Liquid crystal display and light-emitting element

• US 20070058119A1
• Filed: 09/11/2006
• Published: 03/15/2007
• Est. Priority Date: 09/12/2005
• Status: Abandoned Application

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Tasaka, Tomoki
• Application Number:
  US11/518,319
• Publication Number:
  US 20070058119A1
• Time in Patent Office: Days
• US Class Current: 349/117
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/13362 providing polarized light, e.g. by converting a polarisation component into another one
• CPC Class Codes: G02F 1/13363 Birefringent elements, e.g. for optical compensation
• CPC Class Codes: G02F 1/133634 the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 2413/03 Number of plates being 3

Abstract

A liquid crystal display includes: a light emitting element utilized as a light source of a backlight, and emitting a linearly polarized light; a liquid crystal cell stacked on the light emitting element; a polarizer film stacked on the liquid crystal cell; and at least one retardation film stacked in at least one of a gap between the light emitting element and the liquid crystal cell and a gap between the liquid crystal cell and the polarizer film.

Claims

1. A liquid crystal display comprising:

a light emitting element utilized as a light source of a backlight, and emitting a linearly polarized light;

a liquid crystal cell stacked on the light emitting element;

a polarizer film stacked on the liquid crystal cell; and

at least one retardation film stacked in at least one of a gap between the light emitting element and the liquid crystal cell and a gap between the liquid crystal cell and the polarizer film.

2. The liquid crystal display according to claim 1, wherein

the light emitting element emits a linearly polarized light in a direction perpendicular to an axis of emission thereof, and

the polarizer film transmits a polarized light in a direction perpendicular to an optical axis thereof.

3. The liquid crystal display according to claim 1, wherein

the light emitting element emits a linearly polarized light in a direction parallel to an axis of emission thereof, and

the polarizer film transmits a polarized light in a direction parallel to an optical axis thereof.

5. The liquid crystal display according to claim 1, wherein the liquid crystal cell is a liquid crystal cell of an in-plane-switching type.

4. A liquid crystal display comprising:

a light emitting element utilized as a light source of a backlight, and emitting a linearly polarized light in a direction perpendicular to an axis of emission thereof;

a liquid crystal cell stacked on the linearly polarized light emitting element; and

a polarizer film stacked on the liquid crystal cell, and transmitting a polarized light in a direction parallel to an optical axis thereof.

6. A light-emitting element comprising:

a light emitting element emitting a linearly polarized light in a direction perpendicular to an axis of emission thereof; and

a retardation film applied to a light-emitting surface of the light emitting element.

7. A light-emitting element comprising:

a light emitting element emitting a linearly polarized light in a direction parallel to an axis of emission thereof; and

a retardation film applied to a light-emitting surface of the light emitting element.