LED LIGHT BULB

PROBLEM TO BE SOLVED: To provide an LED light bulb capable of presenting a filament image by achieving a sparkling feeling by strong light diffusion.SOLUTION: In an LED light bulb 1 which is configured by accommodating an LED 3, a substrate 4 mounting the LED 3, and a part of metal terminals 5, 6 in which one end is electrically connected to the substrate 4, in a sealed space in a bulb having constant wall thickness t in which one end of a cylindrical body part 2A is sealed by a hollow hemispherical planar dome part 2B, and by drawing the other end of the metal terminals 5, 6 out of the bulb 2 by penetrating the other sealed part of the bulb 2. When an inner diameter of the dome part 2B of the bulb 2 is defined as r, and the wall thickness is defined as t, a light emitting point position on an optical axis of the LED 3 is set to be (1.6r+t) from an apex of the dome part 2B.SELECTED DRAWING: Figure 1 【課題】強い光拡散性によるキラキラ感を実現してフィラメントイメージを演出することができるＬＥＤ電球を提供すること。【解決手段】円筒状の本体部２Ａの一端が中空半球面状のドーム部２Ｂによって封止された一定肉厚ｔのバルブ内の密閉空間に、ＬＥＤ３と、該ＬＥＤ３を実装した基板４と、該基板４に一端が電気的に接続された金属端子５，６の一部を収容するとともに、前記金属端子５，６の他端を前記バルブ２の他端封止部を貫通させてバルブ２外へ引き出して成るＬＥＤ電球１において、前記バルブ２のドーム部２Ｂの内径をｒ、肉厚をｔとしたとき、前記ＬＥＤ３の光軸上の発光点位置を前記ドーム部２Ｂの頂点から（１．６ｒ＋ｔ）に設定する。【選択図】図１