The present application discloses a display device. Based on that a birefringence of a liquid crystal molecule is symmetrically compensated by using an optical compensation layer, the display device of the present provides a liquid crystal compensation layer on a first polarizer, and the liquid crystal compensation layer adjusts a compensation value through a refractive index difference and a thickness of the liquid crystal molecule. Therefore, the compensation value may match a high phase difference of the display device due to a large adjustment range and a little limitation, thereby improving a dark side-view leakage of the display device, improving a contrast of the display device, and improving an image quality.

Methods and systems for an electro-optic filter that operates in two modes-a homogeneous mode and a heterogeneous mode. The homogeneous mode maintains a relatively homogeneous shading/attenuation range across specified viewing angles in both the vertical and horizontal directions. The heterogeneous mode provides for relatively homogeneous shading/attenuation range across specified viewing angles in the horizontal direction but allows for gradual and a more varying (e.g., wider) range of shading/attenuation changes across the specified viewing angles in the vertical direction, e.g., as compared to the horizontal direction.

An optical element comprising a stacked liquid crystal (LC) structure for rotating polarization (e.g., handedness) of an incident circularly polarized light over a broad wavelength and incident angle for head-mounted displays (HMD)s display application is proposed. The stacked LC structure has a dual cell structures, which includes at least a first LC cell and a second LC cell, and the stacked LC structure rotates the polarized light for a broad band of light (e.g., visible spectrum) over a given field a view. The performance of designed dual LC cells structures may be optimized for narrow band wavelength and a narrow incident angle for different application cases.

A privacy display comprises a polarised output spatial light modulator, reflective polariser, switchable liquid crystal retarder and polariser. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss, whereas off-axis light has reduced luminance. Further, display reflectivity is reduced for on-axis reflections of ambient light, while reflectivity is increased for off-axis light. The visibility of the display to off-axis snoopers is reduced by means of luminance reduction and increased frontal reflectivity to ambient light. In a wide angle mode of operation, the liquid crystal retardance is adjusted so that off-axis luminance and reflectivity are unmodified.

A privacy display comprises a spatial light modulator and a passive retarder arranged between first and second polarisers arranged in series with the spatial light modulator. On-axis light from the spatial light modulator is directed without loss, and off-axis light has reduced luminance. The visibility of the display to off-axis snoopers is reduced by means of luminance reduction over a wide polar field of view. Off-axis visibility of the display in an automotive vehicle can be reduced.

A complex light modulator including a first polarization plate, a second polarization plate provided, an amplitude modulator provided between the first polarization plate and the second polarization plate, a phase modulator provided between the amplitude modulator and the second polarization plate, and color filters provided between the amplitude modulator and the phase modulator.

The present invention relates to a variable transmittance optical laminate and a manufacturing method therefor, a smart window comprising same, and a window and a door for a vehicle and a building, having same applied thereto.

A liquid crystal display panel (100A) includes a first polarizing plate (22) and a first phase difference plate (32a) disposed on an observer side, and a second polarizing plate (24) and a second phase difference plate (34a) disposed on a back surface side. nd of a liquid crystal layer having a homogeneous alignment when no electrical field is applied is 360 nm or greater and 490 nm or less, and an in-plane retardation R1 of the first phase difference plate is 100 nm or greater and 160 nm or less. A thickness direction retardation of at least one of the first and second phase difference plates has a negative value. The slow axes of the first and second phase difference plates are substantially parallel to each other and substantially orthogonal to an azimuthal direction of the liquid crystal director.

A display device includes: a display panel and an optical member positioned on the display panel. The optical member includes: a polarization layer positioned on the display panel; a first compensation layer positioned between the display panel and the polarization layer; a second compensation layer positioned between the display panel and the first compensation layer; a third compensation layer positioned between the display panel and the second compensation layer; and a fourth compensation layer positioned between the display panel and the third compensation layer. The first compensation layer is a positive C plate and a thickness direction phase delay value of the first compensation layer is about 65 nm to about 15 nm, and the second compensation layer is a positive A plate and an in-plane phase delay value of the second compensation layer is about 75 nm to about 125 nm.

A liquid crystal panel includes: a first polarizer and a second polarizer in opposite sides, a liquid crystal cell arranged between the first polarizer and the second polarizer, a first quarter waveplate, arranged between the first polarizer and the liquid crystal cell, and a second quarter waveplate arranged between the second polarizer and the liquid crystal cell. The direction of an absorption axis of the first polarizer and the direction of an absorption axis of the second polarizer are consistent. The direction of an optic axis of the first quarter waveplate and the direction of an optic axis of the second quarter waveplate are consistent. The liquid crystal panel where the polarizers are pasted still keeps on normal-black mode when no voltage is applied on the liquid crystal panel. The contrast ratio of the liquid crystal panel is effectively enhanced as well.