A switchable privacy display for an automotive vehicle comprises a spatial light modulator, a first switchable liquid crystal retarder and first passive retarder arranged between a first pair of polarisers and a second switchable liquid crystal retarder and second passive retarder arranged between a second pair of polarisers. A first switchable liquid crystal retarder comprises a two homeotropic alignment layers and a second switchable liquid crystal retarder comprises two homogeneous alignment layers. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss to the passenger, whereas off-axis light has reduced luminance to reduce the visibility of the display to off-axis driver leaning towards the display. In a shared mode of operation, the liquid crystal layers are controlled so that off-axis luminance and reflectivity are unmodified.

An optical device is provided. The optical device includes a first liquid crystal (“LC”) cell and a second LC cell stacked with the first LC cell. The first and second LC cells are configured to provide a phase retardation to a light transmitted therethrough. The optical device also includes at least one first compensation film disposed between the first LC cell and the second LC cell. The optical device also includes a second compensation film disposed at a first side of the first LC cell opposite to a second side of the first LC cell where the at least one first compensation film is disposed. The optical device also includes a third compensation film disposed at a first side of the second LC cell opposite to a second side of the second LC cell where the at least one first compensation film is disposed.

A switchable privacy display comprises a spatial light modulator (SLM), a first switchable liquid crystal (LC) retarder and first passive retarder between a first pair of polarisers and a second switchable LC retarder and second passive retarder between a second pair of polarisers. The first switchable LC retarder comprises two homeotropic alignment layers and the second switchable LC retarder comprises two homogeneous alignment layers. In privacy mode, on-axis light from the SLM is directed without loss, whereas off-axis light has reduced luminance to reduce visibility to off-axis snoopers. The display may achieve privacy operation in landscape and portrait orientations. Further, display reflectivity may be reduced for on-axis reflections of ambient light, while reflectivity may be increased for off-axis light to achieve increased visual security. In public mode, the LC retardance is adjusted so that off-axis luminance and reflectivity are unmodified. The display may switch between day-time and night-time operation.

A liquid crystal display panel is described. In an embodiment, the liquid crystal panel display includes: a first linear polarizer; a second linear polarizer; a first quarter-wave plate disposed between a first substrate and the first linear polarizer, an angle between a slow axis of the first quarter-wave plate and an absorption axis of the first linear polarizer being 45° or 135′; a second quarter-wave plate disposed between a liquid crystal layer and the first substrate, slow axes of the first quarter-wave plate and the second quarter-wave plate being perpendicular, and absorption axes of the first linear polarizer and the second linear polarizer being perpendicular; a first retardation film disposed between the first quarter-wave plate and the second quarter-wave plate; and a second retardation film disposed at a side of the first quarter-wave plate facing away from the first retardation film, or disposed between the second linear polarizer and the liquid crystal layer.

A liquid crystal display device of the present invention includes in the following order from a viewing surface side a first polarizer, a first positive A plate having an in-plane retardation of 120 nm or greater and 155 nm or smaller, a positive C plate having a thickness retardation of 80 nm or greater and 100 nm or smaller, a first substrate, a second positive A plate having an in-plane retardation of 120 nm or greater and 155 nm or smaller, a horizontally aligned liquid crystal layer, a second substrate, a viewing angle compensation layer, and a second polarizer. The device further includes between the first polarizer and the first positive A plate a positive C plate having a thickness retardation of 30 nm or greater and 80 nm or smaller.

The present application relates to a liquid crystal display comprising: an upper polarizer; a lower polarizer; and a liquid crystal panel provided between the upper polarizer and the lower polarizer, in which the upper polarizer and the lower polarizer are provided such that the absorption axes thereof are parallel to each other, a wavelength plate is comprised between the upper polarizer and the liquid crystal panel which rotates linear polarized light at 85 to 90 degrees, and the liquid crystal panel is a horizontally aligned liquid crystal mode.

This application relates to a liquid crystal display which comprises: an upper polarizer; a lower polarizer; and a liquid crystal panel provided between the upper polarizer and the lower polarizer, in which the upper polarizer and the lower polarizer are provided so that absorption axes of the upper and lower polarizers are parallel to each other, a first half wave plate, a positive C plate, and a second half wave plate are sequentially comprised between the upper polarizer and the liquid crystal panel, and the liquid crystal panel is a vertical alignment liquid crystal mode.

Provided is a liquid crystal display panel, including: first and second substrates; a liquid crystal layer between the first and second substrates; a first linear polarizer provided at a side of the first substrate facing away from the liquid crystal layer and having an absorption axis extending along a first direction; a second linear polarizer provided at a side of the second substrate facing away from the liquid crystal layer and having an absorption axis extending along a direction perpendicular to the first direction; a first quarter-wave plate provided at the side of the first substrate facing away from the liquid crystal layer; a second quarter-wave plate between the first substrate and the liquid crystal layer; and a first half-wave plate provided at the side of the first substrate facing away from the liquid crystal layer, and/or a second half-wave plate between the first substrate and the liquid crystal layer.

A liquid crystal display device of the present invention includes in the following order from a viewing surface side a first polarizer, a first positive A plate having an in-plane retardation of 120 nm or greater and 155 nm or smaller, a positive C plate having a thickness retardation of 80 nm or greater and 100 nm or smaller, a first substrate, a second positive A plate having an in-plane retardation of 120 nm or greater and 155 nm or smaller, a horizontally aligned liquid crystal layer, a second substrate, a viewing angle compensation layer, and a second polarizer. The device further includes between the first polarizer and the first positive A plate a positive C plate having a thickness retardation of 30 nm or greater and 80 nm or smaller.

A liquid crystal display panel is described. In an embodiment, the liquid crystal display panel includes: a first substrate; a second substrate; a liquid crystal layer; a first linear polarizer disposed at a side of the first substrate away from the liquid crystal layer; a first quarter-wave plate disposed between the first substrate and the first linear polarizer, where an angle between a slow axis of the first quarter-wave plate and an absorption axis of the first linear polarizer is 45 or 135; a first retardation film disposed between the liquid crystal layer and the first quarter-wave plate; a second quarter-wave plate disposed between the liquid crystal layer and the first substrate, where slow axes of the first and second quarter-wave plates are perpendicular; and a second linear polarizer disposed at a side of the second substrate away from the liquid crystal layer, where absorption axes of the first and second linear polarizers are perpendicular