LCD BACKLIGHT COMPONENT COATINGS FOR REDUCING LIGHT LOSSES AND IMPROVING IN-STACK LIGHT COLLIMATION
First Claim
1. A multilayer stack for reducing light losses in a liquid crystal display (LCD) backlight, the multilayer stack comprising:
- a reflector;
a light guide;
a course diffuser;
a brightness enhancing film;
a fine diffuser;
one or more refractive index matching layers deposited onto one surface of the reflector, and onto at least one surface of at least one of the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser; and
one or more pressure sensitive adhesives (PSA) deposited onto the one or more refractive index matching layers.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided are multilayer stacks for backlight units in LCD panels and methods for forming thereof. The stacks include refractive index matching layers and pressure sensitive adhesives to minimize light losses. More particularly, the stacks comprise a reflector, a light guide, a course diffuser, one or more brightness enhancing films, and a fine diffuser. A refractive index matching layer is deposited onto at least one surface of the backlight components. A pressure sensitive adhesive is deposited onto the refractive index matching layers. Alternatively, the stacks comprise two or more refractive index matching layers on each surface of the backlight components and retain an air gap between the backlight components. The refractive index matching interlayers are based on a polymer solution having about 0.1%-30% by weight of specific rigid rod-like polymer molecules. The molecules may include various cores, spacers, and sides groups to ensure their solubility, viscosity, and cross-linking ability.
18 Citations
32 Claims
-
1. A multilayer stack for reducing light losses in a liquid crystal display (LCD) backlight, the multilayer stack comprising:
-
a reflector; a light guide; a course diffuser; a brightness enhancing film; a fine diffuser; one or more refractive index matching layers deposited onto one surface of the reflector, and onto at least one surface of at least one of the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser; and one or more pressure sensitive adhesives (PSA) deposited onto the one or more refractive index matching layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A multilayer stack for reducing light losses in a liquid crystal display (LCD) backlight, the multilayer stack comprising:
-
a reflector; a light guide; a course diffuser; a brightness enhancing film; a fine diffuser; and two or more refractive index matching layers deposited onto one surface of the reflector, and onto each surface of at least one of the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser; wherein an air gap is present between each two adjacent elements, wherein the elements include the reflector, the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A method for forming a multilayer stack for reducing light losses in a liquid crystal display (LCD) backlight, an LCD rear polarizer stack, an LCD panel, and a front polarizer stack, the method comprising:
-
providing a reflector, a light guide, a course diffuser, a brightness enhancing film, and a fine diffuser; depositing a refractive index matching layer onto one surface of the reflector, and onto at least one surface of at least one of the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser; depositing a pressure sensitive adhesive (PSA) onto one or more refractive index matching layers; disposing the reflector, the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser disposed on one another. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
-
27. A method for forming a multilayer stack for reducing light losses in a liquid crystal display (LCD) backlight, an LCD rear polarizer stack, an LCD panel, and a front polarizer stack, the method comprising:
-
providing a reflector, a light guide, a course diffuser, a brightness enhancing film, and a fine diffuser; depositing two or more refractive index matching layer onto one surface of the reflector, and onto both surfaces of at least one of the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser; disposing the reflector, the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser so that an air gap is present between two adjacent elements, wherein the elements include the reflector, the light guide, the course diffuser, the brightness enhancing film, and the fine diffuser. - View Dependent Claims (28, 29, 30, 31, 32)
-
Specification