JP5535283B2 - Television receiver - Google Patents

Description

  Embodiments described herein relate generally to a television receiver that can be driven by a battery.

  Various portable electronic devices such as notebook personal computers (PCs) and PDAs have been developed. This type of electronic device is configured so that it can be driven by either a battery or an AC power supply in consideration of both the use when carrying without an AC commercial power supply and the use indoors in an office or home. . As the battery, a rechargeable secondary battery such as a nickel metal hydride battery or a lithium ion battery is usually used.

  Whether to use a commercial power supply or a battery is often determined by whether or not an AC adapter is connected. When the AC adapter is connected to the PC, the power supply source of the PC is switched from the battery to the AC adapter, and the battery is charged by the AC adapter. While the AC adapter is removed from the PC, the battery is used as a drive power source.

Japanese Patent No. 3730414 JP 2007-219234 A Japanese Patent Laid-Open No. 06-149173 JP 2004-194110 A JP 2010-134455 A

  In recent years, the amount of power demand exceeds the amount of power supplied from a power plant of a power supply company, and it is expected that a large-scale blackout will occur. In order to avoid this, it is considered to implement a planned power outage or a ring power outage in which the power supply company sequentially stops / restarts the power supply for each certain area. Among electric appliances in general households, the power consumption of a television receiver is relatively large. Therefore, it is considered to reduce the power demand of the television receiver. For example, it is conceivable that a battery is built in like a conventional PC and can be driven by an AC commercial power source or a battery.

  However, even if conventional PC battery control is applied to a television receiver as it is, the power demand cannot be reduced so much.

  An object of the present invention is to provide a television receiver capable of effectively using power supplied from a power supply company.

According to the embodiment, the battery-driven television receiver includes a receiver, a switching unit, and a power controller . The receiving unit receives the mode switching signal. The switching means switches from the commercial power supply drive mode to the battery drive mode in response to the mode switching signal received by the receiving unit while the television receiver is driven by a commercial power supply , and the television receiver receives the reception while the battery is driven by the battery. depending on the received the mode switching signal by the Department Ru switched from the battery drive mode to the commercial power supply mode. The power controller is configured to reduce power consumption in the battery driving mode as compared with the commercial power driving mode, and executes one or a plurality of power saving operations selected by the user, and the power saving operation is performed by the illumination intensity of the backlight. Reduction or video size reduction .

It is a block diagram which shows a typical example of the whole structure of the television receiver by embodiment. It is a figure which shows the typical outline | summary of the remote controller of FIG. It is a figure which shows the typical example of the some display examples which the television receiver of FIG. 1 outputs to a display. 3 is a typical flowchart illustrating an example of the operation of the television receiver of FIG. 1. 5 is a typical flowchart showing details of a power saving operation in the flowchart of FIG. 4. It is a figure which shows the typical example of the screen in the indicator at the time of the power saving operation | movement of the television receiver of FIG. It is a figure which shows the example of 1 structure of the backlight mechanism in the indicator of the television receiver of FIG. It is a figure which shows the other structural example of the backlight mechanism in the indicator of the television receiver of FIG. It is a figure which shows the example which reduces the illumination intensity of the backlight in the display of the television receiver of FIG. It is a figure which shows the example of a menu when performing the energy-saving setting for power saving with respect to the television receiver of FIG.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is an example of a stationary television receiver to which the embodiment is applied. The UHF antenna 101 can catch radio waves of terrestrial television broadcasting. When the received radio wave intensity is weak, a booster (amplifier) 102 is connected to the antenna 101. When the intensity of the received radio wave is strong, an attenuator (attenuator) is connected instead of the booster 102. Electric power is supplied to the booster 102 and the attenuator. In the current digital terrestrial broadcasting, a broadcast signal of 12 segments (also referred to as a full segment or a full segment) and a broadcast signal of one segment are set. The UHF antenna 101 is used to receive a full segment broadcast signal. When a one-segment broadcast signal is received, the indoor antenna 105 is used.

  The UHF antenna 101 may be referred to as an external antenna or an outdoor antenna, and the indoor antenna 105 may be referred to as an internal antenna or an indoor antenna.

  The UHF antenna 101 can be connected to the tuner 110 via the antenna connection board 108. The indoor antenna 105 can also be connected to the tuner via the antenna connection board 108. When the antenna connector of the antenna connection board 108 is one, when the use state of the UHF antenna 101 is changed to the use state of the indoor antenna 105, the terminal of the UHF antenna 101 is extracted from one connector of the antenna connection plate 108. Instead, the terminal of the indoor antenna 105 is connected to the one connector of the antenna connection plate 108. When there are two antenna connectors on the antenna connection board 108, the UHF antenna 101 and the indoor antenna 105 are always connected to the two connectors on the antenna connection plate 108, and one of them is selected by a changeover switch (not shown). Thus, the selected antenna is in use.

  The tuner 110 includes a full segment reception circuit 111 and a one segment reception circuit 112, and is set to one of the reception states. A control signal for switching the reception state is output from the control block 120. The control block 120 will be described in more detail later.

  The demodulated program signal included in the channel selected by the tuner 110 is input to the signal processor 200. The signal processor 200 includes a video signal processing circuit 201 and an audio signal processing circuit 202. The video signal processing circuit 201 decodes (decodes) the encoded video signal into the original baseband video signal. Examples of encoding / decoding methods include MPEG (Moving Picture Experts Group) and H.264 / AVC (Advanced Video Coding). The video signal processing circuit 201 includes a high image quality processor 201a that improves the resolution of an image. The image quality improvement processor 201a performs not only resolution interpolation but also processing for expanding the color depth and dynamic range and processing for increasing the number of frames. The baseband video signal output from the video signal processing circuit 201 is supplied to the display device 300. The display 300 includes a liquid crystal display, a plasma display, an organic EL display, and the like.

  The audio signal processing circuit 202 extracts an audio stream from the program signal and decodes it. The decoded audio signal is converted into an analog signal by the digital-analog converter 203 and output as a sound. In FIG. 1, a headphone 204 with low power consumption is shown as an audio output device, but the present invention is not limited to the headphone 204, and may be a stationary speaker.

  The signal processor 200 can be connected to an external device under the control of the control block 400. For example, it can be connected to an external information recording / reproducing apparatus such as an optical disc (DVD, BD (registered trademark)) recording / reproducing apparatus via an HDMI (High Definition Multimedia Interface) 205. Therefore, the signal processor 200 can receive a reproduction signal from an external information recording / reproducing apparatus, and can perform signal processing for display output and signal processing for audio output. Further, it is possible to transmit a recording signal and a control signal to an external information recording / reproducing apparatus. As a result, the external information recording / reproducing apparatus can be commonly controlled by a remote controller (described later) of the television receiving apparatus. The HDMI 205 can transmit digital video / audio signals to an external device with high quality. The digital signal corresponds to 480i, 480p, 720p, 1080i, 1080p.

  The signal processor 200 can also be connected to a hard disk drive (HDD) 207 via a USB (Universal Serial Bus) 206 under the control of the control block 400. The hard disk drive 207 is equipped with a battery 208, and can be driven by itself for about 2-3 hours at the time of a power failure.

  The control block 400 includes a main microprocessing unit (hereinafter referred to as “main MPU”) 401 and a sub-microprocessing unit (hereinafter referred to as “sub-MPU”) 402. The main MPU 401 includes an electronic program guide management system (hereinafter referred to as EPG management system) 401a, an operation state control system 401b, a display state control system 401c, and an interface control system 401d.

  The names of the control block 400, the names of the main MPU 401 and the sub MPU 402, the names of the EPG management system 401a, the operation state control system 401b, the display state control system 401c, and the interface control system 401d are not limited to such names. Absent. For example, a module or a block may be used instead of the main control circuit, the sub control circuit, the EPG processing circuit, the operation state control circuit, the display state control circuit, the HDMI state control circuit or the circuit. Moreover, although the name was classified according to the function here, a name in which the functions are integrated or a combination of the functions may be given.

  The EPG management system 401 a can acquire program information included in the Internet or broadcast signal, create program guide data, and store it in a random access memory (hereinafter referred to as RAM) 451. Further, the EPG management system 401 a can read out the program table stored in the RAM 451 and output it to the display device 300 in cooperation with the control operation of the display state control system 401 c. Furthermore, the information of the program guide stored in the RAM 451 can be corrected and changed periodically.

  Note that the RAM 451 may be any memory that can be written and read, and includes a nonvolatile memory. Of course, the RAM 451 may store various data (icons, warning character information, channel numbers, etc.) for on-screen display (OSD). Further, a read-only memory (ROM) 452 is connected to the control block 400, and various software used in, for example, a television receiver is stored in the ROM 452. When the television receiver operates, the software is expanded in, for example, the RAM 451 and executes an operation procedure according to an operation signal or a command signal.

  The operation state control system 401b controls the state of the block in the television receiver in response to an external or internal state signal or an external operation signal. For example, the reception state that can be placed in the tuner 110 can be switched from the one-segment reception state to the full-segment reception state, or can be switched from the full-segment reception state to the one-segment reception state. Furthermore, the signal processing state in the signal processor 200 can be controlled. For example, it is also possible to control color adjustment, brightness adjustment, partial shut-off of the power supply, etc. according to set conditions relating to automatic or manual.

  The display state control system 401c can control the display area of the display device 300, the backlight adjustment, and the illumination area of the backlight, and also controls the luminance of the video signal, the enlargement / reduction control, and the movement control of the display position. And so on.

  The interface control system 401d transmits an inquiry signal to an external device connected to the HDMI terminal, and based on the response signal, what external information recording / reproducing device is connected, or the external information recording / reproducing device And a process of transmitting or receiving a control signal or information corresponding to the recognition result to the external information recording / reproducing apparatus via the signal processor 200.

  The sub MPU 402 includes a power supply control system 402a and an operation signal support system 402b. The operation signal correspondence system 402b analyzes the operation signal when the operation signal transmitted from the remote controller 700 is input via the remote control signal receiver 455. The remote control signal receiver 455 is provided in a part of the front frame of the display device 300. The operation signal correspondence system 402b controls the operation state of the television receiver according to the result of analyzing the operation signal. As the operation state, on / off of the main power supply, start / stop of the sub MPU 401, command transmission to the sub MPUP 401, and the like are performed. The operation signal can be input not only from the remote control receiver 455 but also from the manual operation unit 456. The main operation unit 456 is provided on the side surface of the display 300 or the like. When the manual operation unit 456 is operated by the user, the operation signal is analyzed by the operation signal correspondence system 402b.

  Next, the power supply system will be described. A commercial AC power source taken in from a plug 551 connected to an outlet is input to the power output circuit 500 as a DC power source (for example, 12V / 3A) via the AC adapter 552. Further, the power output circuit 500 can take in power from the battery 553. The power output circuit 500 converts the voltage from the AC adapter 552 or the battery 553 by the DC / DC converter 501 to generate various values of DC voltage (for example, 5V, 3.3V, 1.8V). Can do. Alternatively, when the AC adapter 552 is not used, the power output circuit 500 rectifies power from the AC commercial power source.

  The power output circuit 500 can switch the power use state of the television receiver to a commercial power use state and a battery power use state under the control of the power control system 402. This power use state can be switched by the switch 502 being controlled by the power control system 402.

  A transmitter / receiver 460 is connected to the control block 400. The transceiver 460 includes a short-range wireless communication device 461. The short-range wireless communication device 461 can communicate with a mobile terminal (not shown) via the antenna 462. Furthermore, the transceiver 460 includes a network communicator 463. The network communication device 463 is connected to the network 610 and can communicate with the server 611.

  FIG. 2 shows various operation buttons of the remote controller 700. Reference numeral 711 denotes a power button for turning on / off the power of the television receiver. By repeatedly operating the power button 711, the television receiver can be repeatedly turned on and off.

  A power indicator lamp 302 is provided below the frame of the display 300. When the power is off, when the power button (not shown) of the manual operation unit 456 or the power button 711 of the remote controller 700 is pressed, the display lamp 302 is lit in green. When the power indicator lamp 302 is lit in green, it indicates that the power is on, program guide information is being acquired, and software is being downloaded. In this state, when the power button of the manual operation unit 456 or the power button 711 of the remote controller 700 is pressed, the display lamp 302 is lit red. When the power indicator lamp 302 is lit in red, the power is off (standby state), and the battery 533 is fully charged. When the battery 533 is being charged, the power display lamp 302 is lit in orange. When the power plug 551 is removed or when the power is turned off when the battery 533 is used, the power display lamp 302 is turned off.

  The sub-MPU 402 and the remote control signal receiver 455 described with reference to FIG. 1 operate in the power output circuit even when the power of the television receiver is turned off by the power button of the manual operation unit 456 or the power button 711 of the remote controller 700. Auxiliary power from 500 is supplied, and an operation signal from the remote controller 700 can be received.

  The input switching button 712 is a button for switching between an input capturing state and a non-capturing state from an external device connected to the television receiver. For example, when the input switching button 712 is repeatedly pressed, the state changes from digital broadcast reception state → signal capture state from HDMI 205 → video input state → D terminal (not shown in FIG. 1) input state → digital broadcast reception state.

  The peak shift button 721 can be used to cooperate in reducing power consumption from the power supply source (the power supply plant of the power company). When the peak shift button 721 is operated, the television receiver is switched between a commercial power supply usage state and a built-in battery 553 usage state. Therefore, every time the peak shift button 721 is pressed, the power supply from the power plug 551 and the battery 533 is switched. Reducing peak power demand by switching to battery-powered operation by pressing the peak shift button 721 during times when there is a possibility that the power demand will increase during midsummer daytime, etc. Can do. When the battery 553 is used in this way, it can contribute to avoiding the peak of social power consumption. Alternatively, the server 611 may issue a drive switching command during a time period in which the power demand may exceed the supplied power amount, and the commercial power supply driving and the battery driving may be automatically switched. Even if the mode is automatically switched to battery driving, the commercial power source driving mode can be restored by pressing the peak shift button 721 again.

  When the peak shift button 721 is pressed while the power is off, the battery 533 operates.

  In order to watch television using the battery 533, the battery 533 must be charged. When the power indicator lamp 302 is lit in orange, the battery 533 is being charged and cannot be used.

  When the power plug 551 is connected to the outlet, charging of the battery 533 starts, and the power display lamp 302 is lit in orange. When charging is completed, the power indicator lamp 302 turns red. In a state near full charge, charging does not start, and the power indicator lamp 302 lights red. When the power is on (the power indicator lamp 302 is lit in green), the battery is not charged. However, the television receiver has a specification that charging is not performed during program viewing. That is, the power output circuit 500 has a function of charging the battery 553 from a commercial power supply, but prohibits the charging operation when the television receiver is in the program display operation state.

  The battery 533 is not charged at any time, but when it is in a standby state in the night time zone (for example, the time zone from 9 o'clock in the evening to 9 o'clock in the morning) when the amount of power used is small compared to the daytime. In addition, timer control may be performed under the control of the control block 400. In this way, it is possible to reduce the peak amount of power used and to save power charges. For example, the television receiver can display a menu related to charging. In this menu display item, an item for setting the charging time is prepared. When the user operates the remote controller 700 to select a desired time zone and operates the enter button 741, charging the battery is performed in the desired time zone on the condition that no power failure occurs.

  In addition, the power supply of the antenna booster 102 may be stopped during a power failure and broadcasting may not be seen, but switching to the indoor antenna 105 enables one-segment reception even during a power failure. For example, this television receiver is aimed to be able to be driven by a battery for about 3 hours in accordance with the maximum time of a planned power outage. When switching to battery driving so as to ensure the battery driving time, the brightness of the screen may be lowered in order to reduce power consumption. Alternatively, the battery driving time may be set in advance, and the amount of power consumption to be reduced may be varied according to the remaining battery driving time and the remaining battery power.

  Various measures can be taken as a power failure detection method. For example, a backup capacitor is connected to the power supply control system 402a so that it can operate for a predetermined time even if a power failure occurs. Therefore, it is possible to detect voltage fluctuation of the power supply line, output detection of the AC adapter, and the like.

  FIG. 3A shows an example of a guidance screen when the commercial power supply usage state is switched to the battery usage state. When the battery is switched to the power usage state at the time of a power failure, the power supply to the booster 102 of the external antenna is also stopped, so there is a possibility that images cannot be viewed. In order to eliminate the possibility that the user will misunderstand that the television receiver is malfunctioning, in this case, for example, “This unit is currently using the battery. The unit will shift to the 1Seg reception state. You may display guidance comments 311 such as “Use internal antenna.” The internal antenna may be referred to as an attached antenna or a one-segment antenna.

  FIG. 3B shows an example of an icon 312 displayed on the screen of the television receiver when using commercial power. When the commercial power supply is in use, for example, a plug icon 312 is displayed at the corner of the screen.

  FIG. 3C shows an example of an icon 313 displayed on the screen of the television receiver when the battery is used. When the battery is in use, the battery mark icon also displays the remaining battery level (the number of diagonal lines corresponds to the remaining battery level). The form of the icon is not limited to the form shown in the figure, and various other modifications are possible as long as the type of power source can be identified, and a banner or the like including characters may be used. Furthermore, not only the icon displayed on the screen but also the use of the commercial power source or the battery may be identified by the color of the light emitting unit such as an LED provided on the frame of the display device 300.

  The power saving button 722 can switch on / off the power saving state (or power saving mode) of the television receiver. When the power saving button 722 is operated and the power saving mode is turned on, in order to ensure a long driving time of the battery 553, for example, the television receiver becomes darker and the power saving state is set. Then, the value of the image quality parameter is changed so as to realize power saving, and a power saving state is entered. When the power saving button 722 is operated again in the power saving state, the power saving mode is turned off and the screen brightness returns to the standard brightness. Power saving not only reduces the screen brightness, but also reduces the size of the image, turns off the image quality improvement processor 201a, turns off the interface control system 401a, and uses headphones instead of speaker output. Various elements that can reduce power consumption are included.

  When the button 723 of terrestrial digital (abbreviation of terrestrial digital broadcasting) is operated, a full segment reception state is set. When the one-segment button 724 is operated, a one-segment reception state is set. The indoor antenna 105 described with reference to FIG. 1 is used according to the full segment reception state and the one segment reception state. Since the one segment reception state consumes less power than the full segment reception state, the power consumption can be reduced even when the full segment reception state is automatically switched to the one segment reception state when the power saving button 722 is pressed. Further, since the monaural output of the audio output has lower power consumption than the stereo output, the power consumption can be reduced even when the stereo output state is automatically switched to the monaural output state when the power saving button 722 is pressed.

  The usage state of the UHF antenna 101 and the indoor antenna 105 may be automatically switched in the switch circuit of the antenna connection board 108. The button 1-12 is a channel selection button group 730. The button 726 is for adjusting the volume. When the + side is pressed, the volume increases, and when the-side is pressed, the volume decreases. The button 727 is for channel switching. When the upper side (on the drawing) of the button is pressed, the reception channel changes in a direction in which the channel number increases, and when the lower side (on the drawing) of the button is pressed, the channel number decreases. The receiving channel changes.

  The button 731 is used for temporarily displaying detailed information such as a broadcasting station name, a program name, a channel number, a one segment or a full segment, and an audio type (monaural or stereo) of the currently received channel. . The button 732 is used to stop the sound output (so-called mute). The button 733 is used to display a quick menu (so-called simple menu). When the quick menu button 733 is pressed, video setting items, audio setting items, energy saving setting items, reception function setting items, and the like are displayed. When the user selects a desired item by moving the cursor and presses an enter button (not shown), the detailed items set in the selected item are displayed.

  The buttons 74L, 74R, 74U, and 74D are buttons that can move the cursor. When each button is operated, the cursor can be moved left, right, up, and down on the screen. A button 741 is a button operated when making a decision.

  The button 745 is an operation button for displaying a video menu, and the button 746 is an operation button for displaying a program guide. The button 747 is an operation button for returning to the previous operation state in the operation progress. The button 747 is an operation button for ending the current mode.

  Some buttons of the remote controller 700 such as a peak shift button 721, a power saving button 722, a volume adjustment button 726, and a channel switching button 727 are also arranged in the manual operation unit 456.

  FIG. 4 is a typical flowchart showing an example of the operation of the television receiver of FIG. When the plug 551 is connected to the outlet, it is determined in block B102 whether the power of the television receiver is turned on by the power button of the manual operation unit 456 or the power button 711 of the remote controller 700. When the power is turned on, the operation in the normal mode is performed in block B103. In the normal mode, a commercial power supply is used, and the full segment reception circuit 112 sets the full segment reception state. The image quality improvement processor 201a is turned on, the HDMI interface control system 401a is turned on, and the audio signal is a speaker (not shown). Is output. The normal mode is a state that does not consider power saving, and other elements are also set to a state that does not consider power saving. In block B103, not only the normal mode but also the operation of the mode set immediately before the previous power-off may be performed. For this purpose, when the power is turned off, the mode information set immediately before is stored in the RAM 451, and the mode is set based on this information in block B103.

  In block B104, it is determined whether the peak shift button (not shown) of the manual operation unit 456 or the peak shift button 721 of the remote controller 700 is turned on. Each time the peak shift button is turned on, the battery drive mode is switched on and off. That is, when the peak shift button is turned on in the commercial power supply drive mode, the mode is switched to the battery drive mode. When the peak shift button is turned on in the battery drive mode, the mode is switched to the commercial power supply drive mode.

  In block B106, it is determined whether or not the battery is being driven. If the battery is already being driven, the use state of the battery 533 is switched from the use state of the battery 533 to the use state of the AC adapter 552 in block B120. A plug icon is displayed in block B122 (see FIG. 3B). Thereafter, normal operation is performed in block B124.

  When it is detected in block B106 that the commercial power supply is being driven, the use state of the AC adapter 552 is switched from the use state of the AC adapter 552 to the use state of the battery 533 in block B107. For this reason, since the electric power from the electric power supply company via a commercial power supply is not consumed, the electric power used at the peak time of demand can be reduced. Furthermore, even when a commercial power source cannot be used, such as during a planned power outage, by pressing the peak shift button, it is possible to switch to battery driving and to watch a TV program. A battery icon is displayed in block B108 (see FIG. 3C).

  A power saving operation is performed in block B110. An example of details of the power saving operation is shown in FIG.

  In block B112, the remaining battery level is monitored to determine whether or not the battery level has decreased. When the amount is reduced by a certain amount, the remaining amount display is updated in block B114 (one diagonal line in FIG. 3C is deleted).

  In block B116, it is determined whether the remaining battery level is equal to or less than a threshold value (eg, 7V). If not, the power saving level is increased by one step in block B118, and the process returns to block B110. In the following cases, the battery cannot be driven, so that block B120 is executed in order to use the commercial power supply.

  FIG. 5 shows an example of details of the power saving operation of block B110 in FIG. The power saving operation includes a plurality of power saving elements, and which element can save power can be determined in advance by user settings. The initial setting is to save power in all elements. In the user setting, a power saving element can be selected from a menu. Here, for convenience of explanation, a maximum of five power saving elements can be set: (1) screen brightness, (2) video size, (3) high image quality processing, (4) HDMI link, and (5) audio output. Suppose that It is determined whether or not each element is set, and power saving processing is performed according to the set power saving element. In addition to these, the power saving element may include a one-segment reception state and a monaural sound output state.

  It is determined whether or not the luminance is set in block B222. If it is set, the illuminance of the backlight is reduced in block B224. Thereby, the power consumption of a backlight can be reduced. Details of the illuminance reduction operation will be described later.

  In block B226, it is determined whether the video size is set. If it is set, the size of the video displayed in block B228 is reduced. This can also reduce power consumption. Details of the video size reduction operation will be described later.

  In block B230, it is determined whether image quality enhancement processing is set. If it has been set, the image quality improvement processor 201a is turned off in block B232. Thereby, the power consumption of the image quality improving processor 201a can be reduced.

  In block B234, it is determined whether an HDMI link is set. If set, the interface control system 401a is turned off to turn off the HDMI link in block B236. Thereby, the power consumption of the interface control system 401a can be reduced.

  In block B238, it is determined whether audio output is set. If set, the audio output is switched to the headphone output in block B240. Thereby, the power consumption regarding an audio | voice output can be reduced.

  Next, the size reduction of the display image of the block B228 will be described. FIG. 6A shows an example of a normal mode image. In order to save power, the display area can be set to an area smaller than the full screen, for example, the central area ((B) of FIG. 6). In this case, since the screen becomes small, it is not always necessary to be in the full segment reception state, and may be automatically switched to the one segment reception state.

  Here, if the same region is always used, the difference in use time between the display pixels in the region of the image 320 with high luminance and the display pixels in the portion with low luminance around the image 320 or the image 320 with high brightness. A difference in the usage time of the backlight element in the region of the above and the backlight element in the low brightness area around the image 320 occurs. As a result, a noticeable line may occur at the boundary between the area that is always used for image display and the area that is not used. Therefore, this television receiver can move the display position of the image 320 as shown in, for example, (B), (C), and (D) of FIG. Various embodiments are possible, such as the time when the display position of the image 320 is moved, for example, when a commercial starts, when a certain time has passed, and when these are combined.

  Furthermore, for the purpose of power saving, the area (size) of the image 320 area to be displayed can be set ((E) in FIG. 6).

  7A and 7B show configuration examples of the edge-type backlight unit of the display 300 that can change the display area. The display device 300 includes a light guide plate 331, a horizontal light source 332 is disposed to face the vertical thickness surface of the light guide plate 331, and a vertical light source 333 is disposed to face the horizontal thickness surface. ing. Light emitted from each of the light sources 332 and 333 is reflected in the light guide plate 331 and output toward the front surface of the light guide plate 331, and functions as a backlight. As a light source element, for example, a plurality of light emitting elements (LEDs) are used. Light emitted from the light sources 332 and 333 is diffused in the light guide plate 331 so as to be output as uniform light toward the front surface.

  The horizontal light source 332 and the vertical light source 333 have, for example, their eight emission sources H1-H8 and V1-V8, and the respective emission sources can be controlled on and off. Therefore, for example, when the emission sources H1 and H8 and V1 and V8 are turned off, the area around the light guide plate 331 can be darkened. Although the boundary between the dark area and the bright area is not clear, it is possible to control the backlight area.

  Therefore, when displaying the image 320 in the region as described in FIGS. 6B to 6E, the signal processor outputs the signal around the image 320 as an image having a luminance level of zero. As described above, when the image 320 in the area as described in FIGS. 6B to 6E is displayed, the lighting area of the backlight can be controlled, and further power saving can be performed.

  FIGS. 8A and 8B show another configuration example of the direct-type backlight unit of the display 300 that can change the display area. In this display 300, a substrate 342 in which light emitting elements (LEDs) are two-dimensionally arranged is disposed on the back side of a glass substrate 341. Each light emitting element can be controlled to be turned on / off in an arbitrary number of units. Therefore, the region of the light emitting element to be lit can be selectively varied by a backlight drive circuit (not shown). A light diffusion layer is formed on the back side of the glass substrate 341, and is devised so that the light emitted to the outside is uniform. Accordingly, the glass substrate 341 viewed from the entire surface by the light of the backlight does not necessarily clarify the boundary between the dark region and the bright region, but the backlight region can be controlled.

  Therefore, when displaying the image 320 in the region as described in FIGS. 6B to 6E, the signal processor outputs the signal around the image 320 as an image having a luminance level of zero. As described above, when the image 320 in the area as described in FIGS. 6B to 6E is displayed, the lighting area of the backlight can be controlled, and further power saving can be performed.

  Note that the backlight system of the display device 300 is not limited to the above-described configuration, and may be one using a plurality of fluorescent tubes, for example. Further, the number of divisions of the display area is not limited to the above description. Various design changes can be made to the number of divisions of the display area by the same method as described above.

  Next, the reduction in the illuminance of the backlight of the block B224 will be described. In the example of FIG. 6, the lighting area of the backlight is reduced as the video size is reduced, and as a result, the power consumption of the backlight is reduced. However, in order to save power, the image size may be a full size and the intensity of the backlight may be controlled. That is, by reducing the overall brightness, power consumption can be reduced and a power saving effect can be obtained. In block B224, the video size is displayed on the full screen, and only the backlight is partially turned off. When reducing the illumination intensity of the backlight, it is not always necessary to be in the full segment reception state, and may be switched to the one segment reception state.

  9A and 9B are for thinning the backlight. The example of FIG. 9A repeats lighting (solid line) and extinguishing (dashed line) for each backlight control unit of the horizontal line, and halves the backlight illuminance. In the case of the edge type backlight shown in FIG. 7, the emission patterns shown in FIG. 9A are realized by turning on the emission sources H1, H3, H5, and H7 and turning off the emission sources H2, H4, H6, and H8. it can. In the case of the direct type backlight shown in FIG. 8, the light emission pattern shown in FIG. 9A can be realized by turning on only the light emitting elements directly below the horizontal line to be emitted.

  In the example of FIG. 9B, lighting (solid hatching) and lighting (blank) are repeated for each backlight control unit in the horizontal and vertical directions, and the illuminance of the backlight is halved. In the case of the edge type backlight of FIG. 7, the emission sources H1, H3, H5, H7, V1, V3, V5, V7 are turned on, and the emission sources H2, H4, H6, H8, V2, V4, V6, V8 are turned on. By turning off, the light emission pattern shown in FIG. 9B can be realized. In the case of the direct backlight shown in FIG. 8, the light emission pattern shown in FIG. 9B can be realized by turning on only the light emitting elements directly below the horizontal line to be emitted.

  9A and 9B, the thinning rate is 50%, but the thinning rate is not limited to this, and can be arbitrarily set according to the power saving effect desired to be achieved.

  FIG. 9C shows an example in which the illuminance of each light source of the backlight is reduced. A one-dot chain line indicates that the illuminance is reduced. The reduction rate is not limited to half, and an arbitrary reduction rate can be set.

  According to (A) to (C) of FIG. 9, the video is displayed on a full screen, but the power consumption can be reduced at an arbitrary ratio by reducing the illuminance of the backlight.

  FIG. 9D shows an example in which the light emission region of the backlight is limited to the center portion. Since the central part of the video is often important, there is often no problem in viewing the program even if the illumination intensity of the backlight in the peripheral part is reduced.

  9A and 9B or the illuminance variable control of the light source of FIG. 9C and the light emission area control of FIG. 9D may be combined.

  In recent years when the size of the display device 300 is increasing, saving power consumption of the display is an effective measure from the viewpoint of power saving of the entire society. In addition, a power saving effect can be obtained even if the television receiving apparatus simply switches to the one-segment reception state.

  This television receiver can operate as described above. The television receiving apparatus can obtain various combinations of the above-described operations according to the application provided with the control block 400.

  In the one-segment reception state, the control block 400 can set the display to which the output video signal of the signal processor 200 is supplied to an image display state in the full screen area. In another aspect, in the one-segment reception state, the control block 400 puts the display to which the output video signal of the signal processor 200 is supplied into an image display state in a partial area of the screen, and one of the backlights. The partial area can be turned off. In yet another aspect, in the one-segment reception state, the control block 400 changes the display to which the output video signal of the signal processor 200 is supplied from the image display state in the entire screen area, so that the remaining amount of the battery is predetermined. When the value is reduced, the image display state in a partial area of the screen and the partial area of the backlight can be turned off. In another aspect, in the one-segment reception state, the control block 400 sets the display to which the output video signal of the signal processor 200 is supplied to the image display state of the entire screen area, and the screen of the display unit. The image display state of the partial area and the partial area of the backlight can be turned off, and one of the image display states is set in response to the selection signal input based on the operation of the viewer Can do. In addition, a comment that prompts the viewer to operate the viewer can be displayed on the display.

  In yet another aspect, the tuner 110 can receive a broadcast signal from an external antenna and the power output circuit 500 can supply power to the booster 102 of the external antenna 101 when the state transitions to the one-segment reception state. In another aspect, when a transition to the one-segment reception state is made, the tuner 110 can input a broadcast signal from the external antenna 101, and the power output circuit 500 can stop the power supply to the booster 102 of the external antenna. In another aspect, when the state shifts to the one-segment reception state, the input to the tuner switches the broadcast signal from the attached antenna to the input, and the power output circuit 500 stops the power supply to the booster 102 of the external antenna. Can do. At this time, the antenna may be switched automatically, or a comment that prompts the viewer to switch the antenna may be displayed on the display.

  In another embodiment, the size of the display area of the image 320 described with reference to FIGS. 6A to 6E can be changed in accordance with the remaining battery level or the operation of the viewer. Alternatively, the audio output circuit can be turned off by using the video output to save power, or the video output can be stopped by using the audio to save power.

  FIG. 10 shows an example of a menu for performing various settings of the television receiver. When the quick menu button 733 (see FIG. 2) of the remote controller 700 is operated, a menu is displayed on the display device 300. The items of this menu are “video setting”, “audio setting”, “energy saving setting”, “receiver”. There is an item “Setting”. Here, the viewer can operate the button 74U or the button 74D, move the cursor, and select a desired item. Now, when the viewer selects the “energy saving setting” item 331 with the cursor and presses the enter button 741, a menu of the next layer is displayed. This menu includes items such as “program information acquisition setting”, “no operation automatic power off”, “on-air no signal off”, “external input no signal off”, and “night charge”. When the cursor is moved to each item, an on / off button for turning the item on or off is displayed.

  For example, when the cursor is moved to “program information acquisition setting”, an on / off button is displayed at the same time. Here, when the viewer operates the button 74U or the button 74D, selects “ON” and presses the OK button 741, a function of acquiring program information of digital broadcasting when the power is off (in a standby state). However, if “OFF” is selected and the OK button 741 is pressed, the program information is set not to be acquired.

  Next, when the cursor is moved to “no operation automatic power off”, an on / off button is displayed at the same time. Here, when the viewer operates the button 74U or the button 74D, selects “ON” and presses the OK button 741, the power is turned off when the television receiver is not operated for about 3 hours, and the standby state. It becomes. When “OFF” is selected, the power remains on even if the no-operation state lasts for about 3 hours.

  Next, when the cursor is moved to “on air no signal off”, an on / off button is displayed at the same time. Here, when the viewer operates the button 74U or the button 74D, selects “ON” and presses the OK button 741, when the broadcast is received, if no signal state continues for about 15 minutes, the power is turned off and the standby state is established. It becomes. When “OFF” is selected, the power supply remains on even if the no-signal state continues.

  Next, when the cursor is moved to “No external input signal off”, an on / off button is displayed at the same time. Here, when the viewer operates the button 74U or the button 74D, selects “ON” and presses the OK button 741, when the external signal is selected and the no-signal state continues for about 15 minutes, the power is turned off and the standby state is established. It becomes. When “OFF” is selected, the power supply remains on even if the no-signal state continues.

  Next, when the cursor is moved to “night charge”, an on / off button is displayed at the same time. Here, when the viewer operates the button 74U or the button 74D, selects “ON” and presses the OK button 741, for example, the battery is automatically charged between 10 o'clock in the evening and 9 o'clock in the morning. (However, when the device is in standby). When “OFF” is selected, the battery is charged when the apparatus is turned off and in a standby state.

  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. Further, 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, you may combine suitably the component covering different embodiment.

  DESCRIPTION OF SYMBOLS 101 ... UHF antenna, 102 ... Booster, 110 ... Tuner, 111 ... Full segment receiving circuit, 112 ... One segment receiving circuit, 200 ... Signal processor, 201 ... Video signal processing circuit, 201a ... High image quality processor, 300 ... Display 302 ... Power indicator lamp 400 ... Control block 401 ... Main MPU 402 ... Sub MPU 455 ... Remote control signal receiver 456 ... Manual operation unit 500 ... Power output circuit 552 ... AC adapter 553 ... Battery 700 ... Remote controller.

Claims (9)

A television receiver that can be driven by a battery,
A receiver for receiving a mode switching signal;
The television receiver is switched from the commercial power drive mode to the battery drive mode in response to the mode switching signal received by the receiver while the commercial power is being driven . The television receiver is received by the receiver while the battery is being driven. a switching Ru switching means to a commercial power supply drive mode from the battery operation mode according to the mode switching signal,
A power supply controller that reduces power consumption in the battery drive mode than in the commercial power supply drive mode,
The power supply controller performs one or a plurality of power saving operations selected by a user, and the power saving operations include a backlight illuminance reduction or a video size reduction .   A second receiving unit for receiving the power saving signal;
  The television receiver according to claim 1, wherein the power controller further reduces power consumption when receiving the power saving signal in a battery drive mode. The television receiver according to claim 1, wherein the power supply controller turns off the backlight of the display unit for each row or every plurality of rows in the battery drive mode. The television receiver according to claim 1, wherein the power supply controller partially turns off the backlight of the display unit in the battery drive mode. The television receiver according to claim 4, wherein the power controller reduces a size of a video signal displayed on the display unit in accordance with a region where the backlight is partially turned off. The television receiver according to claim 1, wherein the power supply controller is configured to turn off the image quality improvement processing unit in the battery drive mode. A terminal of the predetermined standard to which an external device is connected via an interface cable of the predetermined standard;
An inquiry unit for determining whether or not the interface cable is connected to the terminal;
The television receiver according to claim 1, further comprising means for turning off the inquiry unit in a battery drive mode. A headphone terminal,
2. The television receiver according to claim 1, further comprising means for outputting an audio signal to the headphone terminal in the battery driving mode.   The television receiver according to claim 1, wherein the mode switching signal is transmitted from a remote controller.

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