ディスプレイ用導光体

Japanese Patent JP7050947

B2

A light guide part (3c-2) guides, to a light output surface (3c-3), ambient light (11C) having entered a light entry surface (3c-1) from within a second angular range that is between: a first angular range in which the light-entry angle relative to a display surface (2a) is small; and a third angular range in which the light-entry angle relative to the display surface (2a) is large. The light guide part (3c-2) has, in a center area thereof, a center section (3c-6) made of a substance that has a refractive index different from that of the light guide part (3c-2). Portions of the center section (3c-6) that are located so as to be respectively closer to the light entry surface (3c-1) and the light output surface (3c-3), each have a V-shaped reflection surface (3c-5) for reflecting ambient light (11D), which has entered the light entry surface (3c-1) from within the first angular range, in a direction different from the direction toward the light output surface (3c-3) after the ambient light (11D) enters the light guide part (3c-2). In addition, a portion of the outer surface of the light guide part (3c-2) that is located so as to be closer to the light entry surface (3c-1), is a transmission surface (3c-4) which allows ambient light (11E) having entered the light entry surface (3c-1) from within the second angular range to pass through the light guide part (3c-2) so as to be transmitted to the outside of the light guide part (3c-2).

Yosuke Amitani

JP2020547819A

April 08, 2022

September 28, 2018

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Mitsubishi Electric Corporation

G02B6/42; G02B6/00

JP2007317665A
JP11284803A
JP2019003892A
JP2009223196A
JP2000307807A
JP2000194079A

WO2017216958A1
WO2015125645A1
US20090059553

Sanno domestic and foreign patent office

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