JP2018120759A - Illuminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminating device that can realize communication using light and can obtain a high color rendering property.SOLUTION: A first control unit 2a transmits specific information by changing at least one of red light emitted from a red LED 5, green light emitted from a green LED 6, and blue light emitted from a blue LED 7. A second control unit 2b adjusts white light emitted from a white LED 8. The red LED 5, the green LED 6, the blue LED 7, and the white LED 8 are collectively mounted on a board 9.SELECTED DRAWING: Figure 9

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 LEDs, namely red LED, green LED and 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 A fourth light emitting element that emits light, second control means for adjusting white light emitted from the fourth light emitting element, a transmission member, red light emitted from the first light emitting element, and emitted from the second light emitting element. The first light emitting element, the second light emitting element, and the like so that the mixed light of the green light, the blue light emitted from the third light emitting element and the white light emitted from the fourth light emitting element is emitted from the transmission member. The third light emitting element and the fourth light emitting element are centrally mounted. It includes a plate, a.

  A lighting 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 fourth light emitting element that emits white light. Specific information 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 first control means for transmitting the light, the second control means for adjusting the white light emitted from the fourth light emitting element, the transmission member, the red light emitted from the first light emitting element, and the second light emitting element emitted from the second light emitting element. A substrate on which a light source is provided so that light in which green light, blue light emitted from the third light emitting element, and white light emitted from the fourth light emitting element are mixed is emitted from the transmission member. .

  The illumination device according to the present invention includes a first red light emitting element and a second red light emitting element that emit red light, a first green light emitting element and a second green light emitting element that emit green light, and a first light emitting element that emits blue light. 1 blue light emitting element and second blue light emitting element, red light emitted from the first red light emitting element and second red light emitting element, green light emitted from the first green light emitting element and second green light emitting element, and the first First control means for transmitting specific information by changing at least one of blue light emitted from the blue light emitting element and the second blue light emitting element, and a first white light emitting element for emitting white light And a second white light emitting element, and second control means for adjusting white light emitted from the first white light emitting element and the second white light emitting element. The light emitting elements of the first red light emitting element, the first green light emitting element, the first blue light emitting element, and the first white light emitting element are the remaining three light emitting elements, the second red light emitting element, the second green light emitting element, The second blue light emitting element and the second white light emitting element are disposed closer to each other. All of the light emitting elements of the second red light emitting element, the second green light emitting element, the second blue light emitting element, and the second white light emitting element are the remaining three light emitting elements, the first red light emitting element, the first green light emitting element, The first blue light emitting element and the first white light emitting element are disposed closer to each other.

  The illumination device according to the present invention includes a first red light emitting element that emits red light, a first green light emitting element that emits green light, a first blue light emitting element that emits blue light, and a first white light emitting that emits white light. A first light source having an element; a second red light emitting element emitting red light; a second green light emitting element emitting green light; a second blue light emitting element emitting blue light; and a second white light emitting emitting white light A second light source having elements, red light emitted from the first red light emitting element and the second red light emitting element, green light emitted from the first green light emitting element and the second green light emitting element, and the first blue light emitting element, By changing at least one of the blue light emitted from the second blue light emitting element, the first control means for transmitting specific information, and the first white light emitting element and the second white light emitting element emit the specific information. Adjust white light Comprising a second control means.

  The illumination device according to the present invention, for example, emits 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 first control means for transmitting specific information and the second control means for adjusting the white light emitted from the fourth light emitting element are provided. If it is an illuminating device which concerns on this invention, while using the light, it can implement | achieve communication and high color rendering property can be acquired.

It is a figure which shows the usage 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 RGB light 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 a figure which shows the example of RGB light, white light, and the whole light radiated | emitted from a lighting fixture. It is a figure which shows the other example of the light radiated | emitted from a lighting fixture. It is a figure which shows the other example of the light radiated | emitted from a lighting fixture. The disassembled perspective view of a lighting fixture is shown. It is the figure which looked at the board | substrate and LED from the B direction shown in FIG. It is a figure which shows the example of arrangement | positioning of LED and a lens. It is a figure which shows the comparative example of a lighting fixture. It is a figure which shows a mode that the color breakage generate | occur | produced in the shadow part of the to-be-irradiated object. It is a figure which shows the other example of a lighting fixture. It is a figure which shows the other example of a lighting fixture. It is a figure which shows the usage example of the illuminating device in Embodiment 2 of this invention. It is a figure which shows the example of a lighting fixture. It is a disassembled perspective view of a lighting fixture. It is a figure which shows the example of arrangement | positioning of a board | substrate and LED. It is a figure which shows the comparative example of a lighting fixture. It is a figure which shows the comparative example of a lighting fixture. It is a figure which shows the other comparative example of a lighting fixture. It is a figure which shows the other comparative example of a lighting fixture. It is a figure which shows the usage example of the illuminating device in Embodiment 3 of this invention. It is a figure which shows CC cross section of FIG. It is a figure which shows the example of arrangement | positioning of a board | substrate and LED. It is a figure which shows the comparative example of a lighting fixture. It is a figure which shows the other comparative example of a lighting fixture. It is a figure which shows the other usage example of the illuminating device in Embodiment 3 of this invention. It is a figure which shows the cross section of the lighting fixture shown in FIG. It is a figure which shows the comparative example of a lighting fixture. It is a figure which shows the other comparative example of a lighting fixture.

  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 use of the illumination device 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 RGB light emitted from the lighting fixture 1. 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 one of the indices of color rendering properties indicating color reproducibility. In the following, the color rendering index is also referred to as an average color rendering index. 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, for example, at least one 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 to change the lighting fixture. The identification information is transmitted from 1.

  Any method may be used to change the light in order to transmit information from the lighting fixture 1. For example, the first control unit 2a changes the intensity of one or two colors 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. By doing so, 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 while keeping the color temperature of the light emitted from the lighting fixture 1 within a certain reference value or reference range, thereby obtaining the identification information from the lighting fixture 1. Send it. The “control condition as illumination” may be a light beam. For example, the first control unit 2a transmits the identification information from the lighting fixture 1 by minutely changing the brightness of the RGB light while keeping the luminous flux of the light emitted from the lighting fixture 1 within a certain reference value or reference range. You may let them. The first controller 2 a can individually adjust the red light radiant flux emitted from the red LED 5, the green light radiant flux emitted from the green LED 6, and the blue light radiant flux emitted from the blue LED 7. Various visible light communication techniques can be applied to the transmission of the identification information.

  In the example shown in FIG. 2, the luminaire 1 includes a plurality of white LEDs 8 in addition to the red LED 5, the green LED 6, and the blue LED 7. For example, the luminaire 1 includes the same number of red LEDs 5, green LEDs 6, blue LEDs 7, and white LEDs 8, respectively. 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. 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 controller 2b can independently control the white LED 8 regardless of the control performed by the first controller 2a. 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. For example, the second control unit 2b adjusts the radiant flux of 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. 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 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. The total light radiant flux 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. 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. 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 radiated from the luminaire 1 is 5% to 10% of the total radiant flux of light, communication using light can be realized and high color rendering can be 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.

  In the present lighting device, 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 individually adjusted by the control by the first controller 2a. The white light emitted from the white LED 8 is adjusted by the second controller 2b regardless of the control of the first controller 2a. For this reason, if it is this illumination device, the color reproducibility according to a user's liking can be implement | achieved.

  For example, FIG. 6 is a diagram illustrating an example of RGB light, white light, and overall light emitted from the lighting fixture 1. FIG. 6 shows an example in which the radiant flux of RGB light emitted from the luminaire 1 is 5% of the total radiant flux of light. 7 and 8 are diagrams illustrating another example of the light emitted from the lighting fixture 1. FIG. 7 shows an example in which red is emphasized. FIG. 8 shows an example in which blue is emphasized. Table 3 shows detailed data of the examples shown in FIGS.

  For example, if the user wants to highlight the red color of the irradiated object, the average color rendering index R9 may be increased by increasing the output of red light as shown in FIG. When the user wants to highlight the blue color of the irradiated object, the average color rendering index R12 may be increased by increasing the output of blue light as shown in FIG. With this illumination device, as shown in FIGS. 7 and 8, color fluctuations and correlated color temperature shifts are suppressed to levels that do not cause any practical problems, and color reproducibility according to user preferences is achieved. Can be realized. The said adjustment can be performed by changing the electric current sent through red LED5, green LED6, and blue LED7. If a means capable of changing the current value flowing through the red LED 5, the green LED 6, and the blue LED 7 is prepared in advance, the user may perform the above adjustment according to his / her preference after the lighting fixture 1 is installed. Is possible.

  Next, a specific example of the lighting fixture 1 will be described. FIG. 9 shows an exploded perspective view of the lighting fixture 1. In the example illustrated in FIG. 9, the lighting fixture 1 includes three red LEDs 5, three green LEDs 6, three blue LEDs 7, and three white LEDs 8. The lighting fixture 1 includes, for example, a substrate 9, three lenses 10, a case 11, and a lens holder 12 in addition to the 12 LEDs.

  FIG. 10 is a view of the substrate 9 and the LED viewed from the B direction shown in FIG. FIG. 11 is a diagram illustrating an arrangement example of the LED and the lens 10. In the example shown in FIGS. 9 to 11, one LED group is formed by one red LED 5, one green LED 6, one blue LED 7, and one white LED 8. 9 and 10 show an example in which the luminaire 1 includes three LED groups.

  In the following description, when it is necessary to individually specify the LEDs provided in the luminaire 1, as shown in FIGS. In the example shown in FIGS. 9 and 10, the same alphabetic characters are assigned to the LEDs belonging to the same LED group. That is, the luminaire 1 includes red LEDs 5a to 5c, green LEDs 6a to 6c, blue LEDs 7a to 7c, and white LEDs 8a to 8c. The red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belong to the LED group GA. The red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b belong to the LED group GB. The red LED 5c, the green LED 6c, the blue LED 7c, and the white LED 8c belong to the LED group GC. Similarly, when it is necessary to specify the lenses 10 individually, the letters 10 to c are added after the reference numerals as shown in FIG. 9 and FIG.

  The substrate 9 has a disk shape, for example. The red LEDs 5 a to 5 c, the green LEDs 6 a to 6 c, the blue LEDs 7 a to 7 c and the white LEDs 8 a to 8 c are provided on the substrate 9. The first controller 2a controls the red LEDs 5a to 5c, the green LEDs 6a to 6c, and the blue LEDs 7a to 7c. The first controller 2a changes at least one of red light emitted from the red LEDs 5a to 5c, green light emitted from the green LEDs 6a to 6c, and blue light emitted from the blue LEDs 7a to 7c. To send specific information. The first controller 2a can individually adjust the red light emitted from the red LEDs 5a to 5c, the green light emitted from the green LEDs 6a to 6c, and the blue light emitted from the blue LEDs 7a to 7c. The second control unit 2b controls the white LEDs 8a to 8c. The second controller 2b can adjust the white light emitted from the white LEDs 8a to 8c regardless of the control performed by the first controller 2a.

  The LEDs belonging to the same LED group are collected and arranged in a specific region of the substrate 9 so as to function as one light emitter that does not cause color breakage in the lighting fixture 1. For example, the red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belonging to the LED group GA are centrally mounted on the first region of the substrate 9 so as to function as one light emitter in the lighting fixture 1. Similarly, the red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b belonging to the LED group GB are centrally mounted on the second region of the substrate 9 so as to function as one light emitter in the lighting fixture 1. The red LED 5c, the green LED 6c, the blue LED 7c, and the white LED 8c belonging to the LED group GC are centrally mounted on the third region of the substrate 9 so as to function as one light emitter in the lighting fixture 1.

  In the LED group GA, the red LED 5a is adjacent to the blue LED 7a and the white LED 8a. The green LED 6a is adjacent to the blue LED 7a and the white LED 8a. The green LED 6a is disposed diagonally to the red LED 5a. As for the LEDs belonging to the LED group GA, the remaining LEDs are arranged closer to the LEDs belonging to the other LED groups. That is, the distance between the LEDs belonging to the LED group GA is shorter than the distance between the LEDs belonging to the LED group GA and the LEDs belonging to another LED group.

  For example, the green LED 6a is closer to the red LED 5a than the red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b. Similarly, the blue LED 7a is closer to the red LED 5a than the red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b. White LED 8a is closer to red LED 5a than red LED 5b, green LED 6b, blue LED 7b, and white LED 8b. The same applies to the green LED 6a, the blue LED 7a, and the white LED 8a. For example, the blue LED 7a is closer to the white LED 8a than the red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b.

  In the LED group GB, the red LED 5b is adjacent to the blue LED 7b and the white LED 8b. The green LED 6b is adjacent to the blue LED 7b and the white LED 8b. The green LED 6b is disposed diagonally to the red LED 5b. Regarding the LEDs belonging to the LED group GB, the remaining LEDs of any LED are arranged closer to the LEDs belonging to the other LED groups. That is, the distance between the LEDs belonging to the LED group GB is shorter than the distance between the LEDs belonging to the LED group GB and the LEDs belonging to another LED group.

  For example, the green LED 6b is closer to the red LED 5b than the red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a. Similarly, the blue LED 7b is closer to the red LED 5b than the red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a. White LED 8b is closer to red LED 5b than red LED 5a, green LED 6a, blue LED 7a, and white LED 8a. The same applies to the green LED 6b, the blue LED 7b, and the white LED 8b. For example, the blue LED 7b is closer to the white LED 8b than the red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a.

  The above is the description regarding the LEDs belonging to the LED group GA and the LEDs belonging to the LED group GB. The same applies to the LEDs belonging to the LED group GB and the LEDs belonging to the LED group GC. The same applies to LEDs belonging to the LED group GC and LEDs belonging to the LED group GA.

  The red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belonging to the LED group GA face the lens 10a. The red light emitted from the red LED 5a enters the lens 10a and passes through the lens 10a. Green light emitted from the green LED 6a enters the lens 10a and passes through the lens 10a. Blue light emitted from the blue LED 7a enters the lens 10a and passes through the lens 10a. White light emitted from the white LED 8a is incident on the lens 10a and passes through the lens 10a. The lens 10a emits light in which red light emitted from the red LED 5a, green light emitted from the green LED 6a, blue light emitted from the blue LED 7a, and white light emitted from the white LED 8a are mixed.

  The red LED 5b, green LED 6b, blue LED 7b, and white LED 8b belonging to the LED group GB face the lens 10b. The red light emitted from the red LED 5b enters the lens 10b and passes through the lens 10b. The green light emitted from the green LED 6b enters the lens 10b and passes through the lens 10b. Blue light emitted from the blue LED 7b enters the lens 10b and passes through the lens 10b. White light emitted from the white LED 8b enters the lens 10b and passes through the lens 10b. The lens 10b emits light in which red light emitted from the red LED 5b, green light emitted from the green LED 6b, blue light emitted from the blue LED 7b, and white light emitted from the white LED 8b are mixed.

  The red LED 5c, green LED 6c, blue LED 7c, and white LED 8c belonging to the LED group GC face the lens 10c. The red light emitted from the red LED 5c enters the lens 10c and passes through the lens 10c. The green light emitted from the green LED 6c enters the lens 10c and passes through the lens 10c. Blue light emitted from the blue LED 7c enters the lens 10c and passes through the lens 10c. White light emitted from the white LED 8c enters the lens 10c and passes through the lens 10c. The lens 10c emits light in which red light emitted from the red LED 5c, green light emitted from the green LED 6c, blue light emitted from the blue LED 7c, and white light emitted from the white LED 8c are mixed.

  In the example shown in the present embodiment, the lens 10 corresponds to the transmitting member described in the claims.

  The substrate 9 is supported by the case 11. FIG. 9 shows an example in which the case 11 has a cylindrical shape. The case 11 is disposed so as to surround the red LED 5, the green LED 6, the blue LED 7, and the white LED 8. The case 11 is arranged so as to surround the substrate 9 and the lens 10. The lens holder 12 is provided in the case 11, for example. Lens 10 is positioned by lens retainer 12.

  In the example shown in the present embodiment, one red LED 5, one green LED 6, one blue LED 7, and one white LED 8 are arranged in one place so as to function as one light emitter. Is done. The light emitted from the four LEDs is incident on one lens 10, and the lens 10 emits light obtained by mixing the light emitted from the four LEDs. For this reason, it is possible to prevent color breakup from occurring in the shadow portion of the irradiated object.

  FIG. 12 is a diagram illustrating a comparative example of a lighting fixture. FIG. 12 shows an undesirable example of a lighting fixture. FIG. 12 corresponds to a view of the luminaire as a comparative example seen from the direction B shown in FIG. In the example shown in FIG. 12A, the lighting fixture includes three sets of communication LED groups. Each communication LED group includes one red LED, one green LED, and one blue LED. One lens is provided for one communication LED group. In the example shown in FIG. 12A, 15 white LEDs are provided for illumination. One lens is provided for one white LED.

  In the example shown in FIG. 12B, one red LED, one green LED, and one blue LED are provided for communication. One lens is provided for the red LED. One lens is provided for the green LED. One lens is provided for the blue LED. In the example shown in FIG. 12B, 16 white LEDs are provided for illumination. One lens is provided for one white LED.

  In the example shown in FIGS. 12A and 12B, the number of lenses increases, and the lighting fixture increases in size. Moreover, in the example shown in FIG.12 (b), the red light from red LED, the green light from green LED, and the blue light from blue LED are radiated | emitted from a lighting fixture, without being mixed. For this reason, color breakage occurs in the shadow portion of the irradiated object. FIG. 13 is a diagram illustrating a state in which color breakup occurs in the shadow portion of the irradiated object. FIG. 13 shows an example in which light is applied to the irradiated object from the lighting apparatus shown in FIG.

  In the example shown in the present embodiment in contrast to the example shown in FIG. 12, one lens 10 is provided for one LED group. For this reason, the number of lenses 10 can be reduced and the lighting fixture 1 can be reduced in size. In the example shown in the present embodiment, four LEDs belonging to one LED group function as one light emitter. For this reason, it is possible to prevent color breakup from occurring in the shadow portion of the irradiated object.

  14 and 15 are diagrams showing another example of the lighting fixture 1. FIG. 14 corresponds to FIG. FIG. 15 corresponds to FIG. In the example shown in FIGS. 14 and 15, the luminaire 1 includes three LED packages 13 as light sources. The LED package 13 corresponds to the LED group in the example shown in FIGS. In the following description, differences from the examples shown in FIGS. 9 to 11 will be described in detail. Descriptions of features similar to those in the example illustrated in FIGS. 9 to 11 are omitted as appropriate. Moreover, when it is necessary to specify individually the LED package 13 with which the lighting fixture 1 was equipped, as shown in FIG.

  Each LED package 13 includes one red LED 5, one green LED 6, one blue LED 7, and one white LED 8. For example, the LED package 13a includes a red LED 5a, a green LED 6a, a blue LED 7a, and a white LED 8a. The LED package 13b includes a red LED 5b, a green LED 6b, a blue LED 7b, and a white LED 8b. The LED package 13c includes a red LED 5c, a green LED 6c, a blue LED 7c, and a white LED 8c. In addition to the LED package 13, the lighting fixture 1 includes, for example, a substrate 9, three lenses 10, a case 11, and a lens holder 12.

  The LED packages 13a to 13c are provided on the substrate 9. In the example shown in FIG.14 and FIG.15, the 1st control part 2a controls red LED 5a-5c, green LED 6a-6c, and blue LED 7a-7c. The first controller 2a changes at least one of red light emitted from the red LEDs 5a to 5c, green light emitted from the green LEDs 6a to 6c, and blue light emitted from the blue LEDs 7a to 7c. To send specific information. The first controller 2a can individually adjust the red light emitted from the red LEDs 5a to 5c, the green light emitted from the green LEDs 6a to 6c, and the blue light emitted from the blue LEDs 7a to 7c. The second control unit 2b controls the white LEDs 8a to 8c. The second controller 2b can adjust the white light emitted from the white LEDs 8a to 8c regardless of the control performed by the first controller 2a.

  The LED package 13a faces the lens 10a. That is, the red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a face the lens 10a. The LED package 13b faces the lens 10b. That is, the red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b face the lens 10b. The LED package 13c faces the lens 10c. That is, the red LED 5c, the green LED 6c, the blue LED 7c, and the white LED 8c face the lens 10c.

  The LED package 13a functions as one light emitter in the lighting fixture 1. For example, red light emitted from the red LED 5a enters the lens 10a and passes through the lens 10a. Green light emitted from the green LED 6a enters the lens 10a and passes through the lens 10a. Blue light emitted from the blue LED 7a enters the lens 10a and passes through the lens 10a. White light emitted from the white LED 8a is incident on the lens 10a and passes through the lens 10a. The lens 10a emits light in which red light emitted from the red LED 5a, green light emitted from the green LED 6a, blue light emitted from the blue LED 7a, and white light emitted from the white LED 8a are mixed.

  Similarly, the LED package 13b functions as one light emitter in the lighting fixture 1. For example, the lens 10b emits light that is a mixture of red light emitted from the red LED 5b, green light emitted from the green LED 6b, blue light emitted from the blue LED 7b, and white light emitted from the white LED 8b. The Moreover, the LED package 13c functions as one light emitter in the lighting fixture 1. For example, the lens 10c emits light in which red light emitted from the red LED 5c, green light emitted from the green LED 6c, blue light emitted from the blue LED 7c, and white light emitted from the white LED 8c are mixed. The

  Even in the example shown in FIGS. 14 and 15, the same effects as the effects shown in FIGS. 9 to 11 can be obtained. That is, even in the examples shown in FIGS. 14 and 15, communication using light can be realized and high color rendering can be obtained. Moreover, the number of lenses 10 can be reduced and the lighting fixture 1 can be reduced in size. Furthermore, it is possible to prevent color breakup from occurring in the shadow portion of the irradiated object.

  In the present embodiment, an example in which the lighting fixture 1 includes three LED groups or three LED packages 13 has been described. The number of LED groups or LED packages 13 included in the lighting fixture 1 may be increased or decreased from three according to the use of the lighting fixture 1 or the like. For example, when the number of LED groups included in the lighting fixture 1 is increased from three, the output of the lighting fixture 1 can be increased, and the signal transmission range can be expanded.

Embodiment 2. FIG.
FIG. 16 is a diagram showing an example of use of the illumination device according to Embodiment 2 of the present invention. In this embodiment, differences from the example shown in Embodiment 1 will be described in detail. Description of features similar to those of the example described in Embodiment 1 is omitted as appropriate. The lighting device includes, for example, a lighting fixture 1 and a control unit 2. In the present embodiment, an example in which the lighting device includes a base-type lighting fixture 1 will be described. The function of the control unit 2 is the same as the function disclosed in the first embodiment. For example, the control unit 2 includes a first control unit 2a and a second control unit 2b.

  FIG. 17 is a diagram illustrating an example of the lighting fixture 1. FIG. 18 is an exploded perspective view of the lighting fixture 1. In the example shown in FIGS. 17 and 18, the lighting fixture 1 includes eight red LEDs 5, eight green LEDs 6, eight blue LEDs 7, and eight white LEDs 8. The lighting fixture 1 includes, for example, a substrate 9, a case 11, and a cover 14 in addition to the 32 LEDs.

  FIG. 19 is a diagram illustrating an arrangement example of the substrate 9 and the LEDs. Also in the example shown in the present embodiment, one LED group is formed by one red LED 5, one green LED 6, one blue LED 7, and one white LED 8. FIG. 17 shows an example in which the luminaire 1 includes eight LED groups.

  Also in the following description, when it is necessary to individually specify the LEDs provided in the lighting fixture 1, the letters “a” to “h” are attached after each symbol as shown in FIG. In the example shown in FIG. 18, the same alphabetic characters are assigned to LEDs belonging to the same LED group. That is, the lighting fixture 1 includes red LEDs 5a to 5h, green LEDs 6a to 6h, blue LEDs 7a to 7h, and white LEDs 8a to 8h. The red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belong to the LED group GA. The red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b belong to the LED group GB. Similarly, the red LED 5h, the green LED 6h, the blue LED 7h, and the white LED 8h belong to the LED group GH.

  The substrate 9 has a rectangular shape, for example. The red LEDs 5 a to 5 h, the green LEDs 6 a to 6 h, the blue LEDs 7 a to 7 h, and the white LEDs 8 a to 8 h are provided on the substrate 9. The first controller 2a controls the red LEDs 5a to 5h, the green LEDs 6a to 6h, and the blue LEDs 7a to 7h. The first controller 2a changes at least one of red light emitted from the red LEDs 5a to 5h, green light emitted from the green LEDs 6a to 6h, and blue light emitted from the blue LEDs 7a to 7h. To send specific information. The first controller 2a can individually adjust red light emitted from the red LEDs 5a to 5h, green light emitted from the green LEDs 6a to 6h, and blue light emitted from the blue LEDs 7a to 7h. The second control unit 2b controls the white LEDs 8a to 8h. The second controller 2b can adjust the white light emitted from the white LEDs 8a to 8h regardless of the control performed by the first controller 2a.

  The LEDs belonging to the same LED group are collected and arranged in a specific region of the substrate 9 so as to function as one light emitter that does not cause color breakage in the lighting fixture 1. For example, the red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belonging to the LED group GA are centrally mounted on the first region of the substrate 9 so as to function as one light emitter in the lighting fixture 1. The red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b belonging to the LED group GB are centrally mounted on the second region of the substrate 9 so as to function as one light emitter in the lighting fixture 1. Similarly, the red LED 5h, the green LED 6h, the blue LED 7h, and the white LED 8h belonging to the LED group GH are centrally mounted on the eighth region of the substrate 9 so as to function as one light emitter in the lighting fixture 1. In the examples shown in FIGS. 17 to 19, since a plurality of LEDs belonging to the same LED group are arranged to function as one light emitter in the lighting fixture 1, color breakage or issue unevenness occurs in the cover 14. Can be prevented. If the cover 14 is formed of, for example, a milky white light diffusing member, it is possible to further suppress the occurrence of color breakup in the shadow portion of the irradiated object.

  In the LED group GA, the red LED 5a is adjacent to the blue LED 7a and the white LED 8a. The green LED 6a is adjacent to the blue LED 7a and the white LED 8a. The green LED 6a is disposed diagonally to the red LED 5a. As for the LEDs belonging to the LED group GA, the remaining LEDs are arranged closer to the LEDs belonging to the other LED groups. That is, the distance between the LEDs belonging to the LED group GA is shorter than the distance between the LEDs belonging to the LED group GA and the LEDs belonging to another LED group.

  Similarly, in the LED group GB, the red LED 5b is adjacent to the blue LED 7b and the white LED 8b. The green LED 6b is adjacent to the blue LED 7b and the white LED 8b. The green LED 6b is disposed diagonally to the red LED 5b. Regarding the LEDs belonging to the LED group GB, the remaining LEDs of any LED are arranged closer to the LEDs belonging to the other LED groups. That is, the distance between the LEDs belonging to the LED group GB is shorter than the distance between the LEDs belonging to the LED group GB and the LEDs belonging to another LED group.

  The same applies to the other LED groups. Regarding LEDs belonging to a certain LED group, any LED is arranged such that the remaining LED is closer to the LEDs belonging to the other LED groups. For example, the distance between LEDs belonging to the LED group GH is shorter than the distance between LEDs belonging to the LED group GH and LEDs belonging to other LED groups.

  The substrate 9 is supported by the case 11. 17 and 18 show an example in which the case 11 is shaped like a base of the substrate 9. The cover 14 is provided on the case 11, for example. The cover 14 is disposed so as to cover the substrate 9. The cover 14 is transparent or translucent. The cover 14 has a function of diffusing transmitted light, for example.

  The red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belonging to the LED group GA face the cover 14. The red light emitted from the red LED 5 a enters the cover 14 and passes through the cover 14. The green light emitted from the green LED 6 a enters the cover 14 and passes through the cover 14. The blue light emitted from the blue LED 7 a enters the cover 14 and passes through the cover 14. White light emitted from the white LED 8 a enters the cover 14 and passes through the cover 14. The cover 14 emits light in which red light emitted from the red LED 5a, green light emitted from the green LED 6a, blue light emitted from the blue LED 7a, and white light emitted from the white LED 8a are mixed.

  The red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b belonging to the LED group GB face the cover 14. The red light emitted from the red LED 5 b enters the cover 14 and passes through the cover 14. The green light emitted from the green LED 6 b enters the cover 14 and passes through the cover 14. Blue light emitted from the blue LED 7 b enters the cover 14 and passes through the cover 14. White light emitted from the white LED 8 b enters the cover 14 and passes through the cover 14. The cover 14 emits light in which red light emitted from the red LED 5b, green light emitted from the green LED 6b, blue light emitted from the blue LED 7b, and white light emitted from the white LED 8b are mixed.

  The same applies to the other LED groups. For example, a red LED 5h, a green LED 6h, a blue LED 7h, and a white LED 8h belonging to the LED group GH face the cover 14. The red light emitted from the red LED 5 h enters the cover 14 and passes through the cover 14. The green light emitted from the green LED 6 h enters the cover 14 and passes through the cover 14. The blue light emitted from the blue LED 7 h enters the cover 14 and passes through the cover 14. White light emitted from the white LED 8 h enters the cover 14 and passes through the cover 14. The cover 14 emits light in which red light emitted from the red LED 5h, green light emitted from the green LED 6h, blue light emitted from the blue LED 7h, and white light emitted from the white LED 8h are mixed.

  In the example shown in the present embodiment, the cover 14 corresponds to the transmissive member described in the claims.

  Even in the example shown in the present embodiment, the same effects as the effects disclosed in the first embodiment can be achieved. For example, in the example shown in the present embodiment, communication using light can be realized and high color rendering can be obtained.

  In the example shown in the present embodiment, one red LED 5, one green LED 6, one blue LED 7, and one white LED 8 are arranged in one place so as to function as one light emitter. Is done. The light emitted from the four LEDs is incident on the cover 14, and the cover 14 having diffusibility emits light obtained by mixing the light emitted from the four LEDs. Therefore, the cover 14 can further suppress the occurrence of color breakage in the shadow portion of the irradiated object.

  20 and 21 are diagrams showing comparative examples of lighting fixtures. 20 and 21 show an undesirable example of a lighting fixture. FIG. 20 is an exploded perspective view of the lighting fixture. In the example illustrated in FIGS. 20 and 21, the lighting fixture includes three sets of communication LED groups. Each communication LED group includes one red LED, one green LED, and one blue LED. In the example shown in FIGS. 20 and 21, six white LEDs are provided for illumination. The communication LED group and the white LED are arranged in a straight line at equal intervals. It is difficult to match the color of light emitted from the communication LED group with the color of light emitted from the white LED. For this reason, in the said lighting fixture, as shown in FIG. 21, white light emission nonuniformity or a brightness nonuniformity will generate | occur | produce.

  22 and 23 are diagrams showing another comparative example of the lighting fixture. 22 and 23 show an undesirable example of a lighting fixture. FIG. 22 is an exploded perspective view of the lighting fixture. In the example shown in FIGS. 22 and 23, one red LED, one green LED, and one blue LED are provided for communication. Further, in the example shown in FIGS. 22 and 23, six white LEDs are provided for illumination. The nine LEDs are arranged in a straight line at equal intervals. In the luminaire, as shown in FIG. 23, light emission unevenness of each color occurs in the portion of the cover where the communication LED faces.

  20 to FIG. 23, in the example shown in the present embodiment, four LEDs belonging to one LED group function as one light emitter. For this reason, it is possible to prevent the cover 14 from causing color breakage or light emission unevenness.

  Also in the example shown in the present embodiment, the lighting fixture 1 may include the LED package 13 as a light source. The LED package 13 includes, for example, one red LED 5, one green LED 6, one blue LED 7, and one white LED 8. The LED package 13 is provided on the substrate 9 so as to face the cover 14. When the LED package 13 is applied to the lighting fixture 1 shown in FIGS. 17 to 19, for example, eight LED packages 13 are arranged in a straight line at equal intervals.

Embodiment 3 FIG.
FIG. 24 is a diagram showing an example of use of the illumination device according to Embodiment 3 of the present invention. In this embodiment, differences from the example shown in Embodiment 1 will be described in detail. Description of matters similar to those in the example described in Embodiment 1 is omitted as appropriate. The lighting device includes, for example, a lighting fixture 1 and a control unit 2 (not shown in FIG. 24). In the present embodiment, an example in which the lighting device includes a guidance display board type lighting fixture 1 will be described. The function of the control unit 2 is the same as the function disclosed in the first embodiment. For example, the control unit 2 includes a first control unit 2a and a second control unit 2b.

  FIG. 25 is a view showing a CC cross section of FIG. In the example shown in FIGS. 24 and 25, the lighting fixture 1 includes 24 red LEDs 5, 24 green LEDs 6, 24 blue LEDs 7, and 24 white LEDs 8. The lighting fixture 1 includes, for example, a substrate 9, a case 11, and a cover 14 in addition to the 96 LEDs. FIG. 24 shows a state where the cover 14 is removed from the case 11.

  FIG. 26 is a diagram illustrating an arrangement example of the substrate 9 and the LEDs. Also in the example shown in the present embodiment, one LED group is formed by one red LED 5, one green LED 6, one blue LED 7, and one white LED 8. FIG. 24 shows an example in which the luminaire 1 includes 24 LED groups.

  In the example shown in this embodiment, since the number of LEDs is large, only the LEDs belonging to the LED group GA and the LEDs belonging to the LED group GB are distinguished from other LEDs by adding an alphabetic character after the reference numerals. For example, the red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belong to the LED group GA. The red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b belong to the LED group GB.

  The substrate 9 has a rectangular shape, for example. The red LED 5, the green LED 6, the blue LED 7, and the white LED 8 are provided on the substrate 9. The 1st control part 2a controls red LED5, green LED6, and blue LED7. The first control unit 2a changes specific light by changing at least one 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. Send. 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 second control unit 2b controls the white LED 8. The second controller 2b can adjust the white light emitted from the white LED 8 regardless of the control performed by the first controller 2a.

  The LEDs belonging to the same LED group are collected and arranged in a specific region of the substrate 9 so as to function as one light emitter that does not cause color breakage in the lighting fixture 1. For example, the red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belonging to the LED group GA are centrally mounted on the first region of the substrate 9 so as to function as one light emitter in the lighting fixture 1. The red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b belonging to the LED group GB are centrally mounted on the second region of the substrate 9 so as to function as one light emitter in the lighting fixture 1.

  In the LED group GA, the red LED 5a is adjacent to the blue LED 7a and the white LED 8a. The green LED 6a is adjacent to the blue LED 7a and the white LED 8a. The green LED 6a is disposed diagonally to the red LED 5a. As for the LEDs belonging to the LED group GA, the remaining LEDs are arranged closer to the LEDs belonging to the other LED groups. That is, the distance between the LEDs belonging to the LED group GA is shorter than the distance between the LEDs belonging to the LED group GA and the LEDs belonging to another LED group.

  In the LED group GB, the red LED 5b is adjacent to the blue LED 7b and the white LED 8b. The green LED 6b is adjacent to the blue LED 7b and the white LED 8b. The green LED 6b is disposed diagonally to the red LED 5b. Regarding the LEDs belonging to the LED group GB, the remaining LEDs of any LED are arranged closer to the LEDs belonging to the other LED groups. That is, the distance between the LEDs belonging to the LED group GB is shorter than the distance between the LEDs belonging to the LED group GB and the LEDs belonging to another LED group.

  The same applies to the other LED groups. Regarding LEDs belonging to a certain LED group, any LED is arranged such that the remaining LED is closer to the LEDs belonging to the other LED groups.

  The substrate 9 is supported by the case 11. 24 and 25 show an example in which the case 11 has a box shape. The case 11 is disposed so as to surround the red LED 5, the green LED 6, the blue LED 7, and the white LED 8. The case 11 is disposed so as to surround the periphery of the substrate 9. The cover 14 is provided in the case 11 so as to close the opening of the case 11, for example. The cover 14 is disposed so as to cover the substrate 9. The cover 14 is transparent or translucent. For example, characters and designs for guidance are attached to the surface of the cover 14.

  The red LED 5a, the green LED 6a, the blue LED 7a, and the white LED 8a belonging to the LED group GA face the cover 14. The red light emitted from the red LED 5 a enters the cover 14 and passes through the cover 14. The green light emitted from the green LED 6 a enters the cover 14 and passes through the cover 14. The blue light emitted from the blue LED 7 a enters the cover 14 and passes through the cover 14. White light emitted from the white LED 8 a enters the cover 14 and passes through the cover 14. The cover 14 emits light in which red light emitted from the red LED 5a, green light emitted from the green LED 6a, blue light emitted from the blue LED 7a, and white light emitted from the white LED 8a are mixed.

  The red LED 5b, the green LED 6b, the blue LED 7b, and the white LED 8b belonging to the LED group GB face the cover 14. The red light emitted from the red LED 5 b enters the cover 14 and passes through the cover 14. The green light emitted from the green LED 6 b enters the cover 14 and passes through the cover 14. Blue light emitted from the blue LED 7 b enters the cover 14 and passes through the cover 14. White light emitted from the white LED 8 b enters the cover 14 and passes through the cover 14. The cover 14 emits light in which red light emitted from the red LED 5b, green light emitted from the green LED 6b, blue light emitted from the blue LED 7b, and white light emitted from the white LED 8b are mixed.

  The same applies to the other LED groups. The cover 14 emits light in which 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 are mixed.

  In the example shown in the present embodiment, the cover 14 corresponds to the transmissive member described in the claims.

  Even in the example shown in the present embodiment, the same effects as the effects disclosed in the first embodiment can be achieved. For example, in the example shown in this embodiment, a guidance display board type lighting device can be provided with a communication function using light.

  In the example shown in the present embodiment, one red LED 5, one green LED 6, one blue LED 7, and one white LED 8 are arranged in one place so as to function as one light emitter. Is done. The light emitted from the four LEDs is incident on the cover 14, and the cover 14 emits light obtained by mixing the light emitted from the four LEDs. For this reason, it is possible to prevent the cover 14 from causing color breakage or light emission unevenness.

  FIG. 27 is a diagram illustrating a comparative example of a lighting fixture. FIG. 27 shows an undesirable example of a lighting fixture. In the example shown in FIG. 27, the lighting fixture includes two sets of communication LED groups. Each communication LED group includes one red LED, one green LED, and one blue LED. In the example shown in FIG. 27, 22 white LEDs are provided for illumination. The communication LED group and the white LED are arranged in a grid at equal intervals. It is difficult to match the color of light emitted from the communication LED group with the color of light emitted from the white LED. For this reason, in the said lighting fixture, white light emission nonuniformity or brightness nonuniformity will generate | occur | produce.

  FIG. 28 is a diagram illustrating another comparative example of the lighting fixture. FIG. 28 shows an undesirable example of a lighting fixture. In the example shown in FIG. 28, three red LEDs, three green LEDs, and three blue LEDs are provided for communication. In the example shown in FIG. 28, 24 white LEDs are provided for illumination. The 24 white LEDs are arranged in a lattice at equal intervals. The nine LEDs for communication are arranged between white LEDs. In the said lighting fixture, the light emission nonuniformity of each color will generate | occur | produce in the part which LED for communication opposes among covers.

  27 and FIG. 28, in the example shown in the present embodiment, four LEDs belonging to one LED group function as one light emitter. For this reason, it is possible to prevent the cover 14 from causing color breakage or light emission unevenness.

  Also in the example shown in FIGS. 24 to 26, the luminaire 1 may include the LED package 13 as a light source. The LED package 13 includes, for example, one red LED 5, one green LED 6, one blue LED 7, and one white LED 8. The LED package 13 is provided on the substrate 9 so as to face the cover 14. When the LED package 13 is applied to the luminaire 1 shown in FIGS. 24 to 26, for example, 24 LED packages 13 are arranged in a lattice at equal intervals.

  FIG. 29 is a diagram showing another example of use of the illumination device according to Embodiment 3 of the present invention. The lighting device includes, for example, a lighting fixture 1 and a control unit 2 (not shown in FIG. 29). The function of the control unit 2 is the same as the above-described example. FIG. 30 is a diagram illustrating a cross section of the lighting fixture 1 illustrated in FIG. 29. In the example shown in FIGS. 29 and 30, the luminaire 1 includes nine red LEDs 5, nine green LEDs 6, nine blue LEDs 7, and nine white LEDs 8. The luminaire 1 includes, for example, a substrate 9, a case 11, a cover 14, and a reflecting member 15 in addition to the 36 LEDs.

  The red LED 5, the green LED 6, the blue LED 7, and the white LED 8 are provided on the substrate 9. In the example shown in FIGS. 29 and 30, one LED group is formed by one red LED 5, one green LED 6, one blue LED 7, and one white LED 8. FIG. 29 shows an example in which the luminaire 1 includes nine LED groups. LEDs belonging to the same LED group are centrally mounted on a specific region of the substrate 9 so as to function as one light emitter that does not cause color breakage in the lighting fixture 1. In the example shown in FIGS. 29 and 30, a plurality of LEDs belonging to the same LED group are arranged to function as one light emitter in the lighting fixture 1, so that color cracking or issue unevenness occurs in the cover 14. Can be prevented. If the cover 14 is formed of, for example, a milky white light diffusing member, it is possible to further suppress the occurrence of color breakup in the shadow portion of the irradiated object.

  The substrate 9 is supported by the case 11. The reflection member 15 is supported by the case 11. The cover 14 is provided in the case 11 so as to close the opening of the case 11, for example. The cover 14 is disposed so as to cover the substrate 9 and the reflecting member 15. The cover 14 is transparent or translucent. For example, characters and designs for guidance are attached to the surface of the cover 14.

  The reflecting member 15 is diagonally opposed to the red LED 5, the green LED 6, the blue LED 7, and the white LED 8. The reflecting member 15 faces the cover 14 at an angle. In each LED group, red light emitted from the red LED 5 hits the reflection member 15 and is reflected by the reflection member 15. The red light from the red LED 5 reflected by the reflecting member 15 enters the cover 14 and passes through the cover 14. The green light emitted from the green LED 6 strikes the reflecting member 15 and is reflected by the reflecting member 15. The green light from the green LED 6 reflected by the reflecting member 15 enters the cover 14 and passes through the cover 14. The blue light emitted from the blue LED 7 hits the reflection member 15 and is reflected by the reflection member 15. The blue light from the blue LED 7 reflected by the reflecting member 15 enters the cover 14 and passes through the cover 14. White light emitted from the white LED 8 hits the reflection member 15 and is reflected by the reflection member 15. White light from the white LED 8 reflected by the reflecting member 15 enters the cover 14 and passes through the cover 14. From the cover 14, red light emitted from the red LED 5 reflected by the reflecting member 15, green light emitted from the green LED 6 reflected by the reflecting member 15, blue light emitted from the blue LED 7 reflected by the reflecting member 15, and Light mixed with white light emitted from the white LED 8 reflected by the reflecting member 15 is emitted.

  In the example shown in FIGS. 29 and 30, the cover 14 corresponds to the transmitting member described in the claims.

  Even in the examples shown in FIGS. 29 and 30, the same effects as the effects shown in the examples shown in FIGS. 24 to 26 can be obtained. For example, in the example shown in FIGS. 29 and 30, a guidance display board type lighting device can be provided with a communication function using light.

  In the example shown in FIGS. 29 and 30, one red LED 5, one green LED 6, one blue LED 7, and one white LED 8 are concentrated in one place so as to function as one light emitter. Be placed. The light emitted from the four LEDs is reflected by the reflecting member 15 and then enters the cover 14, and the cover 14 emits light obtained by mixing the light emitted from the four LEDs. For this reason, it is possible to prevent the cover 14 from causing color breakage or light emission unevenness.

  FIG. 31 is a diagram illustrating a comparative example of a lighting fixture. FIG. 31 shows an undesirable example of a lighting fixture. In the example shown in FIG. 31, the lighting fixture includes three sets of communication LED groups. Each communication LED group includes one red LED, one green LED, and one blue LED. In the example shown in FIG. 31, six white LEDs are provided for illumination. The communication LED group and the white LED are arranged in a straight line at equal intervals. It is difficult to match the color of light emitted from the communication LED group with the color of light emitted from the white LED. For this reason, in the said lighting fixture, white light emission nonuniformity or brightness nonuniformity will generate | occur | produce.

  FIG. 32 is a diagram illustrating another comparative example of the lighting fixture. FIG. 32 shows an undesirable example of a lighting fixture. In the example shown in FIG. 32, one red LED, one green LED, and one blue LED are provided for communication. In the example shown in FIG. 32, six white LEDs are provided for illumination. The nine LEDs are arranged in a straight line at equal intervals. In the said lighting fixture, the light emission nonuniformity of red, green, and blue will generate | occur | produce in a part of cover.

  In the example shown in FIGS. 29 and 30 with respect to the example shown in FIGS. 31 and 32, four LEDs belonging to one LED group function as one light emitter. For this reason, it is possible to prevent the cover 14 from causing color breakage or light emission unevenness.

  Also in the example shown in FIG.29 and FIG.30, the lighting fixture 1 may be provided with the LED package 13 as a light source. The LED package 13 includes, for example, one red LED 5, one green LED 6, one blue LED 7, and one white LED 8. The LED package 13 is provided on the substrate 9 so as to face the reflecting member 15 at an angle. When the LED package 13 is applied to the luminaire 1 shown in FIGS. 29 and 30, for example, nine LED packages 13 are arranged in a straight line at equal intervals.

  In the first to third embodiments, examples in which the red LED 5, the green LED 6, and the blue LED 7 are used for illumination and visible light communication have been described. The red LED 5, the green LED 6, and the blue LED 7 may be used exclusively for visible light communication. In Embodiments 1 to 3, 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.

  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 鞄 4 Portable terminal 5 Red LED
6 Green LED
7 Blue LED
8 White LED
9 Substrate 10 Lens 11 Case 12 Lens presser 13 LED package 14 Cover 15 Reflective member

Claims (18)

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 transmissive member;
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 mixed. 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 intensively mounted so that the transmitted light is emitted from the transmission member;
A lighting device comprising: A light source having 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 fourth light emitting element that emits white 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;
Second control means for adjusting white light emitted from the fourth light emitting element;
A transmissive member;
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 mixed. A substrate provided with the light source so that the transmitted light is emitted from the transmission member;
A lighting device comprising:   The lighting device according to claim 1, wherein the transmission member is a cover that covers the substrate.   The lighting device according to claim 1, wherein the transmissive member is a lens facing the first light emitting element, the second light emitting element, the third light emitting element, and the fourth light emitting element.   The lighting device according to any one of claims 1 to 4, 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. 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 reflection 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 The illuminating device according to claim 1, wherein white light from the fourth light emitting element reflected by the member is transmitted through the transmissive member.   The first control unit is configured to emit red light radiant flux emitted from the first light emitting element, green light radiant flux emitted from the second light emitting element, and blue light emitted from the third light emitting element. The lighting device according to any one of claims 1 to 6, wherein the bundles can be individually adjusted. 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 7, wherein the fourth light emitting element is a white LED. A first red light emitting element and a second red light emitting element emitting red light;
A first green light emitting element and a second green light emitting element emitting green light;
A first blue light-emitting element and a second blue light-emitting element that emit blue light;
Red light emitted from the first red light emitting element and the second red light emitting element, green light emitted from the first green light emitting element and the second green light emitting element, and the first blue light emitting element and the second First control means for transmitting specific information by changing at least one of blue light emitted from the blue light emitting element;
A first white light emitting element and a second white light emitting element that emit white light;
Second control means for adjusting white light emitted from the first white light emitting element and the second white light emitting element;
With
The light emitting elements of the first red light emitting element, the first green light emitting element, the first blue light emitting element, and the first white light emitting element are the remaining three light emitting elements, the second red light emitting element, Disposed closer to the second green light emitting element, the second blue light emitting element and the second white light emitting element,
The light emitting elements of the second red light emitting element, the second green light emitting element, the second blue light emitting element and the second white light emitting element are the remaining three light emitting elements, the first red light emitting element, A lighting device disposed closer to the first green light emitting element, the first blue light emitting element, and the first white light emitting element.   The first red light emitting element, the second red light emitting element, the first green light emitting element, the second green light emitting element, the first blue light emitting element, the second blue light emitting element, the first white light emitting element, and the The lighting device according to claim 9, further comprising a substrate on which the second white light emitting element is provided. A first light source having a first red light emitting element that emits red light, a first green light emitting element that emits green light, a first blue light emitting element that emits blue light, and a first white light emitting element that emits white light;
A second light source having a second red light emitting element that emits red light, a second green light emitting element that emits green light, a second blue light emitting element that emits blue light, and a second white light emitting element that emits white light;
Red light emitted from the first red light emitting element and the second red light emitting element, green light emitted from the first green light emitting element and the second green light emitting element, and the first blue light emitting element and the second First control means for transmitting specific information by changing at least one of blue light emitted from the blue light emitting element;
Second control means for adjusting white light emitted from the first white light emitting element and the second white light emitting element;
A lighting device comprising:   The lighting device according to claim 11, further comprising a substrate on which the first light source and the second light source are provided.   The lighting device according to claim 10, further comprising a cover that covers the substrate. A first lens facing the first red light emitting element, the first green light emitting element, the first blue light emitting element, and the first white light emitting element;
A second lens facing the second red light emitting element, the second green light emitting element, the second blue light emitting element, and the second white light emitting element;
The illumination device according to any one of claims 9 to 12, further comprising:   The first red light emitting element, the second red light emitting element, the first green light emitting element, the second green light emitting element, the first blue light emitting element, the second blue light emitting element, the first white light emitting element, and the The lighting device according to any one of claims 9 to 14, further comprising a case surrounding the periphery of the second white light emitting element. Red light emitted from the first red light emitting element and the second red light emitting element, green light emitted from the first green light emitting element and the second green light emitting element, the first blue light emitting element and the second A reflective member that reflects blue light emitted from the blue light emitting element and white light emitted from the first white light emitting element and the second white light emitting element;
Red light from the first red light emitting element and the second red light emitting element reflected by the reflecting member, green light from the first green light emitting element and the second green light emitting element reflected by the reflecting member, and the reflection A cover through which the blue light from the first blue light-emitting element and the second blue light-emitting element reflected by the member and the white light from the first white light-emitting element and the second white light-emitting element reflected from the reflection member are transmitted; ,
The illumination device according to any one of claims 9 to 12, further comprising:   The first control means includes a red light radiant flux emitted from the first red light emitting element and the second red light emitting element, and a green light emitted from the first green light emitting element and the second green light emitting element. The illuminating device according to any one of claims 9 to 16, wherein a radiant flux and a radiant flux of blue light emitted from the first blue light emitting element and the second blue light emitting element can be individually adjusted. The first red light emitting element and the second red light emitting element are red LEDs,
The first green light emitting element and the second green light emitting element are green LEDs,
The first blue light emitting element and the second blue light emitting element are blue LEDs,
The lighting device according to any one of claims 9 to 17, wherein the first white light emitting element and the second white light emitting element are white LEDs.

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