Light emitting apparatus and method for manufacturing light deflecting liquid crystal cell
A technology of liquid crystal unit and light-emitting device, which is applied to the components of lighting devices, signal devices, optical components, etc., which can solve the problems of inability to bend incident light and achieve the effect of changing the direction of light emission
Inactive Publication Date: 2011-04-27
STANLEY ELECTRIC CO LTD
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Problems solved by technology
However, the technique disclosed in Patent Document 2 cannot bend all the incident light, and some light travels straight
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[0018] Because when the liquid crystal layer is arranged above the surface of the prism, the refractive index of the long axis of the liquid crystal molecule is higher than the refractive index of the prism material, the refractive index of the prism material and the refractive index of the short axis of the liquid crystal molecule are almost equal, and the long axis The refractive index is higher than that of the short axis, so an optical boundary is formed.
[0019] The shape of liquid crystal molecules is long and narrow, and light polarized in a certain direction (long axis direction of liquid crystal molecules) can be bent (deflected), but light polarized in another direction (short axis direction of liquid crystal molecules) passes through Not bent. As a result, the bent (deflected) light is in a linearly polarized state. Therefore, a layer of liquid crystal cells can only control half of the incident light.
[0020] In the technique disclosed in the specification of J...
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Abstract
A light emitting apparatus comprises a lamination of a first and a second light deflecting liquid crystal cells, a voltage applying device applying voltages to the light deflecting liquid crystal cells and an optical system irradiating incident light to the first light deflecting liquid crystal cell. Each cell comprises a prism layer having a prism extending in a predetermined direction, an alignment film formed on the prism layer and a liquid crystal layer having liquid crystal molecules. Long axis directions of the liquid crystal molecules are oriented in the predetermined direction on an interface between the alignment film and liquid crystal layer in the first cell and in a direction orthogonal to the predetermined direction in the second cell. The liquid crystal cells can change a course of light by deflecting both polarized light components of incident light.
Description
[0001] This application is based on Japanese Patent Application No. 2009-232308 filed on October 6, 2009, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to a light emitting device and a method for manufacturing a light deflecting liquid crystal cell, and more particularly, to a light emitting device deflecting an optical path by a liquid crystal cell and a method for manufacturing a liquid crystal cell used in the light emitting device. Background technique [0003] An incandescent lamp such as a halogen lamp or a high-intensity discharge (HID: high-intensity discharge) lamp such as a metal halide lamp is widely used as a light source of a vehicle headlight as a kind of vehicle lamp. Recently, in the technical field of vehicle headlights, it is considered to use light emitting diodes (LEDs) instead of incandescent lamps and HID lamps. The LED is a light and small light source, has a longer life and co...
Claims
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IPC IPC(8): F21S8/10F21V8/00F21V23/00F21V5/04F21V19/00G02F1/29
CPCG02F1/29F21S48/1731G02F1/13471F21S41/645G02B26/08G02F1/1337G02F1/1341
Inventor 都甲康夫
Owner STANLEY ELECTRIC CO LTD