JP2015153477A - Light-emitting device and manufacturing method of the same - Google Patents

Light-emitting device and manufacturing method of the same Download PDF

Info

Publication number
JP2015153477A
JP2015153477A JP2014023866A JP2014023866A JP2015153477A JP 2015153477 A JP2015153477 A JP 2015153477A JP 2014023866 A JP2014023866 A JP 2014023866A JP 2014023866 A JP2014023866 A JP 2014023866A JP 2015153477 A JP2015153477 A JP 2015153477A
Authority
JP
Japan
Prior art keywords
light
distribution
intensity distribution
emitting device
diffusion plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2014023866A
Other languages
Japanese (ja)
Other versions
JP6187292B2 (en
Inventor
由紀子 籔田
Yukiko Yabuta
由紀子 籔田
伊藤　浩史
Hiroshi Ito
浩史 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP2014023866A priority Critical patent/JP6187292B2/en
Publication of JP2015153477A publication Critical patent/JP2015153477A/en
Application granted granted Critical
Publication of JP6187292B2 publication Critical patent/JP6187292B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Planar Illumination Modules (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting device having a structure capable of improving uniformity of light-emitting intensity distribution in a simple manner at low cost, and a manufacturing method of the same.SOLUTION: A manufacturing method of a light-emitting device 1 according to an aspect of the present invention includes the steps of: preparing a plurality of light-emitting elements 11 installed on a substrate 10; forming a light intensity distribution adjustment layer 14 comprising a transparent material including a colored substance by dot printing on one surface 13s of a diffusion plate 13 for diffusing light 12 emitted from the plurality of light-emitting elements 11; and installing the diffusion plate 13 so that the surface 13s faces the plurality of light-emitting elements 11. The light intensity distribution adjustment layer 14 is formed so as to have distribution of permeability or diffusibility on the surface 13s according to the distribution of the intensity of the light 12 on the surface 13s, and improves uniformity of the intensity distribution of the light 12 emitted from the diffusion plate 13.

Description

本発明は、発光装置及びその製造方法に関する。   The present invention relates to a light emitting device and a method for manufacturing the same.

従来、複数の発光素子を有する装置であって、輝度分布の均一性を向上させるための部材を有するものが知られている（例えば、特許文献１、２参照）。   2. Description of the Related Art Conventionally, an apparatus having a plurality of light emitting elements and having a member for improving the uniformity of luminance distribution is known (see, for example, Patent Documents 1 and 2).

特許文献１に開示された照明装置は、ＬＥＤ光源に対応する位置に同心円プリズムが形成された透明基材からなる光制御板を有する。この照明装置によれば、光制御板によって各々のＬＥＤ光源からの光を所定の角度範囲に均一に照射することができ、それによって照明装置の輝度分布が良好になるとされている。   The illumination device disclosed in Patent Document 1 has a light control plate made of a transparent base material in which concentric circular prisms are formed at positions corresponding to LED light sources. According to this illuminating device, light from each LED light source can be uniformly irradiated in a predetermined angle range by the light control plate, and thereby the luminance distribution of the illuminating device is improved.

特許文献２に開示された面状照明装置は、複数の突起からなる微細構造部が形成された構造面を有する透過率分布シートと、光を拡散させつつ透過させる指向性補償シートを有する。この面状照明装置によれば、透過率分布シートによりＬＥＤから発せられる光の照度分布の不均一性を打ち消し、さらに指向性補償シートにより光の指向性分布の不均一性を補償することができ、それによって面状照明装置の輝度ムラを適正レベルに抑えることができるとされている。   The planar illumination device disclosed in Patent Document 2 includes a transmittance distribution sheet having a structure surface on which a fine structure portion including a plurality of protrusions is formed, and a directivity compensation sheet that transmits light while diffusing it. According to this planar illumination device, the non-uniformity of the illuminance distribution of light emitted from the LED can be canceled by the transmittance distribution sheet, and further, the non-uniformity of the directivity distribution of light can be compensated by the directivity compensation sheet. As a result, the luminance unevenness of the surface illumination device can be suppressed to an appropriate level.

特開２００６−３４４４０９号公報JP 2006-344409 A 特開２０１２−１８８８０号公報JP 2012-18880 A

本発明の目的の一つは、簡易かつ低コストで発光強度分布の均一性を向上させることができる構造を有する発光装置、及びその製造方法を提供することにある。   One of the objects of the present invention is to provide a light emitting device having a structure capable of improving the uniformity of light emission intensity distribution at a simple and low cost, and a method for manufacturing the same.

本発明の一態様は、上記目的を達成するために、下記［１］〜［４］の発光装置の製造方法を提供する。   In order to achieve the above object, one embodiment of the present invention provides a method for manufacturing a light-emitting device according to any one of [1] to [4] below.

［１］基板上に設置された複数の発光素子を用意する工程と、前記複数の発光素子から発せられる光を拡散する拡散板の一方の面に、有色の物質を含む透明の材料からなる光強度分布調整層をドット印刷により形成する工程と、前記面が前記複数の発光素子に向くように前記拡散板を設置する工程と、を含み、前記光強度分布調整層は、前記面上における前記光の強度の分布に応じた前記面上の透過性又は拡散性の分布を有するように形成され、前記拡散板から出射される前記光の強度分布の均一性を向上させる、発光装置の製造方法。 [1] A step of preparing a plurality of light-emitting elements installed on a substrate, and light made of a transparent material including a colored substance on one surface of a diffusion plate that diffuses light emitted from the plurality of light-emitting elements A step of forming an intensity distribution adjustment layer by dot printing; and a step of installing the diffusion plate so that the surface faces the plurality of light emitting elements, and the light intensity distribution adjustment layer is formed on the surface. A method for manufacturing a light-emitting device, which is formed so as to have a transmission or diffusivity distribution on the surface according to a light intensity distribution, and improves the uniformity of the light intensity distribution emitted from the diffusion plate .

［２］前記光強度分布調整層は、前記有色の物質の濃度の分布により前記透過性の分布を形成する、前記［１］に記載の発光装置の製造方法。 [2] The method for manufacturing a light-emitting device according to [1], wherein the light intensity distribution adjustment layer forms the transmission distribution based on a concentration distribution of the colored substance.

［３］前記光強度分布調整層は、その厚さの分布により前記透過性の分布を形成する、前記［１］又は［２］に記載の発光装置の製造方法。 [3] The method for manufacturing a light-emitting device according to [1] or [2], wherein the light intensity distribution adjustment layer forms the transmission distribution based on a thickness distribution.

［４］前記光強度分布調整層は、前記面の単位面積あたりの面積占有率の分布により前記拡散性の分布を形成する、前記［１］〜［３］のいずれか１項に記載の発光装置の製造方法。 [4] The light emission according to any one of [1] to [3], wherein the light intensity distribution adjustment layer forms the diffusive distribution by a distribution of an area occupation rate per unit area of the surface. Device manufacturing method.

また、本発明の他の態様は、上記目的を達成するために、下記［５］〜［１０］の発光装置を提供する。   In order to achieve the above object, another aspect of the present invention provides the following [5] to [10].

［５］基板上に設置された複数の発光素子と、前記複数の発光素子から発せられる光を拡散する拡散板と、有色の物質を含む透明の材料からなり、前記拡散板の前記光が入射する側の面上に形成され、前記拡散板から出射される前記光の強度分布の均一性を向上させる光強度分布調整層と、を有し、前記光強度分布調整層は、前記拡散板と異なる材料から別体に構成され、前記面上における前記光の強度の分布に応じた前記面上の透過性又は拡散性の分布を有する、発光装置。 [5] A plurality of light-emitting elements installed on the substrate, a diffusion plate that diffuses light emitted from the plurality of light-emitting elements, and a transparent material that includes a colored substance, and the light from the diffusion plate is incident A light intensity distribution adjusting layer that is formed on the surface on the side to improve the uniformity of the intensity distribution of the light emitted from the diffusion plate, and the light intensity distribution adjusting layer includes the diffusion plate and A light-emitting device that is configured separately from different materials and has a transmissive or diffusive distribution on the surface in accordance with the light intensity distribution on the surface.

［６］前記光強度分布調整層は、前記有色の物質の濃度の分布により前記透過性の分布を形成する、前記［５］に記載の発光装置。 [6] The light-emitting device according to [5], wherein the light intensity distribution adjustment layer forms the transmission distribution based on a concentration distribution of the colored substance.

［７］前記光強度分布調整層は、その厚さの分布により前記透過性の分布を形成する、前記［５］又は［６］に記載の発光装置。 [7] The light-emitting device according to [5] or [6], wherein the light intensity distribution adjustment layer forms the transmission distribution based on a thickness distribution.

［８］前記光強度分布調整層は、前記面の単位面積あたりの面積占有率の分布により前記拡散性の分布を形成する、前記［５］〜［７］のいずれか１項に記載の発光装置。 [8] The light emission according to any one of [5] to [7], wherein the light intensity distribution adjustment layer forms the diffusive distribution by a distribution of an area occupation ratio per unit area of the surface. apparatus.

［９］前記光強度分布調整層は、ドット印刷により形成された層である、前記［５］〜［８］のいずれか１項に記載の発光装置。 [9] The light emitting device according to any one of [5] to [8], wherein the light intensity distribution adjustment layer is a layer formed by dot printing.

［１０］前記拡散板は、前記面上における前記光の強度の分布に応じた厚さの分布を有し、前記面が波状の凹凸を有する、前記［５］〜［９］のいずれか１項に記載の発光装置。 [10] The diffusion plate according to any one of [5] to [9], wherein the diffusion plate has a thickness distribution corresponding to the light intensity distribution on the surface, and the surface has wavy unevenness. The light emitting device according to item.

本発明によれば、簡易かつ低コストで発光強度分布の均一性を向上させることができる構造を有する発光装置、及びその製造方法を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the light-emitting device which has the structure which can improve the uniformity of light emission intensity distribution simply and at low cost, and its manufacturing method can be provided.

図１は、第１の実施の形態に係る発光装置の垂直断面図である。FIG. 1 is a vertical cross-sectional view of the light emitting device according to the first embodiment. 図２（ａ）は、透過性の分布が形成された光強度分布調整層を模式的に表した平面図である。図２（ｂ）は、拡散性の分布が形成された光強度分布調整層を模式的に表した平面図である。FIG. 2A is a plan view schematically showing a light intensity distribution adjusting layer in which a transmission distribution is formed. FIG. 2B is a plan view schematically showing a light intensity distribution adjusting layer in which a diffusive distribution is formed. 図３（ａ）〜（ｃ）は、第１の実施の形態に係る発光装置１の構造により発揮される効果を説明するための模式図である。FIGS. 3A to 3C are schematic diagrams for explaining the effects exhibited by the structure of the light emitting device 1 according to the first embodiment. 図４（ａ）〜（ｃ）は、第１の実施の形態に係る発光装置１の構造により発揮される効果を説明するための模式図である。4A to 4C are schematic diagrams for explaining the effects exhibited by the structure of the light-emitting device 1 according to the first embodiment. 図５は、第２の実施の形態に係る発光装置の垂直断面図である。FIG. 5 is a vertical cross-sectional view of the light emitting device according to the second embodiment.

〔第１の実施の形態〕
（発光装置の構成）
図１は、第１の実施の形態に係る発光装置１の垂直断面図である。図１は、発光装置１に含まれる一部の発光素子１１の周辺を模式的に示す。 [First Embodiment]
(Configuration of light emitting device)
FIG. 1 is a vertical cross-sectional view of a light emitting device 1 according to the first embodiment. FIG. 1 schematically shows the periphery of some light-emitting elements 11 included in the light-emitting device 1.

発光装置１は、基板１０上に設置された複数の発光素子１１と、複数の発光素子１１から発せられる光１２を拡散する拡散板１３と、拡散板１３から出射される光１２の強度分布の均一性を向上させる光強度分布調整層１４と、を有する。   The light-emitting device 1 includes a plurality of light-emitting elements 11 installed on a substrate 10, a diffusion plate 13 that diffuses light 12 emitted from the plurality of light-emitting elements 11, and an intensity distribution of the light 12 emitted from the diffusion plate 13. A light intensity distribution adjusting layer 14 for improving uniformity.

基板１０は、図示しない配線を有する基板であり、例えば、表面に配線パターンを有する配線基板や、リードフレームインサート基板である。   The board | substrate 10 is a board | substrate which has the wiring which is not shown in figure, for example, is a wiring board which has a wiring pattern on the surface, and a lead frame insert board | substrate.

発光素子１１は、ＬＥＤチップやレーザーダイオード等の発光素子である。発光素子１１は、基板１０の配線部に電気的に接続される。発光素子１１は、フェイスアップ型でもよく、フェイスダウン型でもよい。   The light emitting element 11 is a light emitting element such as an LED chip or a laser diode. The light emitting element 11 is electrically connected to the wiring part of the substrate 10. The light emitting element 11 may be a face-up type or a face-down type.

図１に示される光１２は、拡散板１３の下側の面１３ｓにおける強度が所定の大きさ、例えば最大値の８５％以上、となる範囲の光を図示したものである。ここで、拡散板１３の下側の面１３ｓの光１２の強度が最大となる領域は、例えば、各々の発光素子１１の直上の領域である。   The light 12 shown in FIG. 1 illustrates light in a range where the intensity on the lower surface 13s of the diffusion plate 13 is a predetermined magnitude, for example, 85% or more of the maximum value. Here, the region where the intensity of the light 12 on the lower surface 13 s of the diffusion plate 13 is maximum is, for example, a region immediately above each light emitting element 11.

発光装置１は、発光素子１１から発せられる光の波長を変換する蛍光体を含む蛍光体層を有してもよい。例えば、蛍光体粒子を含む透明樹脂で発光素子１１の表面を覆ってもよい。この場合、例えば、発光素子１１の発光色が青色であり、蛍光体層に含まれる蛍光体の蛍光色が黄色である場合は、発光装置１の発光色は白色になる。   The light emitting device 1 may have a phosphor layer including a phosphor that converts the wavelength of light emitted from the light emitting element 11. For example, the surface of the light emitting element 11 may be covered with a transparent resin containing phosphor particles. In this case, for example, when the emission color of the light emitting element 11 is blue and the fluorescent color of the phosphor included in the phosphor layer is yellow, the emission color of the light emitting device 1 is white.

拡散板１３は、アクリル樹脂やポリカーボネート樹脂等からなる板状の透明基材内に、この透明基材と異なる屈折率を有する透明物質を分散させたものであり、光１２を拡散させつつ透過させることにより、発光装置１の発光強度分布の均一性を向上させるものである。拡散板１３の面１３ｓには、拡散性を向上させるためのシボ加工が施されていてもよい。   The diffusing plate 13 is obtained by dispersing a transparent substance having a refractive index different from that of a transparent base material in a plate-like transparent base material made of acrylic resin, polycarbonate resin, or the like, and allows the light 12 to pass through while diffusing. This improves the uniformity of the light emission intensity distribution of the light emitting device 1. The surface 13s of the diffusing plate 13 may be subjected to embossing for improving diffusibility.

拡散板１３は、発光素子１１の上方に、光強度分布調整層１４が形成された面１３ｓが複数の発光素子１１に向くように設置される。具体的には、例えば、拡散板１３は、基板１０と対向するように、基板１０を収納する図示しない筐体に固定される。   The diffusing plate 13 is installed above the light emitting elements 11 so that the surface 13 s on which the light intensity distribution adjusting layer 14 is formed faces the plurality of light emitting elements 11. Specifically, for example, the diffusion plate 13 is fixed to a housing (not shown) that houses the substrate 10 so as to face the substrate 10.

光強度分布調整層１４は、有色の物質を含む透明の材料からなり、拡散板１３の光１２が入射する側の面１３ｓ上にドット印刷により形成される。例えば、染料を溶剤に溶かした染料インク、顔料を溶剤に分散させた顔料インク、有色のマイクロガラスビーズを含む塗料である。光強度分布調整層１４は、白色であることが好ましく、この場合、白色の物質を含む透明の材料からなる。このように、光強度分布調整層１４は、拡散板１３と異なる材料から別体に構成される。   The light intensity distribution adjusting layer 14 is made of a transparent material containing a colored substance, and is formed by dot printing on the surface 13 s of the diffusion plate 13 on the light incident side. For example, a dye ink in which a dye is dissolved in a solvent, a pigment ink in which a pigment is dispersed in a solvent, and a paint including colored microglass beads. The light intensity distribution adjusting layer 14 is preferably white, and in this case, is made of a transparent material containing a white substance. Thus, the light intensity distribution adjusting layer 14 is formed separately from a material different from that of the diffusion plate 13.

光強度分布調整層１４は、面１３ｓ上における光１２の強度の分布に応じた面１３ｓ上の透過性又は拡散性の分布を有する。   The light intensity distribution adjusting layer 14 has a transmissive or diffusive distribution on the surface 13s according to the intensity distribution of the light 12 on the surface 13s.

光強度分布調整層１４の面１３ｓ上の透過性の分布は、例えば、光強度分布調整層１４に含まれる染料等の有色の物質の濃度の分布や、光強度分布調整層１４の厚さの分布により形成される。   The transmittance distribution on the surface 13 s of the light intensity distribution adjustment layer 14 is, for example, the distribution of the concentration of a colored substance such as a dye contained in the light intensity distribution adjustment layer 14 or the thickness of the light intensity distribution adjustment layer 14. Formed by distribution.

光強度分布調整層１４の面１３ｓ上の拡散性の分布は、例えば、光強度分布調整層１４の面１３ｓ上の単位面積あたりの面積占有率の分布により形成される。   The diffusive distribution on the surface 13s of the light intensity distribution adjustment layer 14 is formed by, for example, the distribution of area occupancy per unit area on the surface 13s of the light intensity distribution adjustment layer 14.

図２（ａ）は、透過性の分布が形成された光強度分布調整層１４を模式的に表した平面図である。図２（ｂ）は、拡散性の分布が形成された光強度分布調整層１４を模式的に表した平面図である。図２（ａ）、（ｂ）は、光強度分布調整層１４の１つの発光素子１１に対応する領域を表している。   FIG. 2A is a plan view schematically showing the light intensity distribution adjusting layer 14 in which the transmission distribution is formed. FIG. 2B is a plan view schematically showing the light intensity distribution adjusting layer 14 in which a diffusive distribution is formed. 2A and 2B show a region corresponding to one light emitting element 11 of the light intensity distribution adjusting layer 14.

図２（ａ）に描かれた四角形の微小領域１５のハッチングの濃度は、光強度分布調整層１４の厚さ又は有色の物質の濃度を表し、ハッチングが濃いほど厚さ又は有色の物質の濃度が小さいことを示している。厚さ又は有色の物質の濃度が高いほど、光強度分布調整層１４の光の透過性が低くなる。   The hatching density of the rectangular microregion 15 depicted in FIG. 2A represents the thickness of the light intensity distribution adjusting layer 14 or the density of the colored substance. The thicker the hatching, the thicker the density or the density of the colored substance. Is small. The higher the thickness or the concentration of the colored substance, the lower the light transmittance of the light intensity distribution adjusting layer 14.

図２（ａ）の中心の微小領域１５が形成される領域は、光１２の強度が最も高い領域であり、例えば、発光素子１１の中心の直上に位置する領域である。そして、中心の微小領域１５が形成される領域からの距離が大きくなるに伴い、光１２の強度が小さくなる。   2A is a region where the intensity of the light 12 is the highest, for example, a region located immediately above the center of the light emitting element 11. And the intensity | strength of the light 12 becomes small as the distance from the area | region in which the center micro area | region 15 is formed becomes large.

中心の微小領域１５は、光強度分布調整層１４の中で最も厚さ又は有色の物質の濃度が高く、光の透過性が低い。そして、中心の微小領域１５からの距離が大きくなるに伴い、微小領域１５の厚さ又は有色の物質の濃度が小さくなり、光の透過性が高くなる。   The central minute region 15 has the highest thickness or concentration of a colored substance in the light intensity distribution adjusting layer 14 and low light transmittance. As the distance from the center minute region 15 increases, the thickness of the minute region 15 or the concentration of the colored substance decreases, and the light transmittance increases.

すなわち、面１３ｓ上の光１２の強度が大きい領域には透過性の低い微小領域１５が設けられ、光１２の強度が小さい領域には透過性の高い微小領域１５が設けられている。例えば、光強度分布調整層１４の厚さ又は有色の物質の濃度の分布を表す波形は、面１３ｓ上の光１２の強度分布を表す波形の強度を反転させたものと一致する。このため、光強度分布調整層１４は、拡散板１３を介して外部に出射される光１２の強度分布の均一性を向上させることができる。   In other words, a low-permeability microregion 15 is provided in the region where the intensity of the light 12 on the surface 13s is high, and a high-transmission microregion 15 is provided in the region where the intensity of the light 12 is low. For example, the waveform representing the thickness distribution of the light intensity distribution adjusting layer 14 or the concentration distribution of the colored substance coincides with the inverted waveform intensity representing the intensity distribution of the light 12 on the surface 13s. For this reason, the light intensity distribution adjustment layer 14 can improve the uniformity of the intensity distribution of the light 12 emitted to the outside through the diffusion plate 13.

ここで、例えば、ドット印刷により同じ領域に複数回重ねて印刷を行うことにより、光強度分布調整層１４の厚い部分を形成することができる。このため、印刷の重ねる回数を面１３ｓ上の領域ごとに制御することにより、厚さの分布により透過性の分布が形成された光強度分布調整層１４を形成することができる。   Here, for example, a thick portion of the light intensity distribution adjusting layer 14 can be formed by performing printing by overlapping a plurality of times in the same region by dot printing. For this reason, the light intensity distribution adjusting layer 14 in which the transmittance distribution is formed by the thickness distribution can be formed by controlling the number of times of printing for each region on the surface 13s.

また、有色の物質の濃度の分布により透過性の分布が形成された光強度分布調整層１４を形成する場合は、例えば、有色の物質の濃度の異なる複数種のインクを用意し、それらのインクをドット印刷により面１３ｓ上の領域ごとに塗り分けることにより、光強度分布調整層１４が得られる。   Further, when forming the light intensity distribution adjusting layer 14 in which the transmission distribution is formed by the distribution of the concentration of the colored substance, for example, a plurality of types of inks having different concentrations of the colored substance are prepared, and those inks are prepared. Is separately applied for each region on the surface 13s by dot printing, whereby the light intensity distribution adjusting layer 14 is obtained.

図２（ｂ）の中心の微小領域１５は、光強度分布調整層１４の中で最も単位面積１６あたりの面積占有率が高く、光の拡散性が高い（拡散されずに透過する光が少ない）。そして、中心の微小領域１５からの距離が大きくなるに伴い、微小領域１５の単位面積１６あたりの面積占有率が小さくなり、光の拡散性が低くなる（拡散されずに透過する光が多くなる）。   2B has the highest area occupancy per unit area 16 in the light intensity distribution adjustment layer 14 and has a high light diffusibility (less light is transmitted without being diffused). ). As the distance from the central microregion 15 increases, the area occupancy per unit area 16 of the microregion 15 decreases and the light diffusibility decreases (the amount of light transmitted without being diffused increases). ).

ここで、図２（ｂ）に示される単位面積１６の大きさは自由に設定することができる。例えば、単位面積１６を中心の微小領域１５の面積と等しい面積に設定する場合は、中心の微小領域１５の面積占有率が１００％であり、中心の微小領域１５からの距離が大きくなるに伴い、微小領域１５の面積占有率が０％に近づく。   Here, the size of the unit area 16 shown in FIG. 2B can be freely set. For example, when the unit area 16 is set to an area equal to the area of the center microregion 15, the area occupancy of the center microregion 15 is 100%, and the distance from the center microregion 15 increases. The area occupancy of the minute region 15 approaches 0%.

すなわち、面１３ｓ上の光１２の強度が大きい領域には拡散性の高い微小領域１５が設けられ、光１２の強度が小さい領域には拡散性の低い微小領域１５が設けられている。例えば、光強度分布調整層１４の単位面積１６あたりの面積占有率の分布を表す波形は、面１３ｓ上の光１２の強度分布を表す波形の強度を反転させたものと一致する。このため、光強度分布調整層１４は、拡散板１３を介して外部に出射される光１２の強度分布の均一性を向上させることができる。   That is, a minute region 15 having a high diffusibility is provided in a region where the intensity of the light 12 on the surface 13s is high, and a minute region 15 having a low diffusibility is provided in a region where the intensity of the light 12 is low. For example, the waveform representing the distribution of the area occupancy per unit area 16 of the light intensity distribution adjusting layer 14 matches that obtained by inverting the intensity of the waveform representing the intensity distribution of the light 12 on the surface 13s. For this reason, the light intensity distribution adjustment layer 14 can improve the uniformity of the intensity distribution of the light 12 emitted to the outside through the diffusion plate 13.

なお、図２（ａ）、（ｂ）には、光強度分布調整層１４の微小領域１５として正方格子状に並んだ四角形の領域が示されているが、微小領域１５の形状及び配列は、図２（ａ）、（ｂ）に示されるものに限定されない。例えば、千鳥格子状に配列した円形の領域や、中心から広がるように配列する環状の領域であってもよい。図２（ｂ）に示される単位面積１６の形状及び配置は、微小領域１５の形状及び配置に合わせて設定される。   In FIGS. 2A and 2B, a rectangular region arranged in a square lattice pattern is shown as the minute region 15 of the light intensity distribution adjusting layer 14, but the shape and arrangement of the minute region 15 are as follows. It is not limited to what is shown in Drawing 2 (a) and (b). For example, it may be a circular region arranged in a staggered pattern, or an annular region arranged so as to spread from the center. The shape and arrangement of the unit area 16 shown in FIG. 2B are set in accordance with the shape and arrangement of the micro area 15.

また、微小領域１５の面積も自由に設定することができる。各々の微小領域１５の面積が小さくなって微小領域１５の数が増し、厚さ、有色の物質の濃度、面積占有率の変化が細かくなれば、拡散板１３から出射される光１２の強度分布の均一性をより向上させることができる。   Further, the area of the minute region 15 can also be set freely. If the area of each microregion 15 is reduced and the number of microregions 15 is increased, and the change in thickness, concentration of colored substances, and area occupancy becomes fine, the intensity distribution of the light 12 emitted from the diffusion plate 13 The uniformity can be further improved.

また、光強度分布調整層１４は、厚さ、有色の物質の濃度、面積占有率のうちの２つ以上を分布させたものであってもよい。   Further, the light intensity distribution adjustment layer 14 may be a layer in which two or more of the thickness, the concentration of the colored substance, and the area occupancy are distributed.

図３（ａ）〜（ｃ）、図４（ａ）〜（ｃ）は、第１の実施の形態に係る発光装置１の構造により発揮される効果を説明するための模式図である。各図の発光装置の図の上側に描かれたグラフは、発光装置の拡散板１３から出射される光１２の水平方向の位置と強度の関係（強度分布）を模式的に表すものである。   FIGS. 3A to 3C and FIGS. 4A to 4C are schematic views for explaining the effects exhibited by the structure of the light emitting device 1 according to the first embodiment. The graph drawn on the upper side of each figure of the light emitting device schematically represents the relationship (intensity distribution) between the horizontal position and intensity of the light 12 emitted from the diffusion plate 13 of the light emitting device.

図３（ａ）は、比較例としての従来の典型的な構造を有する発光装置５の垂直断面図である。発光装置５は、基板１０上に設置された複数の発光素子１１と、複数の発光素子１１から発せられる光１２を拡散する拡散板１３と、を有する。   FIG. 3A is a vertical sectional view of a light emitting device 5 having a conventional typical structure as a comparative example. The light emitting device 5 includes a plurality of light emitting elements 11 installed on the substrate 10 and a diffusion plate 13 that diffuses light 12 emitted from the plurality of light emitting elements 11.

発光装置５においては、複数の発光素子１１が比較的近接して配置されるため、各々の発光素子１１から発せられる光１２の重なりが大きく、拡散板１３から出射される光１２の強度分布の均一性が高い。   In the light emitting device 5, since the plurality of light emitting elements 11 are arranged relatively close to each other, the overlap of the light 12 emitted from each light emitting element 11 is large, and the intensity distribution of the light 12 emitted from the diffusion plate 13 is large. High uniformity.

図３（ｂ）は、発光装置５を薄型化した発光装置６の垂直断面図である。発光装置６は、発光装置５と比較して、複数の発光素子１１の間隔は等しいが、基板１０と拡散板１３の間隔が狭い。このため、光１２の重なりが小さく、拡散板１３から出射される光１２の強度分布の均一性が低い。   FIG. 3B is a vertical sectional view of the light emitting device 6 in which the light emitting device 5 is thinned. Compared with the light emitting device 5, the light emitting device 6 has the same interval between the light emitting elements 11, but the interval between the substrate 10 and the diffusion plate 13 is narrow. For this reason, the overlap of the light 12 is small, and the uniformity of the intensity distribution of the light 12 emitted from the diffusion plate 13 is low.

発光装置６の発光強度分布の均一性を高くするためには、例えば、拡散板１３を厚くして拡散板１３の拡散性を向上させる方法をとることができるが、拡散板１３を厚くすることは発光装置６の薄型化の妨げになるだけでなく、重量が大きく増加するという問題を生む。また、複数の発光素子１１の間隔を狭めて光１２の重なりを大きくする場合は、用いられる発光素子１１の数が増えるため、製造コスト及び駆動電力が増加するという問題が生じる。   In order to increase the uniformity of the light emission intensity distribution of the light emitting device 6, for example, a method of increasing the diffusibility of the diffusion plate 13 by increasing the thickness of the diffusion plate 13 can be taken. Not only hinders the thinning of the light emitting device 6, but also causes a problem that the weight is greatly increased. Further, when the interval between the plurality of light emitting elements 11 is narrowed to increase the overlap of the light 12, the number of light emitting elements 11 to be used increases, which causes a problem that manufacturing cost and driving power increase.

図３（ｃ）は、第１の実施の形態に係る発光装置１の垂直断面図である。上述のように、発光装置１は光強度分布調整層１４により拡散板１３から出射される光１２の強度分布の均一性を向上させることができるため、薄型化により複数の発光素子１１の間隔及び基板１０と拡散板１３の間隔を発光装置６と等しくする場合であっても、拡散板１３から出射される光１２の強度分布の均一性の低下を抑えることができる。そして、光強度分布調整層１４は、ドット印刷という簡易かつ低コストの方法により形成することができる。   FIG. 3C is a vertical sectional view of the light emitting device 1 according to the first embodiment. As described above, since the light emitting device 1 can improve the uniformity of the intensity distribution of the light 12 emitted from the diffusion plate 13 by the light intensity distribution adjusting layer 14, the distance between the light emitting elements 11 and the light emitting device 11 can be reduced. Even when the distance between the substrate 10 and the diffusion plate 13 is made equal to that of the light emitting device 6, it is possible to suppress a decrease in the uniformity of the intensity distribution of the light 12 emitted from the diffusion plate 13. The light intensity distribution adjusting layer 14 can be formed by a simple and low-cost method called dot printing.

すなわち、発光装置１は、光強度分布調整層１４により、重量、製造コスト等の増加を抑えつつ、薄型化を図ることができる。例えば、発光装置５の複数の発光素子１１の間隔が１９ｍｍ、基板１０と拡散板１３の間隔が２９ｍｍである場合、発光装置１の基板１０と拡散板１３の間隔を１８．５ｍｍとしても、同等の発光強度分布が得られる。   That is, the light emitting device 1 can be thinned by the light intensity distribution adjusting layer 14 while suppressing an increase in weight, manufacturing cost, and the like. For example, when the distance between the plurality of light emitting elements 11 of the light emitting device 5 is 19 mm and the distance between the substrate 10 and the diffusion plate 13 is 29 mm, the distance between the substrate 10 and the diffusion plate 13 of the light emitting device 1 is equal to 18.5 mm. Is obtained.

図４（ａ）は、上述の発光装置５の垂直断面図である。図４（ｂ）は、発光装置５の発光素子１１の数を減らした発光装置７の垂直断面図である。   FIG. 4A is a vertical sectional view of the light emitting device 5 described above. FIG. 4B is a vertical sectional view of the light emitting device 7 in which the number of light emitting elements 11 of the light emitting device 5 is reduced.

発光装置７は、発光装置５と比較して、基板１０と拡散板１３の間隔は等しいが、複数の発光素子１１の間隔が広い。このため、光１２の重なりが小さく、拡散板１３から出射される光１２の強度分布の均一性が低い。   In the light emitting device 7, the distance between the substrate 10 and the diffusion plate 13 is equal to that of the light emitting device 5, but the distance between the plurality of light emitting elements 11 is wider. For this reason, the overlap of the light 12 is small, and the uniformity of the intensity distribution of the light 12 emitted from the diffusion plate 13 is low.

発光装置７の発光強度分布の均一性を高くするためには、例えば、拡散板１３を厚くして拡散板１３の拡散性を向上させることが求められるが、拡散板１３を厚くすることは、発光装置６の厚さ及び重量が増加するという問題を生む。   In order to increase the uniformity of the light emission intensity distribution of the light emitting device 7, for example, it is required to increase the diffusibility of the diffuser plate 13 by increasing the thickness of the diffuser plate 13. This causes a problem that the thickness and weight of the light emitting device 6 increase.

図４（ｃ）は、第１の実施の形態に係る発光装置１の垂直断面図である。上述のように、発光装置１は光強度分布調整層１４により拡散板１３から出射される光１２の強度分布の均一性を向上させることができるため、発光素子１１の数を減らすことにより複数の発光素子１１の間隔及び基板１０と拡散板１３の間隔を発光装置７と等しくする場合であっても、拡散板１３から出射される光１２の強度分布の均一性の低下を抑えることができる。   FIG. 4C is a vertical sectional view of the light emitting device 1 according to the first embodiment. As described above, since the light emitting device 1 can improve the uniformity of the intensity distribution of the light 12 emitted from the diffusion plate 13 by the light intensity distribution adjusting layer 14, a plurality of light emitting elements 11 can be reduced by reducing the number of light emitting elements 11. Even when the distance between the light emitting elements 11 and the distance between the substrate 10 and the diffusion plate 13 are made equal to those of the light emitting device 7, it is possible to suppress a decrease in the uniformity of the intensity distribution of the light 12 emitted from the diffusion plate 13.

すなわち、発光装置１は、光強度分布調整層１４により、厚さ、重量等の増加を抑えつつ、発光素子１１の数を減らして製造コスト及び駆動電力の低減を図ることができる。例えば、発光装置５の複数の発光素子１１の間隔が１９ｍｍ、基板１０と拡散板１３の間隔が２９ｍｍである場合、発光装置１の複数の発光素子１１の間隔を３８ｍｍとしても、同等の発光強度分布が得られる。   That is, the light-emitting device 1 can reduce the manufacturing cost and driving power by reducing the number of light-emitting elements 11 while suppressing an increase in thickness, weight, and the like by the light intensity distribution adjusting layer 14. For example, when the interval between the plurality of light emitting elements 11 of the light emitting device 5 is 19 mm and the interval between the substrate 10 and the diffusion plate 13 is 29 mm, even if the interval between the plurality of light emitting elements 11 of the light emitting device 1 is 38 mm, the same emission intensity is obtained. Distribution is obtained.

なお、発光素子１１の数の減少による発光装置１全体の発光強度の低下が問題となる場合は、拡散板１３の厚さを薄くして発光強度を増加させることができる。この場合であっても、光強度分布調整層１４が拡散板１３から出射される光１２の強度分布の均一性を十分に向上させることにより、発光装置１の発光強度分布の均一性の低下を抑えることができる。   In addition, when the fall of the light emission intensity of the whole light-emitting device 1 by the reduction | decrease of the number of the light emitting elements 11 becomes a problem, the thickness of the diffusion plate 13 can be made thin and light emission intensity can be increased. Even in this case, the light intensity distribution adjusting layer 14 sufficiently improves the uniformity of the intensity distribution of the light 12 emitted from the diffusion plate 13, thereby reducing the uniformity of the light emission intensity distribution of the light emitting device 1. Can be suppressed.

〔第２の実施の形態〕
第２の実施の形態は、発光装置の拡散板の形状において第１の実施の形態と異なる。なお、第１の実施の形態と同様の点については、説明を省略又は簡略化する。 [Second Embodiment]
The second embodiment differs from the first embodiment in the shape of the diffusion plate of the light emitting device. Note that the description of the same points as in the first embodiment will be omitted or simplified.

（発光装置の構成）
図５は、第２の実施の形態に係る発光装置２の垂直断面図である。図５は、発光装置２に含まれる一部の発光素子１１の周辺を模式的に示す。 (Configuration of light emitting device)
FIG. 5 is a vertical sectional view of the light emitting device 2 according to the second embodiment. FIG. 5 schematically shows the periphery of a part of the light emitting elements 11 included in the light emitting device 2.

発光装置２は、基板１０上に設置された複数の発光素子１１と、複数の発光素子１１から発せられる光１２を拡散する拡散板２３と、拡散板２３から出射される光１２の強度分布の均一性を向上させる光強度分布調整層１４と、を有する。   The light emitting device 2 includes a plurality of light emitting elements 11 installed on a substrate 10, a diffusion plate 23 that diffuses light 12 emitted from the plurality of light emitting elements 11, and an intensity distribution of the light 12 emitted from the diffusion plate 23. A light intensity distribution adjusting layer 14 for improving uniformity.

拡散板２３は、第１の実施の形態に係る発光装置１の拡散板１３と同様の材料からなり、光１２を拡散させつつ透過させることにより、発光装置２の発光強度分布の均一性を向上させるものである。   The diffusion plate 23 is made of the same material as the diffusion plate 13 of the light emitting device 1 according to the first embodiment, and improves the uniformity of the light emission intensity distribution of the light emitting device 2 by transmitting the light 12 while diffusing it. It is something to be made.

拡散板２３は、面２３ｓ上における光１２の強度の分布に応じた厚さの分布を有し、面２３ｓが波状の凹凸を有する。具体的には、面２３ｓ状の光１２の強度が高い部分は拡散性を高めるために厚く形成され、光１２の強度が低い部分は拡散性を下げるために薄く形成される。拡散板２３の面２３ｓには、拡散性を向上させるためのシボ加工が施されていてもよい。   The diffusion plate 23 has a thickness distribution corresponding to the intensity distribution of the light 12 on the surface 23s, and the surface 23s has wavy unevenness. Specifically, a portion where the intensity of the light 12 having the surface 23s is high is formed thick in order to improve the diffusibility, and a portion where the intensity of the light 12 is low is formed thin in order to reduce the diffusivity. The surface 23s of the diffusing plate 23 may be subjected to embossing for improving diffusibility.

光強度分布調整層１４は、有色の物質を含む透明の材料からなり、拡散板２３の光１２が入射する側の面２３ｓ上にドット印刷により形成される。   The light intensity distribution adjusting layer 14 is made of a transparent material containing a colored substance, and is formed by dot printing on the surface 23 s of the diffusion plate 23 on the light incident side.

光強度分布調整層１４は、第１の実施の形態と同様に、面２３ｓ上における光１２の強度の分布に応じた面２３ｓ上の透過性又は拡散性の分布を有する。   Similar to the first embodiment, the light intensity distribution adjusting layer 14 has a transmissive or diffusive distribution on the surface 23s according to the intensity distribution of the light 12 on the surface 23s.

本実施の形態の発光装置２においては、拡散板２３の厚さの分布及び光強度分布調整層１４の面２３ｓ上の透過性又は拡散性の分布により、拡散板２３から出射される光１２の強度分布の均一性を向上させることができる。   In the light emitting device 2 of the present embodiment, the light 12 emitted from the diffusion plate 23 is distributed by the thickness distribution of the diffusion plate 23 and the transmission or diffusivity distribution on the surface 23 s of the light intensity distribution adjusting layer 14. The uniformity of the intensity distribution can be improved.

（実施の形態の効果）
上記の第１及び第２の実施の形態によれば、光強度分布調整層を設けることにより、重量の増加等の副次的な問題の発生を抑えつつ、発光装置の薄型化やコスト低減を図ることができる。 (Effect of embodiment)
According to the first and second embodiments, by providing the light intensity distribution adjustment layer, it is possible to reduce the thickness and cost of the light emitting device while suppressing the occurrence of secondary problems such as an increase in weight. Can be planned.

また、光強度分布調整層は、通常の平板状の拡散板の上にドット印刷により形成することができる。このため、プリズムや複数の突起からなる微細構造が設けられた透明基材のように、製造に専用の金型を必要とせず、発光強度分布の均一性を向上させる構造を簡易かつ低コストで得ることができる。   The light intensity distribution adjusting layer can be formed by dot printing on a normal flat diffusion plate. For this reason, a structure that improves the uniformity of light emission intensity distribution is simple and low-cost without requiring a dedicated mold for manufacturing, such as a transparent substrate provided with a prism or a fine structure consisting of a plurality of protrusions. Can be obtained.

以上、本発明の実施の形態を説明したが、本発明は、上記の実施の形態に限定されず、発明の主旨を逸脱しない範囲内において種々変形実施が可能である。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.

また、上記の実施の形態は特許請求の範囲に係る発明を限定するものではない。また、実施の形態の中で説明した特徴の組合せの全てが発明の課題を解決するための手段に必須であるとは限らない点に留意すべきである。   Moreover, said embodiment does not limit the invention which concerns on a claim. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

１、２ 発光装置
１０ 基板
１１ 発光素子
１２ 光
１３、２３ 拡散板
１３ｓ、２３ｓ 面
１４ 光強度分布調整層
１５ 微小領域
１６ 単位面積 DESCRIPTION OF SYMBOLS 1, 2 Light-emitting device 10 Substrate 11 Light-emitting element 12 Light 13, 23 Diffusion plate 13s, 23s Surface 14 Light intensity distribution adjustment layer 15 Micro area 16 Unit area

Claims (10)

基板上に設置された複数の発光素子を用意する工程と、
前記複数の発光素子から発せられる光を拡散する拡散板の一方の面に、有色の物質を含む透明の材料からなる光強度分布調整層をドット印刷により形成する工程と、
前記面が前記複数の発光素子に向くように前記拡散板を設置する工程と、
を含み、
前記光強度分布調整層は、前記面上における前記光の強度の分布に応じた前記面上の透過性又は拡散性の分布を有するように形成され、前記拡散板から出射される前記光の強度分布の均一性を向上させる、発光装置の製造方法。 Preparing a plurality of light emitting elements installed on a substrate;
Forming a light intensity distribution adjusting layer made of a transparent material including a colored substance on one surface of a diffusion plate that diffuses light emitted from the plurality of light emitting elements by dot printing;
Installing the diffusing plate so that the surface faces the plurality of light emitting elements;
Including
The light intensity distribution adjusting layer is formed to have a transmission or diffusivity distribution on the surface according to the light intensity distribution on the surface, and the intensity of the light emitted from the diffusion plate. A method for manufacturing a light-emitting device, which improves the uniformity of distribution. 前記光強度分布調整層は、前記有色の物質の濃度の分布により前記透過性の分布を形成する、
請求項１に記載の発光装置の製造方法。 The light intensity distribution adjusting layer forms the transmission distribution by the concentration distribution of the colored substance.
The manufacturing method of the light-emitting device of Claim 1. 前記光強度分布調整層は、その厚さの分布により前記透過性の分布を形成する、
請求項１又は２に記載の発光装置の製造方法。 The light intensity distribution adjusting layer forms the transmission distribution by the thickness distribution,
The manufacturing method of the light-emitting device of Claim 1 or 2. 前記光強度分布調整層は、前記面の単位面積あたりの面積占有率の分布により前記拡散性の分布を形成する、
請求項１〜３のいずれか１項に記載の発光装置の製造方法。 The light intensity distribution adjusting layer forms the diffusive distribution by a distribution of area occupancy per unit area of the surface.
The manufacturing method of the light-emitting device of any one of Claims 1-3. 基板上に設置された複数の発光素子と、
前記複数の発光素子から発せられる光を拡散する拡散板と、
有色の物質を含む透明の材料からなり、前記拡散板の前記光が入射する側の面上に形成され、前記拡散板から出射される前記光の強度分布の均一性を向上させる光強度分布調整層と、
を有し、
前記光強度分布調整層は、前記拡散板と異なる材料から別体に構成され、前記面上における前記光の強度の分布に応じた前記面上の透過性又は拡散性の分布を有する、発光装置。 A plurality of light emitting elements installed on a substrate;
A diffusion plate for diffusing light emitted from the plurality of light emitting elements;
Light intensity distribution adjustment made of a transparent material containing a colored substance, formed on the surface on the light incident side of the diffusion plate, and improving the uniformity of the intensity distribution of the light emitted from the diffusion plate Layers,
Have
The light intensity distribution adjustment layer is formed separately from a material different from that of the diffusion plate, and has a transmissive or diffusive distribution on the surface in accordance with the light intensity distribution on the surface. . 前記光強度分布調整層は、前記有色の物質の濃度の分布により前記透過性の分布を形成する、
請求項５に記載の発光装置。 The light intensity distribution adjusting layer forms the transmission distribution by the concentration distribution of the colored substance.
The light emitting device according to claim 5. 前記光強度分布調整層は、その厚さの分布により前記透過性の分布を形成する、
請求項５又は６に記載の発光装置。 The light intensity distribution adjusting layer forms the transmission distribution by the thickness distribution,
The light emitting device according to claim 5. 前記光強度分布調整層は、前記面の単位面積あたりの面積占有率の分布により前記拡散性の分布を形成する、
請求項５〜７のいずれか１項に記載の発光装置。 The light intensity distribution adjusting layer forms the diffusive distribution by a distribution of area occupancy per unit area of the surface.
The light-emitting device of any one of Claims 5-7. 前記光強度分布調整層は、ドット印刷により形成された層である、
請求項５〜８のいずれか１項に記載の発光装置。 The light intensity distribution adjustment layer is a layer formed by dot printing.
The light emitting device according to any one of claims 5 to 8. 前記拡散板は、前記面上における前記光の強度の分布に応じた厚さの分布を有し、前記面が波状の凹凸を有する、
請求項５〜９のいずれか１項に記載の発光装置。 The diffusion plate has a thickness distribution according to the light intensity distribution on the surface, and the surface has wavy unevenness,
The light-emitting device of any one of Claims 5-9.
JP2014023866A 2014-02-10 2014-02-10 Method for manufacturing light emitting device Expired - Fee Related JP6187292B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014023866A JP6187292B2 (en) 2014-02-10 2014-02-10 Method for manufacturing light emitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014023866A JP6187292B2 (en) 2014-02-10 2014-02-10 Method for manufacturing light emitting device

Publications (2)

Publication Number Publication Date
JP2015153477A true JP2015153477A (en) 2015-08-24
JP6187292B2 JP6187292B2 (en) 2017-08-30

Family

ID=53895559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014023866A Expired - Fee Related JP6187292B2 (en) 2014-02-10 2014-02-10 Method for manufacturing light emitting device

Country Status (1)

Country Link
JP (1) JP6187292B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019511840A (en) * 2016-03-16 2019-04-25 ルミレッズ ホールディング ベーフェー Method of manufacturing LED module
CN112805617A (en) * 2018-08-21 2021-05-14 西铁城电子株式会社 Backlight device
US11914245B2 (en) 2020-02-18 2024-02-27 Fujifilm Corporation Light source unit, display device, and light source unit manufacturing apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0876123A (en) * 1994-09-02 1996-03-22 Casio Comput Co Ltd Illumination device
JP2006030910A (en) * 2004-07-21 2006-02-02 Sony Corp Back light device
JP2006173082A (en) * 2004-12-17 2006-06-29 Forward Electronics Co Ltd Backlight module having light diffusion plate
JP2006220778A (en) * 2005-02-09 2006-08-24 Sharp Corp Backlight device, and display device equipped therewith
JP2007149623A (en) * 2005-11-25 2007-06-14 Emphasis Materials Inc Device with light control function integrating diffusion, collimation, and color mixing monolithic
JP2008282744A (en) * 2007-05-11 2008-11-20 Sharp Corp Backlight device and display device equipped with above
JP2010040236A (en) * 2008-08-01 2010-02-18 Epson Imaging Devices Corp Lighting system, electro-optical device, and electronic device
JP2011053543A (en) * 2009-09-03 2011-03-17 Victor Co Of Japan Ltd Light quantity control member, surface light source unit, and display device
WO2012023459A1 (en) * 2010-08-20 2012-02-23 シャープ株式会社 Illuminating device, display device and television receiver

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0876123A (en) * 1994-09-02 1996-03-22 Casio Comput Co Ltd Illumination device
JP2006030910A (en) * 2004-07-21 2006-02-02 Sony Corp Back light device
JP2006173082A (en) * 2004-12-17 2006-06-29 Forward Electronics Co Ltd Backlight module having light diffusion plate
JP2006220778A (en) * 2005-02-09 2006-08-24 Sharp Corp Backlight device, and display device equipped therewith
JP2007149623A (en) * 2005-11-25 2007-06-14 Emphasis Materials Inc Device with light control function integrating diffusion, collimation, and color mixing monolithic
JP2008282744A (en) * 2007-05-11 2008-11-20 Sharp Corp Backlight device and display device equipped with above
JP2010040236A (en) * 2008-08-01 2010-02-18 Epson Imaging Devices Corp Lighting system, electro-optical device, and electronic device
JP2011053543A (en) * 2009-09-03 2011-03-17 Victor Co Of Japan Ltd Light quantity control member, surface light source unit, and display device
WO2012023459A1 (en) * 2010-08-20 2012-02-23 シャープ株式会社 Illuminating device, display device and television receiver

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019511840A (en) * 2016-03-16 2019-04-25 ルミレッズ ホールディング ベーフェー Method of manufacturing LED module
CN112805617A (en) * 2018-08-21 2021-05-14 西铁城电子株式会社 Backlight device
EP3842686A4 (en) * 2018-08-21 2022-05-18 Nichia Corporation Backlight device
EP4270103A3 (en) * 2018-08-21 2024-01-10 Nichia Corporation Backlight device
US11914245B2 (en) 2020-02-18 2024-02-27 Fujifilm Corporation Light source unit, display device, and light source unit manufacturing apparatus

Also Published As

Publication number Publication date
JP6187292B2 (en) 2017-08-30

Similar Documents

Publication Publication Date Title
US7663804B2 (en) Optical plate and backlight module using the same
JP6315179B2 (en) Surface light emitting device and liquid crystal display device
US7798693B2 (en) Optical plate and backlight module using the same
US7654719B2 (en) Optical plate and backlight module using the same
TWI697716B (en) Backlight module
CN106501888B (en) Optical film, and light-emitting device and display containing same
TW201210086A (en) Light distribution control device, light-emitting device using same, and method of producing light distribution control device
US10078170B2 (en) Light conversion member and display apparatus including the same
CN203519974U (en) Light-emitting assembly of backlight module and liquid crystal display device
CN106200118B (en) Quantum dot light source component, backlight module and liquid crystal display device
TW201636700A (en) Backlight module
JP2012064476A (en) Lighting device
JP6187292B2 (en) Method for manufacturing light emitting device
CN210573093U (en) Light modulation diaphragm, backlight module and display device
KR20200071651A (en) Back light unit and diplay including the same
JP2017049586A (en) Optical film and light-emitting device having the same
US20170175956A1 (en) Backlight modules
KR102236710B1 (en) Optical element and backlight unit including the same
KR102122536B1 (en) Direct Type Back Light Unit Having Hetero Material Lens For Liquid Crystal Display Device
KR102127967B1 (en) Backlight unit
CN112684636A (en) Backlight module and display device
TWI726849B (en) Optical film, light-emitting device having the optical film, and display having the light-emitting device
KR102185701B1 (en) Optical film for mini led or micro led backlight unit
TW201621426A (en) Backlight module
US20130272024A1 (en) Diffusion structure and lighting device with such diffusion structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160328

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170127

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170207

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20170329

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170704

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20170717

R150 Certificate of patent or registration of utility model

Ref document number: 6187292

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees