JP3503203B2 - Lighting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention turns on a plurality of discharge lamps by high-frequency power supplied from an inverter unit, receives a remote control signal transmitted from the outside by infrared rays, and converts the received remote control signal into a received remote control signal. The present invention relates to a lighting device in which lighting, extinction, and dimming control of a discharge lamp are performed based on the lighting device.

[0002]

2. Description of the Related Art Conventionally, a plurality of discharge lamps, a plurality of inverter sections for individually supplying high-frequency power to each discharge lamp, a remote control signal receiving section for receiving a remote control signal by infrared rays transmitted from the outside, As an example of a lighting device including a control unit that controls a plurality of inverter units based on a remote control signal received by a remote control signal reception unit to perform lighting / extinction and dimming of each discharge lamp, as shown in FIG. There is something like this. This lighting device includes two discharge lamps 1a and 1b, and inverter circuits 2a and 2b for converting AC power supplied from an AC power supply AC into high frequency power and supplying the high frequency power to the discharge lamps 1a and 1b.
A remote control signal receiving unit that receives a remote control signal (hereinafter abbreviated as a remote control signal) transmitted by infrared rays from a remote control transmitter (not shown) and a control unit that controls the inverter circuits 2a and 2b based on the received remote control signal. The remote control reception control circuit 3 which also serves as the remote control signal is provided, and the two discharge lamps 1a and 1b are lit at high frequencies by the respective inverter circuits 2a and 2b. Further, a remote control signal transmitted from the outside by infrared rays is received, and the discharge lamps 1a and 1b are controlled to blink according to the remote control signal received by the remote control reception control circuit 3.

The lighting device as described above has various features such as brightness increase by the inverter lighting, energy saving, and low noise, and the lighting of the lighting can be easily blinked by the user by the remote control transmitter. It is becoming popular year by year because of the convenience of being able to perform control.
Further, by individually providing the inverter circuits 2a and 2b for the plurality of discharge lamps 1a and 1b as described above, for example, even when one of the discharge lamps 1a becomes unlit due to the end of life or the like, the other Since the discharge lamp 1b can be turned on by the inverter circuit 2b without being affected by any influence, it has a feature that the entire lighting device is not turned off.

However, in the lighting device having the above structure,
While the discharge lamps 1a and 1b are lit, the discharge lamps 1a and 1b
Due to the optical noise emitted from (eg fluorescent lamps),
The infrared carrier wave propagating the remote control signal is affected, and the reaching distance of the remote control signal is shortened. For example, when the remote control signal is used in a relatively large room such as a living room of a general house, the illumination device and the remote control transmitter are separated from each other. If the distance is long, the optical noise may make it difficult for the lighting device to receive the remote control signal.

Here, it is considered that the optical noise mainly includes two factors. The first factor is the near-infrared spectrum generated when the discharge lamps 1a and 1b are turned on. That is, the remote control signal is propagated by the infrared rays sent from the light emitting diode provided in the remote control transmitter, and the light emitting diode having a light emission wavelength of 940 to 950 [nm] is mainly used. . On the other hand, when the discharge lamps 1a and 1b are fluorescent lamps, the wavelengths of radiation emitted from the argon gas enclosed in the discharge lamps 1a and 1b (near 920 [nm] and 96).
0 [nm]) and the wavelength of the radiation from mercury (1013
[Nm]) is generated, the light of the former wavelength is strong at the initial stage or low temperature of lighting of the discharge lamps 1a and 1b, and the light of the latter wavelength appears strongly during stable lighting. Note that FIG. 13 shows a typical example of the near-infrared spectrum in the case of a fluorescent lamp. That is, since the wavelength of the light emitting diode used in the remote control transmitter and the wavelength of the light in the near infrared region from the discharge lamps 1a and 1b are close to each other, the infrared carrier wave propagating the remote control signal has the above wavelength. It is considered that it is difficult to receive remote control signals due to the influence of light.

The second factor is that the discharge lamp 1
There is a relationship with the operating frequencies of the inverter circuits 2a and 2b that light a and 1b. That is, the remote controller may malfunction or malfunction due to mutual interference between a device using the remote controller and a lighting device that performs inverter lighting. In order to reduce this, the frequency of the infrared carrier wave is generally set to 33.
~ 40 [kHz], the operating frequency of the inverter circuit is 30
It is recommended that the frequency is set to [kHz] or lower or 40 [kHz] or higher, and most of the frequencies of the remote control devices and the inverter circuits which are currently popular are within the above range.

By the way, a receiving circuit (light receiving module) for receiving a remote control signal by infrared rays is generally shown in FIG.
The circuit configuration is as shown in. That is, infrared light is received by the photodiode PD, the received (received) signal is amplified by the amplifier 20, passes through the limiter 21, and is passed by the bandpass filter 22 so that only the signal of the infrared carrier frequency within the above frequency range is passed. The component corresponding to the operating frequency of the inverter circuit is attenuated so as not to be sent to the detection circuit 23 at the next stage. Then, the reception signal detected by the detection circuit 23 is processed by the waveform shaping circuit 24.
The waveform is shaped by and output. Note that FIG. 15 shows an example of the pass band characteristic of the band pass filter 22.

However, when the remote control reception control circuit 3 for receiving a remote control signal and the discharge lamps 1a, 1b are arranged very close to each other as in the above-described conventional lighting device, the inverter circuit is provided. The light of the discharge lamps 1a and 1b that are lit according to the operating frequencies of 2a and 2b is the light receiving portion (photodiode) of the remote control reception control circuit 3.
In some cases, the intensity of the incident light becomes stronger and the bandpass filter 22 of the receiving circuit cannot completely remove the operating frequency components of the inverter circuits 2a and 2b.
As a result, it is considered that it becomes difficult for the lighting device to receive the remote control signal.

[0009]

An optical filter is provided in front of the photodiode (pin photodiode) PD of the receiving circuit in order to prevent the difficulty in receiving the remote control signal due to the above-mentioned factors, that is, the reduction in the arrival performance of the remote control signal. A measure is provided to reduce the transmittance of light of the near infrared wavelength from the discharge lamps 1a and 1b to the photodiode PD, and to significantly reduce the gain of the bandpass filter 22 in the operating frequency range of the inverter circuits 2a and 2b. It is necessary to take measures such as adopting a receiver circuit with a trap frequency, or to increase the output of the light emitting diode of the remote control transmitter, which eventually leads to an increase in the cost of the entire lighting device. There is a problem that it becomes expensive.

An object of the present invention is to solve the above problems, and an object of the present invention is to provide an illuminating device having a simple configuration and improved remote controller signal arrival performance without increasing costs.

[0011]

In order to achieve the above-mentioned object, a first aspect of the present invention includes a plurality of discharge lamps, a plurality of inverter units for individually supplying high-frequency power to each discharge lamp, and a transmission from an external source. A remote control signal receiving unit that receives a remote control signal by infrared rays that are received, and controls multiple inverter units based on the remote control signal received by the remote control signal receiving unit to turn on / off and dimming each discharge lamp. In a lighting device including a control unit, operating frequencies of arbitrary two inverter units are f ₁ and f ₂ (f ₁ <f ₂ ) for all inverter units, and
And f _R frequencies of the infrared carrier wave over preparative control signal
Then, when n is a natural number, f _R ≠ f ₁ −n (f ₂ −f ₁ )
It is characterized in that the respective operating frequencies of the plurality of inverter units are set so as to satisfy the above relationship .

The invention of claim 2 is characterized in that, in the invention of claim 1, two inverter parts are provided. According to the invention of claim 3, in the invention of claim 1, at least 3
Two or more inverter units are provided, and two of the operating frequencies of any three inverter units are provided for all the inverter units.
Each operating frequency of the plurality of inverter units is set so that the frequency obtained by subtracting the remaining operating frequency from the sum of the one operating frequency does not become substantially equal to the frequency of the infrared carrier of the remote control signal.

The invention of claim 4 is the invention of claim 1 or claim 2.
In the invention, the operating frequencies of the plurality of inverter units are set to be substantially the same. According to a fifth aspect of the present invention, in the first aspect of the present invention, the operating frequencies of the plurality of inverter sections are frequencies higher than at least 40 [kHz], and any two inverter sections are provided for all the inverter sections. The operating frequencies of the inverters were set so that the frequency lower than the lower operating frequency minus three times the difference between the two operating frequencies does not become substantially equal to the infrared carrier frequency of the remote control signal. It is characterized by

According to a sixth aspect of the present invention, in the first aspect of the present invention, the operating frequencies of the plurality of inverter units are all different, and the infrared carrier frequency of the remote control signal is the lowest among the operating frequencies of the plurality of inverter units. It is characterized in that it is higher than the frequency and lower than the highest frequency, and that the operating frequencies of the plurality of inverter units are set so that the frequency of the carrier wave is not substantially equal to any operating frequency.

[0015]

According to a seventh aspect of the invention, a plurality of discharge lamps are provided,
Based on a plurality of inverter units that individually supply high-frequency power to each discharge lamp, a remote control signal reception unit that receives an infrared remote control signal transmitted from the outside, and a remote control signal received by the remote control signal reception unit In a lighting device including a control unit that controls a plurality of inverter units by controlling the discharge lamps to turn on / off and dimming each discharge lamp, an arbitrary number of inverters are provided for all the inverter units.
The frequency obtained by subtracting an integer multiple of the difference between the two operating frequencies from the lower operating frequency of the two inverter units is higher than 40 [kHz], and the frequency obtained by further subtracting the difference from the operating frequency is 33 [kHz. ] Each operating frequency of a plurality of inverter parts is set up so that it may become lower.

[0017]

[0018]

In the structure of the invention of claim 1, the operating frequencies of arbitrary two inverter units are set to f for all the inverter units.
₁ , f ₂ (f ₁ <f ₂ ) and the remote control signal
If the frequency of the infrared carrier is f _R and n is a natural number
Since the operating frequencies of the plurality of inverter units are set so as to satisfy the relationship of f _R ≠ f ₁ −n (f ₂ −f ₁ ), the operating frequency of the inverter unit and It is possible to prevent the infrared carrier wave of the remote control signal from being affected and obstructed by the optical noise emitted from the plurality of discharge lamps at a frequency deviated by the difference between any two operating frequencies. It is possible to improve the signal arrival performance.

According to the second aspect of the present invention, the number of inverters is two. Therefore, when two discharge lamps are lit by individual inverters, the operating frequency of the inverter and the difference between the two operating frequencies are deviated. It is possible to prevent the infrared carrier wave of the remote control signal from being affected and hindered by the optical noise emitted from each discharge lamp at the different frequency, and the arrival performance of the remote control signal can be improved. .

According to the configuration of the invention of claim 3, at least 3
Two or more inverter units are provided, and two of the operating frequencies of any three inverter units are provided for all the inverter units.
Since the operating frequencies of the multiple inverters are set so that the frequency obtained by subtracting the remaining operating frequency from the sum of the two operating frequencies does not become substantially equal to the frequency of the infrared carrier wave of the remote control signal, radiation from multiple discharge lamps is performed. It is possible to prevent the infrared carrier wave of the remote control signal from being affected and hindered by the generated optical noise, and it is possible to improve the arrival performance of the remote control signal.

In the configuration of the invention of claim 4, since the respective operating frequencies of the plurality of inverter sections are set to be substantially the same, the light having a frequency shifted by the difference between any two operating frequencies among the operating frequencies of the inverter section is set. Noise does not occur, and the arrival performance of the remote control signal can be improved. In the configuration of the invention of claim 5, the operating frequency of each of the plurality of inverter units is higher than at least 40 [kHz], and the lower one of the arbitrary two inverter units is operated with respect to all the inverter units. Since each operating frequency of the multiple inverters was set so that the frequency lower than the frequency obtained by subtracting three times the difference between the two operating frequencies from the frequency does not become substantially equal to the frequency of the infrared carrier wave of the remote control signal, It is possible to prevent the infrared carrier wave of the remote control signal from being affected and obstructed by the optical noise emitted from the lamp, and it is possible to improve the arrival performance of the remote control signal.

According to the invention of claim 6, the operating frequencies of the plurality of inverters are all different frequencies, and the frequency of the infrared carrier of the remote control signal is higher than the lowest frequency among the operating frequencies of the plurality of inverters. Since the operating frequencies of the multiple inverters are set so that the carrier wave frequency is lower than the maximum frequency and that the frequency of this carrier wave is not approximately equal to any operating frequency, the remote control signal of the remote control signal is generated by the optical noise emitted from the multiple discharge lamps. It is possible to prevent the infrared carrier wave from being affected and hindered, and improve the arrival performance of the remote control signal.

[0023]

According to the configuration of the invention of claim 7, the frequency obtained by subtracting an integer multiple of the difference between the two operating frequencies from the lower operating frequency of the operating frequencies of the arbitrary two inverter units is applied to all the inverter units. The frequency is higher than 40 [kHz], and the frequency obtained by subtracting the difference from the frequency is 33.
Since each operating frequency of the plurality of inverters is set to be lower than [kHz], it is possible to prevent the infrared carrier wave of the remote control signal from being affected and hindered by the optical noise emitted from the plurality of discharge lamps. Therefore, the arrival performance of the remote control signal can be improved.

[0025]

[0026]

First, the basic principle of the present invention will be described. The basic configuration of the lighting device in the following embodiments is common to the lighting device in the conventional example. FIG. 2 shows the appearance of the lighting device.
A discharge lamp 1a composed of a round fluorescent lamp is provided in a main body 10 in which circuit parts such as 2b and a remote control reception control circuit 3 are incorporated.
1b is attached, and a remote control light receiving unit 11 for receiving an infrared carrier wave of a remote control signal is provided on the lower surface of the main body 10.

The two discharge lamps 1a and 1b are shown in FIG.
Inverter circuits 2a, 2 as shown in (a) and (b)
Since the lamp is lit by the high frequency lamp current supplied from the discharge lamp b,
The following experiments were conducted, assuming that there is some relationship between the optical noise emitted from the lamp and the lamp current. Here, in the lighting device used in the experiment, one of the discharge lamps 1
Round fluorescent lamp (model number: FCL32 manufactured by Matsushita Electric Works) in a
A circular fluorescent lamp (model number: FCL30 manufactured by Matsushita Electric Works, Ltd.) is used for the other discharge lamp 1b, and an operating frequency f ₁ = for the inverter circuit 2a that supplies a lamp current to the discharge lamp 1a.
The effective value of the lamp current during stable lighting at 52.5 [kHz] is 450 [mArms], and the operating frequency f ₂ = 5 for the inverter circuit 2b that supplies the lamp current to the discharge lamp 1b.
A lamp with an effective value of 600 [mArms] of the lamp current at stable lighting at 4.0 [kHz] was used.

First, FIGS. 3 (a) and 3 (b) are supplied to the discharge lamps 1a and 1b from the respective inverter circuits 2a and 2b.
When a frequency analysis of the lamp current as shown in FIG. 4 is performed using an FFT analyzer (YHP model number: HP3561A, TEGMA current probe 91550-1), frequency components included in each lamp current as shown in FIG. The waveform that appeared was obtained. Since the lamp current is not a perfect sine wave, the frequency component of the lamp current harmonics _{2f 1, 3f 3 ..., 2f} 2, 3f 3 ... are included.

Next, the inventor of the present application has found that the light from the two discharge lamps 1a and 1b is simultaneously incident on the photodiode PD for receiving the remote control signal of the lighting device.
Considering that the combined value of the lamp currents of these two discharge lamps 1a and 1b may have some influence, the frequency component of the combined current was measured using an FFT analyzer. 5 (a) and 5 (b) show the results, and the levels of the portions of the _two discharge lamps 1a and 1b at the fundamental frequencies f ₁ and f ₂ are highest. This is natural from the results of individual frequency analysis of the lamp current, but in addition to that, a large number of frequency components appear on the low frequency side and high frequency side of the fundamental frequencies f ₁ and f ₂ . Moreover, these frequency components are the two fundamental frequencies f ₁ and f ₂
The difference Δf = f ₂ −f ₁ = 1.5 [kHz] is present, and it can be confirmed that the frequency component on the low frequency side extends to the frequency range of the infrared carrier wave of the remote control signal. . Furthermore, the operating frequencies of the inverter circuits 2a and 2b were changed, and measurements were also made in the cases of Δf = 1, 3, 5 [kHz]. Similarly, the fundamental frequencies f ₁ and f ₂ were set to the low frequency side and the high frequency side. It was confirmed that a large number of frequency components exist with a deviation for each Δf.

In addition, the inventor of the present application places an optical sensor at a location where a photodiode PD for receiving a remote control signal of the lighting device is provided, and the photosensor emits light from the discharge lamps 1a and 1b. The frequency component of light was measured. FIG. 6 shows the result, and in the photodiode PD, in addition to the light corresponding to the fundamental frequencies f ₁ and f ₂ , light shifted by Δf (= 1.5 [kHz]) is incident. Became clear. In the experiment, a photodetector for optical waveform observation (S3887 manufactured by Hamamatsu Photonics) using a high-speed PIN photodiode as a photosensor and a high-speed operational amplifier was used.

From the above experimental results, a plurality of discharge lamps 1
When the a and 1b are individually turned on by the inverter circuits 2a and 2b, the noise component corresponding to the difference between the operating frequencies of the inverter circuits 2a and 2b is generated by the discharge lamps 1a and 1b.
It was found to be included in the light emitted from. It is considered that the remote control signal is affected by the noise component, and the arrival performance of the remote control signal is hindered.

Therefore, in order to suppress the influence of the noise component on the remote control signal, it is sufficient that the frequency of the infrared carrier wave of the remote control signal and the frequency of the noise component do not substantially match. That is, since the bandpass filter 22 of the receiving circuit is set to have the highest sensitivity to the frequency of the infrared carrier wave of the remote control signal, the frequency of the noise component and the frequency of the infrared carrier wave are not made to substantially coincide with each other. The sensitivity to the noise component of the light emitted from the discharge lamps 1a and 1b incident on is deteriorated, and the remote control arrival performance can be improved.

(Embodiment 1) Therefore, in the present embodiment, the inverter circuit 2 is based on the principle described above.
arbitrary two inverter circuits 2a, 2 for a, 2b
The operating frequencies f ₁ and f _{2 of} b, a frequency obtained by subtracting an integer multiple of the difference Δf between the two operating frequencies from the lower operating frequency f _{1 of} these two, and 2 from the operating frequency higher of these two. Each inverter circuit 2 is configured so that neither the frequency obtained by adding an integer multiple of the difference Δf between the two operating frequencies becomes substantially equal to the frequency of the infrared carrier wave of the remote control signal.
The operating frequencies of a and 2b are set. That is, assuming that the frequency of the infrared carrier wave of the remote control signal is f _R , the operating frequency of each inverter circuit 2a, 2b is set so as to satisfy the following equation (1) for the two inverter circuits 2a, 2b.

F _R ≠ f ₁ −nΔf (n = 1, 2, ...) (1) The above equation (1) can also be expressed as the following equation (2). {F ₁ − (n + 1) Δf} <f _R <{f ₁ −nΔf} (2) where n = 0, 1, 2, ... According to the above configuration, the remote controller signal arrival performance of conventional optical noise is Discharge lamps 1a, 1 which were the main obstacles
Since the third factor other than the near-infrared spectrum radiated from b and the operating frequency of the inverter circuits 2a and 2b has been confirmed, the inverter circuit 2 which is the third factor is confirmed.
It is possible to reduce the influence on the remote control signal due to the optical noise appearing that is deviated by an integer multiple of the difference between the operating frequencies of a and 2b, and moreover, only by changing the operating frequency of the inverter circuits 2a and 2b, the cost is increased. It won't even invite you.

As shown in FIG. 6, the discharge lamp 1
The frequency component of the optical noise generated by the difference Δf between the fundamental frequencies f ₁ and f ₂ of a and 1b is f ₁ −3 (f ₂ −f ₁ )
It is a small level that is almost inconspicuous on the lower frequency side than the third-order component represented by the above. This is because the component due to the difference Δf becomes small when n> 3 in the above formulas (1) and (2). It indicates that Therefore, when the number of the discharge lamps 1a and 1b is two as in this embodiment, in order to substantially eliminate the influence of the optical noise on the remote control signal, in the formula (2), f _R <f ₁ The operating frequencies of the inverter circuits 2a and 2b may be set so as to satisfy −3Δf.

(Embodiment 2) The basic structure of the illumination device in this embodiment is the same as that of the conventional example and the first embodiment. However, in the lighting device of the present embodiment, the inverter circuit 2 that is generated in synchronization with the power supply fluctuation or the power supply cycle of the AC power supply AC
For the power supply voltage ripple of a and 2b, the discharge lamp 1a,
The remote controller reception control circuit 3 controls the inverter circuits 2a and 2b to keep the lamp current substantially constant so that the light output from 1b becomes substantially constant. Specifically, the power supply voltage of the AC power supply AC or the inverter circuits 2a and 2b
The remote controller reception control circuit 3 changes the operating frequencies f ₁ and f ₂ of the inverter circuits 2a and 2b in accordance with the DC voltage obtained by internally converting the power supply voltage as the input. When the operating frequencies f ₁ and f ₂ of the inverter circuits 2a and 2b are changed as described above, the operating frequency has a width of, for example, several kHz with respect to the center frequency thereof, as shown in FIG.

In this embodiment, the center frequency of the operating frequencies of the two inverter circuits 2a and 2b is f ₁
(= 51 [kHz]) and f ₂ (= 53 [kHz]), and the fluctuation widths of the respective frequencies are Δf ₁ and Δf ₂ , instead of f ₁ in the formula (2) described in the first embodiment. f ₂ ± Δf ₂ , instead of f ₁ ± Δf ₁ , f ₂
Instead of Delta] f substituting _{(f 2 -f 1) ± (} Δf 2 ± Δf 1), which sets the operating frequency of the inverter circuits 2a, 2b so as to satisfy the following formula (3).

{F ₁ ± Δf ₁ − (n + 1) [(f ₂ −f ₁ ) ± (Δf ₂ ± Δf ₁ )]} <f _R <{f ₁ ± Δf ₁ −n [(f ₂ −f ₁ ) ± (Δf ₂ ± Δf ₁ )]} (3) where n = 0, 1, 2, ... Set the operating frequencies of the inverter circuits 2a and 2b so as to satisfy the equation (3) as described above. For example, as in the case of the first embodiment, it is possible to reduce the influence on the remote control signal due to the optical noise that appears by being shifted by an integral multiple of the difference between the operating frequencies of the inverter circuits 2a and 2b.

(Embodiment 3) The basic structure of the illumination device in this embodiment is also common to the conventional example and the first and second embodiments. As described above, since the optical noise that appears with an integer multiple of the difference between the operating frequencies of the inverter circuits 2a and 2b appears as an obstacle to the arrival performance of the remote control signal,
If the operating frequencies of the two inverter circuits 2a and 2b are made equal, the frequency distribution of the combined current of the lamp currents flowing through the two discharge lamps 1a and 1b will have waveforms as shown in FIGS. 8 (a) and 8 (b). That is, the two inverter circuits 2
Δf (= the difference between the operating frequencies f ₁ and f ₂ of a and 2b)
Since f ₂ −f ₁ ) becomes almost zero, noise of frequency components deviated by Δf does not exist on the high frequency side and the low frequency side of each operating frequency f ₁ , f ₂ .

Therefore, by setting the operating frequencies f ₁ and f ₂ of the inverter circuits 2a and 2b to values different from the frequency of the infrared carrier wave of the remote control signal, the optical noise affecting the remote control signal does not exist, The reach of remote control signals can be extended. The number of the inverter circuits 2a and 2b is not limited to two,
Even in the case of three or more, it goes without saying that the same effect can be obtained by making all the operating frequencies equal.

(Embodiment 4) The basic structure of the illuminating device in this embodiment is also the same as that of the conventional example and the first to third embodiments. However, in the case of the lighting device in this embodiment, the number of the discharge lamps 1a to 1c and the number of the inverter circuits 2a to 2c are each three. Here, each inverter circuit 2a-
The operating frequencies of 2c are f ₁ = 50.25 [kH]
z], f ₂ = 52.65 [kHz], f ₃ = 55.95
When the frequency component of the combined value of the lamp currents of the discharge lamps 1a to 1c lit by the respective inverter circuits 2a to 2c was measured using an FFT analyzer in the case of [kHz], the results shown in FIG. 9 were obtained. Was obtained. That is, as shown in FIG. 9, 40 [kHz] -60
In the frequency components of the combined value of the lamp current in the range of [kHz], in addition to the operating frequencies f ₁ , f ₂ and f ₃ , A in FIG.
There are frequency components indicated by L. Here, it can be seen that the frequency components A to L and the operating frequencies f ₁ , f ₂ , and f ₃ have a relationship as shown in Table 1 below.

[0042]

[Table 1]

As shown in Table 1, each frequency component A to L
Is the operating frequency f₁~ F₃Any two operation cycles of
Components related to the difference in wave number (A to D, F, H, I, K,
L) and components related to the sum and difference of the three operating frequencies
(E, G, J) exist. Therefore, Rimoco
The infrared carrier of the signal is transmitted to each of these frequency components A to L.
In order not to be affected by the corresponding optical noise,
In the present embodiment, the frequency f of the infrared carrier wave_RThe value of
Each operating frequency f₁~ F₃And frequencies of each frequency component A to L
In order not to match the number,
Operating frequency f₁~ F ₃The value of is set. By this
Can improve the reachability of remote control signals
It is a thing.

Further, the operating frequency of the inverter circuit 2c
The inverter circuit 2d having a higher operating frequency is added.
In addition, the four discharge lamps 1a to 1d are connected to these invars.
Of the lamp currents when the lamp circuits 2a to 2d are turned on.
The frequency component of the set value was measured using an FFT analyzer
However, the result as shown in FIG. 10 was obtained. That is, the figure
As seen in 10, 40 [kHz] to 60 [kHz
z], the frequency component of the combined value of the lamp current is
Production frequency f₁~ F_FourThere are frequency components other than
If the classification of these frequency components is A'to M ', A'
The component is the operating frequency f₁, F₂Component by the difference of
Minute is operating frequency f₁, F₃Difference component of C'component
Is the operating frequency f₁, F_FourThe component due to the difference of
Operating frequency f₂, F₃The component due to the difference of
Production frequency f₃, F_FourThere are three F'components due to the difference of
Operating frequency f₁, F₂, F_FourSum and difference components (f₁+
f₂-F_Four), G'component has three operating frequencies f₁，
f₂, F₃Sum and difference components (f₁+ F₂-F₃), H ’
The components are three operating frequencies f₁, F₃, F_FourThe sum and difference of
Minute (f₁+ F₃-F_Four), I'component has three operating frequencies
f₁, F₂, F₃Sum and difference components (f₁-F₂+
f₃), The J'component has three operating frequencies f₁, F₂, F_Four
Sum and difference components (f₁-F₂+ F_Four), Three K'components
Operating frequency f₁, F₂, F_FourSum and difference components (-f₁
+ F₂+ F_Four), The L'component has three operating frequencies f₂, F
₃, F_FourSum and difference components (-f₂+ F₃+ F_Four), M ’
The components are three operating frequencies f₁, F₃, F_FourThe sum and difference of
Minute (-f₁+ F₃+ F_Four). The operating frequency f
₁~ F_FourAs the frequency component due to, for example, the operating frequency f
₂, F_FourComponent due to the difference of three operating frequencies f₁，
f₃, F_FourSum and difference components (f₁-F ₃+ F_Four) Such as
Are expected to exist, but these are the other frequency components A '~
Its level is lower than that of M'or other frequency components.
Because it is buried in the minute, it becomes an FFT analyzer.
It is thought that it cannot be specified by the frequency analysis.

Therefore, the discharge lamps 1a to 1d and
Even if the number of inverter circuits 2a to 2d becomes four,
The infrared carrier of the input signal is the above-mentioned frequency components A'to M '.
In order not to be affected by optical noise corresponding to
Is the frequency f of the infrared carrier _RIs the operating frequency f₁
~ F_FourAnd the frequency of each frequency component A'to M '
Therefore, the operating frequency f of each inverter circuit 2a to 2d
₁~ F_FourYou can set the value of. Examples 1-3 above and
With the configuration of this embodiment, a plurality of discharge lamps 1a ...
When lighting with the inverter circuit 2a ...
The operating frequency f of the circuit 2a ...₁, F₂... f_k(However, f
₁<F₂… <F_k) And these multiple inverter circuits
Of any two inverter circuits 2a ... Of 2a ...
The difference in operating frequency Δf is Δf_(h2-h1)= F_h2-F_h1(1 ≦
h₁<H₂≤k), each inverter circuit 2a ...
Operating frequency f₁... is less than the following formula (4) or (5)
If at least one is satisfied, the effect of optical noise
It is possible to improve the reachability of remote control signals without
Wear. {F_h1-(N + 1) Δf_(h2-h1)} <F_R<{F_h1-NΔf_(h2-h1)}… (4) {F_h2+ (N + 1) Δf_(h2-h1)} <F_R<{F_h2-NΔf_(h2-h1)}… (5) However, n = 0, 1, 2, ... Alternatively, the following expression (6) may be satisfied.

F _R ≠ f _i + f _j −f _m (6) i ≠ j ≠ m, i, j, m = 1, 2, 3 ... k In addition, any inverter circuit among the plurality of inverter circuits 2 a. It goes without saying that the operating frequencies f ₁ ... Of 2a ... May be set equally. (Embodiment 5) The configuration of the illumination device in this embodiment is the same as that of the conventional example and the first embodiment. In the lighting device of the present embodiment, as shown in FIG. 11, the operating frequencies f ₁ and f _{2 of the} two inverter circuits 2a and 2b and the difference Δ between them.
For example, f ₁ <f so that the frequency f _R of the infrared carrier wave of the remote control signal exists between the frequency components adjacent to the frequency components of the optical noise that are present by being shifted by f = f ₂ −f _1.
Inverter circuits 2a and 2b so that _R <f ₂ is satisfied
The operating frequencies f ₁ and f ₂ are set.

As described above, each inverter circuit 2a, 2b
If the operating frequency is set, the inverter circuits 2a, 2b
It is possible to prevent the optical noise caused by the operating frequencies f ₁ and f ₂ from affecting the infrared carrier wave, and improve the arrival performance of the remote control signal. In this embodiment, the case where the discharge lamps 1a and 1b and the inverter circuits 2a and 2b are two has been described, but the present invention is not limited to this, and the case where the discharge lamps 1a and the inverter circuits 2a are three or more. Similarly, if the carrier frequency f _R exists between the operating frequencies f ₁ of the inverter circuits 2a, the same effect can be obtained.

(Embodiment 6) The structure of the illumination device in this embodiment is the same as that of the conventional example and the first embodiment. In the lighting device of the present embodiment, two inverter circuits 2a,
The operating frequencies f ₁ and f ₂ of 2b are respectively f ₂ > 40
[KHz] and 20 [kHz] ≦ f ₁ <33 [kHz]
Is set to satisfy. That is, the frequency f _R of the infrared carrier wave of the remote control signal is usually 33 [kHz].
Is set within the range of 40 kHz to 40 [kHz], and the operating frequencies f ₁ and f ₂ of the inverter circuits 2a and 2b are set so as to satisfy the above equations.
It is possible to prevent the optical noise caused by the operating frequencies f ₁ and f ₂ of 2b from affecting the infrared carrier wave, and improve the arrival performance of the remote control signal.

The lower operating frequency f ₁ of the inverter circuits 2a and 2b is set to 20 [kHz] or higher because if the operating frequency f ₁ is lower than 20 [kHz], it is audible to humans. Since the sound enters the frequency range and can be heard as noise by human ears, the lower limit is 20 [kHz] in order to prevent the generation of such noise.

(Embodiment 7) The illumination device of the present embodiment
The configuration is the same as that of the conventional example and the first embodiment. Implementation
In the example lighting device, two inverter circuits 2a,
2b operating frequency f₁, F₂Optical noise due to the difference of
Of the infrared carrier wave of the remote control signal
Does not exist in the wave number band (33 [kHz] -40 [kHz])
The operating frequency f₁, F₂Is set. sand
That is, the operating frequency f of each inverter circuit 2a, 2b₁，
f₂Is {f₁− (N + 1) Δf} <33 [kHz] and
{F ₁-NΔf}> 40 [kHz]
I have decided. However, n = 0, 1, 2, ... By this
The operating frequency f of the inverter circuits 2a and 2b₁, F ₂
The optical noise caused by
Can be prevented, improve the remote control signal arrival performance
Can be made.

(Embodiment 8) The configuration of the lighting device in this embodiment is the same as that of the conventional example and the first embodiment. In the lighting device of the present embodiment, the operating frequencies f ₁ and f ₂ of the inverter circuits 2a and 2b satisfy the relationship of f _R <f ₁ <f ₂ with respect to the frequency f _R of the infrared carrier of the remote control signal. The discharge lamp 1a, which is turned on by the inverter circuit 2a having the operating frequency f ₁ closer to the frequency f _R of the infrared carrier wave, is set from the remote control light receiving unit 11 provided on the lower surface of the main body 10 as shown in FIG. It is located at a distant position. That is, the operating frequency f
_The discharge lamp 1b which is turned on by the _second inverter circuit 2b is mounted on the side of the main body 10 near the remote control light receiving unit 11, and the other discharge lamp 1a is mounted on the outside thereof.

According to the above configuration, the distance between the discharge lamp 1a, which is lit by the inverter circuit 2a having the operating frequency f ₁ close to the frequency f _R of the infrared carrier wave of the remote control signal, and the remote control light receiving section 11 can be increased. Because you can
The influence of the optical noise from the discharge lamp 1a on the remote control signal can be reduced, and the arrival performance of the remote control signal can be further improved.

In this embodiment, the inverter circuit 2
Operating frequency f of a and 2b₁, F₂Is f _R<F₁<F₂When
I will explain about the case where it is set to satisfy the relationship
However, for example, f₁<F_R<F₂Or f₁<F
₂<F_RWhen it is set to satisfy the relationship
However, in short, the frequency f of the infrared carrier wave_RCloser to
Operating frequency f₁, F₂Of the inverter circuits 2a and 2b of
The remote control light-receiving unit 11 controls the discharge lamps 1a and 1b that are turned on.
If it is attached to the main body 10 away from the
To the remote control signal of the optical noise from the electric lamps 1a, 1b
The influence can be reduced and the remote controller signal arrival performance
Can be further improved. In addition,
The number of pumps 1a ... and inverter circuits 2a ... is limited to two.
However, even if three or more
Of the infrared carrier frequency f_ROperating frequency closest to
Number f₁Discharge circuit lighted by the inverter circuit 2a of ...
Body 1 so that the pump 1a ...
It should be attached to 0. Or the frequency of the infrared carrier
f_RFarthest operating frequency f₁Inverter circuit 2a
The remote control light receiving unit 1 is provided with a discharge lamp 1a which is turned on by.
It may be attached to the main body 10 closer to 1. It
In addition, the operating frequency f of the plurality of inverter circuits 2a ...₁…
Can be set as described in Examples 1-7 above.
The remote controller signal arrival performance.
Wear.

[0054]

According to the invention of claim 1, a plurality of discharge lamps, a plurality of inverter units for individually supplying high-frequency power to each discharge lamp, and a remote controller for receiving a remote control signal by infrared rays transmitted from the outside. In a lighting device including a signal receiving unit and a control unit that controls a plurality of inverter units based on a remote control signal received by the remote control signal receiving unit to turn on / off and dimming each discharge lamp, With respect to the inverter units, the operating frequencies of two arbitrary inverter units are f ₁ , f ₂ (f ₁ <
f ₂ ) and the infrared carrier of the remote control signal
Where f _R is the frequency and n is a natural number, f _R ≠ f ₁
Since the operating frequencies of the plurality of inverter units are set so as to satisfy the relationship of −n (f ₂ −f ₁ ), the operating frequency of the inverter unit and the frequency deviated by the difference between any two operating frequencies among them. It is possible to prevent the infrared carrier wave of the remote control signal from being affected and hindered by the optical noise emitted from the plurality of discharge lamps, and it is possible to improve the arrival performance of the remote control signal. effective. In addition, the reachability of remote control signals can be improved without using an optical filter or an expensive light receiving module.
The output level of the transmitter on the side transmitting the remote control signal can be reduced, and the cost can be reduced.

According to the second aspect of the present invention, since the number of the inverter units is two, when the two discharge lamps are lit by the individual inverter units, the operating frequency of the inverter unit and the frequency deviated by the difference between the two operating frequencies. It is possible to prevent the infrared carrier wave of the remote control signal from being affected and hindered by the optical noise radiated from each discharge lamp, and it is possible to improve the delivery performance of the remote control signal. There is.

According to a third aspect of the present invention, at least three or more inverter sections are provided, and for all the inverter sections, the sum of the two operating frequencies among the operating frequencies of the arbitrary three inverter sections is used to determine the remaining operating frequency. Since the operating frequencies of the multiple inverters are set so that the frequency obtained by subtracting does not become approximately equal to the frequency of the infrared carrier wave of the remote control signal, the infrared noise of the remote control signal is generated by the optical noise emitted from multiple discharge lamps. There is an effect that it is possible to prevent the carrier wave from being affected and disturbed, and to improve the arrival performance of the remote control signal.

According to the fourth aspect of the present invention, since the operating frequencies of the plurality of inverter units are set to be substantially the same, optical noise having a frequency deviated by a difference between any two operating frequencies of the operating frequencies of the inverter unit is generated. There is an effect that it is possible to improve the arrival performance of the remote control signal. According to a fifth aspect of the present invention, each operating frequency of the plurality of inverter sections is a frequency higher than at least 40 [kHz] and is lower than the lower operating frequency of any two inverter sections with respect to all the inverter sections. Since each operating frequency of the inverter units was set so that the frequency lower than the frequency obtained by subtracting 3 times the difference between the two operating frequencies does not become substantially equal to the frequency of the infrared carrier wave of the remote control signal, It is possible to prevent the infrared carrier wave of the remote control signal from being influenced and hindered by the radiated optical noise, and it is possible to improve the arrival performance of the remote control signal.

According to a sixth aspect of the present invention, the operating frequencies of the plurality of inverter units are all different frequencies, and the frequency of the infrared carrier of the remote control signal is higher than the lowest frequency of the operating frequencies of the plurality of inverter units and the highest frequency. Since the operating frequency of each inverter is set so that the frequency of this carrier is not lower than the operating frequency, the infrared carrier of the remote control signal is generated by the optical noise emitted from the multiple discharge lamps. Can be prevented from being affected and hindered, and the arrival performance of the remote control signal can be improved.

[0059]

According to the invention of claim 7 , a plurality of discharge lamps are provided,
Based on a plurality of inverter units that individually supply high-frequency power to each discharge lamp, a remote control signal reception unit that receives an infrared remote control signal transmitted from the outside, and a remote control signal received by the remote control signal reception unit In a lighting device including a control unit that controls a plurality of inverter units by controlling the discharge lamps to turn on / off and dimming each discharge lamp, an arbitrary number of inverters are provided for all the inverter units.
The frequency obtained by subtracting an integer multiple of the difference between the two operating frequencies from the lower operating frequency of the two inverter units is higher than 40 [kHz], and the frequency obtained by further subtracting the difference from the operating frequency is 33 [kHz. Since the operating frequencies of the plurality of inverters are set to be lower, it is possible to prevent the infrared carrier wave of the remote control signal from being affected and hindered by the optical noise emitted from the plurality of discharge lamps. Therefore, there is an effect that the arrival performance of the remote control signal can be improved.

[0061]

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing a first embodiment.

FIG. 2 is a plan view showing the appearance of the above.

3 (a) and 3 (b) are waveform diagrams of a lamp current flowing through the discharge lamp in the above.

4 (a) and 4 (b) are waveform diagrams showing frequency components of a lamp current flowing through the discharge lamp shown in FIG.

5 (a) and 5 (b) are waveform diagrams showing frequency components of a lamp current flowing through the discharge lamp in the above.

FIG. 6 is a diagram illustrating an operation of the above.

FIG. 7 is an explanatory diagram illustrating an operation of the second embodiment.

8A and 8B are explanatory diagrams for explaining the operation of the third embodiment.

FIG. 9 is an explanatory diagram illustrating an operation of the fourth embodiment.

FIG. 10 is an explanatory diagram illustrating an operation of the above.

FIG. 11 is an explanatory diagram illustrating an operation of the fifth embodiment.

FIG. 12 is a plan view showing the appearance of a lighting device according to an eighth embodiment.

FIG. 13 is an explanatory diagram illustrating an operation of a conventional example.

FIG. 14 is a circuit block diagram showing a main part of the above.

FIG. 15 is an explanatory diagram illustrating an operation of the above.

[Explanation of symbols]

1a, 1b discharge lamp 2a, 2b inverter circuit 3 Remote control reception control circuit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI H05B 41/38 H04B 9/00 P (56) References JP-A-57-25697 (JP, A) JP-A-5-152082 ( JP, A) JP-A-5-152085 (JP, A) JP-A-57-25697 (JP, A) Actual opening 1-110583 (JP, U) Actual opening 1-113996 (JP, U) (58 ) Fields surveyed (Int.Cl. ⁷ , DB name) H05B 37/02 H04B 10/00 H04Q 9/00 301 H04Q 9/00 311 H05B 41/24 H05B 41/38

Claims (7)

(57) [Claims] 1. A plurality of discharge lamps, a plurality of inverter sections for individually supplying high-frequency power to each discharge lamp, a remote control signal receiving section for receiving a remote control signal by infrared rays transmitted from the outside, and a remote control signal. In a lighting device including a control unit that controls a plurality of inverter units based on a remote control signal received by a receiving unit to perform lighting / extinction and dimming of each discharge lamp, an arbitrary lighting unit for all inverter units The operating frequencies of the two inverters are f ₁ and f ₂ (f ₁ <f ₂ ) and the remote controller
Let f _R be the frequency of the infrared carrier wave of the troll signal, and let n be
Assuming a natural number, the relation of f _R ≠ f ₁ −n (f ₂ −f ₁ )
An illuminating device characterized in that the respective operating frequencies of a plurality of inverter units are set so as to satisfy the conditions . 2. The lighting device according to claim 1, wherein the number of inverter units is two. 3. At least three inverter units are provided, and a frequency obtained by subtracting the remaining operating frequency from the sum of two operating frequencies among the operating frequencies of any three inverter units is provided for all the inverter units. 2. The lighting device according to claim 1, wherein each operating frequency of the plurality of inverter units is set so as not to be substantially equal to the frequency of the infrared carrier wave of the remote control signal. 4. The operating frequency of each of the plurality of inverter units is set to be substantially the same.
Illumination device described. 5. The operating frequency of each of the plurality of inverter units is higher than at least 40 [kHz], and is lower than the operating frequency of the lower one of the arbitrary two inverter units with respect to all the inverter units. 2. The operating frequencies of the plurality of inverter units are set so that a frequency lower than a frequency obtained by subtracting three times the operating frequency difference does not become substantially equal to the frequency of the infrared carrier wave of the remote control signal. Lighting equipment. 6. The operating frequencies of the plurality of inverter sections are all different frequencies, and the frequency of the infrared carrier of the remote control signal is higher than the lowest frequency and lower than the highest frequency among the operating frequencies of the plurality of inverter sections, and further, 2. The lighting device according to claim 1, wherein the operating frequencies of the plurality of inverter units are set so that the frequency of the carrier wave is not substantially equal to any operating frequency. 7. A plurality of discharge lamps, a plurality of inverter sections for individually supplying high-frequency power to each discharge lamp, a remote control signal receiving section for receiving a remote control signal by infrared rays transmitted from the outside, and a remote control signal. a lighting device that includes a control multiple inverter control section for turning on and off and dimming of the discharge lamp on the basis of the remote control signal received by the receiver, the total
For any two inverter units,
Two operating frequencies lower than the lower operating frequency
The frequency obtained by subtracting an integer multiple of the difference in wave number is 40 [kHz].
Higher frequency and the frequency obtained by further subtracting the above difference from the frequency
Number of Inverters so that the number is lower than 33 [kHz]
An illuminating device characterized in that each operating frequency of the monitor is set .