JP2012249201A - Video display device and video display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video display device and a video display method, contributing to decentralization of electric power demand by shifting a time zone in which high power consumption is required by using a battery, and sufficiently suitable for practical use by attempting further effective utilization of battery power.SOLUTION: A video display device includes: signal processing means; illumination means; power supply means; and control means. The signal processing means subjects input signals to signal processing. The illumination means illuminates a video display panel for displaying a video on the basis of video signals outputted from the signal processing means. The power supply means is selectively controlled to a first state and a second state. In the first state, the power supply means supplies power to the signal processing means and the illumination means and charges a battery by using externally supplied power. In the second state, the power supply means supplies power to the illumination means by using the externally supplied power and supplies power to the signal processing means by using power of the battery. The control means controls to set the power supply means to the first state in a first time zone, and to the second state in a second time zone different from the first time zone.

Description

  Embodiments described herein relate generally to a video display device such as a digital television broadcast receiver and a video display method.

  As is well known, in recent years, for example, in a video display device such as a digital television broadcast receiver, a liquid crystal display, a plasma display, or the like has been widely used for the video display. Thereby, even if the display screen is enlarged, the amount of power consumption can be reduced, and power saving can be realized.

  Further, in this type of video display device, the display displays video by irradiating the video display panel with illumination light from the backlight. In this case, the light source of the backlight is changed from a cold cathode tube such as a fluorescent tube or a discharge lamp to an LED (light emitting diode), thereby further saving power.

Utility Model Registration No. 3217721

  A video display device and video that shifts the time period during which power consumption is high by using a battery and contributes to the decentralization of power demand, and that is more suitable for practical use by making more effective use of battery power An object is to provide a display method.

  According to the embodiment, the video display device includes signal processing means, illumination means, power supply means, and control means. The signal processing means performs signal processing on the input signal. The illumination unit illuminates a video display panel that displays a video based on the video signal output from the signal processing unit. The power supply means supplies power to the signal processing means and illumination means with externally supplied power and charges the battery, and supplies power to the illumination means with externally supplied power and power of the battery. Thus, the second state in which power is supplied to the signal processing means is selectively controlled. The control means controls the power supply means to the first state during a preset first time zone, and sets the power supply means to a second state during a preset second time zone different from the first time zone. To control.

The block block diagram shown in order to demonstrate roughly an example of the signal processing system of the digital television broadcast receiver in embodiment. The external view shown in order to demonstrate an example of the remote controller used for the digital television broadcast receiver in the embodiment. The block block diagram shown in order to demonstrate an example of the power supply part used for the digital television broadcast receiver in the embodiment. The flowchart shown in order to demonstrate an example of the processing operation which the power supply control part of the digital television broadcast receiver in the embodiment performs. The figure shown in order to demonstrate an example of the time zone selection screen and time zone setting screen which the digital television broadcast receiver in the embodiment displays. The flowchart shown in order to demonstrate the other example of the processing operation which the power supply control part of the digital television broadcast receiver in the same embodiment performs. The figure shown in order to demonstrate an example of the mode setting screen which the digital television broadcast receiver in the embodiment displays.

  Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 1 schematically shows a signal processing system of a digital television broadcast receiving apparatus 11 described in this embodiment. That is, a digital television broadcast signal received by the antenna 12 is supplied to the tuner unit 14 via the input terminal 13, so that a broadcast signal of a desired channel is selected.

  The broadcast signal selected by the tuner unit 14 is supplied to the demodulation / decoding unit 15, restored to a digital video signal, audio signal, and the like, and then output to the signal processing unit 16. The signal processing unit 16 performs predetermined digital signal processing on the digital video signal and audio signal supplied from the demodulation / decoding unit 15.

    The signal processing unit 16 outputs a digital video signal to the synthesis processing unit 17 and outputs a digital audio signal to the audio processing unit 18. Among these, the synthesis processing unit 17 superimposes and outputs an OSD (on screen display) signal on the digital video signal supplied from the signal processing unit 16.

  The digital video signal output from the synthesis processing unit 17 is supplied to the video processing unit 19 and converted into an analog video signal of a predetermined format. Then, the digital video signal is displayed on the video display panel 20 composed of, for example, liquid crystal. Used for video formation. The video display panel 20 is illuminated with illumination light from a backlight 21 that uses an LED or the like as a light source, thereby displaying a video.

  The audio processing unit 18 converts the input digital audio signal into an analog audio signal in a format that can be reproduced by the speaker 22 at the subsequent stage. The analog audio signal output from the audio processing unit 18 is supplied to the speaker 22 for audio reproduction.

  Here, in the digital television broadcast receiving apparatus 11, all operations including the above-described various reception operations are comprehensively controlled by the control unit 23. The control unit 23 includes a central processing unit (CPU) 23 a and receives operation information from the operation unit 24 installed in the main body of the digital television broadcast receiver 11 or sends it from the remote controller 25. In response to the operation information received by the receiving unit 26, each unit is controlled to reflect the operation content.

  In this case, the control unit 23 uses the memory unit 23b. The memory unit 23b mainly includes a ROM (read only memory) storing a control program executed by the CPU 23a, a RAM (random access memory) for providing a work area to the CPU 23a, various setting information and control information. And so on.

  Further, an HDD (hard disk drive) 27 is connected to the control unit 23. The control unit 23 encrypts the digital video signal and audio signal obtained from the demodulation / decoding unit 15 by the recording / playback processing unit 28 based on the operation of the operation unit 24 and the remote controller 25 by the user, and a predetermined recording format. After being converted to, it can be controlled to be supplied to the HDD 27 and recorded on the hard disk 27a.

  Further, the control unit 23 causes the HDD 27 to read out digital video signals and audio signals from the hard disk 27 a based on the operation of the operation unit 24 and the remote controller 25 by the user, and decodes them by the recording / reproduction processing unit 28. Thereafter, by supplying the signal to the signal processing unit 16, it can be controlled to be used for the above-described video display and audio reproduction.

  An input terminal 29 is connected to the recording / playback processing unit 28. The input terminal 29 is used to directly input digital video signals and audio signals from the outside of the digital television broadcast receiver 11. The digital video signal and audio signal input through the input terminal 29 are supplied to the signal processing unit 16 through the recording / playback processing unit 28 based on the control of the control unit 23, and thereafter, For video display and audio playback.

  Further, the digital video signal and audio signal input through the input terminal 29 are recorded and reproduced on the hard disk 27 a by the HDD 27 after passing through the recording and reproduction processing unit 28 under the control of the control unit 23. To be served.

    A network interface 30 is connected to the control unit 23. This network interface 30 is connected to an external network 31. The network 31 is connected to a network server 32 for providing various services using a communication function via the network 31.

  For this reason, the control unit 23 provides information by accessing the network server 32 via the network interface 30 and the network 31 and performing information communication based on the operation of the operation unit 24 and the remote controller 25 by the user. You can use the service you have.

  In addition, a power supply unit 33 is connected to the control unit 23. Commercial AC power distributed by an electric power company is supplied to the power supply unit 33 via a power supply terminal 34. And this power supply part 33 is based on control of the control part 23, and based on the commercial alternating current power supplied to the power supply terminal 34, each part 14-24, 26- which comprises the digital television broadcast receiver 11 is comprised. It functions to supply necessary power to 28, 30 and the like.

  In this case, the power supply unit 33 incorporates a battery 33a. And this power supply part 33 charges the battery 33a with the commercial alternating current power supplied via the power supply terminal 34 based on control of the control part 23, or supplies the charging power of the battery 33a to each part. Can do.

  The control unit 23 includes a timer 23c, an EPG (electronic program guide) information acquisition unit 23d, a power supply control unit 23e, a recording reservation setting unit 23f, and the like. Among these, the timer 23c is used for the timekeeping operation for acquiring the current time and measuring the passage of time. The EPG information acquisition unit 23d acquires EPG information from the received broadcast signal, the network server 32, and the like.

  Further, the power supply control unit 23e controls the operation of the power supply unit 33, details of which will be described later. In addition, the recording reservation setting unit 23 f has a function for setting recording reservation information for reserved recording on the HDD 27, such as a television broadcast program scheduled to be broadcast or a distribution scheduled program from the network server 32.

  FIG. 2 shows the appearance of the remote controller 25. The remote controller 25 mainly includes a power key 25a, a number key 25b, a channel up / down key 25c, a volume adjustment key 25d, a cursor up key 25e, a cursor down key 25f, a cursor left key 25g, and a cursor right key. 25h, an enter key 25i, a menu key 25j, a return key 25k, an end key 25l, four color (blue, red, green, yellow) color keys 25m, and the like are provided.

  The remote controller 25 is provided with a reproduction stop key 25n, a reproduction / pause key 25o, a backward skip key 25p, a forward skip key 25q, a fast reverse key 25r, a fast forward key 25s, and the like.

  That is, the HDD 27 can be played, stopped, or paused by operating the playback stop key 25n or the playback / pause key 25o of the remote controller 25.

  Further, by operating the reverse skip key 25p or the forward skip key 25q of the remote controller 25, data such as video and audio read from the hard disk 27a by the HDD 27 can be reversed or forward with respect to the reproduction direction. Thus, it is possible to perform a so-called reverse skip or forward skip, which causes a predetermined amount to be skipped.

  Further, by operating the fast reverse key 25r, the fast forward key 25s, etc. of the remote controller 25, the data such as video and audio read from the hard disk 27a by the HDD 27 is continuously reverse or forward with respect to the reproduction direction. Thus, so-called fast reverse playback and fast forward playback can be performed.

  FIG. 3 shows an example of the power supply unit 33. The power supply unit 33 includes an input terminal 33 b to which commercial AC power is supplied through the power supply terminal 34. The electric power supplied to the input terminal 33b is supplied to an AC (alternating current) -DC (direct current) converter 33c and a charge / discharge unit 33d.

  Among these, the AC-DC converter 33c converts the input AC power into a predetermined level of DC power. The direct-current power converted by the AC-DC converter 33c can be supplied to the backlight 21 via the switches SW1 and SW2 and the output terminal 33e. Further, the DC power converted by the AC-DC conversion unit 33c is supplied to the units 14 to 20, 22 to 24, 26 to 28, 30 and the like excluding the backlight 21 through the switches SW1 and SW3 and the output terminal 33f. Can be supplied.

  On the other hand, the charge / discharge unit 33d has a function of converting the input AC power into a predetermined level of DC power and supplying the battery 33a via the switch SW4 for charging. The charge / discharge unit 33d can acquire the power charged in the battery 33a via the switch SW5 and supply the power to the backlight 21 via the switches SW6 and SW7 and the output terminal 33g. Further, the charging / discharging unit 33d uses the power of the battery 33a acquired through the switch SW5 to transmit the power of the battery 33a through the switches SW6 and SW8 and the output terminal 33h to the respective units 14 to 20, 22 to 24, 26 except the backlight 21. ˜28, 30 etc. can be supplied.

  The AC-DC converter 33c constantly monitors the power supplied to the input terminal 33b. For example, the supply of commercial AC power to the power terminal 34 is stopped due to a power failure or the like. When the power supply to the input terminal 33b is stopped, the detection signal A indicating that is output. The detection signal A is supplied to the power control unit 23e through the output terminal 33i.

  Further, the charge / discharge unit 33d also constantly monitors the power supplied to the input terminal 33b. For example, the supply of commercial AC power to the power supply terminal 34 is stopped due to a power failure or the like. When power supply to the terminal 33b is stopped, a detection signal B indicating that is output. The detection signal B is supplied to the power supply control unit 23e through the output terminal 33j.

  Further, the charge / discharge unit 33d monitors the remaining power level of the battery 33a via the switch SW5, and when the remaining power level of the battery 33a falls below a preset threshold level, that fact. Is output. The detection signal C is supplied to the power supply control unit 23e through the output terminal 33k.

  Here, in the power supply control unit 23e, the time information output from the timer 23c, the time information included in the EPG information acquired by the EPG information acquisition unit 23d, and the recording reservation setting by the recording reservation setting unit 23f are set. Recording reservation setting information or the like indicating that it is present is supplied. The power supply control unit 23e performs switch control for on / off control of the switches SW1 to SW8 of the power supply unit 33 based on the input time information, recording reservation setting information, detection signals A, B, C, and the like. Signals SWC1 to SWC8 are generated. The switch control signals SWC1 to SWC8 are supplied to the switches SW1 to SW8 via the input terminal 33l of the power supply unit 33.

  FIG. 4 shows a flowchart summarizing main processing operations performed by the power supply control unit 23e. That is, when the process is started (step S4a), the power supply control unit 23e determines whether or not the power shift mode is set in step S4b.

  In this power shift mode, for example, the battery 33a is charged in a time zone in which there is a margin in power demand, such as late at night, and the battery 33a is in a time zone in which the power consumption is peaked, such as in the afternoon in the daytime. In other words, the digital television broadcast receiver 11 is driven by this power, and in short, it functions so as to shift the time zone where power consumption is large and to distribute power demand.

  If it is determined in step S4b that the power shift mode is set (YES), the power supply control unit 23e determines whether or not the current time has reached a preset time zone in step S4c. . In this case, the preset time zone is assumed to be a time zone in which there is a surplus in power demand, such as at night, and the power charge is reduced. If the power supply control unit 23e determines that the time zone has been reached based on the input time information (YES), in step S4d, the power supply control unit 23e controls the switches SW1 to SW4 of the power supply unit 33 to the on state. SW5 to SW8 are controlled to be turned off.

  Thereby, the DC power converted by the AC-DC converter 33c is supplied to the backlight 21 via the switches SW1, SW2 and the output terminal 33e, and at the same time, the backlight is supplied via the switches SW1, SW3 and the output terminal 33f. No. 21 is supplied to each part 14 to 20, 22 to 24, 26 to 28, 30. Further, the DC power converted by the charge / discharge unit 33d is supplied to the battery 33a via the switch SW4.

  In other words, the digital television broadcast receiver 11 is commercial AC power currently distributed by a power company, and the backlight 21 is turned on and each part 14 to 20, 22 to 24, 26 to 28, 30 except the backlight 21 is used. The signal processing and the like are executed, and at the same time, the battery 33a is charged. In this case, the charging power of the battery 33a is not supplied to the charging / discharging unit 33d, and the power from the charging / discharging unit 33d to the respective units 14 to 20, 22 to 24, 26 to 28, 30 excluding the backlight 21 and the backlight 21. Supply has been stopped.

  In this state, the power supply control unit 23e determines whether or not the current time has passed a preset time zone in step S4e. If it is determined that the current time has not passed (NO), the process of step S4d Returned to If it is determined in step S4e that the current time has passed the preset time zone (YES), the power supply control unit 23e controls the switches SW5 to SW8 of the power supply unit 33 to be on in step S4f. The switches SW1 to SW4 are controlled to be in an off state.

  Thereby, the charging power of the battery 33a is supplied to the charging / discharging unit 33d via the switch SW5, and the power is supplied from the charging / discharging unit 33d to the backlight 21 via the switches SW6 and SW7 and the output terminal 33g. Electric power is supplied from the charge / discharge unit 33d to the units 14 to 20, 22 to 24, 26 to 28, and 30 excluding the backlight 21 through the switches SW6 and SW8 and the output terminal 33h.

  That is, the digital television broadcast receiver 11 uses the power charged in the battery 33 a to turn on the backlight 21, signal processing of each unit 14 to 20, 22 to 24, 26 to 28, 30 except the backlight 21, etc. Will be executed. In this case, the battery 33a is no longer charged, and the power supply from the AC-DC conversion unit 33c to the backlights 21 and the units 14 to 20, 22 to 24, 26 to 28, and 30 other than the backlight 21 is stopped. The

  Thereafter, in step S4g, the power supply control unit 23e determines whether or not the power shift mode has been canceled. If it is determined that the power shift mode has not been canceled (NO), the process returns to step S4c. If it is determined in step S4g that the power shift mode has been canceled (YES), the power supply controller 23e ends the process (step S4h).

  According to the above-described embodiment, for example, the digital television broadcast receiver 11 is driven with the power distributed from the power company in the time zone when the power rate is reduced, such as at night, and the battery 33a is charged, and the other time The digital television broadcast receiver 11 is driven by the power stored in the battery 33a. That is, by using the battery 33a, it is possible to shift the time zone with a large amount of power consumption and contribute to the distribution of power demand.

  In the above-described embodiment, the battery 33a supplies the power to the backlight 21 and the parts 14 to 20, 22 to 24, 26 to 28, and 30 except the backlight 21, but the backlight Since the power consumption of 21 is larger than the total power consumption of the units 14 to 20, 22 to 24, 26 to 28, and 30 excluding the backlight 21, the battery 33a is disadvantageous in terms of power consumption.

  Therefore, when it is determined in step S4e that the current time has passed the preset time zone (YES), the power supply control unit 23e switches the switches SW1, SW2, SW5 of the power supply unit 33 in the next step S4f. SW6 and SW8 are controlled to be on, and switches SW3, SW4 and SW7 are controlled to be off.

  Thus, the DC power converted by the AC-DC converter 33c is supplied to the backlight 21 via the switches SW1 and SW2 and the output terminal 33e, and from the charge / discharge unit 33d to the switches SW6 and SW8 and the output terminal 33h. Electric power is supplied to each of the units 14 to 20, 22 to 24, 26 to 28, and 30 excluding the backlight 21.

  That is, in the digital television broadcast receiving apparatus 11, the backlight 21 is driven by the power supplied from the AC-DC converter 33c, and each of the units 14 to 20, 22 to 24, 26 to excluding the backlight 21 by the power of the battery 33a. The signal processing at 28 and 30 is executed. For this reason, it becomes possible to effectively use the power of the battery 33a while contributing to the decentralization of power demand, which is sufficiently suitable for practical use.

  Further, the digital television broadcast receiver 11 is driven by the power of the battery 33a (the switches SW5 to SW8 are on and the switches SW1 to SW4 are controlled to be off, and the switches SW1, SW2, SW5, SW6, In this case, the power of the battery 33a is consumed when the switch SW8 is turned on and the switches SW3, SW4, and SW7 are turned off), and the remaining power of the battery 33a is preset from the charge / discharge unit 33d. It is assumed that a detection signal C indicating that the level has dropped below the threshold level is output.

  Then, the power supply control unit 23e that has received the detection signal C controls the switches SW1 to SW3 to be on and controls the switches SW4 to SW8 to be off. As a result, the power of the AC-DC conversion unit 33c is supplied to the backlights 21 and the units 14 to 20, 22 to 24, 26 to 28, and 30 except the backlight 21, and the digital television broadcast receiver 11 continues. Will be driven.

  Furthermore, the current time is within a preset time zone, and as shown in step S4d, the digital television broadcast receiver 11 is driven by the power of the AC-DC converter 33c and the battery 33a is charged. Assume that the power supply to the input terminal 33b is stopped due to a power failure or the like, and detection signals A and B indicating that are output from the AC-DC converter 33c and the charge / discharge unit 33d, respectively, in the state where the power is being supplied.

  Then, the power supply control unit 23e that has received the detection signals A and B controls the switches SW5 to SW8 to be in an on state and controls the switches SW1 to SW4 to be in an off state. As a result, the charging power of the battery 33a is supplied to the backlight 21 and the units 14 to 20, 22 to 24, 26 to 28, and 30 except the backlight 21, and the digital television broadcast receiver 11 is continuously driven. Will be.

  In particular, when the recording reservation information is set in the recording reservation setting unit 23f and the recording reservation is set, if the power supply to the input terminal 33b is stopped due to a power failure or the like, the recording operation cannot be performed. Scheduled recording is not possible. For this reason, when the power supply control unit 23e determines that the recording reservation setting information is supplied and the recording reservation is set, when the power supply to the input terminal 33b is stopped due to a power failure or the like, the battery 33a is charged. By switching to electric power, the digital television broadcast receiving apparatus 11 is continuously driven so that reserved recording can be performed.

  When power supply to the input terminal 33b is restored, that is, when the detection signals A and B are no longer output from the AC-DC converter 33c and the charge / discharge unit 33d, the power supply controller 23e switches the switches SW1 to SW4. Is turned on, the switches SW5 to SW8 are turned off, and the power of the AC-DC converter 33c is used to drive the digital television broadcast receiver 11 and charge the battery 33a. Try to bring it back.

  Here, the time zone for charging the battery 33a is automatically set to a time zone in which the electricity bill is reduced according to the area where the digital television broadcast receiving apparatus 11 is installed, and the user Can select the mode to be set in the designated time zone. In this selection, the user operates the menu key 25j of the remote controller 25 to separate into a plurality of menu screens having a hierarchical structure, whereby a time zone selection screen 35 as shown in FIG. 20 is displayed.

  In this time zone selection screen 35, an item 35a “automatic setting” and an item 35b “user setting” are displayed as options, and the user operates the cursor left or right movement key 25h of the remote controller 25 as desired. The items 35a and 35b are selected and the enter key 25i is operated.

  When “automatic setting” is selected, the electric power is set according to the area where the digital television broadcast receiver 11 is installed (specified by the postal code entered when the digital television broadcast receiver 11 is installed). The time zone when the fee is reduced is automatically set. When “user setting” is selected, a time zone setting screen 36 as shown in FIG. 5B is displayed, and the user sets the time zone himself. The time zone setting screen 36 displays an input field 36a for inputting a start time and an input field 36b for inputting an end time. Then, the user operates the cursor left or right movement key 25h of the remote controller 25 to select the desired input fields 35a and 35b, inputs the hour and minute with the numeric keys 25b, and then operates the enter key 25i to set the time. The band is set.

  FIG. 6 is a flowchart summarizing another example of the processing operation performed by the power supply control unit 23e. That is, when the process is started (step S6a), the power supply control unit 23e determines whether or not the secure recording reservation mode is set in step S6b.

  In this safe recording reservation mode, when the power supply to the input terminal 33b is stopped due to a power failure or the like in the state where the recording reservation is set, the digital television broadcast receiving apparatus 11 is automatically switched to the power of the battery 33a. It is made to function so that scheduled recording can be performed without failure even if a power failure occurs.

  If it is determined in step S6b that the secure recording reservation mode is set (YES), the power supply control unit 23e performs recording by setting the recording reservation information in the recording reservation setting unit 23f in step S6c. It is determined whether or not a reservation is being made.

  In this case, the power supply control unit 23e controls the switches SW1 to SW4 to the on state and controls the switches SW5 to SW8 to the off state, and the power that the digital television broadcast receiver 11 is supplied to the input terminal 33b. It is assumed that the battery 33a is charged.

  If it is determined that the recording reservation is being made (YES), the power supply control unit 23e determines whether or not the power supply to the input terminal 33b is stopped in step S6d. This determination is made when the power supply control unit 23e outputs detection signals A and B indicating that power supply to the input terminal 33b is stopped due to a power failure or the like from the AC-DC conversion unit 33c and the charge / discharge unit 33d, respectively. This is done by determining whether or not.

  Here, when it is determined that the power supply to the input terminal 33b is not stopped (NO), the power supply control unit 23e returns to the process of step S6c, and the power supply to the input terminal 33b is stopped. Is determined (YES), the switches SW5 to SW8 are controlled to be in the on state and the switches SW1 to SW4 are controlled to be in the off state in step S6e.

  As a result, the charging power of the battery 33a is supplied to the backlight 21 and the units 14 to 20, 22 to 24, 26 to 28, and 30 except the backlight 21, and the digital television broadcast receiver 11 is continuously driven. Will be. For this reason, it becomes possible to perform reserved recording.

  Thereafter, the power supply controller 23e determines whether or not the power supply to the input terminal 33b has been restored in step S6f. This determination is also made by determining whether or not the detection signals A and B are output from the AC-DC conversion unit 33c and the charge / discharge unit 33d by the power supply control unit 23e.

  When it is determined that the power supply to the input terminal 33b has not been restored (NO), the power supply control unit 23e is returned to the process of step S6c, and the power supply to the input terminal 33b is restored. If it is determined (YES), in steps S6g, the switches SW1 to SW4 are controlled to be on and the switches SW5 to SW8 are controlled to be off.

  As a result, the power supplied to the input terminal 33b drives the backlights 21 and the units 14 to 20, 22 to 24, 26 to 28, and 30 except for the backlight 21, so that reserved recording can be performed.

  Thereafter, in step S6h, the power supply control unit 23e determines whether or not the secure recording reservation mode has been canceled. If it is determined that it has not been canceled (NO), the process returns to step S6c. If it is determined in step S6h that the safe recording reservation mode has been canceled (YES), the power supply control unit 23e ends the process (step S6i).

  Here, the user can set whether to drive the digital television broadcast receiving apparatus 11 in the above-described power shift mode or secure recording reservation mode. This setting is performed by the user operating the menu key 25j of the remote controller 25 and dividing it into a plurality of menu screens having a hierarchical structure, whereby a mode setting screen 37 as shown in FIG. Is done.

  In this mode setting screen 37, an item 37a “Power shift” and an item 37b “Reliable recording reservation” are displayed as options, and the user operates the cursor left or right movement key 25h of the remote controller 25 as desired. The items 37a and 37b are selected, and the enter key 25i is operated to set.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by variously modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 11 ... Digital television broadcast receiver, 12 ... Antenna, 13 ... Input terminal, 14 ... Tuner part, 15 ... Demodulation decoding part, 16 ... Signal processing part, 17 ... Synthesis processing part, 18 ... Audio processing part, 19 ... Video | video Processing unit 20 ... Video display panel 21 ... Backlight 22 ... Speaker 23 ... Control unit 23a ... CPU 23b ... Memory unit 23c ... Timer 23d ... EPG information acquisition unit 23e ... Power control unit 23f ... Recording reservation setting unit 24 ... Operating unit 25 ... Remote controller 26 ... Receiving unit 27 ... HDD 27a ... Hard disk 28 ... Recording / playback processing unit 29 ... Input terminal 30 ... Network interface 31 ... Network 32 ... Network server, 33 ... Power supply unit, 33a ... Battery, 33b ... Input terminal, 33c ... AC-DC conversion unit, 33 ... discharge unit, 33E～33k ... output terminal, 33l ... input terminal, 34 ... power supply terminal, 35 ... time zone selection screen, 36 ... time zone setting screen, 37 ... mode setting screen.

Claims (8)

Signal processing means for performing signal processing on the input signal;
Illuminating means for illuminating a video display panel for displaying video based on the video signal output from the signal processing means;
A first state in which power is supplied to the signal processing means and the illumination means with externally supplied power and the battery is charged, and power is supplied to the illumination means with externally supplied power and power of the battery Power supply means selectively controlled to a second state of supplying power to the signal processing means,
The power supply means is controlled to a first state during a first time zone set in advance, and the power supply means is set to a second state during a second time zone that is different from the first time zone. An image display device comprising control means for controlling.   In the state where the power supply means is controlled to the second state, the control means, when the remaining amount of power of the battery falls below a preset threshold level, the signal using externally supplied power The video display apparatus according to claim 1, wherein control is performed so that power is supplied to the processing means and the illumination means.   The control means supplies power to the signal processing means and the illumination means with the power of the battery when the power supply from the outside is stopped while the power supply means is controlled to the first state. The video display device according to claim 1, which is controlled to the above.   4. The video display device according to claim 3, wherein the control means controls the power supply means to the first state when the external power supply is restored.   The video display device according to claim 1, wherein the control means sets the first time zone to include a time zone in which an electricity bill is cheaper than the second time zone.   The video display device according to claim 1, wherein the control means can set the first time zone by an external operation.   The video display device according to claim 1, wherein the signal processing unit includes a recording reservation unit for performing reservation recording of the video signal. The signal processing means performs signal processing on the input signal,
Illuminating a video display panel for displaying video based on the video signal output from the signal processing means by the lighting means,
In the first time zone set in advance, while supplying power to the signal processing means and the illumination means with power supplied from outside, charging the battery,
In a preset second time zone different from the first time zone, power is supplied to the illumination means with externally supplied power, and power is supplied to the signal processing means with the power of the battery. Video display method.

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