JP4909450B2 - 発光装置、バックライトユニット、液晶表示装置及び照明装置 - Google Patents
発光装置、バックライトユニット、液晶表示装置及び照明装置 Download PDFInfo
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- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
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Description
まず、本発明の第1の実施形態に係る発光装置100について、図1A〜図1C及び図2を参照して説明する。図1Aは、本発明の第1の実施形態に係る発光装置の概観斜視図である。図1Bは、図1Aに示す本発明の第1の実施形態に係る発光装置の平面図である。図1Cは、図1Bに示すX−X’線に沿って切断した本発明の第1の実施形態に係る発光装置の断面図である。図2は、図1Cの破線で囲まれる領域Yの拡大図であって、本発明の第1の実施形態に係る発光装置の一部拡大断面図である。
図1Aに示すように、基板10は、その長手方向の長さ(長辺の長さ)L1とし、短手方向の長さ(短辺の長さ)をL2としたときに、10≦L1/L2であって、矩形状の細長い基板である。本実施形態で示す発光装置100は、例えば、基板10の長辺の長さは360mmであって、5mmの間隔で70個程度のLEDチップ21が基板10上に実装されている。ここで、例えば、L1は100mm以上とされ、L2は20mm以下とされる。
発光部20は、光の出射源であるLEDチップを備える発光領域であって、基板10の長手方向に沿って、一列の直線状(一次元的に)に複数設けられている。
導光部材30は、発光部20から出射される光を伝播させながら、近接する他の発光部20に導光させ、光を連結するための光バイパスとして機能するものである。本実施形態の導光部材30は、上に凸の略半球状のドーム形状であり、隣り合う発光部20の間の非発光部において、基板10の長手方向に沿って一列の直線状(一次元的に)に設けられている。
本発明において、発光装置100における非発光部とは、発光部20以外の非発光領域をいう。当該非発光部には、金属配線40等が設けられている。金属配線40は、基板10上に形成された絶縁膜11上において、複数のLEDチップ21を直列接続できるようにパターン形成された配線パターンである。金属配線40とLEDチップ21とはワイヤ60によって電気的に接続されており、これにより、複数のLEDチップ21が直列接続される。
LEDチップ21は、基板10上であって金属配線40の端部に実装されている。LEDチップ21は、本発明に係る半導体発光素子であって、本実施形態では、単色の可視光を発するベアチップである。LEDチップ21は、金属配線40上に形成されたダイアタッチ材70(ダイボンド材)によってダイボンディングされている。
図2に示すように、本実施形態におけるLEDチップ21のp側電極21a及びn側電極21bは、いずれもLEDチップ21の上側に形成されている。p側電極21a及びn側電極21bは、金属配線40とワイヤボンディングによってワイヤ60と電気的に接続されている。ワイヤ60は、例えば、金ワイヤを用いることができる。
次に、本発明の第2の実施形態に係る発光装置200について、図4A及び図4Bを用いて説明する。図4Aは、本発明の第2の実施形態に係る発光装置の平面図である。また、図4Bは、図4AのX−X’線に沿って切断した本発明の第2の実施形態に係る発光装置の断面図である。
次に、本発明の第3の実施形態に係る発光装置300、300Aについて、図5A及び図5Bを用いて説明する。図5Aは、本発明の第3の実施形態に係る発光装置の断面図である。また、図5Bは、本発明の第3の実施形態における他の例に係る発光装置の断面図である。
次に、本発明の第4の実施形態に係る発光装置800について、図5C及び図5Dを用いて説明する。図5Cは、本発明の第4の実施形態に係る発光装置の平面図である。また、図5Dは、本発明の第4の実施形態における発光装置を製造する際の模式断面図である。
(b) D1≦W2
複数のLEDチップ21を一括封止するための長尺状の蛍光体含有樹脂822は、ディスペンサ方式を採用することで容易に形成可能である。
以下、本発明の第1〜第4の実施形態に係る発光装置の適用例について、第5〜第7の実施形態に基づいて説明する。
次に、本発明の第1〜第4の実施形態に係る発光装置を、液晶表示装置に適用した例について、図7を用いて説明する。図7は、本発明の第6の実施形態に係る液晶表示装置の断面図である。
次に、本発明の第1〜第4の実施形態に係る発光装置を、照明装置に適用した例について、図8を用いて説明する。図8は、本発明の第7の実施形態に係る照明装置の断面図である。
次に、上述した本発明の実施形態に係る発光装置にいて、図9A及び図9Bを用いて説明する。図9Aは、本発明の変形例に係る照明装置の平面図である。また、図9Bは、図9AのY−Y’線に沿って切断した本発明の変形例に係る照明装置の断面図である。
11 絶縁膜
20、720、820 発光部
21、621、721 LEDチップ
21a p側電極
21b n側電極
22、722、822 蛍光体含有樹脂
30、230、330、330A、830 導光部材
40、740 金属配線
41 メッキ
60、760、921 ワイヤ
70 ダイアタッチ材
80 レジスト
100、200、300、300A、440、521、620、700、800 発光装置
400、520 バックライトユニット
410 筐体
411 開口
412 フランジ部
413 ネジ孔
420 反射シート
430 導光板
450 光学シート群
451 拡散シート
452 プリズムシート
453 偏光シート
460 前面枠
461 ネジ
470 ヒートシンク
500 液晶表示装置
510 液晶表示パネル
530 ハウジング
600 照明装置
610 ガラス管
630 口金ピン
640 口金
840 配線パターン
940 樹脂ペースト
Claims (19)
- 基板と、
前記基板に実装された複数の半導体発光素子及び光波長変換体を含み前記半導体発光素子のそれぞれを被覆する波長変換層を含む複数の発光部と、
前記基板上であって、隣り合う発光部の間に設けられた導光部材と、を備え、
前記導光部材は、前記波長変換層の一部を覆うように形成される
発光装置。 - 前記導光部材は、前記波長変換層と隣接している
請求項1に記載の発光装置。 - 少なくとも前記導光部材の前記半導体発光素子側の端部が、前記発光部の輪郭線又は当該輪郭線の延長線と前記基板との交点から延びる法線よりも前記半導体発光素子側に位置する
請求項1又は2に記載の発光装置。 - 前記導光部材は、隣り合う発光部を連結する
請求項1〜3のいずれか1項に記載の発光装置。 - 前記導光部材は、当該導光部材内を導光する光を拡散させる機能を有する
請求項1〜4のいずれか1項に記載の発光装置。 - 前記導光部材は、拡散材を含有する
請求項5に記載の発光装置。 - 前記導光部材における前記拡散材の密度は、前記半導体発光素子から遠ざかるに従って大きくなる
請求項6に記載の発光装置。 - 前記波長変換層の屈折率をn1とし、前記導光部材の屈折率をn2とすると、
n1≦n2である
請求項1〜6のいずれか1項に記載の発光装置。 - 前記導光部材は、透明樹脂である
請求項1〜8のいずれか1項に記載の発光装置。 - 前記波長変換層は、前記半導体発光素子の光を励起する蛍光体を含む蛍光体層である
請求項1〜9のいずれか1項に記載の発光装置。 - 前記波長変換層は、ドーム状である
請求項1〜10のいずれか1項に記載の発光装置。 - 前記基板は、長尺状であり、
前記複数の発光部及び前記導光部材は、前記基板の長手方向に沿って直線状に一列で配置されている
請求項4に記載の発光装置。 - 隣り合う前記導光部材の距離をD1とし、前記基板の長手方向の長さをL1とすると、
0≦D1/L1≦L1/2n
である
請求項12に記載の発光装置。 - 前記基板の短手方向の長さをL2としたときに、
10≦L1/L2
である
請求項1〜13のいずれか1項に記載の発光装置。 - 前記発光部の高さをh1とし、前記導光部材の高さをh2とすると、
0<h1/h2≦1
である
請求項1〜14のいずれか1項に記載の発光装置。 - 前記基板上に、前記導光部材の端部の位置を規制するための溝が形成される
請求項1〜15のいずれか1項に記載の発光装置。 - 請求項1〜16のいずれか1項に記載の発光装置を備える
バックライトユニット。 - 請求項17に記載のバックライトユニットと、
前記バックライトユニットから照射される光の光路上に配置された液晶パネルと、を備える
液晶表示装置。 - 請求項1〜15のいずれか1項に記載の発光装置を備える
照明装置。
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JP2011545124A JP4909450B2 (ja) | 2010-06-28 | 2011-06-24 | 発光装置、バックライトユニット、液晶表示装置及び照明装置 |
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JP2011545124A JP4909450B2 (ja) | 2010-06-28 | 2011-06-24 | 発光装置、バックライトユニット、液晶表示装置及び照明装置 |
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US (1) | US8450929B2 (ja) |
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