A system and method for presenting a visual message by illumination. The system includes an LED light source and a transparent sheet. The transparent sheet is a transmission medium that includes a modified surface that refracts light in designated areas. The LED source illuminates the transparent sheet so that the LED illumination of the sheet achieves a visual effect of a neon filled glass tube lighting. The illumination system, however, is neon-free. The modified surface includes a disruption pattern or a printed ink layer, or the sheet includes two modified surfaces, one modified with a disruption pattern and another one modified with a printed ink layer. The LED light source includes multiple LED emitters on a circuit board. The LED light source projects light through the sheet in a direction that is parallel to a surface plane of the sheet.

An optical device includes a lower surface that is substantially transparent. The optical device further includes an upper surface disposed opposite the lower surface and having a first specular layer disposed thereon. The optical device further includes a first lateral surface extending between the lower surface and the upper surface and having a second specular layer disposed on at least a portion thereof.

The present invention relates to a liquid crystal display comprising an absorption dye, wherein the liquid crystal display of the present invention may enhance color gamut and brightness by transmitting pure red, green, and blue (RGB) wavelengths emitted from a light source as much as possible and absorbing unnecessary wavelengths other than the RGB wavelengths.

A vehicle lamp includes a plurality of light sources and a light guide plate configured to guide light from the plurality of light sources, the light guide plate has a light diffuser configured to diffuse the light, the light diffuser has a plurality of hole sections, the hole section passes through the light guide plate in a thickness direction thereof and includes a light guide emission surface and a light guide incident surface opposite to each other in a direction in which the light entering from one end surface advances, and a plurality of concave stripe section formed in parallel to a direction crossing with the direction in which the light advances is provided at the light guide emission surface and the light guide incident surface.

Disclosed herein is a display apparatus. The display apparatus includes a backlight unit configured to emit light, a display panel positioned in front of the backlight unit; and an optical film positioned in front of the display panel, and the optical film includes a base layer, a first refractive layer positioned in front of the base layer, a second refractive layer positioned in front of the first refractive layer and having a lower refractive index than the first refractive layer, a third refractive layer positioned at the rear of the base layer, and a fourth refractive layer positioned at the rear of the third refractive layer and having a lower refractive index than the third refractive layer.

An electronic device including a body and a light source module is provided. The body has a side on which an unstable display is disposed and another side on which a bi-stable display is disposed. The light source module is arranged inside the body and configured to provide a light source to one or none of the unstable display and the bi-stable display.

The present invention is directed to an optical member including: a first layer that includes a first region having a refractive index n.sub.1 and a second region having a refractive index n.sub.3; and a second layer disposed on a first main surface of the first layer so as to be in contact with the first region and the second region, the second layer having a refractive index n.sub.2. The first layer includes a plurality of said second regions adjoining the first region along a planar direction of the first layer; the plurality of second regions constitute a geometric pattern; and n.sub.1 to n.sub.3 satisfy the relationship n1<n3<n2. When an optical member according to the present invention is integrated with a lightguide in use, excellent light extraction function is exhibited and leakage of light due to light scattering is suppressed, while attaining good mechanical strength at the same time.

The invention provides a lighting unit comprising a waveguide for providing first light (111) having a first spectral distribution and second light (121) having a second spectral distribution emanating from a waveguide (100) in different directions, wherein the first spectral distribution and second spectral distribution differ. For instance, the first light (111) and the second light (121) have different color temperatures.

A light guide is provided. The light guide includes a first major surface comprising an array of Z-shaped extraction elements. Each Z-shaped extraction element includes: a first face; a second face adjoining the first face, wherein the first face and an upper portion of the second face define an indentation projecting inwardly from a plane defined by the first major surface; and a third face adjoining the second face, wherein the third face and a lower portion of the second face define a protrusion projecting outwardly from the plane defined by the first major surface.

In the light guide plate, a surface of the reflection sheet away from the bottom surface is configured as a reflection surface. Regions of the light guide plate body except the reflection sheets are configured as light transmission regions. The light transmission regions and the reflection sheets are alternately arranged; a plurality of transmission protrusions are disposed at the light transmission region inside the light guide plate body; a reflection coating layer is formed on side surfaces of each of the transmission protrusion. Since the reflection sheets are provided inside the light guide plate body, the reflection sheet reflects light which is directed from the one surface and passes through the display panel, and prevents the light, directed from the other surface of the display apparatus, from passing through the display panel and interfering with the normal display of the one surface.