The disclosure provides an electronic device including a viewing angle control structure. The viewing angle control structure includes a first substrate, a second substrate disposed opposite to the first substrate, an adjustable dielectric layer disposed between the first substrate and the second substrate, a first alignment layer disposed between the first substrate and the adjustable dielectric layer, and a second alignment layer disposed between the second substrate and the adjustable dielectric layer. One of the first alignment layer and the second alignment layer is in a horizontal alignment and the other of the first alignment layer and the second alignment layer is in a vertical alignment.

A privacy display comprises a spatial light modulator and a compensated switchable liquid crystal retarder arranged between first and second polarisers arranged in series with the spatial light modulator. 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. The visibility of the display to off-axis snoopers is reduced by means of luminance reduction over a wide polar field. In a wide angle mode of operation, the switchable liquid crystal retardance is adjusted so that off-axis luminance is substantially unmodified.

An electronic device is provided. The electronic device includes a privacy module. The privacy module includes a first polarizing element, a second polarizing element, and a light modulation element. The first polarizing element includes a first light absorbing material. The first polarizing element has a surface, and the surface has a normal direction. The second polarizing element includes a second light absorbing material. The second polarizing element at least partially overlaps the first polarizing element. The light modulation element is disposed between the first polarizing element and the second polarizing element. The first light absorbing material has a first long axis, and the second light absorbing material has a second long axis. The first long axis and second long axis are parallel to the normal direction.

An electronic device is provided. The electronic device includes a viewing angle switchable structure. The viewing angle switchable structure includes a first polarizer, a second polarizer, a first liquid crystal layer, a second liquid crystal layer, and a substrate. The first liquid crystal layer is disposed between the first polarizer and the second polarizer. The second liquid crystal layer is disposed between the second polarizer and the substrate. A polarized light is incident into the second liquid crystal layer. An absorption axis of the first polarizer and an absorption axis of the second polarizer have different angles. The angle of the absorption axis of the first polarizer is perpendicular to a polarization direction of the polarized light.

A privacy filter includes a plurality of micro louvers. Each micro louver of the plurality of micro louvers is a same size. Each micro louver of the plurality of micro louvers are laid flat on top of each other to form the privacy filter. The plurality of micro louvers includes a first micro louver and a set of micro louvers. The first micro louver is in a fixed position. The set of micro louvers has a first piezo element at a first end of each micro louver and a second piezo element at a second end of each micro louver. The first end is opposite the second end.

A display device includes a viewing angle control layer including a liquid crystal layer disposed on a second electrode of an organic light-emitting element and the control electrode disposed on the liquid crystal layer, the control electrode includes a plate electrode and a plurality of tip electrodes protruding from the plate electrode toward the second electrode, wherein the plurality of tip electrodes are arranged within a light-emitting area of the organic light-emitting element, and the liquid crystal layer includes positive c-plate liquid crystal molecules aligned vertically.

A liquid crystal display (LCD) device includes an LCD panel with a number (N) of pixel elements for displaying an image. A dimming panel includes N dimming elements. The dimming panel has a first mode to apply a uniform dimming to the N dimming elements to provide a privacy function for the LCD device. The dimming panel further has a second mode to a apply a per-element dimming to provide a local dimming function for the LCD device.

A method is provided for adjusting a viewing angle for a dark state of a display panel, and the method includes steps of: obtaining a first brightness change of a to-be-tested panel at a first viewing angle under a condition of a first voltage difference; obtaining a second brightness change of the to-be-tested panel at a second viewing angle under the condition of the first voltage difference; obtaining a ratio of the second brightness change to the first brightness change; and comparing the ratio of the second brightness change to the first brightness change with a first threshold to determine whether the first voltage difference is a selection voltage of the display panel.

Provided is a viewing angle control system and an image display device which are capable of controlling the viewing angle of a display screen in a longitudinal direction and improving the visibility in a specific lateral direction. The viewing angle control system includes a polarizer, and a light absorption anisotropic layer, in which the polarizer has an in-plane absorption axis in a film, an angle θ between a transmittance central axis of the light absorption anisotropic layer and a normal line of the film is in a range of 0.1° to 45°, and an angle φ between a direction in which the transmittance central axis of the light absorption anisotropic layer is orthographically projected onto the film surface and the absorption axis of the polarizer is 0° or greater and less than 85°, greater than 95° and less than 265°, or greater than 275° and 360° or less.

A privacy display comprises a polarised output spatial light modulator, reflective polariser, plural polar control retarders and a 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 public mode of operation, the liquid crystal retardance is adjusted so that off-axis luminance and reflectivity are unmodified.