Patent ID: 8192031

Claim:
A projection type display apparatus for displaying an image, comprising: a light source; a first lens array having a plurality of lens cell areas by which emission light emitting from the light source is divided into a plurality of light fluxes; a second lens array having a plurality of lens cell areas through which the emission light fluxes from the first lens array pass; a collecting lens which collects the emission light fluxes from the second lens array; a display element which receives the light fluxes collected by the collecting lens to pass through or reflect; a projection lens which emits the transmission light or the reflected light from the display element; and a light shielding unit which light-shields the light fluxes from the first lens array to the second lens array, wherein, a plurality of rectangular lens cell areas of the second lens array are arranged in a matrix manner with upper and lower 2J (J is an integer number of 1 or larger) rows×right and left 2K (K is an integer number of 1 or larger) rows about an optical axis; wherein, the light shielding unit light-shields at least parts of all the lens cell areas except for the lens cell area in contact with an optical axis among a first group of lens cell areas obtained by arranging L (L is an integer number of 3 or larger) lens cell areas adjacent to each of the four lens cell areas in an upper and lower directions with respect to the four lens cell areas in contact with the optical axis, and a second group of lens cell areas obtained by arranging M (M is an integer number of 1 or larger) lens cell areas adjacent to each of the four lens cell area in a right and left directions with respect to the four lens cell areas in contact with the optical axis, and a light shielding area in the lens cell area in contact with the optical axis is smaller than that in any of the lens cell areas except for the lens cell area in contact with the optical axis.