JP2008079076A - Television receiver, and its saving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the point at issue that a conventional television receiver displays a warning when it is expected that a power consumption amount exceeds a target value, but as a power saving operation is conducted by a user, it is troublesome for the user to actually conduct the power saving operation or the user does not actually conduct the power saving operation, so that no effect appears occasionally. <P>SOLUTION: A television receiver comprising a liquid crystal panel comprises a power saving target function setting means for setting a power saving target period and a power saving target value, a power consumption amount calculating means for acquiring a power consumption amount from a start point of the power saving target period, and a backlight brightness reducing means for reducing a brightness of a backlight of the liquid crystal panel when the power consumption amount acquired by the power consumption amount calculating means reaches a given ratio to the power saving target value. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a television receiver and a power saving method therefor, and more particularly, a television suitable for achieving power saving by managing an integrated value of power consumption of a television receiver including a liquid crystal panel (liquid crystal display device). The present invention relates to a John receiver and its power saving method.

Conventionally, in an electronic device such as a television receiver, the power consumption is managed so as not to increase, and when a predetermined target power consumption is reached, a warning message is displayed on the screen or the power consumption up to the present time. Is displayed to increase awareness of power saving.
For example, Japanese Patent Application Laid-Open No. 2000-162255 (Patent Document 1) proposes an electronic device designed to increase awareness of power saving. According to this gazette, the time from the start date of management of power consumption, the time used in the power saving mode, and the off time are measured, the integrated value is stored in the storage means, and the value is stored as time passes. It is updated, and when the user requests display of power consumption, the power consumption from the start date is calculated and the result is displayed. Further, a target power consumption amount for a predetermined period is set from the start date, and a warning is generated when the predicted power consumption amount for the predetermined period exceeds the target power consumption amount.
JP 2000-162255 A

  Although the above prior art is intended to generate a warning when the power consumption is expected to exceed the target value and to raise the user's power saving awareness, the power saving operation is performed by the user himself. There are cases where it is troublesome to actually perform the power saving operation, or there is a case where the effect is not achieved, such as not actually saving power due to familiarity. Therefore, in view of the above problems, an object of the present invention is to automatically save power without a user's operation so that the power saving effect can be obtained.

The television receiver of the present invention is a television receiver having a liquid crystal panel. The power saving target function setting means for setting the power saving target period and the power saving target value, and the power consumption amount is obtained from the starting point of the power saving target period. Backlight brightness reduction for reducing the backlight brightness of the liquid crystal panel when the power consumption calculated by the power consumption calculation means and the power consumption calculated by the power consumption calculation means reach a predetermined ratio with respect to the power saving target value Means are provided.
Further, in the television receiver of the present invention, the power saving target function setting means includes means for setting a ratio to a power saving target value for starting a warning, and the power consumption calculated by the power consumption calculation means is the power consumption target value. A warning display means for displaying a warning that the brightness of the backlight is set to the energy saving mode when the ratio to the power saving target value for starting the warning is reached is provided.
In the television receiver of the present invention, the power consumption from the start point of the power saving target period obtained by the power consumption calculation means after the backlight brightness is reduced by the backlight brightness reduction means. Is provided with power-off means for turning off the power when the power-saving target value is reached.
The television receiver of the present invention is a television receiver equipped with a liquid crystal panel, and a power saving target function setting means for setting a power saving target period and a power saving target value; and a power charge from the starting point of the power saving target period. And a backlight luminance reduction means for reducing the luminance of the backlight of the liquid crystal panel when the electric charge calculated by the electric power charge calculation means reaches a predetermined ratio with respect to the power saving target value. It is characterized by having.
Further, the television receiver of the present invention is a television receiver having a liquid crystal panel, a power saving target function setting means for setting a power saving target period and a power saving target value, and a power consumption amount from a starting point of the power saving target period. Power consumption calculating means for determining the power consumption, and when the predetermined amount of time until the power consumption calculated by the power consumption calculating means reaches the power saving target value is reached, a warning for turning off the power is started. A power-off means for turning off the power when the predetermined time has elapsed after the start is provided.
In the television receiver of the present invention, the power saving target function setting means includes warning start time setting means for setting a warning start time until the power consumption reaches a power saving target value, and the power consumption calculation means And a warning display means for displaying a warning that the power is turned off after a predetermined time when the power consumption determined in step (b) reaches the warning start time.
The television receiver of the present invention is a television receiver equipped with a liquid crystal panel, and a power saving target function setting means for setting a power saving target period and a power saving target value; and a power charge from the starting point of the power saving target period. A power charge calculation means to be obtained, and a power supply OFF means for turning off the power supply when the power charge calculated by the power charge calculation means reaches the power saving target value.
The power saving method of the present invention is a power saving method for a television receiver equipped with a liquid crystal panel, wherein a power saving target period and a power saving target value are set, a power consumption is determined from a starting point of the power saving target period, and the calculation is performed. The backlight brightness of the liquid crystal panel is reduced when the amount of consumed power reaches a predetermined ratio with respect to the power saving target value.
The power saving method of the present invention is a power saving method for a television receiver equipped with a liquid crystal panel, wherein a power saving target period and a power saving target value are set, a power consumption is determined from a starting point of the power saving target period, and the calculation is performed. The power is turned off when the amount of consumed power reaches the power saving target value.
The power saving method of the present invention is a power saving method for a television receiver equipped with a liquid crystal panel, wherein a power saving target period and a power saving target value are set, a power charge is obtained from a starting point of the power saving target period, The backlight brightness of the liquid crystal panel is reduced when the power charge reaches a predetermined ratio with respect to the power saving target value.
The power saving method of the present invention is a power saving method for a television receiver equipped with a liquid crystal panel, wherein a power saving target period and a power saving target value are set, a power charge is obtained from a starting point of the power saving target period, The power is turned off when the power charge reaches the power saving target value.

  According to the present invention, when the predetermined amount of power consumption is reached, power saving can be automatically executed such as actually turning off the power supply or reducing the brightness of the backlight. However, the power saving effect can be achieved.

  Next, the best mode for carrying out the present invention will be specifically described with reference to the drawings.

(First embodiment)
FIG. 1 shows a first embodiment in which the present invention is applied to a television receiver provided with a liquid crystal panel (liquid crystal display device) capable of adjusting screen luminance by a backlight.

  In FIG. 1, 1 is an example of a television receiver to which the present invention is applied. A control unit 2 includes a microcomputer and controls the entire television receiver 1. Reference numeral 3 denotes an antenna for receiving broadcast program radio waves. A tuner 4 selects a desired channel from a radio signal received by an antenna. Reference numeral 5 denotes an external signal input unit to which video signals, audio signals, and the like are input from externally connected devices such as DVDs, video devices, and hard disk devices. Reference numeral 6 denotes an input switching unit that selects and outputs either a signal from the tuner 4 or a signal from the external signal input unit 5.

  Reference numeral 7 denotes a decoder. Since the video signal is input to the decoder 7 in a compressed and encoded state, the decoder 7 decompresses the video signal and performs a decoding process to return it to a signal that can be processed by the video signal processing unit 8. .

  Reference numeral 8 denotes a video signal processing unit. The digital video signal output from the decoder 7 is input to the video signal processing unit 8. The video signal processing unit 8 performs interlace and progressive conversion, R (red), G (green), and B (blue) signal generation, multi-screen composition processing, OSD display composition processing, and the like.

  Reference numeral 9 denotes an LCD controller. Reference numeral 11 denotes a liquid crystal panel. The digital video signal output from the video signal processing unit 8 is input to the LCD controller 9. The LCD controller 9 scans the screen of the liquid crystal panel 11 based on the synchronization signal, and displays the selected broadcast program on the screen of the liquid crystal panel 11. In FIG. 1, the audio output unit is not shown.

  Reference numeral 10 denotes an OSD circuit, which outputs OSD display information to the video signal processing unit 8 according to a command from the control unit 2, and the video signal processing unit 8 performs OSD display such as various character information and setting menus based on the OSD display information. For video synthesis.

  In FIG. 1, reference numeral 12 denotes a backlight control unit, and reference numeral 13 denotes a backlight using a cold cathode tube, an LED or the like as a light source. A hybrid type in which a cold cathode tube and an LED are used in combination can also be used.

  When a cold cathode tube is used for the backlight 13, the backlight control unit 12 includes a boosting inverter for applying a high voltage of several thousand volts to the cold cathode tube.

  Reference numeral 14 denotes an operation unit which indicates a remote controller (hereinafter referred to as a remote controller), operation buttons provided on the main body of the television receiver 1, and the like. Reference numeral 15 denotes a clock / timer unit having a clock function and a clock function for accumulating time by using the clock function.

  Reference numeral 16 denotes a memory, which includes a ROM, a RAM, and the like. The memory 16 stores functions and functions of the television receiver and programs and data for the microcomputer of the control unit 2 to execute the operation of the present invention, and temporarily stores various data during program execution. In addition, the calculation result data is stored. In addition, the setting information of the power saving target function is stored in a readable / writable nonvolatile memory (such as EEPROM) so that the data is not lost even when the power is turned off.

  Reference numeral 17 denotes a power circuit, which performs power ON / OFF switching control or enters a power standby state as required for the power saving operation of the present invention.

  Reference numeral 18 denotes a program information processing unit that acquires various data related to a program input from the tuner 4 or the external signal input unit 5 and outputs the data to the control unit 2. As program information, for example, there is data supplied by an EPG (electronic program guide), and information on the genre of the program can be acquired.

  Next, the operation of the present embodiment will be described with reference to the flowchart of FIG. The embodiment shown in FIG. 2 reduces the brightness of the backlight when it reaches a predetermined power consumption (for example, 80% of the target power consumption) before reaching the target power consumption. When the amount of power is reached, the power is turned off to save power. In this processing, the program is executed by a microcomputer provided in the control circuit 2.

  When the power saving target function is set in the present embodiment, a flag indicating that the power saving target function has been set is set, and further, a power saving target period (start date-end date), power saving target value [kWH], warning Items such as a ratio with respect to the power saving target value for starting (in the case of FIG. 2, it is set to 80%, but is not limited to this) are set. In the present embodiment, the case where the power saving target function is set at the time of starting the processing and the case where the power saving target function is set during the processing (when set in step S3) are included. In the above, as the power saving target function items, the power saving target period, the power saving target value, and the ratio to the power saving target value for starting the warning are set, but the present invention is not limited to this.

  First, in step S1, a flag is checked to determine whether the power saving target function is set. In step S1, if the power saving target function is not set, it is checked in step S2 whether the power saving target function button is pressed. The power saving target function button is provided on the operation unit 14, for example, as one of the operation buttons of the remote controller.

  In step S2, when pressing of the power saving target function button is not detected, the process returns to step S1 and the processing is continued. In step S2, when pressing of the power saving target function button is detected, a flag indicating that the power saving target function is set is set in step S3, and the process returns to step S1.

  If the power saving target function is set in step S1, the process proceeds to step S4. In step S4, it is checked whether the items as the power saving target function (power saving target period, power saving target value, ratio to the power saving target value for starting warning, etc.) are set. If the item as the power saving target function is set, the process proceeds to step S5.

  In step S5, a power saving target period (for example, January 1 to January 31), a power consumption amount xxx [kWH] from the start of the power saving target period, a power saving target value, a ratio to the power saving target value (for example, 55%), and the like. Is displayed on the OSD. The user can arbitrarily set the power saving target period such as one month or one week.

  After the OSD display is made in step S5, the process proceeds to step S6, and time measurement for integrating the power consumption is started. In the case of a liquid crystal display device, as shown in FIG. 3, when the backlight brightness is the same, the power consumption is almost the same. Therefore, the power consumption is obtained by measuring the time and multiplying the power consumption. When the backlight brightness decreases, the power consumption corresponding to the backlight brightness may be multiplied by the time measured.

  On the other hand, when the item as the power saving target function is not set in step S4, the case where only the flag for the power saving target function is set in step S3 in the middle of the processing is shown. In this case, the process proceeds to step S7. Proceed, power saving target period (start date-end date), power saving target value [kWH], ratio to the power saving target value for starting warning (in this embodiment, it is set to 80%, but is not limited to this) ) Etc. are set. In this case, OSD display for prompting input of these items is performed.

  After each item of the power saving target function is set in step S7, the process proceeds to step S6, and time measurement for integrating the power consumption is started.

  After the time measurement is started in step S6, it is checked in step S8 how much power is consumed with respect to the power saving target value. In the present embodiment, it is checked whether or not 80% of the power saving target value has been reached. If 80% of the power saving target value has not been reached, the process returns to step S6 and continues.

  If it reaches 80% of the power saving target value in step S8, the process proceeds to step S9, and a power saving warning message is displayed in OSD. For example, the message “Set backlight to energy saving mode” is displayed.

  The user determines whether to continue the power saving target function in step S10 by looking at the OSD display of the warning message. Depending on the contents of the program, there is a case where it is not desired to lower the brightness of the backlight. In this case, the power saving target function is not continued (NO). This determination may be made in step S10 by performing OSD display for selecting the power saving target function and selecting whether to continue or not.

  Alternatively, in step S10, an OSD display “Do you want to continue the power saving target function?” Is performed, and a specific button on the remote controller is operated to proceed to step S18 to end the power saving target function. At this time, when the user does not operate a specific button on the remote controller for a predetermined time (for example, several tens of seconds), the power saving target function may be continued and the process proceeds to step S11. In this way, the power saving target function is continued unless a specific button on the remote control is actively operated, so that the power saving effect is improved.

  If it is determined in step S10 that the power saving target function is not to be continued (NO), in step S18, the power saving target function setting flag is lowered, and the time counting for counting the power consumption is terminated, and the flow returns to step S1. Return. After returning to step S1, it will circulate between step S1 and step S2 until pressing of the power saving target function button is detected in step S2.

  If it is determined in step S10 that the power saving target function is to be continued (YES), the process proceeds to step S11, and the luminance of the backlight is lowered. FIG. 4 shows an embodiment at this time. After the OSD display of the warning message is started, the backlight brightness is 50 at the point of the power saving start power amount (P1 point) at which the actual power saving is started. %. Note that the level of backlight brightness to be reduced at the point P1 of the power saving start power amount is not limited to 50% in this example.

  Next, the process proceeds to step S12, and time measurement is started in order to calculate the amount of power consumption based on the power consumption when the backlight luminance is reduced. The power consumption when the backlight is set to the energy saving mode is calculated from the relationship between the backlight luminance and the power consumption in FIG. 3 and the power consumption corresponding to the backlight luminance of 50% and the time counted during this period. It is calculated by the product of

  In step S13, it is checked whether or not a power-off operation has been performed. This is a check for checking whether or not the user has turned off the power by himself / herself, and is a process corresponding to the case where the user has turned off the power by himself / herself even though the target power consumption has not been reached.

  If it is detected in step S13 that the power has been turned off (in the case of YES), the process proceeds to step 15, where the current power consumption is bb [kWH], and the power consumption from January 1 when the power saving target period starts. The amount is ccc [kWH] and the backlight power saving mode is OSD-displayed for a predetermined time.

  In step S16, the daily power consumption and the cumulative power consumption are set in the memory, and the power is turned off in step S17. The power-off process in step S17 may be a process of turning off the power completely, even when the power is turned off in the power standby state. These can be implemented by known techniques and will not be described in detail.

  If it is not detected in step S13 that the power has been turned off (NO), the process proceeds to step 14 to check whether the target power consumption has been reached. This is a process of checking whether or not the target power consumption has been reached when the user does not perform any operation despite the warning message regarding power saving being displayed. When the target power consumption has not been reached in step S14 (in the case of NO), the process returns to step S12, and the process of the backlight luminance of 50% is continued.

  In step S14, when it is detected that the target power consumption is reached (in the case of YES), the process proceeds to step S15, where the current power consumption is bb [kWH], from the power saving target period start time January 1st. OSD is displayed for a predetermined time that the power consumption amount is ccc [kWh] and the backlight power saving mode. In step S16, the daily power consumption and the cumulative power consumption are set in the memory, and the power is turned off in step S17. The power-off process in step S17 may be a process of turning off the power completely, even when the power is turned off in the power standby state. The power-off process in this case is a process when the power consumption amount in FIG. 4 reaches the point (P2) of the power saving target power amount (100%).

  In the above description, the backlight brightness is reduced to 50% when the power consumption reaches 80%, and the power is turned off when the power consumption reaches 100%. The backlight brightness may be lowered stepwise by dividing the P2 point of the power saving target power amount into a plurality of sections. Or you may make it reduce continuously according to power consumption (it shows with a dashed-dotted line). The setting information of the power saving target function is stored in a nonvolatile memory (for example, EEPROM). Thus, when the power is turned on next time, the setting state of the power saving target function can be known from the information stored in the nonvolatile memory.

(Second Embodiment)
Next, the operation of the present embodiment will be described with reference to the flowchart of FIG. In the embodiment shown in FIG. 5, when the time until reaching the power saving target value reaches a predetermined value, a warning message until the power is turned off is displayed in OSD, and predetermined when the user does not select whether or not to continue the power saving target function. The power is saved by turning off the power after a lapse of time. The control configuration of the television receiver in this embodiment can be the same as that shown in FIG. 1 as in the first embodiment. In this processing, the program is executed by a microcomputer provided in the control circuit 2.

  When the power saving target function is set in the present embodiment, a flag indicating that the power saving target function is set is set as in the first embodiment, and further, a power saving target period, a power saving target value, a warning are set. Items such as start time are set. The present embodiment also includes the case where the power saving target function is set at the time of starting the processing and the case where the power saving target function is set during the processing (step S23).

  First, in step S21, a flag is checked whether the power saving target function is set. In step S21, if the power saving target function is not set, it is checked in step S22 whether the power saving target function button has been pressed. The power saving target function button is provided on the operation unit 14, for example, as one of the operation buttons of the remote controller.

  In step S22, when pressing of the power saving target function button is not detected, the process returns to step S21 and the processing is continued. If pressing of the power saving target function button is detected in step S22, a flag indicating that the power saving target function is set is set in step S23, and the process returns to step S1.

  If the power saving target function is set in step S21, the process proceeds to step S24. In step S24, it is checked whether items (power saving target period, power saving target value, warning start time, etc.) as the power saving target function are set. When the item as the power saving target function is set, the process proceeds to step S25.

  In step S25, the power saving target period (for example, January 1 to January 31), the power consumption amount xxx [kWH] from the start of the power saving target period, the power saving target value, the time to the power saving target value (bb time), etc. Is displayed on the OSD. The user can arbitrarily set the power saving target period such as one month or one week.

  After the OSD display is made in step S25, the process proceeds to step S26, and time measurement for integrating the power consumption is started. In the case of a liquid crystal display device, as shown in FIG. 3, when the backlight brightness is the same, the power consumption is almost the same. Therefore, the power consumption is obtained by measuring the time and multiplying the power consumption. When the backlight brightness decreases, the power consumption corresponding to the backlight brightness may be multiplied by the time measured.

  On the other hand, when the item as the power saving target function is not set in step S24, the case where only the flag for the power saving target function is set in step S23 in the middle of the processing is shown. In this case, the process proceeds to step S27. Items such as progress, power saving target period (start date-end date), power saving target value [kWH], warning start time (in this embodiment, it is set one hour ago, but is not limited to this) Is set. In this case, OSD display for prompting input of these items is performed.

  After each item of the power saving target function is set in step S27, the process proceeds to step S26, and time measurement for integrating the power consumption is started.

  After timing is started in step S26, it is checked in step S28 how long it takes to reach the power saving target value. In the present embodiment, it is checked whether or not the time until reaching the power saving target value is one hour ago. If the time until the power saving target value is reached is longer than 1 hour, the process returns to step S26 to continue the process.

  If it is detected in step S28 that the time required to reach the power saving target value is within one hour, the process proceeds to step S29, and a power saving warning message is displayed on the OSD. For example, the message “Power will be turned off after one hour” is displayed.

  The user determines whether to continue the power saving target function in step S30 by looking at the OSD display of the warning message. Depending on the contents of the program, there is a case where it is not desired to turn off the power. In this case, the power saving target function is not continued (NO). This determination may be made in step S30 by performing OSD display for selecting the power saving target function and selecting whether to continue or not.

  Alternatively, in step S30, an OSD display “Do you want to continue the power saving target function?” Is performed, and a specific button on the remote controller is operated to proceed to step S36 to end the power saving target function. At this time, when the user does not operate a specific button on the remote controller for a predetermined time (for example, several tens of seconds), the power saving target function may be continued and the process proceeds to step S31. In this way, the power saving target function is continued unless a specific button on the remote control is actively operated, so that the power saving effect is improved.

  If it is determined in step S30 that the power saving target function is not continued (NO), in step S36, the time counting for counting the power consumption is terminated, and the process returns to step S21. In this case, the power saving target function setting flag is lowered. After returning to step S21, the process circulates between step S21 and step S22 until pressing of the power saving target function button is detected in step S22.

  If it is determined in step S30 that the power saving target function is to be continued (YES), the process proceeds to step S31 and the time measurement is continued. In step S32, the time until the power is turned off, that is, one hour in this embodiment has elapsed. It is checked whether or not. In step S32, when it is not detected that 1 hour has passed (in the case of NO), the process proceeds to step 31 and the time measurement process is continued.

  In step S32, when it is detected that one hour has passed (in the case of YES), the process proceeds to step 33, and for example, an OSD display “Power OFF” is displayed.

  In step S34, the daily power consumption and the cumulative power consumption are set in the memory, and the power is turned off in step S35. The power-off process in step S35 may be a process of turning off the power supply even when the power supply is in a standby state.

(Third embodiment)
Next, the operation of the present embodiment will be described with reference to the flowchart of FIG. In the embodiment shown in FIG. 6, power saving is performed by lowering the brightness of the backlight when a predetermined power consumption is reached and turning off the power when the target power consumption is reached. When the power saving function is not continued in step S10, the power saving function is not actually performed, but the power consumption amount is continuously accumulated and the power saving target function is restored again. The power saving effect is improved. The control configuration of the television receiver in this embodiment can be the same as that shown in FIG. 1 as in the first embodiment.

  In each step in FIG. 6, steps indicated by the same reference numerals as those shown in FIG. 2 indicate those performing the same processing. Accordingly, the changes will be described, and the other description is the same as the processing in FIG.

  In step S10 of FIG. 6, when the power saving function is not continued (in the case of NO), the process proceeds to step S41. In step S41, the power saving target function setting flag is lowered, and processing is performed so as to continue timing.

  Next, the process returns to step S1 and continues. When the process returns to step S1, the power saving target function setting flag is lowered. Therefore, in step S1, it is determined that there is no power saving target function setting (NO), and the process proceeds to step S2. Unless it is detected in step S2 that the power saving target function button has been pressed, the process returns to step S1 again, and steps S1 and S2 are circulated. Therefore, it is possible to watch a program that the user wants to watch in a state where the backlight luminance cannot be lowered. However, at this time, the power consumption is continuously accumulated.

  The user can press the power saving target function button at any timing. If the power saving target function button is pressed, this is detected in step S2, a power saving target function setting flag is set in step S3, and in step S1. It is determined that the power saving target function is present, and the process proceeds to step S4. In the present case via step S41, the items as the power saving target function (power saving target period, power saving target value, ratio to the power saving target value for starting warning, etc.) have already been set, so in step S4 the power saving target It is determined that the item is set, and the process proceeds to step S5.

  Thus, according to the present embodiment, when the power saving target function button is pressed, the power saving target function can be restored at any time. Further, even when the power saving target function is not continued, the power consumption is continuously accumulated. When the power saving target function setting is restored, the process proceeds from step S1 to S4 and S5, and then the time measurement in steps S6 and S12 is continued. Be started. Therefore, the power saving effect is improved.

(Fourth embodiment)
Next, the operation of the present embodiment will be described with reference to the flowchart of FIG. In the embodiment shown in FIG. 7, when the time until reaching the power saving target value reaches a predetermined value, the warning message until the power is turned off is displayed in OSD, and the power is turned off after the predetermined time has elapsed. When the power saving function is not continued in step S30, the power saving process is not actually performed, but the power consumption is continuously accumulated, and the power saving target function is restored again. The power saving effect is improved. The control configuration of the television receiver in this embodiment can be the same as that shown in FIG. 1 as in the first embodiment.

  In each step in FIG. 7, steps denoted by the same reference numerals as those shown in FIG. 5 indicate those performing the same processing. Therefore, the changes will be described, and the other description is the same as the processing in FIG.

  In step S30 of FIG. 7, when the power saving function is not continued (in the case of NO), the process proceeds to step S42. In step S42, the power saving target function setting flag is lowered, and processing is performed so as to continue timing.

  Next, the process returns to step S21 and continues. When the process returns to step S21, the power saving target function setting flag is lowered. Therefore, in step S21, it is determined that there is no power saving target function setting (NO), and the process proceeds to step S22. Unless it is detected in step S22 that the power saving target function button has been pressed, the process returns to step S21 again, and steps S21 and S22 are circulated. Therefore, it is possible to watch a program that the user wants to watch without turning off the power even after a predetermined time has elapsed. At this time, however, the timing for integrating the power consumption is continued.

  The user can press the power saving target function button at any timing. If the power saving target function button is pressed, this is detected in step S22, a power saving target function setting flag is set in step S23, and in step S21. It is determined that the power saving target function is present, and the process proceeds to step S24. In the present case through the step S42, since the items (power saving target period, power saving target value, warning start time, etc.) as the power saving target function have already been set, it is determined in step S24 that the power saving target item has been set. Then, the process proceeds to step S25.

  Thus, according to the present embodiment, when the power saving target function button is pressed, the power saving target function can be restored at any time. Further, even when the power saving target function is not continued, the integration of the power consumption continues, and when the power saving target function setting is restored, the process proceeds from step S21 to S24 and S25, and subsequently the time measurement in steps S26 and S32 is performed. Be started. Therefore, the power saving effect is improved.

  In the first to fourth embodiments, the power consumption is set or displayed in OSD at steps S5, S7, S15, S25, S27, and S34. It may be set or displayed. In this case, the power charge is obtained from the starting point of the power saving target period, and when the obtained power charge reaches a predetermined ratio with respect to the power saving target value, the brightness of the backlight of the liquid crystal panel is reduced, or the power saving target What is necessary is just to obtain | require an electric power charge from the starting point of a period, and to turn off a power supply when the calculated | required electric power charge reaches a power-saving target value. In this way, it is possible to expect more energy saving awareness.

  Similarly, instead of setting the power consumption amount or the OSD display in steps S5, S7, S15, S25, S27, and S34, the carbon dioxide emission amount setting or the OSD display can be used. In this way, it is possible to expect an improvement in awareness of global warming prevention. Each OSD display of such power consumption, power charge, and carbon dioxide emission may be switched by switching means.

  Further, in the power-off processing in steps S17 and S35, only the video signal processing-related power including the backlight power can be turned off (video mute), and the audio signal can be kept in the ON state. Since the power consumption related to the audio signal processing is remarkably smaller than that related to the video processing, it is effective in saving power and has the effect that the contents of the program can be known to some extent only by the audio.

  In addition, the television receiver 1 is provided with a program information processing unit 18, which acquires program genre information from EPG information and outputs it to the control circuit 2. Although the control circuit 2 has a conventional technique of setting the backlight luminance suitable for the genre based on the program genre information from the program information processing unit 18, the present invention can be further applied to this technique. In this case, the overall backlight luminance ratio may be obtained by multiplying the ratio of lowering the backlight luminance according to the present invention by the backlight luminance ratio according to the genre of the prior art.

  Further, the warning display in steps S9 and S29 may be performed by voice instead of OSD display.

  Although the present invention has been described above with reference to specific embodiments, the present invention is not limited to the above-described embodiments, and can be modified and implemented without departing from the scope of the present invention.

  The present invention can be used for a television receiver, a game machine, and the like provided with a liquid crystal display device.

The control block diagram of the television receiver with which this invention is applied is shown. It is a flowchart which shows the control action in 1st Embodiment of this invention. It is the characteristic view which showed the relationship between backlight brightness | luminance and power consumption. It is the figure which showed the relationship between the power consumption and backlight brightness | luminance in the 1st Embodiment of this invention. It is a flowchart which shows the control action in 2nd Embodiment of this invention. It is a flowchart which shows the control action in the 3rd Embodiment of this invention. It is a flowchart which shows the control action in 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Television receiver 2 ... Control part 3 ... Antenna 4 ... Tuner 5 ... External signal input part 6 ... Input switching part 7 ... Decoder 8 ... Video signal Processing unit 9 ... LCD controller 10 ... OSD circuit 11 ... Liquid crystal panel (liquid crystal display device)
DESCRIPTION OF SYMBOLS 12 ... Backlight control part 13 ... Backlight 14 ... Operation part 15 ... Clock / time measuring part 16 ... Memory 17 ... Power supply circuit 18 ... Program information processing part

Claims (11)

In a television receiver equipped with a liquid crystal panel,
A power saving target function setting means for setting a power saving target period and a power saving target value;
A power consumption calculating means for obtaining a power consumption from a starting point of the power saving target period;
Backlight brightness reduction means is provided for reducing the brightness of the backlight of the liquid crystal panel when the power consumption calculated by the power consumption calculation means reaches a predetermined ratio with respect to the power saving target value. A television receiver. The power saving target function setting means includes means for setting a ratio to a power saving target value for starting a warning,
Warning display means for displaying a warning that the backlight brightness is set to the energy saving mode when the power consumption calculated by the power consumption calculation means reaches a ratio to the power saving target value for starting the warning. The television receiver according to claim 1.   After the backlight brightness is reduced by the backlight brightness reducing means, the power is turned on when the power consumption from the starting point of the power saving target period determined by the power consumption calculating means reaches the power saving target value. The television receiver according to any one of claims 1 and 2, further comprising power-off means for turning off. In a television receiver equipped with a liquid crystal panel,
A power saving target function setting means for setting a power saving target period and a power saving target value;
A power rate calculation means for obtaining a power rate from the starting point of the power saving target period;
The apparatus further comprises backlight luminance reducing means for reducing the luminance of the backlight of the liquid crystal panel when the electric power charge obtained by the electric power charge calculating means reaches a predetermined ratio with respect to the power saving target value. Television receiver. In a television receiver equipped with a liquid crystal panel,
A power saving target function setting means for setting a power saving target period and a power saving target value;
A power consumption calculating means for obtaining a power consumption from a starting point of the power saving target period;
When the power consumption calculated by the power consumption calculation means reaches a predetermined time until the power saving target value is reached, a power-off warning is started, and the predetermined time has elapsed after the warning is started. A television receiver comprising power-off means for turning off the power. The power saving target function setting means includes:
A warning start time setting means for setting a warning start time until the power consumption reaches a power saving target value is provided.
6. The apparatus according to claim 5, further comprising warning display means for displaying a warning to turn off the power after a predetermined time when the power consumption calculated by the power consumption calculation means reaches the warning start time. The described television receiver. In a television receiver equipped with a liquid crystal panel,
A power saving target function setting means for setting a power saving target period and a power saving target value;
A power rate calculation means for obtaining a power rate from the starting point of the power saving target period;
A television receiver comprising power-off means for turning off the power when the power charge calculated by the power charge calculating means reaches the power-saving target value. In a power saving method of a television receiver equipped with a liquid crystal panel,
Set power saving target period and power saving target value,
Obtain the power consumption from the starting point of the power saving target period,
A power saving method, wherein the brightness of the backlight of the liquid crystal panel is reduced when the obtained power consumption reaches a predetermined ratio with respect to the power saving target value. In a power saving method of a television receiver equipped with a liquid crystal panel,
Set power saving target period and power saving target value,
Obtain the power consumption from the starting point of the power saving target period,
A power saving method comprising: turning off a power supply when the obtained power consumption reaches the power saving target value. In a power saving method of a television receiver equipped with a liquid crystal panel,
Set power saving target period and power saving target value,
Obtain the electricity rate from the starting point of the power saving target period,
A power saving method, wherein the luminance of the backlight of the liquid crystal panel is reduced when the obtained power rate reaches a predetermined ratio with respect to the power saving target value. In a power saving method of a television receiver equipped with a liquid crystal panel,
Set power saving target period and power saving target value,
Obtain the electricity rate from the starting point of the power saving target period,
A power saving method, wherein the power is turned off when the calculated power charge reaches the power saving target value.

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