JP2019125523A - Light source module and planar light emitting device - Google Patents

Light source module and planar light emitting device Download PDF

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JP2019125523A
JP2019125523A JP2018006455A JP2018006455A JP2019125523A JP 2019125523 A JP2019125523 A JP 2019125523A JP 2018006455 A JP2018006455 A JP 2018006455A JP 2018006455 A JP2018006455 A JP 2018006455A JP 2019125523 A JP2019125523 A JP 2019125523A
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light
light source
source module
incident
scattering
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幹彦 上荷
Mikihiko Ueni
幹彦 上荷
真知子 岩崎
Machiko Iwasaki
真知子 岩崎
真宏 内山
Masahiro Uchiyama
真宏 内山
健太郎 利根
Kentaro Tone
健太郎 利根
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Koha Co Ltd
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Koha Co Ltd
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Priority to JP2018006455A priority Critical patent/JP2019125523A/en
Priority to PCT/JP2019/001469 priority patent/WO2019142909A1/en
Publication of JP2019125523A publication Critical patent/JP2019125523A/en
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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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • 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
    • 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
    • F21V5/02—Refractors for light sources of prismatic 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
    • F21V5/04—Refractors for light sources of lens shape
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof

Abstract

To provide a light source module which can achieve an irradiation range wider than one LED element, and which has suppressed luminance unevenness in the irradiation range.SOLUTION: A light source module 1 includes: a plate-like lens 5 including a first surface 5a, a second surface 5b provided on the opposite side from the first surface 5a, and a side surface 5c; a plurality of recesses 50 formed in the vicinity of the side surface 5c of the first surface 5a of the lens 5; a plurality of LED elements 4 for allowing light to enter the plurality of recesses 50; a plurality of reflection surfaces 51 formed on the position opposing to the plurality of recesses 50 on the second surface 5b of the lens 5, and for reflecting the light which has reached by entering the plurality of recesses 50 mainly in the oblique direction on the first surface 5a side; and a plurality of scattering parts 52 formed on the first surface 5a of the lens 5, for scattering the light reflected in the oblique direction on the plurality of reflection surfaces 51, and for emitting the scattered light from the second surface 5b or the side surface 5c.SELECTED DRAWING: Figure 3

Description

本発明は、複数の発光素子を有する光源モジュール及びそれを用いた面状発光装置に関する。   The present invention relates to a light source module having a plurality of light emitting elements and a planar light emitting device using the same.

従来、ＬＥＤ素子を格子状に配列した面状発光装置が提案されている（例えば、特許文献１参照）。   Conventionally, a planar light emitting device in which LED elements are arranged in a grid is proposed (for example, see Patent Document 1).

特許文献１に記載された面状発光装置は、前面板、背面板及び４つの側面板を有する筐体と、筐体の背面板上に配置され、前面板を照明する複数の面発光モジュールとを備える。面発光モジュールは、長尺状の基板と、基板の長手方向に沿って実装された複数のＬＥＤ素子とを有する。複数の面発光モジュールは、基板の幅方向に所定の間隔を有して背面板上に配置され、照射対象である前面板の直上を照明する、いわゆる直下型のモジュールである。複数の面発光モジュールを基板の幅方向に配置することにより、ＬＥＤ素子は格子状に配列される。   The planar light emitting device described in Patent Document 1 includes a case having a front plate, a back plate and four side plates, and a plurality of surface emitting modules disposed on the back plate of the case and illuminating the front plate. Equipped with A surface emitting module has a long substrate and a plurality of LED elements mounted along the longitudinal direction of the substrate. The plurality of surface emitting modules are so-called direct type modules disposed on the back plate with a predetermined interval in the width direction of the substrate and illuminating directly above the front plate to be irradiated. The LED elements are arranged in a grid by arranging the plurality of surface emitting modules in the width direction of the substrate.

特開２００７−０３６１３２号公報Japanese Patent Application Publication No. 2007-036132

しかし、従来の面状発光装置によると、前面板に対して１つのＬＥＤ素子が照射する範囲はＬＥＤ素子の直上の一定の円形領域となることから、筐体を薄型化すると、ＬＥＤ素子と前面板との距離が短くなり、前面板に輝度むらが現れやすくなる。一方、ＬＥＤ素子の数を増やしてＬＥＤ素子の配列ピッチを小さくすれば、前面板に輝度むらが現れにくくなるが、コスト高を招くことになる。   However, according to the conventional planar light-emitting device, the range irradiated by one LED element on the front plate is a constant circular area directly above the LED element. The distance to the face plate becomes short, and uneven brightness tends to appear on the front plate. On the other hand, if the number of LED elements is increased to reduce the arrangement pitch of the LED elements, uneven brightness is less likely to appear on the front plate, but the cost increases.

そこで、本発明の課題は、１つのＬＥＤ素子よりも広い照射範囲を実現でき、しかも照射範囲における輝度むらを抑制した光源モジュールを提供することにある。   Then, the subject of this invention is providing the light source module which can implement | achieve the irradiation range wider than one LED element, and also suppressed the brightness nonuniformity in the irradiation range.

また、本発明の他の課題は、面状発光装置を薄型化しても、照射対象における輝度むらを抑制した面状発光装置を提供することにある。   Another object of the present invention is to provide a planar light emitting device in which unevenness in luminance on an irradiation target is suppressed even if the planar light emitting device is thinned.

本発明は、上記課題を解決するため、第１の面、前記第１の面と反対側に設けられた第２の面、及び側面を有する板状の透明部材と、
前記透明部材の前記第１の面の前記側面近傍に形成された複数の入射面と、
前記複数の入射面に光を入射させる複数の発光素子と、
前記透明部材の前記第２の面の前記複数の入射面に対向する位置に形成され、前記複数の入射面に入射して到達した光を、主に前記第１の面側の斜め方向に反射する複数の反射面と、
前記透明部材の前記第１の面に形成され、前記複数の反射面で前記斜め方向に反射した光を散乱させ、散乱した光を前記第２の面又は前記側面から外部に出射させる複数の散乱部と、を備えた光源モジュールを提供する。 MEANS FOR SOLVING THE PROBLEMS To solve the above problems, the present invention provides a plate-shaped transparent member having a first surface, a second surface provided on the opposite side to the first surface, and a side surface,
A plurality of incident surfaces formed in the vicinity of the side surface of the first surface of the transparent member;
A plurality of light emitting elements for causing light to be incident on the plurality of incident surfaces;
The light is formed at a position facing the plurality of incident surfaces of the second surface of the transparent member, and the light incident upon reaching the plurality of incident surfaces is mainly reflected in the oblique direction of the first surface. Multiple reflective surfaces,
A plurality of scatterings which are formed on the first surface of the transparent member, scatter the light reflected in the oblique direction by the plurality of reflecting surfaces, and emit the scattered light to the outside from the second surface or the side surface A light source module comprising:

また、本発明は、上記他の課題を解決するため、背面板及び４つの側面板を有する筐体と、
前記筐体の開口に設けられた表示部と、
前記筐体の前記背面板上に格子状に配列され、前記表示部に背面側から照明光を照射する複数の上記光源モジュールと、を備えた面状発光装置を提供する。 Further, in order to solve the above-mentioned other problems, the present invention provides a case having a back plate and four side plates,
A display unit provided at the opening of the housing;
A planar light emitting device comprising: a plurality of the light source modules arranged in a grid on the back plate of the housing and irradiating the display unit with illumination light from the back side.

本発明の光源モジュールによれば、１つのＬＥＤ素子よりも広い照射範囲を実現でき、しかも照射範囲における輝度むらを抑制することができる。
本発明の面状発光装置によれば、面状発光装置を薄型化しても照射対象における輝度むらを抑制することができる。 According to the light source module of the present invention, it is possible to realize an irradiation range wider than one LED element, and to suppress luminance unevenness in the irradiation range.
According to the planar light emitting device of the present invention, even if the planar light emitting device is thinned, it is possible to suppress the uneven brightness on the irradiation target.

図１は、本発明の第１の実施の形態に係る光源モジュールの平面図である。FIG. 1 is a plan view of a light source module according to a first embodiment of the present invention. 図２は、図１に示す光源モジュールの正面図である。FIG. 2 is a front view of the light source module shown in FIG. 図３（ａ）は、図１のＡ−Ａ線断面図、図３（ｂ）は、図３（ａ）のＢ部拡大図である。Fig.3 (a) is the sectional view on the AA line of FIG. 1, FIG.3 (b) is the B section enlarged view of FIG. 3 (a). 図４は、レンズを第１の面側から見た底面図である。FIG. 4 is a bottom view of the lens as viewed from the first surface side. 図５は、ＬＥＤ素子から出射される光の様子を説明するための図である。FIG. 5 is a diagram for explaining the state of light emitted from the LED element. 図６は、変形例１に係る光源モジュールの平面図である。FIG. 6 is a plan view of a light source module according to a first modification. 図７は、本発明の第２の実施の形態に係る広告看板を示し、（ａ）は（ｂ）のＣ−Ｃ線断面図、（ｂ）は（ａ）に示す構成から広告表示部を取り除いた平面図である。FIG. 7 shows an advertisement signboard according to the second embodiment of the present invention, in which (a) is a cross-sectional view taken along the line C-C of (b), and (b) shows an advertisement display unit It is the top view removed. 図８は、基板に形成された点灯回路の一例を示す図である。FIG. 8 is a view showing an example of a lighting circuit formed on a substrate. 図９（ａ）は、比較例に係るレンズの散乱部の配列を説明するための要部平面図、図９（ｂ）は、変形例２に係るレンズの散乱部の配列を説明するための要部平面図である。FIG. 9A is a plan view of an essential part for explaining the arrangement of the scattering parts of the lens according to the comparative example, and FIG. 9B is an illustration for explaining the arrangement of the scattering parts of the lens according to the second modification. It is a principal part top view. 図１０は、実施例の看板と比較例の看板について行ったシミュレーション結果を示す図である。FIG. 10 is a diagram showing simulation results of the signboard of the embodiment and the signboard of the comparative example.

以下、本発明の実施の形態について図面を参照して説明する。なお、各図中、実質的に同一の機能を有する構成要素については、同一の符号を付してその重複した説明を省略する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the drawings, components having substantially the same functions are denoted by the same reference numerals, and redundant description will be omitted.

［第１の実施の形態］
図１は、本発明の第１の実施の形態に係る光源モジュールの平面図、図２は、図１に示す光源モジュールの正面図、図３（ａ）は、図１のＡ−Ａ線断面図、図３（ｂ）は、図３（ａ）のＢ部拡大図である。 First Embodiment
1 is a plan view of a light source module according to a first embodiment of the present invention, FIG. 2 is a front view of the light source module shown in FIG. 1, and FIG. 3 (a) is a sectional view taken along line AA of FIG. FIG. 3 (b) is an enlarged view of a portion B of FIG. 3 (a).

この光源モジュール１は、ベース２と、ベース２の上面２ａに配置された基板３（図３参照）と、基板３に実装された複数のＬＥＤ素子４Ａ、４Ｂ（これらを総称するときは「ＬＥＤ素子４」ともいう。）と、基板３上に配置されたレンズ５とを備える。ＬＥＤ素子４は、発光素子の一例である。なお、発光素子として、例えば、レーザ等の他の素子を用いてもよい。レンズ５は、透明部材の一例である。   The light source module 1 includes a base 2, a substrate 3 (see FIG. 3) disposed on the upper surface 2a of the base 2, and a plurality of LED elements 4A and 4B mounted on the substrate 3 And the lens 5 disposed on the substrate 3. The LED element 4 is an example of a light emitting element. Note that as the light emitting element, for example, another element such as a laser may be used. The lens 5 is an example of a transparent member.

ベース２は、例えば、所定の厚さ（例えば、３ｍｍ）の正方形を有した板状であり、上面２ａ、下面２ｂ、側面２ｃを有する。ベース２の形状を正方形とすることにより、側面２ｃが基準となって光源モジュール１を格子状に配列し易くなる。格子状に配列とは、光源モジュール１を被取付部材上に縦方向及び横方向に配置した状態をいう。ベース２は、例えば、アクリル樹脂、ポリカーボネート樹脂等の樹脂や、アルミニウム等の金属から形成されている。   The base 2 is, for example, a plate having a square with a predetermined thickness (for example, 3 mm), and has an upper surface 2a, a lower surface 2b, and a side surface 2c. By making the shape of the base 2 square, the light source modules 1 can be easily arranged in a grid with the side surface 2 c as a reference. The arrangement in a lattice form means the state where the light source modules 1 are arranged in the longitudinal direction and the lateral direction on the mounting member. The base 2 is formed of, for example, a resin such as an acrylic resin or a polycarbonate resin, or a metal such as aluminum.

ベース２は、図３に示すように、上面２ａに防水構造用の溝２ｄが環状に形成されている。また、ベース２には、光源モジュール１をネジにより被取付部材に取り付けるための穴２ｅ及び長穴２ｆが形成されている。また、ベース２には、ＬＥＤ素子４に電源を供給するためのリード線３５を収容する溝２ｇが形成されている。   As shown in FIG. 3, the base 2 has a groove 2d for waterproof structure formed in a ring shape on the upper surface 2a. Further, the base 2 is formed with a hole 2e and a long hole 2f for attaching the light source module 1 to the mounting member by screws. Further, the base 2 is formed with a groove 2 g for accommodating a lead wire 35 for supplying power to the LED element 4.

基板３は、例えば、所定の厚さ（例えば、１ｍｍ）のガラス基材（例えば、ＦＲ−４等）、エポキシ系・ポリエステル系コンポジット基材（例えば、ＣＥＭ−３等）等の絶縁性の基材に、銅箔等の金属配線がパターニングされたプリント回路基板（ＰＣＢ）である。   The substrate 3 is, for example, an insulating base such as a glass base (for example, FR-4 or the like) having a predetermined thickness (for example, 1 mm) or an epoxy-based / polyester-based composite base (for example, CEM-3 or the like). It is a printed circuit board (PCB) in which metal wiring such as copper foil is patterned on a material.

ＬＥＤ素子４は、レンズ５の第１の面５ａの側面５ｃの近傍に等間隔（例えば、４５°）で複数個（例えば、８個）配列されている。図１に示す場合、ＬＥＤ素子４Ａは、対角方向に配置され、ＬＥＤ素子４Ｂは、上下方向及び左右方向に配置されている。ＬＥＤ素子４は、例えば、フリップチップタイプのものを用いることができる。ＬＥＤ素子４は、例えば、青色ＬＥＤを蛍光体により波長変換して白色を発光可能に構成されたものでもよい。なお、ＬＥＤ素子４の数は、８個に限定されず、４個、６個等の偶数個でもよく、３個、５個等の奇数個でもよい。ＬＥＤ素子４を等間隔で偶数個を配列した場合は、第２の実施の形態で説明する電流制御を行いやすくなる。   A plurality of (for example, eight) LED elements 4 are arranged at equal intervals (for example, 45 °) near the side surface 5 c of the first surface 5 a of the lens 5. In the case shown in FIG. 1, the LED elements 4A are disposed in the diagonal direction, and the LED elements 4B are disposed in the vertical direction and the lateral direction. The LED element 4 can use, for example, a flip chip type. For example, the LED element 4 may be configured to be capable of emitting white light by wavelength conversion of a blue LED with a phosphor. The number of LED elements 4 is not limited to eight, and may be an even number such as four or six, or an odd number such as three or five. When the even number of LED elements 4 are arranged at equal intervals, it becomes easy to perform the current control described in the second embodiment.

（レンズの構成）
レンズ５は、第１の面５ａ、第１の面５ａと反対側に設けられた第２の面５ｂ、及び側面５ｃを有する所定の厚さ（例えば、基板３から上側の厚さが５ｍｍ）の板状の透明部材から構成されている。第１の面５ａ及び第２の面５ｂは、例えば、直径７０ｍｍの円形を有している。 (Lens configuration)
The lens 5 has a first thickness 5a, a second thickness 5b opposite to the first thickness 5a, and a predetermined thickness having a side surface 5c (e.g., a thickness of 5 mm above the substrate 3) It consists of a plate-shaped transparent member. The first surface 5a and the second surface 5b have, for example, a circle having a diameter of 70 mm.

レンズ５は、図３に示すように、第１の面５ａの側面５ｃの近傍に形成され、ＬＥＤ素子４から出射された光が入射する複数の凹部５０と、第２の面５ｂの複数の凹部５０に対向する位置に形成され、複数の凹部５０に入射して到達した光を、主に第１の面５ａ側の斜め方向に反射する複数の反射面５１と、第１の面５ａに形成され、複数の反射面５１で反射して到達した光を散乱させる複数の散乱部５２とを備える。側面５ｃの近傍とは、例えば、第１の面５ａの中心と側面５ｃとの中間位置よりも側面５ｃ寄りの位置をいう。   As shown in FIG. 3, the lens 5 is formed in the vicinity of the side surface 5c of the first surface 5a, and has a plurality of recesses 50 on which the light emitted from the LED element 4 is incident, and a plurality of second surfaces 5b. A plurality of reflecting surfaces 51 which are formed at positions opposed to the recessed portions 50 and which mainly reflect the light incident upon reaching the plurality of recessed portions 50 in the oblique direction on the first surface 5a side, and the first surface 5a And a plurality of scattering portions 52 configured to scatter the light that has been reflected by the plurality of reflecting surfaces 51 and reached. The vicinity of the side surface 5c means, for example, a position closer to the side surface 5c than an intermediate position between the center of the first surface 5a and the side surface 5c.

また、レンズ５は、第１の面５ａに形成され、ベース２に形成された溝２ｄに配置される凸部５３を備える。レンズ５の凸部５３とベース２の溝２ｄとの間にシリコーン樹脂等の接着剤を充填し、レンズ５の凸部５３をベース２に固定する。   In addition, the lens 5 includes a convex portion 53 which is formed on the first surface 5 a and disposed in the groove 2 d formed on the base 2. An adhesive such as silicone resin is filled between the convex portion 53 of the lens 5 and the groove 2 d of the base 2 to fix the convex portion 53 of the lens 5 to the base 2.

凹部５０は、底面を構成する所定の直径（例えば、３．５ｍｍ）の第１入射面５０ａ、及び所定の高さ（例えば、１．４ｍｍ）の側面を構成する第２入射面５０ｂを有する。   The recess 50 has a first incident surface 50a of a predetermined diameter (for example, 3.5 mm) constituting a bottom surface, and a second incident surface 50b constituting a side surface of a predetermined height (for example, 1.4 mm).

反射面５１は、所定の直径（例えば、９ｍｍ）の円形を有し、第１入射面５０ａに入射して到達した光を、主に第１の面５ａ側の斜め方向に反射するように第１入射面５０ａの中心から平面の第２の面５ｂに接続するように漸次広がる漏斗状に形成されている。反射面５１の円は、本実施の形態では、側面５ｃに接しているが、側面５ｃから離間していてもよい。   The reflecting surface 51 has a circular shape with a predetermined diameter (for example, 9 mm), and reflects the light that has entered the first incident surface 50a and reached, mainly in the oblique direction on the first surface 5a side. It is formed in the shape of a funnel which gradually expands so as to be connected to the flat second surface 5b from the center of the one incident surface 50a. The circle of the reflective surface 51 is in contact with the side surface 5c in the present embodiment, but may be separated from the side surface 5c.

レンズ５は、例えば、アクリル樹脂、ポリカーボネート樹脂等の光透過性を有する透明部材から形成されている。   The lens 5 is formed of, for example, a transparent member having light transparency such as an acrylic resin or a polycarbonate resin.

（散乱部の構成）
散乱部５２は、例えば、図３（ａ）、（ｂ）に示すように、空洞部によって構成されている。なお、図３では、散乱部５３を誇張して大きく図示している。散乱部５２の形状は、例えば、円錐状であるが、これに限られず、角錐、円柱、角柱等でもよい。 (Structure of scatterer)
The scattering portion 52 is, for example, constituted by a hollow portion as shown in FIGS. 3 (a) and 3 (b). In addition, in FIG. 3, the scattering part 53 is exaggerated and shown large. The shape of the scattering portion 52 is, for example, a conical shape, but is not limited thereto, and may be a pyramid, a cylinder, a prism, or the like.

次に、散乱部５２の機能を図３（ｂ）を参照して説明する。散乱部５２には、ＬＥＤ素子４から出射され、反射面５１で反射した光や、第２の面５ｂで反射した光等が入射する。図３（ｂ）に示すように、散乱部５２に入射した入射光ａは、様々な方向に散乱する。散乱した光のうち光ｂは、第２の面５ｂから外部に出射する。また、散乱した光のうち光ｃは、第２の面５ｂで反射して再び散乱部５２に入射するか、側面５ｃから外部に出射する。散乱部５２のアスペクト比（高さｈ／直径ｄ）が１に近いと、入射角度と屈折率差から光ｃの光量よりも光ｂの光量が増える。アスペクト比がゼロに近くなると、散乱部５２に入射する光は全反射しやすくなり、光ｃの光量が増えて光ｂの光量が減る。   Next, the function of the scattering unit 52 will be described with reference to FIG. The light emitted from the LED element 4 and reflected by the reflection surface 51, the light reflected by the second surface 5b, and the like enter the scattering portion 52. As shown in FIG. 3B, the incident light a incident on the scattering unit 52 is scattered in various directions. Among the scattered light, the light b is emitted from the second surface 5 b to the outside. Further, among the scattered light, the light c is reflected by the second surface 5 b and enters the scattering portion 52 again, or is emitted to the outside from the side surface 5 c. When the aspect ratio (height h / diameter d) of the scattering portion 52 is close to 1, the light amount of the light b increases more than the light amount of the light c from the incident angle and the refractive index difference. When the aspect ratio approaches zero, the light incident on the scattering section 52 is easily totally reflected, and the light amount of the light c increases and the light amount of the light b decreases.

散乱部５２のアスペクト比（ｈ／ｄ）は、１．５以上又は２以上とするのが好ましい。アスペクト比が１．５未満だと、第２の面５ｂの中心部に到達する光量が増減し、この結果、第２の面５ｂの中心部から上方に出射する光量も増減し、第２の面５ｂの中心部に輝度むらが発生しやすくなる。散乱部５２は、例えば、直径ｄは６００〜６５０μｍ、高さｈは１２００〜１３００μｍである。   The aspect ratio (h / d) of the scattering portion 52 is preferably 1.5 or more or 2 or more. If the aspect ratio is less than 1.5, the amount of light reaching the central portion of the second surface 5b increases or decreases, and as a result, the amount of light emitted upward from the central portion of the second surface 5b also increases or decreases. Uneven luminance is likely to occur at the center of the surface 5b. The scattering portion 52 has, for example, a diameter d of 600 to 650 μm and a height h of 1200 to 1300 μm.

図４は、レンズ５を第１の面５ａ側から見た底面図である。レンズ５の第１の面５ａは、中心から側面５ｃに向かって散乱部５２の密度が大きくなる異なる複数の領域、例えば、第１の領域５３ａ及び第２の領域５３ｂを有する。第１の領域５３ａにおける散乱部５２の密度は、例えば、０．３個／ｍｍ２であり、第２の領域５３ｂは、例えば、０．９個／ｍｍ２である。散乱部５２の密度を大きくすることにより、図３（ｂ）に示す光ｃよりも光ｂの割合が大きくなる傾向にある。また、側面５ｃから外部に出射する光が側面５ｃの曲率によって集光し、ＬＥＤ素子４の位置に対応した筋状の輝度むらが発生するが、散乱部５２の密度を、内側の第１の領域５３ａよりも外側の第２の領域５３ｂを大きくすることにより、筋状の輝度むらを抑制することができる。また、外側の密度を大きくした方が、光源モジュール１としての配光が滑らかな正規分布に近くなり、看板内に複数個を格子状に並べた際に輝度むらが抑制される。また、散乱部５２のアスペクト比及び密度を変えることにより、上方への出射光量と水平方向に伝搬する光量との割合を制御することができる。 FIG. 4 is a bottom view of the lens 5 as viewed from the first surface 5a side. The first surface 5a of the lens 5 has a plurality of different regions, for example, a first region 53a and a second region 53b, in which the density of the scattering portions 52 increases from the center toward the side surface 5c. The density of the scattering portions 52 in the first region 53a is, for example, 0.3 pieces / mm 2 , and the second region 53b is, for example, 0.9 pieces / mm 2 . By increasing the density of the scattering part 52, the ratio of the light b tends to be larger than the light c shown in FIG. 3 (b). In addition, light emitted to the outside from the side surface 5c is condensed by the curvature of the side surface 5c, and streaky luminance unevenness corresponding to the position of the LED element 4 is generated. By making the second region 53b outside the region 53a larger, it is possible to suppress streaky luminance unevenness. Further, when the density on the outside is increased, the light distribution as the light source module 1 becomes close to a smooth normal distribution, and when plural pieces are arranged in a grid shape, uneven brightness is suppressed. Further, by changing the aspect ratio and the density of the scattering portion 52, it is possible to control the ratio between the amount of light emitted upward and the amount of light propagating in the horizontal direction.

なお、第１の領域５３ａと第２の領域５３ｂとの間に散乱部５２が存在しない領域があってもよい。散乱部５２の密度が異なる領域は、２つに限られず、３つ以上でもよい。   There may be a region where the scattering portion 52 does not exist between the first region 53a and the second region 53b. The area where the density of the scattering portion 52 is different is not limited to two, and may be three or more.

（光源モジュールの動作）
図５は、ＬＥＤ素子４から出射される光の様子を説明するための図である。リード線３５を介して各ＬＥＤ素子４Ａ、４Ｂに同一の電流を供給すると、各ＬＥＤ素子４Ａ、４Ｂからほぼ同一の光量の光が出射される。 (Operation of light source module)
FIG. 5 is a view for explaining the state of light emitted from the LED element 4. When the same current is supplied to the LED elements 4A and 4B through the lead wires 35, light having substantially the same light quantity is emitted from the LED elements 4A and 4B.

図５に示すように、ＬＥＤ素子４Ｂから光が出射されると、様々な方向に光ｉ〜ｖが出射される。光ｉは、第１入射面５０ａに入射した後、反射面５１に到達し、反射面５１で反射して散乱部５２の方向に進む。光iiは、第１入射面５０ａに入射した後、反射面５１を透過して外部に出射する。光iiiは、第２入射面５０ｂに入射した後、第２の面５ｂで反射した後、散乱部５２又は側面５ｃの方向に進む。光ivは、第２入射面５０ｂに入射した後、側面５ｃに直接到達し、側面５ｃから外部に出射する。光ｖは、第１入射面５０ａに入射した後、反射面５１で反射して側面５ｃから外部に出射する。   As shown in FIG. 5, when light is emitted from the LED element 4 </ b> B, lights i to v are emitted in various directions. The light i enters the first incident surface 50 a and then reaches the reflective surface 51, is reflected by the reflective surface 51, and travels in the direction of the scattering unit 52. The light ii is incident on the first incident surface 50a, and then transmits through the reflecting surface 51 and exits to the outside. The light iii is incident on the second incident surface 50b and then reflected by the second surface 5b, and then travels in the direction of the scattering portion 52 or the side surface 5c. After entering the second incident surface 50b, the light iv directly reaches the side surface 5c and exits from the side surface 5c. The light v is incident on the first incident surface 50a, and then is reflected by the reflection surface 51 and emitted from the side surface 5c to the outside.

光ｉや光iiiは、図１においてレンズ５の中心に向かう。図４に示す第２の領域５３ｂの散乱部５２に到達した光は、一部の光は第２の面５ｂから外部に出射し、一部の光は第１の領域５３ａの散乱部５２に到達する。レンズ５の第２の面５ｂ全体が出射面となり、光源モジュール１の直上の照射範囲の輝度むらが抑制される。   The light i and the light iii are directed to the center of the lens 5 in FIG. In the light reaching the scattering portion 52 of the second region 53b shown in FIG. 4, part of the light is emitted to the outside from the second surface 5b, and part of the light is scattered to the scattering portion 52 of the first region 53a. To reach. The entire second surface 5 b of the lens 5 serves as the exit surface, and luminance unevenness in the irradiation range immediately above the light source module 1 is suppressed.

（第１の実施の形態の作用、効果）
本実施の形態の光源モジュール１によれば、以下の作用、効果を奏する。
（１）レンズ５の側面５ｃ近傍に配置されたＬＥＤ素子４から出射された光は、散乱部５２の機能により、一部の光が第２の面５ｂから上方に出射しつつレンズ５の中心部まで伝搬することから、第２の面５ｂ全体が出射面となり、光源モジュール１の直上の照射範囲の輝度むらを抑制することができる。
（２）散乱部５２のアスペクト比及び密度により、上方への出射光量と水平方向に伝搬する光量との割合を制御することができることから、直上の照射範囲の輝度むらを抑制したレンズ５の設計の自由度が高くなる。
（３）第２の面５ｂ全体が出射面となり、見掛けの光源を大きくすることができる。 (Operation and effect of the first embodiment)
According to the light source module 1 of the present embodiment, the following operation and effects can be obtained.
(1) The light emitted from the LED element 4 disposed in the vicinity of the side surface 5c of the lens 5 is the center of the lens 5 while part of the light is emitted upward from the second surface 5b by the function of the scattering portion 52 By propagating to the portion, the entire second surface 5 b is the exit surface, and it is possible to suppress luminance unevenness in the irradiation range immediately above the light source module 1.
(2) Since the ratio between the amount of light emitted upward and the amount of light propagating in the horizontal direction can be controlled by the aspect ratio and density of the scattering portion 52, the design of the lens 5 in which the uneven brightness in the irradiation range immediately above is suppressed Degree of freedom increases.
(3) The entire second surface 5b is an exit surface, and the apparent light source can be enlarged.

＜変形例１＞
図６は、変形例１に係る光源モジュールの平面図である。第１の実施の形態に係る光源モジュール１は、レンズ５の第２の面５ｂの形状を円形としたが、変形例１の光源モジュール１は、矩形状としたものである。ＬＥＤ素子４は、レンズ５の側面５ｃに沿って配置されている。このようなレンズ５の形状やＬＥＤ素子４の配置としても、第１の実施の形態と同様の光学特性を得ることができる。 <Modification 1>
FIG. 6 is a plan view of a light source module according to a first modification. In the light source module 1 according to the first embodiment, the shape of the second surface 5b of the lens 5 is circular, but the light source module 1 of the first modification is rectangular. The LED element 4 is disposed along the side surface 5 c of the lens 5. Even with the shape of the lens 5 and the arrangement of the LED element 4, optical characteristics similar to those of the first embodiment can be obtained.

［第２の実施の形態］
図７は、本発明の第２の実施の形態に係る広告看板を示し、（ａ）は（ｂ）のＣ−Ｃ線断面図、（ｂ）は（ａ）に示す構成から広告表示部を取り除いた平面図である。 Second Embodiment
FIG. 7 shows an advertisement signboard according to the second embodiment of the present invention, in which (a) is a cross-sectional view taken along the line C-C of (b), and (b) shows an advertisement display unit from the configuration shown in (a). It is the top view removed.

この広告看板１００は、開口１１１を有する略箱型の筐体１１０と、開口１１１に設けられた広告表示部１２０と、筐体１１０の背面板１１２に格子状に配列されて取り付けられ、広告表示部１２０に背面側から照明光を照射する複数の光源モジュール１とを備える。広告看板１００は、面状発光装置の一例である。   The advertising billboard 100 is arranged in a lattice shape on a substantially box-shaped casing 110 having an opening 111, an advertisement display unit 120 provided in the opening 111, and a back plate 112 of the casing 110, and the advertisement is displayed The light source module 1 includes a plurality of light source modules 1 that irradiate the illumination light from the back side to the portion 120. The advertising billboard 100 is an example of a planar light emitting device.

筐体１１０は、図７（ａ）に示すように、背面板１１２と、４つの側面板１１３と、開口１１１に配置された広告表示部１２０とを備える。   As shown in FIG. 7A, the housing 110 includes a back plate 112, four side plates 113, and an advertisement display unit 120 disposed in the opening 111.

筐体１１０は、アルミニウム等の金属、又はポリカーボネート等の樹脂から形成されている。背面板１１２及び側面板１１３の内面に、光の反射効率を高めるため、アルミニウムシート等の金属シートを貼り付けてもよい。なお、金属シートの代わりに、白色塗装を施してもよく、筐体１１０を白色の樹脂材料から形成してもよい。   The housing 110 is formed of a metal such as aluminum or a resin such as polycarbonate. A metal sheet such as an aluminum sheet may be attached to the inner surface of the back plate 112 and the side plate 113 in order to enhance the light reflection efficiency. In addition, white coating may be applied instead of the metal sheet, and the case 110 may be formed of a white resin material.

広告表示部１２０は、例えば、広告板１２２を保護する透明樹脂、透明ガラス等からなる透明板１２１と、広告が印刷された広告板１２２と、透明樹脂、透明ガラス等からなり、表面又は裏面に微細な凹凸を有して入射光を散乱させる散乱板１２３とを積層して構成されている。なお、散乱板１２３は、散乱材入りの樹脂板を用いてもよい。   The advertisement display unit 120 is made of, for example, a transparent resin for protecting the advertisement plate 122, a transparent plate 121 made of transparent glass, etc., an advertisement plate 122 on which an advertisement is printed, transparent resin, transparent glass, etc. It is configured by laminating a scattering plate 123 which has fine irregularities and scatters incident light. The scattering plate 123 may be a resin plate containing a scattering material.

光源モジュール１は、図７（ｂ）に示すように、ベース２の側面２ｃが隣の光源モジュール１のベース２の側面２ｃに接触するように背面板１１２にネジ止めされている。なお、光源モジュール１は、ベース２の間に隙間を設けて配列してもよい。   The light source module 1 is screwed to the back plate 112 such that the side surface 2c of the base 2 is in contact with the side surface 2c of the base 2 of the adjacent light source module 1 as shown in FIG. 7B. The light source modules 1 may be arranged with gaps between the bases 2.

図８は、基板３に形成された点灯回路の一例を示す図である。点灯回路３０は、入力端子３１ａ〜３１ｄと、直列に接続された４つのＬＥＤ素子４Ａと、直列接続した２つのＬＥＤ素子４Ｂが並列に接続された４つのＬＥＤ素子４Ｂと、ＬＥＤ４Ａ、４Ｂへの電流を調整する複数の抵抗３２、３３と、ダイオード素子３４とを備える。図１に示すリード線３５を介して点灯回路３０の入力端子３１ａ〜３１ｄに電源を供給すると、図１において対角方向に配置されたＬＥＤ素子４Ａは、他のＬＥＤ素子４Ｂの２倍の電流が流れ、ＬＥＤ素子４Ａは、ＬＥＤ素子４Ｂの約２倍の光量の光を出射する。   FIG. 8 is a view showing an example of the lighting circuit formed on the substrate 3. The lighting circuit 30 includes input terminals 31a to 31d, four LED elements 4A connected in series, four LED elements 4B in which two LED elements 4B connected in series are connected in parallel, and the LEDs 4A and 4B. A plurality of resistors 32 and 33 for adjusting current and a diode element 34 are provided. When power is supplied to the input terminals 31a to 31d of the lighting circuit 30 through the lead wires 35 shown in FIG. 1, the LED elements 4A arranged in the diagonal direction in FIG. 1 have twice the current of the other LED elements 4B. , And the LED element 4A emits light with a light quantity about twice that of the LED element 4B.

（広告看板の動作）
リード線３５を介して各光源モジュール１のＬＥＤ素子４ＡにＬＥＤ素子４Ｂの２倍の電流を供給すると、ＬＥＤ素子４ＡはＬＥＤ素子４Ｂの約２倍の光量の光を出射する。このため、光源モジュール１の対角方向の間に対応する広告表示部１２０の箇所における輝度が光源モジュール１の縦方向及び横方向の間に対応する広告表示部１２０の箇所における輝度とほぼ等しくなる。 (Operation of advertising billboard)
When a current twice as large as that of the LED element 4B is supplied to the LED element 4A of each light source module 1 through the lead wire 35, the LED element 4A emits light with a light quantity about twice that of the LED element 4B. For this reason, the luminance at the portion of the advertisement display unit 120 corresponding to the diagonal direction of the light source module 1 is substantially equal to the luminance at the portion of the advertisement display unit 120 corresponding to the vertical direction and the lateral direction of the light source module 1. .

また、第１の実施の形態に係る光源モジュール１の動作でも説明したように、レンズ５の側面５ｃ近傍に配置されたＬＥＤ素子４から出射された光は、散乱部５２の機能により、一部の光が第２の面５ｂから上方に出射しつつレンズ５の中心部まで伝搬することから、第２の面５ｂ全体が出射面となる。   In addition, as described in the operation of the light source module 1 according to the first embodiment, the light emitted from the LED element 4 disposed in the vicinity of the side surface 5 c of the lens 5 is partially affected by the function of the scattering unit 52. The light from the second surface 5 b is emitted upward and propagates to the central portion of the lens 5, so that the entire second surface 5 b is an exit surface.

このため、光源モジュール１の上方の広告表示部１２０の照射範囲は輝度むらが抑制される。光源モジュール１から上方に出射した光は直接広告表示部１２０に到達し、一部は筐体１１０の側面板１１３や背面板１１２の内面で反射して広告表示部１２０に到達する。このようにして広告表示部１２０が明るく照らされ、広告内容を認識することができる。   For this reason, uneven brightness is suppressed in the irradiation range of the advertisement display unit 120 above the light source module 1. The light emitted upward from the light source module 1 directly reaches the advertisement display unit 120, and a part of the light is reflected on the inner surface of the side plate 113 and the back plate 112 of the housing 110 to reach the advertisement display unit 120. In this manner, the advertisement display unit 120 is brightly illuminated, and the advertisement content can be recognized.

（第２の実施の形態の作用、効果）
本実施の形態の広告看板１００によれば、以下の作用、効果を奏する。
（１）対角方向のＬＥＤ素子４ＡをＬＥＤ素子４Ｂよりも多い光量の光を出射させているので、光源モジュール１の対角方向の間に対応する広告表示部１２０の箇所における輝度が光源モジュール１の縦方向及び横方向の間に対応する広告表示部１２０の箇所における輝度とほぼ等しくなる。この結果、広告看板１００を薄型化しても、広告表示部１２０の輝度むらを抑制することができる。
（２）光源モジュール１を背面板１１２上に設置することで、８個のＬＥＤ素子４を設置したことになるので、ＬＥＤ素子４を個々に設置する場合と比較して設置作業が容易になる。 (Operation and effect of the second embodiment)
According to the advertising billboard 100 of the present embodiment, the following operation and effects are achieved.
(1) Since the LED elements 4A in the diagonal direction emit light of a light quantity larger than that of the LED elements 4B, the luminance at the portion of the advertisement display portion 120 corresponding to the diagonal direction of the light source module 1 is the light source module The luminance at the corresponding portion of the advertisement display unit 120 between the vertical direction and the horizontal direction of 1 is approximately equal. As a result, even if the advertising billboard 100 is thinned, it is possible to suppress the luminance unevenness of the advertising display unit 120.
(2) By installing the light source module 1 on the back plate 112, the eight LED elements 4 are installed, which facilitates the installation work as compared with the case where the LED elements 4 are individually installed. .

＜変形例２＞
図９（ａ）は、比較例に係るレンズ５の散乱部５２の配列を説明するための要部平面図、図９（ｂ）は、変形例２に係るレンズ５の散乱部５２の配列を説明するための要部平面図である。図９中、黒丸で示しているのは、散乱部５２である。 <Modification 2>
FIG. 9A is a plan view of an essential part for explaining the arrangement of the scattering portions 52 of the lens 5 according to the comparative example, and FIG. 9B is an arrangement of the scattering portions 52 of the lens 5 according to the second modification. It is a principal part top view for explaining. In FIG. 9, the scattering portion 52 is shown by a black circle.

図９（ａ）に示す比較例は、対角方向（４５°方向）のピッチｐを所定の値（例えば、１ｍｍ）とした六方配列により散乱部５２を配列したものである。図９（ｂ）に示す変形例２は、縦方向及び横方向のピッチｐを図９（ａ）と同じ値（例えば、１ｍｍ）として散乱部５２を格子配列により配列したものである。すなわち、変形例２は、光源モジュール１を格子状に配列した場合に、散乱部５２の対角方向のピッチを他の方向のピッチよりも大きくなるように配列したものである。   In the comparative example shown in FIG. 9A, the scattering portions 52 are arranged in a hexagonal arrangement in which the pitch p in the diagonal direction (45 ° direction) is a predetermined value (for example, 1 mm). The second modification shown in FIG. 9B is an arrangement in which the scattering portions 52 are arranged in a lattice arrangement with the pitch p in the longitudinal direction and the lateral direction being the same value (for example, 1 mm) as in FIG. 9A. That is, in the second modification, when the light source modules 1 are arranged in a lattice, the pitch of the scattering portions 52 in the diagonal direction is arranged to be larger than the pitch in the other direction.

対角方向の散乱部５２の間隔ｄは、図９（ｂ）に示す格子配列とすることにより、図９（ａ）に示す六方配列の場合よりも広くなり、散乱部５２に入射した光が対角方向に伝搬しやすくなり、対角方向の輝度を上げることが可能になる。したがって、第２の実施の形態のように対角方向に位置するＬＥＤ素子４Ａに供給する電流を縦方向及び横方向に位置するＬＥＤ素子４Ｂに供給する電流の２倍まで大きくしなくても、又は両者への電流を等しくしても、対角方向の輝度むらを抑制することができる。   The spacing d of the scattering portions 52 in the diagonal direction becomes wider than in the case of the hexagonal array shown in FIG. 9A by setting the lattice arrangement shown in FIG. 9B, and the light incident on the scattering portions 52 It becomes easy to propagate in the diagonal direction, and it becomes possible to increase the luminance in the diagonal direction. Therefore, even if the current supplied to the LED elements 4A located in the diagonal direction as in the second embodiment is not increased to twice the current supplied to the LED elements 4B located in the vertical direction and the horizontal direction, Or even if the current to both is equal, it is possible to suppress the uneven brightness in the diagonal direction.

（シミュレーション）
図１０は、実施例の看板と比較例の看板について行ったシミュレーション結果を示す図である。シミュレーションで用いた看板を説明する。看板のサイズは、底面（内寸）を３００ｍｍ×３００ｍｍ、高さ（内寸）を３０ｍｍとした。光源モジュール１のレイアウトは、ピッチＰを１００ｍｍ、５行×５列の格子状の配列とした。ただし、図９では、簡略化して示すため、３行×３列の配列とした。広告表示部１２０における中央の点をＡ点、Ａ点から横方向に５０ｍｍ移動した点（中央の光源モジュール１と右隣の光源モジュール１との中間点）をＢ点、Ａ点から対角方向に７０．５ｍｍ移動した点（中央の光源モジュール１と右上隣の光源モジュール１との中間点）をＣ点とする。 (simulation)
FIG. 10 is a diagram showing simulation results of the signboard of the embodiment and the signboard of the comparative example. Explain the signboard used in the simulation. As for the size of the signboard, the bottom surface (inner size) was 300 mm × 300 mm, and the height (inner size) was 30 mm. In the layout of the light source module 1, the pitch P is 100 mm, and is a grid array of 5 rows × 5 columns. However, in order to simplify and show in FIG. 9, it is set as the arrangement | sequence of 3 rows x 3 columns. A point at the center of the advertisement display unit 120 moved 50 mm laterally from the point A (point halfway between the light source module 1 at the center and the light source module 1 next to the right) at point B, diagonal direction from the point A The point moved by 70.5 mm (the middle point between the light source module 1 at the center and the light source module 1 adjacent to the upper right) is taken as a point C.

比較例では、光源モジュール１の各ＬＥＤ素子４に同一の電流値（３０ｍＡ）を供給した。実施例では、縦方向及び横方向に配置したＬＥＤ素子４Ｂに１５ｍＡを供給し、対角方向に配置したＬＥＤ素子４Ｂに３０ｍＡを供給した。   In the comparative example, the same current value (30 mA) was supplied to each LED element 4 of the light source module 1. In the embodiment, 15 mA is supplied to the LED elements 4B arranged in the longitudinal direction and the lateral direction, and 30 mA is supplied to the LED elements 4B arranged in the diagonal direction.

比較例では、Ｃ点の照度がＢ点の照度よりも小さいため、照度比Ｃ／Ｂが０．９７であった。一方、実施例では、Ｃ点の照度がＢ点の照度とほぼ等しくなったため、照度比Ｃ／Ｂが１．００に改善された。   In the comparative example, since the illuminance at the point C is smaller than the illuminance at the point B, the illuminance ratio C / B was 0.97. On the other hand, in the example, since the illuminance at the point C was almost equal to the illuminance at the point B, the illuminance ratio C / B was improved to 1.00.

本実施例によれば、看板係数＝筐体の高さ（内寸）／光源モジュールのピッチＰ＝３０ｍｍ／１００ｍｍ＝０．３という小さい値を実現することができた。   According to this embodiment, it is possible to realize the small value of the signboard coefficient = the height of the case (inner size) / the pitch of the light source module = 30 mm / 100 mm = 0.3.

なお、本発明の実施の形態は、上記各実施の形態に限定されるものではなく、本発明の要旨を変更しない範囲内で種々に変形、実施が可能である。   The embodiments of the present invention are not limited to the above-described embodiments, and various changes and modifications can be made without departing from the scope of the present invention.

また、本発明の要旨を変更しない範囲内で、上記各実施の形態の構成要素の一部を省くことが可能である。   Further, within the scope of the present invention, it is possible to omit some of the components of the above-described embodiments.

１…光源モジュール、２…ベース、２ａ…上面、２ｂ…下面、２ｃ…側面、２ｄ…溝、２ｅ…穴、２ｆ…長穴、２ｇ…溝、３…基板、４、４Ａ、４Ｂ…ＬＥＤ素子、５…レンズ、５ａ…第１の面、５ｂ…第２の面、５ｃ…側面、３０…点灯回路、３１ａ-３１ｄ…入力端子、３２…抵抗、３４…ダイオード素子、３５…リード線、５０…凹部、５０ａ…第１入射面、５０ｂ…第２入射面、５１…反射面、５２…散乱部、５３…凸部、５３ａ…第１の領域、５３ｂ…第２の領域、１００…広告看板、１１０…筐体、１１１…開口、１１２…背面板、１１３…側面板、１２０…広告表示部、１２１…透明板、１２２…広告板、１２３…散乱板 DESCRIPTION OF SYMBOLS 1 ... Light source module, 2 ... Base, 2a ... Upper surface, 2b ... Lower surface, 2c ... Side, 2d ... Groove, 2e ... Hole, 2f ... Long hole, 2g ... Groove, 3 ... board | substrate, 4, 4A, 4B ... LED element 5 lens 5a first surface 5b second surface 5c side 30 lighting circuit 31a-31d input terminal 32 resistance 34 diode element 35 lead wire 50 ... Recesses 50a: first incident surface 50b: second incident surface 51: reflection surface 52: scattering portion 53: convex portion 53a: first region 53b: second region 100: advertising signboard , 110: housing, 111: opening, 112: back plate, 113: side plate, 120: advertising display portion, 121: transparent plate, 122: advertising plate, 123: scattering plate

Claims (6)

第１の面、前記第１の面と反対側に設けられた第２の面、及び側面を有する板状の透明部材と、
前記透明部材の前記第１の面の前記側面近傍に形成された複数の入射面と、
前記複数の入射面に光を入射させる複数の発光素子と、
前記透明部材の前記第２の面の前記複数の入射面に対向する位置に形成され、前記複数の入射面に入射して到達した光を、主に前記第１の面側の斜め方向に反射する複数の反射面と、
前記透明部材の前記第１の面に形成され、前記複数の反射面で前記斜め方向に反射した光を散乱させ、散乱した光を前記第２の面又は前記側面から外部に出射させる複数の散乱部と、
を備えた光源モジュール。 A plate-like transparent member having a first surface, a second surface provided opposite to the first surface, and a side surface;
A plurality of incident surfaces formed in the vicinity of the side surface of the first surface of the transparent member;
A plurality of light emitting elements for causing light to be incident on the plurality of incident surfaces;
The light is formed at a position facing the plurality of incident surfaces of the second surface of the transparent member, and the light incident upon reaching the plurality of incident surfaces is mainly reflected in the oblique direction of the first surface. Multiple reflective surfaces,
A plurality of scatterings which are formed on the first surface of the transparent member, scatter the light reflected in the oblique direction by the plurality of reflecting surfaces, and emit the scattered light to the outside from the second surface or the side surface Department,
Light source module equipped with 前記散乱部は、アスペクト比（高さｈ／直径ｄ）が１．５以上の空洞部によって構成された、
請求項１に記載の光源モジュール。 The scattering portion is constituted by a cavity having an aspect ratio (height h / diameter d) of 1.5 or more.
The light source module according to claim 1. 前記透明部材の前記第１の面は、中心から前記側面に向かって前記散乱部の密度が大きくなる複数の領域を有する、
請求項１又は２に記載の光源モジュール。 The first surface of the transparent member has a plurality of regions in which the density of the scattering portion increases from the center toward the side surface.
The light source module according to claim 1. 当該光源モジュールを格子状に配列した場合に、前記複数の散乱部は、対角方向のピッチを他の方向のピッチよりも大きくなるように配列された請求項１から３のいずれか１項の記載の光源モジュール。   4. The light source module according to any one of claims 1 to 3, wherein when the light source modules are arranged in a grid, the plurality of scattering portions are arranged such that the pitch in the diagonal direction is larger than the pitch in the other direction. Light source module as described. 前記複数の発光素子のうち、当該光源モジュールを格子状に配列した場合に、対角方向に位置する前記発光素子を他の発光素子よりも大きい電流を供給する回路、をさらに備えた、
請求項１から４のいずれか１項に記載の光源モジュール。 Among the plurality of light emitting elements, when the light source modules are arranged in a grid, the circuit further includes a circuit that supplies a larger current than the other light emitting elements positioned in the diagonal direction.
The light source module according to any one of claims 1 to 4. 背面板及び４つの側面板を有する筐体と、
前記筐体の開口に設けられた表示部と、
前記筐体の前記背面板上に格子状に配列され、前記表示部に背面側から照明光を照射する請求項１から５のいずれか１項に記載の複数の光源モジュールと、
を備えた面状発光装置。 A housing having a back plate and four side plates;
A display unit provided at the opening of the housing;
The plurality of light source modules according to any one of claims 1 to 5, wherein the plurality of light source modules are arranged in a lattice on the back plate of the housing, and illuminate the display unit with illumination light from the back side.
Planar light-emitting device equipped with
JP2018006455A 2018-01-18 2018-01-18 Light source module and planar light emitting device Pending JP2019125523A (en)

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