WO2016013512A1 - 面照明体 - Google Patents
面照明体 Download PDFInfo
- Publication number
- WO2016013512A1 WO2016013512A1 PCT/JP2015/070544 JP2015070544W WO2016013512A1 WO 2016013512 A1 WO2016013512 A1 WO 2016013512A1 JP 2015070544 W JP2015070544 W JP 2015070544W WO 2016013512 A1 WO2016013512 A1 WO 2016013512A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- guide plate
- light guide
- light
- frame member
- polymer
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V15/00—Protecting lighting devices from damage
- F21V15/01—Housings, e.g. material or assembling of housing parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/12—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to the light guide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
-
- 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
- F21Y2105/00—Planar light sources
- F21Y2105/10—Planar light sources comprising a two-dimensional 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
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to a surface illuminator that emits light by making light from a light source incident on an incident end face of a light guide plate.
- a surface illuminator that emits light from a light source to an incident end face of a light guide plate as a lighting device that illuminates and displays the surface of a positive image film in a display device that displays and displays a pattern drawn on the positive image film.
- An LED light source with high power consumption may be mounted on a surface illuminator used in such applications in order to obtain as high luminance as possible.
- the light guide plate made of synthetic resin may expand and contract due to a temperature rise caused by heat generation when the light source is turned on, a temperature drop caused when the light source is turned off, or the like. Further, similar expansion / contraction may occur when the temperature and humidity at the installation location of the surface illumination body fluctuate. At this time, if the incident end surface of the light guide plate comes close to the light source due to the expansion of the light guide plate, and further the incident end surface presses the light source, there is a risk of lighting failure or damage of the light source.
- a light source holder that holds the light source is fixed in the vicinity of the incident end face of the light guide plate, and when the light guide plate expands / contracts, it is together with the incident end face.
- a surface illuminator configured so that the light source can move has been proposed (see, for example, Patent Document 1).
- the cross-section is substantially the outer periphery of a polymer in which a light guide, a light diffusion plate, a plate portion extending from a light source holder, and the like are superimposed on a base plate as a polymerization base.
- a U-shaped frame is fitted, and the polymer is integrated by screwing over the frame.
- the influence on the light source due to the expansion of the light guide plate is suppressed by suppressing the variation in the distance between the incident end surface and the light source by the integral movement of the light input plate and the light source plate.
- the expansion / contraction of the light guide plate not only fluctuates the distance between the incident end face and the light source, but may also apply a load to a fastening part such as a screw. And when such a load is too big
- An object of the present invention is to provide a surface illuminator in which influences on fastening portions and light sources due to expansion / contraction of a light guide plate are comprehensively suppressed.
- the invention according to claim 1, which achieves the above object, is a surface illuminator which emits light from a light source to an incident end face of a light guide plate and emits light, and a diffusion sheet and a milk half are provided on the surface side of the light guide plate.
- a fastening member that fastens the frame member in the thickness direction, and the frame member is opposed to the incident end face and is provided with a facing surface portion provided with a light source, and is continuous with the facing surface portion of one of the polymers.
- a first side surface portion extending along a surface, and a second side surface portion continuous with the opposing surface portion and extending along the other surface of the polymer.
- the invention according to claim 2 is the surface illumination body according to claim 1, wherein the light guide plate is a rectangular plate that expands and contracts according to at least one of temperature change and humidity change, and the fastening is performed.
- the member is disposed in the vicinity of the corner of the light guide plate, and moves diagonally in the diagonal direction of the light guide plate according to the expansion / contraction of the light guide plate, and the frame member is in the diagonal movement of the fastening member,
- the guide hole moves in the orthogonal direction according to the movement of the component in the orthogonal direction with respect to the incident end face, and the guide hole guides the movement of the component in the parallel direction with respect to the incident end face in the oblique movement of the fastening member.
- the invention according to claim 3 is the surface illumination body according to claim 1 or 2, wherein the fastening member penetrates the first side surface portion, the second side surface portion, and the polymer. And a nut screwed into the through screw, and the through screw moves in the guide hole.
- the guide hole is a long hole formed along the longitudinal direction of the frame member. It is configured.
- the invention according to claim 5 is the surface illuminator according to any one of claims 1 to 4, wherein the surface light emission is double-sided light emission, and one of the light guide plates and the other surface are both It is characterized in that the polymer is constituted by superposing milk halves with at least one diffusion sheet or space interposed therebetween.
- the invention according to claim 6 is the surface illuminator according to any one of claims 1 to 4, wherein the surface light emission is single-sided light emission, and a diffusion sheet and one surface of the light guide plate are provided. At least one of the milk half-plates is overlapped, and a reflection sheet is overlapped on the other surface of the light guide plate to form the polymer, and the reflection sheet is guided to the opposite side of the reflection sheet from the light guide plate. A plate member to be pressed against the other surface of the optical plate is overlapped, and an insertion hole for inserting the fastening member with a margin is formed in the plate member.
- the frame member is provided on the edge of the polymer including the incident end face of the light guide plate. For this reason, with respect to the orthogonal component orthogonal to the incident end face in the expansion / contraction of the light guide plate, the frame member can move together in the direction perpendicular to the incident end face of the light guide plate.
- the relative displacement between the light guide plate and the frame member due to the expansion / contraction of the light guide plate is absorbed by guiding the fastening member along the longitudinal direction of the frame member by the guide hole. can do. Thereby, the load to a fastening location is suppressed also about the parallel component along the incident end surface in expansion / contraction of a light-guide plate.
- the frame member can move following the orthogonal component of expansion / contraction, so the distance between the light source provided on the opposing surface portion of the frame member and the incident end surface of the light guide plate can be reduced. Variation can be suppressed. As a result, the light source can be prevented from being damaged, and the light emission state can be satisfactorily maintained by stable incident light.
- the base plate provided in the surface illumination body described in Patent Document 1 described above can be made unnecessary, it is possible to promote simplification and thinning of the structure. .
- each of the components in both the orthogonal direction and the parallel direction with respect to the incident end surface in the oblique movement of the fastening member disposed in the vicinity of the corner of the light guide plate can be applied to the fastening location or the light source. The influence can be suppressed reliably.
- the polymer and the frame member can be easily and reliably fastened by screwing the through screw and the nut. Moreover, the load to a fastening location can be reliably suppressed by the movement in the guide hole of a penetration screw.
- the movement of the fastening member in the direction orthogonal to the longitudinal direction of the guide hole constituted by the long hole is restricted.
- the followability of the frame member (that is, the light source) to the orthogonal component with respect to the incident end face in the expansion / contraction of the light guide plate is improved.
- the variation in the distance between the light source and the incident end face of the light guide plate can be further suppressed, so that the influence on the light source due to the expansion / contraction of the light guide plate can be further suppressed.
- the polymer in which the diffusion plate and the space between the milk halves are overlapped with the light guide plate is fastened and integrated together by the fastening member.
- the surface illumination body which emits milk color light with high versatility can be obtained.
- a diffusion sheet or space is arranged on both sides of the light guide plate, so that, for example, when a positive image film is superimposed on both sides of a surface illuminator, See-through from the other light emitting display to the screen is reduced.
- the fastening member is inserted through the insertion hole of the plate member with a margin, so that the relative displacement between the light guide plate and the plate member is absorbed even if the plate member is formed of, for example, an aluminum plate having a different expansion from the light guide plate. Thus, the load on the fastening part can be reduced.
- FIG. 2 is a sectional view showing an AA section in FIG. 1.
- FIG. 3 is a partial exploded perspective view of a polymer and a frame member in the surface illuminator shown in FIGS. 1 and 2. It is a figure which shows typically the mode of the movement of the corner vicinity of the light guide plate accompanying expansion and contraction of the light guide plate.
- FIG. 6 is a cross-sectional view showing a BB cross section in FIG. 5.
- FIG. 7 is a partial exploded perspective view of a polymer and a frame member in the surface illuminator shown in FIGS. 5 and 6.
- FIG. 1 is a front view of the surface illumination body according to the first embodiment of the present invention as viewed from the light emitting surface side.
- FIG. 2 is a cross-sectional view showing the AA cross section in FIG.
- FIG. 3 is a partially exploded perspective view of a polymer and a frame member in the surface illuminator shown in FIGS. 1 and 2.
- FIG. 4 is a diagram schematically illustrating the movement of the light guide plate in the vicinity of the corner accompanying the expansion / contraction of the light guide plate.
- the surface illuminator 1 shown in FIG. 1 is a rectangular plate-shaped illuminator that emits light on both sides with milky light.
- the surface illumination body 1 includes an LED unit 11, a polymer 12, a pair of frame members 13 provided along upper and lower end edges 12 a of the polymer 12, and the polymer 12 and the frame member 13.
- the LED unit 11 is one in which an LED 112 as a light source is mounted on a substrate 111 as shown in FIG.
- the substrate 111 is a strip-shaped substrate extending along the edge 12 a of the polymer 12, and the LEDs 112 are arranged in a row along the edge 12 a with the light exit opening directed toward the edge 12 a of the polymer 12. Is arranged.
- the polymer 12 is obtained by superposing a light guide plate 121 as a polymerization base, a diffusion sheet 122, and a milk half plate 123.
- the polymer 12 is configured by superimposing the milk half plates 123 on both sides of the light guide plate 121 with two diffusion sheets 122 interposed therebetween.
- the light guide plate 121 is a rectangular plate formed of a synthetic resin such as an acrylic resin having rigidity as a polymerization base.
- the light guide plate 121 is a plate having a thickness of about 5 mm.
- each of a pair of opposing edge in this light-guide plate 121 becomes the incident end surface 121a into which light injects from LED112.
- through holes 121 b are provided at four locations in the vicinity of the corners of the light guide plate 121.
- the diffusion sheet 122 is formed of, for example, a polyester-based synthetic resin, has a thickness of about 0.2 mm, and is a transparent or translucent rectangular sheet having a light diffusion function. As shown in FIG. 3, a through hole 122 a that communicates with the through hole 121 b of the light guide plate 121 is provided near the corner of the diffusion sheet 122.
- the milk half plate 123 is a milky white translucent rectangular plate having a thickness of about 2 mm made of a synthetic resin such as acrylic resin. As shown in FIG. 3, a through hole 123 a that communicates with the through hole 121 b of the light guide plate 121 is also provided near the corner of the milk half plate 123.
- the frame member 13 is provided along the edge 12 a of the polymer 12 including the incident end surface 121 a of the light guide plate 121.
- the frame member 13 has a facing surface portion 131, a first side surface portion 132, and a second side surface portion 133.
- the facing surface portion 131 faces the incident end surface 121a and is provided with the LED unit 11.
- the first side surface portion 132 is continuous with the opposing surface portion 131 and extends along one surface of the polymer 12, and the second side surface portion 133 is continuous with the opposing surface portion 131 and along the other surface of the polymer 12. It extends.
- the frame member 13 having these three surface portions has a substantially U-shaped cross section.
- the fastening member 14 fastens the polymer 12 and the frame member 13 in the thickness direction at both ends in the longitudinal direction of the frame member 13.
- the fastening member 14 includes a through screw 141 and a nut 142.
- FIGS. 2 and 3 between the first side surface 132 of the frame member 13 and one surface of the polymer 12 and the second side surface of the frame member 13.
- one spacer 15 having a thickness of about 1 mm is disposed.
- a through hole 15 a that communicates with the through hole 121 b of the light guide plate 121 is also provided near the corner of the spacer 15.
- the through hole 121b of the light guide plate 121, the through hole 122a of the diffusion sheet 122, the through hole 123a of the milk half plate 123, and the through hole 15a of the spacer 15 are all circular holes having a diameter slightly larger than the diameter of the through screw 141. It has become.
- the first side surface portion 132 and the second side surface portion 133 of the frame member 13 are inserted with the through screw 141 in the fastening member 14 and can guide the through screw 141 along the longitudinal direction of the frame member 13.
- a hole 134 is formed.
- the guide hole 134 is a long hole formed along the longitudinal direction of the frame member 13.
- the through screw 141 includes a guide hole 134 in the first side surface portion 132, a guide hole 134 in the second side surface portion 133, a through hole 121b in the light guide plate 121, a through hole 122a in the diffusion sheet 122, a through hole 123a in the milk half plate 123, And the through hole 15 a of the spacer 15. Then, the nut 142 is screwed into the through screw 141, whereby the polymer 12 and the frame member 13 are fastened in the thickness direction with the spacer 15 interposed therebetween.
- the light guide plate 121 formed of a synthetic resin such as acrylic resin may expand and contract due to temperature change and humidity change.
- the light guide plate 121 may expand and contract by about 0.7 mm per 1000 mm for every 10 ° C. temperature change.
- the humidity rises it may expand up to about 2 mm per 1000 mm due to water absorption.
- the temperature at which the surface illuminator 1 is exposed in the summer is 60 ° C.
- the temperature at which the surface illuminator 1 is exposed in the winter is ⁇ 10 ° C.
- the temperature change between the two is 70 ° C.
- the planar view shape of the light guide plate 121 is a rectangle having a horizontal size of 2000 mm and a vertical size of 600 mm.
- the light guide plate 121 expands and contracts evenly in the vertical direction
- FIG. 4 schematically shows the movement of the light guide plate 121 in the vicinity of the corner accompanying such expansion and contraction of the light guide plate 121.
- FIG. 4A shows the vicinity of a corner before expansion (or after contraction)
- FIG. 4B shows the vicinity of a corner after expansion (or before contraction).
- the light guide plate 121 expands and contracts
- the vicinity of the corner of the light guide plate 121 moves diagonally in the diagonal direction D1.
- the fastening member 14 (the through screw 141 and the nut 142) disposed in the vicinity of the corner also moves diagonally in the diagonal direction D1 together with the vicinity of the corner of the light guide plate 121.
- the frame member 13 is provided on the edge 12 a of the polymer 12 including the incident end surface 121 a of the light guide plate 121. Therefore, the component in the orthogonal direction D1-1 orthogonal to the incident end surface 121a in the oblique movement of the fastening member 14 accompanying the expansion / contraction of the light guide plate 121 (that is, the movement due to the vertical expansion / contraction as described above).
- the frame member 13 moves together with the incident end surface 121a (that is, the fastening member 14) of the light guide plate 121 in the orthogonal direction D1-1.
- the load on the fastening portion by the fastening member 14 is suppressed.
- the fastening member 14 (that is, the through screw 141 and the nut 142) is guided along the longitudinal direction (that is, the lateral direction) of the frame member 13 by the guide hole 134,
- the relative displacement between the light guide plate 121 and the frame member 13 due to the expansion / contraction of the light guide plate 121 can be absorbed.
- the component in the parallel direction D1-2 along the incident end surface 121a in the movement of the fastening member 14 accompanying the expansion / contraction of the light guide plate 121 (that is, the lateral expansion / contraction as described above) is also fastened.
- the load on the location can be suppressed.
- the through screw 141 accompanying such lateral expansion / contraction is provided.
- the amount of movement in the horizontal direction is about 6.9 mm.
- the outer diameter of the through screw 141 is 4.5 mm
- the through screw 141 moving in the lateral direction as described above can be sufficiently guided.
- the frame member 13 can move following the orthogonal component of expansion / contraction as described above, and thus the LED 111 of the LED unit 11 provided on the facing surface portion 131 of the frame member 13. And the distance between the incident end surface 121a of the light guide plate 121 can be suppressed. As a result, the LED 111 can be prevented from being damaged, and the light emission state can be satisfactorily maintained by stable incident light.
- the surface illuminator 1 of the present embodiment is a surface illuminator in which the influence on the fastening portion and the LED 111 due to the expansion / contraction of the light guide plate 121 is comprehensively suppressed. Moreover, in the surface illumination body 1 of this embodiment, the base board provided in the surface illumination body of the patent document 1 mentioned above becomes unnecessary, The simplification of the sentence, a structure, and thickness reduction are accelerated
- the fastening member 14 moves obliquely in the diagonal direction D1 according to the expansion / contraction of the light guide plate 121.
- the load on the fastening portion is reliably suppressed by the frame member 13 moving in the orthogonal direction D1-1.
- the guide hole 134 guides the movement of the fastening member 14 in the parallel direction D1-2, so that the load on the fastening portion can be reliably suppressed.
- the polymer 12 and the frame member 13 can be easily and reliably fastened by screwing the through screw 141 and the nut 142. And the load to a fastening location can be reliably suppressed by the movement in the guide hole 134 of the penetration screw 141.
- the guide hole 134 of each of the 1st side surface part 132 and the 2nd side surface part 133 of the frame member 13 was formed along the longitudinal direction of the frame member 13 as mentioned above. It is composed of long holes. Thereby, the movement of the through screw 141 in the direction orthogonal to the longitudinal direction of the guide hole 134 is restricted. Thereby, the followability of the frame member 13 (that is, the LED 112) to the orthogonal component with respect to the incident end surface 121a in the expansion / contraction of the light guide plate 121 is improved.
- the variation in the distance between the LED 112 and the incident end surface 121a of the light guide plate 121 can be further suppressed, and the influence on the LED 112 due to the expansion / contraction of the light guide plate 121 can be further suppressed.
- the polymer 12 on which the milk half plate 123 is overlapped with the diffusion sheet 122 sandwiched between the light guide plate 121 and the fastening member 14 are collectively fastened and integrated.
- the surface illumination body 1 which emits milk color light with high versatility can be obtained.
- the diffusion sheets 122 are arranged on both surfaces of the light guide plate 121, for example, when the positive image film is overlapped on both surfaces of the surface illuminator 1 and the pattern is light-emitting and displayed, the other light emission to one light-emitting display is performed. Show-through from the display is reduced.
- the diffusion sheet 122 may replace with said diffusion sheet 122 and may provide the space (namely, clearance gap) between the light-guide plate 121 and the milk half plate 123 in addition to the part of this diffusion sheet 122.
- FIG. Such a measure also reduces the show-through as described above.
- FIG. 5 is the front view which looked at the surface illumination body concerning 2nd embodiment of this invention from the light emission surface side.
- FIG. 6 is a cross-sectional view showing a BB cross section in FIG.
- FIG. 7 is a partially exploded perspective view of the polymer and the frame member in the surface illumination body shown in FIGS. 5 and 6.
- the surface illuminator 3 shown in FIG. 5 is a rectangular plate-shaped illuminator that emits light on one side with milky light.
- the surface illumination body 3 includes an LED unit 31, a polymer 32, a frame member 33 provided along an upper edge 32 a of the polymer 32 in the drawing, and a fastening that fastens the polymer 32 and the frame member 33. And a member 34.
- the LED unit 31 is one in which an LED 312 as a light source is mounted on a substrate 311 as shown in FIG.
- the polymer 32 of the present embodiment first has a light guide plate 321 equivalent to the light guide plate 121, the diffusion sheet 122, and the milk half plate 123 in the first embodiment.
- a diffusion sheet 322 and a milk half plate 323 are provided.
- one diffusion sheet 122 is stacked on one surface of the light guide plate 321
- the milk half plate 323 is stacked on the diffusion sheet 122.
- the milk half plate 323 side of the polymer 32 is the light emitting surface of the polymer 32, that is, the light emitting surface of the surface illumination body 3.
- a single-sided light emitting polymer As an example of a single-sided light emitting polymer, a form in which one diffusion sheet 122 and a milk half plate 323 are stacked on one surface of the light guide plate 321 is illustrated.
- the single-sided light emitting polymer is not limited to such a form, and for example, a form in which a diffusion sheet or a milk half plate is overlaid on one surface of the light guide plate may be used.
- the reflection sheet 324 is formed of, for example, a polyester-based synthetic resin, and is a white rectangular sheet having a thickness of about 0.2 mm and high reflectivity.
- the light incident on the incident end surface 321 a of the light guide plate 321 travels inside the light guide plate 321 while being reflected by the reflection sheet 324. Thereby, said light emission surface in the polymer 32 will light-emit.
- an aluminum plate 325 as a plate member that presses the reflection sheet 324 against the other surface of the light guide plate 321 is superimposed on the opposite side of the reflection sheet 324 from the light guide plate 321.
- the reflection sheet 324 is pasted on the aluminum plate 325 by gluing.
- Through holes 321b are provided at two locations in the vicinity of the two corners on the incident end face 321a side of the light guide plate 321.
- the diffusion sheet 322 is provided with a through hole 322 a that communicates with the through hole 321 b of the light guide plate 321, and the milk half plate 323 is also provided with a similar through hole 323 a.
- the reflection sheet 324 is also provided with a through hole 324 a communicating with the through hole 321 b of the light guide plate 321.
- the aluminum plate 325 is provided with a large-diameter through hole 325a having a larger diameter than these through-holes, as will be described later.
- the frame member 33 includes a facing surface portion 331, a first side surface portion 332, and a second side surface portion 333, and the cross-sectional shape is formed in a substantially U shape.
- the facing surface portion 331 is opposed to the incident end surface 321a and is provided with the LED unit 11.
- the first side surface portion 332 extends along the light emitting surface of the polymer 12 continuously to the facing surface portion 331, and the second side surface portion 133. Extends along the back surface of the polymer 12 continuously to the facing surface portion 331.
- the fastening member 34 includes a through screw 341 and a nut 342, similarly to the fastening member 14 of the first embodiment.
- a spacer 35 having a thickness of about 1 mm is provided between the first side surface portion 332 of the frame member 33 and one surface of the polymer 33.
- One is arranged.
- a through hole 35 a that communicates with the through hole 321 b of the light guide plate 321 is also provided near the corner of the spacer 35.
- the through hole 321 b of the light guide plate 321, the through hole 322 a of the diffusion sheet 322, the through hole 323 a of the milk half plate 323, and the through hole 35 a of the spacer 35 are all circular holes having a slightly larger diameter than the diameter of the through screw 341. It has become.
- the large-diameter through-hole 325a of the aluminum plate 325 is a circular hole having a larger diameter than these through-holes, that is, a large-diameter circular hole having a margin with respect to the diameter of the through-screw 341. It is an insertion hole for insertion.
- the 1st side surface part 332 and the 2nd side surface part 333 of the frame member 33 were comprised by the long hole similar to the guide hole 14 of 1st embodiment, as FIG.5 and FIG.7 showed.
- a guide hole 334 is formed.
- the through screw 341 includes a guide hole 334 in the first side surface portion 332, a guide hole 334 in the second side surface portion 333, a through hole 321 b in the light guide plate 321, a through hole 322 a in the diffusion sheet 322, a through hole 323 a in the milk half plate 323,
- the through hole 324a of the reflection sheet 324, the large diameter through hole 325a of the aluminum plate 325, and the through hole 35a of the spacer 35 are penetrated.
- the nut 342 is screwed into the through screw 341 so that the polymer 32 and the frame member 33 are fastened in the thickness direction with the spacer 35 interposed therebetween.
- the surface illuminator 3 of the second embodiment described above can suppress the influence on the fastening portion and the LED 312 due to the expansion / contraction of the light guide plate 321 comprehensively. Needless to say, it is a flat surface illuminator.
- the light guide plate 321 is a polymer base of the polymer 32, a base plate is not required, and the simplification and thinning of the structure can be promoted, and the through screw 341 and the nut 342 are screwed together.
- the point which can fasten the polymer 32 and the frame member 33 simply and reliably is the same as that of the surface illumination body 1 of 1st embodiment.
- the movement restriction of the through screw 341 in the orthogonal direction by the guide hole 334 improves the followability of the frame member 33 (that is, the LED 312) to the orthogonal component with respect to the incident end surface 321a in the expansion / contraction of the light guide plate 321.
- the point that the influence on the LED 312 due to the expansion / contraction of the light guide plate 321 can be further suppressed is similar to the surface illumination body 1 of the first embodiment.
- the polymer 32 which piled up the light-guide plate 321, the diffusion sheet 322, the milk half plate 323, the reflective sheet 324, and the aluminum plate 325 is fastened together with the fastening member 34, Integrated.
- the surface illumination body 3 of 2nd embodiment is comprised by the single-sided surface illumination body which emits milk-colored light with high versatility.
- the penetration screw 341 penetrates the large diameter through-hole 325a of the aluminum plate 325 with a margin, and thereby the aluminum plate 325 having a different expansion from the light guide plate 321 and its light guide plate The relative displacement of 321 can be absorbed and the load on the fastening point can be reduced.
- the diameter of the large-diameter through hole 325a of the aluminum plate 325 is the same as the length in the longitudinal direction of the guide hole 334 formed of a long hole.
- the diameter is about 11.4 mm.
- light sources LEDs
- the light source referred to in the present invention is not limited to this, and for example, the light source may be arranged in a plurality of rows along the incident end face in the thickness direction of the light guide plate.
- a double-sided surface illuminator in which a pair of opposing edges in a light guide plate having a rectangular plate shape is an incident end surface of light from a light source. 1 and 2 are illustrated.
- a single-sided surface illuminator 3 having one edge of a light guide plate having a rectangular plate shape as an incident end surface of light from a light source, 4 is illustrated.
- the surface illuminator referred to in the present invention is not limited to such a form, and may be a double-sided surface illuminator in which one edge of the light guide plate is an incident end surface of light from the light source, A single-sided surface illuminator may be used in which each of the pair of opposed edges of the light guide plate is an incident end surface of light from the light source.
- the guide holes 134 and 334 configured by long holes are exemplified as an example of the guide hole referred to in the present invention.
- the guide hole referred to in the present invention is not limited to this, and may be a shape other than a long hole such as an elliptical hole as long as the fastening member is inserted and the fastening member is a hole along the longitudinal direction of the frame member. There is no question about its specific shape.
- the fastening members 14 and 34 each having a through screw and a nut are illustrated as an example of the fastening member referred to in the present invention.
- the fastening member referred to in the present invention is not limited to these, and may be configured without using a screw such as a rivet as long as the polymer and the frame member are fastened in the thickness direction. It does not often ask about its specific composition.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
11,31 LEDユニット
12,32 重合体
12a,32a 端縁
13,33 枠部材
14,34 締結部材
15,35 スペーサ
111,311 基板
112,312 LED(光源)
121,321 導光板
121a,321a 入射端面
121b,122a,123a,15a,321b,322a,323a,324a,35a 貫通孔
122,322 拡散シート
123,323 乳半板
131,331 対向面部
132,332 第一側面部
133,333 第二側面部
134,334 案内孔
141,341 貫通ネジ
142,342 ナット
324 反射シート
325 アルミニウム板(板部材)
325a 大径貫通孔(挿通孔)
Claims (6)
- 導光板の入射端面に光源からの光を入射させて面発光する面照明体であって、
前記導光板の表面側に拡散シート及び乳半板の少なくとも一方を重ね合わせた重合体と、
前記導光板の前記入射端面を含む前記重合体の端縁に沿って設けられる枠部材と、
前記枠部材の長手方向両端部にて前記重合体と前記枠部材とを厚さ方向に締結する締結部材と、を備え、
前記枠部材は、前記入射端面に対向するとともに光源が設けられる対向面部と、該対向面部に連続し前記重合体の一方の面に沿って延びる第一側面部と、前記対向面部に連続し前記重合体の他方の面に沿って延びる第二側面部と、を有して断面略U字状に形成され、
前記第一側面部及び前記第二側面部には、前記締結部材を挿通させるとともに前記枠部材の長手方向に沿って前記締結部材を案内可能な案内孔が形成されていることを特徴とする面照明体。 - 前記導光板が、温度変化及び湿度変化のうちの少なくとも一方に応じて膨張・収縮する矩形板であり、
前記締結部材が、前記導光板のコーナー近傍に配置され、前記導光板の膨張・収縮に応じて該導光板の対角方向に斜めに移動し、
前記枠部材が、前記締結部材の斜めの移動における、前記入射端面に対する直交方向の成分の移動に応じて該直交方向に移動し、
前記案内孔が、前記締結部材の斜めの移動における、前記入射端面に対する平行方向の成分の移動を案内することを特徴とする請求項1記載の面照明体。 - 前記締結部材が、前記第一側面部、前記第二側面部、及び前記重合体を貫通する貫通ネジと、該貫通ネジに螺合するナットと、を有して構成されると共に、前記貫通ネジが前記案内孔内を移動することを特徴とする請求項1又は2に記載の面照明体。
- 前記案内孔は、前記枠部材の長手方向に沿って形成された長孔で構成されていることを特徴とする請求項1から3のうち何れか一項に記載の面照明体。
- 前記面発光が両面発光であり、
前記導光板の一方及び他方の両面に、それぞれ少なくとも1枚の拡散シートや空間を間に挟んで乳半板が重ね合わされて前記重合体が構成されていることを特徴とする請求項1から4のうち何れか一項に記載の面照明体。 - 前記面発光が片面発光であり、
前記導光板の一方の面に拡散シート及び乳半板の少なくとも一方が重ねられ、前記導光板の他方の面に反射シートが重ねられて前記重合体が構成され、
前記反射シートにおける前記導光板とは反対側に、前記反射シートを前記導光板の前記他方の面に押し付ける板部材が重ねられ、該板部材には、前記締結部材を余裕をもって挿通させる挿通孔が形成されていることを特徴とする請求項1から4のうち何れか一項に記載の面照明体。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020177000842A KR20170065483A (ko) | 2014-07-25 | 2015-07-17 | 면조명체 |
CN201580040131.5A CN106662301A (zh) | 2014-07-25 | 2015-07-17 | 面照明体 |
US15/328,613 US20170212299A1 (en) | 2014-07-25 | 2015-07-17 | Surface lighting assembly |
EP15825135.5A EP3173678A4 (en) | 2014-07-25 | 2015-07-17 | Surface lighting body |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2014151676A JP6348794B2 (ja) | 2014-07-25 | 2014-07-25 | 面照明体 |
JP2014-151676 | 2014-07-25 |
Publications (1)
Publication Number | Publication Date |
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WO2016013512A1 true WO2016013512A1 (ja) | 2016-01-28 |
Family
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2015/070544 WO2016013512A1 (ja) | 2014-07-25 | 2015-07-17 | 面照明体 |
Country Status (7)
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US (1) | US20170212299A1 (ja) |
EP (1) | EP3173678A4 (ja) |
JP (1) | JP6348794B2 (ja) |
KR (1) | KR20170065483A (ja) |
CN (1) | CN106662301A (ja) |
TW (1) | TWI582332B (ja) |
WO (1) | WO2016013512A1 (ja) |
Cited By (1)
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JP2017157483A (ja) * | 2016-03-03 | 2017-09-07 | パナソニックIpマネジメント株式会社 | 照明器具 |
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JP6600577B2 (ja) * | 2016-02-12 | 2019-10-30 | 株式会社nittoh | 照明装置 |
KR102380884B1 (ko) * | 2017-09-11 | 2022-03-31 | 삼성전자주식회사 | 디스플레이 모듈 및 이를 갖는 디스플레이 장치 |
CN109581741A (zh) * | 2018-12-13 | 2019-04-05 | 惠州市华星光电技术有限公司 | 一种背光结构及液晶显示屏 |
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- 2014-07-25 JP JP2014151676A patent/JP6348794B2/ja not_active Expired - Fee Related
-
2015
- 2015-07-17 US US15/328,613 patent/US20170212299A1/en not_active Abandoned
- 2015-07-17 CN CN201580040131.5A patent/CN106662301A/zh active Pending
- 2015-07-17 EP EP15825135.5A patent/EP3173678A4/en not_active Withdrawn
- 2015-07-17 WO PCT/JP2015/070544 patent/WO2016013512A1/ja active Application Filing
- 2015-07-17 KR KR1020177000842A patent/KR20170065483A/ko unknown
- 2015-07-23 TW TW104123853A patent/TWI582332B/zh not_active IP Right Cessation
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KR20170065483A (ko) | 2017-06-13 |
US20170212299A1 (en) | 2017-07-27 |
TW201610341A (zh) | 2016-03-16 |
JP2016029618A (ja) | 2016-03-03 |
EP3173678A1 (en) | 2017-05-31 |
TWI582332B (zh) | 2017-05-11 |
EP3173678A4 (en) | 2017-10-18 |
JP6348794B2 (ja) | 2018-06-27 |
CN106662301A (zh) | 2017-05-10 |
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