公开(公告)号：US20150022746A1

公开(公告)日：2015-01-22

申请号：US14511648

申请日：2014-10-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kouki ICHIHASHI ,  Motonobu YOSHIKAWA ,  Masahiro KASANO

IPC: G02B27/22 ,  F21V8/00

CPC classification number: G02B27/2214 ,  G02B6/0038 ,  G02B6/0051 ,  G02B6/0053 ,  G02B6/0068 ,  G02F1/133606 ,  G02F1/1347

Abstract: A backlight device and an image display apparatus which are capable of controlling the degree of diffusion of emitted light are provided. The backlight device according to the present disclosure includes: a light source; a light guide plate that causes surface emission of light emitted from the light source; a directivity control film that is provided on a light-emitting side of the light guide plate, and causes the light emitted from the light guide plate to have directivity; and a liquid crystal diffusion element that is switchable between a first state in which the light emitted from the directivity control film is transmitted as it is, and a second state in which the light emitted from the directivity control film is diffused.

Abstract translation: 提供了能够控制发射光的扩散程度的背光装置和图像显示装置。 根据本公开的背光装置包括：光源; 引导从所述光源发射的光的表面发射的导光板; 指向性控制膜，其设置在所述导光板的发光侧，使从所述导光板射出的光具有指向性; 以及液晶扩散元件，其可以在其中从指向性控制膜发射的光原样传播的第一状态和从指向性控制膜发射的光扩散的第二状态下切换。