JP2012235188A - Image display unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display unit capable of suppressing the change of power consumption and allowing a charging device connected to the unit to correctly determine whether the unit is used or not.SOLUTION: An image display unit to be connectable as an object unit to a charging device which performs charging on the basis of the power consumption of the object unit includes: an image display device 1; a speaker 2; luminance and volume control means 3 for controlling the display luminance of the image display device 1 and the reproduction volume of the speaker; reference value setting means 4 for acquiring the threshold of the power consumption for the determination of presence/absence of charging from the charging device, and setting a value where a predetermined value is added to the threshold as a reference value; comparison means 6 for calculating the power consumption of the unit on the basis of the display luminance and reproduction volume, and comparing it with the reference value; and power consumption means 7 for consuming power equal to or larger than a difference when the power consumption is less than the reference value in the comparison means.

Description

  The present invention relates to a video display device, and more particularly to a video display device that can be connected to a billing device that charges according to a power consumption value.

  Conventionally, a video display device such as a television is connected to a billing device at a hotel, a hospital, or the like, and there is a usage form in which billing is performed according to use as a pay device.

  In many cases, the billing device charges the power supply line current of the pay device by detecting the use of the pay device based on the magnitude of the detected voltage by detecting the power line current of the charge device.

  In the case of such a billing apparatus, the presence or absence of use may be erroneously determined due to the influence of the waveform of the power supply line current, and it is difficult to set a threshold value.

  Therefore, a method is disclosed in which the threshold value is set correctly and in detail by sampling the power line current of the pay device on the billing device side and digitizing the detected value (see, for example, Patent Documents 1 and 2).

JP 2005-56331 A JP 2005-70901 A

  However, these prior arts are only related to the accuracy improvement on the billing device side, and it cannot be said that it is possible to cope with the case where the power line current of the pay device increases or decreases and the power consumption fluctuates.

  In the case of a video display device such as a television, most of the power is consumed by the video display device and the speaker. In a liquid crystal television, the power consumption varies greatly by changing the backlight brightness of the liquid crystal panel and the speaker volume. Of course, power consumption increases when the backlight brightness and speaker volume are set large, and power consumption decreases when it is set low.

  In addition, in a video display device having a digital broadcast receiving function, most of the internal circuits remain in an energized state even when the power is turned off with a remote controller in order to cope with the operation of digital broadcasting.

  Therefore, there is only a difference between whether the backlight is turned on or completely turned off in the usage state where the backlight brightness and speaker volume are set very low and in the non-use state where the power is turned off with the remote control. There is no big difference. For this reason, there is a possibility that the billing device may make a misjudgment that it is not charged when the backlight is dimmed and used at a low volume, or is charged when the power is turned off with the remote control. .

  The above problem can be solved by clearly distinguishing the power consumption between the use state and the non-use state, but for this purpose, it is necessary to suppress fluctuations so that the power consumption does not decrease in the use state. One way is to fix the brightness and speaker volume of the video display device at a high level. However, the user cannot adjust the display brightness and playback volume arbitrarily, so the usability is very poor. .

  The present invention has been made in view of the above-described problem, and by suppressing fluctuations in power consumption, a video display device that can be charged by a billing device connected thereto correctly determining whether or not the device is used. The purpose is to provide.

  A video display device according to the present invention is a billing device that charges based on power consumption of a target device and a video display device that can be connected as the target device, the video display device, a speaker, and the display brightness of the video display device And a luminance / volume control means for controlling the playback volume of the speaker, and a threshold value setting for acquiring a threshold value of power consumption for determining whether or not to charge from a charging device, and setting a value obtained by adding a predetermined value to the threshold value as a reference value Power, a comparison means for calculating the power consumption of the apparatus based on the display brightness and the reproduction volume, and comparing the power consumption with the reference value, and a power greater than the difference when the power consumption calculated in the comparison means is lower than the reference value. Power consumption means for consuming power.

  The video display device of the present invention acquires a threshold value of power consumption for determining whether or not to charge from the charging device, a reference value setting means for setting a value obtained by adding a predetermined value to the threshold value as a reference value, display luminance and reproduction Comparing means for calculating the power consumption of the device based on the volume and comparing it with the reference value, and a power consuming means for consuming more than the difference when the power consumption calculated by the comparing means is below the reference value; Therefore, it is possible to always consume more power than the reference value at the time of use, and the charging device can correctly determine whether the device is used or not to charge.

It is a block diagram which shows the structure of the video display apparatus of this invention. It is a flowchart which shows operation | movement of the video display apparatus of this invention.

(Embodiment 1)
<Configuration>
FIG. 1 is a block diagram showing the configuration of the video display apparatus according to the present embodiment. The video display apparatus according to the present embodiment is connected to a charging apparatus, and is charged according to a power consumption threshold set by the charging apparatus.

  This video display device includes a video display device 1 such as a liquid crystal display panel, a speaker 2, and luminance / volume control means 3 for controlling the display luminance of the video display device 1 and the reproduction volume of the speaker 2. The brightness / volume control means 3 adjusts the display brightness and playback volume according to the user's operation, and automatically displays brightness and playback volume according to the surrounding environment such as the brightness of the installation location of the device and the noise situation, and the program contents. May be adjusted.

  Further, the video display device includes a reference value setting unit 4 that sets a reference value of power consumption of the device, and a storage unit 5 such as a nonvolatile memory that stores the reference value. The reference value set here is a value that is larger than the threshold value set by the charging device, and is a power consumption value that the charging device can definitely determine that the video display device is in use.

  The video display device calculates the power consumption of the device from the display luminance and the reproduction volume, and compares the power consumption with the reference value. When the power consumption calculated by the comparison unit 6 is lower than the reference value, the difference power Power consuming means 7 for consuming power, and power control means 8 capable of variably controlling the power consumption of the power consuming means 7. The power consuming means 7 is composed of a plurality of dummy resistors, and the amount of power consumed by the power consuming means 7 can be adjusted by switching the number of dummy resistors energized by the power control means 8.

  The brightness / volume control means 3, the reference value setting means 4, the comparison means 6, and the power control means 8 are, for example, a microcontroller provided with a user interface, and one microcontroller often serves as the same.

<Operation>
FIG. 2 is a flowchart showing the operation of the video display apparatus according to the present embodiment. Hereinafter, the operation of the video display apparatus will be described with reference to FIG.

  For example, when the user performs an operation of changing the display brightness and the playback volume through a remote controller or the like, the brightness / volume control means 3 changes the display brightness and the playback volume according to the operation input (step S1).

  The comparison means 6 calculates a power consumption value from the changed display luminance and reproduction volume (step S2). The comparison means 6 holds table data of combinations of display luminance and reproduction volume setting values and corresponding power consumption values, and obtains power consumption values with reference to these table data. Alternatively, the power consumption characteristics of the video display device 1 and the speaker 2 may be formulated into formulas, and the power consumption values may be calculated by applying display luminance and reproduction volume setting values to the formulas.

  The comparison unit 6 compares the power consumption value calculated in step S2 with the power consumption reference value set in advance by the reference value setting unit 4 (step S3). Once this reference value is set, it is stored in the storage means 5, so that after the setting, the reference value can be referred to in the storage means 5. When the power consumption value is smaller than the reference value (Yes in step S3), the power control unit 8 calculates the difference between the power consumption value and the reference value, and calculates the number of dummy resistors that consume power enough to make up the difference. (Step S4). Then, energization is performed for the number of dummy resistors (step S5).

  If the power consumption value is greater than the reference value (No in step S3), no processing is performed until the brightness and volume are changed again.

  By performing such control, the power consumption of the entire apparatus at the time of use always keeps the reference value or more, so that the charging apparatus can definitely determine the usage state of the video display apparatus and perform charging.

  Although the power consuming means 7 has been described as a circuit having a plurality of dummy resistors, other configurations such as a circuit using a variable resistor may be used as long as the power consumption is variable under the control of the power control means 8. good.

  In addition to controlling the number of dummy resistors energized in the power consuming unit 7, the power control unit 8 can completely cut off the energization to the power consuming unit 7. That is, the power consuming means 7 is configured to be able to turn on / off its operation. When the charging device is not connected to the video display device, the power consumption means 7 is cut off so that no extra power is consumed.

  Further, the power consuming means 7 may be configured to be detachable from the video display device. When the charging device is not connected to the video display device, it is not necessary to prepare the power consuming means 7 itself, which can lead to cost reduction of the video display device.

  Moreover, although the liquid crystal display panel was mentioned as a typical example of the video display device 1, all video display devices, such as a plasma panel and an organic EL panel, whose power consumption greatly fluctuates according to display luminance can be adopted.

<Effect>
The video display device of the present invention is a video display device that can be connected to a billing device that charges based on the power consumption of the target device, and the video display device 1, the speaker 2, and the display brightness of the video display device 1. A luminance / volume control means 3 for controlling the reproduction volume of the speaker 2 and a threshold value of power consumption for determining the presence / absence of charging from the charging device, and a reference value setting for setting a value obtained by adding a predetermined value to the threshold as a reference value The power consumption of the apparatus is calculated based on the means 4, the display brightness and the reproduction volume, and the comparison means 6 compares the power consumption with the reference value. Since the power consumption means 7 for consuming is provided, the power consumption of the entire apparatus at the time of use always keeps the reference value or more. Accordingly, the billing apparatus can definitely determine the usage state of the video display device and perform billing.

  The video display apparatus of the present invention further includes power control means 8 that variably controls the power consumption of the power consumption means 7 according to the difference, so that the power consumption of the entire apparatus during use is always greater than or equal to a reference value. It can be kept near the reference value. As a result, the billing apparatus can definitely determine the usage state of the video display device, perform billing, and suppress the generation of wasteful power consumption as much as possible.

  In the video display device of the present invention, the comparison unit 6 calculates power consumption based on the display luminance and the reproduction volume when at least one of the display luminance and the reproduction volume is changed in the luminance / volume control unit 3. Therefore, even if the display brightness and the playback volume are changed, it is possible to always keep the power consumption of the entire apparatus at or above the reference value. Accordingly, the billing apparatus can definitely determine the usage state of the video display device and perform billing.

  Further, in the video display device of the present invention, the power consuming means 7 is configured to be able to turn on / off its operation. Therefore, when the charging device is not connected to the video display device, the power consuming means 7 is de-energized. By doing so, power consumption can be suppressed.

  Further, in the video display device of the present invention, the power consuming means 7 is detachably provided on the main body of the video display device, so that the power consuming means 7 itself is prepared when the charging device is not connected to the video display device. Since it is not necessary, the cost of the video display device can be reduced.

  1 video display device, 2 speaker, 3 brightness / volume control means, 4 reference value setting means, 5 storage means, 6 comparison means, 7 power consumption means, 8 power control means.

Claims (5)

A billing device that charges based on the power consumption of the target device and a video display device connectable as the target device,
A video display device;
Speakers,
Brightness / volume control means for controlling the display brightness of the video display device and the playback volume of the speaker;
A reference value setting means for acquiring a power consumption threshold value for determining whether or not to charge from the charging device, and setting a value obtained by adding a predetermined value to the threshold value as a reference value;
Comparing means for calculating the power consumption of the device based on the display brightness and the playback volume, and comparing it with the reference value;
A power consuming means for consuming power greater than or equal to the difference when the power consumption is lower than the reference value in the comparing means;
Video display device.   The video display apparatus according to claim 1, further comprising a power control unit that variably controls a power consumption amount of the power consumption unit according to the difference.   The video display device according to claim 1, wherein the comparison unit calculates the power consumption when at least one of the display luminance and the reproduction volume is changed in the luminance / volume control unit.   The video display device according to claim 1, wherein the power consuming unit is configured to be capable of turning on / off its operation.   The video display device according to claim 1, wherein the power consuming unit is detachably provided on a main body of the video display device.

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