Optical sheet, screen, and display device
AssigneeDai Nippon Printing Co., Ltd.
InventorsShogo KUBOTA, Makio KURASHIGE, Kaori NAKATSUGAWA
Life of this patent
Estimating the term…
Abstract
Provided is an optical sheet which includes a plurality of particles and can sustain a speckle reduction effect over long periods of time, and which is used in a screen that is capable of displaying an image by being irradiated with light, the optical sheet including a particle layer having an insulating liquid, a holding layer, and a plurality of particles held rotatably in the holding layer. The particles include a first portion and a second portion, and are held in the holding layer so that the insulating liquid is present around the particles. The kinetic viscosity at 25° C. of the insulating liquid is 5.5 mm2/s or less.
Claims18
An optical sheet used in a screen that is capable of displaying an image by being irradiated with light, the optical sheet comprising:
- a particle layer having an insulating liquid, a holding layer, and a plurality of particles held rotatably in the holding layer,
- wherein the particles include a first portion and a second portion, and are held in the holding layer so that the insulating liquid is present around the particles, and
- the kinetic viscosity at 25° C. of the insulating liquid is 5.5 mm2/s or less.
An optical sheet used in a screen that is capable of displaying an image by being irradiated with light, the optical sheet comprising:
- a particle layer having an insulating liquid, a holding layer, and a plurality of particles held rotatably in the holding layer,
- wherein the particles include a first polymer portion as a first portion and a second polymer portion as a second portion, the particles being held in the holding layer so that the insulating liquid is present around the particles, and
- the kinetic viscosity at 25° C. of the insulating liquid is 5.5 mm2/s or less.
An optical sheet used in a screen that is capable of displaying an image by being irradiated with light, the optical sheet comprising:
- a particle layer having an insulating liquid, a holding layer, and a plurality of particles held rotatably in the holding layer,
- wherein the particles include a first portion and a second portion, and are held in the holding layer so that the insulating liquid is present around the particles, and
- the kinetic viscosity of the insulating liquid at a use temperature of the optical sheet is 5.5 mm2/s or less.
An optical sheet used in a screen that is capable of displaying an image by being irradiated with light, the optical sheet comprising:
- a particle layer having an insulating liquid, a holding layer, and a plurality of particles held rotatably in the holding layer,
- wherein the particles include a first polymer portion as a first portion and a second polymer portion as a second portion, the particles being held in the holding layer so that the insulating liquid is present around the particles, and
- the kinetic viscosity of the insulating liquid at a use temperature of the optical sheet is 5.5 mm2/s or less.
Dependencies are inferred from the claim text.