JP2017157507A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination device that can make communication using light and give a high color rendering.SOLUTION: An illumination device comprises a first light-emitting element, a second light-emitting element, a third light-emitting element, a fourth light-emitting element, a first control unit 2a, and a second control unit 2b. The first control unit 2a changes at least any one light among a red light radiated by the first light-emitting element, a green light radiated by the second light-emitting element, and a blue light radiated by the third light-emitting element, and thereby transmits particular information. The second control unit 2b adjusts a white light radiated by the fourth light-emitting element.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lighting device.

  Patent Document 1 describes a system for performing communication using light. The system described in Patent Document 1 includes an LED as a light source. For example, the system includes at least two LEDs, a red LED, a green LED, and a blue LED, and performs communication by changing the color of light.

International Publication No. 2016/001972

  White light can be obtained by using three color (RGB) LEDs, ie, a red LED, a green LED and a blue LED. However, white light obtained using red, green, and blue LEDs has low color rendering. For this reason, in the system described in patent document 1, even if it provided three-color LED as a light source, sufficient color rendering property was not able to be obtained. When the system described in Patent Document 1 is used for illumination, the color of the irradiated object cannot be reproduced with high accuracy.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide an illuminating device capable of realizing communication using light and obtaining high color rendering properties.

  The illumination device according to the present invention includes a first light emitting element that emits red light, a second light emitting element that emits green light, a third light emitting element that emits blue light, and a red light emitted from the first light emitting element. A first control means for transmitting specific information by changing at least one of light, green light emitted from the second light emitting element, and blue light emitted from the third light emitting element; and white light And a second control means for adjusting white light emitted from the fourth light emitting element.

  The illumination device according to the present invention includes a first light emitting element that emits red light toward a specific area, a second light emitting element that emits green light toward the area, and a first light emitting element that emits blue light toward the area. By changing at least one of the three light emitting elements and the red light emitted from the first light emitting element, the green light emitted from the second light emitting element, and the blue light emitted from the third light emitting element, 1st control means which transmits specific information, 4th light emitting element which radiates | emits white light toward an area | region, and 2nd control means which adjusts white light radiated | emitted from a 4th light emitting element are provided.

  The lighting device according to the present invention includes, for example, a first light emitting element, a second light emitting element, a third light emitting element, and a fourth light emitting element. The fourth light emitting element emits white light. In addition, by changing at least one of red light emitted from the first light emitting element, green light emitted from the second light emitting element, and blue light emitted from the third light emitting element, the specific information is changed. Is sent. If it is an illuminating device which concerns on this invention, while using the light, the high color rendering property can be acquired while being able to implement | achieve communication.

It is a figure which shows the example of the illuminating device in Embodiment 1 of this invention. It is a figure which shows the example of a lighting fixture and a control unit. It is a figure which shows the example of the light of 3 colors (RGB) radiated | emitted from a lighting fixture. It is a figure which shows the example of the white light radiated | emitted from a lighting fixture. It is a figure which shows the example of the whole light radiated | emitted from a lighting fixture. It is the figure which looked at the lighting fixture from the B direction shown in FIG. It is a figure which shows CC cross section of FIG. It is a figure which shows the other example of a lighting fixture. It is a figure which shows the example of a connection of LED. It is a figure which shows the other example of a lighting fixture. It is a figure which shows the DD cross section of FIG. It is a figure which shows the other example of a lighting fixture. It is a figure which shows the other example of the illuminating device in Embodiment 1 of this invention. It is the figure which looked at the lighting fixture from the E direction shown in FIG. It is a figure which shows the example of the illuminating device in Embodiment 2 of this invention. It is a figure which shows the FF cross section of FIG. It is a figure which shows the other example of the illuminating device in Embodiment 2 of this invention. It is a figure which shows the other example of the illuminating device in Embodiment 2 of this invention. It is a figure which shows the other example of the illuminating device in Embodiment 2 of this invention. It is a figure which shows the cross section of an illuminating device.

  The present invention will be described with reference to the accompanying drawings. The overlapping description will be simplified or omitted as appropriate. In each figure, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 is a diagram showing an example of a lighting apparatus according to Embodiment 1 of the present invention. The lighting device includes, for example, a lighting fixture 1 and a control unit 2. The control unit 2 includes a first control unit 2a and a second control unit 2b.

  The luminaire 1 emits light. For example, the luminaire 1 emits light to illuminate a specific object. The luminaire 1 may emit light toward a specific space. FIG. 1 shows an example in which a luminaire 1 is used to illuminate a fence 3. The light emitted from the luminaire 1 strikes the ridge 3. A part of the light hitting 鞄 3 is reflected by 鞄 3. In FIG. 1, the light toward the mobile terminal 4 among the light from the lighting fixture 1 reflected by the ridge 3 is indicated by an arrow A.

  FIG. 2 is a diagram illustrating an example of the lighting fixture 1 and the control unit 2. The lighting fixture 1 includes, for example, a plurality of LEDs (Light Emitting Diode). In the example illustrated in FIG. 2, the lighting fixture 1 includes a plurality of red LEDs 5, a plurality of green LEDs 6, and a plurality of blue LEDs 7. The red LED 5 emits red light toward a specific area. The green LED 6 emits green light toward the specific area. The blue LED 7 emits blue light toward the specific region. In the example shown in FIG. 1, the basket 3 is placed in the specific area.

  FIG. 2 shows an example in which a plurality of red LEDs 5 are connected in series. The red LEDs 5 may be connected in parallel. The luminaire 1 may have only one red LED 5. FIG. 2 shows an example in which a plurality of green LEDs 6 are connected in series. The green LEDs 6 may be connected in parallel. The luminaire 1 may have only one green LED 6. FIG. 2 shows an example in which a plurality of blue LEDs 7 are connected in series. The blue LEDs 7 may be connected in parallel. The luminaire 1 may have only one blue LED 7.

  FIG. 3 is a diagram illustrating an example of light of three colors (RGB) emitted from the lighting fixture 1. That is, FIG. 3 shows an example of red light emitted from the red LED 5, green light emitted from the green LED 6, and blue light emitted from the blue LED 7. FIG. 3 shows a spectrum of RGB light having a color temperature of about 5000K. The index Ra of the spectrum shown in FIG. Ra is a color rendering index (average color rendering index) indicating color reproducibility. FIG. 3 shows that the RGB light from the luminaire 1 alone is not suitable for illumination.

  The 1st control part 2a controls red LED5, green LED6, and blue LED7. For example, the first control unit 2a emits RGB light from the lighting fixture 1. The first control unit 2a emits red light from the red LED 5, for example. The first controller 2a emits green light from the green LED 6. The first control unit 2 a emits blue light from the blue LED 7. The first control unit 2a can individually control the red LED 5, the green LED 6, and the blue LED 7.

  The first control unit 2 a adjusts the RGB light emitted from the lighting fixture 1. “Adjusting light” includes, for example, changing the intensity of light. “Adjusting light” includes, for example, changing the color of the light. Any method of adjusting the light may be adopted. For example, amplitude control may be employed to adjust the RGB light emitted from the luminaire 1. In amplitude control, the brightness is adjusted by controlling the direct current of the LED. Also, PWM (Pulse Width Modulation) control may be employed to adjust the RGB light emitted from the lighting fixture 1. In PWM control, the LED is turned on and off at a constant frequency, and the brightness is adjusted by controlling the ratio of this on time. The first control unit 2a adjusts red light emitted from the red LED 5, for example. The first controller 2a adjusts the green light emitted from the green LED 6. The first controller 2a adjusts the blue light emitted from the blue LED 7. The first controller 2a can individually adjust the red light emitted from the red LED 5, the green light emitted from the green LED 6, and the blue light emitted from the blue LED 7.

  The first control unit 2 a transmits specific information from the lighting fixture 1. The 1st control part 2a transmits identification information from the lighting fixture 1, for example. The identification information is information for specifying the luminaire 1. Unique identification information is assigned to the luminaire 1 in advance. The first control unit 2a changes the intensity of the red light emitted from the red LED 5, the green light emitted from the green LED 6, and the blue light emitted from the blue LED 7 to change the identification information from the lighting fixture 1, for example. Send it.

  Any method may be used for changing the light in order to transmit the identification information from the lighting fixture 1. For example, the first control unit 2a changes one color light or two color light among red light emitted from the red LED 5, green light emitted from the green LED 6, and blue light emitted from the blue LED 7. Thus, the identification information may be transmitted from the luminaire 1. The 1st control part 2a may transmit identification information from the lighting fixture 1 by changing the strength of RGB light, maintaining the control conditions as illumination of the light radiated | emitted from the lighting fixture 1. FIG. The “control condition as illumination” is, for example, at least one of dimming degree, light color, or color temperature. For example, the first control unit 2a changes the brightness of the RGB light minutely while keeping the color temperature of the light emitted from the lighting fixture 1 at a certain reference value (or reference range). Send identification information. The “control condition as illumination” may be a light beam. For example, the 1st control part 2a discriminate | determines from the lighting fixture 1 by carrying out the microfluctuation of the brightness of RGB light, keeping the light beam radiated | emitted from the lighting fixture 1 to a certain reference value (or reference range). Information may be transmitted. Various visible light communication techniques can be applied to the transmission of the identification information.

  Moreover, in the example shown in FIG. 2, the lighting fixture 1 is provided with several white LED8 in addition to red LED5, green LED6, and blue LED7. The white LED 8 is provided because the red LED 5, the green LED 6, and the blue LED 7 alone cannot provide sufficient color rendering for illumination. The white LED 8 emits white light toward the specific area. In the example illustrated in FIG. 1, red light from the red LED 5, green light from the green LED 6, and blue light from the blue LED 7 are emitted toward the region where the white light from the white LED 8 is emitted. That is, in the example shown in FIG. 1, white light emitted from the white LED 8 hits the ridge 3. FIG. 2 shows an example in which a plurality of white LEDs 8 are connected in series. The white LEDs 8 may be connected in parallel. The luminaire 1 may have only one white LED 8.

  FIG. 4 is a diagram illustrating an example of white light emitted from the lighting fixture 1. That is, FIG. 4 shows an example of white light emitted from the white LED 8. FIG. 4 shows a spectrum of white light having a color temperature of about 4000K. The index Ra of the spectrum shown in FIG. FIG. 4 shows that the white LED 8 alone has sufficient color rendering for illumination.

  The second control unit 2b controls the white LED 8. The second control unit 2b emits white light from the white LED 8, for example. Further, the second control unit 2b adjusts the white light emitted from the white LED 8. The white LED 8 is for illumination and is not used for visible light communication. That is, information such as identification information is not transmitted using the white LED 8.

  The control unit 2 may include, for example, a controller and a power supply device (both not shown). The controller controls the power supply device. Control of the lighting fixture 1 is performed by a controller controlling a power supply device. The controller and the power supply device may exist as independent devices and may be connected by a signal line. The controller and the power supply device may be an integrated device.

  FIG. 5 is a diagram illustrating an example of the entire light emitted from the lighting fixture 1. That is, FIG. 5 shows a spectrum obtained by mixing the spectrum shown in FIG. 3 and the spectrum shown in FIG. FIG. 5 shows an example in which the radiant flux of RGB light emitted from the luminaire 1 is about 5% of the total radiant flux of light. The radiant flux of the RGB light is a radiant flux of red light emitted from the red LED 5, green light emitted from the green LED 6, and blue light emitted from the blue LED 7. Further, the radiant flux of the whole light is a radiant flux of red light emitted from the red LED 5, green light emitted from the green LED 6, blue light emitted from the blue LED 7, and white light emitted from the white LED 8. is there. The color temperature of the spectrum shown in FIG. 5 shifts only about + 40K from the color temperature of the spectrum shown in FIG. The index Ra of the spectrum shown in FIG. That is, the spectrum index Ra shown in FIG. 5 is higher than the spectrum index Ra shown in FIG. FIG. 5 shows that the use of the luminaire 1 is suitable for illumination.

  With this lighting device, communication using light can be realized and high color rendering can be obtained. It is desirable that the radiant flux of communication light is up to about 10% of the total radiant flux of light. If the radiant flux of RGB light emitted from the luminaire 1 is 5% to 10% of the radiant flux of the entire light, communication utilizing light can be realized and high color rendering can be reliably obtained. Further, the shift amount of the color temperature can be kept at a level where there is no problem in practical use. Specific calculation results are shown in Table 1 below. Detailed data necessary for obtaining the results of Table 1 are shown in Table 2 below.

  The information transmitted from the lighting fixture 1 is received by the portable terminal 4, for example. The portable terminal 4 can identify the lighting fixture 1 that has transmitted the identification information, for example, by analyzing the received identification information. The portable terminal 4 may transmit control information to the control unit 2 that controls the luminaire 1 that has transmitted the identification information. For example, the control unit 2 controls the luminaire 1 based on the control information received from the mobile terminal 4. The control unit 2 may control only the white LED 8 based on the identification information received from the mobile terminal 4.

  Next, a specific example of the lighting fixture 1 will be described. FIG. 6 is a view of the luminaire 1 seen from the direction B shown in FIG. FIG. 7 is a diagram showing a CC cross section of FIG. The lighting fixture 1 includes a substrate 9, a case 10, a lens 21, and a cover 11 in addition to the red LED 5, the green LED 6, the blue LED 7, and the white LED 8.

  The luminaire 1 is one device that includes a red LED 5, a green LED 6, a blue LED 7, and a white LED 8. The red LED 5, the green LED 6, the blue LED 7 and the white LED 8 are provided on one substrate 9, for example. The red LED 5, the green LED 6, the blue LED 7, the white LED 8, the lens 21 and the substrate 9 are supported by the case 10. 6 and 7 show an example in which the case 10 has a cylindrical shape. The case 10 is disposed so as to surround the red LED 5, the green LED 6, the blue LED 7, the white LED 8, the lens 21 and the substrate 9.

  The cover 11 is provided on the case 10, for example. The cover 11 is disposed so as to close the opening of the case 10. The cover 11 is disposed so as to face the red LED 5, the green LED 6, the blue LED 7, and the white LED 8. The red light emitted from the red LED 5 passes through the cover 11 and strikes the ridge 3. Similarly, the green light emitted from the green LED 6 passes through the cover 11 and strikes the ridge 3. Blue light emitted from the blue LED 7 passes through the cover 11 and strikes the ridge 3. White light emitted from the white LED 8 passes through the cover 11 and strikes the ridge 3. In the example shown in FIGS. 6 and 7, light from each LED provided in the lighting fixture 1 passes through one cover 11.

  It is desirable that the LEDs provided in the luminaire 1 are regularly arranged. FIG. 6 shows an example in which one red LED 5, one green LED 6, one blue LED 7 and 18 white LEDs 8 are regularly arranged. In the example shown in FIG. 6, one white LED 8 is arranged at the center. Around the central white LED 8, six LEDs, that is, a red LED 5, a green LED 6, a blue LED 7, and three white LEDs 8 are arranged in a circle. Further, 14 white LEDs 8 are arranged in a circle on the outside thereof. In the example shown in FIG. 6, the LEDs adjacent to the red LED 5 are all white LEDs 8. All the LEDs adjacent to the green LED 6 are white LEDs 8. All the LEDs adjacent to the blue LED 7 are white LEDs 8.

  As in the example illustrated in FIG. 6, the red LED 5, the green LED 6, and the blue LED 7 are desirably not arranged on the outermost side. In the example shown in FIG. 6, the white LED 8 is arranged on the outermost side. By disposing the white LED 8 on the outermost side, the red light from the red LED 5, the green light from the green LED 6, and the blue light from the blue LED 7 are buried in the white light from the white LED 8, and can be made inconspicuous.

  FIG. 8 is a diagram illustrating another example of the lighting fixture 1. FIG. 8 is a view of the luminaire 1 seen from the direction B shown in FIG. FIG. 9 is a diagram illustrating a connection example of LEDs. FIG. 8 shows an example in which one red LED 5, one green LED 6, one blue LED 7, and 18 white LEDs 8 are arranged as in FIG. 6. In the example shown in FIG. 8, one white LED 8 is arranged at the center. Six white LEDs 8 are arranged in a circle around the central white LED 8. Further, a red LED 5, a green LED 6, a blue LED 7, and eleven white LEDs 8 are arranged in a circle on the outside.

  For example, consider a case where an existing lighting fixture in which 21 white LEDs are connected in series is changed to the lighting fixture 1 having the above configuration. As shown in FIG. 9, among the 21 white LEDs connected in series, three white LEDs connected to the end are changed to a red LED 5, a green LED 6 and a blue LED 7. Also, as shown in FIG. 9, the substrate pattern is cut and the lead wires are drawn out. By such a simple procedure, the existing lighting fixture can be changed to the lighting fixture 1 of the said structure. Also, a substrate pattern as shown in FIG. 9 may be constructed in advance, and the red LED 5, green LED 6, blue LED 7 and white LED 8 may be arranged as shown in FIG.

  FIG. 10 is a diagram illustrating another example of the lighting fixture 1. FIG. 10 is a view of the luminaire 1 seen from the direction B shown in FIG. FIG. 11 is a diagram showing a DD cross section of FIG. 10. The lighting fixture 1 includes a first substrate 12, a second substrate 13, a first case 14, a second case 15, and a cover 16 in addition to the red LED 5, the green LED 6, the blue LED 7, the white LED 8, and the lens 21.

  The white LED 8 is provided on the first substrate 12. In the example shown in FIGS. 10 and 11, 21 white LEDs 8 are provided on the first substrate 12. The red LED 5, the green LED 6 and the blue LED 7 are provided on the second substrate 13. The white LED 8 and the first substrate 12 are supported by the first case 14. 10 and 11 show an example in which the first case 14 has a cylindrical shape. The first case 14 is disposed so as to surround the white LED 8 and the first substrate 12. The cover 16 is provided on the first case 14, for example. The cover 16 is disposed so as to close the opening of the first case 14.

  The red LED 5, the green LED 6, the blue LED 7 and the second substrate 13 are supported by the second case 15. The second case 15 is arranged so as to surround the red LED 5, the green LED 6, the blue LED 7, and the second substrate 13. The second case 15 is provided in the first case 14. FIG. 11 shows an example in which the second case 15 is arranged inside the first case 14. The second case 15 is disposed in a space defined by the first case 14 and the cover 16.

  In the example shown in FIG. 11, the second case 15 is disposed between the first substrate 12 and the cover 16. For this reason, a part of the light from the white LED 8 is blocked by the second case 15. The red LED 5, the green LED 6 and the blue LED 7 are arranged so as to block a part of the light from the white LED 8.

  The cover 16 is disposed so as to face the red LED 5, the green LED 6, the blue LED 7, and a part of the white LEDs 8. The red light emitted from the red LED 5 passes through the cover 16 and strikes the ridge 3. Similarly, the green light emitted from the green LED 6 passes through the cover 16 and hits the ridge 3. The blue light emitted from the blue LED 7 passes through the cover 16 and strikes the ridge 3. White light emitted from some white LEDs 8 passes through the cover 16 and strikes the ridge 3. 10 and 11 show an example in which the red LED 5, the green LED 6, the blue LED 7, the second substrate 13 and the second case 15 are added to an existing lighting fixture to obtain the lighting fixture 1 having the above configuration.

  FIG. 12 is a diagram illustrating another example of the lighting fixture 1. FIG. 12 is a diagram corresponding to the DD cross section of FIG. 10. The example shown in FIG. 12 is different from the luminaire 1 shown in FIG. 11 in that the second case 15 is disposed outside the cover 16. Also in the example shown in FIG. 12, the second case 15 is provided in the first case 14. Further, part of the light from the white LED 8 is blocked by the second case 15. That is, the red LED 5, the green LED 6, and the blue LED 7 are arranged so as to block a part of the light from the white LED 8. As shown in FIG. 12, the lighting fixture 1 may further include a second cover 17 that closes the opening of the second case 15.

  FIG. 13 is a diagram showing another example of the illumination device according to Embodiment 1 of the present invention. FIG. 13 is an exploded perspective view of the lighting device. FIG. 13 shows an embedded installation type lighting device. FIG. 14 is a view of the luminaire 1 seen from the direction E shown in FIG. The lighting device shown in FIGS. 13 and 14 includes a lighting fixture 1, a control unit 2, and a fixture 18. FIG. 13 shows an example in which the first control unit 2a and the second control unit 2b are respectively unitized. FIG. 13 shows an example in which the luminaire 1 is attached to the ceiling 19 of the room. The luminaire 1 is fixed to the ceiling 19 by a fixture 18.

  In the example shown in FIGS. 13 and 14, the lighting fixture 1 includes a first board 12 (not shown), a second board 13 (not shown), a first LED 12, a green LED 6, a blue LED 7, and a white LED 8. A case 14 and a second case 15 are provided. The lighting fixture 1 may include a cover 16 and a second cover 17. The example shown in FIGS. 13 and 14 is different from the example shown in FIGS. 11 and 12 in that the second case 15 is disposed outside the first case 14. In the example shown in FIGS. 13 and 14, the second case 15 is provided in the first case 14. However, the light from the white LED 8 is not blocked by the second case 15.

  In the present embodiment, the example in which the red LED 5, the green LED 6, and the blue LED 7 are used for illumination and visible light communication has been described. The red LED 5, the green LED 6, and the blue LED 7 may be used exclusively for visible light communication. Moreover, if possible arrangement | positioning, you may comprise red LED5, green LED6, and blue LED7 with one package. In the present embodiment, the example in which the lighting fixture 1 includes LEDs has been described. The lighting fixture 1 may include light emitting elements other than LEDs. For example, the luminaire 1 may include a light emitting element such as an organic EL.

Embodiment 2. FIG.
In this embodiment mode, a guidance display board type lighting device will be described. FIG. 15 is a diagram showing an example of a lighting apparatus according to Embodiment 2 of the present invention. FIG. 16 is a diagram illustrating a cross section taken along line FF in FIG. 15. The illuminating device in this Embodiment is provided with the lighting fixture 1 and the control unit 2 (not shown in FIG.15 and FIG.16), for example. The control unit 2 includes a first control unit 2a and a second control unit 2b.

  The luminaire 1 includes a red LED 5, a green LED 6, a blue LED 7, and a white LED 8. The 1st control part 2a controls red LED5, green LED6, and blue LED7. For example, the first controller 2a changes the intensity of the red light emitted from the red LED 5, the green light emitted from the green LED 6, and the blue light emitted from the blue LED 7 to change specific information from the lighting fixture 1. To send. Moreover, the 2nd control part 2b controls white LED8. The second controller 2b adjusts white light emitted from the white LED 8. The white LED 8 is for illumination and is not used for visible light communication.

  The lighting fixture 1 further includes a substrate 9, a case 10, and a cover 11. The red LED 5, the green LED 6, the blue LED 7 and the white LED 8 are provided on one substrate 9, for example. Further, the red LED 5, the green LED 6, the blue LED 7, the white LED 8 and the substrate 9 are supported by the case 10. The case 10 is disposed so as to surround the periphery of the red LED 5, the green LED 6, the blue LED 7, the white LED 8, and the substrate 9.

  The cover 11 is provided on the case 10, for example. The cover 11 is disposed so as to close the opening of the case 10. For example, letters and designs for guidance are attached to the surface of the cover 11. The cover 11 is disposed so as to face the red LED 5, the green LED 6, the blue LED 7, and the white LED 8. Red light emitted from the red LED 5 passes through the cover 11. Similarly, the green light emitted from the green LED 6 passes through the cover 11. Blue light emitted from the blue LED 7 passes through the cover 11. White light emitted from the white LED 8 passes through the cover 11.

  In the example shown in this embodiment mode, a guidance display board type lighting device can be provided with a communication function using light. Also in the present lighting device, the radiant flux of communication light is preferably 5% to 10% of the total radiant flux of light.

  Moreover, it is desirable that the LEDs provided in the lighting fixture 1 are regularly arranged. FIG. 15 shows an example in which three red LEDs 5, three green LEDs 6, three blue LEDs 7 and 24 white LEDs 8 are regularly arranged. In the example shown in FIG. 15, the white LEDs 8 are regularly arranged in 6 columns and 4 rows. The red LEDs 5 are arranged in a vertical row between the second row and the third row from the left of the white LED 8. Similarly, the green LEDs 6 are arranged in a vertical row between the third row and the fourth row from the left of the white LED 8. The blue LEDs 7 are arranged in a vertical row between the fourth row and the fifth row from the left of the white LED 8.

  17 and 18 are diagrams showing another example of the illumination device according to Embodiment 2 of the present invention. FIG. 17 shows an example in which the red LED 5, the green LED 6, and the blue LED 7 are arranged close to the center. In the example illustrated in FIG. 17, one red LED 5, one green LED 6, and one blue LED 7 are arranged in a square having four adjacent white LEDs 8 as vertices. In the example shown in FIG. 17, the red light emitted from the red LED 5, the green light emitted from the green LED 6, and the blue light emitted from the blue LED 7 are mixed to form white light. For this reason, RGB light mixes with the light radiated | emitted from white LED8 without discomfort. The red LED 5, the green LED 6, and the blue LED 7 may be configured in one package as shown in FIG.

  Also in the example shown in the present embodiment, it is desirable that the red LED 5, the green LED 6, and the blue LED 7 are not arranged on the outermost side. In the example shown in FIG. 15, the white LED 8 is arranged on the outermost side. By disposing the white LED 8 on the outermost side, the red light from the red LED 5, the green light from the green LED 6, and the blue light from the blue LED 7 are buried in the white light from the white LED 8, and can be made inconspicuous.

  FIG. 19 is a diagram showing another example of the illumination device according to Embodiment 2 of the present invention. FIG. 20 is a diagram illustrating a cross section of the lighting device. The example shown in FIGS. 19 and 20 is different from the examples shown in FIGS. 15 to 18 in the arrangement of LEDs. Further, the examples shown in FIGS. 19 and 20 are different from the examples shown in FIGS. 15 to 18 in that the luminaire 1 further includes a reflecting member 20.

  The luminaire 1 includes a red LED 5, a green LED 6, a blue LED 7, and a white LED 8. The red LED 5, the green LED 6, the blue LED 7, and the white LED 8 are provided on one elongated substrate 9, for example. 19 and 20 show an example in which one red LED 5, one green LED 6, one blue LED 7, and six white LEDs 8 are arranged in a line. Of the LEDs arranged in a row, white LEDs 8 are arranged at both ends. Thereby, the red light from the red LED 5, the green light from the green LED 6, and the blue light from the blue LED 7 can be buried in the white light from the white LED 8, and can be made inconspicuous. In addition, you may arrange | position LED in a line so that red LED5, green LED6, and blue LED7 may continue. Moreover, as shown in FIG. 17, you may arrange | position LED so that red LED5, green LED6, and blue LED7 may mutually adjoin. As shown in FIG. 18, the red LED 5, the green LED 6, and the blue LED 7 may be configured in one package.

  The reflection member 20 is supported by the case 10. The reflection member 20 is disposed so as to face the red LED 5, the green LED 6, the blue LED 7, and the white LED 8 obliquely. Further, the reflecting member 20 is disposed so as to face the cover 11 at an angle. The red light emitted from the red LED 5 hits the reflection member 20 and is reflected by the reflection member 20. The red light from the red LED 5 reflected by the reflecting member 20 passes through the cover 11. Similarly, the green light emitted from the green LED 6 hits the reflection member 20 and is reflected by the reflection member 20. The green light from the green LED 6 reflected by the reflecting member 20 passes through the cover 11. The blue light emitted from the blue LED 7 hits the reflection member 20 and is reflected by the reflection member 20. The blue light from the blue LED 7 reflected by the reflecting member 20 passes through the cover 11. White light emitted from the white LED 8 hits the reflection member 20 and is reflected by the reflection member 20. White light from the white LED 8 reflected by the reflecting member 20 passes through the cover 11.

  Even in the example shown in FIGS. 19 and 20, the guidance display board type lighting device can be provided with a communication function using light. Also in the present lighting device, the radiant flux of communication light is preferably 5% to 10% of the total radiant flux of light.

  In the present embodiment, the example in which the red LED 5, the green LED 6, and the blue LED 7 are used for illumination and visible light communication has been described. The red LED 5, the green LED 6, and the blue LED 7 may be used exclusively for visible light communication. Moreover, in this Embodiment, the lighting fixture 1 demonstrated the example provided with LED. The lighting fixture 1 may include light emitting elements other than LEDs. For example, the luminaire 1 may include a light emitting element such as an organic EL.

  The characteristics of the lighting device not disclosed in this embodiment are the same as any of the characteristics disclosed in the first embodiment.

  The control unit 2 includes a processing circuit including, for example, a processor and a memory as hardware resources. The control unit 2 implements each function of the first control unit 2a and the second control unit 2b by executing a program stored in the memory by a processor. Some or all of the functions of the control unit 2 may be realized by hardware.

  DESCRIPTION OF SYMBOLS 1 Lighting fixture, 2 Control unit, 2a 1st control part, 2b 2nd control part, 3 eaves, 4 Portable terminal, 5 Red LED, 6 Green LED, 7 Blue LED, 8 White LED, 9 Board | substrate, 10 Case, 11 Cover, 12 first substrate, 13 second substrate, 14 first case, 15 second case, 16 cover, 17 second cover, 18 fitting, 19 ceiling, 20 reflecting member, 21 lens

Claims (12)

A first light emitting element that emits red light;
A second light emitting element that emits green light;
A third light emitting element that emits blue light;
By changing at least one of red light emitted from the first light emitting element, green light emitted from the second light emitting element, and blue light emitted from the third light emitting element, a specific light is changed. First control means for transmitting information;
A fourth light emitting element that emits white light;
Second control means for adjusting white light emitted from the fourth light emitting element;
A lighting device comprising: A first light emitting element that emits red light toward a specific region;
A second light emitting element that emits green light toward the region;
A third light emitting element that emits blue light toward the region;
By changing at least one of red light emitted from the first light emitting element, green light emitted from the second light emitting element, and blue light emitted from the third light emitting element, a specific light is changed. First control means for transmitting information;
A fourth light emitting element that emits white light toward the region;
Second control means for adjusting white light emitted from the fourth light emitting element;
A lighting device comprising:   The lighting device according to claim 1, further comprising a substrate on which the first light emitting element, the second light emitting element, the third light emitting element, and the fourth light emitting element are provided.   The lighting device according to claim 1, further comprising a case surrounding the first light emitting element, the second light emitting element, the third light emitting element, and the fourth light emitting element.   The red light emitted from the first light emitting element, the green light emitted from the second light emitting element, the blue light emitted from the third light emitting element, and the white light emitted from the fourth light emitting element are transmitted. The lighting device according to claim 1, further comprising a cover. Reflects red light emitted from the first light emitting element, green light emitted from the second light emitting element, blue light emitted from the third light emitting element, and white light emitted from the fourth light emitting element. A reflective member;
Red light from the first light emitting element reflected by the reflecting member, green light from the second light emitting element reflected by the reflecting member, blue light from the third light emitting element reflected by the reflecting member, and the reflection A cover through which white light from the fourth light emitting element reflected by the member is transmitted;
The illuminating device according to claim 1 or 2, further comprising: A plurality of the fourth light emitting elements,
The said 4th light emitting element is arrange | positioned in the outermost side among the said 1st light emitting element, the said 2nd light emitting element, the said 3rd light emitting element, and the said 4th light emitting element. The lighting device described. A plurality of the fourth light emitting elements,
The first light emitting element, the second light emitting element, the third light emitting element, and the fourth light emitting element are arranged in a line,
The said 4th light emitting element is arrange | positioned at both ends among the said 1st light emitting element, the said 2nd light emitting element, the said 3rd light emitting element, and the said 4th light emitting element. Lighting equipment. A plurality of the fourth light emitting elements,
3. The lighting device according to claim 1, wherein the first light emitting element, the second light emitting element, and the third light emitting element are arranged to block a part of light from the fourth light emitting element. A first case supporting the fourth light emitting element;
A second case for supporting the first light emitting element, the second light emitting element, and the third light emitting element;
Further comprising
The lighting device according to claim 1, wherein the second case is provided in the first case.   Radiant flux of red light emitted from the first light emitting element, green light emitted from the second light emitting element, and blue light emitted from the third light emitting element is emitted from the first light emitting element. 5% to 10% of the radiant flux of red light, green light emitted from the second light emitting element, blue light emitted from the third light emitting element, and white light emitted from the fourth light emitting element. The illumination device according to any one of claims 1 to 10. The first light emitting element is a red LED;
The second light emitting element is a green LED,
The third light emitting element is a blue LED;
The lighting device according to any one of claims 1 to 11, wherein the fourth light emitting element is a white LED.

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