Facebook Technologies, LLC

Oculus, Vr, LLC

Meta Platforms Technologies, LLC

Jianru Shi

Evan Mark Richards

Mary Lou Jepsen

Shie Ping Jeffrey Tseng

Yue Shi

Fenglin Peng

Shizhe Shen

Lu Lu

Nirav Rajendra Patel

Jacques Gollier

Ying Geng

Yusufu Njoni Bamaxam Sulai

Cheonhong Kim

Dong Chen

Linghui Rao

Ghost image formation due to reflections of image light by a display panel to an ocular lens may be suppressed by ensuring that the image light reflected by the lens does not get reflected by the display panel back towards the lens. To that end, the display panel may include a quarter-wave birefringent layer between the top polarizer of the display panel and a layer inside the display panel that the image light reflects from, such as a black grid layer or an active matrix layer.

Display panel with backreflection suppression comprising first and second birefringent layers and a reflectivity layer

A liquid crystal display (LCD) device including an LCD panel and a backlight. The backlight includes a plurality of light sources to emit light, and a reflective stack. The reflective stack is positioned to receive light emitted from the light sources and transmit the light to the LCD panel. The reflective stack includes optical elements providing a folded beam path for the light emitted from the light sources to the LCD panel. The light emitted from the light sources is diffused while propagating towards and away from the LCD panel along the folded beam path. The folded beam path has an optical distance that is longer than the spatial distance between the light sources and the LCD panel to improve light diffusion by the backlight without substantially increasing backlight thickness.

Liquid crystal display backlight utilizing reflective stack

A liquid crystal display (LCD) device including a backlight with an LED assembly. The LED assembly includes a dichroic combiner and two or more different color LEDs. A substrate of the dichroic combiner receives color light from multiple color LEDs at different input regions and propagating in different directions. Dielectric layers within the substrate selectively reflect or transmit the color light to spatially superimpose the color light, and output the color light in a particular direction at a light output region of the substrate. The light output regions of LED assemblies are arranged behind an LCD panel, along one or more edges, to illuminate the LCD panel. The LED assembly provides edge-lighting without requiring LED placement along the one or more edges.

Dichroic combiner backlight used in a head mounted display

A lens includes immobilized liquid crystals. The liquid crystals in a first region are aligned in a first orientation. The liquid crystals in a second region, located between the first region and a third region and adjacent to the first region and the third region, are aligned in a second orientation that is distinct from the first orientation. The liquid crystals in the third region, located between the second region and a fourth region and adjacent to the second region and the fourth region, are aligned in the first orientation. The liquid crystals in the fourth region, located adjacent to the third region, are aligned in the second orientation. A device with the lens and an array of light emitting devices is also disclosed.

Liquid crystal half-wave plate lens

A head mounted display system includes a display device and an eyetracking device. The display device includes a liquid crystal (LC) panel comprising a plurality of rows of pixels, a back light unit (BLU), and a data driver. The BLU emits light during an illumination period of a frame period from an illumination start time and does not emit light for a remaining portion of the frame period. The eyetracking device determines an eye gaze area of a user in a pixel area of the display device. The illumination start time varies based on a location of the eye gaze area of the user. Liquid crystal material in a row of pixels of the LC panel outside the eye gaze area of the user transitions during the illumination period.

Backlight modulation for liquid crystal display with eyetracking for virtual reality

A display device includes a liquid crystal layer and a backlight. The liquid crystal layer includes a first liquid crystal portion including a first plurality of pixels, and a second liquid crystal portion including a second plurality of pixels. The backlight includes a first backlight unit corresponding to the first liquid crystal portion, and a second backlight unit corresponding to the second liquid crystal portion. Each backlight unit includes one or more light sources, and a light guide for guiding light generated by the one or more light sources to a respective liquid crystal portion.

Segmented backlight for liquid crystal display

A light intensity modulator array includes a first substrate with a two-dimensional array of electrodes; a second substrate with one or more electrodes; and liquid crystal located between the first substrate and the second substrate. The two-dimensional array of electrodes is arranged in a first direction and a second direction that is not parallel to the first direction. A respective electrode of the two-dimensional array of electrodes is distinct and separate from a first adjacent electrode and a second adjacent electrode of the two-dimensional array of electrodes. The first adjacent electrode is adjacent to the respective electrode in the first direction and the second adjacent electrode is adjacent to the respective electrode in the second direction. A method for tracking an eye using a device including the light intensity modulator array is also disclosed.

Enhanced spatial resolution using a segmented electrode array

A beam steering device includes a first substrate; a second substrate that is distinct from the first substrate; a first alignment layer located adjacent to the first substrate between the first substrate and the second substrate, and a second alignment layer located adjacent to the second substrate between the first substrate and the second substrate. The first alignment layer has a first periodic circular pattern, and the second alignment layer has a second periodic circular pattern that corresponds to the first periodic circular pattern. The beam steering device also includes nematic liquid crystals located between the first alignment layer and the second alignment layer; and one or more retardation compensators.

Wide angle beam steering for virtual reality and augmented reality

An electronic display comprises a backlight unit and a liquid crystal (LC) layer, wherein the backlight combines and directs light from a plurality of light sources towards the LC layer, which controls an amount of light to be displayed. The light sources comprise at least two different types of light sources associated with different wavelength ranges, to provide improved spectrum intensity for a wider range of wavelengths. The intensity of the light sources may be adjusted based upon the input data for an image to be displayed. For example, the light sources may be dimmed based upon a determined amount of the received image data associated with a particular gray level.

Liquid crystal display device with RGB backlight

Disclosed is a liquid crystal display device comprising a liquid crystal layer including a plurality of liquid crystals in a pixel area and a backlight unit coupled to the liquid crystal layer. A plurality of pixels are disposed in the pixel area. The backlight unit is configured to project light towards the entire pixel area of the liquid crystal layer during an illumination time period of a frame time, and not to project the light towards any of the pixel area of the liquid crystal layer during a non-illumination time period of the frame time. By enabling the backlight unit for the illumination time period less than the frame time, image streaking and latency can be reduced.

Global illumination mode liquid crystal display for virtual reality

A method includes sequentially transmitting, through a beam steering device, light of a first color and light of a second color that is distinct from the first color. The method also includes applying a first voltage to the beam steering device for transmission of the light of the first color through the beam steering device; and applying a second voltage to the beam steering device for transmission of the light of the second color through the beam steering device. A device configured to perform the method is also described.

Time-domain adjustment of phase retardation in a liquid crystal grating for a color display

An organic light emitting diode (OLED) display including an OLED panel having a series of gore shaped panel portions that form a quasi-spherical display surface. Each gore shaped panel portion includes a middle portion, a first end portion, and a second end portion. The middle portions of adjacent gore shaped panel portions are separated by bend regions. The OLED panel is bent along the first bend regions and each gore shaped panel portion is bent, such as along second bend regions between the middle portion and end portions, to join adjacent first end portions and adjacent second end portions of the gore shaped panel portions. Two OLED displays may be mounted within a head-mounted display (HMD), each behind an optics block. The quasi-spherical display surface of each OLED display generates a substantially flat image for the user after light from the display surface passes through the optic block.

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Union City, CA, United States of America

Jianru Shi