WO2014050602A1 - Lentille et matrice de moulage - Google Patents

Lentille et matrice de moulage Download PDF

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Publication number
WO2014050602A1
WO2014050602A1 PCT/JP2013/074742 JP2013074742W WO2014050602A1 WO 2014050602 A1 WO2014050602 A1 WO 2014050602A1 JP 2013074742 W JP2013074742 W JP 2013074742W WO 2014050602 A1 WO2014050602 A1 WO 2014050602A1
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WO
WIPO (PCT)
Prior art keywords
lens
optical
diameter
optical axis
optical surface
Prior art date
Application number
PCT/JP2013/074742
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English (en)
Japanese (ja)
Inventor
下間剛
Original Assignee
コニカミノルタ株式会社
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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
Publication of WO2014050602A1 publication Critical patent/WO2014050602A1/fr

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    • 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
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • 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
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses
    • 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 lens for controlling a luminous flux from an LED or the like and a molding die for manufacturing the lens.
  • the lens used for controlling the illumination light beam is also called a light beam control member, and has a special optical surface and is disposed so as to cover the light source.
  • a lens includes a first optical surface having a deep concave shape and a small diameter, and a second optical surface having a convex shape as a whole and having a relatively small curvature, and is a flat surface provided around the first optical surface.
  • Three leg portions are formed so as to protrude from the bottom portion in an even arrangement (see Patent Document 1).
  • the three legs Since the bottom surface provided on the lens also serves as a reflecting surface for effective use of light, the three legs have a peak light amount when the reflected light from the second optical surface is incident on the flat surface. It is arranged inside the circumferential region. By arranging the legs in this way, the influence on the optical characteristics can be suppressed to a small extent, and not only the lens mounting area on the support substrate can be reduced, but also cracks in the legs due to the difference in thermal expansion. It can also be prevented.
  • the lens leg is placed in the vicinity of the LED, the light beam from the LED is directly incident on the leg, and then the optical characteristics of the entire lens are unexpected due to reflection and transmission. End up. This is a serious problem particularly in lenses for backlight illumination that are desired to have a uniform light distribution.
  • the LED is arranged further inside the leg portion arranged on the inner side, which restricts the size of the LED.
  • the LED may be high-powered, and if the leg portion is disposed in the vicinity of the LED, the light is incident from the LED. Not only changes in optical characteristics, but also distortion and cracks of the leg due to heat from the LED occur.
  • the present invention has been made in view of the above-described background art, and the light distribution is not uniform due to light directly incident on the leg portion from the light source, and is arranged while suppressing distortion or cracking of the leg portion.
  • An object of the present invention is to provide a lens having a high degree of freedom in the size of the light source and a molding die for manufacturing the lens.
  • a lens according to the present invention is a lens that controls the traveling direction of a light beam emitted from a light emitting element, and includes a first optical surface and a second diameter that is larger than the first optical surface.
  • the lens diameter is D
  • the lens is arranged outside a circle having a diameter of 0.37D with respect to the optical axis.
  • that the leg is outside the circle having a diameter of 0.37D means that the portion of the leg that is closest to the optical axis is outside the circle having a diameter of 0.37D.
  • the legs can be arranged sufficiently away from the optical axis. Thereby, it can suppress that the light ray radiate
  • the degree of freedom of the size of the light emitting element disposed between the plurality of leg portions facing the first optical surface can be increased.
  • the plurality of legs can be separated from the light emitting element to some extent, local heating inside the legs can be suppressed, and formation of cracks or distortion around the legs can be suppressed. Furthermore, since the position of the leg portion is not too much inside the lens, it is easy to attach the lens to the substrate with the leg portion as a contact point.
  • the plurality of leg portions are arranged inside a circle having a diameter of 0.8D with respect to the optical axis.
  • the leg portion exists in the inner region from the diameter 0.8D where the light reflected by the second optical surface is relatively small, and the influence of the light reflected by the leg portion on the light distribution characteristics is extremely small. Can be kept to a small amount. Further, the leg portion does not approach the lens periphery too much, the substrate to which the lens is attached can be made small, and cracks due to the difference in thermal expansion coefficient are less likely to occur.
  • the plurality of leg portions are arranged in a range from 0.5D to 0.7D in diameter with respect to the optical axis.
  • the diameter is set to 0.5D or more, the influence on the optical characteristics due to the presence of the leg portion can be further reduced, and the degree of freedom of the size of the light emitting element can be further increased.
  • the diameter is set to 0.7D or less, it is possible to further reduce the influence on the light distribution characteristics while ensuring a sufficient space for arranging the legs.
  • the peripheral portion of the flat surface also has a function as a reflecting surface, and it is desirable that the leg portion be separated to some extent from the outer edge of the flat surface.
  • the plurality of legs have traces of protruding pins for release on the bottom surface.
  • a pin mark from remaining on the flat surface of the lens. Since there are no traces of pins protruding on a flat surface or the like, it is possible to prevent light reflected by the second optical surface from protruding and becoming unexpected stray light on the pin traces, and to prevent deterioration of the optical performance of the lens. it can.
  • the leg portion is 0.37D or more and 0.8D or less because distortion of the lens due to protrusion is small.
  • the plurality of leg portions are arranged at equal intervals on a circumference centered on the optical axis.
  • the lens can be supported on the support substrate with a good balance.
  • the plurality of leg portions have a circular shape or an elliptical outline having a long axis in the radial direction centered on the optical axis when projected onto a plane perpendicular to the optical axis.
  • the support range can be expanded compared to the area thereof, so that the stability of the support can be ensured while preventing the deterioration of the optical characteristics of the lens.
  • the area is smaller than a circle whose diameter is the major axis of the ellipse, so that the influence on the optical characteristics is small, and it is possible to stably adhere to a wide substrate or a narrow substrate. it can.
  • the plurality of legs have a roughened surface. In this case, since light diffuses on the surface of the leg portion, stray light generated by light that is directly or indirectly incident on the leg portion can be suppressed.
  • the first optical surface has a concave shape having a relatively large curvature compared to the second optical surface
  • the second optical surface has a convex shape as a whole and is locally located in the center. It has a typical concave area.
  • the lens is for LED backlight illumination.
  • the LEDs enable uniform and efficient illumination on the liquid crystal panel and other display elements.
  • a molding die is a molding die having a transfer surface for injection molding a lens for controlling the traveling direction of a light beam emitted from a light emitting element.
  • the plurality of legs are arranged outside the circle having a diameter of 0.37D with respect to the optical axis, where D is the lens diameter.
  • the molding die forms a transfer surface for forming the first optical surface, a transfer surface for forming the second optical surface, a transfer surface for forming a flat surface, and a plurality of legs. And a plurality of leg portions provided on the lens by the leg transfer surface are arranged as described above.
  • the first optical surface, the second optical surface, the flat surface, and the transfer surfaces for the plurality of legs are arranged outside the circle having a diameter of 0.37D with respect to the optical axis.
  • the light beam from the light emitting element can be prevented from being obstructed by the leg portion, and the light utilization efficiency can be increased.
  • the degree of freedom of the size of the light emitting element disposed between the plurality of leg portions facing the first optical surface can be increased.
  • the plurality of legs can be separated from the light emitting element to some extent, local heating inside the legs can be suppressed, and cracks can be prevented from being formed around the legs.
  • the plurality of leg portions are arranged inside a circle having a diameter of 0.8D with respect to the optical axis.
  • the plurality of leg portions are arranged in a range from 0.5D to 0.7D in diameter with respect to the optical axis.
  • a release pin for release is provided at a portion where the bottom surface of the plurality of leg portions is transferred.
  • the first mold includes a first mold that molds the first optical surface side of the lens and a second mold that molds the second optical surface side of the lens.
  • the portion that transfers from the portion corresponding to the leg portion to the portion adjacent to the core portion does not become too thin, so that the mold processing becomes easy.
  • FIG. 1A is a rear view of the lens of the first embodiment
  • FIG. 1B is a cross-sectional view taken along arrow AA in FIG. 1A
  • FIG. 1C is a front view of the lens in FIG. 1A
  • 2A and 2B are diagrams illustrating the lens shape and functions shown in FIG. 1A and the like.
  • 3A is an enlarged cross-sectional view of a molding die for molding the lens of FIG. 1
  • FIG. 3B is an end view of a movable die in the die of FIG. 3A. It is a reverse view of the lens of 2nd Embodiment.
  • a lens 10 shown in FIGS. 1A to 1C is a lens (light flux controlling member) that controls a light beam for illumination from an LED (Light Emitting Diode) or the like, that is, a traveling direction of a light flux emitted from a light emitting element. That is, the lens 10 is an illumination optical system for LED backlight illumination, for example, and constitutes a part of the backlight light source. As shown in FIGS. 1A to 1C, the lens 10 includes an optical part 10a, an outer peripheral part 10b, a protruding part 10c, and a leg part 10d.
  • the lens 10 includes an optical part 10a, an outer peripheral part 10b, a protruding part 10c, and a leg part 10d.
  • the optical part 10a is a part having an optical function, and has a pair of opposed first and second optical surfaces S1 and S2 and a flat surface S6 extending from the periphery of the first optical surface S1.
  • the first optical surface S1 has a concave shape
  • the second optical surface S2 has an overall convex shape.
  • the first optical surface S1 has a concave shape having a relatively larger curvature than the second optical surface S2, and is deeply recessed toward the center of the second optical surface S2.
  • the second optical surface S2 has a shallow concave region at the center, and has a larger diameter than the first optical surface S1.
  • the center of the optical unit 10a is thin, and the periphery of the center is thick.
  • the lens 10 is a lens having a high thickness deviation ratio.
  • the flat surface S6 extends substantially perpendicular to the optical axis OA and is on the same plane as the first outer peripheral surface S3 of the outer peripheral portion 10b.
  • a light-emitting element such as an LED, which will be described later, is disposed so as to face the first optical surface S1 side.
  • the outer peripheral part 10b extends around the optical part 10a.
  • the outer peripheral part 10b has a pair of opposing first and second outer peripheral surfaces S3 and S4, and an outer peripheral side surface S5 connecting the first and second outer peripheral surfaces S3 and S4.
  • the first and second outer peripheral surfaces S3 and S4 extend perpendicular to the optical axis OA of the lens 10.
  • the protrusion 10c protrudes from the outer peripheral side surface S5 of the outer peripheral portion 10b in the outer peripheral direction.
  • the protruding portion 10c is provided so as to extend to the outside of the outer peripheral portion 10b.
  • the protrusion 10c is a flat portion, and specifically, has a rectangular plate shape or block shape.
  • the protrusion 10c has a pair of first and second protrusion surfaces S7 and S8 perpendicular to the optical axis OA, and a protrusion side surface S10 sandwiched between the first and second protrusion surfaces S7 and S8. .
  • a gate cut trace GS is formed on the second projection surface S8 on the second optical surface S2 side of the first and second projection surfaces S7 and S8.
  • the gate cut trace GS is formed in the depression 10g and is not protruding from the second protrusion surface S8.
  • the protruding side surface S10 of the protruding portion 10c is connected to the outer peripheral side surface S5 of the outer peripheral portion 10b at both ends.
  • the leg part 10d is a part attached to the support substrate 60 (refer FIG. 2B) of a light emitting element.
  • the leg portion 10d is a thin cylindrical or low trapezoidal portion, and protrudes in a direction parallel to the optical axis OA from the flat surface S6 of the optical portion 10a.
  • the leg portions 10d are provided at three locations at equal intervals on the same circumference around the optical axis OA of the flat surface S6.
  • Each leg 10d has a side wall S21 and a top surface S22.
  • the top surface S22 is parallel to the surrounding flat surface S6.
  • the trace 71 of the protrusion pin 31 mentioned later is formed in the top
  • the side wall S21 and the top surface S22 of the leg 10d can be roughened. In this case, stray light can be prevented from being generated by the light LB3 (see FIG. 2B) that is directly or indirectly incident on the leg 10d.
  • the roughening of the leg 10d can be achieved by roughening the transfer surface of the mold, which will be described later, but it can also be roughened in a later step.
  • the three leg portions 10d are disposed outside an inner non-arrangement region AC that is a circular region centered on the optical axis OA.
  • the diameter AR of the inner non-arrangement region AC is 0.37 D, where D is the diameter of the lens 10. That is, the three leg portions 10d are arranged outside including the circumference of a circle having a diameter of 0.37D with respect to the optical axis OA.
  • the leg portion 10d may be formed outside the inner non-arrangement area AC, but is preferably formed inside the outer non-arrangement area AC2 (on the optical axis OA side).
  • the diameter AR2 of the outer non-arrangement region AC2 (the inner diameter of the non-arrangement region AC2) is 0.8D, where D is the diameter of the lens 10. That is, the leg portion 10d is in a region having a diameter of 0.37D to 0.8D centered on the optical axis OA, and more preferably in a region having a diameter of 0.5D to 0.7D. More preferably, the leg 10d is in the region of 0.55D to 0.65D.
  • the leg 10d is in the region having a diameter of 0.37D to 0.8D means that the point closest to the optical axis OA of the leg 10d is outside the circle having a diameter of 0.37D and the leg 10d It means that the point farthest from the optical axis OA is inside the circle having a diameter of 0.8D.
  • the non-arrangement regions AC and AC2 do not include the circumferences of 0.37D and 0.8D, that is, on the boundary line, and the leg portions 10d can be disposed on the boundary line.
  • the light beam LB2 emitted from the light emitting element 50 enters the lens 10 from the first optical surface S1 side, passes through the second optical surface S2 as it is, and becomes illumination light. Further, the light beam LB2 partially reflected by the second optical surface S2 is partially reflected again by the flat surface S6, and then passes through the second optical surface S2, thereby contributing as illumination light. Note that the illumination light such as the light beam LB2 emitted from the light emitting element 50 and whose luminous flux is controlled by the lens 10 is used as a backlight for illuminating a liquid crystal panel and other display elements.
  • these leg portions 10d can be sufficiently separated from the optical axis OA and the light emitting element 50. Thereby, it can suppress that the light ray LB1 inject
  • the size of the light emitting element 50 can be increased, and the degree of freedom of the size of the light emitting element 50 can be increased.
  • the three leg portions 10d are sufficiently separated from the light emitting element 50, and local heating inside the leg portion 10d is performed. It is possible to suppress the formation of cracks in the base portion 10j of the leg portion 10d and the like, and the occurrence of changes in optical performance due to distortion caused by local heating. As described above, by arranging the leg portion 10d outside the non-arrangement area AC, it is possible to obtain a highly reliable lens while making the light distribution characteristics of the lens uniform.
  • leg portions 10d By arranging the three leg portions 10d inside the non-arrangement region AC2 as described above (on the optical axis OA side), these leg portions 10d pass the light beam LB2 reflected by the second optical surface S2. Is present in a relatively small inner region, and the influence on the light distribution characteristics by the light reflected by the leg 10d can be suppressed to a very small amount. Further, the leg portion 10d does not come too close to the peripheral portion of the lens 10, the support substrate 60 to which the lens 10 is attached can be made small, and cracks due to the difference in thermal expansion coefficient are less likely to occur.
  • the light emitting element 50 and the lens 10 are aligned with each other and fixed on the support substrate 60. At this time, the end surface (top surface S22) of the leg 10d is bonded to the support substrate 60, and the arrangement of the lens 10 with respect to the support substrate 60 is adjusted.
  • a molding die 100 for manufacturing the lens 10 shown in FIG. 1A and the like includes a fixed die 11, a movable die 12, a pinpoint gate mechanism 40, and an ejecting mechanism 30. .
  • the movable mold 12 is supported by a movable plate (not shown) as a first mold and can move forward and backward with respect to the fixed mold 11.
  • the movable mold 12 includes a core portion 12i disposed around the axis AX, and a peripheral portion 12j disposed around or outside the core portion 12i.
  • the movable mold 12 has a first optical surface transfer surface T1, a first outer peripheral surface transfer surface T3, an outer peripheral side surface transfer surface T5, and a flat surface transfer surface T6 on the mold matching surface PP side facing the fixed mold 11.
  • the first protrusion transfer surface T7, the protrusion side transfer surface T10, and the leg transfer surfaces T21 and T22 are examples of the first protrusion transfer surface T7, the protrusion side transfer surface T10, and the leg transfer surfaces T21 and T22.
  • the first optical surface transfer surface T1 is provided on the surface of the core portion 12i.
  • the other transfer surfaces T3, T5, T6, T7, T10, T21, and T22 are provided on the surface of the peripheral portion 12j.
  • the first optical surface transfer surface T1 corresponds to the shape of the first optical surface S1 of the lens 10 and has a shape obtained by inverting this. That is, the first optical surface transfer surface T1 has a convex shape.
  • the first outer peripheral surface transfer surface T3 corresponds to the shape of the first outer peripheral surface S3 of the lens 10.
  • the outer peripheral side transfer surface T5 corresponds to the shape of the outer peripheral side surface S5 of the lens 10.
  • the flat surface transfer surface T6 corresponds to the shape of the flat surface S6 of the lens 10.
  • the first protrusion transfer surface T7 corresponds to the shape of the first protrusion surface S7 of the lens 10.
  • the protrusion side transfer surface T10 corresponds to the shape of the protrusion side surface S10 of the lens 10.
  • the leg transfer surfaces T21 and T22 correspond to the shape of the leg 10d of the lens 10.
  • the leg transfer surface T21 corresponds to the side wall S21 of the leg 10d and has a shape obtained by inverting it.
  • the leg transfer surface T22 corresponds to the top surface S22 of the leg 10d and has a shape obtained by inverting it.
  • a central portion of the leg transfer surface T22 is a tip surface 31a of a protrusion pin 31 described later.
  • the movable mold 12 is provided with a cooling path (not shown). This cooling path is for flowing cooling water or the like, and is provided for preventing overheating of the movable mold (first mold) 12 and cooling the molten resin.
  • the movable mold 12 includes the core portion 12i for forming the first optical surface S1 by transfer, and the peripheral portion 12j disposed around the core portion 12i to form the flat surface S6 and the plurality of leg portions 10d. And have.
  • the peripheral portion 12j the portion that transfers from the protruding pin 31 or the like corresponding to the leg portion 10d to the portion adjacent to the core portion 12i does not become too thin, so that the mold processing becomes easy.
  • the fixed mold 11 is supported and fixed by a fixed plate (not shown) as a second mold.
  • the fixed mold 11 has a second optical surface transfer surface T2, a second outer peripheral surface transfer surface T4, and a second protrusion transfer surface T8 on the mold matching surface PP side facing the movable mold 12.
  • These transfer surfaces T2, T4, and T8 serve as a second transfer surface 11a that forms the second optical surface S2 side of the lens 10.
  • the second optical surface transfer surface T2 corresponds to the shape of the second optical surface S2 of the lens 10 and has a shape obtained by inverting this. That is, the second optical surface transfer surface T2 has a concave shape as a whole.
  • the second outer peripheral surface transfer surface T4 corresponds to the shape of the second outer peripheral surface S4 of the lens 10.
  • the second protrusion transfer surface T8 corresponds to the shape of the second protrusion surface S8 of the lens 10.
  • a mold space (cavity) CV is formed between the fixed mold 11 and the movable mold 12 by clamping.
  • a gate 41 of a pinpoint gate mechanism 40 which will be described later, communicates with the cavity CV via the second protrusion transfer surface T8.
  • the cavity CV corresponds to the outer shape of the lens 10 shown in FIGS. 1A to 1C and the like.
  • the cavity CV is a space with a high thickness deviation ratio that is thin at the center and has a large thickness difference between the center and the periphery thereof.
  • the fixed mold 11 is provided with a cooling path (not shown). This cooling path is for flowing cooling water or the like, and is provided to prevent overheating of the fixed mold (second mold) 11 and to cool the molten resin.
  • the movable mold 12 has a plurality of first transfer surfaces 12a.
  • the fixed mold 11 also has a plurality of second transfer surfaces 11a facing the plurality of second transfer surfaces 12a.
  • the shape characteristic of the molding die 100 shown to FIG. 3A is demonstrated.
  • the three leg transfer surfaces T22 correspond to the leg 10d shown in FIG. 1A and the like.
  • the leg transfer surface T22 is disposed outside the inner non-arrangement region AC that is a circular region centered on the axis AX.
  • the diameter AR of the inner non-arrangement region AC is 0.37D, where D is the diameter of the cavity CV corresponding to the diameter of the lens 10.
  • the leg transfer surface T22 is formed on the inner side (axis AX side) of the outer non-arrangement region AC2 larger than the diameter 0.8D.
  • the leg transfer surface T22 is in a region having a diameter of 0.37D to 0.8D centered on the axis AX, and more preferably in a region having a diameter of 0.5D to 0.7D. It is in. More preferably, the leg transfer surface T22 is in the region of 0.55D to 0.65D.
  • the pinpoint gate mechanism 40 shown in FIG. 3A has a structure that automatically performs gate cutting by mold opening.
  • the molding mold 100 is provided with a runner removal mold (not shown) on the fixed mold 11 side.
  • the runner removal mold is closed to the fixed mold 11 side during molding and separated from the fixed mold 11 during mold release.
  • the pinpoint gate mechanism 40 has a gate 41 that tapers toward the cavity CV on the die matching surface PP side.
  • the tip 41a of the gate 41 is arranged in a state of protruding from the mold matching surface PP toward the movable mold 12 side.
  • the ejecting mechanism 30 is urged by a drive device (not shown) and can be advanced and retracted at a desired timing along the AB direction along the axis AX of the molding die 100.
  • the protrusion mechanism 30 includes a plurality of protrusion pins 31. Each protruding pin 31 is inserted into a pin hole 12 d (see FIG. 3A) provided in the movable mold 12. Three pin holes 12d are provided in correspondence with the leg transfer surface T22. As already described, the tip of the protrusion pin 31 is the central portion of the leg transfer surface T22 that faces the cavity CV in the illustrated state where the fixed mold 11 and the movable mold 12 are clamped.
  • the fixed mold 11 and the movable mold 12 which are separated from each other are adjusted to a predetermined temperature in the standby state.
  • the movable mold 12 is operated to close the fixed mold 11 and the movable mold 12, and the molds 11 and 12 are clamped with a predetermined pressure.
  • a cavity CV is formed between the molds 11 and 12.
  • the molten resin guided to the gate 41 of the pinpoint gate mechanism 40 in a state where the molds 11 and 12 are clamped is injected into the cavity CV from the opening of the tip 41a.
  • the molten resin in the cavity CV is cooled by both molds 11 and 12, and the lens 10 as a molded product is obtained.
  • the runner removal mold (not shown) of the pinpoint gate mechanism 40 is separated from the fixed mold 11. Thereby, unnecessary parts (not shown) such as a gate part and a runner part other than the lens 10 are pulled out from the fixed mold 11. That is, the lens 10 is released by opening the fixed mold 11 and the movable mold 12, and the gate is automatically cut.
  • the plurality of leg portions 10d are arranged outside the circle having a diameter of 0.37D (D is the diameter of the lens 10) with respect to the optical axis OA, It can arrange
  • the plurality of leg portions 10d in the range outside the circle of 0.37D, the size of the light emitting element 50 arranged between the plurality of leg portions 10d facing the first optical surface S1. The degree of freedom can be increased.
  • the plurality of legs 10d can be separated from the light emitting element 50 to some extent, local heating inside the legs 10d can be suppressed, and cracks and the like can be prevented from being formed around the legs 10d. .
  • the pinpoint gate mechanism 40 can be replaced with a hot runner mechanism or the like.
  • the lens and the mold according to the second embodiment will be described.
  • the lens and the molding die of the second embodiment are partially modified from the lens and the molding die of the first embodiment, and items not specifically described are the same as those of the lens and the molding die of the first embodiment. It is.
  • the contours transferred to the surfaces perpendicular to the optical axis OA of each leg 2010d provided on the lens 10 are elliptical, and the major axis extends in the radial direction.
  • the lens 10 can be securely fixed in correspondence with both the support substrate 60A having a narrow width and the support substrate 60B having a wide width indicated by the imaginary line.
  • the legs 2010d are not elliptical but circular, but if the legs are simply circular, the area of the legs increases and the area of the flat surface S6 decreases, and the use of light rays. As the efficiency decreases, the optical characteristics deteriorate.
  • an elliptical shape extending in the radial direction like the leg portion 2010d provided on the lens 10 of the present embodiment it is possible to prevent deterioration of optical characteristics while supporting various support substrates 60A and 60B.
  • the optical part 10a and the outer peripheral part 10b of the lens 10 have a circular outline, but the optical part 10a and the outer peripheral part 10b may have a rectangular or oval (including elliptical) outline. .
  • the circular leg portion 10d and the elliptical leg portion 2010d have been described.
  • the contour shape of the leg portion can be changed as appropriate according to the application, and the like, such as a triangle, a rectangle, an ellipse (including an ellipse) It can be set as various shapes.
  • the light emitting element 50 is not limited to an LED, and may be an LD (LaserLaDiode), a VCSEL (Vertical Cavity Surface Emitting Laser), or the like.
  • the molding die 100 is used as a horizontal die or a saddle die.
  • the fixed mold 11 and the movable mold 12 are arranged to face each other in the horizontal direction.
  • the fixed mold 11 and the movable mold 12 are arranged to face each other in the vertical direction.
  • the fixed mold 11 and the movable mold 12 can be replaced. That is, the first optical surface S1 and the like can be formed on the fixed mold 11 side, and the second optical surface S2 and the like can be formed on the movable mold 12 side.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

La présente invention porte sur une lentille apte à améliorer le rendement de prise de lumière provenant d'une source lumineuse et à accroître le degré de liberté dans la dimension de la source lumineuse fournie. Une pluralité de parties (10d) de jambe sont agencées à l'extérieur d'un cercle ayant un diamètre de 0,37 D (D est le diamètre d'une lentille (10)) ayant l'axe optique (OA) en tant que centre, empêchant ainsi l'obstruction d'un faisceau lumineux (LB1) provenant d'un élément (50) d'émission de lumière par les parties (10d) de jambe. Par suite, le rendement d'utilisation de lumière peut être amélioré. En outre, par agencement de la pluralité de parties (10d) de jambe dans la zone à l'extérieur du cercle de 0,37 D, il est possible d'accroître le degré de liberté en dimension de l'élément (50) d'émission de lumière agencé entre la pluralité de parties (10d) de jambe opposé à une première surface (S1) optique. En outre, il est possible d'éloigner la pluralité de parties (10d) de jambe de l'élément (50) d'émission de lumière à une certaine portée, pour empêcher un chauffage localisé vers l'intérieur des parties (10d) de jambe, et pour rendre minimale la formation de fissures dans la périphérie des parties (10d) de jambe.
PCT/JP2013/074742 2012-09-29 2013-09-12 Lentille et matrice de moulage WO2014050602A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012218918 2012-09-29
JP2012-218918 2012-09-29

Publications (1)

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WO2014050602A1 true WO2014050602A1 (fr) 2014-04-03

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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016005872A (ja) * 2014-06-20 2016-01-14 コニカミノルタ株式会社 型装置及び光学素子
WO2018181387A1 (fr) * 2017-03-28 2018-10-04 株式会社エンプラス Élément de commande de flux lumineux, dispositif électroluminescent et procédé de fabrication de dispositif électroluminescent
WO2019003879A1 (fr) * 2017-06-29 2019-01-03 日本電産サンキョー株式会社 Procédé de production de lentille organique

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Publication number Priority date Publication date Assignee Title
JPS6111212A (ja) * 1984-06-28 1986-01-18 Toshiba Corp 光学部品の製造方法
JP2008094658A (ja) * 2006-10-12 2008-04-24 Canon Inc 光学素子の製造方法および光学素子
WO2011062089A1 (fr) * 2009-11-17 2011-05-26 シャープ株式会社 Unité d'émission de lumière de surface et dispositif d'affichage équipé d'une telle unité
JP2012004078A (ja) * 2010-06-21 2012-01-05 Enplas Corp 発光装置、面光源装置、表示装置及び光束制御部材

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6111212A (ja) * 1984-06-28 1986-01-18 Toshiba Corp 光学部品の製造方法
JP2008094658A (ja) * 2006-10-12 2008-04-24 Canon Inc 光学素子の製造方法および光学素子
WO2011062089A1 (fr) * 2009-11-17 2011-05-26 シャープ株式会社 Unité d'émission de lumière de surface et dispositif d'affichage équipé d'une telle unité
JP2012004078A (ja) * 2010-06-21 2012-01-05 Enplas Corp 発光装置、面光源装置、表示装置及び光束制御部材

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016005872A (ja) * 2014-06-20 2016-01-14 コニカミノルタ株式会社 型装置及び光学素子
WO2018181387A1 (fr) * 2017-03-28 2018-10-04 株式会社エンプラス Élément de commande de flux lumineux, dispositif électroluminescent et procédé de fabrication de dispositif électroluminescent
US10754194B2 (en) 2017-03-28 2020-08-25 Enplas Corporation Luminous flux control member, light-emitting device, and method for producing light-emitting device
WO2019003879A1 (fr) * 2017-06-29 2019-01-03 日本電産サンキョー株式会社 Procédé de production de lentille organique
CN110869831A (zh) * 2017-06-29 2020-03-06 日本电产三协株式会社 塑料透镜的制造方法
US11407188B2 (en) 2017-06-29 2022-08-09 Nidec Sankyo Corporation Manufacturing method of plastic lens

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