Patent ID: 6421109
Filing Date: 2002-07-16
Classification: G02B,G03H,H04N

Abstract:
An apparatus comprising:a display device comprising a plurality of light emitting pixels, wherein a first pixel is configured to emit a first and second light in first and second directions, respectively, wherein the first and second directions define a non-zero angle therebetween; a first optical element comprising first, second, and third holograms each one of which is configured to operate in an active state or an inactive state, wherein the first hologram is configured to diffract red bandwidth light when operating in the active state, wherein the first hologram is configured to transmit red bandwidth light without diffraction when operating in the inactive state, wherein the second hologram is configured to diffract green bandwidth light when operating in the active state, wherein the second hologram is configured to transmit green bandwidth light without diffraction when operating in the inactive state, and wherein the third hologram is configured to diffract blue bandwidth light when operating in the active state, wherein the third hologram is configured to transmit blue bandwidth light without diffraction when operating in the inactive state; wherein the first optical element is positioned to receive the first light, wherein the first optical element is configured to diffract the first light, wherein the diffracted first light emerges from the first optical element in a direction substantially parallel to the second direction.