KR101483229B1 - Lighting system to control light color - Google Patents

Abstract

The present invention relates to a lighting device capable of adjusting the color through only two lines by supplying the polarities of the driving power supplied to the respective light emitting portions at the opposite polarities.

The color adjusting illumination device according to the present invention includes: first and second driving power supply units for generating first and second driving power supplies having opposite polarities; Switching means for selecting one of the first and second driving power from the first and second driving power supplies; A switching control unit connected to the switching unit and controlling the switching unit to select one of the first and second driving power supplies; A first light emitting unit emitting light by the first driving power source; And a second light emitting unit that emits light by the second driving power source. Thus, various colors desired by the user can be produced, and a line for supplying driving power is reduced, thereby reducing the size of the lighting apparatus.

Color coordinates, color temperature, lighting device, switching control, light emitting device, LED, color control

Description

Background of the Invention [0001] Lighting system to control light color [

[0001] The present invention relates to a color-adjusting lighting apparatus, and more particularly, to a color-adjusting lighting apparatus which performs switching control of first and second driving power supply units for supplying driving power to light- The present invention relates to a color adjusting lighting device capable of reducing a size of a device by reducing wiring lines for supplying driving power.

Generally, an illumination device capable of changing the color or luminance is used for adjusting the interior and atmosphere of a room. Such an indoor lighting device is a device that adjusts the intensity of light by connecting a variable resistor to an incandescent lamp or a fluorescent lamp to regulate a current supplied to the lamp.

2. Description of the Related Art In recent years, studies have been actively conducted on LED lighting devices using LEDs as light emitting devices in an illumination device using incandescent lamps or fluorescent lamps by LEDs emitting light of various colors. Since the LED lighting apparatus emits light of three primary colors of red, green, and blue, it is possible to reproduce all the colors recognizable by the human eye by controlling them, and the frequency of use thereof is gradually increasing.

Hereinafter, the illumination device according to the related art will be described in more detail with reference to the related drawings.

1 is a block diagram of a lighting device according to the prior art.

First, as shown in FIG. 1, a conventional lighting apparatus includes a first driving power supply unit 10, a second driving power supply unit 20, and first and second LEDs D1 and D2.

Here, the first and second driving power supplies 10 and 20 may include first and second driving power sources F1 and F2 for causing the first and second LEDs D1 and D2 to emit light, And supplies the first and second LEDs D1 and D2 to the second LEDs D1 and D2 so that the first and second LEDs D1 and D2 emit light by the first and second driving power sources F1 and F2.

The anode of the first LED D1 is connected to the positive terminal of the first driving power supply unit 10 and the cathode of the first LED D1 is grounded to supply the first driving power to the first driving power supply unit 10. [ And the luminance can be changed according to the magnitude of the voltage or current of the first driving power source F1.

The second LED D2 is connected to the positive terminal of the second driving power supply unit 20 and the cathode of the second driving power supply unit 20 is grounded, (F2). The second LED (D2) can also change the brightness according to the magnitude of the voltage or current of the second driving power source (F2).

Particularly, the first and second LEDs D1 and D2 are configured using any one of a single-color LED and a white LED selected from among red, green and blue. That is, when the user desires to produce bright blue light, the first LED D1 is selected as a blue LED, the second LED D2 is selected as a white LED, and then the first and second driving power supplies 10, 20 and the first and second driving power sources F1 and F2, respectively, to produce bright blue light.

Accordingly, the illumination device according to the related art has the first and second driving power supply units 10 and 20 to control the two lights, i.e., the first and second LEDs D1 and D2, respectively, Can produce light having.

However, the conventional LED lighting apparatus has the following problems.

The LED lighting apparatus according to the prior art has the first and second LEDs D1 and D2, which are two lights, for supplying the first and second driving power sources F1 and F2, respectively, First and second lines L1 and L2 for connecting the second driving power supply unit and the first and second LEDs D1 and D2 respectively and grounding the first and second LEDs D1 and D2, A total of three lines L1, L2, and L3 of the third line L3 are required.

However, in a general lighting device, only two lines are used for the driving wiring, and the wiring is also standardized to use only two lines. In order to use the LED lighting device according to the related art, There is a problem that the size of the LED illumination device is increased and the material cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and it is an object of the present invention to provide a light emitting device which repeatedly controls the first and second driving power supply parts for supplying driving power to light emitting parts, And it is an object of the present invention to provide a color adjusting lighting device which can reduce the size of a device by reducing the number of lines for supplying driving power.

According to an aspect of the present invention, there is provided a color adjusting lighting apparatus including first and second driving power supply units for generating first and second driving power supplies having opposite polarities; Switching means for selecting one of the first and second driving power from the first and second driving power supplies; A switching control unit connected to the switching unit and controlling the switching unit to select one of the first and second driving power supplies; A first light emitting unit emitting light by the first driving power source; And a second light emitting unit that emits light by the second driving power source. Thus, various colors desired by the user can be produced, and a line for supplying driving power is reduced, thereby reducing the size of the lighting apparatus.

Here, the first and second light emitting units may include at least one light emitting unit, the light emitting unit of the first light emitting unit may include an anode connected to the switching unit and a cathode grounded, Characterized in that the anode is grounded and the cathode is connected to the switching means. The light emitting units of the first and second light emitting units use LEDs.

The first light emitting unit and the second light emitting unit may emit light of different colors and may emit light of various colors.

The switching control unit may control the switching unit to repeatedly select and control the first and second driving power sources. The switching control unit may control the first and second driving power sources according to a control method selected from PWM, PAM, or PFM And controls the switching means.

According to another aspect of the present invention, there is provided a color adjusting lighting apparatus including first and second driving power supply units for generating first and second driving power supplies having opposite polarities; The first and second driving power supply units are connected to the first and second driving power supply units and control the first and second driving power supply units to supply first and second control signals for selecting one of the first and second driving power supplies A switching control unit for outputting the switching control signal; A first light emitting unit emitting light by the first driving power source; And a second light emitting unit emitting light by the second driving power source.

In this case, the first and second light emitting units may include one or more light emitting units. The light emitting unit of the first light emitting unit may include a plurality of light emitting units, each of which includes an anode connected to the first and second driving power supply units, The light emitting means of the second light emitting portion is characterized in that an anode is grounded and a cathode is connected to the first and second driving power supply portions, and the light emitting means of the first and second light emitting portions use LEDs.

The first light emitting unit and the second light emitting unit may emit light of different colors and may emit light of various colors.

The switching control unit repeatedly selects and controls each of the first and second driving power supplies by controlling the first and second driving power supply units. The switching control unit may control the switching power supply unit such that any one of PWM, PAM, and PFM The control unit controls the first and second driving power supply units.

The color adjusting lighting apparatus according to the present invention is characterized in that the first and second driving power supply units for supplying driving power to light emitting units which emit light of different colors are controlled at a high speed to rapidly supply driving power to the light emitting unit The present invention relates to a color adjusting lighting device capable of reducing a size of a device by reducing a line for supplying a driving power.

The specific structure of the color adjusting lighting apparatus according to the present invention and the effect thereof will be clearly understood by the following detailed description with reference to the drawings showing the first and second preferred embodiments of the present invention.

Example  One

Hereinafter, the color adjusting lighting device according to the first embodiment of the present invention will be described in detail with reference to the related drawings.

FIG. 2 is a block diagram of the color adjusting lighting apparatus according to the first embodiment of the present invention, FIGS. 3A and 3B are timing charts showing control signals of the lighting apparatus of FIG. 2, Is a block diagram showing a modification of the light emitting unit of the color adjusting lighting apparatus according to the first embodiment of the present invention.

2, the color adjusting lighting device according to the first embodiment of the present invention includes first and second driving power supply units 210 and 220 having opposite polarities, a switching control unit 230, The first and second light emitting units 240 and 250 including the switching unit SW and the first and second light emitting units 240 and 250 can control the user to produce the desired color light.

Here, the first driving power supply unit 210 has a negative terminal (-) grounded, a positive terminal (+) connected to the switching unit (SW), and a first And generates and outputs driving power F1.

In addition, the second driving power supply unit 220 is connected to the negative terminal (-) of the first driving power supply unit 210 and the negative terminal (-) is connected to the switching unit SW And generates and outputs a second driving power source F2 for causing the second light emitting unit 250 to emit light.

The switching means SW has one end selectively connected to either the positive terminal of the first driving power supply unit 210 or the negative terminal of the second driving power supply unit 220, The first or second driving power supply unit 210 is connected to a contact point of the second light emitting unit 240 or 250 and is selectively controlled by the switching control unit 230 to selectively connect the first or second driving power supply unit 210. [ The first or second light emitting unit 240 or 250 may transmit the first or second driving power F2 outputted from the driving power supply unit 210 to the first or second light emitting unit 240 or 250, The light emitting unit emits light.

The switching control unit 230 is connected to the switching unit SW and transmits a control signal S for controlling the switching unit SW to the switching unit SW so that one end of the switching unit SW The first and second driving power supplies 210 and 220 are connected to one of the first and second driving power supplies 210 and 220 to supply the selected driving power to the first and second light emitting units 240 and 250.

In particular, the switching control unit 230 may be configured such that the control signal S is set by a user, and that the switching unit SW may be controlled by any one of the first and second driving power supplies 210 and 220 The first and second light emitting units 240 and 250 are repeatedly connected to the first and second driving power supply units 210 and 220 so as to repeatedly emit light.

At this time, the switching controller 230 controls the selection time of the first or second driving power supply units 210 and 220. That is, by repeating the selection times of the first or second driving power supply units 210 and 220 more than 20 times per second, the first and second light emitting units 240 and 250 are turned on and off to the eyes of a person It is possible to reduce the eye fatigue of the user by controlling so as to detect that the light is not detected but continuously lit.

The switching controller 230 may control the switching unit SW using any one of a PWM (Pulse Width Modulation), a PAM (Pulse Amplitude Modulation), and a PFM (Pulse Frequency Modulation) .

The first light emitting unit 240 includes one first light emitting unit D1. The first light emitting unit D1 has an anode connected to the other end of the switching unit SW, a cathode connected to the ground, 1 driving power supply unit 210 and emits light by the first driving power supply F1 having a positive voltage.

The second light emitting unit 250 includes one second light emitting unit D2. The second light emitting unit D2 has an anode connected to the cathode of the first light emitting unit D1, And a second driving power source F2 connected to the other end of the switching unit SW and having a negative voltage output from the second driving power supply unit 220 emits light.

Here, the first and second light emitting units D1 and D2 are light emitting devices that emit light of different colors, and the LEDs are used as the light emitting unit. The first and second light emitting units 240 and 250 The light emitting device is composed of any one of a monochromatic LED emitting red, green or blue light and a white LED emitting white light, and emits light of various colors discriminated by human eyes.

For example, when the user desires to produce red light mixed with blue light, the first light emitting means D1 is selected as a red LED and the second light emitting means D2 is selected as a blue LED, A 'of the first driving power supply unit 210 is increased in the switching control unit 230 as shown in FIG. 3A, and the first and second light emitting units 240 and 250 are formed. And outputs a control signal S for decreasing the selection time 'B' of the first and second driving power supply units 220 and 220 '. Then, the supply time of the first driving power source F1 is increased by the control signal S than the supply time of the second driving power source F2, so that the light emitting time of the first light emitting unit 240 is increased The light emission time of the second light emitting means 250 is reduced, so that the light output from the illumination device can produce a red light in which blue light is finely mixed. At this time, the switching unit SW is connected to the first driving power supply unit 210 in the 'A' period in which the control signal S is at a high level, and is connected to the first driving power supply unit 210 in the 'B' And is connected to the second driving power supply unit 220.

When it is desired to produce bright green light, the first light emitting unit D1 is selected as a green LED, the second light emitting unit D2 is selected as a white LED, and the first and second light emitting units 240, A 'of the first driving power supply unit 210 and a selection time of the second driving power supply unit 220 as shown in FIG. 3B in the switching control unit 230, And outputs a control signal S for increasing 'B'. The supply time of the second driving power source F2 is increased by the control signal S more than the supply time of the first driving power source F1 so that the light emitting time of the second light emitting means 250 is increased As the light emission time of the first light emitting means 240 is reduced, the light emitted from the illumination device can produce bright green light.

4, by selectively supplying the first and second driving power sources F1 and F2 to the first and second light emitting units 240 and 250 by the above-described method, (L 1, L 2, L 3) are required to turn on the two first and second LEDs (D 1, D 2) in the conventional lighting apparatus. The polarities of the first and second driving power supply units 210 and 220 are reversed and selectively controlled by the switching means SW so that only the first and second lines L1 and L2 are turned on, 2 light emitting units 240 and 250 can be easily emitted, the size of the lighting apparatus can be reduced and the material cost can be reduced.

5, which is a modification of the first and second light emitting units 240 and 250 of the lighting apparatus according to the first embodiment of the present invention, the first and second light emitting units 240 and 250 D12, D13, D21, D22, and D22 may be configured in series to enable color display in a wide range.

Example  2

Hereinafter, the color adjusting lighting device according to the first embodiment of the present invention will be described in detail with reference to the related drawings.

6 is a block diagram of a color-adjusting illumination device according to a second embodiment of the present invention.

6, the first and second driving power supplies 310 and 310 for supplying the first and second driving power sources F1 and F2, respectively, A switching control unit 330 for controlling the first and second driving power supply units 310 and 320 and first and second light emitting units 340 and 350.

Here, the first driving power supply 310 has a negative terminal connected to the negative terminal of the first driving power supply 310 and a positive terminal connected to the contacts of the first and second emitting units 340 and 350, And generates a first driving power F1 for driving the first light emitting unit 340 to emit light.

The second driving power supply unit 320 is connected to the negative terminal of the first driving power supply unit 310 and the negative terminal of the second driving power supply unit 310, And generates a second driving power F2 for driving the second light emitting unit 350 to supply the second driving power F2 to the second light emitting unit 350. [

The switching controller 330 is connected to the first and second driving power supply units 310 and 320 and includes first and second driving power supply units 310 and 320 for controlling the first and second driving power supply units 310 and 320, The first and second light emitting units 340 and 320 are turned off by transmitting control signals S1 and S2 to cut off the driving power supplied from the driving power supplying unit of either the first or second driving power supplying unit 310 or 320, , 350 can be selectively made to emit light.

For example, when the switching controller 330 increases the light emission time of the first light emitting unit 340 and decreases the light emitting time of the second light emitting unit 350, the switching control unit 330 may turn on the first control signal S1 Increases the output of the first driving power source F1 generated from the first driving power supply unit 310 by decreasing the ON period of the second control signal S2 to increase the output of the first light emitting unit 340 There is an effect that the time can be increased.

Accordingly, in the illumination device according to the second embodiment of the present invention, the switching controller 330 controls the first and second driving power supplies 310 and 320 to control the first and second driving power F1, The first and second light emitting units 340 and 350 can emit the desired color according to the emission of the first and second light emitting units 340 and 350 by repeatedly supplying and blocking the first and second light emitting units 340 and 350. [ There is an advantage in that the size of the lighting apparatus can be reduced by using only the two first and second lines L1 and L2 for emitting light.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. And such substitutions, changes, and the like should be considered to fall within the scope of the following claims.

1 is a block diagram of a prior art illumination device;

2 is a block diagram of a color-conditioning lighting apparatus according to a first embodiment of the present invention;

Figs. 3A and 3B are timing diagrams showing control signals of the lighting apparatus of Fig. 2; Fig.

4 is a graph showing the color coordinates.

FIG. 5 is a block diagram showing a modification of the light emitting portion of the color adjusting illumination device according to the first embodiment of the present invention. FIG.

6 is a block diagram of a color-conditioning lighting apparatus according to a second embodiment of the present invention;

Description of the Related Art

210: first driving power supply unit 220: second driving power supply unit

230: switching control unit 240: first light emitting unit

250: second light emitting portion SW: switching means

D1, D2: first and second light emitting means S1, S2: first and second control signals

L1 to L3: first to third lines

Claims (16)

First and second driving power supplies for generating first and second driving power sources having opposite polarities; Switching means for selecting one of the first and second driving power from the first and second driving power supplies; A switching control unit connected to the switching unit and controlling the switching unit to select one of the first and second driving power supplies; A first light emitting portion emitting light by the first driving power source, the anode including at least one LED connected to the switching means; And A second light emitting portion emitting light by the second driving power source, the cathode including at least one LED connected to the switching means; And a color-modulating device. delete delete delete delete delete The method according to claim 1, Wherein the switching controller controls the switching means to repeatedly select and control the first and second driving power sources. 8. The method of claim 7, Wherein the switching control unit controls the switching unit through any one of a PWM, a PAM, and a PFM control method. First and second driving power supplies for generating first and second driving power sources having opposite polarities; The first and second driving power supply units are connected to the first and second driving power supply units and control the first and second driving power supply units to supply first and second control signals for selecting one of the first and second driving power supplies A switching control unit for outputting the switching control signal; A first light emitting unit emitting light by the first driving power source and including at least one LED whose anode is connected to the first and second driving power supply units; And A second light emitting portion emitting light by the second driving power source and including a cathode connected to the first and second driving power supply portions; And a color-modulating device. delete 10. The method of claim 1 or 9, And the cathode of the LED of the first light emitting portion is grounded. 10. The method of claim 1 or 9, And the anode of the LED of the second light emitting portion is grounded. delete 10. The method of claim 1 or 9, Wherein the first light emitting unit and the second light emitting unit are formed of LEDs emitting light of different colors. 10. The method of claim 9, Wherein the switching controller controls the first and second driving power supplies to repeatedly select and control each of the first and second driving power supplies. 16. The method of claim 15, Wherein the switching controller controls the first and second driving power supplies through any one of PWM, PAM, and PFM control methods.

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