JP2006129047A - Television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television receiver which prevents a user from forgetting power-off and reduces factors disturbing his or her sleep which are caused by variances of the sound volume and image brightness of the television receiver. <P>SOLUTION: A television receiver 1 includes; an optical sensor 4 for detecting brightness; a power switching means 11 for turning off a power source at a set time when detecting ambient darkness by the optical sensor 4; a sound volume control means 13 for reducing the sound volume with passage of time till power-off after the optical sensor 4 detects a prescribed darkness and operation of the power switching means 11 is set; and an image processing means 12 for reducing brightness of a display part 2 with passage of time. When the optical sensor 4 detects ambient darkness and an operation of turning off the power source at a prescribed time is automatically set, the sound volume and brightness of the display part 2 are reduced stepwise untill power-off. Thus factors disturbing user's sleep are reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a television receiver that is turned off at a preset time.

  Conventionally, electronic devices such as a television receiver have functions such as an off timer and a sleep timer that turn off the power at a preselected time in order to prevent forgetting to turn off the power.

  In Patent Document 1, a timer device such as a television receiver detects the brightness of the surroundings, and when it is detected that the surroundings are dark, the sleep timer is set regardless of whether or not the sleep timer is set. A timer device that automatically operates a timer and turns off the power has been proposed. Also, Patent Document 2 discloses a volume level that is stored in a non-volatile memory when an on-timer / off-timer is set. Video and audio equipment that adjusts the frequency has been proposed.

JP 2001-108772 A JP 2004-56298 A

  However, in Patent Document 1, although it is possible to prevent forgetting to turn off the power of a television receiver or the like, when the sensor as the detection means detects the ambient brightness, the ambient brightness is, for example, Since the surrounding environment varies depending on the type of fluorescent lamp installed in the user's room, etc., if the timer device is installed in a relatively dark room or an extremely bright room, the sensor There is a risk that it will not operate normally as desired by the user due to light and dark. Moreover, television receivers are generally placed near the walls and corners of a room, and the brightness varies depending on the position of the sensor that detects the brightness. Even if the sleep timer is activated by the sensor, the volume may not be reduced or the brightness of the display on the screen may not be adjusted. There is.

  Also, in Patent Document 2, in order to make it easier to sleep, the off-timer function reduces the volume so that the user's preferred volume is obtained immediately after the off-timer is set and until the power is turned off. Video and audio equipment that can be used has been proposed. However, if the video / audio device is a television receiver, for example, immediately after setting the off-timer, simply reducing the volume will cause the user to close his / her eyes to enter a sleep state while watching the video. There is a problem that fluctuations in brightness accompanying changes in the video displayed on the television receiver are affected, making it difficult to fall asleep and hindering sleep.

  The present invention has been made in view of the above problems, and automatically sets a function to turn off the power of a television receiver, such as a sleep timer, without forgetting it before sleeping, and prevents the power from being forgotten. An object of the present invention is to provide a television receiver in which the factors that hinder sleep due to changes in the volume of the television receiver and the brightness of the image after the setting of turning off is reduced as much as possible.

  The television receiver according to claim 1 of the present invention turns off the power at a preset time when the optical sensor for detecting the ambient brightness is detected and the optical sensor detects that the ambient environment has become dark. In a television receiver comprising a power supply switching means, the volume of the sound is set to a time between the time when the light sensor detects a predetermined darkness and the operation of the power supply switch means is set until the power is turned off. Volume adjustment means for reducing the brightness step by step, and video processing means for gradually reducing the brightness of the display unit for displaying the video with time.

  According to the configuration of claim 1, when it is detected that the light sensor has darkened the surrounding brightness, and the power supply is automatically set to be turned off at a predetermined time by the power supply switching means, the television receiver The volume and the brightness of the display portion are gradually reduced until the power is turned off. Therefore, when the surroundings become dark, the power is turned off without the troublesome setting of turning the power off, so that it is possible to prevent forgetting to turn off the power and to prevent sleep without adjusting the brightness and volume. It is possible to enter sleep in a state in which the obstruction of sleep associated with changes in volume and brightness is reduced as much as possible.

  A television receiver according to a second aspect of the present invention is the television receiver according to the first aspect, wherein a storage means is connected to the control means having the video processing means, the sound volume adjusting means, and the power source switching means. In this storage means, the brightness detection value for detecting the predetermined darkness of the photosensor is stored in advance, and based on the stored brightness detection value, the photosensor detects the darkness of the surroundings, The power switching means is set for operation.

  According to the configuration of the second aspect, the darkness when the power supply switching unit is set for operation is stored in the storage unit, so that it corresponds to the ambient brightness environment where the television receiver is arranged, and the desired darkness. It becomes possible to turn off the power.

  A television receiver according to a third aspect of the present invention is the television receiver according to the second aspect, wherein the optical sensor is provided at a front portion, both side portions, and an upper portion of the television receiver, and a plurality of these are arranged. The detection value of the photosensor is averaged by an input voltage averaging circuit, and the power supply switching means is set based on the average value.

  According to the configuration of the third aspect, since the operation setting is performed based on the average value of the light sensor provided with a plurality of power supply switching means, there is a change in the brightness around the television receiver placed near the wall or corner of the room. However, it is possible to turn off the power by setting the operation of the power switching means without malfunction.

  A television receiver according to a fourth aspect of the present invention is the television receiver according to any one of the first to third aspects, wherein the volume is reduced stepwise by the volume adjusting means over time. The volume setting value after the elapsed time from the operation setting of the switching means is v1, the volume setting value at the time of the operation setting of the power switching means is v, and the setting time from the operation setting of the power switching means until the power is turned off Where t is t and the elapsed time from the setting of the operation of the power supply switching means is t1, v1 is calculated by the following equation.

  According to the configuration of the fourth aspect, the volume of the television receiver is calculated according to Equation 1 until the power is turned off, and decreases with the passage of time. Therefore, it is possible to sleep while reducing the disturbing factor of sleep accompanying the change in volume that disturbs sleep.

  The television receiver according to claim 5 of the present invention is the television receiver according to claim 4, wherein the video processing means sets the operation of the power supply switching means for gradually reducing the brightness of the display unit over time. When the brightness setting value after the elapsed time from the time is b1, the brightness setting value at the time of setting the operation of the power supply switching unit is b, and the elapsed time from the setting time t / 2 is t2, b1 is It is calculated by the following mathematical formula.

  According to the fifth aspect of the present invention, the brightness of the display unit is calculated by Equation 2 until the power is turned off, and decreases with the passage of time. Therefore, it is possible to sleep while reducing the disturbing factor of sleep accompanying the change in brightness that disturbs sleep.

  According to the television receiver of claim 1 of the present invention, the optical sensor for detecting the brightness of the surroundings, and when the optical sensor detects that the surroundings have become dark, the power is turned on at the preset time set for the operation. In a television receiver comprising a power supply switching means for turning off, the sound volume is detected between the time when the optical sensor detects a predetermined darkness and the operation of the power supply switching means is set until the power is turned off. Is equipped with volume control means that reduces the brightness gradually over time and video processing means that gradually reduces the brightness of the display unit that displays the video over time. Therefore, it is possible to prevent wasteful consumption of electric power and to save energy, to solve a safety problem, and to reduce sleep disturbance as much as possible.

  According to the television receiver of claim 2 of the present invention, in the television receiver of claim 1, the storage means is included in the control means having the video processing means, the volume control means, and the power supply switching means. The brightness detection value for detecting the predetermined darkness of the optical sensor is stored in advance in the storage means, and the optical sensor detects the ambient darkness based on the stored brightness detection value. The power supply switching means is set for operation, and the television receiver can be turned off at a desired brightness.

  According to the television receiver of claim 3 of the present invention, in the television receiver of claim 2, the optical sensors are provided at the front, both sides, and the top of the television receiver, and a plurality of these are arranged. The detected value of the detected light sensor is averaged by the input voltage averaging circuit, and the power supply switching means is set based on the average value, and the power is normally turned off even if the ambient brightness changes. It becomes possible to.

  According to the television receiver of claim 4 of the present invention, in the television receiver according to any one of claims 1 to 3, the sound volume is reduced stepwise by the sound volume adjusting means over time. The volume setting value after the elapsed time from the operation setting of the power supply switching means is set to v1, the volume setting value at the time of operation setting of the power supply switching means is v, and from the time of the operation setting of the power supply switching means until the power is turned off V1 is calculated by the following equation, where t is the set time of t and t1 is the elapsed time from the operation setting of the power supply switching means.

  Therefore, it is possible to enter sleep in a state where sleep obstructing factors associated with changes in volume that hinder sleep are reduced, and awakening during sleep can be suppressed.

  According to the television receiver of the fifth aspect of the present invention, in the television receiver according to the fourth aspect of the present invention, the power supply switching means for stepwise reducing the brightness of the display unit over time by the video processing means. B1 when the brightness setting value after the elapsed time from the operation setting time is b1, the brightness setting value at the operation setting of the power supply switching unit is b, and the elapsed time from the setting time t / 2 is t2. Is calculated by the following equation.

  Therefore, it is possible to enter sleep in a state where sleep disturbing factors associated with changes in brightness that interfere with sleep are reduced, and it is possible to suppress waking up during sleep.

  Hereinafter, an embodiment as the best mode for carrying out the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view of a television receiver according to an embodiment of the present invention. As shown in the figure, the overall shape of the television receiver 1 is formed in a substantially box shape, and is formed at the center of the front portion thereof. Is provided with a display 2 for displaying video. The cabinet 3 of the television receiver 1 is provided with optical sensors 4 at the front, upper, and both sides thereof.

  FIG. 2 is a block diagram showing a schematic configuration of the television receiver. The television receiver 1 is provided with the plurality of optical sensors 4 described above, and the input voltage input from the optical sensors 4 to the input voltage averaging circuit 5 is averaged by the input voltage averaging circuit 5, and the average value thereof is obtained. Is converted to a digital signal by the A / D converter 6 and then output to the microcomputer 7 as control means. The average value output to the microcomputer 7 is stored as data in a memory 8 as storage means connected to the microcomputer 7.

  The television receiver 1 includes video signal processing means 10 such as a chroma IC to which an output signal from the microcomputer 7 is input. The video signal processing means 10 causes the display unit 2 to display an image on the screen. The microcomputer 7 has an off-timer function as a so-called sleep timer function that turns off the power of the television receiver 1 by measuring time. More specifically, the power switching unit 11 of the microcomputer 7 sets the operation. Then, the power of the television receiver 1 is turned off by outputting a signal for turning off the power to the power supply block 9 at a preset time.

  When the optical sensor 4 detects a predetermined darkness in the surroundings, the microcomputer 7 is set to operate the power supply switching means 11, and from this time until the power of the television receiver 1 is turned off, the display unit Video processing means 12 for gradually reducing the brightness of 2 with the passage of time, volume control means 13 for gradually reducing the volume of the sound output from the speaker 14 with the passage of time, and the like. The menu screen is displayed on the display unit 2 by operating the operation key 21 of the remote controller 20 that can remotely operate the television receiver 1, and a predetermined operation setting is performed by the operation key 21 while viewing the menu screen. The brightness setting value (b) at the time of setting the operation of the power supply switching means as a reference when the brightness of the unit 2 is lowered, and at the time of setting the operation of the power supply switching means as a reference when reducing the volume of the volume control means Numerical values such as the volume setting value (v) can be stored in the memory 8 as data, and the brightness setting value (b) and the volume setting value (v) stored in the memory 8 are calculated by Equations 1 and 2 described later. As a result, the video processing means 11 gradually decreases the brightness of the display unit 2, and the volume adjusting means 12 is based on the volume setting value (v) stored in the memory 8. The volume that is output from the speaker 14 can be lowered stepwise.

  Next, the operation procedure of the television receiver will be described. FIG. 3 is a menu screen 30 of “automatic sleep timer setting” displayed on the display unit 2 by operating the operation key 2, and the operation setting of the power switching means 11 for turning off the power by operating the operation key 21. Can be set on the menu screen 30. The operation procedure is “automatic sleep”. When “OFF” is selected with the operation key 21 of ON / OFF here, the power switching means 11 as an off-timer function is set to operate. .

  In addition, when “Time setting” is set to “22:00” and “2 hours” on the menu screen 30, after 22:00, the remote controller 20 is set for a predetermined time (2 hours). If no operation of the plurality of operation keys 21 is operated, the power switching means 11 as an off-timer function is automatically set for operation, and the television receiver 1 is turned off until the power is turned off. For example, when “OSD display interval” is set to “10 seconds / 10 minutes” during operation of the timer function, it is displayed that the off timer function is in operation for 10 seconds at a predetermined time interval of 10 minutes. An OSD (on-screen display) is displayed on the unit 2.

  FIG. 4 is a brightness sensor setting screen 31 displayed on the display unit 2 by the operation of the menu key 21 a included in the operation key 21. By operating the menu key 21a, the brightness sensor setting screen 31 is displayed on the display unit 2, and the brightness level of the display unit 2 is adjusted by repeatedly pressing the ENTER key 21b included in the operation key 21 of the remote controller 20. Thus, the user can appropriately adjust the reference level of brightness when it is detected that the surroundings by the optical sensor 4 have become dark, and can be stored as data in the memory 8.

  FIG. 5 shows a display example of the display screen 32 in which “sleeping timer is being executed” is displayed on the display unit 2 in the operation setting state of the power switching unit 11 as an off timer function. When the operation is set, as shown in FIG. 5, “automatic” characters are displayed at the upper corner of the display unit 2 and “good night” and “timer 80” are displayed at the lower corner. . Note that “80” of the “timer 80” is the remaining time until the power of the television receiver 1 is turned off.

  FIG. 6 shows a step-by-step image of the volume (volume) with the passage of time from the time of setting the operation of the power switching means of the television receiver until the power is turned off, and the brightness and contrast (light / dark) of the display unit 2. It is explanatory drawing which shows the volume / video processing method at the time of reducing. It should be noted that the numerical values of the set values such as the volume and the brightness are such that the larger the numerical value is, the larger the volume is and the brighter the brightness is.

  As for the sound processing method, when the operation of the power supply switching means 11 is set, that is, the time when the power supply switching means 11 as the off timer function is set for operation and the current volume setting value or the average value of the volume setting values are obtained. In order to decrease the volume step by step from the volume setting value v at the time of setting the operation of the power supply switching means 11 every time, the volume setting value after the elapsed time from the time of setting the operation of the power supply switching means 11 according to the following formula 1 The volume control means 13 calculates v1.

  Note that v1 is a volume setting value after an elapsed time from the time of setting the operation of the power supply switching means 11, v is a volume setting value when the operation setting of the power supply switching means 11 is set, and t is a power supply from the time of setting the operation of the power supply switching means 11. The set time until turning off, t1, is an elapsed time from the time when the operation of the power supply switching means 11 is set.

  For example, when the user watches the volume setting value v at 30, the volume after 1 hour is 30− (30/2) × 1 when substituted in the above equation 1, so the volume is half of 15. Become.

  Further, with regard to the video processing method, when the control is performed so that the brightness (BRIGHT) as the brightness is lowered step by step from the beginning when the operation of the power supply switching unit 11 is set, the display screen itself of the display unit 2 is crushed in black and uncomfortable. Therefore, with respect to the brightness (BRIGHT), the sound volume adjusting unit 13 calculates the brightness setting value b1 after an elapsed time from the time when the operation of the power supply switching unit 11 is set, according to Equation 2. That is, the video processing means 12 starts video processing for gradually reducing the brightness of the video after one hour has elapsed since the operation setting of the power supply switching means 11.

  In addition, b1 is a brightness (bright) set value after an elapsed time from the time when the operation of the power supply switching unit 11 is set, b is a brightness setting value when the operation of the power supply switching unit 11 is set, and t2 is from the set time t / 2. The elapsed time.

  As for the contrast (CONTRAST) of the display unit 2, as in the sound volume processing method, when the operation of the power switching unit 11 is set, that is, the time t when the power switching unit 11 as the off timer function is set and the current time An average value of the contrast setting values is obtained and gradually decreased from the contrast setting value initially set for each elapsed time. The microcomputer 7 calculates the contrast setting value c1 after the elapsed time according to Equation 3. The microcomputer 7 reduces the contrast of the display unit 2 step by step.

  Note that c1 is a contrast setting value after an elapsed time from the time when the operation of the power supply switching unit 11 is set, and c is a contrast setting value when the operation of the power supply switching unit 11 is set.

  Further, the remaining time until the power is turned off can be displayed on the display unit 2 at a predetermined interval such as every 10 minutes. If there is no operation by the operation key 21 of the remote controller 20, the above processing is performed. On the other hand, when any operation such as change of time to turn off the power supply, volume adjustment or menu adjustment is performed by the operation key 21, the operation setting of the power supply switching means 11 is not performed. It is judged that there was a pleasant feeling, and it returns to the original setting value and is canceled. Then, the process for the remaining time is performed again after returning to the original state. However, if the remaining sleep time is less than 30 minutes, this process is not performed because the change is abrupt. Note that the processing is continued when the channel of the television receiver is switched by the operation key 21 of the remote controller or the like.

  Next, further description will be given with reference to the flowchart shown in FIG. When it is detected that the sensitivity of the optical sensor 4 is equal to or lower than a predetermined setting and the ambient brightness has become a predetermined darkness (step 1), the power supply switching means 11 as an off timer function is automatically set for operation (step) 2). At this time, when the power source switching means 11 is not set for operation, the processing is stopped here (step 3). Further, when the operation of the power switching unit 11 is set in step 2, the power switching unit 11 as an off-timer function is executed (step 4), and the set time / 2 is calculated (step 5). If “NO”, the microcomputer 7 calculates Equations 1 and 2 and returns to Step 5. On the other hand, if “YES”, the microcomputer 7 calculates Equations 1, 2, and 3 (Steps 6, 7, and 8), and the operation key 21 is not operated until the power is turned off. At (Step 11), the time is up and the power is turned off at a predetermined time (Steps 11, 12, and 13). If the time is not up in step 12, the process returns to step 5.

  In step 14, if the user does not operate the operation key 21 or the menu key 21a (step 14), for example, to adjust the volume, the process proceeds to step 11; If the remaining time until the power is turned off is 30 minutes or less (step 15), the volume / brightness / contrast values which are gradually reduced by the formulas 1, 2, and 3 are restored to the original values. (Step 16), the normal operation process is continued.

  If the remaining time until the power is turned off in step 15 is not 30 minutes or less, processing is performed in the same procedure as in steps 6, 7, and 8 based on the remaining time (step 18). If there is no operation of the operation key 21 in step 19, the process returns to step 12, while if the operation key 21 is operated, the process returns to step 15.

  Thus, when the power of the television receiver 1 is automatically set to be turned off at a predetermined time, the output from the speaker 14 from the set time until the power is turned off is output. The sound volume, the brightness of the image on the display unit 2 and the contrast are adjusted so as to decrease step by step according to Equations 1-3.

  As described above, according to the present embodiment, the sound volume is adjusted according to the passage of time between the time when the light sensor 4 detects a predetermined darkness and the operation of the power supply switching means 11 is set and the power is turned off. Volume adjusting means 13 for reducing the brightness of the display, and video processing means 13 for gradually reducing the brightness of the display unit 2 for displaying the video as time passes. The light sensor 4 darkens the ambient brightness. When the power is automatically set to turn off the power at a predetermined time by the power switching means 11, the power of the television receiver 1 and the brightness of the display unit 2 are turned off. The power is turned off without the troublesome setting of turning off the power when the surroundings become dark, so it is possible to prevent forgetting to turn off the power and wasteful consumption of electricity. Can prevent the brightness And without adjusting the volume, excellent convenience because it can enter the sleep state in which as much as possible reduce the disturbed sleep due to a change in the volume and brightness hinder sleep.

  Further, a brightness detection value for detecting a predetermined darkness of the optical sensor 4 is stored in the memory 8 in advance by operating the operation key 21 of the remote controller 20 in the memory 8 connected to the microcomputer 7 as the control means. On the basis of the detected brightness value, the light sensor 4 detects the darkness of the surroundings, the power switching means 11 is set to operate, and is made to correspond to the surrounding brightness environment where the television receiver 1 is arranged, The power can be turned off at a desired darkness.

  Moreover, the photosensors 4 are provided at the front, both sides, and the top of the television receiver 1, and the input voltage averaging circuit 5 averages the detection values of the plurality of photosensors 4 to obtain the average value. Since the power switching unit 11 is set based on the operation, for example, the power switching unit 11 is not affected by the change in brightness around the television receiver 1 arranged at the wall or corner of the room. The operation is normally set in the dark, and the power of the television receiver 1 can be turned off.

  Further, the volume setting value v1 after the elapsed time when the volume is lowered stepwise by the volume by the volume adjusting means 13 is calculated by Equation 1.

  Accordingly, the volume of the television receiver 1 is calculated according to Equation 1 until the power is turned off, and is reduced with the passage of time, thereby reducing sleep disturbing factors associated with changes in volume that hinder sleep. It is possible to wake up while sleeping, and to wake up in the middle of sleep and to solve the lack of sleep.

  In addition, the brightness setting value b1 after the elapsed time during which the brightness of the display unit 2 is decreased stepwise by the video processing means 12 is calculated by Equation 2.

  Therefore, it is possible to fall asleep while reducing sleep obstructing factors associated with changes in brightness that hinder sleep, and it is possible to eliminate waking up during sleep and lack of sleep.

  In addition, since the television receiver 1 is set to be automatically turned off when the user is sleeping, for example, an electrical failure occurs in the television receiver 1 during sleep. It is excellent in safety because it can avoid the occurrence of fire.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, although the operation of the television receiver 1 is performed by the operation key 21 of the remote controller 20, the operation is not limited to the operation key 21, and various operation buttons provided on the television receiver are used instead. Also good.

It is a perspective view which shows the television receiver of one Example of this invention. It is a block diagram which shows schematic structure of a television receiver same as the above. It is explanatory drawing which shows the menu screen displayed on the display part same as the above. It is explanatory drawing which shows the brightness sensor setting screen displayed on the display part same as the above. It is explanatory drawing which shows the example of a display of a display screen same as the above. It is explanatory drawing which shows a volume / video processing method same as the above. It is a flowchart figure which shows an operation | movement procedure same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Television receiver 2 Display part 4 Optical sensor 5 Input voltage average circuit 7 Microcomputer (control means)
8 Memory (memory means)
DESCRIPTION OF SYMBOLS 11 Power supply switching means 12 Image | video processing means 13 Volume control means b Brightness setting value at the time of operation setting b1 Brightness setting value after the elapsed time from the time of operation setting of power supply switching means t Power supply from the time of operation setting of power supply switching means Setting time until turning off t1 Elapsed time from setting operation of power supply switching means t2 Elapsed time from setting time t / 2 v Volume setting value when setting operation of power supply switching means v1 From setting operation of power supply switching means Volume setting value after the elapsed time of

Claims (5)

  In a television receiver comprising a light sensor for detecting ambient brightness and a power switching means for turning off the power at a preset time when an operation is detected when the light sensor detects that the surrounding has become dark. Volume adjustment means for stepwise decreasing the volume as time elapses from when the light sensor detects a predetermined darkness and when the operation of the power supply switching means is set to when the power is turned off; A television receiver, comprising: video processing means for gradually reducing the brightness of a display unit for displaying video over time.   A storage means is connected to the control means having the video processing means, the volume control means, and the power supply switching means, and a brightness detection value for detecting a predetermined darkness of the photosensor is stored in advance in the storage means. The television receiver according to claim 1, wherein the optical sensor detects ambient darkness based on the stored brightness detection value, and the power supply switching means is set to operate.   The optical sensor is provided at the front, both sides, and the top of the television receiver, and the detected values of the plurality of optical sensors are averaged by an input voltage averaging circuit, and the power source switching means is based on the average value. The television receiver according to claim 2, wherein the operation is set. The volume setting value after the elapsed time from the time of setting the operation of the power supply switching means where the volume is lowered stepwise by the volume adjustment means is set to v1, and the volume setting value when the operation setting of the power supply switching means is set to v1. , V1 is calculated by the following equation, where t is the set time from when the operation of the power supply switching unit is set to the power is turned off, and t1 is the elapsed time from the operation setting of the power supply switching unit. The television receiver according to any one of claims 1 to 3.

The brightness setting value after the elapsed time from the setting time of the power supply switching means for gradually decreasing the brightness of the display unit with the passage of time by the video processing means is b1, and the brightness at the time of the operation setting of the power supply switching means. 5. The television receiver according to claim 4, wherein b1 is calculated by the following equation, where b is a set value and t2 is an elapsed time from a set time t / 2.

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