JP7409356B2 - Power estimation device, power consumption control device, audio device, power estimation method, and program - Google Patents

Description

The present invention relates to a power estimation device, a power consumption control device, an audio device, a power estimation method, and a program.

An RGB LED (Red, Green, Blue Light Emitting Diode: RGB light emitting diode) with a built-in microcomputer controls the brightness of each of the R, G, and B LEDs using 8 bits each, a total of 24 bits, which is given from the outside as serial data. Brightness control can be performed in 256 steps for each of R, G, and B using LED control signals, and full color (approximately 16 million colors) color expression can be achieved. Furthermore, a large number (for example, 60) of such RGB LEDs can be controlled simultaneously, and by combining it with an audio device, for example, it becomes possible to realize an illumination device that can express a variety of light.

Here, the drive current required for one set of RGB LEDs is, for example, 20 mA (milliampere) for each R, G, and B LED when lit at maximum brightness, and for one set of RGB LEDs, 20 mA x 3 = It becomes 60mA. For example, when all 60 RGB LEDs connected in series are lit at maximum brightness, a drive current of 60 mA x 60 = 3.6 A (ampere) flows. Therefore, if such an RGB LED illumination device is used at the same time as audio equipment or video equipment at an event venue or a concert venue, for example, a large current will flow momentarily, causing each equipment to malfunction. there is a possibility.

Therefore, a technology is needed to estimate the power consumption of the RGB LED by measuring the current flowing through the RGB LED, and to adjust the brightness of the RGB LED, the volume of the audio device, etc. based on the estimation results. .

The conventional technology for measuring the current flowing through a device is to insert an ultra-low resistance of several tens of mΩ (milliohm) in series to the device's drive circuit, read the voltage across it with the A/D port of the microcontroller, and then read the voltage across it using the A/D port of the microcontroller. A common technique is to measure the current flowing through the drive circuit based on the value of the resistance and the resistance value.

In this case, the accuracy of the amount of current that can be read increases as the value of the resistor increases, but when measuring a large current of several amperes, the power consumed by the resistor increases considerably, and devices such as LEDs The voltage drop is also large and power loss increases. Therefore, in the past, there was a problem in that measurements had to be made while finding a compromise between current measurement accuracy and power loss by suppressing the value of the resistance to an appropriate value.

Therefore, an object of the present invention is to make it possible to estimate power consumption without consuming extra power and without affecting the driving of the device.

A power estimating device according to an example of an aspect is a means for generating a smoothed voltage signal of a control data signal supplied to the device by a control device that controls the device , the power estimating device generating a smoothed voltage signal of a control data signal supplied to the device by a control device that controls the device, generating an intermediate potential signal that is a stabilized signal with smoothed voltage signal generating means for outputting the bias voltage in the bias voltage signal as a smoothed voltage signal of the control data signal ; , power consumption estimating means for estimating the magnitude of power consumption of the device.

According to the present invention, it is possible to estimate power consumption without consuming extra power and without affecting the driving of the device.

FIG. 1 is a system block diagram of an embodiment. FIG. 2 is an explanatory diagram (Part 1) of a data format of an LED control signal. FIG. 3 is an explanatory diagram (part 2) of the data format of the LED control signal. FIG. 3 is a circuit configuration diagram of a smoothing circuit. 5 is a diagram showing an example of voltage time change characteristics of a voltage signal output from a terminal VF1. FIG. 7 is a diagram showing an example of voltage time change characteristics of a voltage signal output from a terminal VF2. FIG. 12 is a flowchart showing an example of brightness/volume adjustment processing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a system block diagram of a system according to this embodiment (hereinafter referred to as "this system"). This system includes a Main CPU 101, a SubCPU 102, #1 to #N RGB-LEDs with built-in microcontrollers (hereinafter referred to as "RGB-LEDs") 103 connected in series, and a 5V (volt) power supply 104 exclusively for the LEDs. The main components include a buffer 108, a smoothing circuit 109 functioning as a smoothed voltage signal generating means for smoothing a control data signal, an acoustic amplifier 112, and a speaker 114. This system as a whole functions as a power consumption control device that controls the power consumption of at least one of the device or another device that operates in conjunction with the device.

The Main CPU (Central Processing Unit) 101 is a processor that controls the overall light emission control of the RGB-LEDs 103 #1 to #N and the sound volume control of the audio amplifier 112 and the speaker 114.

The SubCPU 102 calculates a brightness correction value while irregularly receiving the brightness control signal 105 from the Main CPU 101, and sends the LED control signal 106 corrected based on the brightness correction value to the RGB-LEDs 103 of #1 to #N. output at the timing described later.

#1 to #N RGB-LEDs 103 each include three LEDs that emit light in three colors corresponding to the three primary colors of R (red), G (green), and B (blue). The light emission of these LEDs is controlled by a built-in microcomputer (hereinafter referred to as "microcomputer"), which is not particularly shown, which receives an 8-bit x 3 LED control signal 106 for its own device from the SubCPU 102, and uses a bit string of 8 bits each. The three specified brightness values are extracted and the three LEDs are made to emit light at each brightness value.

The #1 to #N RGB-LEDs 103 are connected in series by a serial control line 107 connected to the SubCPU 102.
That is, the serial control line 107 output from the SubCPU 102 connects the DI input terminal of the #1 RGB-LED 103, its DO output terminal to the DI input terminal of the #2 RGB-LED 103, and its DO output terminal to the #2 RGB- The DI input terminals of the LEDs 103 are connected in series, and are connected from the DO output terminal of the #N-1 RGB-LED 103 to the DI input terminal of the #N RGB-LED 103.
Finally, the serial control line 107 is connected in loopback from the DO output terminal of the #N RGB-LED 103 to the SubCPU 102.

A power supply voltage of, for example, 5V is applied to the RGB-LED 103 from an LED-dedicated power supply 104 via a VCC terminal.

2 and 3 are explanatory diagrams of the data format of the LED control signal 106 supplied from the SubCPU 102 to the #1 to #N RGB-LEDs 103 via the serial control line 107. First, FIG. 2A shows an example of the data format of a bit string for one RGB-LED 103 that is output as the LED control signal 106. The transmission direction of the bit string is the direction shown as an arrow 201, which goes from left to right toward the page of FIG. 2(a) over time.

For one RGB-LED 103, first, the brightness value for an LED that emits G (green) color light is transmitted as an 8-bit bit string. This 8-bit bit string allows specifying 256 brightness values from 0 to 255 (in decimal notation) for the green LED.

Next, for one RGB-LED 103, the brightness value for an LED that emits R (red) color is transmitted as an 8-bit bit string in the same manner as described above. This 8-bit bit string allows specifying 256 brightness values from 0 to 255 (in decimal notation) for the red light emitting LED.

Furthermore, for one RGB-LED 103, the brightness value for an LED that emits B (blue) color light is transmitted as an 8-bit bit string in the same manner as described above. This 8-bit bit string allows specifying 256 brightness values from 0 to 255 (in decimal notation) for the blue light emitting LED.

With the three bit strings shown in FIG. 2A, a bit string of 8 bits×3=24 bits is specified for one RGB-LED 103.

FIG. 2(b) is a diagram showing a voltage pulse signal of an H signal in which each bit of the bit string corresponds to a logical value of 1. In this embodiment, the high level voltage and the low level voltage do not directly correspond to the logical values 1 and 0, but the logical value 1 and the logical value 0 are determined by the difference in the duty ratio of the time length of the high level voltage and the low level voltage. distinguish. As shown in FIG. 2(b), the time length of the H signal value (logical value 1) for one bit is, for example, 1.25 μs (microseconds). This 1-bit H signal value is composed of, for example, a high level voltage period having a time length of 850 ns (nanoseconds) and a low level voltage period having a time length of 400 ns.

FIG. 2(c) is a diagram showing a voltage pulse signal of an L signal in which each bit of the bit string corresponds to a logical value of 0. The time length of the L signal value (logical value 0) for 1 bit is the same as the time length of the H signal value in FIG. 2(b), for example, 1.25 μs. This 1-bit L signal value is composed of, for example, a high level voltage period having a time length of 400 ns and a low level voltage period having a time length of 850 ns.

As can be understood from FIGS. 2(b) and (c), in each bit of the three bit strings in which three brightness values are specified as shown in FIG. 2(a), that bit has an H signal value (logical When the value 1) is set, the duty ratio between the high level voltage time and the low level voltage time is 850:400=17:8. On the other hand, when the L signal value (logical value 0) is set to that bit, the duty ratio between the high level voltage time and the low level voltage time is 400:850=8:17.

Therefore, in the LED control signal 106, the high level voltage period is more than twice as long as the low level voltage period in terms of the H signal value. becomes higher than the intermediate potential value (the intermediate voltage value between the high level voltage value and the low level voltage value).
On the other hand, in the case of L signal values, contrary to the case of H signal values, the low level voltage period is more than twice as long as the high level voltage period. The average voltage value of is lower than the intermediate potential value.
In this embodiment, as will be described later, based on this fact, the average voltage value of the LED control signal 106 is measured, and based on the measured average voltage value, the overall consumption of RGB-LEDs 103 #1 to #N is determined. This is for estimating power.

FIG. 2(d) will be described later.

FIG. 3 shows, as an example, the LED control signal 106 for three sets of RGB-LEDs 103 #1 to #3 transmitted on the serial control line 107 when the number N of RGB-LEDs 103 in FIG. 1 is 3. FIG. 2 is a diagram illustrating a data format. The SubCPU 102 sends out LED control signals 106 to three sets of RGB-LEDs 103 #1 to #3 with a reset code in between for each data update cycle 1, 2, . . . .
That is, for example, in data update cycle 1, first, when the LED control signal 106 is input from the SubCPU 102 to the DI input terminal of the #1 RGB-LED 103 (abbreviated as "LED(#1)" in the figure), the signal shown in FIG. ), first, a bit string of 24 bits (see FIG. 2(a)) for #1 RGB-LED 103 is input, and then a bit string for #2 RGB-LED 103 ("LED ( A 24-bit bit string for #3 RGB-LED 103 (abbreviated as “LED(#3)” in the figure) is input. input.

At the stage of FIG. 3(a), the microcomputer in the #1 RGB-LED 103 takes in the bit string "24 bits for LED (#1)" transmitted on the serial control line 107 and is intended for its own device. The bit string is deleted and the other bit strings are output from the DO output terminal.

As a result, for example, in data update cycle 1, when the LED control signal 106 is input from the DO output terminal of the #1 RGB-LED 103 to the DI input terminal of the #2 RGB-LED 103, the signal shown in FIG. 3(b) is generated. The 24-bit bit string for #1 RGB-LED 103 is removed, the 24-bit bit string for #2 RGB-LED 103 is input, and then the 24-bit bit string for #3 RGB-LED 103 is input. A bit string of 24 bits is input.

At the stage of FIG. 3(b), the microcomputer in the #2 RGB-LED 103 takes in the bit string "24 bits for LED (#2)" transmitted on the serial control line 107 and is intended for its own device. The bit string is deleted and the other bit strings are output from the DO output terminal.

As a result, for example, in data update cycle 1, when the LED control signal 106 is input from the DO output terminal of the #2 RGB-LED 103 to the DI input terminal of the #3 RGB-LED 103, the signal shown in FIG. 3(c) is generated. Thus, the 24-bit bit string for #2 RGB-LED 103 is removed, and only the 24-bit bit string for #3 RGB-LED 103 is input.

At the stage of FIG. 3(c), the microcomputer in the #3 RGB-LED 103 takes in the bit string "24 bits for LED (#3)" transmitted on the serial control line 107 for its own device, and then The bit string is deleted and the other bit strings are output from the DO output terminal.

As a result, for example, in data update cycle 1, when looping back to the SubCPU 102 from the DO output terminal of the #3 RGB-LED 103, no data is input as shown in FIG. 3(d). . The SubCPU 102 determines that the LED control signal 106 has been normally received by each RGB-LED 103 by confirming that nothing is received by looping back the serial control line 107.

After the SubCPU 102 sends the 24-bit bit string for the last N=3 RGB-LEDs 103 to the serial control line 107 as the LED control signal 106, as shown in FIGS. 3(a) and 2(d), A reset code consisting of a low-level voltage period having a time length of 50 μs or more is sent to the serial control line 107 as the LED control signal 106.

The microcomputer in #1 RGB-LED 103 detects that the state of the LED control signal 106 on the serial control line 107 input from the DI input terminal is a low level voltage for more than 50 μs at the timing shown in FIG. 3(a). When this is recognized, the three LEDs R, G, and B start emitting light at the three brightness values specified by the received 24-bit bit string.

The microcomputer in #2 RGB-LED 103 also shows that the status of the LED control signal 106 on the serial control line 107 inputted from the DI input terminal is shown in FIG. 3(b) at almost the same time as in the case of FIG. 3(a). By recognizing that the voltage has been at a low level for a time length of 50 μs or more, the three LEDs R, G, and B start emitting light at the three brightness values specified by the received 24-bit bit string.

The microcomputer in #3 RGB-LED 103 also changes the state of the LED control signal 106 on the serial control line 107 input from the DI input terminal to the case of FIGS. 3(a) and 3(b) shown in FIG. 3(c). By recognizing that the voltage has been low level for more than 50 μs at approximately the same time, the three LEDs R, G, and B will emit light at the three brightness values specified by the received 24-bit bit string. Start.

As described above, in each of the RGB-LEDs 103 #1 to #3, the light emission of each LED is refreshed based on each brightness value newly updated in data update cycle 1.

After the sending of the reset code is completed, in the next data update cycle 2, the RGB-LEDs 103 of #1 to #3 are updated based on the latest brightness control signal 105 that is irregularly supplied from the Main CPU 101 to the Sub CPU 102 in FIG. A new brightness value for each LED is set in the LED control signal 106 and sent out on the serial control line 107 as in data update cycle 1.

As described above, in the RGB-LEDs 103 #1 to #N in FIG. 1, each LED is controlled to emit light in full color based on each brightness value updated in each data update cycle described in FIG. As a result, colorful illumination displays and the like can be realized.

Returning to the explanation of FIG. 1, the smoothing circuit 109 is an example of a smoothing circuit that functions as a smoothed voltage signal generating means. The smoothed voltage signal generation means smoothes the LED control signal 106 (control data signal) output by the SubCPU 102 (control device) that drives the RGB-LED 103 (device), and generates a smoothed voltage signal.

As described above in the explanation of FIGS. 2(b) and 2(c), in this embodiment, when an H signal (logical value 1) is specified as each bit of each bit string specified as the LED control signal 106, Utilizing the fact that the voltage value of the LED control signal 106 changes depending on when the L signal (logical value 0) is specified, the power consumption is calculated based on the smoothed voltage signal obtained by smoothing the LED control signal 106. Estimate size.

FIG. 4 is a circuit diagram of the smoothing circuit 109 in FIG. 1. Terminal A is connected to the output of buffer 108 in FIG. Substantially, the voltage value of the LED control signal 106 on the serial control line 107 is input to this terminal A. The buffer 108 is inserted for the purpose of separating the signals so that the smoothing circuit 109 does not affect the LED control signal 106 supplied to the RGB-LEDs 103. The ground line of the serial control line 107 in FIG. 1 is connected to the terminal G. As a result, the voltage value of the LED control signal 106 is smoothed by a low-pass filter circuit consisting of a resistor R1 having a resistance value of, for example, 47 KΩ (kilohms) and a capacitor C1 having a capacitance value of, for example, 220 pF (picofarads). A smoothed voltage signal is output from terminal VF1.

Here, as described above, if the output of the terminal VF1 in a simple RC filter circuit consisting of the resistor R1 and the capacitor C1 is made into a smoothed voltage signal, the following problem occurs.
Problem 1: If you use a resistor/capacitor value that has a low averaging effect (low resistance value, small capacitance), the voltage of the smoothed voltage signal output from terminal VF1 will easily fluctuate, and the voltage will change quickly. The voltage can be high, but it can also be low.
Problem 2: If you use resistor/capacitor values that have a high averaging effect (high resistance value, large capacity capacitor), the voltage of the smoothed voltage signal output from terminal VF1 will be difficult to rise, and LED control Unless a considerable number of bits in the signal 106 continue to have a high level voltage value, the voltage will not rise (however, it is unlikely to become low either, so signal unevenness can be removed).
In other words, the best effect of the filter is in a situation where ``If bits of high level voltage value continue, the voltage will rise smoothly, but even if bits of low level voltage value continue, we do not want the voltage to fall quickly.'' It is.

FIG. 5 is a diagram showing an example of the voltage time change characteristics of the voltage signal output from the terminal VF1. The vertical axis shows the output voltage value [volts], and the horizontal axis shows the elapsed time [seconds]. In the LED control signal 106, voltage characteristics 501 when most bits change to high level (logical value 1) are compared with voltage characteristics 502 when most bits change to low level (logical value 0). , it can be seen that it takes a long time to reach the average voltage value corresponding to the high level.
With this, even if most of the bits in the LED control signal 106 change to high level (logical value 1) and a large current momentarily flows through the RGB-LEDs 103 #1 to #N, it takes time to detect the state. Therefore, there is a possibility that control to suppress momentary large current flowing through the RGB-LEDs 103 #1 to #N may not be in time.

Therefore, in this embodiment, in the smoothing circuit 109 shown in FIG. 4, the smoothed voltage signal at the terminal VF1 is biased at an intermediate potential. By realizing this behavior, the output waveform (output fluctuation) when the current consumption is high can be made clearer.

Specifically, in FIG. 4, the voltage across a power supply V1 of, for example, 5V, which is stabilized by a capacitor C4 having a capacitance value of, for example, 10 μF (microfarad), is connected to two resistors having the same resistance value of, for example, 2.2KΩ. The voltage is divided to an intermediate potential by R3 and R4. By connecting two capacitors C2 and C3 with the same capacitance value of 1 nF (nanofarad) to the high potential side and the ground side of this intermediate potential, the waveform of the intermediate potential does not change quickly (it does not fluctuate wildly). ).

The intermediate potential signal stabilized in this way is applied as a bias voltage signal to the smoothed voltage signal at the terminal VF1 via a resistor R2 having a resistance value of, for example, 22 KΩ and a backflow prevention diode D2. Then, the bias voltage in the bias voltage signal is output from the terminal VF2 as a speeded-up smoothed voltage signal.

Note that the terminal VF3 in FIG. 4 is a terminal that allows the Main CPU 101 to check the potential of the power supply V1 that generates the intermediate potential signal.

FIG. 6 is a diagram showing an example of the voltage time change characteristics of the voltage signal output from the terminal VF2. The vertical and horizontal axes are the same as in FIG. 5. In the LED control signal 106, the voltage characteristic 601 when most bits change to high level (logical value 1) reaches an average voltage value corresponding to a high level, compared to the voltage characteristic 501 in FIG. It turns out that the time it takes to do so is short.
Therefore, when most of the bits in the LED control signal 106 change to high level (logical value 1) and a large current momentarily flows through the RGB-LEDs 103 #1 to #N, this state can be quickly detected. , #1 to #N RGB-LEDs 103 can be quickly controlled to suppress large currents from flowing instantaneously.

Note that when biased with an intermediate potential signal, the voltage value of the voltage characteristic 601 when most bits change to high level (logical value 1) is the same as when most bits change to low level (logical value 0). The voltage value is relatively close to the voltage value of the voltage characteristic 602 of . However, even at this level, the difference can be detected with sufficiently high accuracy by the ADC (A/D converter) 110 (see FIG. 1) of the Main CPU 101. In particular, in this embodiment, when a special large current flows that causes most bits to change to high level (logical value 1), appropriate suppression control only needs to be implemented, and intermediate states are detected. Since there is little need to do so, the control method of this embodiment allows sufficiently effective current suppression control to be performed.

FIG. 7 is a flowchart illustrating an example of brightness/volume adjustment processing performed by the main CPU 101 based on the VF2 voltage signal output from the terminal VF2 of the smoothing circuit 109 in FIG. This process executes operations as a power consumption estimation means and a power consumption control device.

First, the VF2 voltage signal output from the terminal VF2 in FIG. 4 in the smoothing circuit 109 in FIG. ) is imported (step S701).

Next, it is determined whether the VF2 value is larger than a threshold value 1 that is closer to a high-level voltage value (step S702).

If the determination in step S702 is YES, "0.7" is set as the brightness coefficient (step S703), and "0.8" is set as the volume coefficient (step S704).

If the determination in step S702 is NO, it is determined whether the VF2 value is larger than threshold 2 (<threshold 1) (step S705).

If the determination in step S705 is YES, "0.8" is set as the brightness coefficient (step S706), and "1.0" is set as the volume coefficient (step S707).

If the determination in step S705 is NO, the brightness coefficient is set to "1.0" (step S708), and the volume coefficient is also set to "1.0" (step S709).

Using the brightness coefficient and volume coefficient set as described above, the Main CPU 101 first calculates, as the brightness information given as the brightness control signal 105 in FIG. 1, a value obtained by multiplying the original brightness information by the brightness coefficient. , replace it with new brightness information. Then, the brightness control signal 105 replaced in this way is supplied to the SubCPU 102.

Further, as the amplifier gain 113 set for the acoustic amplifier 112 in FIG. 1, a value obtained by multiplying the original amplifier gain 113 by a volume coefficient is replaced with a new value of the amplifier gain 113. Then, the amplifier gain 113 replaced in this way is supplied to the acoustic amplifier 112. The acoustic amplifier 112 is an example of another device that operates in conjunction with the RGB-LED 103 device.

As a result, if the VF2 value detected from the LED control signal 106 is very high, there is a possibility that the maximum current is flowing through the RGB-LEDs 103 from #1 to #N. Control is performed to reduce the value of the brightness information so as to reduce the brightness value that should be given. At the same time, in step S704, control is also implemented in the acoustic amplifier 112 to suppress the loud sound. In this way, control is performed to suppress power consumption in both the RGB-LED 103 and the acoustic amplifier 112.

Further, if the VF2 value detected from the LED control signal 106 is high to some extent but has not reached near the maximum voltage value, in step S706, the brightness value to be given to the RGB-LED 103 is lowered to a certain extent, Control is performed to reduce the value of the brightness information to some extent. However, by setting the volume coefficient to 1.0 in step S707, control is performed such that the acoustic amplification in the acoustic amplifier 112 is not suppressed. In this way, control to suppress power consumption is carried out on both the RGB-LED 103 and the acoustic amplifier 112, or only on the RGB-LED 103, depending on the situation.

If the VF2 value detected from the LED control signal 106 has not increased, the power consumption of both the RGB-LED 103 and the acoustic amplifier 112 can be reduced by setting both the brightness coefficient and the volume coefficient to 1.0 in steps S708 and S709. Not implemented.

In the embodiment described above, the smoothing circuit 109 of FIG. 1 having the configuration of FIG. 4 generated the smoothed voltage signal of the LED control signal 106. On the other hand, instead of the smoothing circuit 109, for example, the Main CPU 101 itself calculates the average voltage of the LED control signal 106 that the Sub CPU 102 supplies to the RGB-LED 103 by information processing calculation for the LED control signal 106 as a function of program processing. You may also do so.
In this case, in FIG. 1, the output signal of the buffer 108 (substantially equal to the LED control signal 106) is not input to the smoothing circuit 109, but is directly connected to the ADC 110 of the Main CPU 101. The program of the Main CPU 101 is input to the ADC 110, and the LED control signal 106 converted into a digital signal may be smoothed by information processing calculations such as a low-pass filter using a digital filter or a moving average filter. Alternatively, the arithmetic mean value of the signal values may be calculated by normal numerical calculations (included in information processing calculations).

Furthermore, in the present embodiment, the main CPU 101 compares a signal obtained by digitally converting the smoothed voltage signal (VF2 voltage signal) with a threshold value to estimate the magnitude of power consumption, but estimation using an analog circuit is also possible.
In this case, the threshold voltage is connected to the reference voltage input terminal of the comparator (comparison circuit), and the smoothed voltage signal (VF2 voltage signal) is connected to the signal input terminal. The present disclosure can be achieved by connecting the output signal of the comparator to the ADC 110 of the Main CPU 101, and processing it as high power consumption if the digital signal value converted by the ADC 110 is at H level.

Regarding the above embodiments, the following additional notes are further disclosed.
(Additional note 1)
Smoothed voltage signal generation means for generating a smoothed voltage signal of a control data signal supplied to the device by a control device that controls the device;
power consumption estimating means for estimating the magnitude of power consumption of the device based on the smoothed voltage signal;
A power estimation device comprising:
(Additional note 2)
The smoothing voltage signal generating means is a smoothing circuit that smoothes the control data signal.
The power estimation device according to supplementary note 1.
(Additional note 3)
The smoothing circuit generates a stabilized intermediate potential signal having an intermediate potential with respect to the maximum potential of the control data signal, applies the intermediate potential signal to the smoothed voltage signal as a bias voltage signal, and applies the intermediate potential signal to the smoothed voltage signal as a bias voltage signal. further comprising a circuit that outputs a bias voltage in the signal as a smoothed voltage signal of the control data signal;
The power estimating device according to supplementary note 2.
(Additional note 4)
The smoothed voltage signal generation means is a functional unit executed by a computer that generates the smoothed voltage by information processing operation on the control data signal.
The power estimation device according to supplementary note 1.
(Appendix 5)
The power consumption estimation means estimates the magnitude of power consumption of the device by comparing and determining the smoothed voltage signal with a predetermined threshold.
The power estimating device according to any one of Supplementary Notes 1 to 4.
(Appendix 6)
The device is a light emitting diode with a built-in microcomputer,
The control device specifies a brightness value, and a bit string of a predetermined number of bits specified by a voltage pulse signal in which the logic value 1 or logic value 0 of each bit has a different duty ratio between a high level voltage time and a low level voltage time. is supplied to the light emitting diode as the control data signal, so that the microcomputer causes the light emitting diode to emit light at the brightness value indicated by the bit string.
The power estimating device according to any one of Supplementary Notes 1 to 5.
(Appendix 7)
When the magnitude of the power consumption of the device estimated by the power estimating device according to any one of Supplementary Notes 1 to 6 is estimated to be large, the device operates at the device or in conjunction with the device. control so that the power consumption of at least one of the devices is reduced,
Power consumption control device.
(Appendix 8)
A control device that controls a device generates a smoothed voltage signal of a control data signal to be supplied to the device,
estimating the magnitude of power consumption of the device based on the generated smoothed voltage signal;
Power estimation method.
(Appendix 9)
A control device that controls the operation of a device generates a smoothed voltage signal of a control data signal to be supplied to the device,
estimating the magnitude of power consumption of the device based on the generated smoothed voltage signal;
A program that causes a computer to perform a process.

101 Main CPU
102 Sub CPU
103 RGB-LED with built-in microcomputer
104 LED dedicated power supply 105 Brightness control signal 106 LED control signal 107 Serial control line 108 Buffer 109 Smoothing circuit 110 ADC (A/D conversion unit)
112 Acoustic amplifier 113 Amplifier gain 114 Speaker R1, R2, R3, R4 Resistor C1, C2, C3, C4 Capacitor D2 Backflow prevention diode V1 Power supply voltage VF1, VF2 Terminal

Claims (8)

Means for generating a smoothed voltage signal of a control data signal supplied to the device by a control device controlling the device , the stabilized voltage signal having an intermediate potential with respect to a maximum potential of the control data signal. generate a potential signal, apply the intermediate potential signal as a bias voltage signal to a voltage signal obtained by smoothing the control data signal with a low-pass filter, and apply the bias voltage in the bias voltage signal applied to the voltage signal to smoothed voltage signal generation means for outputting the control data signal as a smoothed voltage signal;
power consumption estimating means for estimating the magnitude of power consumption of the device by comparing and determining the smoothed voltage signal with one or more predetermined threshold values ;
A power estimation device comprising: The smoothed voltage signal generation means applies the intermediate potential signal as a bias voltage signal to a voltage signal obtained by smoothing the control data signal with a low-pass filter through a diode.
The power estimating device according to claim 1 . The smoothed voltage signal generation means is a functional unit executed by a computer that generates the smoothed voltage signal by information processing operation on the control data signal.
The power estimating device according to claim 1 or 2 . The device is a light emitting diode with a built-in microcomputer,
The control device specifies a brightness value, and a bit string of a predetermined number of bits specified by a voltage pulse signal in which the logic value 1 or logic value 0 of each bit has a different duty ratio between a high level voltage time and a low level voltage time. is supplied to the light emitting diode as the control data signal, so that the microcomputer causes the light emitting diode to emit light at the brightness value indicated by the bit string.
The power estimating device according to any one of claims 1 to 3 . When the power consumption of the device estimated by the power estimating device according to any one of claims 1 to 4 is estimated to be large, the device operates at the device or in conjunction with the device. control the power consumption of at least one of the other devices to be reduced;
Power consumption control device. The power estimation device according to any one of claims 1 to 4 ,
sound amplifier and
speaker and
A sound device equipped with. generating an intermediate potential signal that is a stabilized signal having an intermediate potential with respect to the maximum potential of a control data signal supplied to the device by a control device that controls the device; applying as a bias voltage signal to a voltage signal obtained by smoothing the voltage signal, and generating a bias voltage in the bias voltage signal applied to the voltage signal as a smoothed voltage signal of the control data signal,
estimating the magnitude of power consumption of the device by comparing and determining the smoothed voltage signal with one or more predetermined thresholds, respectively ;
Power estimation method. generating an intermediate potential signal that is a stabilized signal having an intermediate potential with respect to the maximum potential of a control data signal supplied to the device by a control device that controls the device; applying as a bias voltage signal to a voltage signal obtained by smoothing the voltage signal, and generating a bias voltage in the bias voltage signal applied to the voltage signal as a smoothed voltage signal of the control data signal,
estimating the magnitude of power consumption of the device by comparing and determining the smoothed voltage signal with one or more predetermined thresholds, respectively ;
A program that causes a computer to perform a process.

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