JP2010004289A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of improving accuracy of OSD display of a model name when an external device at a power saving state is connected after once storing model name information of an external device at a normal operation state and information regarding other external devices. <P>SOLUTION: Manufacturer name information and the model name information are notified from a video camera 200 at a power on state to a television receiver 100, after the pieces of information are stored in an NVRAM of the television receiver 100, there is notification about the manufacturer name information to an inquiry of a connection state from a device at a power off state to the television receiver 100, when the notified manufacturer name information matches the manufacturer name information stored in the NVRAM, the OSD display of the model name is performed based on the model name information stored in the NVRAM, and when the pieces of manufacturer name information do not match, the OSD display of the model name is not performed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device.

  In recent years, an increasing number of television receivers have a high definition multimedia interface (HDMI) terminal in addition to a video input terminal, a broadcast tuner, and the like. The HDMI interface is a digital interface for digital AV equipment, and can transfer video and audio data at a high speed with a single cable. In addition, not only television receivers but also digital AV devices such as DVD recorders are generally equipped with an HDMI interface.

  On the other hand, the HDMI standard defines a CEC (Consumer Electronics Control) function that enables control of both HDMI connected devices as well as the AV output standard. Many devices that support the CEC function have already been released. In the CEC function, bidirectional command communication is possible between devices connected by HDMI, so that one-to-one and one-to-multiple device control is possible.

  Various functions are defined in the CEC function. For example, the One Touch Play function is a function for performing an operation of automatically starting a television receiver and selecting a connected HDMI input of a DVD recorder or the like when a Play button of a DVD recorder or the like is pressed. There are many other functions defined in the standard, but it is up to the manufacturer to decide which functions to implement in the product.

When connecting a TV receiver having a CEC function and an HDMI device (device having an HDMI terminal), the HDMI device notifies the TV receiver of the manufacturer name and model name as device information when the power is turned on using standard commands of the CEC standard. The television receiver generally stores the notified device information in a RAM (volatile memory) or NVRAM (nonvolatile memory), and displays the model name on a menu or the like on an OSD (On Screen Display). As a related technique, Patent Document 1 discloses a display device that displays connection states of a plurality of devices.
JP 2005-354433 A

  If the HDMI device is an HDD recorder or the like, the connection and installation location will hardly change after installation, so the conventional television receiver should always display the model name in OSD based on the model name held in NVRAM. .

  However, in the case of an HDMI device that is not always connected, such as a video camera, frequent reconnection occurs. Since the model name is not notified to the television receiver just by switching to another device in the power-off state, a problem that the model name of the device connected last time is OSD displayed on the television receiver has occurred. Therefore, in order to correctly display the OSD model name on the television receiver, there is a problem that the user must turn on the power of the HDMI device every time it is connected.

  In addition, even if the connection is canceled by disconnecting the HDMI cable from the TV receiver or taking out the HDMI device from the power supply cradle, the model name of the device connected last time is still displayed on the TV receiver. there were.

  In view of the above problems, the present invention temporarily stores the model name information of the external device in the normal operation state and information on other external devices, and then stores the OSD of the model name when the external device in the power saving state is connected. It is an object of the present invention to provide a display device capable of improving display accuracy.

In order to achieve the above object, a display device of the present invention includes a display unit, a storage unit,
A storage unit that stores in the storage unit the model name information notified from the external device that is in a normal operation state and information on at least one other external device;
Information related to at least one external device other than the model name information notified from the external device in the power saving state in response to the connection status inquiry, and information related to the external device stored in the storage unit by the storage unit; And an OSD unit for switching whether to display the model name on the display unit based on the model name information stored in the storage unit by the storage unit according to whether or not they match. .

  According to such a configuration, once the model name information of the external device in the normal operation state and other information related to the external device are stored in the storage unit, the external device in the power saving state that is the same as the external device is then stored. Even if a device is connected, the model name of the external device is displayed in OSD on the display unit even if the normal operation state is not set, and correct OSD display is obtained. Also, once the model name information of the external device in the normal operation state and other information related to the external device are stored in the storage unit, when an external device in a power saving state different from that external device is connected thereafter Even if the normal operation state is not set, the model name of the external device connected last time is not displayed on the display unit, so that erroneous display can be prevented.

  In the above configuration of the display device of the present invention, the OSD unit may not display the model name on the display unit in an OSD display when there is no notification of the connection status inquiry.

  According to such a configuration, even if no external device is connected, the model name is not displayed in the OSD, and erroneous display can be prevented.

  Further, in the display device according to the present invention, in the configuration described above, the information regarding the at least one other external device and the information regarding the at least one external device other than the model name information are at least one of manufacturer name information and a logical address. You may make it. In particular, it is desirable to use both the manufacturer name information and the logical address in terms of improving display accuracy.

  In the display device according to the present invention, the notification from the external device in the normal operation state and the notification from the external device in the power saving state use a CEC command of the HDMI standard. May be.

  According to the display device of the present invention, after the model name information of the external device in the normal operation state and other information related to the external device are temporarily stored, the OSD display of the model name when the external device in the power saving state is connected. Accuracy can be improved.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a state in which a television receiver and a video camera according to the present invention are HDMI-connected. The HDMI terminal of the television receiver 100 according to the present invention and the HDMI terminal of the power supply cradle 300 are connected by the HDMI cable 400, and the video camera 200 is placed on the power supply cradle 300. A video / audio signal reproduced by the video camera 200 is input to the television receiver 100 via the power supply cradle 300 and the HDMI cable 400. Further, the TV 100 and the video camera 200 can transmit a CEC command bidirectionally via the power supply cradle 300 and the HDMI cable 400.

  FIG. 2 shows a schematic configuration diagram of a television receiver according to the present invention. The television receiver 100 according to the present invention includes a tuner 2, an MPEG decoder 3, a video processing circuit 4, an OSD / scaler 5, a display 6, a video input terminal 7, an HDMI terminal 8, and an HDMI receiver 9. , A remote control receiver 10, a power supply microcomputer 11, a main CPU 12, and an NVRAM 13.

  The antenna 1 is disposed outdoors, receives a digital broadcast wave, and outputs a high-frequency digital modulation signal to the tuner 2.

  The tuner 2 extracts a signal having a specific frequency from the high frequency digital modulation signal. Further, the tuner 2 demodulates the selected digital modulation signal, extracts a transport stream, separates the video stream from the transport stream, and outputs the video stream to the MPEG decoder 3.

  The MPEG decoder 3 decodes the video stream and outputs the decoded video / audio information to the video processing circuit 4.

  The video input terminal 7 is, for example, an S terminal or a D terminal, and video information input to the video input terminal 7 from an external device via a cable is output to the video processing circuit 4.

  Further, the television receiver 100 includes three HDMI terminals 8 (only one is shown for convenience in FIG. 2), and an HDMI cable can be connected to the HDMI terminal 8. The video / audio information input from the external device to the HDMI terminal 8 via the HDMI cable is received by the HDMI receiver 9. The HDMI receiver 9 separates the received video / audio information into video information and audio information, decodes the video information, and outputs it to the video processing circuit 4.

  The video processing circuit 4 performs digital video processing on video information input from the MPEG decoder 3, the video input terminal 7, and the HDMI receiver 9. The OSD / scaler 5 is a circuit that generates a video signal based on character information and color information instructed from the main CPU 12 and performs a process of reducing broadcast received video. The OSD / scaler 5 can perform EPG (Electronic Program Guide) display, data broadcast display, menu screen display, and the like based on program information. The display 6 displays video based on the video signal input from the OSD / scaler 5.

  The remote control receiving unit 10 receives a remote control signal from a remote control transmitter (not shown), converts it into a command signal, and gives it to the power supply microcomputer 11.

  The power supply microcomputer 11 controls on / off of the power supply, operates while receiving power supply even when the power is off, and performs processing such as monitoring a CEC command from the HDMI terminal 8 and a command signal from the remote control receiving unit 10. The main CPU 12 controls each part and has a specification that allows communication with the power supply microcomputer 11.

  FIG. 3 shows a schematic configuration diagram of the video camera 200. The video camera 200 includes a camera unit 20, a microphone 21, a speaker 22, an image / audio processing unit 23, a control unit 24, an external memory interface 25, an operation unit 26, a display unit 27, and an HDMI input / output unit. 28.

  At the time of moving image shooting, video information shot by the camera unit 20 is compressed by the audio / video processing unit 23 and recorded in the external memory 29 (for example, an SD card memory) via the external memory interface 25. At the time of voice recording, the voice information input from the microphone 21 is compressed by the image / sound processor 23 and recorded in the external memory 29.

  At the time of moving image reproduction, the video information read from the external memory 29 is decompressed by the image / audio processing unit 23, and the moving image is displayed on the display unit 27. At the time of audio reproduction, the audio information read from the external memory 29 is decompressed by the image / audio processing unit 23, and the audio is reproduced from the speaker 22.

  In addition, when video / audio playback is performed in an external device connected to the power supply cradle 300 on which the video camera 200 is placed and the HDMI cable 400, the video / audio information read from the external memory 29 is an image / audio processing unit. 23, and is transmitted from the HDMI input / output unit 28 to the external device via the power supply cradle 300 in the TMDS (Transition Minimized Differential Signaling) format. Further, the control unit 24 performs CEC communication processing with an external device via the HDMI input / output unit 28 and the power supply cradle 300. The operation unit 26 has various buttons for giving instructions to the video camera 200.

  Next, OSD display control according to the present invention will be described with reference to the flowcharts of FIGS.

(Authentication operation (Fig. 4))
It is assumed that the television receiver 100 and the power supply cradle 300 are connected by the HDMI cable 400, and the video camera 200 is mounted on the power supply cradle 300. Then, when a power-on operation is performed at the operation unit 26 of the video camera 200, the control unit 24 turns on the power and puts the video camera 200 into a normal operation state. At this time, the control unit 24 transmits a power-on request that is a CEC command to the television receiver 100 via the HDMI input / output unit 28.

  Then, in step S40, the power supply microcomputer 11 of the television receiver 100 receives a power-on request from the HDMI terminal 8, turns on the power, and puts the television receiver 100 into a normal operation state. Then, the control unit 24 of the video camera 200 transmits manufacturer name information and model name information to the television receiver 100 via the HDMI input / output unit 28 using a CEC command.

  Then, in step S 41, the main CPU 12 of the television receiver 100 receives manufacturer name information and model name information via the HDMI terminal 8 and stores these information in the NVRAM 13.

  In step S42, the main CPU 12 sets a display management flag in association with the manufacturer name and model name information stored in the NVRAM 13 in step S41. This completes the authentication. After that, when the HDMI device selection menu display operation is performed with the remote control transmitter, the main CPU 12 instructs the OSD / scaler 5 based on the model name information stored in the NVRAM 13 because the display management flag is set. The OSD / scaler 5 generates a video signal based on the instruction and outputs it to the display 6, and an HDMI device selection menu as shown in FIG. 6 is displayed on the display 6. Here, the model name is displayed next to the port name that has received the model name information.

(Operation after authentication is completed (Fig. 5))
After the authentication is completed, the operation unit 26 of the video camera 200 is turned off, and the control unit 24 transmits a power off request as a CEC command to the television receiver 100 via the HDMI input / output unit 28 and the power is turned off. Suppose that the power supply microcomputer 11 of the television receiver 100 receives a power-off request via the HDMI terminal 8 and turns off the power.

  Then, when the power-on operation is performed by the remote control transmitter and the power supply microcomputer 11 of the television receiver 100 is turned on, the processing of the flowchart of FIG. 5 is started.

  First, in step S50, the main CPU 12 initializes a display management flag stored in the NVRAM 13.

  Next, in step S51, the main CPU 12 inquires the connection status of each HDMI port using the CEC command (polling of connection status). If the main CPU 12 is notified of the manufacturer name information by the CEC command from the HDMI device 8 in the power-off state via the HDMI terminal 8 (Y in step S52), the process proceeds to step S53.

  In step S53, the main CPU 12 compares the notified manufacturer name information with the manufacturer name information stored in the NVRAM 13, and if they match (Y in step S53), the main CPU 12 proceeds to step S54. In step S54, the main CPU 12 sets a display management flag, and the process ends. Thereafter, when the HDMI device selection menu display operation is performed with the remote control transmitter, the display management flag is set. Therefore, the main CPU 12 instructs the OSD / scaler 5 based on the model name information stored in the NVRAM 13, The OSD / scaler 5 generates a video signal based on the instruction and outputs it to the display 6. The display 6 displays a menu display in which the model name is displayed next to the HDMI port name notified of the manufacturer name information.

  If the manufacturer name is not notified (N in step S52) or the manufacturer name information does not match (N in step S53), the process is terminated. Thereafter, even if the HDMI device selection menu display operation is performed with the remote control transmitter, the display management flag is initialized, so that the OSD / scaler 5 displays a menu without displaying the model name.

  For example, when the power of the video camera 200 is turned off and then the power supply cradle 300 on which the video camera 200 is placed is connected to another HDMI port, when the power of the television receiver 100 is turned on, the processing of FIG. In step S52, the manufacturer name information is notified from the video camera 200 to the television receiver 100. In step S53, since the manufacturer name information matches, the display management flag is set in step S54, and the HDMI device selection menu is displayed. By the display operation, the model name is displayed on the display 6 next to the HDMI port name changed. Therefore, a correct OSD display can be performed without turning on the video camera 200.

  Further, after turning off the power of the video camera 200, the HDMI cable connected to the power supply cradle 300 is pulled out from the television receiver 100, and an HDMI device made by a manufacturer different from the video camera 200 is turned off and the television receiver 100 is turned off. When the power of the television receiver 100 is turned on, the process of FIG. 5 is started. In step S52, the manufacturer name information is notified from the new HDMI device to the television receiver 100, and in step S53, the manufacturer Since the name information does not match, the process ends with the display management flag being initialized, and the model name is not displayed on the display 6 even if an HDMI device selection menu display operation is performed. Therefore, there is no problem that the model name of the device connected last time is displayed as in the prior art.

  In addition, after the video camera 200 is turned off, when the HDMI cable connected to the power supply cradle 300 is pulled out from the television receiver 100 or the video camera 200 is taken out from the power supply cradle 300, the television receiver 100 is turned on. If it is turned on, the process of FIG. 5 is started, and the manufacturer name information is not notified in step S52. Therefore, the process ends with the display management flag being initialized, and the display 6 is displayed even if there is an HDMI device selection menu display operation. Does not display the model name. Therefore, there is no problem that the model name of the device connected last time is displayed as in the prior art.

  Note that the logical address is notified and stored in the NVRAM 13 in addition to the manufacturer name information and the model name information in step S41 of FIG. 4, and the logical address is notified in addition to the manufacturer name information in step S52 of FIG. In step S53, if the notified manufacturer name information and logical address match the manufacturer name information and logical address stored in the NVRAM 13, the process proceeds to step S54. If not, the process may be terminated. Here, the logical address is device type information, such as “DVR”, “DVD”, and “audio tuner”.

  In the above-described embodiment, when the video camera 200 and the manufacturer are the same but are connected to different devices, the manufacturer name information notified in step S53 and the manufacturer name information stored in the NVRAM 13 match. In S54, the display management flag is set, and when the HDMI device selection menu display operation is performed, the model name of the video camera 200 is displayed, resulting in an incorrect display. However, in the embodiment using the logical address, since the logical address does not match in step S53, the processing ends with the display management flag being initialized, and the video camera is selected even when the HDMI device selection menu display operation is performed. The model name of 200 is not displayed and erroneous display can be prevented.

  Moreover, the modification of the process shown to FIG. 4, FIG. 5 mentioned above is shown in FIG. 7, FIG. According to the following modification, the model name to be OSD displayed can be limited to a predetermined model name.

  In step S70 of FIG. 7, the power of the television receiver 100 is turned on. In step S71, the main CPU 12 matches the manufacturer name information and model name information notified from the video camera 200 with the predetermined manufacturer name information and model name information. If they match (Y in step S71), the process proceeds to step S72. In step S <b> 72, the main CPU 12 stores the notified manufacturer name information and model name information in the NVRAM 13. In step S73, the main CPU 12 sets a display management flag in association with the manufacturer name information and model name information stored in the NVRAM 13. If they do not match in step S71 (N in step S71), the process ends.

  Then, after the video camera 200 and the television receiver 100 are turned off, when the television receiver 100 is turned on, the processing of FIG. 8 is started. First, in step S80, the main CPU 12 is stored in the NVRAM 13. The display management flag is initialized (however, nothing is done when the display management flag is not set).

  In step S81, the main CPU 12 polls the connection state, and if the HDMI device whose power is turned off notifies the main CPU 12 of the manufacturer information (Y in step S82), the process proceeds to step S83. If the manufacturer name information and the model name information are stored in the NVRAM 13 (Y in step S83), the process proceeds to step S84. In step S84, the main CPU 12 compares the notified manufacturer name information with the manufacturer name information stored in the NVRAM 13, and if they match (Y in step S84), the main CPU 12 proceeds to step S85. In step S85, the main CPU 12 sets a display management flag, and the process ends. Thereafter, when the HDMI device selection menu display operation is performed with the remote control transmitter, the display management flag is set. Therefore, the main CPU 12 instructs the OSD / scaler 5 based on the model name information stored in the NVRAM 13, The OSD / scaler 5 generates a video signal based on the instruction and outputs it to the display 6. The display 6 displays a menu display in which the model name is displayed next to the HDMI port name notified of the manufacturer name information.

  If the manufacturer name is not notified (N in step S82), the manufacturer name information and the model name information are not stored in the NVRAM 13 (N in step S83), the manufacturer name information does not match. If this is the case (N in step S84), the processing ends. Thereafter, even if the HDMI device selection menu display operation is performed with the remote control transmitter, the display management flag is initialized or there is no display management flag, so the OSD / scaler 5 does not display the model name on the display 6. Displayed.

  The above embodiment is merely an example, and various modifications can be made without departing from the gist of the present invention. For example, although the television receiver has been described in the above embodiment, the present invention is not limited to this, and can be applied to any display device such as a monitor for a PC. In addition, an interface other than HDMI may be used for connection of devices.

These are figures which show the state which connected the television receiver and video camera which concern on this invention to HDMI. These are the schematic block diagrams of the television receiver which concerns on this invention. These are the schematic block diagrams of a video camera. These are flowcharts regarding the authentication operation according to the present invention. These are the flowcharts regarding the operation | movement after the completion of authentication which concerns on this invention. These are figures which show the example of a HDMI apparatus selection menu display. These are the flowcharts regarding the modification of the authentication operation | movement which concerns on this invention. These are the flowcharts regarding the modification of the operation | movement after the completion of the authentication which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Television receiver 200 Video camera 300 Power supply cradle 400 HDMI cable 1 Antenna 2 Tuner 3 MPEG decoder 4 Video processing circuit 5 OSD / Scaler 6 Display 7 Video input terminal 8 HDMI terminal 9 HDMI receiver 10 Remote control receiver 11 Power supply microcomputer 12 Main CPU
13 NVRAM
DESCRIPTION OF SYMBOLS 20 Camera part 21 Microphone 22 Speaker 23 Image audio processing part 24 Control part 25 External memory interface 26 Operation part 27 Display part 28 HDMI input / output part 29 External memory

Claims (4)

A display unit, a storage unit,
A storage unit that stores in the storage unit the model name information notified from the external device that is in a normal operation state and information on at least one other external device;
Information related to at least one external device other than the model name information notified from the external device in the power saving state in response to the connection status inquiry, and information related to the external device stored in the storage unit by the storage unit; An OSD unit that switches whether to display the model name on the display unit based on the model name information stored in the storage unit by the storage unit, depending on whether or not they match. Display device.   The display device according to claim 1, wherein the OSD unit does not display the model name on the display unit when the connection state inquiry is not received.   The information regarding the at least one other external device and the information regarding the at least one external device other than the model name information include at least one of manufacturer name information and a logical address. The display device according to claim 2.   4. The notification from the external device in the normal operation state and the notification from the external device in the power saving state use a CEC command of the HDMI standard. A display device according to any one of the above.

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