JP2000242255A - Image display device - Google Patents

Abstract

(57) [Summary] [Problem] By eliminating unnecessary image display states,
Provide an image display device that efficiently reduces power consumption. SOLUTION: A microcomputer of an image display device is configured such that a person viewing the screen from a state in which a display area for displaying an image corresponding to an input video signal is displayed using the entire display screen of the screen is displayed. Each time a detection is not performed for a predetermined time ts, a message display to shift to the power saving mode, a reduction in the brightness of the display screen, a reduced display on a part of the screen, a stop of image display, and a power stop are sequentially executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an image display device such as a television.

[0002]

2. Description of the Related Art Conventionally, a television which is a typical image display device has a Cds
Some devices have a function of providing a sensor or the like, sensing ambient brightness by the sensor, and changing display brightness in accordance with the sensed brightness, thereby harmonizing the brightness around the contrast of the displayed image.

[0003] An image display device using a CRT or the like used in a personal computer or the like is provided with a moving image set in advance so as to prevent a display image from sticking to a screen when no operation is performed for a predetermined time. To display images,
A function of partially deleting a display image, a function of stopping display of an image on the image display device side by performing a predetermined operation on a synchronization signal on the personal computer side, and the like are provided. In such conventional functions, input operations are generally monitored based on the presence or absence of an input operation from a keyboard, a mouse, or the like.

In an image display device having such a function, for example, in a television, as a general method for reducing power consumption, the presence or absence of a synchronization signal is detected after the end of late-night broadcasting, and the detected result is used as a result. Some devices have a function of automatically turning off the power in response to such a problem, and power consumption tends to increase due to an increase in the size of a device accompanying recent demand for multimedia and multi-channel.

[0005]

However, the demand for power saving of electric appliances is increasing with the times, and when an image is displayed, power consumption when no one is looking at the displayed image is reduced. It is a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image display device which can efficiently reduce power consumption by eliminating unnecessary image display states.

[0007]

In order to achieve the above object, an image display device according to the present invention has the following configuration.

That is, an image display device for displaying an image on a display device, wherein the display device has sensing means for sensing a person, and an image to be displayed when the sensing means does not sense a person for a predetermined time. Control means for reducing the display in a part of the display area or stopping the display.

In the above device configuration, the control means displays an image to be displayed in a display area of the display device with reduced display luminance when a person is not sensed for a predetermined time by the sensing means, or Alternatively, the display of the image on the display may be stopped and only the audio output may be performed.

Alternatively, there is provided an image display apparatus for displaying an image on a display device, comprising: sensing means for sensing a person; brightness reduction of a display image on a display area of the display device; and reduced display on a part of the display area. And stopping the display of the display image,
Control means for sequentially performing each time a person is not sensed for a predetermined time by the sensing means.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an image display device according to the present invention will be described in detail with reference to the drawings.

[First Embodiment] FIG. 1 shows a first embodiment of the present invention.
It is a front view showing the whole image display device composition in an embodiment. FIG. 2 is a block diagram illustrating a circuit configuration of the image display device according to the first embodiment of the present invention.

In FIG. 1 and FIG. 2, a sensor 1 is a sensor for detecting the movement of a person and the presence or absence of the person. For example, a general infrared sensor may be employed. The display area (screen) 2 is an image display area of a display such as a CRT or a cold cathode tube. Then, a sound is output from the speaker 3.

The microcomputer 5 performs predetermined image processing on the input video signal, controls the video processing unit 6 so that an image corresponding to the input video signal is displayed on the screen 2, and controls the input video signal. The audio processor 7 is controlled so that the corresponding audio is output from the speaker 3. The video processing unit 6 and the audio processing unit 7 will be described later with reference to FIGS.

Also, as a feature of the present embodiment, the microcomputer 5 is provided with a video processing unit when a person cannot be detected in front of the screen 2 for a predetermined time based on the input signals from the sensor 1 and the clock 4. A transition is made to a power saving mode for causing the audio processing unit 6 and the audio processing unit 7 to perform a predetermined operation described later.

FIG. 3 is a block diagram showing the configuration of the video processing unit of the image display device according to the first embodiment of the present invention.

A video processing unit 6 shown in FIG. 1 has a function of displaying a display area for displaying an image corresponding to an input video signal using the entire display screen of the screen 2, a function of reducing the brightness of the display screen, It has a function of reducing the display on a part of the screen 2 and a function of displaying a predetermined message. In the present embodiment, since these functions are realized by control of the microcomputer 5, the video processing unit 6
First, the analog / digital (A
/ D) The signal is converted into a digital signal by the converter 9 and stored in the memory 10 as digital video data.

An A / D clock used for A / D conversion by the A / D converter 9 is a PLL (Phase Locked Loop).
It is generated by the part 14.

The PLL unit 14 includes an oscillator (not shown) capable of controlling the oscillation frequency and a frequency divider for dividing the oscillated clock. The clock oscillated by the oscillator is divided by the divider. The first signal and the second signal obtained by separating the synchronization signal included in the video input signal by the synchronization signal separation unit 15
By controlling the oscillation frequency of the oscillator so that the frequency of the first signal is the same as the frequency of the second signal, a clock synchronized with the synchronization signal is obtained. Output.

A signal for reading the video data stored in the memory 10 is controlled by the PLL 2 based on a control signal from the microcomputer 5. The video data output from the memory 10 can be adjusted in display amplitude (Gain control) by the luminance control unit 11 to adjust display luminance (reduce luminance to reduce power consumption).

Next, a signal (digital data) output from an OSD (on-screen display) unit 17 can be added by the screen display control unit 12 to the video data whose brightness has been adjusted by the brightness control unit 11. The digital data output from the OSD unit 17 represents a predetermined message for shifting to the power saving mode, and is output from the OSD unit 17 when instructed in control processing of the microcomputer 5 described later.

The video data processed by the image display control unit 12 is converted again into an analog video signal in a digital / analog (D / A) conversion unit 13.

FIG. 4 is a block diagram showing the configuration of the audio processing unit of the image display device according to the first embodiment of the present invention.

When a voice switching signal output from the microcomputer 5 is input, the voice processing unit 7 shown in FIG. 1 switches the switch 21 and stores a digital data representing a predetermined message in advance. The data read from the table 19 is converted by the D / A converter 20 into an analog audio signal, and the converted audio signal is output via the switch 21. This allows
The output of the audio signal input to the audio processing unit 7 is stopped.

FIG. 5 is a flowchart showing a control process executed by the microcomputer of the image display device according to the first embodiment of the present invention.

At the same time, step S1: by executing the subroutine of the timer count process shown in FIG. 6, whether or not a person cannot sense for a predetermined time based on the output signal of the sensor 1 of the sensor 1, and It is determined whether the setting for prohibiting the execution of the power saving mode is performed by a user setting switch (not shown). This determination step is performed in steps S3, S5, S7, and S9.

FIG. 6 is a flowchart showing a timer count process executed in the control process by the microcomputer of the image display device according to the first embodiment of the present invention. In the figure, when the predetermined time has not elapsed in the judgment of step S11, whether or not there is an input signal from the sensor 1 (step S12), the operation of the user setting switch for inhibiting the execution of the power saving mode is performed. Is determined (step S13), and if any of steps S12 and S13 is YES, it is determined that the standard screen display using the front surface of the screen 2 as in the display example of FIG. 1 is performed, and the process returns to step S11. On the other hand, if the determination in step S11 is YES (timeout), the process returns to the main routine of FIG.

When a predetermined time is counted in the timer counting process, in step S2, the OSD unit 17 and the screen display control unit 12 are operated to
As a predetermined message indicating the shift to the power saving mode, for example, a message such as “shift to the power saving mode” is displayed on the full screen screen as shown in FIG.

Next, when a predetermined time is counted in the timer counting process in step S3, in step S4, the luminance control unit 11 is operated to
Reduce the brightness of the display screen.

Next, when a predetermined time has been measured in the timer counting process in step S5, the screen display control unit 12 is operated in step S6 to change the full-screen display screen as shown in FIG. It is reduced and displayed on a part of the screen 2.

Next, when a predetermined time is measured in the timer counting process in step S7, in step S8, the reduced display of the screen 2 is turned off by operating the screen display control unit 12. Stop displaying the video on the screen (stop). As a result, only sound output by the sound processing unit 7 is performed from the image display device.

Next, when the predetermined time is counted in the timer counting process in step S9, the power supply is stopped, and the sound output by the sound processing unit 7 is also stopped.

As described above, according to the present embodiment, the operation of the image display device is gradually regulated every time the predetermined time elapses by the timer count process, and finally the power is automatically turned off. If a person is detected during the regulation, the display can return to the standard screen display at that point. This eliminates unnecessary image display states, thereby efficiently reducing power consumption.

Incidentally, the setting of the predetermined time for shifting to the power saving mode may be a fixed value stored in a memory in advance or may be set by an automatic setting function described below.

FIG. 7 is a flowchart showing a predetermined time setting process executed by the microcomputer of the image display device in the control process according to the first embodiment of the present invention. In the figure, a predetermined time ts for shifting to the power saving mode is set to, for example, 15 minutes (step S101).
Generally, the program often ends at around 25 minutes and 55 minutes every hour, and it is highly likely that the user is not looking at the screen. Therefore, the minute unit of the current time is 25 minutes or 55 minutes in the determination in step S102. At times, the predetermined time ts is set to 10 minutes. In step S104, the usage status of the same time zone of yesterday (or last week) is stored, and when the usage status is not used yesterday, the predetermined time ts is set to 5 minutes which is shorter. If the predetermined time ts is set by such an automatic setting function, the time until shifting to the power saving mode can be accurately set according to the user's use condition of the image display device.

The display position of the reduced-display image may be arbitrarily set by the user, or may be moved at predetermined time intervals to prevent burn-in of the displayed image. In this case, the display position can be easily changed by a general method of changing the display address of the reduced image by the microcomputer 5 at the input position or every predetermined time.

[Second Embodiment] In the present embodiment, the first
A two-dimensional sensor such as a CCD sensor or a CMOS sensor is used as the sensor 1 based on the device configuration and control processing of the image display device according to the embodiment. For this reason, in the following description, the characteristic portions in the present embodiment will be mainly described, and redundant description will be omitted.

FIG. 8 is a block diagram showing a circuit configuration of an image display device according to the second embodiment of the present invention.

The image processing unit 6 shown in FIG. 2 differs from the block diagram of FIG. 2 in the first embodiment in that a memory 8 for storing a sensor output is provided downstream of the sensor 1, and the microcomputer 5 The difference is that the sensor output is stored in the memory 8 every predetermined time, and the motion of the person is detected by comparing the history of the stored data.

FIG. 9 is a flowchart showing a timer count process executed in the control process by the microcomputer of the image display device according to the second embodiment of the present invention. The processing shown in FIG.
The difference from the flowchart of FIG. 12 is that the movement of a person is determined based on the data stored in the memory 8 in step S12, and the other steps are the same as the above-described processing.

According to this embodiment as well, power consumption can be reduced efficiently by eliminating unnecessary image display states.

[Third Embodiment] In the present embodiment, the first
The case where the image display device is a so-called television will be described based on the device configuration and control processing of the image display device in the embodiment. In the following description, a characteristic portion in the present embodiment will be mainly described, and redundant description will be omitted.

FIG. 10 is a block diagram showing a circuit configuration of an image display device according to the third embodiment of the present invention.

The image processing unit 6 shown in the figure differs from the block diagram of the first embodiment shown in FIG.
Is received by the video tuner 22 and the audio tuner 23, the video signal output from the video tuner 22 is input to the video converter 6, and the audio signal output from the audio tuner 23 is transmitted to the audio converter 7. The difference is that they are entered.

In the control process shown in FIG. 5, for example, the power supply of the video tuner 22 is stopped when the display of the screen is stopped in step S8, and the operation of the power supply is stopped after the process of step S9 is completed. The power of the audio tuner 23 may be stopped.

According to this embodiment as well, power consumption can be reduced efficiently by eliminating unnecessary image display states.

[Fourth Embodiment] In the present embodiment, the first
A case in which the order of processing performed in the control processing of FIG. 5 is changed based on the apparatus configuration and control processing of the image display apparatus in the embodiment will be described. In the following description, the description focuses on the characteristic portions of the present embodiment,
Duplicate description will be omitted.

FIG. 11 is a flowchart showing a control process executed by the microcomputer of the image display device according to the fourth embodiment of the present invention.

The control processing shown in FIG. 5 is different from the control processing shown in FIG. 5 in that the display size is reduced in step S4A from the state of full-screen display as shown in FIG. Is different in that the brightness of the screen on which the reduced display is performed is reduced.

Here, the relationship between the size of the display area and the size of the image actually displayed may be the same, or the size of the display area may be larger or smaller than the image size.

According to this embodiment as well, power consumption can be reduced efficiently by eliminating unnecessary image display states.

[Fifth Embodiment] In the present embodiment, the first
The difference is that the reduction of the display size and the reduction of the luminance are performed in the same processing step in the control processing of FIG. According to this embodiment as well, power consumption can be efficiently reduced by eliminating unnecessary image display states.

[Sixth Embodiment] In the present embodiment, the first
Based on the device configuration and control processing of the image display device according to the embodiment, the case where the transition to the power saving mode is performed not by the on-screen display on the screen 2 but by another display device such as an LED explain. In the following description, a characteristic portion in the present embodiment will be mainly described, and redundant description will be omitted.

FIG. 12 is a front view showing the entire configuration of the image display device according to the sixth embodiment of the present invention. Also,
FIG. 13 is a block diagram illustrating a circuit configuration of the image display device according to the sixth embodiment of the present invention. These figures are different from FIGS. 1 and 2 of the first embodiment, for example, in FIG.
2 is different from the case of FIG. 1 in that a display device 25 such as an LED is provided at the lower left of the screen 2.

In step S2 of the control process shown in FIG. 5, instead of performing on-screen display on the screen 2, the display device 25 is informed of the shift to the power saving mode by turning on the display device 25.

According to this embodiment as well, power consumption can be reduced efficiently by eliminating unnecessary image display states.

[Seventh Embodiment] In the present embodiment, the first
A case in which the transition to the power saving mode can be set from a remote control terminal (so-called remote controller) will be described based on the device configuration and control processing of the image display device in the embodiment. In the following description, a characteristic portion in the present embodiment will be mainly described, and redundant description will be omitted.

FIG. 14 is a block diagram showing a circuit configuration of an image display device according to the seventh embodiment of the present invention. The block diagram shown in FIG. 11 differs from that of FIG. 2 of the first embodiment in that a remote control receiver 26 for receiving a signal output by a remote control transmitter 27 is provided. Starts the control processing shown in FIG. 5 described above when a predetermined signal indicating transition to the power saving mode is received. Here, as a transmission / reception system between the remote control transmitter 27 and the remote control receiver 26, a general method using infrared rays or the like may be adopted.

FIG. 15 is a flowchart showing the transmission control process of the remote control transmitter according to the seventh embodiment of the present invention. In response to the user pressing an operation switch (not shown) of the remote control transmitter 26, 2 shows a process performed by a microcomputer (not shown) of the transmitter.

In the figure, step S111: It is determined whether or not to use the power saving mode by detecting the operation state of the operation switch for instructing the transition to the power saving mode, and NO (use the power saving mode). If not, return.

Step S112, Step S113: If YES (use the power saving mode) in step S111, the operation state of the operation switch for instructing the manual setting of the above-mentioned predetermined time ts is detected, and NO (manual setting is performed). If not, in step S113, execution of the power saving mode using the predetermined time ts preset in the image display device is set, and the process proceeds to step S116.

Step S114, Step S115: If YES (manual setting is performed) in step S112, a desired predetermined time ts to be inputted is set (step S114), and the above-described on-screen display, reduction of display luminance, and reduction display are performed. Is set (step S1).
15), and proceed to step S116.

Step S116: A predetermined signal corresponding to the operation set in each step from step S111 to step S115 is output, and the routine returns.

According to this embodiment, the operation in the power saving mode is performed in a state desired by the user, and unnecessary image display states are eliminated, so that power consumption can be reduced efficiently.

[Eighth Embodiment] In the present embodiment, the first
The case where the display size of the display screen is changed in accordance with the number of persons watching the screen 2 will be described based on the apparatus configuration and control processing of the image display apparatus in the embodiment. That is, as the number of persons increases, the display is performed on the standard screen display in a size closer to the display size as illustrated in FIG. In the following description, a characteristic portion in the present embodiment will be mainly described, and redundant description will be omitted.

FIG. 16 is a flowchart showing a display size reduction process among the control processes executed by the microcomputer of the image display device according to the eighth embodiment of the present invention. For example, the process is executed in step S6 in FIG. I just need.

In the figure, steps S121 and S122: Whether there is only one user in front of the screen 2 by a general method such as sensing the movement of a person based on the output signal of the sensor 1 (step S121) It is determined whether two persons are present (step S122).

Steps S123 and S124: If the determination in step S112 is NO (two or more),
The standard screen display is executed as illustrated in FIG.
123), if YES (two persons), a reduced display (display reduced mode 2) larger than the display size when one person is watching is executed (step S124), and the routine returns.

Step S125: If the determination in step S121 is YES (one person), step S12
The display is executed with a smaller display size than in the case of the display reduction mode 2 of 4 (display reduction mode 1), and the routine returns.

In the present embodiment, the above-described flowchart of FIG. 16 is set in step S2 of FIG. 2. However, the present invention is not limited to this. The process of FIG. 16 is performed in parallel with the control process of FIG. By doing so, it may be executed all the time when the image display device is displaying an image. The setting of the number of persons may be configured so that the user can directly set the number.

According to this embodiment, the display size is changed in accordance with the number of people watching the display screen, thereby eliminating unnecessary image display states, thereby efficiently reducing power consumption. Can be reduced.

[Ninth Embodiment] In the present embodiment, the first
And based on the device configuration and control processing of the image display device in the seventh embodiment,
In the case where only voice is sufficient, such as a song program or news, a case where only voice is set will be described. In this case, the entire configuration diagram is the same as FIG. 14 in the seventh embodiment, and the process of setting the transition to the power saving mode is as follows.
In the configuration of the flowchart of FIG. 15 according to the seventh embodiment, it is sufficient that only audio output is set in step S115.

According to the present embodiment, the display of the image on the screen 2 is stopped in the power saving mode, so that the power consumption can be reduced efficiently.

[Tenth Embodiment] In this embodiment, the image display device is a television and displays a movie or the like based on the device configuration and control processing of the image display device in the first and third embodiments. In this case, a case will be described in which the image is not displayed while the commercial is being broadcast and the image is displayed only when bilingual broadcasting is being received. In the following description, a characteristic portion in the present embodiment will be mainly described, and redundant description will be omitted.

The circuit configuration of the image display device according to the present embodiment is different from the circuit configuration of FIG. 10 in the third embodiment in that the microcomputer 5 indicates whether the video tuner 22 has received bilingual broadcasts. The difference is that a signal is input.

FIG. 17 is a flowchart showing a display size reduction process among the control processes executed by the microcomputer of the image display device according to the tenth embodiment of the present invention. For example, the process is executed in step S6 in FIG. I just need.

In the figure, step S151: It is determined whether or not bilingual broadcasting is being received based on a signal input from the video tuner 22.

Step S152: If the determination in step S151 is NO (no reception), it can be determined that there is a high possibility that a commercial is being broadcast.
Executes reduction of the display size or only audio output, and returns.

Step S153: When the determination in step S151 is YES (during reception), it is possible to determine that there is a high possibility that a movie or the like is being broadcast, so the standard screen display is displayed as illustrated in FIG. Execute and return.

In the present embodiment, the above-described flowchart of FIG. 17 is set in step S2 of FIG. 2. However, the present invention is not limited to this. The process of FIG. 17 is performed in parallel with the control process of FIG. By doing so, it may be executed all the time when the image display device is displaying an image.

According to the present embodiment, the display screen of the screen 2 is stopped or reduced when the originally intended program is not being broadcasted. Power can be efficiently reduced.

[0082]

Further, another object of the present invention is to supply a storage medium storing a program code of software for realizing the functions of the above-described embodiment to a system or an apparatus,
Computer (or CP) of the system or device
U and MPU) can read and execute the program code stored in the storage medium.

In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

Examples of the storage medium for supplying the program code include a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, and CD.
-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS (Operating System) running on the computer based on the instruction of the program code. ) May perform some or all of the actual processing, and the processing may realize the functions of the above-described embodiments.

Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, based on the instruction of the program code, It goes without saying that the CPU included in the function expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

[0087]

As described above, according to the present invention,
By eliminating unnecessary image display states, it is possible to provide an image display device that efficiently reduces power consumption.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an entire configuration of an image display device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a circuit configuration of the image display device according to the first embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a video processing unit of the image display device according to the first embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration of an audio processing unit of the image display device according to the first embodiment of the present invention.

FIG. 5 is a flowchart illustrating a control process executed by a microcomputer of the image display device according to the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating a timer count process executed in the control process by the microcomputer of the image display device according to the first embodiment of the present invention.

FIG. 7 is a flowchart illustrating a setting process of a predetermined time executed by the microcomputer of the image display device in the control process according to the first embodiment of the present invention.

FIG. 8 is a block diagram illustrating a circuit configuration of an image display device according to a second embodiment of the present invention.

FIG. 9 is a flowchart illustrating a timer count process executed in a control process by a microcomputer of the image display device according to the second embodiment of the present invention.

FIG. 10 is a block diagram illustrating a circuit configuration of an image display device according to a third embodiment of the present invention.

FIG. 11 is a flowchart illustrating a control process executed by a microcomputer of the image display device according to the fourth embodiment of the present invention.

FIG. 12 is a front view illustrating an overall configuration of an image display device according to a sixth embodiment of the present invention.

FIG. 13 is a front view illustrating an overall configuration of an image display device according to a sixth embodiment of the present invention.

FIG. 14 is a block diagram illustrating a circuit configuration of an image display device according to a seventh embodiment of the present invention.

FIG. 15 is a flowchart illustrating a transmission control process of a remote control transmitter according to a seventh embodiment of the present invention.

FIG. 16 illustrates a control process executed by the microcomputer of the image display device according to the eighth embodiment of the present invention.
It is a flowchart which shows the reduction processing of a display size.

FIG. 17 is a flowchart illustrating a display size reduction process among control processes executed by the microcomputer of the image display device according to the tenth embodiment of the present invention.

[Description of Signs] 1: Sensor (infrared sensor, image input device, etc.), 2: Screen (CRT, PDP, cold cathode display, etc.), 3: Speaker, 4: Clock, 5: Microcomputer, 6: Image processing unit , 7: audio processing unit, 8: motion detection memory, 9: video A / D conversion unit, 10: size conversion video memory, 11: brightness control unit, 12: screen display control unit, 13: video D / A conversion unit, 14: PLL for memory writing 1, 15: Synchronization separation unit, 16: Memory writing and reading address generation unit, 17: On-screen display unit, 18: PLL for memory reading 2, 19: Memory table for voice message, 20: D / A converter for audio, 21: Message switch, 22: Video tuner for television, 3: television audio tuner, 24: antenna, 25: power saving mode display unit, 26: remote control receiver, 27: remote control transmitter,

Claims (18)

[Claims] 1. An image display apparatus for displaying an image on a display, comprising: sensing means for sensing a person; and an image to be displayed when the sensing means does not sense a person for a predetermined time. Control means for reducing or stopping the display in a part of the display area. 2. The image display device according to claim 1, further comprising a display position changing unit that changes a display position of an image reduced and displayed in the display area. 3. The image display device according to claim 2, wherein the display position changing means changes a display position of an image reduced and displayed in the display area at every second predetermined time. 4. An image display apparatus for displaying an image on a display, comprising: sensing means for sensing a person; and an image to be displayed when the sensing means does not sense a person for a predetermined time. Control means for reducing the display brightness in the display area for display or for stopping the display. 5. An image display apparatus for displaying an image on a display, comprising: sensing means for sensing a person; and stopping display of the image on the display when the sensing means does not sense a person for a predetermined time. An image display device comprising: a control unit that performs only audio output by using the control unit. 6. An image display device for displaying an image on a display device, comprising: sensing means for sensing a person; brightness reduction of a display image on a display area of the display device; and reduced display on a part of the display area. And a control means for sequentially stopping the display of the display image each time a person is not sensed for a predetermined time by the sensing means. 7. The image display device according to claim 1, further comprising a display size changing unit that separately changes the size of the display area and the image size. 8. The image display device according to claim 1, wherein said sensing means includes an infrared sensor. 9. The image display device according to claim 1, wherein said sensing means includes a sound wave sensor. 10. The image display device according to claim 1, wherein said sensing means includes a two-dimensional sensor. 11. The apparatus according to claim 1, wherein said control means displays a message indicating a transition to a power saving mode on said display when no person is detected for said predetermined time. An image display device according to any one of the above. 12. A power-saving type display element provided near the display, wherein the control means causes the display element to switch to a power-saving mode when a person is not sensed for the predetermined time. The image display device according to claim 1, wherein notification of the transition is provided. 13. The apparatus according to claim 1, wherein the control means causes a message indicating a shift to a power saving mode to be notified by voice when a person is not detected for the predetermined time. An image display device according to claim 1. 14. The image display device according to claim 1, further comprising a setting unit that automatically sets the predetermined time according to a use situation of a user. 15. The apparatus according to claim 1, further comprising setting means for setting the predetermined time to a desired time.
The image display device according to claim 6. 16. A receiving means for receiving bilingual broadcasts, wherein the control means performs an operation for reducing power consumption when the receiving means is not receiving bilingual broadcasts. The image display device according to claim 1, wherein: 17. The image display device according to claim 1, wherein the image display device is a television. 18. The image display device according to claim 1, wherein the display is a cold cathode tube.