Patent ID: 7372641
Filing Date: 2008-05-13
Classification: F21W,G02B,G02F

Abstract:
1. A device for contrast enhancement for display devices, comprising a focusing optical device including a lens for focusing incident light, a diaphragm with at least one aperture arranged, relative to the incident light, behind the lens, a light disposal element for absorbing light arranged, relative to the incident light, behind the diaphragm, wherein the optical device is arranged such that it focuses incident light and directs it through the at least one aperture to the light disposal element for absorbing extra light, and at least one light source arranged between the focusing optical device and the diaphragm, wherein a lens is used for focusing the emitted light from the light source, the light source supplying illumination of a display element viewable by a viewer and wherein at least one light source is arranged beside the lens used for focusing the emitted light.