Back to results
US 2024/0407227 A1Published application
Back Plate Film
AssigneeLG Chem, Ltd.
InventorsJong Pil Roh, Dong Hwan Ryu, Jin Hoo Kim
Life of this patent
Estimating the term…
Abstract
The present application relates to a back plate film. The present application provides a back plate film for an under-display camera in which a front camera of a mobile phone can capture a subject without image distortion. The back plate film of the present application can be usefully used in, for example, an OLED panel.
Claims19
A back plate film comprising:
- a retardation base material layer;
- and
- a first pressure-sensitive adhesive layer formed on one side of the retardation base material layer, wherein
- an absolute value of an in-plane retardation (R0) value calculated by Equation 1 below of the retardation base material layer is 100 nm or less, and an absolute value of a thickness direction retardation (Rth) value calculated by Equation 2 below is 100 nm or less:
- R
-
- 0
- =
- (
- nx
- -
- ny
- )
- ×
- d
- [
- Equation
-
- 1
- ]
- Rth
- =
- [
- (
- nx
- +
- ny
- )
- /
- 2
- -
- nz
- ]
- ×
- d
- [
- Equation
-
- 2
- ]
- wherein, nx, ny, and nz are the refractive indices of the retardation base material layer in the x-axis direction, y-axis direction, and z-axis direction for light with a wavelength of 550 nm, respectively, and d is the thickness (nm) of the retardation base material layer.
38 more elements
Dependencies are inferred from the claim text.