IP Library › Granted Patent US 12687719
Granted Patent B2
US 12687719 · App. 18/196,123 · Granted Jul 21, 2026

Head-up display and display device

Inventors: Takayuki Kato (Tokyo, JP); Shinichiro Tanaka (Tokyo, JP)
Assignee: Magnolia White Corporation
G02B27/0101G02F1/133607
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Quick Facts
Patent No.
US 12687719
App. No.
18/196,123
Granted
Jul 21, 2026
Kind
B2
Abstract

According to an aspect, a head-up display includes: a light source; a liquid crystal panel that is configured to transmit light emitted from the light source and projects an image; and a prism sheet that is tilted with respect to a plate surface of the liquid crystal panel and configured to refract light transmitted through the liquid crystal panel.

Claims (24)

1 . A head-up display comprising:

a light source;

a liquid crystal panel that is configured to transmit light emitted from the light source and project an image;

a prism sheet that is tilted with respect to a plate surface of the liquid crystal panel and configured to refract light transmitted through the liquid crystal panel;

a sheet surface that is tilted with respect to the plate surface of the liquid crystal panel; and

a plurality of prisms that face the plate surface of the liquid crystal panel on an opposite side to the sheet surface,

wherein

each of the plurality of prisms is formed to have an angular cross section by a first prism surface and a second prism surface, and the plurality of prisms are arranged in a parallel manner,

the first prism surface is tilted with respect to the sheet surface,

the second prism surface is tilted with respect to the sheet surface, and

an angle made between the second prism surface and the sheet surface is larger than an angle made between the first prism surface and the sheet surface.

2 . The head-up display according to claim 1 , wherein an angle made between the sheet surface and the plate surface of the liquid crystal panel is larger than or equal to 10° and not larger than 15°.

3 . The head-up display according to claim 1 , wherein, in two adjacent prisms among the plurality of prisms, the first prism surface of one prism and the second prism surface of the other prism are formed continuously.

4 . A display device comprising:

a light source;

a liquid crystal panel that is configured to transmit light emitted from the light source and project an image;

a prism sheet that is tilted with respect to a plate surface of the liquid crystal panel and configured to refract light transmitted through the liquid crystal panel;

a sheet surface that is tilted with respect to the plate surface of the liquid crystal panel; and

a plurality of prisms that face the plate surface of the liquid crystal panel on an opposite side to the sheet surface,

wherein

each of the plurality of prisms is formed to have an angular cross section by a first prism surface and a second prism surface, and the plurality of prisms are arranged in a parallel manner,

the first prism surface is tilted with respect to the sheet surface,

the second prism surface is tilted with respect to the sheet surface, and

an angle made between the second prism surface and the sheet surface is larger than an angle made between the first prism surface and the sheet surface.