Patent ID: 8793104

Claim:
A flat panel display device comprising in order a first waveguide, a transition waveguide and a second waveguide, wherein said second waveguide and display panel has display surface and a substantially wedged shape and a plurality of linearly connected sections, each of the plurality of linearly connected sections having a respective display surface with a tilt angle that decreases with distance from the transition waveguide, the thickness and tilt angle of each respective display surface being arranged such that: first rays entering the first waveguide at a first angle of incidence pass through the first waveguide and transition waveguide and then exit the flat panel display device at a first exit angle with respect to the respective display surface of a first said linearly connected section of the second waveguide through which the first rays exit, said first linearly connected section being adjacent the transition waveguide, and second to nth rays entering the first waveguide at respective second to nth angles of incidence pass through the first waveguide and transition waveguide and then exit the flat panel display device at second to nth exit angles with respect to the respective display surfaces of second to nth said linearly connected sections of the second waveguide through which the second to nth rays exit, wherein an exit angle of the first rays is substantially the same as an exit angle of each of the second to nth rays to compensate for distortions in the displayed image generated by the light path of incident image rays in said first waveguide and said transition waveguide.