A head-mounted display including an image generator, a projection lens, and a waveguide is provided. The image generator is configured to provide an image beam. The projection lens is disposed on a path of the image beam. The projection lens has an image side and an object side. The image generator is configured at the image side. The projection lens includes a first lens element and a lens element group. The lens element group is disposed between the image generator and the first lens element. A first central axis of the first lens element and a second central axis of the lens element group are not overlapped. The waveguide is disposed on the path of the image beam and located at the object side of the projection lens.

Aspects of the present disclosure involve a transparent structure. The structure may include at least one light source, a transparent light-carrying guide layer optically coupled with the at least one light source. The structure may include refractive layers where a light absorbing feature is operably associated with the light-carrying guide layer to absorb any light not internally reflected in the light guide layer, at least adjacent the light source.

Disclosed is a backlight module. The backlight module includes a back plate, a light guide plate, and a clamp; the back plate includes a back plate body, and a plurality of side plates disposed along a periphery of the back plate body and connected to the back plate body, and a plane of each side plate is intersected with a plane of the back plate body. The light guide plate is disposed on a side, connected to the side plate, of the back plate body, and a gap is present between the light guide plate and each of the plurality of side plates. The clamp is disposed in the gap between the light guide plate and at least part of the plurality of side plates, and interference-fitted with the gap. The clamp is resilient, and the clamp and the side plate are positioned by a projection-recess fitting structure.

A color conversion film is provided. The film includes at least one narrow band emission phosphor dispersed within a binder matrix, wherein the narrow band emission phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U.sup.6+-containing phosphor, a green-emitting Mn.sup.2+-containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn.sup.4+, and a mixture thereof. A device is also provided.

A display panel and a display device are provided. The display panel includes a display component layer and a first anti-reflective film arranged on the display component layer. The display component layer includes a first polarizer, a first substrate arranged on the first polarizer, a second substrate arranged on the first substrate and a second polarizer arranged on the second substrate. The anti-reflective film on the second polarizer may reduce reflected light energy while increasing transmitted light energy.

A display device includes a light source, a spatial light modulator, and an optical assembly. The light source is configured to provide illumination light and the spatial light modulator is positioned to receive the illumination light. The optical assembly includes a first reflective surface with an aperture and a second reflective surface that is opposite to the first reflective surface. The optical assembly is positioned relative to the light source so that at least a first portion of the illumination light received by the optical assembly is reflected by the second reflective surface toward the first reflective surface, is reflected by the first reflective surface toward the second reflective surface, and is transmitted through the second reflective surface. A method performed by the display device is also disclosed.

A backlight module and an electronic device are provided. The backlight module, having a main region and a peripheral region near the main region, includes a light conversion layer, multiple light conversion patterns located in the peripheral region, and multiple light emitting units emitting a light beam. A first portion and a second portion of the light beam emitted respectively from the main region and the peripheral region both have at least one corresponding position in a CIE 1931 color space. One among the at least one corresponding position of the first portion of the light beam has corresponding coordinates (x1, y1). One among the at least one corresponding position of the second portion of the light beam has corresponding coordinates (x2, y2). The corresponding coordinates (x1, y1) and the corresponding coordinates (x2, y2) satisfy the following relation: 0≤|x1−x2|≤0.2.

A quantum dot composite material, and an optical film and a backlight module using the same are provided. The quantum dot composite material includes a curable polymer and a plurality of quantum dots dispersed in the curable polymer. Based on the total weight of the curable polymer being 100%, the curable polymer includes 15 wt % to 40 wt % of monofunctional group acrylic monomer, 15 wt % to 40 wt % of multifunctional group acrylic monomer, 5 wt % to 35 wt % of mercaptan functional group monomer, 1 wt % to 5 wt % of photoinitiator, 10 wt % to 30 wt % of acrylic oligomer, and 5 wt % to 25 wt % of scattering particles.

Systems and methods for IR readable transmissive and reflective displays are disclosed that do not suffer from a mirror-like appearance or undesirable dimming of the display due to sequential stacks of polarizers. The disclosed systems and methods use available IR LEDs in addition to, or in place of, visible light LEDs. An illuminator or integrator, which is a lightguide, is designed to maintain the polarization state of the light. The display can use a regular visible light, front polarizer and hence does not suffer from brightness reduction caused by an IR capable polarizer.

A display device includes a light source, a spatial light modulator, and an optical element. The optical element includes a reflective surface. The optical assembly is positioned relative to the light source so that at least a portion of the illumination light received by the optical element is reflected at the reflective surface back toward the light source. The spatial light modulator is positioned to receive at least a portion of the illumination light reflected by the reflective surface. A method performed by the display device is also disclosed.