JP2006261785A - Consumed electrical energy control apparatus, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a consumed electrical energy control apparatus and an electronic apparatus, capable of surely reducing the electrical energy consumed in a video display apparatus, while taking into account the environment surrounding the video display apparatus and the contents of a broadcast program. <P>SOLUTION: The video display apparatus DIS, when carrying out display of a broadcast program or the like particularizes the attribute of the broadcast program, such as (1) the broadcast type of a broadcast service (e.g. television broadcast, such as HD broadcast and SD broadcast, or data broadcast and radio broadcast), and (2) a genre of the broadcast program (e.g. movie, sports), and uses sensors to detect (3) a state of a user (e.g. the sight line of the user, the presence of the user, and zapping state or the like) so as to change a display size of an image depending on the detected state of the user, thereby reducing power consumption. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present application relates to a display control technique for a display panel such as a PDP (Plasma Display Panel), an organic EL (Electro Luminescent) panel, and a liquid crystal display panel.

In recent years, a display panel (for example, a PDP or a liquid crystal panel) mounted on a video display device is becoming larger due to a market demand for enjoying contents such as movies on a large screen. Such an increase in the size of the display panel is a factor that greatly increases the power consumption in the video display device, and there is an urgent need to reduce the power consumption in the video display device equipped with the large display panel. From this point of view, conventionally, when a viewer detects whether or not there is a viewer near the video display device and there is no viewer near the video display device, the display is shifted to the low power consumption mode and displayed. A video display device provided with a function of reducing power consumption by automatically reducing the luminance of an image has also been proposed (see Patent Document 1).
JP 2002-218343 A

  By the way, in the conventional video display device, since the switching to the low power consumption mode is performed based only on the presence or absence of the user in the vicinity of the video display device, there is actually an environment where power consumption should be reduced. Nevertheless, there have been cases where power consumption cannot be reduced. For example, when a user is reading a magazine in the vicinity of the video display device, or when the user is asleep, the user is actually in an environment to shift to the low power consumption mode. It is impossible to switch to the low power consumption mode. Further, for example, various broadcast programs (for example, HD broadcast (high-definition broadcast) and SD broadcast (normal broadcast)) are included in the broadcast wave received by the video display device. If it becomes possible to switch to the low power consumption mode according to the above, the contribution to power saving will be significant.

  The present invention has been made in view of the circumstances described above. As an example of the problem, the power consumption in the video display device is surely taken into account while taking into account the attributes of the broadcast program and the surrounding environment of the video display device. Power consumption control device, electronic device, power consumption control method, and power consumption control program are provided.

  In order to solve the above-described problem, in one aspect of the present application, a power consumption control device according to claim 1 controls power consumption in a playback device that plays back input content data and outputs video and audio. A power consumption control device for detecting at least one of (a) a user's eye state and (b) a distance from the user to the playback device, and detection by the detection unit And a control means for controlling the amount of power consumption in the playback device based on the result.

  In another aspect of the present application, the power consumption amount control device according to claim 5 controls the power consumption amount in a playback device that reproduces input content data and outputs video and audio. A control device comprising control means for controlling power consumption in the playback device when a user performs an input operation more than a predetermined number of times within a predetermined time.

  Furthermore, in another aspect of the present application, the power consumption control device according to claim 7 controls power consumption in a playback device that plays back the input content data and outputs video and audio. An amount control device, comprising: detection means for detecting an attribute of content data input to the playback device; and control means for controlling power consumption in the playback device according to a detection result in the detection means. It is characterized by that.

  Furthermore, in another aspect of the present application, the power consumption control device according to claim 12 controls power consumption in a playback device that reproduces input content data and outputs video and audio. A control device that sets a period and an upper limit value of the electric energy allowed to be consumed within the period according to a user's input operation; an electric energy set by the setting means; And control means for controlling power consumption in the playback apparatus according to the period.

  Furthermore, in another aspect of the present application, the electronic device according to claim 17 is an electronic device that outputs video and audio based on input content data, and includes (a) a state of eyes of a user and (b). Detection means for detecting at least one of the distance from the user to the playback device, and control means for controlling power consumption in the electronic device based on a detection result in the detection means. Features.

  In another aspect of the present application, the electronic device according to claim 18 is an electronic device that outputs video and audio based on input content data, and a user performs an input operation more than a predetermined number of times within a predetermined time. And a control means for controlling the amount of power consumption in the electronic device.

  Still further, in another aspect of the present application, the electronic device according to claim 19 is an electronic device that outputs video and audio based on input content data, and detects detection of an attribute of the input content data. Means and control means for controlling the amount of power consumption in the electronic device in accordance with the detection result of the detection means.

  Furthermore, in another aspect of the present application, the electronic device according to claim 20 is an electronic device that outputs video and audio based on input content data, and the period and the period within the period according to a user input operation. Setting means for setting an upper limit value of the amount of power allowed to be consumed by the power supply, and control means for controlling the power consumption amount in the electronic device according to the power amount and period set by the setting means. It is characterized by providing.

  Furthermore, in another aspect of the present application, the power consumption control method according to claim 21 is a power consumption control method for controlling power consumption in a playback device that plays back input content data and outputs video and audio. A detection method for detecting at least one of (a) a state of an eye of a user and (b) a distance from the user to the playback device, and a detection result in the detection step And a control step for controlling the amount of power consumption in the playback device.

  In another aspect of the present application, the power consumption control method according to claim 22 is a power consumption amount for controlling power consumption amount in a playback device that reproduces input content data and outputs video and audio. A control method comprising a control step of controlling power consumption in the playback apparatus when a user performs an input operation more than a predetermined number of times within a predetermined time.

  In still another aspect of the present application, the power consumption control method according to claim 23 is a power consumption control method for controlling power consumption in a playback device that plays back input content data and outputs video and audio. An amount control method, comprising: a detection step of detecting an attribute of content data input to the playback device; and a control step of controlling power consumption in the playback device according to a detection result in the detection step. It is characterized by that.

  Furthermore, in another aspect of the present application, the power consumption amount control method according to claim 24 is the power consumption amount for controlling the power consumption amount in a playback apparatus that reproduces input content data and outputs video and audio. A control method that sets a period and an upper limit value of the electric energy allowed to be consumed within the period according to a user's input operation, and an electric energy set by the setting step, And a control step for controlling power consumption in the playback apparatus according to a period.

Furthermore, in another aspect of the present application, the power consumption control program according to claim 25 is for controlling the power consumption in a playback device that reproduces input content data and outputs video and audio by a computer. A power consumption control program comprising: (a) a user's eye condition; and (b) a distance from the user to the playback device;
And a control means for controlling the power consumption amount in the reproducing apparatus based on a detection result in the detection means.

  In another aspect of the present application, the power consumption control program according to claim 26 is a program for controlling the power consumption in a playback device that reproduces input content data and outputs video and audio by a computer. A power amount control program, wherein the computer is caused to function as a control unit that controls power consumption in the playback device when a user performs an input operation more than a predetermined number of times within a predetermined time. .

  Furthermore, in another aspect of the present application, the power consumption control program according to claim 27 is provided for controlling the power consumption in a playback device that reproduces input content data and outputs video and audio by a computer. A power consumption control program, wherein the computer detects a property of content data input to the playback device, and controls to control power consumption in the playback device according to a detection result in the detection unit It is made to function as a means.

  Furthermore, in another aspect of the present application, the power consumption control program according to claim 28 is a consumption for controlling the power consumption in a playback device that reproduces input content data and outputs video and audio by a computer. A power amount control program, which is set by a setting unit that sets a period and an upper limit value of the power amount permitted to be consumed within the period in accordance with a user's input operation. It is characterized by functioning as control means for controlling the amount of power consumed by the playback device in accordance with the amount of power and the period.

  Hereinafter, embodiments of the present application will be described with reference to the drawings. In the following embodiments, for example, the display control device of the present application is applied to a video display device equipped with a PDP driven by the subfield method. However, this embodiment is merely an example of the present application, and the display control apparatus of the present application is applicable to all video display apparatuses equipped with a display panel driven in another form such as a liquid crystal panel. is there. The “subfield method” here divides one field of a video signal into N subfields and emits a PDP for each subfield to display a video corresponding to one field. Means the way. Further, in the following description, “broadcast program” indicates content provided from each broadcast station via a broadcast wave, analog signal indicating the content of the content modulated by the broadcast wave is “TV signal”, and The data obtained by converting the “TV signal” into a digital format and the digital data broadcast by the broadcast wave are referred to as “content data”.

[1] First Embodiment [1.1] Configuration of the First Embodiment First, the outline of the present embodiment will be described with reference to FIG. 1 which is a block diagram showing the configuration of the video display device DIS. As shown in the figure, a video display device DIS according to the present embodiment includes a tuner 1, a video processing unit 2, a panel driving unit 3, a PDP 4, an audio processing unit 5, an amplifier unit 6, and an operation unit 7. A surrounding environment detection unit 8, a user situation analysis unit 9, a ROM / RAM 10, a system control unit 11, and a bus 12 that interconnects these elements. The video display device DIS receives a broadcast wave such as terrestrial analog broadcast in the tuner 1 and displays a video corresponding to the broadcast program on the PDP 4 based on a TV signal or content data included in the broadcast wave. Sound corresponding to the TV signal and content data is output from the speaker SP.

  Here, as a characteristic matter in the present embodiment, the video display device DIS, when displaying a broadcast program or the like, (1) a broadcast type of a broadcast service (for example, a television broadcast such as HD broadcast or SD broadcast, or The display state of the image is changed according to the attributes of the broadcast program such as (broadcast mode such as data broadcast and radio broadcast) and (2) the genre of the broadcast program (for example, the program genre such as movie, sports and news) The power consumption is reduced. This video display device DIS detects not only the attributes of the broadcast program but also (3) the user's situation (for example, the user's line of sight, the user's presence situation, the zapping situation, etc.) by the sensor. A method for changing the display state of the image according to the user's situation and thereby reducing the power consumption is also used.

  Hereinafter, a specific configuration of the video display device DIS according to the present embodiment for realizing such a function will be described.

  First, like the conventional PDP, the PDP 4 is provided with column electrodes Dk (k = 1, 2,..., M) in the vertical direction of the display area, and row electrodes Yl (l) in the horizontal direction of the display area. = 1, 2,..., N) and a row electrode Xl. The row electrode Yl and the row electrode Xl are formed in parallel with each other, and a cell CL as a light emitter is formed in a region where one column electrode Dk and one row electrode pair Yl, Xl intersect. Has been. Each cell CL repeats light emission and non-light emission by generating a predetermined wall charge in accordance with signals supplied to the column electrode Dk and the row electrodes Yl and Xl. Various videos are displayed accordingly.

  Next, the tuner 1 is a tuner for analog broadcasting (for example, terrestrial analog broadcasting, BS (Broadcasting Satellite) analog broadcasting, etc.) and digital broadcasting (for example, terrestrial digital broadcasting, CS (Communication Satellite) broadcasting, BS digital broadcasting, etc.). The broadcast wave transmitted from each broadcast station is received via the antenna AT. For example, if the broadcast wave to be received is an analog signal, the TV receiver 11 demodulates the broadcast wave into a TV video signal and an audio signal (that is, a TV signal). While supplying to the processing unit 2 and the system control unit 11, the audio signal is output to the audio processing unit 5 and the system control unit 11. On the other hand, when the broadcast wave to be received is based on a digital system, the TV receiver 11 demultiplexes the transport stream included in the received broadcast wave, and the video data included in the transport stream. The component (for example, MPEG2 (Moving Picture Coding Experts Group 2) format image data) component is output to the video processing unit 2 and the system control unit 11, while the audio data (for example, AAC (Advanced Audio Codec) format or AC-3). The (audio code number 3) format audio data) component is output to the audio processing unit 5 and the system control unit 11.

  The video processing unit 2 performs predetermined signal processing on the signal supplied from the tuner 1. For example, when a video signal corresponding to analog broadcasting is supplied from the tuner 1, the video processing unit 2 performs A / D conversion on the video signal and performs digital data obtained by the A / D conversion. Then, a predetermined format of signal processing (more specifically, error diffusion processing or dither processing) is performed to generate display data SD, and the display data SD is supplied to the frame memory 31 of the panel drive unit 3. . On the other hand, when video data corresponding to digital broadcasting is supplied from the tuner 1, the video processing unit 2 performs predetermined signal processing on the video data to generate display data SD, and performs panel driving. This is supplied to the frame memory 31 of the unit 3.

  The panel drive unit 3 is a circuit for driving the PDP 4 based on the display data SD supplied from the video processing unit 2 and displaying video corresponding to the broadcast program. The panel drive unit 3 includes a frame memory 31 and a drive control unit 32. And a drive unit 33.

  The frame memory 31 is configured by, for example, a VRAM, and temporarily records display data SD supplied from the video processing unit 2 in accordance with a control signal Sc supplied from the drive control unit 32. The display data SD recorded in the frame memory 31 is read for each line according to the read timing signal included in the control signal Sc, and sequentially supplied to the address driver 331 of the drive unit 33.

  The drive control unit 32 generates various signals and supplies them to both elements in order to control the frame memory 31 and the drive unit 33. For example, the drive control unit 32 generates the control signal Sc and supplies it to the frame memory 31, and also generates various drive signals Scd to the address driver 331 of the drive unit 33, the first and second sustain drivers 332 and 333. Supply.

  Next, the drive unit 33 is an element for driving the PDP 4 based on the display data SD supplied from the frame memory 31, and includes an address driver 331, a first sustain driver 332, a second sustain driver 333, Consists of The drive unit 33 is configured to drive the PDP 4 based on the drive signal Scd supplied from the drive control unit 32. During the drive, the drive unit 33 sets the reset period, the address period, and the sustain period to 1. As a sub-field, this is repeated N times, and finally, erase data is applied to all cells to execute main erasing to reset the state in which wall charges are erased, thereby corresponding to display data SD for one field. The video is displayed on the PDP 4. Here, (a) the reset period is a signal application period for generating wall charges in all the cells CL of the PDP 4 based on the drive signal Scd supplied from the drive control unit 32, and (b) The address period is a period in which the wall charge of each cell CL is selectively discharged based on the display data Sd and the light emission state or the non-light emission state of each cell CL is set in the subsequent sustain period. Further, (c) the sustain period is applied to the row electrodes Xl and Yl in order to maintain the sustain pulse (that is, the light emission state of each cell CL) for each cell CL of the PDP 4 based on the drive signal Scd. This means a signal. When the light emission maintenance period is set long in the PDP 4, the user recognizes it as a bright image, and when it is set short, it is recognized as darkly displayed (that is, gradation display is performed). ) Is a period for maintaining the light emission state in each cell CL. Note that the specific driving method of the PDP 4 is the same as the conventional method described in, for example, Japanese Patent Laid-Open No. 2000-23136, and the details are omitted.

  Next, the sound processing unit 5 performs predetermined signal processing on the signal supplied from the tuner 1 and outputs the signal to the amplifier unit 6. For example, when a video signal corresponding to analog broadcasting is supplied from the tuner 1, the audio processing unit 5 outputs the audio signal as it is to the amplifier unit 6, while when audio data corresponding to digital broadcasting is supplied, After performing predetermined signal processing on the audio data, the data is subjected to D / A conversion and output to the amplifier unit 6.

  The amplifier unit 6 amplifies the audio signal supplied from the audio processing unit 5 with a predetermined gain, and supplies the amplified audio signal to the speaker SP. As a result, the sound corresponding to the audio signal (that is, the sound corresponding to the broadcast program) is amplified from the speaker SP.

  Next, the operation unit 7 is configured by a user interface such as a remote control device having various keys such as a selection button and numeric keys, and sends a control signal corresponding to a user input operation to the system control unit 11 and the user situation analysis unit 9. Output.

  The ambient environment detection unit 8 includes various sensors such as an infrared sensor and a camera. The ambient environment detection unit 8 generates the environment data CD indicating the situation around the image display device DIS, and the generated environment data CD is used as the user status analysis unit 9. Output to. In addition, although it is arbitrary about the installation location of these sensors, in this embodiment, since a user's eyes | visual_axis detection etc. are performed as mentioned below, these sensors are placed in the center position of the upper part or lower part of PDP4. It is desirable to provide it.

  The user situation analysis unit 9 analyzes the environment data CD supplied from the surrounding environment detection unit 8 and the control signal supplied from the operation unit 7 to detect the user situation around the video display device DIS. The user situation analyzed by the user situation analysis unit 9 and a specific analysis method are as follows.

< User presence status >
First, the user status analysis unit 9 analyzes the environment data CD to detect the presence status of the user around the video display device DIS. If the user does not exist within the viewable range of the video display device for a certain period of time or longer, it is detected that the user is out of the seat (hereinafter referred to as “out of seat state”). Note that the method for detecting the presence state of the user at this time is arbitrary. For example, an infrared sensor (also referred to as a heat sensor) is used to detect the user's presence, May be detected. When this method is adopted, the sensitivity of the infrared sensor can be determined by the aperture of the sensor and the filter provided in the detection unit of the sensor. For example, whether or not the user exists within a range of several meters can be easily determined. Can be detected. In this case, an image taken by the camera may be used together. When such a method is adopted, for example, it is only necessary to make a dog breed crane whether or not a moving object always exists in a photographed image.

< User gaze status >
Further, the user situation analysis unit 9 detects the direction of the user's line of sight by analyzing the environmental data CD, and if the user has not turned his / her line of sight to the screen for a certain time or longer, the viewer can It is detected that it is in a state where it is not concentrated on (hereinafter referred to as “while watching”). The specific method executed by the user situation analysis unit 9 at this time is arbitrary. For example, the user's presence situation is specified by the above method (for example, using an infrared sensor), and the user situation analysis unit 9 is based on the video on the camera. Further, it may be detected whether or not the user's black eyes are continuously present. In this case, for example, if the presence of black eyes is not detected for 3 to 5 minutes or more, but if the presence of black eyes is detected again immediately thereafter, it is assumed that the user's line of sight is directed and the user May be determined to be “watching while watching” when no gaze is detected for a longer time. Also, for example, the camera image is decomposed into three elements of saturation, lightness, and hue and digitized, and the obtained numerical value is filtered so as to be within a certain range, and the obtained value is converted to a black eye composed of one hue. It is also possible to adopt a method (refer to Japanese Patent Application Laid-Open No. 2004-167051) that returns to the image and obtains the center of the black eye and estimates the direction of the line of sight.

< Dozing situation >
Furthermore, the user situation analysis unit 9 detects whether or not the user's eyes are open by analyzing the environment data CD, and the user closes his eyes for a certain period of time (for example, 5 minutes or more). If it is, the user is detected to be in a dozing state (hereinafter referred to as “sleeping state”). At this time, the user situation detection unit 10 analyzes the camera image included in the environment data CD, detects the position of the viewer's eyes, and specifies whether or not black eyes are present, so that the “sleeping state” is detected. Is supposed to be detected.

< Distance between user and video display device DIS >
Furthermore, the user situation analysis unit 9 detects the distance between the video display device DIS and the user based on the camera video included in the environmental data CD supplied from the operation unit 7 and is within a predetermined distance range (for example, 1 m or less) is detected. The distance detection method is arbitrary. For example, a detection value in an infrared sensor may be set and detection may be performed based on the detection result. Further, a reference image (that is, an image when a user exists at each distance) is recorded in advance in the video display device DIS, and an area ratio in the camera video is compared with the recorded image. Also good. Furthermore, the distance may be predicted according to the focus state of the camera.

< Zapping situation >
Further, the user situation analysis unit 9 detects the switching state of the reception channel (hereinafter, “channel” is abbreviated as “ch”) based on the control signal supplied from the operation unit 7, and the user performs zapping (that is, , A state in which a channel to be viewed while searching for channels is sequentially switched) is detected (hereinafter referred to as a “zapping state”). The user situation analysis unit 9 detects a zapping state by detecting, based on a control signal, that a channel selection operation of a reference number or more has been performed within a certain period of time.

  The user situation analysis unit 9 has a function of managing each situation acquired by the above method. In the video display device DIS according to the present embodiment, the user situation analysis unit 9 corresponds to the user situation managed by the function. The display state is switched. In addition, although the management method of each situation in the user situation analysis part 9 is arbitrary, in this embodiment, it demonstrates as what employ | adopts the following method.

  First, the user situation analysis unit 9 is provided with a memory (not shown) to hold the management table TBL shown in FIG. In this management table TBL, flags corresponding to the states of “off-seat state”, “while looking at”, “sleeping state”, “within a predetermined distance range”, and “zapping state” (specifically, this flag "1" indicates that the current state is present, and "0" indicates that the current state is not present). And when the change of each state is detected in the user situation analysis part 9, the value of a flag is changed in real time. For example, it is assumed that the user takes a bath without turning off the power of the video display device DIS while watching a certain program. In such a case, the user situation analysis unit 9 changes the flag corresponding to “out of seat” in the management table TBL from “0” to “1”. In this way, by changing each flag in the management table TBL in real time, the user's situation around the video display device DIS can be grasped.

  Next, the system control unit 11 is mainly configured by a CPU (Central Processing Unit) and includes various input / output ports such as a key input port, and comprehensively controls the overall function of the video display device DIS. In such control, the system control unit 11 uses control information and various control programs recorded in the ROM / RAM 10 and uses the ROM / RAM 10 as a work area. For example, the system control unit 11 controls the tuner 1 according to the control signal supplied from the operation unit 7 and changes the reception band of the tuner 1 to a frequency corresponding to the broadcast channel selected by the user.

  In addition, as a characteristic feature of the present embodiment, the system control unit 11 controls the video processing unit 2 and the panel driving unit 3, and (1) the broadcast type of the broadcast service, (2) the genre of the broadcast program, (3) The display state is changed according to the user's situation, thereby reducing the power consumption.

  Here, the reduction method of the power consumption in the system control part 11 and these reduction criteria are demonstrated, referring FIG. In FIG. 3, (a) is a diagram showing a display mode changing method according to the broadcast type, (b) is a diagram showing a display mode changing method according to the genre of the broadcast program, and (c) ) Is a diagram showing a method of changing the display form according to the user's situation.

< How to change the display mode according to the broadcast type >
First, based on the signal supplied from the tuner 1, the system control unit 11 broadcast type, more specifically, a program to be received is a TV broadcast (including both HD broadcast and SD broadcast). Whether it is a data broadcast or a digital radio broadcast is specified, and the display size (that is, display area) of the image is varied based on the specified result. For example, when the broadcast program being received is an HD broadcast, it is desirable to display it on the entire screen of the PDP 4. On the other hand, when the broadcast program is an SD broadcast, the number of scanning lines constituting one frame is smaller than that of the HD broadcast. Therefore, there is little need for full screen display. Therefore, in the present embodiment, when displaying a broadcast program video corresponding to HD broadcast, the video is displayed on the entire surface of the PDP 4, while when displaying an image of a broadcast program compatible with SD broadcast, the number of image scanning lines The display is performed with the number of scanning lines as it is without changing. When such a method is adopted, with respect to SD broadcasting, a video is displayed only in an area corresponding to the scanning line on the display screen of the PDP 4 (see FIG. 3A).

  When the broadcast type is data broadcasting, for example, only characters are often displayed, and there is no problem even if the display size is reduced. For example, 2 for the entire display area of the PDP 4 Display is performed by reducing the display area to a display size of about 1 / min. Furthermore, since it is sufficient that only the sound can be output to the digital satellite radio, the image display itself is not performed. In addition to the change in the display size, the video display device DIS according to the present embodiment turns off the power of the drive unit 33 corresponding to the non-display area (that is, the area other than the display area) (more specifically, The drive signal corresponding to the non-display area is not output from the drive control unit 32 at all, and the power supply itself corresponding to the corresponding part such as the address driver 331 is turned off. It is like that.

< How to change the display format according to the broadcast program genre >
Further, the system control unit 11 identifies the genre of the broadcast program based on the signal supplied from the tuner 1 and varies the display size of the image based on the identification result (hereinafter, this function is referred to as “function”). "Program genre display control function").

  In addition, although it is arbitrary about the method of determining what display size is given with respect to what kind of broadcast program, in this embodiment, it demonstrates as what employ | adopts the following method. First, a setting table TBL2 as shown in FIG. 4 is recorded in a memory (not shown) of the system control unit 11. The setting table TBL2 is varied according to the user's arbitrary setting, while the display size is determined using the setting value stored in the setting table TBL2 when determining the display size. By adopting such a method, it is possible to realize a display size change mode that matches the user's preference.

  In addition, the method for specifying the genre of the broadcast program is also arbitrary. For example, the genre of the program may be specified using EPG (Electric Program Guide) data broadcast using broadcast waves. Since information such as the genre of each program is described in the EPG data, the currently-received broadcast channel and the current time may be specified, and EPG data may be searched based on these information. In the case of digital terrestrial broadcasting, information such as the genre of a program is described in the metadata. Therefore, if the metadata is extracted from the currently received transport stream, the genre of the broadcast program is specified. It becomes possible.

  Further, the specific control method of the display size is arbitrary, but in this embodiment, the video processing unit 2 outputs a control signal to the video processing unit 2 so that the video processing unit 2 sets the image size. It is assumed that the display data SD having the reduced size is generated and the panel driving unit 3 drives the PDP 4 based on the display data SD having the reduced size.

< How to change the display mode according to the user's situation >
Further, in the present embodiment, the system control unit 11 performs “outside seat state”, “while looking at”, “sleeping state”, “zapping state”, “predetermined distance range” based on each flag stored in the management table TBL. Each of the “inside” states is specified, and the display size is varied as described below (hereinafter, this function is referred to as “user status display control function”).
(A) When the user is in the “out of seat” state, it cannot be assumed that the user is looking at the display screen, and it is not necessary to display the entire screen of the PDP 4. Reduced display.
(B) When in the “viewing state”, since it is not necessary to display the whole image, the display size is reduced to, for example, a quarter of the display size.
(C) In the “sleeping state”, since it is not necessary to display the whole image, the display size is reduced to, for example, a quarter of the display size.
(D) When in the “zapping state”, the user is likely not paying attention to the detailed contents of the display image, and therefore, the display size is reduced to, for example, about one-half.
(E) When in the “state within a predetermined distance range”, the display contents can be grasped by the user without displaying the entire display. For example, the display size is reduced to about a half of the display size.
(F) When the user is not within the predetermined distance range and is watching the program in a normal state, the entire display is performed on the screen of the PDP 4.

  The “program genre display control function” and the “user status display control function” can be configured so that the functions are always turned on, but in this embodiment, user convenience From the viewpoint of ensuring, these functions will be described on the assumption that they can be turned on and off by the user.

[1.2] Operation of the First Embodiment Next, regarding the specific operation in the video display device DIS described above, (1) management table update processing, and (2) display size according to the user situation, etc. The display control process to be varied will be described in this order.

(1) Management Table Update Processing First, processing executed when updating the management table in the video display device DIS according to the present embodiment will be described with reference to FIG. FIG. 5 is a diagram illustrating processing executed by the user situation analysis unit 9 in the video display device DIS according to the present embodiment. This processing is performed when the above-described user situation display control function is on. This is a process executed by the user situation analysis unit 9 in parallel with a display control process to be described later when the DIS power is turned on.

  In this process, the user situation analysis unit 9 first acquires the environmental data CD from the surrounding environment detection unit 8 and monitors the control signal supplied from the operation unit 7 (step Sa1), and acquires the acquired environmental data. Based on the CD and the control signal, a process for updating the management table TBL is executed (step Sa2 to step Sa12), and it is determined whether or not to end the process (step Sa13). Then, the user situation analysis unit 9 terminates the process when determining “yes” in this determination, and returns the process to step Sa1 when determining “no”, and then updates the management table TBL again. The processing is executed (step Sa2 to step Sa12), and such a series of processing is repeated (step Sa13 “no”).

  In the update process of the management table TBL (step Sa2 to step Sa12), the user situation analysis unit 9 executes the following process.

< Detection of "Out of Seat" >
First, the user situation analysis unit 9 determines whether or not a user exists within the viewing range of the PDP 4 based on the camera image and the detection data of the infrared sensor included in the environment data CD in order to detect the “seated state”. If the determination is “no” in this determination, the management table TBL is reset (that is, all flags are set to “0”), and the “seated state” flag is changed to “1”. (Step Sa3).

< Detection of "while watching" >
On the other hand, if “yes” is determined in step Sa2, the user situation analysis unit 9 determines whether or not the user is “while watching” based on the camera video included in the environment data CD, that is, the user's line of sight is displayed on the screen. Is determined (step Sa4). If the determination is “yes”, the management table TBL is reset, and then the “while watching” flag is changed to “1” (step Sa5).

< Detection of "sleeping" >
On the other hand, when it is determined as “no” in step Sa4, the user situation analysis unit 9 determines whether or not the user is “sleeping” based on the camera image included in the environment data CD, that is, the user has his eyes. It is determined whether or not it is in a closed state (step Sa6). If “yes” is determined in this determination, the management table TBL is reset, and then the “sleeping state” flag is changed to “1” (step Sa7).

< Detection within "predetermined distance" >
On the other hand, when it is determined as “no” in step Sa6, the user situation analysis unit 9 calculates the distance between the user and the PDP 4 based on the environment data CD, and whether or not the user is in the “predetermined distance range”. (Yes in step Sa8) If the determination is “yes”, the management table TBL is reset, and then the “within predetermined distance range” flag is changed to “1” (step Sa9).

< Detection of "zapping state" >
On the other hand, when it is determined as “no” in step Sa8, the user situation analysis unit 9 determines whether or not it is in the “zapping state” based on the control signal supplied from the operation unit 7 (step Sa10). In this determination, if “yes” is determined, the management table TBL is reset, and then the “zapping state” flag is changed to “1” (step Sa11), while if “no” is determined in step Sa10, the management table TBL is changed. Are set to “0” (step Sa12).

  Thereafter, the processing in steps Sa1 to Sa13 is repeated until the power of the video display device DIS is turned off, so that the management table TBL is updated, and the user's situation is reflected in the management table TBL as needed. .

(2) Display control processing for changing display size according to user situation etc. Next, referring to FIG. 6 and FIG. 7, in the video display device DIS according to the present embodiment, according to the attribute of the broadcast program and the user situation. A process for changing the display size of the screen will be described. 6 and 7 are flowcharts showing processing executed by the system control unit 11 in the video display device DIS according to the present embodiment.

  First, the system control unit 11 determines whether or not the above-described user status display control function is on (step Sb1). Then, the following processing is executed according to the determination result.

(A) When the User Status Display Control Function is Off In this case, the system control unit 11 determines “no” in step Sb1, and advances the process to step Sb7 without executing the processes in steps Sb2 to Sb6.

(B) When the user status display control function is on On the other hand, when the function is on, the system control unit 11 determines “yes” in step Sb1 and refers to the contents of the management table TBL while performing steps Sb2 to Sb2. A user situation specifying process shown in Sb6 is executed, and a process for changing to a display size corresponding to the user situation shown in steps Sb18 to Sb20 described later (hereinafter referred to as “user situation display size changing process”) according to the determination result. )).

< User status identification processing >
In this process, the system control unit 11 first refers to the “out of seat state” flag, and whether or not the flag is “1” (that is, whether or not the user is in “out of seat state”). Is determined (step Sb2). In this determination, if “yes” is determined, the user status display size changing process (steps Sb18 to Sb20) is executed, whereas if “no” is determined, the process proceeds to step Sb3.

  Next, in step Sb3, the system control unit 11 refers to the “while watching state” flag, and whether or not the flag is “1” (that is, whether or not the user is “while watching”). ). In this determination, if “yes” is determined, the user status display size changing process (steps Sb18 to Sb20) is executed, whereas if “no” is determined, the process proceeds to step Sb4.

  In step Sb4, the system control unit 11 refers to the “sleeping state” flag and determines whether the flag is “1” (that is, whether the user is in the “sleeping state”). If “yes” is determined, the user status display size changing process (steps Sb18 to Sb20) is executed, whereas if “no” is determined, the process proceeds to step Sb5. In step Sb5, the system control unit 11 refers to the “within a predetermined distance range” flag and determines whether or not the flag is “1” (that is, the user is within the “predetermined distance range”). If the determination is “yes”, the user status display size changing process (steps Sb18 to Sb20) is executed. If the determination is “no”, the process proceeds to step Sb6. .

  On the other hand, when the process proceeds to step Sb6, the system control unit 11 refers to the “zapping state” flag in the management table TBL and determines whether or not the flag is “1” (that is, the user sets “Zapping”). In the case of “yes”, the user status display size changing process (steps Sb18 to Sb20) described below is executed, whereas “no” is determined. In the case (that is, when the user is in a normal viewing state), the process proceeds to step Sb7.

  As a result of executing such a series of processes, the process proceeds to step Sb7 only when it is determined that the user is in the normal viewing state, while the user's situation is not in the normal viewing state (for example, “Excluded state”, etc.), the process proceeds to the user status display size changing process described below.

< User status display size change processing >
On the other hand, when it is determined in the above user situation specifying process that the user is in a situation such as “out of seat state” and the process shifts to the user situation display size changing process, the system control unit 11 first determines the user situation. It is in a state where it is determined whether or not there has been a change (step Sb18). If it is determined "no", that is, if it is determined that the user situation has not changed since the previous determination, the process of step Sb20 is executed. Without any change, the current display state is maintained (step Sb19), and the process proceeds to step Sb21. Then, in step Sb21, it is determined whether or not to end the process. If it is determined as “yes” in the determination, the process is ended. If it is determined as “no”, the process is returned to step Sb1.

  On the other hand, when it is determined as “yes” in step Sb18 (that is, when it is determined that the user situation has changed since the previous determination), the system control unit 11 changes the display size according to the user situation. (Step Sb20), the process proceeds to step Sb21. At this time, the system control unit 11 controls the video processing unit 2 to generate display data SD so that an image is displayed on the PDP 4 with a display size corresponding to the user situation. In addition, the system control unit 11 controls the panel driving unit 3 to turn off the power of the address driver 331 and the like corresponding to the area other than the display target area.

  As a result of the process described above being repeated until the power is turned off and the state is changed to “yes” in step Sb21, the display size in the PDP 4 is changed every time the user situation changes, and power saving corresponding to the user situation is achieved. Will be illustrated.

(C) On the other hand the processing of the case that led to step Sb6, the result of the processing, (i) if the user status display control function is turned off, or is determined that is in the normal viewing conditions (ii) user In this case, the process proceeds to step Sb7 as described above. Then, the system control unit 11 monitors data corresponding to the broadcast program supplied from the tuner 1 (step Sb7), and executes display size variable processing according to the attribute of the broadcast program based on the data (step Sb7). Sb8 to Sb17).

  In this process, the system control unit 11 first determines whether or not a change has occurred in at least one of (a) the attribute of the broadcast program being received and (b) the user status (step Sb8). Such a determination is made when (a) when there is no change in the attributes of the broadcast program being received, it is necessary to maintain the display state in the current state, and (b) the state changes to the user. This is because, for example, there is a high possibility that a state such as “out of seat state” is continuing, and it is necessary to maintain the current display state. For this reason, if it is determined as “no” in this determination, the system control unit 11 performs the process without executing the processes of steps Sb9 to Sb16 (that is, the display control process according to the attribute of the broadcast program). After shifting to Sb17 and maintaining the current display state, the process proceeds to step Sb21.

  On the other hand, if “yes” is determined in step Sb8, for example, (a) the attribute of the broadcast program being received has changed due to a change in the reception channel or the like, or (b) the user status is “out of seat” This means that a situation such as a change from a state such as "" to a normal viewing state has occurred. For this reason, if it determines with "yes" in this determination, the system control part 11 will determine what kind of broadcast program the broadcast program supplied from the tuner 1 is (step Sb9), and according to this determination result The following processing is executed.

(A) When the broadcast type is data broadcast If it is determined in step Sb9 that the broadcast type is data broadcast, the system control unit 11 executes a screen display size change process in the PDP 4 (step Sb10). Specifically, at this time, the system control unit 11 controls the video processing unit 2 so that the size of the image generated based on the data broadcast is divided into, for example, two areas with respect to the entire screen area of the PDP 4. And the panel driver 3 is controlled to shift the power supply of the address driver 331, the first and second sustain drivers 332 and 333 related to the non-display area to an off state. When this process is completed, the system control unit 11 shifts the process to the above-described step Sb21. When the determination is “yes” in step Sb21, the process ends. On the other hand, when the determination is “no”, the process returns to step Sb1. Let

(B) When the broadcast type is digital satellite radio broadcast If it is determined in step Sb9 that the broadcast type is digital satellite radio broadcast, the system control unit 11 shifts the image display on the PDP 4 to a completely off state. After (step Sb11), the process is shifted to the above-described step Sb21. When “yes” is determined, the process ends. On the other hand, when “no” is determined, the process returns to step Sb1. At this time, the system control unit 11 controls the panel driving unit 3 to completely turn off the power of the address driver 331, the first and second sustain drivers 332 and 333 (that is, the power supply to the driver is cut off). State).

(C) When the broadcast type is TV broadcast If the broadcast type is determined to be TV broadcast in step Sb9, the system control unit 11 determines whether or not the above-described program genre display control function is turned on. (Step Sb12). Then, the following processing is executed according to the on / off of the program genre display control function.

<When program genre display control function is off >
In this case (ie, step Sb12 “no”), the system control unit 11 monitors the data supplied from the tuner 1 (step Sb13), and determines whether or not the received broadcast program is a high-definition broadcast. (Step Sb14) Display control is performed to an appropriate display size according to the determination result (Steps Sb15 and Sb16). Specifically, if the data being received corresponds to a high-definition broadcast program, the system control unit 11 controls the video processing unit 2 to display the display data SD so that the entire display of the PDP 4 is displayed. Generate. At this time, the system control unit 11 controls the panel driving unit 3 to shift all the power sources of the address driver 331 and the first and second sustain drivers 332 and 333 to the ON state. On the other hand, when the data being received corresponds to an SD broadcast program, the system control unit 11 controls the video processing unit 2 to generate display data SD with the number of scanning lines of the SD broadcast. At the same time, when the display is performed with the number of scanning lines by controlling the panel drive unit 3, the power of the address driver 331 and the like corresponding to the non-display area is switched off.

<When program genre display control function is on >
In this case (that is, step Sb12 “yes”), the system control unit 11 executes the processing shown in FIG. In this process, the system control unit 11 first identifies the genre corresponding to the broadcast program being received (step Sb101). Next, the system control unit 11 reads the setting table TBL2 (step Sb102), and extracts the display size corresponding to the broadcast program type specified in step Sb101 (step Sb103). When the extraction of the display size is completed in this way, the system control unit 11 controls the video processing unit 2 and the panel driving unit 3 according to the extracted display size, and changes the display size in the PDP 4 (step Sb104). . Specifically, the system control unit 11 controls the video processing unit 2 based on the read display size, and generates display data SD so that an image is displayed on the PDP 4 at the size. . At this time, the system control unit 11 controls the panel driving unit 3 to turn off the power of the address driver 331 and the like corresponding to the area other than the display target area. In this way, when the change of the display size is completed, the system control unit 11 shifts the process to step Sb21. When the determination is “yes”, the process ends. On the other hand, when the determination is “no”, the step is performed again. Return to Sb1.

  Then, the processes shown in steps Sb1 to Sb21 described above are repeated until, for example, the power of the video display device DIS is turned off, and displayed on the PDP 4 as needed according to changes in the user's situation and broadcast program attributes. The display size of the image to be changed is changed.

  In this way, the video display device DIS according to the present embodiment detects at least one of (a) the eye state of the user and (b) the distance from the user to the video display device DIS, and the detection result Accordingly, a configuration for controlling the power consumption in the video display device DIS is adopted. For this reason, it becomes possible to reduce power consumption appropriately according to surrounding environments, such as a user's condition.

  In particular, in the case of the present embodiment, a configuration is adopted in which “while watching” or “sleeping state” is detected according to the state of the user's eyes, and the power consumption is reduced when these states are detected. . For this reason, even when the user is present in front of the video display device DIS and does not look at the screen, it is possible to appropriately reduce the power consumption, thereby greatly reducing the power consumption. Can be realized. Further, for example, even when the user does not need to display an image on the full screen because the user is in the vicinity of the video display device DIS, the display size can be appropriately reduced to reduce power consumption. On the other hand, even when there is no need to display the entire screen as in the “zapping state”, the power consumption can be appropriately reduced.

  Furthermore, in the video display device according to the present embodiment, the content attribute included in the received broadcast wave is detected, and the power consumption is controlled according to the detection result. For this reason, it becomes possible to select an appropriate display size according to the broadcast type of the broadcast service or the genre of the content and display the video at the display size, and accordingly, according to the attribute of the broadcast program Appropriate power consumption can be reduced.

  Furthermore, in this video display device DIS, a configuration is adopted in which the power of the address driver 331 and the like corresponding to the non-display area is turned off while changing the video display size as a power consumption reduction method. The amount of power consumption in the non-display area can theoretically be set to “0”, and the power consumption can be greatly reduced. On the other hand, when the power of the address driver 331 or the like in the non-display area is simply turned off, it may be assumed that the entire video portion corresponding to the content cannot be displayed. However, in this embodiment, the display data SD itself Therefore, it is possible to effectively prevent such occurrences.

  In the first embodiment, the power supply of the address driver 331 and the like corresponding to the non-display area is turned off. However, for the non-display area, even if a method of simply displaying black is used, Since it is not necessary to supply a signal (sustain pulse) to be supplied to the PDP 4 in order to maintain light emission, it is possible to reduce power consumption.

  In the first embodiment, when the program genre display control function is realized, the user can arbitrarily set the display size corresponding to each genre. However, the display size corresponding to each genre in advance is adopted. May be determined, and the display size may be changed according to the size.

  Furthermore, in the first embodiment described above, a configuration is adopted in which an image is displayed with a predetermined display size even when an “out of seat” state or a “sleeping state” is detected. When it is detected, a configuration for turning off the image display itself for the PDP 4 may be adopted.

  Furthermore, in the first embodiment, a method of saving power by restricting the display size of the screen in the PDP 4 has been adopted. However, by setting the display brightness or volume according to the broadcast program attributes and the user situation, the screen is darkened according to the user situation or the like, or the volume is reduced. Electricity may be achieved.

  Furthermore, in the first embodiment, the surrounding environment detection unit 8 is provided with a camera and an infrared sensor, and the user status analysis unit 9 determines whether the user is in an “out of seat” state according to the detection results of these sensors. The method of judging whether or not was adopted. However, for example, a sound sensor may be provided in the surrounding environment detection unit 8 to determine whether or not the user is out of the seat based on the user's footsteps, breathing sound, or the like. Further, for example, an illuminance sensor or a temperature sensor may be provided in the ambient environment detection unit 8 so as to detect the “out of seat state” of the user based on indoor brightness, room temperature, or the like.

  In the first embodiment, the broadcast program is described as an example of the content type. However, the specific content is arbitrary.

  In the first embodiment, the method of using both the change of the display size based on the attribute of the content data and the change of the display size based on the user situation is employed. However, only one of the functions is realized. You may make it do.

[1.3] Modification Example of First Embodiment (1) Modification Example 1
In the first embodiment, the configuration in which the display size is simply changed according to the genre of the broadcast program is employed. However, a commercial is often inserted into an actual broadcast program, and it is unlikely that the user's convenience is impaired even if the full-screen display is not performed. Therefore, when a commercial exists during reception of a broadcast program, the system control unit 11 identifies the insertion position of the commercial in the broadcast program, and the display size is set to, for example, a half during the commercial broadcast period. You may make it change to. Note that the method for specifying the commercial part by the system control unit 11 is arbitrary. For example, in the case of terrestrial digital broadcasting, it can be specified based on the above metadata, and in the case of a broadcasting mode in which no metadata exists. Even so, since a commercial is usually broadcasted in stereo (that is, audio of a plurality of channels), for example, the location of the stereo broadcast is specified based on the data (or TV signal) supplied from the tuner 1. This makes it possible to specify a commercial part in a broadcast program.

(2) Modification 2
In the first embodiment, a configuration has been adopted in which one PDP 4 is provided in the video display device DIS and power saving is achieved by changing the display mode for the PDP 4. However, a plurality of PDPs 4 each having a different size may be provided, and the PDP 4 to be used may be switched according to the broadcast program attribute or the user's situation. In this case, it is necessary to provide a plurality of panel driving units 3 for driving each PDP 4 and to provide a switching switch on an output line for outputting the display data SD from the video processing unit 2. Then, the system control unit 11 changes the connection destination of the switch according to the attribute of the broadcast program and the user's situation. By adopting such a configuration, for example, when the user's situation is “while watching”, the PDP 4 can be switched to save power.

(3) Modification 3
In the first embodiment, the display size of the display screen corresponding to the broadcast program is changed. However, when the video display device DIS is provided with a terminal for external input and various electronic devices are connected to the terminal, the display size can be varied according to the resolution of the content data input from the electronic device. Is also possible. In the case of adopting this configuration, an input I / F (interface) unit is provided for the video display device DIS, and for example, a line input terminal such as an input terminal or a D terminal or an RGB input terminal with respect to the I / F unit. Various external input terminals are provided. When content data is supplied to the terminal from an external device such as a PC (Personal Computer) or DVD (Digital Versatile Disc), the supplied content data is separated into a video component and an audio component. The video components are supplied to the video processing unit 2 and the system control unit 11, while the audio components are supplied to the audio processing unit 5.

  Then, based on the video component of the content data supplied from the I / F unit, the system control unit 11 identifies the resolution of the content data and changes the display form according to the identification result. An example of this display mode changing method is shown in FIG.

  In the case shown in the figure, for example, when the RGB input content data includes, for example, video conforming to the VGA (Video Graphics Array) standard, the system control unit 11 controls the video processing unit 2 to be 640 × 480. The display data SD is generated at the pixel resolution, and the panel driver 3 is controlled to turn off the power of the address driver 331 corresponding to the non-display area. On the other hand, when the content data includes video conforming to the XGA (eXtended Graphics Array) standard, the system control unit 11 controls the video processing unit 2 to generate display data SD with a resolution of 1024 × 768 pixels, for example. Let Furthermore, the system control unit 11 specifies the number of video scanning lines (eg, 525 for the D1 standard (ITU-R601), 1125 for the D3 standard) and resolution included in the line-input content data, and performs video processing. The unit 11 is controlled to generate display data SD at the specified resolution or the number of scanning lines.

  By adopting such a configuration, the display size can be varied according to the resolution of the input content, the number of scanning lines, and the like, and power saving according to the resolution of the input content can be realized.

[2] Second Embodiment Next, a video display device DIS according to a second embodiment of the present application will be described. The video display device DIS according to the present embodiment is realized by the same configuration as the video display device DIS according to the first embodiment (that is, the configuration shown in FIG. 1). Therefore, unless otherwise indicated, each element constituting the video display device DIS according to the present embodiment realizes the same function as in the first embodiment.

  Here, in the video display device DIS according to the present embodiment, in addition to the functions realized in the video display device DIS according to the first embodiment, it is within the range of the electricity charges set in advance by the user. This is for realizing a function of reducing the power consumption of the video display device DIS.

  In order to realize such a function, in the present embodiment, the system control unit 11 sets, for example, a target electricity rate for one month according to an input operation performed on the operation unit 7 by the user. Based on the target value set in this way, the system control unit 11 calculates a consumable power amount per month, and calculates the calculated consumable power amount, for example, the number of days in a month or By dividing by the number of weeks, the power consumption per day or week is calculated, and the calculated value and the set value of the power consumption per month are recorded in a memory (not shown). Then, the system control unit 11 integrates the power consumption amount on the memory, and compares the integrated value with the set value to reduce the power consumption.

  The specific reduction criteria are arbitrary, and for example, the following method may be adopted.

< Method 1 >
For example, the power consumption is managed on a daily or weekly basis, and (i) if the target value is achieved, the PDP 4 can be used without reducing the display size on that day or on or after that week. (Ii) When the target value is not achieved, the power consumption is brought close to the set value by reducing the display size in the day or week after that day or week. To do. When the display size is reduced by adopting such a method, for example, the display size is changed to 1/2 or 1/4 according to the achievement rate with respect to the target value. Also good.

< Method 2 >
Also, for example, the achievement rate with respect to the target value is managed every week, and for the first few days of the week, the image is displayed on the PDP 4 without reducing the display size, and the display size is reduced in the second few days. This may be done to reduce power consumption.

  Note that the control of the display size based on the power consumption amount set by the user is different from the control of the display size (that is, the control of the display size according to the user situation or the control of the display size according to the attribute of the broadcast program). Whether or not to give priority is arbitrary. However, if the power consumption is set by the user, the user is most likely to place the most importance on changing the display size based on the power consumption. Therefore, display size control is performed according to the power consumption. It is desirable to apply the highest priority.

  When such a method is adopted, the achievement rate for the target set value is calculated prior to the processing shown in FIGS. 6 and 7, and when the target is not achieved, the results shown in FIGS. The display size is forcibly changed without executing the process, and the processes shown in FIGS. 6 and 7 may be executed only when the target is achieved.

  Further, whether or not to present the achievement rate for the set target value to the user is arbitrary. For example, when the user performs a predetermined input operation on the operation unit 7, FIG. An image as shown may be displayed to show the achievement rate with respect to the target value to the user.

  In this manner, in the video display device DIS according to the present embodiment, the display size for displaying an image on the PDP 4 is changed according to the electricity bill set by the user (that is, the power consumption amount), and the power consumption Since the amount is reduced, it is possible to prevent a situation in which an electric charge unintended by the user is charged.

It is a block diagram which shows the structure of the video display apparatus DIS in 1st Embodiment. It is a figure which shows an example of the recording content of the management table TBL in the same embodiment. (A) is a figure which shows the change method of the display form according to broadcast classification, (b) is a figure which shows the change method of the display form according to the genre of a broadcast program, (c) is a user It is a figure which shows the change method of the display form according to the condition. It is a figure which shows an example of the recording content of the setting table TBL2 in the same embodiment. It is a flowchart which shows the process which the user condition analysis part 9 performs in the same embodiment. It is a flowchart which shows the process which the system control part 11 performs in the same embodiment. It is a flowchart which shows the process which the system control part 11 performs in the same embodiment. It is a figure which shows an example of the change method of the display form according to the resolution etc. of the content data in the modification 3 of the embodiment. It is a figure which shows an example of the display screen in 2nd Embodiment.

Explanation of symbols

DIS ... Video display device 1 ... Tuner 2 ... Video processing unit 3 ... Panel drive unit 4 ... PDP
DESCRIPTION OF SYMBOLS 5 ... Voice processing part 6 ... Amplifier part 7 ... Operation part 8 ... Ambient environment detection part 9 ... User condition analysis part 10 ... ROM / RAM
11 ... System control unit 12 ... Bus

Claims (28)

A power consumption control device for controlling power consumption in a playback device that plays back input content data and outputs video and audio,
(A) the state of the user's eyes, and (b) the distance from the user to the playback device,
Detecting means for detecting at least one of
And a control means for controlling the power consumption in the playback device based on the detection result in the detection means. The detection means further detects the user's line of sight based on the detected eye state of the user,
2. The power consumption control device according to claim 1, wherein the control unit reduces the power consumption of the playback device except when a user's line of sight is detected by the detection unit. The detection means further detects an open / closed state of the user's eyes based on the detected eye state of the user,
2. The power consumption control according to claim 1, wherein when the detection unit detects that the user's eyes are in a closed state, the control unit reduces the power consumption of the playback device. apparatus.   2. The power consumption control device according to claim 1, wherein the control unit reduces the power consumption of the playback device when the distance detected by the detection unit is smaller than a predetermined value. A power consumption control device for controlling power consumption in a playback device that plays back input content data and outputs video and audio,
A power consumption control device comprising: control means for controlling power consumption in the playback device when a user performs an input operation more than a predetermined number of times within a predetermined time. In the case where the playback device has receiving means for receiving the content data,
The control means reduces the power consumption in the playback device when the user performs an input operation for switching the reception frequency in the reception means more than a predetermined number of times within a predetermined time. The power consumption control device according to claim 5. A power consumption control device for controlling power consumption in a playback device that plays back input content data and outputs video and audio,
Detecting means for detecting attributes of content data input to the playback device;
A power consumption control device comprising: control means for controlling power consumption in the playback device in accordance with a detection result in the detection means.   The power consumption control apparatus according to claim 7, wherein the detection unit detects, as an attribute of the content data, a genre to which content corresponding to the content data belongs. A setting unit for setting the power consumption for each genre of the content;
The consumption according to claim 7, wherein the control means controls the power consumption in the playback device based on the genre detected by the detection means and the power consumption set by the setting means. Electric energy control device. When the content data is broadcast using a broadcast wave,
The power consumption control device according to claim 7, wherein the detection unit detects a broadcasting mode when broadcasting the content data as the attribute of the content data.   8. The power consumption control apparatus according to claim 7, wherein the detection unit detects at least one of a resolution and a number of scanning lines of the content data as an attribute of the content data. A power consumption control device for controlling power consumption in a playback device that plays back input content data and outputs video and audio,
A setting means for setting a period and an upper limit value of the electric energy allowed to be consumed within the period according to a user input operation;
A power consumption control device comprising: control means for controlling the power consumption in the playback device in accordance with the power amount and period set by the setting means. When the playback device includes a display device for displaying video,
The power consumption amount according to any one of claims 1 to 12, wherein the control means controls the power consumption amount by changing a display size of an image displayed on the display device. Control device. The display device further comprises a generating means for generating display data for displaying a video corresponding to the content data.
The control means determines the display size of the video output on the display device and controls the generation means to generate the display data so that the video is displayed at the determined display size. The power consumption control device according to claim 13.   15. The power consumption control device according to claim 14, wherein the control unit varies the resolution of the display data by controlling the generation unit.   The power consumption control device according to any one of claims 13 to 15, wherein the display device is a plasma display panel. An electronic device that outputs video and audio based on input content data,
(A) the state of the user's eyes, and (b) the distance from the user to the playback device,
Detecting means for detecting at least one of
An electronic device comprising: a control unit that controls power consumption in the electronic device based on a detection result in the detection unit. An electronic device that outputs video and audio based on input content data,
An electronic apparatus comprising: control means for controlling power consumption in the electronic apparatus when a user performs an input operation more than a predetermined number of times within a predetermined time. An electronic device that outputs video and audio based on input content data,
Detecting means for detecting attributes of the input content data;
An electronic device comprising: a control unit that controls power consumption in the electronic device according to a detection result in the detection unit. An electronic device that outputs video and audio based on input content data,
A setting means for setting a period and an upper limit value of the electric energy allowed to be consumed within the period according to a user input operation;
An electronic device comprising: control means for controlling power consumption in the electronic device in accordance with the amount of power and the period set by the setting means. A power consumption control method for controlling power consumption in a playback device that plays back input content data and outputs video and audio,
(A) the state of the user's eyes, and (b) the distance from the user to the playback device,
A detection step of detecting at least one of
And a control step of controlling the power consumption in the playback device based on the detection result in the detection step. A power consumption control method for controlling power consumption in a playback device that plays back input content data and outputs video and audio,
A method for controlling power consumption, comprising: a control step of controlling power consumption in the playback device when a user performs an input operation more than a predetermined number of times within a predetermined time. A power consumption control method for controlling power consumption in a playback device that plays back input content data and outputs video and audio,
A detection step of detecting an attribute of content data input to the playback device;
And a control step for controlling the power consumption in the playback device according to the detection result in the detection step. A power consumption control method for controlling power consumption in a playback device that plays back input content data and outputs video and audio,
A setting step for setting a period and an upper limit value of the electric energy allowed to be consumed within the period according to a user input operation;
And a control step of controlling the amount of power consumption in the playback device in accordance with the amount of power and the period set in the setting step. A power consumption control program for controlling the power consumption in a playback device that reproduces input content data and outputs video and audio by a computer,
(A) the state of the eye of the user, and (b) the distance from the user to the playback device,
Detecting means for detecting at least one of
Control means for controlling the amount of power consumption in the playback device based on a detection result in the detection means;
It is made to function as, The power consumption control program characterized by the above-mentioned. A power consumption control program for controlling the power consumption in a playback device that reproduces input content data and outputs video and audio by a computer,
A power consumption control program that causes the computer to function as control means for controlling power consumption in the playback device when a user performs a predetermined number of input operations within a predetermined time. A power consumption control program for controlling the power consumption in a playback device that reproduces input content data and outputs video and audio by a computer,
Detecting means for detecting an attribute of content data input to the playback device;
Control means for controlling power consumption in the playback device in accordance with a detection result in the detection means;
It is made to function as, The power consumption control program characterized by the above-mentioned. A power consumption control program for controlling the power consumption in a playback device that reproduces input content data and outputs video and audio by a computer,
A setting means for setting a period and an upper limit value of the electric energy allowed to be consumed within the period according to a user input operation of the computer;
Control means for controlling the amount of power consumed in the playback device in accordance with the amount of power and the period set by the setting means;
It is made to function as, The power consumption control program characterized by the above-mentioned.

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