An improvement in contrast is achieved by suitably offsetting a phase difference produced by oblique light in a liquid-crystal panel.

An optical compensation apparatus includes a negative C-plate and two O-plates, an amount of a composite phase difference between the two O-plates and the negative C-plate in a tilt-direction cross section is substantially same as an amount of a phase difference produced by light having each of incident angles in a predetermined incident-angle range in the liquid-crystal panel, and a sign of the composite phase difference is opposite to a sign of the phase difference, the tilt-direction cross section being a cross section parallel to a tilt direction of the liquid crystal in a vertical-alignment-type liquid-crystal panel.

This application relates to a laminate comprising: a first half wave plate; a second half wave plate; and a positive C plate provided between the first half wave plate and the second half wave plate and a liquid crystal display comprising the same.

Techniques are described for operating an optical system. In some embodiments, light associated with a world object is received at the optical system. Virtual image light is projected onto an eyepiece of the optical system. A portion of a system field of view of the optical system to be at least partially dimmed is determined based on information detected by the optical system. A plurality of spatially-resolved dimming values for the portion of the system field of view may be determined based on the detected information. The detected information may include light information, gaze information, and/or image information. A dimmer of the optical system may be adjusted to reduce an intensity of light associated with the world object in the portion of the system field of view according to the plurality of dimming values.

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.

An optical waveplate is provided. The optical waveplate includes a positive-C film including a first liquid crystal (LC) layer. Tilt angles of LC molecules vary along a thickness direction of the first LC layer. The optical wave also includes an LC cell disposed at a first side of the positive-C film and including a second LC layer aligned in an optically compensated bend (OCB) mode. The optical waveplate also includes a positive-A film disposed at a second side of the positive-C film. The optical waveplate further includes a negative biaxial retardation film disposed between the positive-A film and the positive-C film. The LC cell is switchable between at least two predetermined states.

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

A display panel includes a second substrate. The second substrate includes a second base substrate and a shielding layer, an array structure layer, an insulating layer and a reflective layer which are sequentially disposed on a second base substrate, the array structure layer includes gate lines; the shielding layer includes a plurality of groups of light shielding units sequentially arranged along a first direction, each group of the light shielding units includes a plurality of independent sub-light shielding units sequentially arranged along a second direction, the reflective layer includes a plurality of reflective units arranged in an array, the plurality of reflective units form a plurality of reflective rows and a plurality of reflective columns, a first space area is formed between adjacent reflective columns, and a second space area is formed between adjacent reflective rows forms.

A liquid crystal display device includes sequentially from a viewing surface side: a first polarizer; an out-cell retardation layer; a first substrate; an in-cell retardation layer; a horizontally aligned liquid crystal layer; a second substrate; and a second polarizer. The liquid crystal display device includes a viewing angle compensation film between the first polarizer and the out-cell retardation layer or between the second substrate and the second polarizer. The out-cell retardation layer is a laminate including sequentially from a viewing surface side: a first retardation layer having an NZ coefficient of 1.0-1.1 and an Re of 120 nm or greater and smaller than 137.5 nm; and a second retardation layer having an Re of 0-10 nm and an Rth of 80-150 nm. The in-cell retardation layer is a third retardation layer having an NZ coefficient of 0.7-1.4 and an Re of 120 nm or greater and smaller than 137.5 nm.