KR20090053212A - Color lighting apparatus controlled by sound - Google Patents

Abstract

The present invention relates to a color light illumination device that responds to sound, wherein the microphone converts a received acoustic signal into an electrical signal and outputs the electrical signal, and three first to third frequency bands differently set from the acoustic signal output from the microphone. Multi-band pass filter for filtering and outputting independently of each other, first, second and third light sources for emitting light of different colors, and first to third frequency bands output from the multi-band pass filter. And a control unit for controlling the luminance of each of the first to third light sources that are set to be matched one-to-one corresponding to each signal level. According to the color light illuminating device responding to the sound, the brightness of the light source emitting light of different colors is adjusted according to the level of the frequency band of the received sound signal, thereby providing an advantage of providing color light of various color sums. do.

Color light, sound, band filter

Description

Color lighting apparatus controlled by sound

The present invention relates to a color light illuminating device responsive to sound, and more particularly, to a color light illuminating device responsive to a sound such that a combination of emission colors can be varied according to the sound level of the sound signal input through the microphone. will be.

The lighting device basically provides light to obtain human visual information.

Most of these lighting devices have a structure that considers the function of brightening the dark and visual decorative effects.

However, since the light stimulates the eyes, it may make a person tired or comfortable depending on the color and illumination of the light, and visually perceived items, such as the value of the displayed goods or the side dishes on the table. The texture may vary.

Therefore, in consideration of the emotional stimulation function of the lighting, in recent years, a variety of researches on lighting that can provide light of various colors that can stimulate human emotion as well as providing a simple visual information. .

As an example of emotional lighting, a control circuit of a lamp capable of adjusting the brightness of a light source in response to sound is disclosed in Korean Utility Model Model No. 019248.

By the way, the lamp control circuit is to adjust the brightness of the lamp according to the level of the sound signal output from the microphone, it is possible to simply adjust the brightness according to the sound level, there is a disadvantage that does not implement a variety of tones.

The present invention was devised to improve the above problems, and responds to sounds capable of realizing various color lights by adjusting the brightness of light of different colors according to the level of the frequency band of the sound signal corresponding to the sound source band. The purpose is to provide a color light illumination device.

In order to achieve the above object, a color light illuminating device responsive to a sound according to the present invention comprises: a microphone for converting a received acoustic signal into an electrical signal and outputting the electrical signal; A multi-band pass filter unit which independently filters and outputs three first to third frequency bands differently set from the sound signal output from the microphone; First, second, and third light sources that emit light of mutually different colors; And a control unit for controlling the luminance of each of the first to third light sources set to be matched one-to-one corresponding to the signal level of each of the first to third frequency bands output from the multi-band pass filter unit. .

Preferably, the multi-band pass filter unit is a low pass filter for filtering the first frequency band signal which is a low frequency band set from the sound signal output from the microphone; A mid-pass filter for passing a second frequency band signal, which is an intermediate frequency band set from the sound signal output from the microphone; A high pass filter for passing a third frequency band signal, which is a high frequency band signal set from the sound signal output from the microphone; A first amplifier for amplifying the signal output from the low pass filter; A second amplifier for amplifying the signal output from the midpass filter; And a third amplifier for amplifying the signal output from the high pass filter.

More preferably, the first light source emits red light, the second light source emits green, and the third light source emits blue light.

In addition, each of the first to third amplifiers is further provided with a gain adjuster for adjusting the amplification gain.

According to an aspect of the present invention, the control unit includes: a first peak and level detector for detecting a peak of a signal output from the first amplifier and outputting a level signal corresponding to the detected peak; A second peak and level detector for detecting a peak of a signal output from the second amplifier and outputting a level signal corresponding to the detected peak; A third peak and level detector detecting a peak of the signal output from the third amplifier and outputting a level signal corresponding to the detected peak; A first driver for outputting driving power corresponding to the level output from the first peak and the level detector; A second driver for outputting driving power corresponding to a level output from the second peak and the level detector; A third driver for outputting driving power corresponding to the level output from the third peak and level detector; And a light source selection switch unit configured to selectively connect the output terminals of the first to third driving units with any one of the first to third light sources.

In addition, the first to the third light source is installed in a housing having an opening that is open upward, and has a transparent cap for closing the opening of the housing, the inner surface of the transparent cap from the first to third light source An uneven pattern is formed to diffuse the emitted light.

According to the color light illuminating device responsive to the sound according to the present invention, the brightness of light sources emitting light of different colors according to the frequency band level of the received sound signal can be adjusted to provide color light of various color sums. Provide advantages.

Hereinafter, with reference to the accompanying drawings will be described in more detail a color light illuminating device in response to sound according to a preferred embodiment of the present invention.

1 is a block diagram showing a color light illuminating device responsive to sound according to the present invention.

Referring to FIG. 1, the color light illuminator responsive to sound includes a microphone 110, a multi-band pass filter unit 120, a control unit 140, and first to third light sources 171, 173, and 175. It is provided.

The microphone 110 converts the received sound signal into an electrical signal and outputs the electrical signal.

The multi-band pass filter unit 120 independently filters and outputs three first to third frequency bands differently set from the sound signal output from the microphone 110.

The multi-band pass filter unit 120 may include a low pass filter (LPF) 121, a mid pass filter (BPF) 123, and a high pass filter (HPF) 125. And first to third amplifiers 131, 133 and 135, and first to third gain adjusters 132, 134 and 136.

The low pass filter 121 filters and outputs a first frequency band signal that is a low frequency band set from the sound signal output from the microphone 110.

The midpass filter 123 filters and outputs a second frequency band signal, which is a set intermediate frequency band, from the sound signal output from the microphone 110.

The high pass filter 125 filters and outputs a third frequency band signal, which is a set high frequency band signal, from the sound signal output from the microphone 110.

Here, the first to third frequency bands may be determined by dividing the audible frequency band into three sections. Preferably, the first frequency band is less than 5 KHz, the second frequency band is 5 KHz to 10 KHz, and the third frequency band is more than 10 K. Or 10KHz to 30KHz.

In addition, the low-pass filter 121, the mid-pass filter 123 and the high-pass filter 125 is formed so that the user can adjust the frequency range of the filtering band.

The first amplifier 131 amplifies and outputs the signal output from the low pass filter 121.

The second amplifier 133 amplifies and outputs the signal output from the midpass filter 123.

The third amplifier 135 amplifies and outputs the signal output from the high pass filter 125.

The first gain adjuster 132 is configured to adjust the amplification gain of the first amplifier 131 by a user.

The second gain adjuster 134 and the third gain adjuster 136 can also adjust the amplification gains of the corresponding second amplifier 133 and the third amplifier 135 by the user.

The gain adjusters 132, 134 and 136 give a function of adjusting the sum of colors according to their tastes when adjusting the brightness of the light source described later.

The first to third light sources 171, 172, and 173 are driven by the control of the control unit 140.

The first to third light sources 171, 172, and 173 emit light of different colors, and preferably emit red, green, and blue light, which are three primary colors of light, respectively. That is, the first light source 171 is red (R), the second light source 172 is green (G) and the third light source 173 is applied to the blue (B) light is emitted.

In addition, it is preferable that a light emitting diode is applied to the first to third light sources 171, 172, and 173.

The control unit 140 adjusts the luminance of each of the first to third light sources that are set to be matched one-to-one corresponding to the signal level output from the amplifiers 131, 133, and 135 for each of the first to third frequency bands. To control.

An example of the control unit 140 will be described with reference to FIG. 2.

The control unit includes first to third peak and level detectors 141, 143 and 145, first to third drivers 151 and 153 and 155, and first to third light source selection switches 161 ( 153 and 165.

The first peak and level detector 141 detects a peak of a signal output from the first amplifier 131 and outputs a level signal corresponding to the detected peak. The first peak and level detector 141 is configured to detect the peak value of the input signal during the set period and output a level signal corresponding to the detected peak.

The second peak and level detector 143 detects the peak of the signal output from the second amplifier 133 and outputs a level signal corresponding to the detected peak.

The third peak and level detector 145 detects a peak of the signal output from the third amplifier 135 and outputs a level signal corresponding to the detected peak.

The first driver 151 outputs driving power corresponding to the level output from the first peak and the level detector 141.

The second driver 153 outputs driving power corresponding to the level output from the second peak and level detector 143.

The third driver 155 outputs driving power corresponding to the level output from the third peak and the level detector.

As the driving method of the first to third driving units 151, 153, and 155, a phase power control method may be applied to the light sources 171, 172, and 173 operated by alternating current. In the case of the light sources 171, 172 and 173 that are operated, a method of adjusting the duty, which is the ratio of the driving-on time for the set period, by pulse width modulation is applied.

The first light source selection switch 161 is configured to selectively connect the output terminal of the first driver 151 with any one of the first to third light sources 171, 172, 173.

The second light source selection switch 163 is configured to selectively connect the output terminal of the second driver 153 to any one of the first to third light sources 171, 172, and 173.

The third light source selection switch 165 is configured to selectively connect the output terminal of the third driver 155 with any one of the first to third light sources 171, 172, and 173.

Here, the first to third light source selection switches 161 and 163 and 165 are applied as an example of the light source selection switch unit, and the matrix switch may be applied differently from the illustrated example.

In addition, unlike the illustrated example, the control unit 140 converts the signals output from the respective amplifiers 131, 133, and 135 into digital signals, calculates levels from the converted digital signals, and inputs an externally provided input unit. An operation key is provided through which a user can select light sources 171, 172 and 173 corresponding to each frequency band, and corresponding light sources 171 and 172 according to the light source selection information for each frequency band selected by the operation key. 173 may be formed in the form of a microprocessor.

On the other hand, the lighting device 100 is preferably arranged so that the light emitted from each light source 171 (173, 175) can be recognized as a mixed color to the viewer, an example thereof is shown in FIG. have.

Referring to FIG. 3, the housing 101 of the lighting apparatus has a structure having an opening that is open upward, and light sources 171, 172, 173 are disposed on the circuit board 103 in the interior space of the housing 101. It is mounted so that light can be emitted toward the opening.

In addition, the transparent cap 105 is installed to close the opening of the housing 101, and the inner surface facing the light sources 171, 172 and 173 is the first to third light sources 171 and 172. The concave-convex pattern 105a is formed to diffuse the light emitted from the circumference 173.

Therefore, since the light emitted from the light sources 171, 172, 173 is focused by the transparent cap 105 after being diffused by the uneven pattern 105a, the light sources 171, 172, 173 Good color mixing of the emitted light.

On the other hand, the shape of the housing 101 and the arrangement of the light sources 171, 172, 173 may be applied to a structure different from the illustrated example.

The lighting device 100 calculates a level of each sound signal input through the microphone 110 for each of the three divided bands, and emits light of different colors according to the calculated level for each band. Each of the driving units 172 and 173 may implement color light having various color sums according to the band-specific level of the sound signal.

As an example, when the red light source 171 is applied to the first frequency band, the green light source 172 is applied to the second frequency band, and the blue light source 173 is applied to the third frequency band, the microphone The level value for the first frequency band of the sound signal input through 110 corresponds to 30% duty, the level value for the second frequency band corresponds to 50% duty, and the level value for the third frequency band. When it corresponds to this 40% duty, the color light which consists of 30% of red, 50% of green, and 40% of blue is displayed. Similarly, the level value for the first frequency band of the sound signal input through the microphone 110 corresponds to 50% duty, the level value for the second frequency band corresponds to 60% duty, and to the third frequency band. When the level value corresponds to a 30% duty, the color sum is represented by color light consisting of red 50%, green 60%, and blue 34%. As described above, color light having a variety of color tones can be implemented according to a change in the level value of each sound region of the sound signal, thereby enabling a variety of atmospheres to be produced.

On the other hand, when the display is to be performed in a single color or a dual mixed color, only the display target light sources 71, 172, 173 need to be connected to the driving units 151, 153, 155.

1 is a block diagram showing a color light illuminating device responsive to sound according to the present invention;

2 is a view showing an example of the configuration of the control unit of FIG.

3 is a cross-sectional view illustrating an example of a lamp in which the first to third light sources of FIG. 1 are mounted.

Claims (6)

A microphone for converting the received sound signal into an electrical signal and outputting the converted sound signal; A multi-band pass filter unit which independently filters and outputs three first to third frequency bands differently set from the sound signal output from the microphone; First, second, and third light sources that emit light of mutually different colors; And a control unit for controlling the luminance of each of the first, second, and third light sources set to be matched one-to-one corresponding to the signal level of each of the first, second, and third frequency bands output from the multi-band pass filter unit. Color light illuminator responsive to the sound, characterized in that. The method of claim 1, wherein the multi-band pass filter unit A low pass filter for filtering the first frequency band signal, which is a low frequency band set from the sound signal output from the microphone; A mid-pass filter for passing a second frequency band signal, which is an intermediate frequency band set from the sound signal output from the microphone; A high pass filter for passing a third frequency band signal, which is a high frequency band signal set from the sound signal output from the microphone; A first amplifier for amplifying the signal output from the low pass filter; A second amplifier for amplifying the signal output from the midpass filter; And a third amplifier for amplifying the signal output from the high pass filter. 3. The color light illuminating apparatus according to claim 2, wherein the first light source is red, the second light source is green, and the third light source is blue light. The apparatus of claim 3, wherein each of the first to third amplifiers further includes a gain adjuster for adjusting an amplification gain. The method of claim 4, wherein the control unit A first peak and level detector detecting a peak of the signal output from the first amplifier and outputting a level signal corresponding to the detected peak; A second peak and level detector for detecting a peak of a signal output from the second amplifier and outputting a level signal corresponding to the detected peak; A third peak and level detector detecting a peak of the signal output from the third amplifier and outputting a level signal corresponding to the detected peak; A first driver for outputting driving power corresponding to the level output from the first peak and the level detector; A second driver for outputting driving power corresponding to a level output from the second peak and the level detector; A third driver for outputting driving power corresponding to the level output from the third peak and level detector; And a light source selection switch unit configured to selectively connect the output terminals of the first and third driving units with any one of the first and third light sources. Optical lighting device. The method of claim 5, wherein the first to the third light source is installed in a housing having an opening that is open upward, and has a transparent cap for closing the opening of the housing, wherein the inner surface of the transparent cap is the first to Color light illumination device responsive to sound, characterized in that the uneven pattern is formed so as to diffuse the light emitted from the third light source.

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