Abstract: A liquid crystal display (LCD) device including a circular backlight that illuminates an LCD panel. The backlight is disposed behind the LCD panel and includes a light guide and an array of light emitting diodes (LEDs). The light guide includes a circular top surface, a circular bottom surface, and a connecting surface between the top and bottom surface. The array of LEDs are disposed along the connecting side surface of the light guide in a circular arrangement to emit light into in first directions toward a center of the light guide. The light guide receives the light from the array of LEDs in the first directions and directs the light in a second direction toward the LCD panel from the circular top surface. The backlight can include brightness enhancement films (BEFS), such as first BEF having concentric circular stripe prisms, and a second BEF having radial stripe prisms.

Abstract: An apparatus for treating pixels or regions of a display panel includes a measuring device configured to measure a parameter of light emitted by one or more pixels of each region of the display panel. The apparatus includes a parameter comparator operably coupled to the measuring device and configured to select one or more pixels or one or more regions of the display panel such that the measured parameter of light emitted by the one or more pixels or the one or more regions exceeds a threshold value. The apparatus also includes a laser device configured to emit a laser beam onto the selected one or more pixels or the selected one or more regions.

Abstract: 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.

Abstract: An organic light emitting diode (OLED) display including a conic OLED panel portion and a base OLED panel portion. The conic OLED panel portion includes peripheral display surfaces forming a truncated conic shape with an open base region around a center of the conic OLED panel portion. The OLED base portion includes a display surface. The base OLED panel portion is positioned to cover the open base region of the conic OLED panel portion such that the peripheral display surfaces surround the base display surface. The OLED display approximates a circular convex display. The conic OLED panel portion may be fabricated from a flat, flexible OLED panel portion that is bent along the fold regions defining bending axes between the peripheral display surfaces to form the truncated conic shape.

Abstract: A camera colorimeter system simultaneously lights up one or more pixel units on a display panel, each pixel unit including colored subpixels, for characterization of the display panel. The system includes optical elements that directs the light emitted by the simultaneously lit one or more pixel units to a filter and a corresponding imaging device. Each filter is configured to block wavelengths of light other than predetermined range of wavelengths, thereby ensuring that each imaging device captures a filtered spectrum of light that originates from subpixels of the same color. Using the filtered spectrum, the system reconstructs the full spectrum of light, which can subsequently be used to regenerate the display characteristics of each pixel unit (and corresponding colored subpixels). Thus, the camera colorimeter system can characterize a display panel in significantly less time as compared to conventional systems and methods.

Abstract: A corner cut liquid crystal display (LCD) device including a LCD panel and a backlight. The LCD panel includes adjacent panel portions of different width that collectively define a corner cut profile shape for the LCD panel. The backlight includes a light guide and light sources that emit light into the light guide. The backlight directs the light from the light sources toward the LCD panel. The light guide includes adjacent light guide portions of different width that define the corner cut profile shape. Each light guide portion illuminates a corresponding LCD panel portion. The LCD device can be incorporated into a head-mounted display (HMD). The corner cut profile shapes of two adjacent LCD devices, one for the left eye and one for the right eye, may define an open region for placement of other components or parts of the user, such as the user's nose when wearing the HMD.

Abstract: A liquid crystal display (LCD) device including a circular backlight that illuminates an LCD panel. The backlight is disposed behind the LCD panel and includes a light guide and an array of light emitting diodes (LEDs). The light guide includes a circular top surface, a circular bottom surface, and a connecting surface between the top and bottom surface. The array of LEDs are disposed along the connecting side surface of the light guide in a circular arrangement to emit light into in first directions toward a center of the light guide. The light guide receives the light from the array of LEDs in the first directions and directs the light in a second direction toward the LCD panel from the circular top surface. The backlight can include brightness enhancement films (BEFS), such as first BEF having concentric circular stripe prisms, and a second BEF having radial stripe prisms.

Abstract: An electronic display is driven to compensate for non-uniformity in a display property across display regions of the electronic display. Non-uniformity measures are determined for a set of electronic displays. A transformation is determined for converting the non-uniformity measures to transformed non-uniformity representations having fewer dimensions than a total number of the display regions in an electronic display. Using the transformation, a transformed non-uniformity representation for the electronic display is generated and stored, and an inverse transform is determined and stored. A system containing the electronic display generates correction values for the display regions by applying the inverse transformation to the transformed non-uniformity representation. Input display data for the electronic display is modified according to the generated correction values for the display regions. The electronic display is driven according the modified display data.

Abstract: Embodiments relate to determining characteristics of a display panel by using capturing images through multiple filters where the multiple filters include at least two filters that collectively enable replicating of a color matching function. At least two filters of the multiple filters have transmission profiles that correspond to the same color matching function (x color matching function) in different wavelength ranges. Image capturing devices capture the display panel through respective filters. The captured images are processed to the display characteristics of pixels or regions of the display panel.

Abstract: An apparatus for measuring characteristics of an electronic display panel includes an array of optical elements. Each optical element has a first surface and a second surface. The first surface faces the electronic display panel and receives light from pixels of the electronic display panel. The second surface faces away from the electronic display panel and has an area smaller than the area of the first surface. The second surface emits a combined version of the light received by the first surface. The apparatus further includes a light sensor facing the second surface to measure one or more parameters of the emitted light.

Abstract: An apparatus for testing digital cameras includes a light booth, a virtual image generation device, and a receptacle for a digital camera. The virtual image generation device is configured to generate a plurality of test images within the light booth by projecting light rays that converge at respective focal planes in the light booth. The receptacle is configured to enable detection of the test images by the digital camera.

Abstract: An eyecup assembly includes an electronic display element of a head-mounted display (HMD), a transparent plastic frame, an eyecup of the HMD, and a coupling interface. The plastic frame is laminated to the electronic display element and includes a center portion and a peripheral portion. The center portion includes an optical component and the peripheral portion including at least two protruding alignment structures. The eyecup includes alignment structures coupled to the at least two protruding alignment structures on the frame. The coupling interface interfaces with an alignment system. The alignment system is configured to align the eyecup assembly to the electronic display by adjusting a position of the electronic display relative to the eyecup so that a test image displayed by the electronic display after transmission through the optical component in the frame and an aperture of the eyecup is within a threshold value of a reference image.

Abstract: A lens configured for transmitting light in a first medium to a first reference pupil includes an optically transparent substrate having a plurality of Fresnel structures. A draft angle of a respective Fresnel structure is based on a distance of the respective Fresnel structure from a reference axis of the lens. The draft angle of the respective Fresnel structure is between a first angle and a second angle. The first angle corresponds to a direction of a ray, in the first medium, transmitted from a reference off-axis position through the respective Fresnel structure toward a second reference pupil located further away from the substrate than the first reference pupil. The second angle corresponds to a direction of the ray, in the optically transparent substrate, transmitted from the reference off-axis position through the respective Fresnel structure toward the second reference pupil.

Abstract: A lens includes an optically transparent substrate having a first lens surface and a second lens surface opposite to the first lens surface. The first lens surface includes a plurality of Fresnel structures. A respective Fresnel structure of the plurality of Fresnel structures includes a slope facet and a draft facet. The draft facet is characterized by a draft angle which is based on a distance of the respective Fresnel structure from a reference axis of the lens. The draft angle is between a first angle and a second angle, the first angle corresponding to a direction of a ray, in a first medium, transmitted from a reference off-axis position through the respective Fresnel structure toward a reference pupil. The second angle corresponding to a direction of the ray, in the optically transparent substrate, transmitted from the reference off-axis position through the respective Fresnel structure toward the reference pupil.

Abstract: Various of the disclosed embodiments use ITO and ITO-like materials or structures to serve as a waveguide for device communications, e.g., for mobile phone communication. Various embodiments employ an economical design, wherein one or more wireless antennas are integrated into or in conjunction with the display of a communications device as a waveguide antenna. The waveguide may use space more economically than traditional designs. In some embodiments, the waveguide can provide a wider range of viable operational frequencies. Additionally, in some embodiments, a square surface area of the waveguide optimizes the area to length ratio, which may reduce the resistance when the structure includes a lossy material. The waveguide antenna may be composed of ITO or ITO-like materials, which facilitate waveguide propagation while retaining a visually transparent character.

Abstract: A method for correcting non-uniformities of one or more display panels of a HMD (e.g., a VR headset or an AR headset) is disclosed, where the method is based on a luminance level of content being displayed. The method includes obtaining the calibration data for correcting non-uniformity of a display panel of the HMD at various brightness levels and storing the data. In response to receiving a request for providing content to be presented on the HMD, the host applies the calibration data based on a luminance level of content being rendered to correct for any non-uniformities of the one or more display panels while rendering the content for display.

Abstract: Some embodiments include a method of operating a calibration server for a camera module. The method can include: receiving, by the computing server, a first training image taken by the camera module in a mobile device and a corresponding image-context attribute from the mobile device; aggregating, by the computing device, the first training image into a set of contextually similar images based on the image-context attribute; computing a calibration parameter model based on the set of contextually similar images utilizing dimension reduction statistical analysis; and scheduling to update the calibration parameter model to configure an image processor to adjust a raw photograph of the camera module according to the calibration parameter model.

Abstract: An electronic display includes a substrate and a thin-film transistor (TFT) layer deposited on a top surface of the substrate. The TFT layer includes a plurality of driving TFTs that are configured to provide current to one or more organic light emitting diodes (OLEDs). The electronic display also includes an emission layer deposited on a top surface of the TFT layer. The emission layer includes emission areas and non-emission areas that separate the emission areas. The emission areas include a plurality of OLEDs and each of the OLEDs are configured to be driven by one or more of the TFTs to emit light. The electronic display also includes a reflective layer formed on a bottom surface of the substrate. The reflective layer is configured to reflect at least some of the light emitted from the OLEDs toward the non-emission areas.

Abstract: An apparatus includes a virtual image generation device, a receptacle for a digital camera, and a light booth. The virtual image generation device is configured to generate a plurality of test images within the light booth in accordance with a test sequence. The receptacle is configured to enable detection of the test images by the digital camera.

Abstract: Beacon devices transmit wireless beacon messages to alert an application on a mobile phone of the Beacon device's proximity. Contemplated beacon devices may also include an ultrasonic emitter and one or more microphones. The ultrasonic emitter may be used to complement other beacon operations, communicate information to a user mobile device, and monitor the beacon device's environment. Ultrasonic data may also be used to determine if a person or object is in proximity to the beacon device. Short echolocation travel times may be used to indicate that a user is “touching” the beacon device. Inter-beacon device communication may also be accomplished using the ultrasonic emitter.