Provided are a switchable viewing angle display module and a vehicle. The display module comprises a viewing angle switching panel, a liquid crystal display panel, and a driver circuit. The viewing angle switching panel includes a first substrate and a second substrate, a dye liquid crystal layer, and a drive electrode layer. The drive electrode layer is disposed on a side of the first substrate and/or the second substrate facing the dye liquid crystal layer. The drive electrode layer includes a plurality of drive electrodes arranged sequentially along a first direction, and an interval of a preset length is set between two adjacent ones of the plurality of drive electrodes. The driver circuit is electrically connected to the plurality of drive electrodes, respectively and configured to provide sequentially increasing drive voltages to the plurality of drive electrodes arranged sequentially along the first direction.

An optical path control member according to an embodiment comprises: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and a light conversion part disposed between the first electrode and the second electrode, wherein: each of the first substrate and the second substrate includes a first direction, a second direction different from the first direction, and a third direction defined as a thickness-direction of the first substrate and the second substrate; the light conversion part includes a partition wall part and a reception part alternately arranged; and the reception part has a light transmittance changing according to application of a voltage, extends in a fourth direction, and has a lower surface inclined at an acute angle with respect to one side surface of the first substrate.

An optical path control member according to an embodiment comprises: a first substrate; a first electrode arranged on the first substrate; a second substrate arranged on the first substrate; a second electrode arranged under the second substrate; an optical conversion unit arranged between the first electrode and the second electrode; and an adhesive layer between the optical conversion unit and the second electrode, wherein the optical conversion unit comprises a partitioning part and an accommodation part that are alternately arranged, a dispersion liquid for changing the transmittance of light is arranged inside the accommodation part, the dispersion liquid is arranged to be in direct contact with the bottom surface and the inner side surfaces of the accommodation part and the lower surface of the adhesive layer, a first contact angle between the dispersion liquid and the bottom surface and the inner side surfaces of the accommodation part is 20° or lower, a second contact angle between the dispersion liquid and the lower surface of the adhesive layer is 20° or lower, and the difference between the first contact angle and the second contact angle is 1° to 5°.

A switchable privacy display comprises a spatial light modulator with output polariser, a reflective polariser, a polar control liquid crystal retarder and an additional polariser. The electrodes of the polar control liquid crystal retarder are patterned with a mark. In wide angle and narrow angle operational modes, the electrodes of the liquid crystal retarder are driven such that the mark is not visible. In a mark display state, the electrodes are driven to provide visibility of the mark in reflected light to an off-axis observer.

The invention relates to an electrically controllable viewing angle switch device and a display apparatus. The switch device includes a first substrate, a second substrate, a liquid crystal layer, spacers, a first alignment film, a second alignment film, a first polarizer, and a second polarizer and has a light transmission region. The second substrate is disposed opposite to the first substrate. The liquid crystal layer and the spacers are located between the first substrate and the second substrate in the light transmission region. The spacers are fixed on the first or second substrate. The first polarizer and the second polarizer are disposed on opposite sides of the liquid crystal layer. The axial directions of the transmission axis of the first polarizer and the transmission axis of the second polarizer are parallel or perpendicular to the alignment direction of the first alignment film and the second alignment film.

A multi-user multiview display, system, and method selectively provide either a multiview image when a group of users is within a predefined viewing zone or a two-dimensional (2D) image when the group of users is outside of the predefined viewing zone. The multi-user multiview display includes a broad-angle backlight configured to provide broad-angle emitted light and a multiview backlight configured to directional emitted light. The multi-user multiview display further includes an array of light valves configured to modulate the broad-angle emitted light to provide the 2D image and to modulate the directional emitted light to provide the multiview image within a predefined viewing zone. A head tracker may be employed to track users of the group of user to determine whether or not to provide the multiview image or the 2D image based on a location of the group of users.

The liquid crystal display device includes a liquid crystal panel, the liquid crystal panel including sub-pixels and including an active matrix substrate and a counter substrate, the active matrix substrate including a gate line, a first electrode, and a second electrode, the counter substrate including a third electrode, each of the sub-pixels being provided with an optical opening, the third electrode including a linear electrode extending along the gate line, a distance between the linear electrode and the optical opening being less than D/4 and a width of the linear electrode being D/4 or less, wherein a distance between two optical openings adjacent in the direction perpendicular to the extending direction of the gate line is defined as D.

An optical path control member according to an embodiment comprises: a first substrate; a first electrode disposed on the upper part of the first substrate; a second substrate disposed on the first substrate; a second electrode disposed on the lower part of the second substrate; and an optical conversion unit disposed between the first electrode and the second electrode. The optical conversion unit includes partition wall portions and receiving portions that are alternately disposed. The receiving portions change optical transmittance in response to the application of voltage, and include a dispersion and optical conversion particles dispersed in the dispersion. The refractive index ratio of the partition wall portions and the receiving portions is 1:0.95 to 1:1.05.

A switchable backlight for a switchable privacy display apparatus comprises a collimated waveguide and an optical turning film comprising first and second arrays of elongate prismatic elements. High image luminance and image visibility is provided for off-axis viewers in a public mode of operation while in a privacy mode of operation visual security level above a perceived privacy threshold may be achieved for off-axis snoopers.

A method for influencing light propagation directions of a light-emitting surface emitting light of a first wavelength range in a first direction and light of a second and wavelength range in a second direction. The wavelength ranges have a wavelength-dependent spectral radiance and differ in a peak wavelength. A switchable color converter is arranged in front of the light-emitting surface. The method includes the steps of a) deactivating the color converter for a first mode so that the second-wavelength range is transmitted and the first-wavelength range is absorbed, such that light from the light-emitting surface is only perceptible from the second direction, or b) activating the color converter for a second mode so that light of the first-wavelength range is converted into light of the second-wavelength range and light of the second-wavelength range is transmitted, such that light from the light-emitting surface is perceptible from both directions.