A display device includes a directional illuminator providing a light beam, a display panel downstream of a directional illuminator, for receiving and spatially modulating the light beam, and a beam redirecting module downstream of the display panel, for variably redirecting the spatially modulated light beam. Steering the illuminating light by the beam redirecting module enables one to steer the exit pupil of the display device to match the user's eye location(s).

A display device includes a directional illuminator providing a light beam, a display panel downstream of a directional illuminator, for receiving and spatially modulating the light beam, and a beam redirecting module downstream of the display panel, for variably redirecting the spatially modulated light beam. Steering the illuminating light by the beam redirecting module enables one to steer the exit pupil of the display device to match the user's eye location(s).

An electronic device is disclosed herein that includes an infrared light source to emit infrared light, a rolling shutter sensor, and at least one processor. The at least one processor is to: cause the rolling shutter sensor to output a first signal corresponding to a first frame of image data during exposure to the infrared light, reset the rows of the rolling shutter sensor at a same time, cause the rolling shutter sensor to output a second signal corresponding to a second frame of image data without exposure to the infrared light from the infrared light source, determine a difference between the first signal and the second signal to generate an ambient infrared free frame, and recognize a face based on the ambient infrared free frame.

Various embodiments of the present invention relate to an electronic device including a liquid crystal, the electronic device including: a piece of glass; a display disposed under a first region of the piece of glass; a power supplying module; one or more electrode films; and one or more liquid crystal layers disposed between the one or more electrode films. The electronic device may also include: a light reflection member (e.g., cholesteric liquid crystal) disposed under a second region of the piece of glass; a processor operatively connected to the display, the power supplying module, and the light reflection member; and a memory operatively connected to the processor. The processor can check the content to be displayed through the display, and can use the power supplying module to supply power to the light reflection member on the basis of at least the checked content, so that the one or more liquid crystal layers reflects at least a portion of light incident from the outside of the electronic device. In addition, other embodiments are possible.

A non-mechanical liquid crystal tunable filter (LCTF) assembly capable of switching between a multi-conjugate filter mode and a conformal filter mode is described. The non-mechanical LCTF architecture can include a plurality of LCTF components that each comprises a first optical filter comprising a first optical axis, a second optical filter comprising a second optical axis, wherein the second optical axis is rotated 90° relative to the first optical axis, and a first twisted nematic cell positioned between the first optical filter and the second optical filter, the first twisted nematic cell configured to polarize received light by 90° when a voltage is not applied and not polarize the received light when the voltage is applied. The non-mechanical LCTF assembly is configured to switch between a conformal filter mode and a multi-conjugate filter mode based on whether the voltage is applied to each of the plurality of LCTF components.

An apparatus for a combined camera system is described herein. The apparatus includes an adjustable infrared (IR) pass filter. A passband of the adjustable infrared (IR) pass filter is electrically adjusted. The apparatus also includes a rolling shutter sensor. An adjustable filter is to implement a global shutter and a rolling shutter sensor global reset.

According to an aspect, a substrate for a display apparatus includes: a first substrate; and at least one translucent coloring layer that overlaps with the first substrate. The at least one translucent coloring layer overlaps with an entire surface of a display region in which an image is displayed. A color of the at least one translucent coloring layer is identical across the entire surface of the display region.

A touch screen panel may include a liquid crystal, a first transparent electrode and a second transparent electrode provided at both sides of the liquid crystal, and a controller configured to transfer image data to the first transparent electrode and the second transparent electrode in a first mode and sense a touch of a user on at least one of the first transparent electrode and the second transparent electrode in a second mode.

Tunable filter arrays include an array of liquid crystal (LC) tunable Fabry-Perot (FP) microcavities. The microcavities are defined by first and second reflectors and an LC layer situated between the reflectors. The tunable filter is secured to an image sensor array so that the LC tunable microcavities are coupled to respective photodetectors of the image sensor array. Patterned electrodes are situated about the LC layer to tune the microcavities.

A liquid-crystal based color switch for use with an image sensor having sub-diffraction-limited (SDL) pixels. The color switch may switch between a first mode where green light is passed (and blue and red light is blocked) and a second mode where blue and red light is passed (and green light is blocked). The color switch may include an achromatic switch (such as a liquid crystal switch) and retarder stack filter that are both sandwiched between a first and a second polarizer. The SDL pixels may be distributed so that green subpixels are never adjacent to other green subpixels in the same row or column, so that red subpixels are always adjacent to green subpixels in the same row or column, and so that blue subpixels are always adjacent to green subpixels in the same row or column.