A lens includes a cover part and a light-shielding part. The cover part includes a lens part, a connection part, and a flange part which are formed of a thermosetting first resin and continuous to one another. The light-shielding part covers an outer lateral side of the connection part and is formed of a second resin having a greater light-absorptance or a greater light-reflectance than the first resin.

This invention discloses a method of forming an uneven structure on a substrate. Use a hard tool to penetrate into a mold to cut a first trench and a second trench in an order on a surface of a mold, wherein the hard tool has a smoothly-curved shape such that the transverse width of each of the first trench and the second trench increases as the penetrating depth of the hard tool increases, wherein when each of the first trench and the second trench marches along a first direction, the penetrating depth of the hard tool is controlled by repeating moving the hard tool up and down to cut the mold such that the transverse width of each of the first trench and the second trench varies according to the controlled penetrating depth of the hard tool, wherein the first trench and the second trench completely overlap with each other with no space therebetween. Then, use the surface of the mold to emboss a thin film on a substrate.

The present disclosure provides a composition comprising a hierarchical opal that exhibits structural color when exposed to incident electromagnetic radiation. The hierarchical opal comprises nanoscale periodic cavities separated by a lattice constant, and includes a surface having grooves. The grooves may form a diffractive optical element on the surface of the hierarchical opal, such as a diffuser, a diffraction grating, a beamsplitter, a beam displacement opic, a Fresnel lens, and a micro lens, among others.

The present invention pertains to automotive surface panel illumination with the objective of attaining the whitest diffusive appearance with maximized light intensity transmission features. An automotive luminous panel system includes a luminous unit arrangement as defined by an anti-mist diffusive coating applied to a light transmissive substrate with a corresponding masked cover lens patterned with bleed-gaps that are configured to convey incident light directly through the patterned optical arrangement and operate between the hidden until lit modes of the luminous unit.

An optical film having a first surface, an opposing second surface, and a thickness normal to the first and second surfaces is cut. Cutting the film forms a channel at least partially through the thickness of the film. A light control material is printed proximate to a surface of the film. The ink traverses through the channel by capillary motion.

A multilayer light diffuser plate and a method for manufacturing the same are disclosed. The multilayer light diffusion plate comprises a main layer and a partially-transmissive and partially-reflective layer located under the main layer. The top surface of the main layer is the light-emitting surface, and the light-incident surface is the bottom surface of the partially-transmissive and partially-reflective layer. The partially-transmissive and partially-reflective layer comprises a plurality of first base material layers and a plurality of second base material layers stacked alternately. The materials of the first and second base material layers have different refractive indices. The partially-transmissive and partially-reflective layer formed by alternately stacking the first and second base material layers with different refractive indices is arranged on the light-incident surface of the light diffuser plate by means of extrusion, which is simpler and less expensive to manufacture.

It is an object of the present invention to provide a light diffusing lens production apparatus which makes it possible to efficiently produce a high-quality light diffusing lens having enhanced optical properties. The light diffusing lens production apparatus includes: a pair of molds 15, consisting of a fixed mold 16 and a movable mold 18, which forms a final molded product cavity 22 that defines the shape of a light diffusing lens 14; a mold clamping apparatus 62 in which the pair of molds 15 is attached; a transport device 66, having a chuck means capable of entering and exiting the space between the pair of molds 15 in an open state, which inserts a semifinished molded product 12 for the light diffusing lens 14 into the final molded product cavity 22; a heating device 68, having a heating means capable of entering and exiting the space between the pair of molds 15 in an open state, which heats the fixed mold 16-facing surface of the inserted semifinished molded product until the surface becomes a molten state; and an injection apparatus 64 which, after clamping of the pair of molds 15, injects a molding material into the final molded product cavity 22 so that the molding material covers the molten surface of the semifinished molded product 12.

A diffusion element and manufacturing method thereof, a backlight module and a display device are provided. The diffusion element including a non-woven fabric diffusion sheet, wherein the non-woven fabric diffusion sheet includes a substrate of non-woven fabric and a diffusion particle layer attached to at least one surface of the substrate. The diffusion element has the advantages of low cost, high yield and simple processes.

A method for injection moulding an optical component (20), e.g. a cover for a luminaire, with an incorporated optical function, the component (20) comprising an injection moulded body (18) and at least one optically functional relief structure (4) applied thereto, the relief structure (4) forming or contributing to the optical function of the component (20) to be moulded, wherein the method comprises: (i) providing an insert (2) comprising the said optical structure (4) in the form of an open-face relief structure (4) provided on a face, surface or portion of the insert (2), (ii) mounting the insert (2) inside a mould cavity (11) in which the component (20) is to be moulded, with the open-face relief structure (4) facing and at least partially abutting a surface portion of the mould cavity (11), and (iii) rear-injection moulding a body (18) of the component (20) within the mould cavity (11) so as to incorporate the insert (2) in the component body (18), wherein the said method is carried out with parameters selected and/or controlled such that during the injection moulding step (iii) the temperature at or on the face, surface or portion of the insert (2) provided with the relief structure (4) remains below the lowest of the glass transition temperature, melting temperature and temperature of onset of thermal decomposition of the material of that face, surface or portion of the insert (2).

A diffusion plate is provided. The diffusion plate includes a diffusion plate substrate, wherein the diffusion plate substrate includes grooves configured to accommodate microstructures of a light guide plate. The groove has a width larger than that of the microstructure, and the groove has a depth larger than a height of the microstructure. A method of manufacturing the diffusion plate and a backlight module are also provided. The groove of the diffusion plate provided by embodiments of the disclosure combines with the microstructure on the surfaces of the light guide plate to form a stable structure together so that the relative movement between them is reduced, and the white spot problem caused by the microstructures being scratched is also reduced.