WO2015125557A1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

Info

Publication number
WO2015125557A1
WO2015125557A1 PCT/JP2015/051970 JP2015051970W WO2015125557A1 WO 2015125557 A1 WO2015125557 A1 WO 2015125557A1 JP 2015051970 W JP2015051970 W JP 2015051970W WO 2015125557 A1 WO2015125557 A1 WO 2015125557A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
intensity
angular
light source
optical system
Prior art date
Application number
PCT/JP2015/051970
Other languages
English (en)
Japanese (ja)
Inventor
鷹彦 菖蒲
由紀 直井
佳恵 清水
光 長澤
宏哉 鈴木
Original Assignee
コニカミノルタ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コニカミノルタ株式会社 filed Critical コニカミノルタ株式会社
Priority to JP2016504011A priority Critical patent/JPWO2015125557A1/ja
Publication of WO2015125557A1 publication Critical patent/WO2015125557A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • F21S8/032—Lighting devices intended for fixed installation of surface-mounted type the surface being a floor or like ground surface, e.g. pavement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • F21S8/033—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade
    • F21S8/037—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade for mounting in a corner, i.e. between adjacent walls or wall and ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/10—Light sources with three-dimensionally disposed light-generating elements on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to an illuminating device, for example, an illuminating device capable of gradation illumination of a wall surface or the like.
  • chromatic lighting has been spreading in the space production field. For example, it is expected to further enhance the audience's excitement by reproducing nature such as the morning sun and sunset with chromatic lighting on the stage of theaters and concerts.
  • gradation illumination in which brightness and color change smoothly within the illuminated surface and unevenness that impairs aesthetics is suppressed. It is preferable to do. Further, in order to enhance the lighting effect, it is desired that the lighting apparatus is downsized to some extent so that the lighting fixture is not conspicuous.
  • Patent Document 1 discloses that a plurality of irradiation areas are formed by emitting light of different colors from a plurality of light sources, and each of the plurality of irradiation areas has a mixed color obtained by mixing different colors of light.
  • an illuminating device that includes an overlapped intermediate region and that can change at least one size of a plurality of irradiation regions by an actuator.
  • the present invention has been made in view of the above circumstances, and provides an illuminating device that does not have a movable part, is small, and can realize excellent gradation illumination without impairing beauty on a wide surface. With the goal.
  • an illumination device that reflects one aspect of the present invention includes a first light source that emits a first light flux, and a first light source that includes the first light source.
  • a substrate a first optical system having a condensing function with respect to the first light beam emitted from the first light source, a second light source that emits a second light beam, and the second light source.
  • An attached second substrate, and a second optical system having a condensing function with respect to the second light beam emitted from the second light source The longitudinal axes of the first substrate and the second substrate extend substantially in parallel, The chromaticity of the first luminous flux is different from that of the second luminous flux, The first light beam emitted from the first optical system and the second light emitted from the second optical system on a surface orthogonal to the axis of the first substrate or the second substrate.
  • the intensity is PK2
  • the angular position of the intersection of the first light flux and the second light flux on the angular intensity distribution is PCS
  • the intensity is SCS
  • an illuminating device that can realize excellent gradation illumination on a wide surface without impairing aesthetics, while having no movable part and being compact.
  • FIG. 4 is a cross-sectional view of the configuration of FIG. 3 cut along a plane IV. It is sectional drawing which shows the illuminating device 100 in use condition. It is a figure which shows the relationship between the illuminating device and the room to illuminate used in the simulation of the Example. It is sectional drawing of the illuminating device of Example 1.
  • FIG. 4 shows the example of angular intensity distribution for description of an example of this illuminating device, a horizontal axis is an angle and a vertical axis
  • shaft is an intensity
  • positioning of the light emitting element of this illuminating device It is a perspective view which shows the illuminating device 100 of this embodiment.
  • FIG. 4 is a cross-sectional view of the configuration of FIG. 3 cut along a plane IV. It is sectional drawing which shows the illuminating device 100 in use condition. It is a figure which shows the relationship between the illuminating device and the room to illuminate used in the simulation of the Example. It is sectional drawing of
  • FIG. 6 is a ray diagram in increments of NA10 in the light beam emitted from the first LED 14.
  • FIG. 7 is an angular intensity distribution diagram of emitted light beams of the first LED and the second LED in the cross section of FIG. 6. It is a graph which shows a part of chromaticity distribution of the vertical color gradation which passes along the illumination intensity peak (the brightest place on an irradiation surface) of an irradiation surface. It is sectional drawing of the illuminating device of Example 2.
  • FIG. FIG. 7 is an angular intensity distribution diagram of emitted light beams of the first LED and the second LED in the cross section of FIG. 6.
  • FIG. (A) (b) is the figure which showed the irradiation area
  • the angular intensity distribution of the first light flux is indicated by AD1 on the surface orthogonal to the axis of the first substrate or the second substrate in the example of the illumination device of the present invention, and the angle of the second light flux.
  • the intensity distribution is indicated by AD2.
  • AD3 the angular intensity distribution of the third light beam is indicated by AD3, it is provided for the sake of explanation and is not related to the presence or absence of the third light beam.
  • the angle position where the intensity is highest in the angular intensity distribution AD1 of the first light beam is PS1
  • the intensity is PK1
  • the angle position where the intensity is highest in the angle intensity distribution AD2 of the second light beam is PS2.
  • the intensity is PK2
  • the angular position of the intersection CP1 between the angular intensity distribution AD1 of the first light flux and the angular intensity distribution AD2 of the second light flux is PCS
  • the intensity is SCS, the above formula (1) Satisfy (3).
  • the angular position PS1 at which the intensity of the first light beam becomes the highest and the angular position PS2 at which the intensity of the second light beam becomes the highest can be shifted, and the light beam having the highest intensity is obtained. Because it can be emphasized with a single color, beautiful gradation lighting can be achieved. In addition, since the intersection point CP1 exists between the angular position PS1 at which the intensity of the first light flux becomes highest and the angular position PS2 at which the intensity of the second light flux becomes highest, the other intensity is lower than the peak intensity. Because it is mixed equally with the color of, beautiful gradation lighting can be performed.
  • the angular position PCS is one point.
  • CP2 intersections
  • CP3 angle intensity distribution
  • unexpected color mixing may occur, beautiful gradation illumination may not be performed, and unnecessary light flux increases, so it can be said that the efficiency is poor.
  • the intensity value of the intersection point is less than 5% of the peak intensity values PK1 and PK2 of the angular intensity distributions AD1 and AD2, respectively, it is considered that there is no intersection point because it hardly contributes to illumination.
  • the ratio of the mixed area compared to the monochromatic area By separating the angular position PS1 at which the intensity of the first light flux becomes highest and the angular position PS2 at which the intensity of the second light flux becomes highest to be equal to or more than the lower limit of the expression (7), the ratio of the mixed area compared to the monochromatic area On the other hand, the ratio of the monochromatic area does not increase too much compared to the mixed area by separating it below the upper limit of the expression (7), and a balanced gradation illumination can be performed.
  • the minimum value of the angular intensity distribution of the first light flux between the angular position PCS and the angular position PS2 is MN1, and the second light flux between the angular position PCS and the angular position PS1.
  • MN1 / PK1 ⁇ 0.2 (8) MN2 / PK2 ⁇ 0.2 (9)
  • the first light source and the second light source are LEDs, and the first optical system and the second optical system are integrally formed.
  • Light emitting diodes LEDs
  • the first optical system and the second optical system are integrally formed.
  • LEDs Light emitting diodes
  • the number of parts can be reduced and the assembly process can be simplified.
  • it can be controlled with a single chip, there is also an advantage that chromaticity and intensity changes can be made finely and easily.
  • At least one of the first light source and the second light source has a plurality of light emitters capable of independently emitting light, and the first optical system and the light source are selected by selecting the light emitters to emit light. It is preferable that the angular intensity distribution of the light beam emitted from at least one of the second optical systems can be changed.
  • FIG. 2 is a view of an example of a main part of the present lighting device as viewed in the longitudinal direction of the substrate.
  • light emitters LM1 to LM5 are attached to five substrates ST1 to ST5.
  • the substrates ST1 to ST4 have different attachment angles ⁇ 1 to ⁇ 4.
  • the mounting angles ⁇ 4 and ⁇ 5 of the substrates ST4 and ST5 are equal.
  • the light emitters LM1 to LM5 can be controlled to be turned on independently, and the light beams emitted from the light emitters LM1 to LM3 travel in the normal direction of the substrates ST1 to ST5.
  • the first light source is composed of the light emitters LM1 to LM3
  • the second light source is composed of the light emitters LM4 and LM5.
  • the angular intensity distribution of the first light flux when the light emitters LM1 and LM2 are turned on and the light emitter LM3 is turned off is the angle intensity distribution when the light emitters LM2 and LM3 are turned on and the light emitter LM1 is turned off.
  • the shape of the distribution and the optimal solution for the mixed area differ. According to the present invention, it is possible to change the profile including the intersection position and the peak intensity position of the gradation illumination by turning on and off the light emitter without using the movable portion, and the degree of freedom of illumination is improved.
  • At least one of the first optical system and the second optical system is at least one of a reflector and a lens. Thereby, the emission angle and intensity distribution of the first light flux and the second light flux can be controlled.
  • the exit pupil can be shared, the entire illumination device can be made smaller, and the first light beam and the second light beam are emitted in various directions from the common light emitting surface, so that the light emitting surface is wide. There is also an advantage that it seems to emit light continuously in the range.
  • the illumination device includes a cover member that allows the first light beam emitted from the first optical system and the second light beam emitted from the second optical system to pass therethrough.
  • a cover member that allows the first light beam emitted from the first optical system and the second light beam emitted from the second optical system to pass therethrough.
  • the sum of the scattering performance of the first optical system and the cover member and the sum of the scattering performance of the second optical system and the cover member are Gaussian distributions ⁇ so as to satisfy the expressions (10) and (11).
  • the angle is 15 ° or less, loss of directivity can be suppressed, and beautiful gradation illumination such as monochromatic-mixed-monochromatic can be obtained.
  • the effect of making the irradiation area look beautiful is there.
  • the values of the expressions (14) and (15) are equal to or higher than the lower limit value, unevenness of the light source, for example, LED graininess, is reduced when the appearance quality is important such that the light emitting surface enters the field of view. And the appearance quality can be improved.
  • the cover member that also serves as the final exit surface is provided with a scattering performance of less than 10 ° with a Gaussian distribution ⁇ so that the expression (16) is satisfied, the irradiation area can be reflected beautifully and the contents of the apparatus cannot be seen.
  • the effects of the above and the like, and by balancing the irradiation, the aesthetics of the irradiation area and the lighting device itself can be improved.
  • the inside of the apparatus is difficult to see and the appearance is beautiful when the appearance quality is important such that the light emitting surface enters the field of view.
  • the scattering performance as described above can be obtained by roughening the surface of the optical system or the cover member. Or in the case of a cover member, you may make it milky white with the additive to a raw material.
  • FIG. 3 is a perspective view showing the illumination device 100 of the present embodiment, but shows the state in which the cover member 30 is removed.
  • the lighting device 100 includes an aluminum triangular cylindrical casing 101 preferably formed by extrusion molding, and side plates 102 attached to both ends of the casing 101.
  • One surface of the housing 101 is an opening 101a that is open over the entire longitudinal direction.
  • a first light source unit 10 and a second light source unit 20 are arranged.
  • FIG. 4 is a cross-sectional view of the configuration of FIG. 3 cut along a plane IV perpendicular to the longitudinal direction of the substrate of the light source unit.
  • the first light source unit 10 includes a reflector (first optical system) 11 having a groove in the same cross section extending in the longitudinal direction of the housing 101, an elongated aluminum heat radiating plate 12 installed at the bottom of the reflector 11, an aluminum It has a long and narrow substrate (first substrate) 13 disposed on the heat radiating plate 12 and a plurality of first LEDs (first light sources) 14 arranged in a row on the substrate 13.
  • the substrate 13 and the aluminum heat radiating plate 12 are tightly joined with a heat conductive front tape or the like, and assembled so as to be inserted into the housing 101 in the direction perpendicular to the paper surface.
  • the reflector 11 has a pair of curved reflecting surfaces 11a constituting the side surface of the groove, that is, has a condensing power in one direction.
  • the reflecting surface 11a can be roughened.
  • the first LED 14 has a blue emission color.
  • the second light source unit 20 is adjacent to and parallel to the first light source unit 10, and has a reflector (second optical system) 21 having a groove section with the same cross section extending over the longitudinal direction of the housing 101. And a plurality of second LEDs arranged in a row on the substrate 23, an elongated aluminum radiator plate 22 installed on the bottom of the substrate, an elongated substrate (second substrate) 23 disposed on the aluminum radiator plate 22. (Second light source) 24.
  • the substrate 23 and the aluminum heat radiating plate 22 are closely bonded with a heat conductive front tape or the like, and assembled so as to be inserted into the casing 101 in a direction perpendicular to the paper surface.
  • the reflector 21 has a pair of curved reflecting surfaces 21a constituting the side surface of the groove, that is, has a condensing power in one direction.
  • the reflecting surface 21a can be roughened.
  • the second LED 24 has a red emission color.
  • the reflectors 11 and 21 are a part of the housing 101, but may be separated.
  • a cover member 30 having an arcuate cross section is provided so as to shield the opening 101a of the housing 101.
  • the cover member 30 may have a diffusion function. It is preferable to satisfy the following formula.
  • a diffusion sheet DF may be disposed between the reflectors 11 and 21 and the cover member 30 as indicated by a dotted line in FIG.
  • ⁇ a scattering performance of the reflector 11
  • ⁇ b scattering performance of the reflector 21
  • ⁇ c scattering performance of the cover member 30
  • the following equation is satisfied. 2 ⁇ ⁇ a ⁇ 10 (°) (14) 2 ⁇ ⁇ b ⁇ 10 (°) (15) 2 ⁇ ⁇ c ⁇ 10 (°) (17)
  • the first LED 14 and the second LED 24 are attached at different angles. Therefore, the highest intensity peak beam (generally the center line) LB1 emitted from the first LED 14 is emitted in the normal direction of the emission surface of the first LED 14, and the highest intensity emitted from the second LED 24.
  • the high peak light beam LB2 is emitted in the normal direction of the emission surface of the second LED 24, the light beams LB1 and LB2 cross on the cross section of FIG.
  • FIG. 5 is a cross-sectional view showing the lighting device 100 in use.
  • lighting device 100 is installed on floor surface FL with the opening side facing wall surface WL.
  • the first LED 14 and the second LED 24 are driven by a current supplied from a driver (not shown) to emit light.
  • the light emitted from the first LED 14 is collected by the reflecting surface 11a of the reflector 11, and is emitted to the outside in a state of being diffused through the cover member 30 to illuminate the wall surface WL with blue light.
  • the light emitted from the second LED 24 is collected by the reflection surface 21a of the reflector 21 and emitted to the outside in a state of being diffused through the cover member 30, and the wall surface WL (partly the ceiling surface CL) is red.
  • Illuminate with light Illuminate with light.
  • the emitted light from the first LED 14 and the emitted light from the second LED 24 are partially overlapped to form gradation illumination in which the color gradually changes in the vertical direction.
  • gradation illumination in which the color gradually changes in the vertical direction.
  • the lighting device according to the present embodiment can artificially create a color close to a natural scene.
  • the illumination device 100 when the illumination device 100 is irradiated from the lower side toward the wall surface WL, the distance from each light source to the wall surface is different, but the illumination device 100 is used.
  • PK1 peak intensity in the angular intensity distribution AD1 of the first light beam
  • PK2 in angular intensity distribution AD2 of the second light beam
  • the appropriate peak intensity can be set so as to be equal to (peak intensity), and thereby gradation illumination can be performed in a balanced manner on the projection surface such as the wall surface.
  • FIG. 6 is a diagram illustrating the relationship between the lighting device and the room to be used, which was used in the simulation of the example.
  • illumination from the wall surface WL of the house to the ceiling CL is assumed.
  • the height from the floor FL of the house to the ceiling CL is about 2500 mm.
  • a floor with a height of about 250 mm is provided on the floor surface FL, and the lighting device 100 is installed on a table parallel to the floor surface FL, so that two-color gradation illumination that is as small as possible from the wall surface WL to the ceiling CL is provided. It will be generated.
  • the angle intensity distribution the angle toward the wall surface WL parallel to the floor surface FL is 0 °, the side toward the ceiling CL in the vertical direction from the lighting device 100 is + 90 °, and the direction toward the floor surface FL is ⁇ 90. °.
  • Necessary specifications change in the irradiation area, and the change in the light collecting function by the reflector, the number of the first LEDs, the number of the second LEDs, and the like change, and the illumination size changes within the scope of the present invention.
  • the chromaticity of the first LED and the second LED for the convenience of simulation software, the emission color is controlled by the wavelength and the simulation is performed.
  • the shape of the following embodiment is a bar shape, it may be a donut shape or the like with a cross section of the same shape.
  • a device that illuminates the ceiling may be used.
  • the optical system has an extruded shape (power in one axial direction), but may have power in a plurality of axial directions, and has a condensing function in at least one axial direction.
  • Example 1 is a cross-sectional view of the lighting apparatus according to the first embodiment.
  • it has 1st LED14, the board
  • the lighting device of the first embodiment has a bar-shaped casing 101 having a height H and a width W of about 30 mm and a length of about 140 mm. Both the first LED 14 and the second LED 24 have 16 LEDs. Are arranged at a pitch of 6.4 mm in the longitudinal direction (perpendicular to the paper surface), both emission surfaces are flat, the first LED emits blue light with a wavelength of 470 nm, and the second LED emits red light with a wavelength of 640 nm. Each of the reflectors 11 and 21 has a curved surface.
  • the reflectors 11 and 21 are grooves having the same cross-sectional shape extending in the longitudinal direction, have optical power in the height direction, and have a uniform longitudinal cross-section.
  • the reflecting surface is set as a slight scattering surface ( ⁇ 2) in consideration of actual manufacturing.
  • ⁇ 2 a slight scattering surface
  • the scattering performance is preferably set to ⁇ ⁇ 15 ° by the optical system.
  • the cover member 30 provided in the opening 101a of the housing 101 has a diffusion function ( ⁇ 4) in the material itself, and serves to reduce the graininess of the LEDs 14 and 23 and to eliminate unevenness of the irradiation surface. Even if a diffusion sheet or the like is disposed between the reflectors 11 and 21 and the opening 101a, the same effect can be obtained. However, by providing the cover member 30 with the function, the diffusion sheet or the like can be omitted and can be easily assembled. I can do it. A method of mixing particles or the like into the cover member 30 itself serving as the light emitting surface to have a diffusion function, or making the inside and outside rough surfaces can be appropriately selected in consideration of design properties and optical performance.
  • the ray diagram of the first LED 14 in increments of NA10 is as shown in FIG.
  • the luminous flux hitting the reflector for the first LED 14 is set to be absorbed by the surface.
  • the position of the terminal end of the reflector is designed so that a part of the light beam of the NA 30 not hitting the reflector 11 for the first LED 14 does not hit the floor side reflector for the second LED 24.
  • the ceiling-side reflector end portion for the first LED 14 is designed so as not to hit the luminous flux of the first LED 24.
  • the reflectors on the floor side of the first LED 14 and the ceiling side of the second LED 24 are in contact with each other for the purpose of space saving, and the length thereof is shorter than the reflectors that are not in contact with each other.
  • FIG. 9 is an angular intensity distribution diagram in the cross section of FIG. 6, where the vertical axis indicates the emission intensity, and the horizontal axis is the angle defined in FIG. 5. This is the result of first adjusting the emission intensity of the LEDs to 1 lm and adjusting the peak illuminance ratio at the wall surface 30 or 60 cm ahead to be approximately 1: 1.
  • the angular intensity distribution in the light beam emitted from the first LED 11 and collected by the reflector 11 is AD1
  • the angular intensity distribution in the light beam emitted from the second LED 21 and collected by the reflector 21 is AD2.
  • the angular intensity distribution in the light beam emitted from the first LED 11 when there is no reflector 11 is AD1L
  • the angular intensity distribution in the light beam emitted from the second LED 21 when there is no reflector 21 Is AD2L.
  • the intersection CP1 of the angular intensity distributions AD1 and AD2 is one point, that is, the angular position PCS is one point.
  • the expressions (4) and (5) are satisfied, respectively.
  • PS2 ⁇ PS1 40 °
  • the expression (7) is satisfied.
  • FIG. 10 shows a part of the chromaticity distribution of the color gradation. This is a chromaticity distribution from the floor to the ceiling through the illuminance peak value on the irradiated surface (the brightest place on the irradiated surface), and is the direction in which the color gradation changes.
  • the color gradation is generated from the wall surface to the ceiling surface in a general house with the light emitting surface of the lighting device facing the wall surface.
  • a chromaticity distribution diagram is shown when the wall is separated from the wall surface by about 60 cm (the chromaticity distribution diagram at each distance can be obtained from the angular intensity distribution for each LED in FIG. 9).
  • the evaluation surface size is 2700 mm ⁇ 2500 mm (floor to ceiling direction ⁇ width), and the chromaticity is expressed every 10 ⁇ 10 mm.
  • the result is a blue-red gradation on the wall from the floor to the ceiling.
  • the inclination of the graph indicates the degree of color change, and the inclination is larger and clearer than in other examples described later. Having an area where chromaticity changes and an area where chromaticity does not exist, and appropriately adjusting the slope of the graph for each color combination is important for creating a beautiful gradation.
  • the position of the intersection and the peak angle position The difference is an important parameter that controls them.
  • FIG. 11 is a cross-sectional view of the illumination device of the second embodiment.
  • the first LED 14, the reflector 11, the substrate 13, and the lens 15 are provided as the first light source unit
  • the second LED 24, the reflector 21, the substrate 23, and the lens are provided as the second light source unit. 25.
  • the illuminating device of Example 2 has a bar-shaped housing having a height of about 30 mm, a width of about 20 mm, and a length of about 140 mm.
  • Both the first LED 14 and the second LED 24 have 16 LEDs, They are arranged in the longitudinal direction (perpendicular to the paper surface) at a pitch of 6.4 mm, the emission surfaces are both flat, the first LED emits blue light with a wavelength of 470 nm, and the second LED emits red light with a wavelength of 640 nm.
  • a diffusion portion 30a made up of a plurality of parallel grooves is formed in a part of the flat cover member 30 (the transmission portion of the emitted light beam from the second LED 24).
  • the functions of the reflectors 11 and 21 are the same as those in the first embodiment.
  • the reflector 11 has a reflecting surface 11b for directing the emitted light beam from the first LED 14 downward in FIG.
  • the lenses 15 and 25 are designed so that the lens portion has a cylindrical shape, has power in one direction as in the case of the reflectors 11 and 21, and more condenses light with a small NA. The size can be reduced and the size in the height and width direction can be reduced.
  • the reflectors 11, 21 and lenses 15, 25 are both designed to have a positive optical power.
  • the lenses 15, 25 may be negative lenses, and together with the reflectors 11, 21, If the spread of the light beam is narrower than the Lambertian distribution of the single LED, it can be said that the optical system has a condensing function.
  • One of the side surfaces of the lenses 15 and 25 may be a bowl-shaped leg portion, and may be assembled by being inserted from a direction perpendicular to the paper surface into a groove of the housing 101 that is preferably formed by extrusion molding of aluminum.
  • the substrates 13 and 23 can be fixed by bringing the parts 15a and 25a of the lenses 15 and 25 into contact with the substrates 13 and 23.
  • the substrates 13 and 23 are attached to the housing 101 with double-sided tape, and then fixed with the lenses 15 and 25.
  • FIG. 12 is an angular intensity distribution diagram in the cross section of FIG. 6, where the vertical axis indicates the emission intensity, and the horizontal axis is the angle defined in FIG. 5. Conditions and the like are the same as in the first embodiment.
  • the angular intensity distribution in the light beam emitted from the first LED 11 and collected by the reflector 11 is AD1
  • the angular intensity distribution in the light beam emitted from the second LED 21 and collected by the reflector 21 is AD2.
  • the intersection CP1 of the angular intensity distributions AD1 and AD2 is one point, that is, the angular position PCS is one point.
  • FIG. 13 shows a part of the chromaticity distribution of the color gradation of Example 2.
  • the conditions are the same as in the first embodiment. Compared with the first embodiment, the gradation change region is long and the inclination is gentle. That is, the condition is such that the color transition can be recognized in a wider range.
  • FIG. 14 is a cross-sectional view of the illumination device of the third embodiment.
  • it has 1st LED14, the board
  • the lighting device of Example 3 has a bar-shaped housing (not shown) having a height of about 20 mm, a width of about 20 mm, and a length of about 140 mm, and there are 16 pieces of both the first LED 14 and the second LED 24. LEDs are arranged at intervals of 6.4 mm in the longitudinal direction (perpendicular to the paper surface), both emission surfaces are flat, the first LED is red with a wavelength of 640 nm, and the second LED is blue with a wavelength of 470 nm.
  • the emission colors are as follows.
  • the cover member 30 is formed by bending a flat plate into an L-shaped cross section, and a region 31 that transmits the emitted light beam of the first LED 14 and a region 32 that transmits the emitted light beam of the second LED 24. It has.
  • the cover member 30 has a diffusion function inside, and has a role of reducing the graininess of the LEDs 14 and 23 viewed from the outside and eliminating the unevenness of the irradiated surface. Even if a diffusion sheet or the like is arranged between the reflectors 11 and 21 to the cover member 30, the same effect can be obtained. However, by providing the cover member 30 with the function, the diffusion sheet and the like can be omitted, and the assemblability is improved. To do. A method of mixing particles or the like into the cover member 30 itself as the light emitting surface to have a diffusion function, or roughening the inside and outside can be selected as appropriate in consideration of design properties and optical performance.
  • the central reflecting surface of the reflectors 11 and 21 between the LEDs 14 and 23 extends longer than the reflecting surface facing it, so that the light beams emitted from the respective LEDs 14 and 23 are emitted.
  • a mixed region AR1 in FIG. 15 to be described later
  • a single color region AR2 in FIG. 15
  • the opposing reflecting surfaces are short in order to satisfy the minimum optical performance and to reduce the size.
  • a light flux of less than 5% is mixed with respect to the peak intensity, it is regarded as a single color region having only a single color light flux.
  • the cover member 30 divides the region 31 that transmits the light beam emitted from the first LED 14 and the region 32 that transmits the light beam emitted from the second LED 24.
  • the cover member 30 divides the region 31 that transmits the light beam emitted from the first LED 14 and the region 32 that transmits the light beam emitted from the second LED 24.
  • FIG. 15 is an angular intensity distribution diagram in the cross section of FIG. 6, where the vertical axis indicates the emission intensity, and the horizontal axis is the angle defined in FIG. 5. Conditions and the like are the same as in the first embodiment.
  • the angular intensity distribution in the light beam emitted from the first LED 11 and collected by the reflector 11 is AD1
  • the angular intensity distribution in the light beam emitted from the second LED 21 and collected by the reflector 21 is AD2.
  • the intersection CP1 of the angular intensity distributions AD1 and AD2 is one point, that is, the angular position PCS is one point.
  • the intensity SK1 3.8 at the angular position PS2
  • the intensity SK2 6.2 at the angular position PS1
  • PS2 ⁇ PS1 35 °, the expression (7) is satisfied.
  • FIG. 16 shows a part of the color gradation chromaticity distribution of Example 3.
  • the conditions are the same as in the first embodiment. Compared with the first and second embodiments, the gradation change area is longer and the inclination is more gentle, so the gradation is very relaxed. In other words, the condition is such that the color transition can be recognized in a relaxed manner over a wider range.
  • FIGS. 17 (a) and 17 (b) are diagrams in which the irradiation area created by the light beam emitted from the optical system in FIG.
  • FIG. 17A shows the state of the irradiation area when LM1 to LM3 as LEDs are A color and LM4 and LM5 are B color
  • FIG. 17B shows LM1 and LM2 are A color
  • the state of the irradiation area when LM3 to LM5 are the B color is shown.
  • the bar shape is raised, but it is also possible to realize an annular (doughnut) shape or a wavy shape like a snake.
  • the optimum conditions for the gradation change region and the change method differ depending on the irradiated surface and the color of light emitted. It is necessary to tune to the specifications. It can be easily imagined that the shape (expansion) of the angular intensity distribution of each LED group changes depending on the condition of the surface to be irradiated, and that the size changes accordingly.
  • FIG. 18A is a cross-sectional view similar to FIG. 2 according to another embodiment, omitting the substrate and the optical system.
  • FIG. 18B is a view similar to FIG. 17 according to the present embodiment, but shown in a three-color lighting state.
  • the light source LED 1 emits yellow outgoing light
  • the light source LED 2 adjacent to the light source LED 1 emits blue outgoing light
  • the light source LED 3 adjacent to the light source LED 2 emits red outgoing light.
  • the first light source and the second light source correspond to the light source LED 1 and the light source LED 2 when only the light source LED 3 is turned off (the red illumination in FIG. 18B is turned off), and only the light source LED 1 is turned off.
  • the light source LED2 and the light source LED3 correspond to (the yellow illumination in FIG. 18B is turned off), and when only the light source LED2 is turned off (the blue illumination in FIG. 18B is turned off), the light source LED1 and the light source LED3 correspond to each.
  • the first light source and the second light source of the present invention can be obtained by satisfying the above equations (1) to (9).
  • this is applied to the case of four light sources (not shown), when the central two light sources are turned off, the two light sources that are lit at both ends are included in the scope of the present invention by satisfying this conditional expression. It is. The same applies to five or more cases.
  • beautiful gradation illumination can be realized by simultaneously emitting three or more light sources that satisfy the above formulas (1) to (9) in all combinations.
  • beautiful gradation illumination can be realized by turning on only two light sources so as to satisfy the expressions (1) to (9).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)

Abstract

L'invention concerne un dispositif d'éclairage ne comportant aucune partie mobile, de petite taille, et pouvant parvenir à un excellent éclairage de gradation sur une grande surface sans en compromettre l'esthétique. S'étendant approximativement en parallèle se trouvent les axes de direction longs d'un premier substrat sur lequel sont montées de premières sources de lumière permettant d'émettre un premier flux de lumière et d'un second substrat sur lequel sont montées de secondes sources de lumière permettant d'émettre un second flux de lumière. La chromaticité du premier flux de lumière et la chromaticité du second flux de lumière sont différentes. Le dispositif d'éclairage satisfait aux formules suivantes quand les distributions d'intensité angulaire respectives pour le premier flux de lumière émis par un premier système optique et pour le second flux de lumière émis par un second système optique sont acquises dans un plan qui est orthogonal à l'axe du premier substrat ou du second substrat : PS1 < PCS < PS2 (1) 0,2 ≤ SCS/PK1 ≤ 0,9 (2) 0,2 ≤ SCS/PK2 ≤ 0,9 (3) où PS1 représente la position angulaire à laquelle l'intensité est la plus haute dans le premier flux de lumière, PK1 représente l'intensité à cette position, PS2 représente la position angulaire à laquelle l'intensité est la plus haute dans le second flux de lumière, PK2 représente l'intensité à cette position, PCS représente la position angulaire d'une intersection des distributions d'intensité angulaire du premier flux de lumière et du second flux de lumière, et SCS représente l'intensité à cette position.
PCT/JP2015/051970 2014-02-19 2015-01-26 Dispositif d'éclairage WO2015125557A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016504011A JPWO2015125557A1 (ja) 2014-02-19 2015-01-26 照明装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-029129 2014-02-19
JP2014029129 2014-02-19

Publications (1)

Publication Number Publication Date
WO2015125557A1 true WO2015125557A1 (fr) 2015-08-27

Family

ID=53878071

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/051970 WO2015125557A1 (fr) 2014-02-19 2015-01-26 Dispositif d'éclairage

Country Status (2)

Country Link
JP (1) JPWO2015125557A1 (fr)
WO (1) WO2015125557A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018141840A (ja) * 2017-02-27 2018-09-13 シチズン時計株式会社 照明装置
US10237951B1 (en) 2017-11-06 2019-03-19 Osram Sylvania Inc. Solid-state luminaire for creating color gradients

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004247147A (ja) * 2003-02-13 2004-09-02 Toshiba Lighting & Technology Corp 照明器具
JP2008098088A (ja) * 2006-10-16 2008-04-24 Mirai:Kk 広域照明装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004247147A (ja) * 2003-02-13 2004-09-02 Toshiba Lighting & Technology Corp 照明器具
JP2008098088A (ja) * 2006-10-16 2008-04-24 Mirai:Kk 広域照明装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018141840A (ja) * 2017-02-27 2018-09-13 シチズン時計株式会社 照明装置
US10237951B1 (en) 2017-11-06 2019-03-19 Osram Sylvania Inc. Solid-state luminaire for creating color gradients
WO2019090208A1 (fr) * 2017-11-06 2019-05-09 Osram Sylvania Inc. Luminaire à semi-conducteurs pour créer des gradients de couleur

Also Published As

Publication number Publication date
JPWO2015125557A1 (ja) 2017-03-30

Similar Documents

Publication Publication Date Title
US9366410B2 (en) Reverse total internal reflection features in linear profile for lighting applications
US9494293B2 (en) Troffer-style optical assembly
US8905575B2 (en) Troffer-style lighting fixture with specular reflector
EP1740879B1 (fr) Arrangement de lampes et réflecteurs pour mélange de couleurs
JP7182608B2 (ja) 制御されたバックライト配光を行うハイブリッドレンズ
JP5186526B2 (ja) 照明装置
US10323824B1 (en) LED light fixture with light shaping features
US7866845B2 (en) Optical device for mixing and redirecting light
US10794572B2 (en) LED troffer fixture having a wide lens
US20120051028A1 (en) Lighting device
US11079079B2 (en) Troffer light fixture
US9632295B2 (en) Flood optic
TWI633255B (zh) 光照系統及光照方法
KR100991890B1 (ko) 엘이디를 이용한 조명 모듈
WO2015125557A1 (fr) Dispositif d&#39;éclairage
WO2012107863A1 (fr) Procédé de mélange de couleurs
US20190211975A1 (en) Bulbs with indirect illumination
TWM552229U (zh) 車輛輔助照明燈具
JP2006260947A (ja) 固体発光式照明装置及びスポットライト

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15752324

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016504011

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15752324

Country of ref document: EP

Kind code of ref document: A1