KR100850964B1 - Display system including a display device and one or more devices to be connected the display device, and method for controlling the display system - Google Patents

Abstract

A display device, a display system including one or more electronic devices connected to the display device, and its control method are provided to provide information about a state of an electronic device and supplementary information to a user even when communication between a display device and the electronic device is not activated. A display device(10) receives information about a state of an electronic device(20) from the electronic device and provides it to a user, even when communication between the display device and the electronic device is not activated. While the display device is displaying an image received from a different electronic device(30), communication between the display device and the electronic device is deactivated. The electronic device automatically generates information indicating its state even when communication between the electronic device and the display device is not activated, and transmits it to the display device via a CEC(Consumer Electronics Control) channel of an HDMI(High Definition Multimedia Interface).

Description

Display system including a display device and one or more devices to be connected the display device, and Method for controlling the display system}

The present invention relates to a display system including a plurality of devices and a display device connected thereto, and a control method of the system.

Recently, display devices such as TVs and monitors are not limited to displaying broadcast images, but are connected to various electronic devices that provide image data and output data provided by the electronic devices. For example, the display device outputs video and audio transmitted from a DVD player, a set-top box (STB), a recording device, and a game device. An interface is required for smooth data communication between the display device and the electronic device, and HDMI (High Definition Multimedia Interface) is one such interface.

In general, HDMI is a digital interface that combines existing RGB, Y, Cb / Cr channels and audio channels into one channel, and can transmit high-definition video signals and multi-channel audio signals with a bandwidth of more than 5 Gbps. .

However, despite the use of such a digital interface, there is no way for the user to check the state of the electronic device through the display device when the communication between the electronic device and the display device is not activated. For example, when an image transmitted from a game device in which communication with the display device is activated is displayed, the display device cannot determine or display the state of the recording device. Therefore, it is difficult for the user to check the state change such as whether the recording apparatus has started the reservation recording or the reservation recording.

The present invention has been made in view of the above-mentioned disadvantages of the related arts, and an object of the present invention is to provide a display system capable of informing a user of a state of an electronic device that is not activated, as well as an activated electronic device. It is to provide a control method.

In order to achieve the above object, the display system control method of the present invention comprises the steps of generating state information for the electronic device in response to the state change of the electronic device; Transmitting the generated state information to a display device through a specific channel of a data bus including a plurality of channels; And displaying the state of the electronic device on the display device based on the transmitted state information.

Here, the state information on the electronic device, information on the function currently started / terminated in the electronic device, information on the type / type of the electronic device, and the operation history (operation history) of the electronic device At least one of the information.

In addition, in the step of transmitting the generated state information to the display apparatus through a specific channel, the state information is transmitted through a CEC (Consumer Electronics Control) channel of HDMI (High Definition Multimedia Interface).

According to an aspect of the present invention, there is provided a display system comprising: an electronic device configured to generate state information in response to a change of a state of a function / operation, and to transmit the generated state information through a specific channel of a data bus including a plurality of channels; And a display device for displaying the state of the electronic device based on the transmitted state information.

According to another aspect of the present invention, there is provided a method of controlling a display system, the method comprising: periodically generating state information about an electronic device and periodically transmitting the state information to the display device; Determining a state change of the electronic device based on the periodically transmitted state information; And displaying the state of the electronic device on the display device according to the determination result.

In the determining of the state change of the electronic device based on the state information, the state change of the electronic device is determined by comparing the transmitted state information with previously transmitted state information. In particular, the state change of the electronic device is determined by comparing the image data included in the transmitted state information with the image data included in the previously transmitted state information.

According to another aspect of the present invention, there is provided a display system comprising: an electronic device for periodically generating and transmitting state information indicating a function / operation state; And a display device configured to determine a state change of the electronic device based on the state information periodically transmitted and to display the state of the electronic device on the display device according to the determination result.

The present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art as can be seen from the appended claims, and such modifications are within the scope of the present invention. Reveal.

The present invention can display the state of the electronic device connected to the display device on the screen of the display device. In particular, even when communication between the display device and the electronic device is not activated, the user may be provided with information and additional information regarding the state of the electronic device.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail. In the following description, the same components are given the same names and the same reference numerals for convenience of description.

In addition, the terminology used in the present invention was selected as a general term that is widely used at present, but in some cases, the term is arbitrarily selected by the applicant, and in this case, since the meaning is described in detail in the corresponding part of the present invention, a simple term is used. It is to be understood that the present invention is to be understood as a meaning of terms rather than names.

1 shows an example of a display system according to the present invention. As shown in FIG. 1, the display system of the present invention is connected to a display apparatus 10 capable of playing / outputting an image and the display apparatus 10 through a data bus, in particular, a high definition multimedia interface (HDMI). At least one or more electronic devices 20, 30.

The display device 10 is a device capable of displaying an image, such as a TV, a monitor, and the like, and provides information on a state of the electronic device 20 in which communication with the display device is not activated. Can be received from the user and provided to the user. Here, the electronic device 20 in which communication is not activated refers to a state in which data transmission and reception do not occur. For example, while the display apparatus 10 displays an image received from another electronic device 30, communication with the electronic device 20 is deactivated.

The electronic device 20 is not limited to a device that provides image data, such as a CD player, a DVD player, a set-top box, a game device, a camera, a camcorder, a personal video recorder (PVR), a PC, a notebook computer, and the like. It may be defined as a device that can be connected to the display device 10 through an interface such as HDMI. The electronic device 20 automatically generates information indicating its own state even when communication with the display apparatus 10 is not activated, and the electronic apparatus 20 generates the information through the CEC (Consumer Electronics Control) channel of the HDMI. 10) to transmit. Then, the display apparatus 10 causes the user to provide the transmitted state information. Here, the status information may include information indicating a function / operation currently started or finished, as well as information indicating a malfunction of the electronic device 20 and an operation history of the electronic device 20, and the like. The electronic device 20 may further include information indicating the type / type of the electronic device 20.

2 illustrates the display apparatus 10 and the electronic device 20 of FIG. 1 in detail. Since the configuration of the display device 10 and the electronic device 20 shown in FIG. 2 shows only essential components necessary to explain the gist of the present invention, it is obvious that other components can be added. It is also possible to change the configuration without departing from the gist. As shown in FIG. 2, the HDMI consists of three independent communication channels, such as Transition Minimized Differential Signaling (TMDS), Display Data Channel (DDC), and Consumer Electronics Control (CEC). A signal, information on the display apparatus 10, a command for controlling the display apparatus 10, and status information of the electronic device 20 may be transmitted and received.

The TMDS channel is a channel mainly responsible for transmitting and receiving video signals and audio signals, and specifically includes one or more TMDS data channels and one TMDS clock channel. The TMDS data channel is a channel for transmitting video and audio signals from the data transmitter 25 of the electronic device 20 to the data receiver 15 of the display apparatus 10. The TMDS clock channel is used to transmit a reference clock (synchronization signal) necessary for the reception and decoding of a video signal received by the data receiver 15 from the data transmitter 25 to the data receiver 15.

The DDC channel is a data communication standard between an electronic device and a monitor defined by an international standards organization, Video Electronics Standards Association (VESA), and relates to configuration and / or capabilities of the display device 10 during system booting. Used to read information. That is, the electronic device 20 reads E-EDID (Enhanced Extended Display Identification Data) stored in the memory 11 of the display device 10 through the DDC channel. The control unit 23 of the electronic device 20 may generate and transmit an optimal video signal and an audio signal to the display apparatus 10 with reference to the read E-EDID (not shown). And the data transmitter 25. In addition, the DDC channel is used to assign a physical address of the display device 10 and the electronic device 20. When the physical address of the display apparatus 10 is generated first in the HDMI environment, the E-EDID includes the physical address of the electronic device according to the port number of the display apparatus 10. Accordingly, the electronic devices 20 and 30 may check their physical addresses through the E-EDID read through the DDC channel. For example, if the physical address of the display device 10 is 0.0.0.0, the physical address of the electronic device 20 connected to the first port is 1.0.0.0 and the electronic device 30 connected to the second port is 1.0.0.0. The physical address of is assigned 2.0.0.0.

The CEC channel is a channel suitable for transmitting and receiving additional data having a small size compared to other channels at a low transmission rate, and is a channel for transmitting and receiving control commands for controlling the operation of the electronic device. In particular, the CEC channel is used as a channel for transmitting status information of the electronic device 20. That is, the electronic device 20 transmits the state information to the display device 10 through the CEC channel.

3 shows an example of the state information. As shown in FIG. 3, the state information is configured in the form of a Vander Specific Command defined in the CEC protocol, and includes a header block and a data block. Here, the vendor specific command is a command including a specific code arbitrarily defined so that a product producer can apply to a device between a company or an affiliated company, and enables a promised communication between an electronic device and a display device.

The header block is a "starting address" which is a logical address of the electronic device 20, a "target address" which is a logical address of the display device 10, an "operation code" indicating that status information is transmitted, and a corresponding "ACK" (Acknowledge) indicating whether the block is a header block or a data block, and "EOM" (End of Massage) indicating whether the block is the last block. Here, the logical addresses of the electronic device 20 and the display device 10 are allocated according to the function / type of the device / device, unlike the physical addresses assigned to each device / device one by one. Multiple logical addresses may be assigned to. 4 is a table showing an example of logical addresses allocated according to function / type. Referring to FIG. 4, logical addresses “1” and “4” may be assigned to a device capable of recording and reproducing.

The data block is a "start address" which is a logical address of the electronic device 20, a "target address" that is a logical address of the display device 10, and a state for indicating the state of the electronic device 20. Image data, "ACK" (Acknowledge) indicating whether the block is a header block or a data block, and "EOM" (End of Massage) indicating whether the block is the last block. In addition, the 'reserved 1' area of the data block may further include other types of data indicating the state of the electronic device 20, for example, text or voice data. The 'reserved 2' area of the data block may further include driving history information regarding the function / operation of the electronic device 20 and the manufacturer / model name of the electronic device 20 previously performed.

Referring to the driving method of the display system according to an embodiment of the present invention.

First Example

5 is a diagram for describing a method of driving a display system according to a first embodiment. As shown in FIG. 5, first, the controller 23 of the electronic device 20 determines whether a change occurs in function / operation (S51). Here, the controller 23 may determine the change of state not only during the communication with the display apparatus 10 but also during the deactivation, and may additionally determine an error or a functional failure.

If it is determined that a change in function / operation of the electronic device 20 has occurred, the controller 23 generates state information of the form shown in FIG. 3 (S52). At this time, the controller 23 generates a start address, a destination address, and an operation code. In addition, the controller 23 extracts image data indicating a changed function / operation from the memory 21 and includes the image data in the state information. For example, when the reservation recording function is completed in the electronic device 20, image data indicating that the reservation recording function is completed is included in the state information. In order to minimize the capacity of the image data, the image data is the following bitmap data, but other types of image data may be used.

0x03, 0xE0, 0x0C, 0x98,

0x10, 0x84, 0x20, 0x82,

0x27, 0xF2, 0x47, 0xF1,

0x47, 0xF1, 0x47, 0xFF,

0x47, 0xF1, 0x47, 0xF1,

0x27, 0xF2, 0x20, 0x02,

0x10, 0x04, 0x0C, 0x18,

0x03, 0xE0, ...

When the state information as shown in FIG. 3 is generated, the state information is encoded by a signal processor (not shown) into a signal that can be transmitted through a CEC channel, and then the controller 23 controls the state information of the state information through a CEC channel. The header block and the data block are sequentially transmitted to the display apparatus 10 (S53).

The display apparatus 10 receives the state information and reads image data included in the state information. The display apparatus 10 converts the image data into a displayable image and then displays it on the screen (S54).

6 illustrates an example of an image displayed on a screen of the display device 10. The image of FIG. 6 indicates that the recording function is terminated and may be displayed in a predetermined area of the screen or in the form of an OSD (on screen display) as shown in FIG. 1. Even if a broadcast image or an image of another electronic device 30 is displayed on the screen of the display device 10, the image is displayed on the image.

In addition, additional text or audio data indicating that the recording function is terminated, information on driving history and manufacturer / model name of the electronic device 20, and a port number connected to the electronic device 20 may be further displayed. have. The display of such additional information may be set by changing a menu of the display apparatus 10.

As described above, in the first embodiment, the electronic device 20 detects a change in its own state, and generates and transmits state information according to the change of state. Therefore, the display apparatus 10 may notify the user of the state of the electronic device 20 even while outputting an image of the other electronic device 30.

2nd Example

7 is a flowchart for explaining a method of driving a display system according to a second embodiment. The method according to the second embodiment is characterized in that the state information is periodically generated and transmitted, and the display device 10 determines whether to display the state of the electronic device 20 based on the state information. The specific method of the second embodiment is as follows.

First, the controller 23 periodically checks the current state of the electronic device 20 (S71). For example, the controller 23 periodically determines a function / operation currently in progress or a function / operation that is currently completed every few seconds or periodically in response to a reference clock generated inside the electronic device 20. Judging by. Here, the reference clock is a synchronization signal used to generate or transmit a video signal.

In addition, whenever the current state of the electronic device 20 is confirmed, the controller 23 generates state information reflecting the current state of the electronic device 20 (S72). That is, the controller 23 periodically generates state information reflecting the current state of the electronic device 20. At this time, the image data included in the state information indicates the current state of the electronic device 20. For example, if scheduled recording is in progress, the image data indicates that scheduled recording is in progress.

When the state information is generated, the controller 23 sequentially transmits the header block and the data block of the state information to the display apparatus 10 through the CEC channel (S73). As the state information is generated periodically, the state information is also periodically transmitted, and the time required to check the state of the electronic device 20 to transmit the state information is very short. For example, these processes can be done within one period of the reference clock.

The display apparatus 10 receives the status information and displays the status information on the screen according to a set method. The method of displaying the image data may be performed by any one of the following examples by user's setting.

Example 1. The control unit 13 of the display apparatus 10 reads image data included in the state information that is periodically received. The controller 13 compares the image data included in the previously received state information with the image data included in the currently received state information. If the two image data are different from each other, the controller 13 displays the currently received image data on the screen. That is, the display device 10 determines whether there is a state change of the electronic device 20 based on the state information (S74), and indicates the state of the electronic device 20 only when there is a state change. The image is displayed on the screen (S75).

Example 2. The display apparatus 10 reads image data from periodically received state information and displays the image on the screen as it is (periodically) every time it is received. In this case, the display of the image may last for several seconds or until immediately before the next state information is received. According to this method, the display apparatus 10 displays the image on the screen whenever the image data included in the state information is received without determining the state change of the electronic device 20. Therefore, the user may check the state of the electronic device 20 in real time while the display device 10 outputs an image of another electronic device 30.

Similar to the first embodiment, the image data is displayed on a certain area of the screen or in the form of an OSD (On Screen Display), and the broadcast image or the image of another electronic device 30 is displayed on the screen of the display device 10. The image is superimposed on the image even if it is being displayed.

In addition, text or audio data indicating that the recording function is terminated, information on driving history of the electronic device 20, information on a manufacturer / model name, a port number connected to the electronic device 20, and the like are included in the image data. Can be displayed together. The display of such additional information may be set by changing a menu of the display apparatus 10.

As described above, in the second embodiment, the state change of the electronic device 20 may be determined based on the state information transmitted by the display apparatus 10, and the user may be notified of the state change. In addition, the display apparatus 10 may notify the user of the current state of the electronic device 20 in real time by displaying image data of the state information periodically transmitted as it is on the screen.

It is apparent that the present invention is applicable not only when communication between the display apparatus 10 and the electronic device 20 is activated but also when activated.

1 is a view showing an example of a display system according to the present invention;

2 is a view showing the configuration of the display device and the electronic device of FIG.

3 is a view showing an example of state information according to the present invention;

4 illustrates an example of a logical address table according to the present invention;

5 is a flowchart illustrating a display system control method according to a first embodiment of the present invention;

6 is a diagram illustrating an example of image data displayed on a display device;

7 is a flowchart illustrating a display system control method according to a second embodiment of the present invention.

Claims (18)

A method of controlling a display system comprising one or more electronic devices connected to a display device, the method comprising: Generating state information about the electronic device in response to a change in the state of the electronic device; Transmitting the status information to the display device through a Consumer Electronics Control (CEC) channel of a high definition multimedia interface (HDMI); And displaying the state of the electronic device on the display device based on the transmitted state information. The method of claim 1, Status information for the electronic device, And at least one of information on a function currently started / ended in the electronic device, information on the type / type of the electronic device, and information on operation history of the electronic device. Display system control method. The method of claim 2, Information on the current start / end function, And at least one of an image, a text, and a voice representing a function currently started or finished. delete The method of claim 1, Displaying the state of the electronic device on the display device based on the transmitted state information; And the display device displays a state of the electronic device on an image transmitted from another electronic device. An electronic device configured to generate status information in response to a change in function / operation, and to transmit the status information through a Consumer Electronics Control (CEC) channel of a high definition multimedia interface (HDMI); And a display device for displaying a state of the electronic device based on the transmitted state information. The method of claim 6, The state information, And at least one of information on a function currently started / ended in the electronic device, information on the type / type of the electronic device, and information on operation history of the electronic device. Display system. delete The method of claim 6, The display device, And a display state of the electronic device on an image transmitted from another electronic device. A method of controlling a display system comprising a display device and at least one electronic device connected to the display device. Periodically generating state information about the electronic device and periodically transmitting the state information to the display device; Determining a state change of the electronic device by comparing the image data included in the transmitted state information with the image data included in the previously transmitted state information; And displaying the state of the electronic device on the display device according to the determination result. The method of claim 10, The state information, A display including at least one of information on a function currently in progress or completed in the electronic device, information on the type / type of the electronic device, and information on operation history of the electronic device; Control method of the system. The method of claim 10, Periodically transmitting the status information to the display device, And transmitting the status information through a CEC (Consumer Electronics Control) channel of a high definition multimedia interface (HDMI). delete The method of claim 10, In the step of periodically generating and transmitting the status information, And generating and transmitting the state information periodically in response to a reference clock generated inside the electronic device. An electronic device for periodically generating and transmitting state information indicating a function / operation state; A display device for determining a change in the state of the electronic device by comparing the image data included in the transmitted state information with the image data included in the previously transmitted state information, and displays the state of the electronic device according to the determination result Display system comprising a. The method of claim 15, The electronic device, And periodically generating and transmitting the status information in response to a reference clock generated therein. delete The method of claim 15, The electronic device, And display the status information through a CEC (Consumer Electronics Control) channel of a high definition multimedia interface (HDMI).

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