JP2008177935A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent OSD from being displayed in each case even if a no-signal state temporarily occurs. <P>SOLUTION: A no-signal detection means detects the no-signal of a source signal. A display device has a notifying means notifying a user that the source signal is in the no-signal when the source signal is in the no-signal. A control means prevents the OSD from being displayed in each case even if a no-signal state temporarily occurs by operating the notifying means and performing notification when a period at which the source signal is in the no-signal continues for a predetermined time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a display device having a function of displaying an input state of an input source by an OSD (on-screen display).

  In a display device such as a TV, it is a device that can connect multiple devices and switch the input. In order to make it clear to the user, for example, when the video input 1 is selected, there is a function of displaying “input 1” or the like on an OSD (on-screen display). Even when input switching is not performed, an OSD such as “input 1 no signal” is also displayed when there is no signal due to, for example, turning off the power of the connected device.

A conventional television screen display device capable of stable on-screen display even when there is no video signal as described above is known (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 10-145696

  The display in the conventional display device is displayed immediately when no signal is detected. This is effective for making the user recognize the no-signal state and clarifying that it is not a failure.

  However, the OSD is displayed every time when the connected device is temporarily in a no-signal state due to repeated playback / turnback timing of a DVD or the like, or menu switching.

As described above, the conventional display device has a problem in that the OSD is displayed each time even when the no-signal state is temporarily generated.
An object of the present invention is to prevent an OSD from being displayed every time when a no-signal state is temporarily established.

  In order to achieve the above object, according to the present invention, no signal detecting means for detecting no signal of a source signal, and when the source signal is no signal, the user is notified that the source signal is no signal. There is provided a display device comprising: a notification means for performing the notification; and a control means for operating the notification means when the source signal is non-signaled for a predetermined period.

The present invention relating to the apparatus is also established as an invention relating to a method, and the present invention relating to a method is also established as an invention relating to an apparatus.
Further, the present invention relating to an apparatus or a method has a function for causing a computer to execute a procedure corresponding to the invention (or for causing a computer to function as a means corresponding to the invention, or for a computer to have a function corresponding to the invention. It can also be realized as a program (for realizing the program), and can also be realized as a computer-readable recording medium that records the program.

  According to the present invention, it is possible to prevent the OSD from being displayed every time when a no-signal state is temporarily established.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 schematically shows an appearance of a digital television broadcast receiving apparatus 111 to which the present invention is applied, and an example of a network system configured around the digital television broadcast receiving apparatus 111.

  That is, the digital television broadcast receiver 111 mainly includes a thin cabinet 112 and a support base 113 that supports the cabinet 112 upright. Then, it is transmitted to the cabinet 112 from, for example, a flat panel type video display device 114 including a surface-conduction electron-emitter display (SED) display panel, a liquid crystal display panel, a speaker 115, an operation unit 116, and a remote controller 117. A light receiving unit 118 for receiving operation information is installed.

  Further, for example, a first memory card 119 such as an SD (Secure Digital) memory card, an MMC (Multimedia Card), and a memory stick can be attached to and detached from the digital television broadcast receiving apparatus 111. Information such as programs and photographs is recorded on and reproduced from the memory card 119.

  Further, for example, a second memory card (IC card) 120 in which contract information or the like is recorded can be attached to and detached from the digital television broadcast receiving apparatus 111. Information is stored in the second memory card 120. Recording / reproduction is performed.

The digital television broadcast receiving apparatus 111 includes a first HDMI terminal 121, a second HDMI terminal 122, and an analog video input terminal 123.
A DVD player 125 is connected to the first HDMI terminal 121 via an HDMI cable.
A DVD recorder 126 is connected to the second HDMI terminal 122 via an HDMI cable.
An analog video signal from the VTR 127 is input to the analog video input terminal 123.
FIG. 2 shows a main signal processing system of the digital television broadcast receiving apparatus 111 described above.
That is, the satellite digital television broadcast signal received by the BS / CS digital broadcast receiving antenna 243 is supplied to the satellite digital broadcast tuner 245 a via the input terminal 244.

  The tuner 245a selects a broadcast signal of a desired channel based on a control signal from the control unit 261, and outputs the selected broadcast signal to a PSK (Phase Shift Keying) demodulator 245b.

  The PSK demodulator 245b demodulates the broadcast signal selected by the tuner 245a according to a control signal from the control unit 261, obtains a transport stream including a desired program, and outputs the transport stream to the TS decoder 245c.

  The TS decoder 245c is obtained by performing TS decoding processing on a signal multiplexed with a transport stream (TS) by a control signal from the control unit 261, and depacking a digital video signal and an audio signal of a desired program. A PES (Packetized Elementary Stream) is output to the STD buffer 247 f in the signal processing unit 247.

In addition, the TS decoder 245c outputs section information transmitted by digital broadcasting to the section processing unit 247h in the signal processing unit 247.
The terrestrial digital television broadcast signal received by the terrestrial broadcast receiving antenna 248 is supplied to the terrestrial digital broadcast tuner 250 a via the input terminal 249.

  The tuner 250a selects a broadcast signal of a desired channel based on a control signal from the control unit 261, and outputs the selected broadcast signal to an OFDM (Orthogonal Frequency Division Multiplexing) demodulator 250b.

  The OFDM demodulator 250b demodulates the broadcast signal selected by the tuner 250a based on the control signal from the control unit 261, obtains a transport stream including a desired program, and outputs the transport stream to the TS decoder 250c.

  The TS decoder 250c is obtained by performing TS decoding processing on a signal multiplexed with a transport stream (TS) by a control signal from the control unit 261, and depacking a digital video signal and an audio signal of a desired program. A PES (Packetized Elementary Stream) is output to the STD buffer 247 f in the signal processing unit 247.

In addition, the TS decoder 250c outputs section information transmitted by digital broadcasting to the section processing unit 247h in the signal processing unit 247.
Here, the signal processing unit 247 selectively performs predetermined digital signal processing on the digital video signal and the audio signal respectively supplied from the TS decoder 245c and the TS decoder 250c when watching TV. The data is output to the graphic processing unit 254 and the audio processing unit 255. The signal processing unit 247 selects a content reproduction signal input from the control unit 261 during content reproduction, performs predetermined digital signal processing, and outputs the signal to the graphic processing unit 254 and the audio processing unit 255.

  The control unit 261 receives various data for acquiring a program, electronic program guide (EPG) information, program attribute information (program genre, etc.), subtitle information (service information, SI, PSI) from the signal processing unit 247. Have been entered.

The control unit 261 performs image generation processing to display EPG and subtitles from the input information, and outputs the generated image information to the graphic processing unit 254.
The section processing unit 247h includes various data for acquiring a program, electronic program guide (EPG) information, program attribute information (program genre, etc.), subtitles from the section information input from the TS decoder 245c (250c). Information or the like (service information, SI or PSI) is output to the control unit 261.

  The graphic processor 254 includes (1) a digital video signal supplied from the AV decoder 247g in the signal processor 247, (2) an OSD signal generated by the OSD (On Screen Display) signal generator 257, ( 3) A function of synthesizing image data obtained by data broadcasting and (4) the EPG and subtitle signal generated by the control unit 261 and outputting the synthesized result to the video processing unit 258.

  Further, when displaying a caption by caption broadcasting, the graphic processing unit 254 performs a process of superimposing the caption information on the video signal based on the caption information controlled by the control unit 261.

  The digital video signal output from the graphic processing unit 254 is supplied to the video processing unit 258. The video processing unit 258 converts the input digital video signal into an analog video signal in a format that can be displayed on the video display 114, and then outputs the analog video signal to the video display 114 to display the video. 259 to the outside.

  The audio processing unit 255 converts the input digital audio signal into an analog audio signal in a format that can be reproduced by the speaker 115, and then outputs the analog audio signal to the speaker 115 for audio reproduction. Through the outside.

  Here, in the digital television broadcast receiving apparatus 111, all operations including the above-described various receiving operations are comprehensively controlled by the control unit 261. The control unit 261 includes a CPU (Central Processing Unit) or the like, receives operation information from the operation unit 116, or receives operation information sent from the remote controller 117 via the light receiving unit 118. Each part is received and controlled so that the operation content is reflected.

  In this case, the control unit 261 mainly includes a ROM (Read Only Memory) 261a that stores a control program executed by the CPU, a RAM (Random Access Memory) 261b that provides a work area for the CPU, and various setting information. And a non-volatile memory 261c in which control information and the like are stored.

  The control unit 261 is connected to a card holder 266 to which the first memory card 119 can be attached via a card I / F (Interface) 265. As a result, the control unit 261 can transmit information to the first memory card 119 mounted on the card holder 266 via the card I / F 265.

  Further, the control unit 261 is connected via a card I / F 267 to a card holder 268 in which the second memory card 120 can be mounted. Thus, the control unit 261 can transmit information to the second memory card 120 mounted on the card holder 268 via the card I / F 267.

  The control unit 261 is connected to the first HDMI input terminal 121 via the HDMI_I / F 269. Accordingly, the control unit 261 can transmit information to the DVD player 125 connected to the first HDMI input terminal 121 via the HDMI_I / F 269.

  Further, the control unit 261 is connected to the second HDMI input terminal 122 via the HDMI_I / F 270. Accordingly, the control unit 261 can transmit information to the DVD recorder 126 connected to the second HDMI input terminal 122 via the HDMI_I / F 270.

  The control unit 261 is connected to the analog video input terminal 123 via the analog video I / F 271. As a result, the control unit 261 can transmit information via the VTR 127 connected to the analog video input terminal 123 and the analog video I / F 271.

Next, how to set the operation when the digital television broadcast receiving apparatus 111 detects no signal will be described.
The GUI screen shown in FIG. 3 is displayed on the video display 114. A user operation method for the GUI screen can be realized by using various known GUI interface techniques.

  By pressing the setting button 301 on this GUI screen, the setting contents set on this GUI screen are stored in the nonvolatile memory 261c. For example, since “delay” is selected in the example of FIG. 3, the delay display is set, and further, the number of seconds to be delayed is set to 3 seconds. Here, the user sets the number of seconds, but this fixed time may be fixed in advance and fixed to 5 seconds or the like.

In this embodiment, the delay can be given or not, and the delay amount can be changed by user setting.
Next, the operation of the control unit 261 when the digital television broadcast receiving apparatus 111 detects no signal will be described with reference to FIG. In FIG. 4, it is assumed that the digital television broadcast receiving apparatus 111 first selects the first HDMI input terminal 121 as an input source and displays the video signal from the DVD player 125 on the video display 114. .

(Step S401) The control unit 261 reads setting information stored in the nonvolatile memory 261c.
(Step S402) The control unit 261 detects the no-signal state of the first HDMI input terminal 121 selected as the input source.
(Step S403) The control unit 261 determines whether or not delay setting has been made from the setting information read in step S401. If the delay is set, the process proceeds to step S404, and if not, the process proceeds to step S406, and OSD display such as “no signal at first HDMI input terminal” is immediately performed as shown in FIG.

In the case of the setting contents shown in the above example of FIG. 3, since the delay is set, the process proceeds to step S404.
(Step S404) The control unit 261 detects that there is no signal for a certain delay time. This fixed time may be fixed in advance and fixed to 5 seconds or the like, or may be set to an arbitrary time by the user as shown in FIG.

  (Step S405) When the control unit 261 detects that there is no signal for a certain delay time, for example, 3 seconds in the example set in FIG. 3, the control unit 261 moves to step S406, and as shown in FIG. OSD display such as “No input terminal”. In this way, by displaying the OSD when no signal continues for a certain time, the OSD display is not performed in response to an instantaneous signal interruption instead of the original no signal.

(Step S406) As shown in FIG. 5, the control unit 261 performs OSD display indicating that the input source is no signal input, such as “first HDMI input terminal no signal”.
Instead of displaying that there is no signal input in characters as shown in FIG. 5, it may be possible to notify the user that there is no signal input by simply using a blue background screen.

As described above, according to the present invention, it is possible to prevent the OSD from being displayed every time when a no-signal state occurs temporarily.
Furthermore, in the above-described embodiment, the user can set whether to have a delay or not, and the user can set a delay amount when the delay is given, so that more detailed notification control can be performed. In addition, by making the time variable, the original function of notifying the user of the signal when there is no original signal is not lost.

The OSD display is not frequently displayed in response to a momentary signal shut-off.
The optimal OSD display timing can be dynamically obtained by controlling the OSD display timing when there is no signal in accordance with the operation status of the connected device.
Some devices have the function of returning to the last channel when no signal is detected, but they do not respond to instantaneous signal interruptions.
When no signal is detected to reduce power consumption or prevent burn-in of the monitor, some have functions such as dimming the backlight and lowering the brightness, but they do not respond to instantaneous signal interruptions.

(Modification)
If the power status and playback status of the connected device such as HDMI can be acquired, this method is taken into account. For example, when the power of the connected device is turned on, automatic setting such as enabling this function is performed. You may do it. For example, as the operation of the control unit 261, as shown in FIG. 6, step S601 is newly inserted between step S403 and step S404 described with reference to FIG. It is only necessary to detect the power-on state of the device and operate the functions after step S404 only when the power is on. Further, it is only necessary to detect the switching of the reproduction state from the content reproduction state to the content reproduction stop and to operate the functions after step S404 only at this switching time.

The input source is not limited to the HDMI input and the analog video signal input, but may be an input from a tuner.
Further, the method of notifying the user that the input source is no signal is not necessarily limited to displaying characters. For example, notification may be made by displaying a specific image or reproducing an audio signal.

  Even with such a modification, according to the present invention, it is possible to prevent the OSD from being displayed every time when a no-signal state is temporarily achieved. Furthermore, according to the power-on state of the source device, it is possible to turn on / off the function of preventing the OSD from being displayed each time the signal is temporarily turned off.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined. For example, the first embodiment and the second embodiment may be combined and a genre and a channel may be combined as desired program attributes.

The figure for demonstrating the external appearance of the digital television broadcast receiver 111 to which this invention is applied, and the network system comprised centering on this digital television broadcast receiver 111. FIG. The figure which shows the main signal processing systems of the digital television broadcast receiver. The figure which shows the setting GUI screen of the digital television broadcast receiver displayed on the video display. The flowchart which shows operation | movement of the control part 261 when the digital television broadcast receiver 111 detects a no signal. The figure which shows the example of the screen displayed on the video display. The flowchart which shows operation | movement of the control part 261 when the digital television broadcast receiver 111 detects a no signal.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 111 ... Digital television broadcast receiver, 112 ... Cabinet, 113 ... Support stand, 114 ... Video display, 115 ... Speaker, 116 ... Operation part, 117 ... Remote controller, 118 ... Light receiving part, 119 ... First memory card 120 ... second memory card 121 ... first HDMI input terminal 122 ... second first HDMI input terminal 123 ... analog video input terminal 125 ... DVD player 126 ... DVD recorder 127 ... VTR .

Claims (5)

No signal detection means for detecting no signal of the source signal;
A notification means for notifying a user that the source signal is no signal when the source signal is no signal;
A display device comprising: control means for operating the notifying means to perform the notification when a period in which the source signal is not present continues for a predetermined period. The control means includes a first mode in which the notification means is operated to perform the notification when a period in which the source signal is no signal continues for a predetermined period, and a period in which the source signal is not in a predetermined period A second mode in which the notification means is operated and the notification is performed without continuing,
The display device according to claim 1, further comprising mode setting means for a user to set one of the first mode and the second mode. The control means includes a first mode in which the notification means is operated to perform the notification when a period in which the source signal is no signal continues for a predetermined period, and a period in which the source signal is not in a predetermined period A second mode in which the notification means is operated and the notification is performed without continuing,
Means for monitoring the power supply state and playback state of the device outputting the source signal;
The display device according to claim 1, further comprising mode setting means for setting one of the first mode and the second mode in accordance with the monitoring result.   4. The display device according to claim 1, further comprising means for a user to set the predetermined time.   5. The display device according to claim 1, wherein the notification unit notifies the user that the source signal is no signal by a video signal or an audio signal. 6.

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