit provides the first image signal to the control circuit, the switch circuit provides the first input information to the first electronic device,

when the switch circuit provides the second image signal to the control circuit, the switch circuit provides the first input information to the second electronic device.

8. The switchable image source display of claim 7, further comprising:

a second peripheral interface for coupling with a second peripheral device,

when the switch circuit provides the first image signal to the control circuit and the first electronic device provides an output message to the first transmission interface, the switch circuit provides the output message to the second peripheral interface.

9. The switchable image source display of claim 8, further comprising:

the hub is provided with an uplink port, a first downlink port and a second downlink port, wherein the uplink port is coupled with the switch circuit, the first downlink port is coupled with the first peripheral interface, and the second downlink port is coupled with the second peripheral interface.

10. The switchable image source display of claim 1, wherein at least one of the first and second transmission interfaces is a universal serial bus Type C (USB Type C) connection port.

11. The switchable video source display of claim 1, wherein the first transmission interface comprises a first video transmission port for receiving the first video signal, and the second transmission interface comprises a second video transmission port for receiving the second video signal, the first video transmission port being of a same type or a different type than the second video transmission port.

12. The switchable image source display of claim 1, wherein the selection information is integrated into the first or second image signal.

13. The switchable image source display of claim 1, wherein the system-on-chip takes the first image signal as the video signal when the first transmission interface is coupled to the first electronic device and the second transmission interface is not coupled to the second electronic device, and the system-on-chip takes the second image signal as the video signal when the first transmission interface is not coupled to the first electronic device and the second transmission interface is coupled to the second electronic device.

14. The display of claim 1, wherein the system-on-chip takes the first or second video signal as the video signal according to a predetermined value when the first and second transmission interfaces are coupled to the first and second electronic devices, respectively, and the first electronic device does not send the selection information.

15. The display of claim 1, wherein when the first and second transmission interfaces are coupled to the first and second electronic devices respectively and the first electronic device does not send the selection information, the system-on-chip integrates the first and second image signals to generate a third image, and the display panel displays a PIP image according to the third image.

16. An operating system, comprising:

a first electronic device for providing a first image signal and a selection message;

a second electronic device for providing a second image signal; and

a display, comprising:

a first transmission interface, coupled to the first electronic device, for receiving the first image signal and the selection information;

a second transmission interface, coupled to the second electronic device, for receiving the second image signal;

a display panel, which presents a picture according to the video signal.

17. The operating system of claim 16, wherein the first electronic device has a touch screen, and the first electronic device generates the selection information according to a track pattern on the touch screen.

18. The operating system of claim 17, further comprising:

a peripheral interface for coupling with a peripheral device,

19. The operating system of claim 16, wherein the frame is synchronized with a frame presented by the touch screen when the first electronic device provides the selection information.

20. The operating system of claim 16, wherein the first electronic device integrates the selection information into the first image signal.