Abstract: A light collimating system includes a transparent substrate, a plurality of conic elements and a screen. Each of the conic elements has a relatively narrow light incident side to which the screen is attached and a relatively wide light emitting side attached to the transparent substrate. Each of the conic elements has several segments which are arranged to form a truncated cone with an opening angle that decreases towards the light emitting side. The screen has a plurality of transmission areas covered by the light incident sides of the conic elements. Outside the transmission areas, incoming light is reflected from the screen. Diffuse light entering the conic elements through the transmission areas of the screen is collimated by refraction and total reflection at peripheral surfaces of the conic elements, resulting in a light bundle of narrow angular intensity distribution emanating from the transparent substrate.

Abstract: A light collimating system, comprising a transparent substrate, a plurality of conic elements and a screen. Each of the conic elements has a relatively narrow light incident side to which the screen is attached and a relatively wide light emitting side attached to the transparent substrate. Each of the conic elements has several straight or curved segments which are arranged to form a truncated cone with an opening angle that decreases towards the light emitting side. The screen has a plurality of transmission areas covered by the light incident sides of the conic elements. Outside the transmission areas, incoming light is reflected from the screen. Diffuse light entering the conic elements through the transmission areas of the screen is collimated by refraction and total reflection at peripheral surfaces of the conic elements, resulting in a light bundle of narrow angular intensity distribution emanating from the transparent substrate.

Abstract: A front lighting assembly light guide, comprising a light guide and a plurality of microstructures thereon. The light guide is laid on a front surface of a reflective LCD panel. A light source is placed at one end of the light guide. The plurality of microstructures are placed on a front surface of the light guide, deflecting light from the light source towards the LCD panel, illuminating the LCD panel. The plurality of microstructures are located isolated from each other, allowing to be distributed on the surface of the light guide at a spatial density according to the spatial intensity distribution of light from the light source, the density of microstructures increasing with lower light intensity. Thus uniform illumination of the LCD panel is achieved.