Patent ID: 7527394
Filing Date: 2009-05-05
Classification: H04N

Abstract:
1. An image-displaying apparatus comprising: at least one light-emitting diode, a relay lens, at least one secondary light source-forming prism arranged between the light-emitting diode and the relay lens, and a light valve, said at least one secondary light source-forming prism having an incident rectangular surface, an exit rectangular surface opposed to the incident rectangular surface, and at least four polygonal surfaces each extending from the incident rectangular surface; the incident rectangular surface facing the at least one light-emitting diode; the exit rectangular surface facing the relay lens; a surface area of the incident rectangular surface being greater than a surface area of the exit rectangular surface so that the exit rectangular surface and the at least four polygonal surfaces divide light which is emitted from the light-emitting diode and enters the incident rectangular surface, into a first light flux and second light fluxes, wherein the first light flux is emitted from the light-emitting diode, enters the incident rectangular surface and is emitted from the exit rectangular surface; wherein the second light fluxes are emitted from the light-emitting diode, enter the incident rectangular surface, and are transmitted and emitted from at least one polygonal surface of the at least four polygonal surfaces; and wherein the relay lens is illuminated by the first light flux and the second light fluxes.