Patent ID: 8272751

Claim:
A display apparatus comprising: a light modulation section having a plurality of translucent window sections; a light emitting section having a light source adapted to emit light; a light guide section having a tubular reflecting surface having a function of guiding the light from the light source to the light modulation section; and a light separation section provided to the light modulation section and disposed at the light source side of the light modulation section in parallel to or in substantially parallel to a lateral cross-sectional surface of the tubular reflecting surface, and having a light separation surface having a function of separating the light from the light guide section into transmitted light transmitted toward the light modulation section and reflected light reflected toward the light guide section, wherein the tubular reflecting surface narrows from the light modulation section side toward the light emitting section side so as to guide the reflected light to the translucent window sections, denoting a lateral cross-sectional area of an inside area of the tubular reflecting surface at an end on the light source side as S 1 , a lateral cross-sectional area of the tubular reflecting surface at an end on the light separation surface side as S 2 , and a maximum incident angle at which the light from the light source reflected by the tubular reflecting surface is input to the light separation surface as 0°, θ×√(S 2 /S 1 ) is equal to or greater than 110.