An electronic device including: a light guide plate; an imaging unit disposed so as to face the light guide plate and including an image sensor; a plurality of light emitting elements disposed around the imaging unit; and a refractive part interposed at least between the light emitting element and the light guide plate and refracting light emitted from the light emitting element.

A light-guide optical element (LOE) and methods of manufacture are disclosed. The LOE includes a transparent substrate having a first refractive index, the substrate having a pair of parallel external surfaces along a length thereof, and a plurality of mutually parallel at least partially reflective internal surfaces, the mutually parallel internal surfaces being angled obliquely relative to the pair of external surfaces; and a transparent polymer resin encapsulating at least a part of the substrate to form an encapsulated structure, the polymer resin having a second refractive index that is matched to the first refractive index; wherein the encapsulated structure comprises a pair of parallel external surfaces of optical quality formed from the resin.

To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.

A backlight unit for a display device includes: a light guide including a light incident surface; a substrate facing the light incident surface; a plurality of light sources on one surface of the substrate facing the light incident surface; and a first member disposed between the substrate and the light incident surface to space the light sources apart from the light guide. The first member includes: a support on one surface of the substrate that do not include the light source, the support having a first surface facing the light incident surface and a second surface facing the light sources; and a first layer disposed on the first surface and the second surface of the support to improve luminance uniformity across the light incident surface.

Provided is a surface light emitting illumination device including: a light guide panel on which a fine pattern is formed; a channel formed in a closed curve shape inside an edge of the light guide panel; an LED strip inserted in the channel, in which a plurality of LED chips are mounted on a flexible substrate at regular intervals; a fixing band inserted in the channel to fix the LED strip so that the LED strip is not separated from the channel; a channel communication part formed in the light guide panel to communicate with the channel.

A gaze tracking platform for human-machine interface device, such as a wearable Augmented Reality Near-to-Eye Display. The gaze tracking method, digital illumination assisted analog feedback tracking employs neither auxiliary camera nor digital image processing of human eye image that confronts challenges in gaze tracking speed, power, cost and space. Instead, an analog-digital hybrid method to track the gaze inspired by the groove tracking method that is widely adopted for optical data storage systems. In the method, a digital micromirror device generates angular modulated and infrared illuminating beam. The cornea reflects the infrared light and a segmented photodiode detects the reflection while providing a feedback servo signal to the digital micromirror device controller. The feedback signal is integrated over a time provides the variation gaze. Moreover, infrared and angularly modulated illumination is time-multiplexed with information displayed in visible wavelength. In this manner, single display device is dual used for information display and gaze tracking that benefits especially augmented reality devices in terms of achieving small device form factor.

Provided are an optical system and an aiming device. The optical system includes a wavefront modulation element with a first surface and a second surface disposed opposite to each other. The first surface of the wavefront modulation element is configured to receive a first light wave without a complete plane wavefront. The second surface of the wavefront modulation element is configured to emit a second light wave with a complete plane wavefront obtained due to the light beam shaping of the first light wave by the wavefront modulation element. The aiming device includes a housing and the optical system.

A light-emitting module includes (i) a board provided with: a circuit pattern and a plurality of bottomed holes in each of a set of wiring pads continuous with the circuit pattern on a first surface; electrically conductive paste extending over two or more of the bottomed holes; and an insulating resin covering the electrically conductive paste at a side close to the first surface, and (ii) a plurality of light-emitting segments connected to a second surface of the board with an adhesive sheet interposed therebetween. The light-emitting segments each include a plurality of light-emitting devices that are aligned. The electrically conductive paste includes a portion disposed on a portion of a surface of the wiring pad extending over two or more of the bottomed holes.

A waveguide illuminator includes an input waveguide, a waveguide splitter coupled to the input waveguide, and a waveguide array coupled to the waveguide splitter. The waveguide array includes an array of out-couplers out-coupling portions of the split light beam to form an array of out-coupled beam portions for illuminating a display panel. Locations of the array of out-couplers are coordinated with locations of individual pixels of the display panel, causing each light beam portion to propagate through a corresponding pixel of the display panel, thereby improving efficiency of light utilization by the display panel.

Provided is a surface light emitting illumination device including: a light guide panel on which a fine pattern is formed; a channel that includes a pair of first and second channels inside an edge of the light guide panel, and a third channel that connects the first and second channels; first and second LED strips inserted in the first and second channels, in which a plurality of LED chips are mounted on a flexible substrate; an electric wire inserted in the third channel to connect the first and second LED strips; first and second fixing bands inserted in the first and second channels to fix the first and second LED so that the first and second LED strips are not separated from the first and second channels; and a channel communication part formed in a side wall of the light guide panel to communicate with the first channel.