# US 9,752,750 B2 · Method of manufacturing light flux controlling member

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- Number: US 9,752,750 B2
- Document ID: US9752750B2
- Status: Granted
- Kind: B2
- Application number: 15/372,429
- Filed: 2016-12-08
- Published: 2017-03-30
- Granted: 2017-09-05
- Earliest claimed: 2009-04-27
- Assignees: Enplas Corporation
- Applicants: Enplas Corporation
- Inventors: Masao Yamaguchi; Yasuyuki Fukuda
- Web page: https://patentgrep.com/patent/US9752750B2

## CPC

- F21V 5/04: of lens shape
- B29D 11/0048: {Moulds for lenses (moulds for plastic articles in general B29C33/00)}
- B29D 11/0074: {Production of other optical elements not provided for in B29D11/00009- B29D11/0073}
- F21V 13/02: Combinations of only two kinds of elements
- G02B 3/0037: {characterized by the distribution or form of lenses}
- G02B 3/04: with continuous faces that are rotationally symmetrical but deviate from a true sphere {, e.g. so called "aspheric" lenses}
- G02B 5/0215: {the surface having a regular structure}
- G02B 5/0278: {used in transmission}
- G02B 19/0028: {refractive and reflective surfaces, e.g. non-imaging catadioptric systems}
- G02B 19/0066: {in the form of an LED array}
- G02F 1/133603: {with LEDs}
- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- B29K 2033/12: {Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate}
- B29K 2069/00: Use of PC, i.e. polycarbonates {or derivatives thereof}, as moulding material
- B29K 2105/20: Inserts
- F21Y 2105/16: square or rectangular, e.g. for light panels
- F21Y 2115/10: Light-emitting diodes [LED]
- G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses}
- H10H 20/855: Optical field-shaping means, e.g. lenses
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- 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
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

A light flux controlling member includes a concavity on which light is incident on, a light control/emission surface that controls a traveling direction of light incident on the concavity, and a back surface that extends in a radial direction from an opening rim part of the concavity. One of a grid convex part which arranges a plurality of strips of convex parts in a grid pattern and a grid concave part which arranges a plurality of strips of concave parts in a grid pattern is formed in the back surface. A method of manufacturing the light flux controlling member includes forming one of the grid convex part and the grid concave part integrally with a main body of the light flux controlling member by integral molding using a mold having a shape corresponding to one of the grid convex part and the grid concave part.

## Claims

### Claim 1

A method of manufacturing a light flux controlling member including a concavity on which light emitted from a light emitting element is incident on, a light control/emission surface that controls a traveling direction of light incident on the concavity, and a back surface that extends in a radial direction from an opening rim part of the concavity, wherein one of a grid convex part which arranges a plurality of strips of convex parts in a grid pattern and a grid concave part which arranges a plurality of strips of concave parts in a grid pattern is formed in the back surface, the method comprising,
forming one of the grid convex part and the grid concave part integrally with a main body of the light flux controlling member by integral molding using a mold having a shape corresponding to one of the grid convex part and the grid concave part.

### Claim 2 (depends on 1)

The method of manufacturing the light flux controlling member according to claim 1, wherein a part of the mold is roughened, the part corresponding to one of the grid convex part and the grid concave part.