ILLUMINATION DEVICE AND DISPLAY DEVICE

• Main Authors: YAGI SHUGO, MASUDA TAKASHI, KANBAYASHI YUICHI
• Format: Patent
• Language: English; Japanese
• Published: 15.12.2022
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To provide an illumination device that has suppressed uneven brightness while reducing the number of light sources.SOLUTION: An illumination device 20 includes: a plurality of LEDs 22 aligned in a row: a first light guide plate 30 having a first light incident face 30A, a light emission face 30B, and a first light diffusion part 35 having a diffusion function for refracting light in a direction intersecting with the direction that the LEDs 22 are aligned; and a second light guide plate 40 having a second light incident face 40A, a second light emission face 40B, and a second light diffusion part 45 having a diffusion function for refracting light in a direction along the alignment direction when viewed from a normal direction of the second light emission face 40B. The second light diffusion part 45 includes a plurality of first lenses having a ridge line extending in an intersecting direction that intersects with the alignment direction, and an inclined part forming an angle of 35° to 55° with respect to the normal direction.SELECTED DRAWING: Figure 1 【課題】光源の数を削減しつつ、輝度ムラの抑制を図った照明装置の提供。【解決手段】列をなして並ぶ複数のＬＥＤ２２；第１入光面３０Ａと、出光面３０Ｂと、ＬＥＤ２２の並び方向とは交差する方向に屈折させる拡散作用を備える第１光拡散部３５と、を有する第１導光板３０；および、第２入光面４０Ａと、第２出光面４０Ｂと、第２出光面４０Ｂの法線方向から視たときに並び方向に沿う方向に屈折させる拡散作用を備える第２光拡散部４５と、を有する第２導光板４０；を備え、第２光拡散部４５は、並び方向と交差する交差方向に延びる稜線を有し、法線方向に対して３５°以上５５°以下の角度をなす傾斜部を含む第１レンズを複数備えている照明装置２０とする。【選択図】図１