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US 10,852,559 B2Granted
Light guide plate, backlight unit, and holographic display apparatus including the backlight unit
AssigneeSamsung Electronics Co., Ltd.
InventorsChilsung Choi, Hoon Song, Jungkwuen An, Sunil Kim, Sunghoon Lee, Hongseok Lee
Life of this patent
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Abstract
Provided are a light guide plate, a backlight unit, and a holographic display apparatus including the backlight unit. The backlight unit includes a light source and a light guide plate including two or more layers configured to guide light from the light source, wherein the two or more layers are configured to control a ratio of light transmitted therethrough to light reflected thereby.
Claims26
A backlight unit comprising:
- a light source:
- and
- a light guide plate comprising at least two layers configured to guide light from the light source, wherein each of the at least two layers is configured to control a ratio of light reflected thereby and light transmitted therethrough,
- wherein the at least two layers comprises a first layer, a second layer, and a third layer, wherein a refractive index of the second layer is different than at least one of a refractive index of the first layer and a refractive index of the third layer, and
- wherein a difference between the refractive index of the first layer and the refractive index of the second layer is at least about 0.2.
2 more elements
A light guide plate comprising:
- a first layer configured to guide light therein;
- a second layer;
- and
- a third layer configured to guide light therein,
- wherein the light guide plate is configured to control a ratio of light reflected thereby and light transmitted therethrough,
- wherein a difference between a refractive index of the first layer and a refractive index of the second layer is at least about 0.2.
3 more elements
A holographic display apparatus comprising:
- a light source;
- a light guide plate comprising at least two layers configured to guide light from the light source, wherein each of the at least two layers is configured to control a ratio of light reflected thereby and light transmitted therethrough;
- and
- a spatial light modulator configured to reproduce a holographic image by diffracting light from the light guide plate and incident on the spatial light modulator,
- wherein the at least two layers comprises a first layer having a first refractive index and a second layer having a second refractive index different from the first refractive index, and
- a difference between the first refractive index and the second refractive index is at least about 0.2.
3 more elements
Dependencies are inferred from the claim text.