LIGHT GUIDE PLATE AND ILLUMINATION DEVICE

• Main Authors: KUSAKA YUSUKE, ARAKI YOSUKE, AGEMIZU WAHEI, KASANO SHINKO
• Format: Patent
• Language: English; Japanese
• Published: 06.05.2021
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To provide a light guide plate that suppresses the glare of a light-incident part, which is a state where the front face brightness of the light-incident part has a high brightness value and the light dazzles the user if it gets into the eyes) and is reduced in profile.SOLUTION: A light guide plate 2 has, on a surface 20a, a light-incident part 21 to receive outgoing light from a light source 1. The light-incident part 21 has a plurality of recesses 25 or a plurality of projections 26 to disperse the outgoing light from the light source 1 in a horizontal direction (a direction crossing the light source 1 optical axis).SELECTED DRAWING: Figure 3 【課題】入光部のグレア（入光部の正面輝度の輝度値が高く、目に入ると眩しい状態）を抑えるとともに、低背化した導光板を提供する。【解決手段】導光板２は、表面２０ａに、光源１から出射された出射光を受ける入光部２１を備える。入光部２１は、光源１からの出射光を水平方向（光源１の光軸と交差する方向）に分散させる、複数の凹部２５または複数の凸部２６を有する。【選択図】図３