Provided are a backlight unit and a display device using the same. The backlight unit includes a main support, in which a sheet ear part of an optical sheet is disposed, having a sheet mounting part and an upper hole, a sheet mounting member for mounting the sheet ear part of the optical sheet and formed with a lower hole, and a sheet fixating mechanism coupled to the main support, the optical sheet, and the sheet mounting member to fix the sheet ear part of the optical sheet to the main support. A narrow bezel may be implemented, an optical sheet may be stably secured even in the narrow bezel, and light leakage may be prevented.

A dense wavelength-division multiplexing (DWDM) optical network includes an optical input port configured to receive unmodulated optical signals from the optical fiber comprising wavelength channels; one or more modulators coupled to the optical input port wherein the one or more modulators are each configured to modulate a respective first wavelength channel of the wavelength channels with respective data to produce a modulated first wavelength channel when the modulator is in a transmit state; wherein an input optical power of each modulator is kept at substantially a first level and an output optical power of the each modulator is kept at substantially a second level during operation of the modulator. A method and an optical network node are also disclosed therein.

A display device includes a light source module, a first light modulation module, a first polarizer layer, and a first color modulation layer. The light source module generates a first color light that is polarized to the first light modulation module, wherein the first light modulation module selectively modulates the polarization direction of the first color light. The first polarizer layer then receives the first color light and selectively blocks, partially blocks, or does not block the first color light from passing through. The first color modulation layer receives the first color light and generates a second color light.

Disclosed are an optical member and a display device. The display device includes a light guide plate; a light source on a lateral side of the light guide plate; and a wavelength conversion member between the light source and the light guide plate. The wavelength conversion member includes a receiving part between the light source and the light guide plate; a host in the receiving part; and a plurality of wavelength conversion particles in the host. The receiving part includes a convex part between the light source and the host; and a concave part between the light guide plate and the host.

A sight or aiming device is provided that can be attached to a firearm or other device with minimal visual and weight impacts and includes a light source, a pattern producing element, and an imageguide optical combiner. The user may have access to mechanical adjustments to “zero” the sight to the barrel of the instrument and to correct an aim point for windage and elevation. The orientation and construction of the sight facilitates use with a holster. The sight has an on-axis (or in-line) optical design, and thus the illumination of a reticle by the light source and its path entering the on-axis imageguide holographic combiner is approximately parallel to the boresight of the instrument that the sight is attached to.

A waveguide image combiner is used to transmit a monochrome or full-color image in an augmented reality display. The combiner uses multiple stacked substrates and multiple pairs of incoupling and outcouping VHOEs to expand a first FOV and an image expander to expand the second or perpendicular FOV. This suitably provides an expanded FOV that offers a diagonal FOV≥50°, a horizontal FOV≥40 and a vertical FOV≥25°. The combiner also delivers a large horizontal eye box up to 20 mm and a vertical eye box of 10 mm while maintaining high light efficiency of the real scene (e.g. >80%). The system is able to use a light engine based on broadband (10 nm≤Δλ≤40 nm) LEDs and maintain a large horizontal field of view and high transmission of the real imagery. The approach resolves issues with current embodiments including astigmatism, image overlap, color balance, and small light engine pupils leading to reduced eye boxes.

A display apparatus includes a display panel displaying an image using light; a light source generating first light; a light conversion member converting the first light into the light; a case member accommodating the light source and the light conversion member and including an open part to transmit the light which is converted by the light conversion member; and a light guide plate receiving the light through the open part and guiding the light to a upward direction where the display panel is disposed.

To provide a light guide member which has less components than conventional ones and has stable wavelength conversion efficiency; and a light source unit using the light guide member. A light guide member includes: a light guide plate; a receiving space formed in the light guide plate to face a light entrance plane; and a wavelength converting material placed in the receiving space. With the use of the light guide member, the number of components can be reduced and stable wavelength conversion efficiency can be achieved. Further, the production process can be facilitated and the production cost can be reduced.

The present invention discloses a novel nightlight with a simple structure. A non-opaque light output panel is disposed on a casing. A plurality of first lamp beads is directly welded onto a control circuit board. The light emitted by the first lamp beads is guided into a light output panel after refracting or reflecting by a light guide member, which facilitates transmission of light and allows uniform and soft light outputted from the light output panel. The nightlight has the advantages of convenient use, easy manufacture and assembly and low manufacturing cost.

A light conversion device includes a frame through which incident light is received from a light source and converted light is emitted from the light conversion device, the frame including: an opening through which light of a first color is received from the light source and from which light of a second color is emitted from the light conversion device, and a wall which surrounds the opening, a substrate in the opening and supported by the wall, a light conversion layer which is disposed on the substrate and receives the light of the first color from the light source, the light conversion layer including a light converting particle which converts the light of the first color to the light of the second color, a first inorganic layer disposed on the light conversion layer, and a first organic layer disposed on the first inorganic layer.