WO2021054377A1 - Élément de commande de flux lumineux, dispositif électroluminescent, appareil de source de lumière de surface et appareil d'affichage - Google Patents

Élément de commande de flux lumineux, dispositif électroluminescent, appareil de source de lumière de surface et appareil d'affichage Download PDF

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Publication number
WO2021054377A1
WO2021054377A1 PCT/JP2020/035147 JP2020035147W WO2021054377A1 WO 2021054377 A1 WO2021054377 A1 WO 2021054377A1 JP 2020035147 W JP2020035147 W JP 2020035147W WO 2021054377 A1 WO2021054377 A1 WO 2021054377A1
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WIPO (PCT)
Prior art keywords
control member
flux control
luminous flux
light
optical surface
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PCT/JP2020/035147
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English (en)
Japanese (ja)
Inventor
将輝 野上
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株式会社エンプラス
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Publication of WO2021054377A1 publication Critical patent/WO2021054377A1/fr

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    • 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
    • F21V5/00—Refractors for light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements

Definitions

  • the present invention relates to a luminous flux control member that controls the light distribution of light emitted from a light emitting element.
  • the present invention also relates to a light emitting device having the luminous flux control member, a surface light source device having the light emitting device, and a display device having the surface light source device.
  • a transmissive image display device such as a liquid crystal display device
  • a direct type surface light source device having a plurality of light emitting elements as a light source has been used in recent years.
  • Patent Document 1 discloses a lighting device used for a direct type surface light source device.
  • FIG. 1A is a perspective view of the lighting device 10 described in Patent Document 1
  • FIG. 1B is a cross-sectional view of the lighting device 10 described in Patent Document 1.
  • a plurality of optical modules 20 are arranged in a matrix (lattice), and support pins 30 are arranged between the optical modules 20. Has been done.
  • the optical module 20 has an LED 21 and a diffusing lens 22, and the diffusing lens 22 is arranged so as to cover the LED 21.
  • a diffuser plate is arranged on the lighting device 10 to diffuse the light from the optical module 20.
  • the support pin 30 is for supporting the diffuser plate when the diffuser plate is arranged on the lighting device 10. By supporting the diffuser plate arranged on the illumination device 10 by the support pin 30, a gap can be secured between the diffuser lens 22 and the diffuser plate. As a result, the diffuser plate and the diffuser lens 22 can be prevented from coming into contact with each other.
  • the support pins 30 provided between the optical modules 20 support the diffuser plate so that the diffuser plate and the diffuser lens 22 do not come into contact with each other.
  • the diffusing plate when the diffusing plate is bent, the diffusing lens 22 (luminous flux control member) and the diffusing plate (light diffusing plate) come into contact with each other, and the light from the light source cannot be diffused as desired. is there.
  • the distance between the optical module 20 and the diffuser plate (light diffuser plate) is required to be closer. In such a case, even if the diffuser plate (light diffuser plate) is slightly bent, the diffuser lens 22 (luminous flux control member) and the diffuser plate (light diffuser plate) may come into contact with each other.
  • the present invention has been made in view of the above circumstances, and a light flux control member capable of suppressing contact between the light diffuser plate and the optical surface of the light flux control member even when the light diffuser plate is bent is provided.
  • the purpose is to provide.
  • Another object of the present invention is to provide a light emitting device, a surface light source device, and a display device having the above-mentioned luminous flux control member.
  • the luminous flux control member is a luminous flux control member for controlling the light distribution of light emitted from a light emitting element, which is used in a surface light source device having a light diffuser plate, and is on the back side of the luminous flux control member.
  • the first optical surface for incident the light emitted from the light emitting element into the inside of the luminous flux control member and the front side of the luminous flux control member are arranged and incident on the first optical surface.
  • a second optical surface for transmitting or reflecting the light is transmitted, and a support protrusion for supporting the light diffusing plate, which is arranged on the front side of the luminous flux control member, and a back side of the luminous flux control member are arranged.
  • the leg portion closest to the support protrusion among the leg portions is arranged on a line passing through the support protrusion and the central axis.
  • the light emitting device includes a light emitting element and a light flux control member according to the present invention arranged on the light emitting element.
  • the surface light source device includes a light emitting device according to the present invention and a light diffusing plate that diffuses and transmits light emitted from the light emitting device, and the support protrusion is attached to the light diffusing plate. Are in contact.
  • the display device includes a surface light source device according to the present invention and a display member that is irradiated with light emitted from the surface light source device.
  • the present invention provides a luminous flux control member, a light emitting device, a surface light source device, and a display device capable of suppressing contact between the light diffusing plate and the optical surface of the luminous flux control member even when the light diffusing plate is bent. Can be provided.
  • FIG. 1A is a plan view showing the arrangement of the optical module and the support pin in the lighting device described in Patent Document 1
  • FIG. 1B is a cross section showing the arrangement of the optical module and the support pin in the lighting device described in Patent Document 1.
  • FIG. 2A is a plan view of the surface light source device according to the embodiment of the present invention
  • FIG. 2B is a front view of the surface light source device according to the embodiment of the present invention
  • 3A is a cross-sectional view taken along the line AA shown in FIG. 2B
  • FIG. 3B is a cross-sectional view taken along the line BB shown in FIGS. 2A and 3A.
  • FIG. 4 is a partially enlarged cross-sectional view of a part of FIG. 3B.
  • 5A to 5D are diagrams for explaining the relationship between the distance A and the distance OD.
  • 6A to 6D are views showing the configuration of the luminous flux control member according to the first embodiment.
  • 7A to 7D are views showing a configuration in the light flux control member according to the first embodiment when the support protrusion is located closer to the central axis than the leg portion.
  • 8A to 8D are diagrams showing a configuration when there are two support protrusions in the luminous flux control member according to the first embodiment.
  • 9A to 9D are views showing the configuration of the luminous flux control member according to the second embodiment.
  • 10A to 10D are views showing a configuration in the high-speed control member according to the second embodiment when the support protrusion is located closer to the central axis than the leg portion.
  • 11A to 11D are diagrams showing a configuration when there are two support protrusions in the luminous flux control member according to the second embodiment.
  • FIG. 2A is a plan view of the surface light source device 100
  • FIG. 2B is a front view of the surface light source device 100
  • 3A is a cross-sectional view taken along the line AA shown in FIG. 2B
  • FIG. 3B is a cross-sectional view taken along the line BB shown in FIGS. 2A and 3A
  • FIG. 4 is a partially enlarged cross-sectional view of a part of FIG. 3B.
  • the surface light source device 100 includes a housing 110, a plurality of light emitting devices 200, and a light diffusing plate 120. Further, as shown in FIG. 2B, the surface light source device 100 can be combined with a display member (irradiated member) 102 (shown by a broken line in FIG. 2B) such as a liquid crystal panel to form a display device 100'. Can be used.
  • a display member irradiated member 102
  • the plurality of light emitting devices 200 are arranged in a matrix on the inner surface 114 of the bottom plate 112 of the housing 110.
  • a reflective sheet that functions as a diffuse reflection surface may be arranged on the inner surface 114 of the bottom plate 112.
  • the light diffusing plate 120 is arranged on a plurality of light emitting devices 200 and functions as a light emitting surface.
  • the size of the light emitting surface is not particularly limited, but is, for example, about 809 mm ⁇ about 1439 mm.
  • the light emitting device 200 is fixed to the substrate 115 on the inner surface 114 of the bottom plate 112.
  • the light emitting device 200 includes a light emitting element 210 and a luminous flux control member 300.
  • the position and number of the legs 350 can be freely set in consideration of minimizing the optical influence on the light emitting surface of the surface light source device 100 and stably fixing the legs to the substrate 115. be able to.
  • the light emitting element 210 is a light source of the surface light source device 100.
  • the light emitting element 210 is, for example, a light emitting diode (LED) such as a white light emitting diode.
  • LED light emitting diode
  • the luminous flux control member 300 is arranged on the light emitting element 210 and controls the light distribution of the light emitted from the light emitting element 210.
  • the first optical surface 310 and the second optical surface 320 of the luminous flux control member 300 are rotationally symmetric, and their rotation axes coincide with each other. In the present embodiment, these rotation axes are referred to as "central axis CA of the luminous flux control member".
  • the luminous flux control member 300 is integrally molded.
  • the material of the luminous flux control member 300 is not particularly limited as long as it is a material capable of passing light of a desired wavelength.
  • the material of the luminous flux control member 300 is a light-transmitting resin such as polymethyl methacrylate (PMMA), polycarbonate (PC), or epoxy resin (EP), or glass.
  • the surface light source device 100 is characterized by the configuration of the luminous flux control member 300. Therefore, the luminous flux control member 300 will be described in detail separately.
  • the light diffusing plate 120 is a plate-shaped member having light diffusing properties, and transmits the light emitted from the light emitting device 200 while diffusing it.
  • the size of the light diffusing plate 120 is almost the same as the size of an irradiated member such as a liquid crystal panel.
  • the light diffusing plate 120 is formed of a light transmitting resin such as polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), and styrene / methyl methacrylate copolymer resin (MS).
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • PS polystyrene
  • MS styrene / methyl methacrylate copolymer resin
  • the light diffusing plate 120 has fine irregularities formed on the surface of the light diffusing plate 120 in order to impart light diffusing property, and light diffusing elements such as beads are dispersed inside the light diffusing plate 120. Something is known.
  • 5A to 5D show the relationship between the distance A between the substrate 115 on which the luminous flux control member 300 is arranged and the top of the second optical surface 320 and the distance OD between the substrate 115 and the light diffusing plate 120. ..
  • the distance A and the distance OD are not the distance between the centers but the distance.
  • the support projection 330 which will be described later, gradually becomes longer in the order of FIGS. 5A, B, C, and D, and the distance OD increases.
  • the distance A is the same.
  • OD 2A.
  • the distance A and the distance OD preferably satisfy OD ⁇ 2A as shown in FIGS. 5A to 5C.
  • OD ⁇ 2A As shown in FIGS. 5A to 5C, by setting OD ⁇ 2A, it is possible to reduce the uneven brightness due to the support projection 330 (FIGS. 5A to 5C).
  • FIG. 6A to 6D are views showing the configuration of the luminous flux control member 300 according to the present embodiment.
  • FIG. 6A is a plan view of the luminous flux control member 300.
  • FIG. 6B is a cross-sectional view of the luminous flux control member 300 along the line CC of FIG. 6A.
  • FIG. 6C is a bottom view of the luminous flux control member 300.
  • FIG. 6D is a right side view of the luminous flux control member 300.
  • the luminous flux control member 300 is arranged on the first optical surface 310 arranged on the back side of the luminous flux control member 300 and on the front side of the luminous flux control member 300, and is arranged on the front side of the first optical surface 310. It has a second optical surface 320 for transmitting or reflecting the light incident on the light flux control member 300, and a support protrusion 330 arranged on the front side of the luminous flux control member 300 for supporting the light diffusing plate 120.
  • the "front side” means the light diffusing plate 120 side
  • the "back side” means the bottom plate 112 side (light emitting element 210 side).
  • the luminous flux control member 300 also has a gate mark 340 arranged on a part of the outer peripheral portion of the luminous flux control member 300 and a leg portion 350 arranged on the back side of the luminous flux control member 300.
  • the first optical surface 310 is, for example, the inner surface of a substantially conical concave portion arranged on the back side so as to intersect the central axis CA of the luminous flux control member 300.
  • the first optical surface 310 functions as an incident surface that causes the light emitted from the light emitting element 210 to enter the luminous flux control member 300.
  • the first optical surface 310 is configured such that most of the incident light is directed toward the second optical surface 320.
  • the second optical surface 320 is arranged on the front side so as to intersect the central axis CA, for example.
  • the second optical surface 320 is an exit surface for emitting the light incident on the first optical surface 310 to the outside of the luminous flux control member 300 while controlling the traveling direction.
  • the second optical surface 320 functions in cooperation with the first optical surface 310 to spread the light emitted from the light emitting element 210.
  • the support projection 330 is arranged on the front side of the luminous flux control member 300, and supports the light diffusing plate 120 in the surface light source device 100. That is, the support projection 330 is in contact with the light diffusing plate 120 in the surface light source device 100 (see FIG. 4). As shown in FIG. 6B, the maximum height of the support projection 330 is higher than the maximum height of the second optical surface 320 in the direction (front and back directions) of the central axis CA of the luminous flux control member 300. As a result, even when the light diffusing plate 120 is bent, it is possible to prevent the light diffusing plate 120 from coming into contact with the second optical surface 320 of the luminous flux control member 300.
  • the position of the support projection 330 is not particularly limited as long as the support projection 330 can support the light diffusing plate 120.
  • the support projection 330 may be entirely or partially arranged on the second optical surface 320 or a second. It is arranged on the outer edge of the optical surface 320 or outside the second optical surface 320.
  • the support projection 330 is arranged on the outer edge of the second optical surface 320 or outside the second optical surface 320 from the viewpoint of arranging the support projection 330 at a position that does not impair the optical function of the luminous flux control member 300. It is preferable to be arranged.
  • the support projection 330 is arranged on the second optical surface 320. It is more preferable that the two optical surfaces 320 are arranged closer to the maximum height position, and even more preferably the second optical surface 320 is arranged at the maximum height position.
  • the support projection 330 is arranged outside the second optical surface 320 of the luminous flux control member 300 in the direction orthogonal to the central axis CA.
  • the second optical surface 320 is arranged so as to cover a part of the outer edge of the second optical surface 320.
  • the support projection 330 is arranged on a flange portion arranged on the side of the second optical surface 320. Further, as shown in FIG.
  • the plurality of light emitting devices 200 are arranged so that the positions of the support projections 330 are irregular. As a result, it is possible to suppress the occurrence of uneven brightness caused by the support projection 330.
  • the support protrusion 330 is preferably arranged as follows in relation to the gate mark 340 described later. That is, it is preferable that the support projection 330 is arranged on the opposite side of the gate mark 340 with respect to the virtual plane including the central axis orthogonal to the perpendicular line drawn from the gate mark 340 with respect to the central axis.
  • the support projection 330 and the gate mark 340 which may impair the luminous flux control function, can be arranged apart from each other in the luminous flux control member 300, and it is possible to suppress the occurrence of uneven brightness. ..
  • the support protrusion 330 is preferably arranged as follows from the relationship with the leg portion 350 described later. That is, it is preferable that the support projection 330 is arranged at a position closer to the central axis CA than the leg portion 350 when viewed in a plan view. By arranging in this way, the weight of the light diffusing plate 120 is applied to the support projection 330, and the luminous flux control member 300 is tilted to prevent the leg portion 350 and the substrate 115 from being peeled off. Can be done.
  • 7A to 7D show an example when the support protrusion 330 is arranged closer to the central axis CA than the leg portion 350.
  • 7A to 7D show a plan view, a cross-sectional view, a bottom view, and a right side view of the luminous flux control member, respectively.
  • 7A to 7D show a case where the support projection 330 is on the central axis CA.
  • the shape of the support protrusion 330 is not particularly limited as long as it can support the light diffusing plate 120, but it is preferable that the shape does not impair the optical function of the luminous flux control member 300.
  • the shape of the support protrusion 330 is a truncated cone. The part with the support protrusion tends to be a bright part. Therefore, when the support protrusion portion protrudes from the outer periphery of the light flux control member when viewed in a plan view, it is preferable to design the shape of the protruding support protrusion outer edge so that the light does not concentrate. ..
  • the number of support protrusions 330 is not particularly limited, but is preferably small from the viewpoint of not impairing the function of the luminous flux control member 300. In the present embodiment, the number of support protrusions 330 is one from the above viewpoint.
  • the number of support protrusions 330 suppresses the adhesion between the legs 350 and the substrate 115 from being peeled off due to the weight of the light diffusing plate 120 being applied to one support protrusion 330 and the light flux control member 300 being tilted. From the viewpoint of doing so, it is preferable that there are a plurality of them. In this case, the number of support protrusions 330 is, for example, two, three, four, or five.
  • 8A to 8D show a case where the luminous flux control member 300 according to the first embodiment has two support protrusions 330.
  • 8A to 8D show a plan view, a cross-sectional view, a bottom view, and a right side view of the luminous flux control member, respectively.
  • the support protrusions 330 are evenly arranged on the circumference centered on the central axis CA so that the weight of the light diffusing plate 120 is uniformly applied to the support protrusions 330. It is preferable (see FIG. 8A).
  • the size of the support projection 330 is not particularly limited as long as the light diffusing plate 120 can be supported so that the light diffusing plate 120 does not come into contact with the second optical surface 320, and is appropriately set according to the thickness required for the surface light source device 100 and the like. sell.
  • the length (h) from the maximum height of the second optical surface 320 to the maximum height of the support projection 330 is, for example, about 0.01 mm to 10 mm, and 0.05 mm to 0.05 mm. It is preferably about 2 mm (see FIG. 6B).
  • the height of the support protrusion 330 is preferably set so as to satisfy the above OD ⁇ 2A (see FIGS. 5A to 5D).
  • the gate mark 340 remains on the luminous flux control member 300 because the luminous flux control member 300 is manufactured by injection molding.
  • the gate mark 340 is formed on the outer peripheral portion of the luminous flux control member 300.
  • the gate trace 340 and the support projection 330 are preferably arranged so as to sandwich the central axis CA. By arranging in this way, the gate trace 340 and the support projection 330, which may not be able to orient the light in a desired direction, can be arranged apart from each other in the luminous flux control member 300, and uneven brightness can be suppressed. ..
  • the leg portion 350 is provided on the back side of the luminous flux control member 300 in order to fix the luminous flux control member 300 to the substrate 115 in order to position the luminous flux control member 300 at an appropriate position with respect to the light emitting element 210. From the viewpoint of stably supporting the luminous flux control member 300, it is preferable that the luminous flux control member 300 is provided with a plurality of legs 350. In this embodiment, as shown in FIG. 6C, three legs 350 are provided on the back side of the luminous flux control member 300.
  • At least one of the leg portions 350 is arranged between the support protrusion 330 and the central axis CA. That is, the leg portion 350 closest to the support protrusion 330 when viewed in a plan view is arranged on a line passing through the support protrusion 330 and the central axis CA (see FIG. 6C).
  • the weight of the light diffusing plate 120 is applied to the support projection 330, and the luminous flux control member 300 is tilted to prevent the leg portion 350 and the substrate 115 from being peeled off. Can be done.
  • the luminous flux control member 300 has the support projection 330. Therefore, in the surface light source device 100, the support projection 330 can support the light diffusing plate 120 at a position close to the second optical surface 320, and even if the light diffusing plate 120 bends, the light diffusing plate 120 and the second optical surface It is possible to further prevent contact with the 320. By this.
  • the light diffusing plate 120 and the luminous flux control member 300 (second optical surface 320) can be brought closer to each other, and the surface light source device 100 can be made thinner.
  • Emodiment 2 (Structure of surface light source device and light emitting device)
  • the surface light source device 100 according to the first embodiment only in that the surface light source device according to the second embodiment has the light flux control member 400 according to the second embodiment instead of the light flux control member 300 according to the first embodiment. Different from. Therefore, in the present embodiment, only the luminous flux control member 400 according to the second embodiment will be described.
  • FIG. 9A to 9D are views showing the configuration of the luminous flux control member 400 according to the present embodiment.
  • FIG. 9A is a plan view of the luminous flux control member 400.
  • 9B is a cross-sectional view of the luminous flux control member 400 along the line DD of FIG. 9A.
  • FIG. 9C is a bottom view of the luminous flux control member 400.
  • FIG. 9D is a right side view of the luminous flux control member 400.
  • the luminous flux control member 400 includes a first optical surface 410 arranged on the back side of the luminous flux control member 400 and a second optical surface 420 arranged on the front side of the luminous flux control member 400. It has a third optical surface 460 arranged so as to surround the central axis CA and the second optical surface 420, and a support projection 430.
  • the "front side” means the light diffusing plate 120 side
  • the "back side” means the bottom plate 112 side (light emitting element 210 side).
  • the luminous flux control member 400 also has a gate mark 440 arranged on a part of the outer peripheral portion of the luminous flux control member 400 and a leg portion 450 arranged on the back side of the luminous flux control member 400.
  • the first optical surface 410 is, for example, the inner surface of a substantially conical concave portion arranged on the back side so as to intersect the central axis CA of the luminous flux control member 400.
  • the first optical surface 410 functions as an incident surface that causes the light emitted from the light emitting element 210 to enter the luminous flux control member 400.
  • the first optical surface 410 is configured such that most of the incident light is directed toward the second optical surface 420.
  • the second optical surface 420 is arranged on the front side so as to intersect the central axis CA, for example.
  • the second optical surface 420 is a reflecting surface for reflecting the light incident on the first optical surface 410 toward the side (third optical surface 460 side).
  • the third optical surface 460 is arranged so as to surround the second optical surface 420.
  • the third optical surface 460 is an exit surface that emits the light reflected by the second optical surface 420 to the outside of the luminous flux control member 400.
  • the third optical surface 460 is a side surface connecting the outer edge of the back surface of the luminous flux control member 400 and the outer edge of the front surface.
  • the third optical surface 460 emits the light reflected by the second optical surface 420 laterally (in a direction away from the central axis CA of the luminous flux control member 400).
  • the support projection 430 is arranged on the front side of the luminous flux control member 400, and supports the light diffusing plate 120 in the surface light source device. That is, the support projection 430 is in contact with the light diffusing plate 120 in the surface light source device 100. As shown in FIG. 9B, the maximum height of the support projection 430 is higher than the maximum height of the second optical surface 420 in the direction (front and back directions) of the central axis CA of the luminous flux control member 400. As a result, even when the light diffusing plate 120 is bent, it is possible to prevent the light diffusing plate 120 from coming into contact with the second optical surface 420 of the luminous flux control member 400.
  • the position of the support projection 430 is not particularly limited as long as the support projection 430 can support the light diffusing plate 120.
  • the support projection 430 may be entirely or partially arranged on the second optical surface 420 or may have a second support projection 430. It is arranged on the outer edge of the optical surface 420 or outside the second optical surface.
  • the support projection 430 is preferably arranged outside the second optical surface 420 from the viewpoint of arranging the support projection 430 at a position that does not impair the optical function of the luminous flux control member 400.
  • the support projection 430 is arranged outside the second optical surface 420 of the luminous flux control member 400 in the direction orthogonal to the central axis CA. As a result, it is possible to prevent the support projection 430 from impairing the luminous flux control function of the second optical surface 420.
  • the support projection 430 is arranged outside the second optical surface 420, it is preferable that the support projection 430 is arranged on a flange portion arranged on the side of the second optical surface 420.
  • the plurality of light emitting devices 200 are arranged so that the positions of the support protrusions 430 are irregular (see FIG. 3A). As a result, it is possible to suppress the occurrence of uneven brightness caused by the support projection 430.
  • the support protrusion 430 is preferably arranged as follows in relation to the gate mark 440 described later. That is, it is preferable that the support protrusion 430 is arranged on the opposite side of the gate mark 440 with respect to the virtual plane including the central axis orthogonal to the perpendicular line drawn from the gate mark 440 with respect to the central axis.
  • the support projection 430 and the gate mark 440 which may impair the luminous flux control function, can be arranged apart from each other in the luminous flux control member 400, and it is possible to suppress the occurrence of uneven brightness. ..
  • the support protrusion 430 is preferably arranged as follows from the relationship with the leg portion 450 described later. That is, it is preferable that the support protrusion 430 is arranged at a position closer to the central axis CA than the leg portion 450 when viewed in a plan view. By arranging in this way, it is possible to prevent the light flux control member 400 from being peeled off due to the weight of the light diffusing plate 120 being applied to the support projection 430 and the light flux control member 400 being tilted. Can be done.
  • FIGS. 10A to 10D show an example when the support protrusion 430 is arranged at a position closer to the central axis CA than the leg portion 450.
  • 10A to 10D show a plan view, a cross-sectional view, a bottom view, and a right side view of the luminous flux control member, respectively.
  • 10A to 10D show a case where the support projection 430 is on the central axis CA.
  • the shape of the support protrusion 430 is not particularly limited as long as it can support the light diffusing plate 120, but it is preferable that the shape does not impair the optical function of the luminous flux control member 400.
  • the shape of the support protrusion 430 is a truncated cone.
  • the number of support protrusions 430 is not particularly limited, but is preferably small from the viewpoint of not impairing the function of the luminous flux control member 400. In the present embodiment, the number of support protrusions 430 is one from the above viewpoint.
  • the number of support protrusions 430 suppresses the adhesion between the leg portion 450 and the substrate 115 from being peeled off due to the weight of the light diffusing plate 120 being applied to one support protrusion 430 and the light flux control member 400 being tilted. From the viewpoint of doing so, it is preferable that there are a plurality of them. In this case, the number of support protrusions 430 is, for example, two, three, four, or five.
  • 11A to 11D show a case where the luminous flux control member 400 according to the second embodiment has two support protrusions 430.
  • 11A to 11D show a plan view, a cross-sectional view, a bottom view, and a right side view of the luminous flux control member, respectively.
  • the support protrusions 430 are evenly arranged on the circumference centered on the central axis CA so that the weight of the light diffusing plate 120 is uniformly applied to the support protrusions 430. It is preferable (see FIG. 11A).
  • the size of the support projection 430 is not particularly limited as long as the light diffusing plate 120 can be supported so that the light diffusing plate 120 does not come into contact with the second optical surface 420, and is appropriately set according to the thickness required for the surface light source device 100 and the like. sell.
  • the length (h) from the maximum height of the second optical surface 420 to the maximum height of the support projection 430 is, for example, about 0.01 mm to 10 mm, and 0.05 mm to 0.05 mm. It is preferably about 2 mm (see FIG. 9B).
  • the distance between the substrate 115 on which the luminous flux control member 400 is arranged and the top of the second optical surface 420 is defined as the distance A
  • the distance between the substrate 115 and the light diffusing plate 120 is defined as the distance OD.
  • the height of the support protrusion 430 is preferably set so as to satisfy the above OD ⁇ 2A (see FIGS. 5A to 5D).
  • the gate mark 440 remains in the luminous flux control member 400 because the luminous flux control member 400 is manufactured by injection molding.
  • the gate mark 440 is formed on the outer peripheral portion of the luminous flux control member 400.
  • the gate trace 440 and the support protrusion 430 are preferably arranged so as to sandwich the central axis CA. By arranging in this way, the gate trace 440 and the support projection 430, which may not be able to orient the light in a desired direction, can be arranged apart from each other in the luminous flux control member 400, and uneven brightness can be suppressed. ..
  • the leg portion 450 is provided on the back side of the luminous flux control member 400 in order to position the luminous flux control member 400 at an appropriate position with respect to the light emitting element 210.
  • three legs 450 are provided on the back side of the luminous flux control member 400.
  • At least one of the legs 450 is arranged between the support protrusion 430 and the central axis CA. That is, the leg portion 450 closest to the support protrusion 430 when viewed in a plan view is arranged on a line passing through the support protrusion 430 and the central axis CA (see FIG. 9C).
  • the surface light source device according to the present embodiment has the same effect as the surface light source device 100 according to the first embodiment.
  • the luminous flux control member, light emitting device, surface light source device, and display device according to the present invention can be applied to, for example, a backlight of a liquid crystal display device, general lighting, and the like.
  • Lighting device 20
  • Optical module 21 LED 22
  • Diffusing lens 30
  • Support pin 100
  • Surface light source device 100'Display device
  • Display member (irradiated member) 110 Housing 112
  • Bottom plate 114
  • Inner surface 115
  • Substrate 120
  • Light diffusing plate (light emitting surface) 200
  • Light emitting device 210
  • Light emitting element 300 400
  • Luminous flux control member 310
  • Support protrusion 340, 440 Gate mark 350 450 Leg 460
  • Third optical surface CA CA Central axis

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention aborde le problème de la fourniture d'un élément de commande de flux lumineux en mesure d'empêcher une plaque de diffusion de lumière et une surface optique de l'élément de commande de flux lumineux d'entrer en contact l'une avec l'autre même lorsque la plaque de diffusion de lumière a gauchi. Cet élément de commande de flux lumineux comprend : une première surface optique qui est disposée sur le côté arrière de l'élément de commande de flux lumineux afin de rendre la lumière émise en provenance de l'élément électroluminescent incidente sur l'intérieur de l'élément de commande de flux lumineux ; une deuxième surface optique qui est disposée sur le côté avant de l'élément de commande de flux lumineux afin de transmettre ou de réfléchir la lumière incidente en provenance de la première surface optique ; une partie saillante de support qui est disposée sur le côté avant de l'élément de commande de flux lumineux afin de supporter la plaque de diffusion de lumière ; et une pluralité de parties formant patte qui sont disposées sur le côté arrière de l'élément de commande de flux lumineux. Dans la direction de l'axe central de l'élément de commande de flux lumineux, la hauteur maximale de la partie saillante de support est supérieure à la hauteur maximale de la deuxième surface optique, et, vue en plan, la partie formant patte la plus proche de la partie saillante de support parmi la pluralité de parties formant patte est disposée sur une ligne passant par la partie saillante de support et l'axe central.
PCT/JP2020/035147 2019-09-20 2020-09-16 Élément de commande de flux lumineux, dispositif électroluminescent, appareil de source de lumière de surface et appareil d'affichage WO2021054377A1 (fr)

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JP2019171574 2019-09-20
JP2019-171574 2019-09-20

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011010488A1 (fr) * 2009-07-21 2011-01-27 シャープ株式会社 Unité de lentille, module électroluminescent, dispositif d’éclairage, dispositif d’affichage, et dispositif de réception de télévision
JP2015176862A (ja) * 2014-03-18 2015-10-05 株式会社エンプラス 発光装置、面光源装置および表示装置
US20150300594A1 (en) * 2011-10-11 2015-10-22 Lg Electronics Inc. Optical assembly, backlight unit having the same, and display apparatus thereof
JP2017183077A (ja) * 2016-03-30 2017-10-05 株式会社エンプラス 面光源装置、表示装置および光束制御部材

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011010488A1 (fr) * 2009-07-21 2011-01-27 シャープ株式会社 Unité de lentille, module électroluminescent, dispositif d’éclairage, dispositif d’affichage, et dispositif de réception de télévision
US20150300594A1 (en) * 2011-10-11 2015-10-22 Lg Electronics Inc. Optical assembly, backlight unit having the same, and display apparatus thereof
JP2015176862A (ja) * 2014-03-18 2015-10-05 株式会社エンプラス 発光装置、面光源装置および表示装置
JP2017183077A (ja) * 2016-03-30 2017-10-05 株式会社エンプラス 面光源装置、表示装置および光束制御部材

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