Interactive display device and method

1 . An interactive display device, comprising:

an image sensor, configured to generate a first image signal;

an interface circuit, coupled to an electronic device and configured to transmit a second image signal from the electronic device; and

a display, coupled to the image sensor and the interface circuit and configured to:

set an operation status of the interface circuit according to a user presence signal and the second image signal; and

based on the operation status, display an output image according to at least one of the first image signal and the second image signal.

2 . The interactive display device according to claim 1 , wherein the display comprises:

a panel, configured to display the output image; and

a scaler, coupled to the panel, the image sensor, and the interface circuit and configured to determine whether the interface circuit is connected to the electronic device to set the operation status based on the user presence signal and the second image signal.

3 . The interactive display device according to claim 2 , further comprising:

an image converter, coupled to the scaler and configured to transmit the first image signal to the scaler according to a plurality of image formats; and

a splitter, coupled to the interface circuit, the image sensor, and the image converter and configured to distribute the first image signal to the interface circuit and the image converter.

4 . The interactive display device according to claim 3 , wherein the interface circuit comprises:

at least one input interface, configured to generate a user input signal;

a hub interface, coupled to the at least one input interface and the electronic device, and configured to transmit the user input signal and the second image signal; and

a bridge controller, coupled to the hub interface, the scaler, and the splitter, wherein the scaler is configured to set the operation status by enabling or disabling the bridge controller to prohibit or allow the electronic device to access the image sensor.

5 . The interactive display device according to claim 1 , further comprising:

a presence sensor, coupled to the display and configured to generate the user presence signal.

6 . The interactive display device according to claim 1 , wherein the display is further configured to:

when the interface circuit is not connected to the electronic device, execute a mirror mode; and

in the mirror mode, detect whether a user is present through a presence sensor within a period of time to determine whether to switch the mirror mode to a sleep mode based on the user presence signal.

7 . The interactive display device according to claim 6 , wherein the display is further configured to:

when the interface circuit is connected to the electronic device, detect an absence of the second image signal to execute the mirror mode; and

when the interface circuit is connected to the electronic device, detect a presence of the second image signal to execute a normal display mode or a hybrid mode according to whether a multi-window mode is enabled or not.

8 . The interactive display device according to claim 7 , wherein the display is further configured to:

in the normal display mode, detect whether the user is present through the presence sensor to determine whether to switch the normal display mode to the mirror mode according to the user presence signal.

9 . The interactive display device according to claim 7 , wherein the display is further configured to:

in the mirror mode, set the operation status by disabling a bridge controller of the interface circuit to prohibit the electronic device from accessing the image sensor;

in the normal display mode, set the operation status by enabling the bridge controller to allow the electronic device to access the image sensor; and

in the hybrid mode, execute the multi-window mode.

10 . The interactive display device according to claim 9 , wherein when the display executes the multi-window mode, the display is further configured to:

request the image sensor to capture a captured signal corresponding to one half of the first image signal; and

set the operation status by disabling the bridge controller to prohibit the electronic device from accessing the image sensor.

11 . The interactive display device according to claim 10 , wherein when the display executes the multi-window mode, the display is further configured to:

compare difference information between the first image signal and the captured signal;

according to the difference information, enable the bridge controller to update the operation status; and

according to the difference information, request the bridge controller to update a frame descriptor to allow the electronic device to execute a program corresponding to the multi-window mode according to the frame descriptor.

12 . The interactive display device according to claim 6 , wherein the image sensor is externally connected to the display,

wherein in the mirror mode, the display is further configured to perform mirror inversion on the first image signal to generate an inverted image signal and display the output image according to the inverted image signal.

13 . An interactive display method, comprising:

generating a first image signal by an image sensor;

transmitting a second image signal from an electronic device by an interface circuit;

setting an operation status of the interface circuit by a display according to a user presence signal and the second image signal; and

based on the operation status, displaying an output image by the display according to at least one of the first image signal and the second image signal.

14 . The interactive display method according to claim 13 , further comprising:

executing a mirror mode by the display when the interface circuit is not connected to the electronic device; and

in the mirror mode, detecting whether a user is present through a presence sensor by the display within a period of time to determine whether to switch the mirror mode to a sleep mode based on the user presence signal.

15 . The interactive display method according to claim 14 , further comprising:

when the interface circuit is connected to the electronic device, detecting an absence of the second image signal by the display to execute the mirror mode; and

when the interface circuit is connected to the electronic device, detecting a presence of the second image signal by the display to execute a normal display mode or a hybrid mode according to whether a multi-window mode is enabled or not.

16 . The interactive display method according to claim 15 , further comprising:

in the normal display mode, detecting whether the user is present through the presence sensor by the display to determine whether to switch the normal display mode to the mirror mode according to the user presence signal.

17 . The interactive display method according to claim 16 , further comprising:

in the mirror mode, setting the operation status by the display through disabling a bridge controller of the interface circuit to prohibit the electronic device from accessing the image sensor;

in the normal display mode, setting the operation status by the display through enabling the bridge controller to allow the electronic device to access the image sensor; and

in the hybrid mode, executing the multi-window mode by the display.

18 . The interactive display method according to claim 17 , wherein the step of executing the multi-window mode by the display in the hybrid mode comprises:

requesting the image sensor by the display to capture a captured signal corresponding to one half of the first image signal; and

setting the operation status by the display through disabling the bridge controller to prohibit the electronic device from accessing the image sensor.

19 . The interactive display method according to claim 18 , wherein the step of executing the multi-window mode by the display in the hybrid mode further comprises:

comparing difference information between the first image signal and the captured signal by the display;

according to the difference information, enabling the bridge controller by the display to update the operation status; and

according to the difference information, requesting the bridge controller by the display to update a frame descriptor, so that the electronic device executes a program corresponding to the multi-window mode according to the frame descriptor.

20 . The interactive display method according to claim 16 , further comprising:

in the mirror mode, performing mirror inversion on the first image signal by the display to generate an inverted image signal; and

in the mirror mode, displaying the output image by the display according to the inverted image signal, wherein the image sensor is externally connected to the display.