Patent ID: 8783877
Filing Date: 2014-07-22
Classification: G03B,H04N

Abstract:
1. A projection type display apparatus, comprising: a light source; two lens arrays through which light emitted from the light source passes; a display element which receives light from the two lens arrays; a projection lens which projects light emitted from the display element; and a light shielding unit which light-shields light between the two lens arrays, wherein, one of the two lens arrays has a plurality of lens cell areas arranged in a matrix manner including four lens cell areas in contact with an optical axis, a first group of L (L is an integer number of 3 or larger) lens cell areas in which the L lens cell areas include one adjacent lens cell area adjacent to each of the four lens cell areas in the first direction, and in which the other L−1 lens cell areas arranged in series straightly in the first direction next to the one adjacent lens cell area, and a second group of M (M is an integer number of 1 or larger) lens cell areas adjacent to each of the four lens cell area in second direction, which is the different direction from the first direction, the total of the lens cell areas include more lens cell areas than or equal to 8 lens cell areas in the first direction and include more lens cell areas than or equal to 4 lens cell areas in the second direction; wherein, in one light shielding condition of the light shielding unit, the light shielding unit light-shields the plurality of lens cell areas so that 1) each cell area in the first group of lens cell areas is light-shielded partially but not fully light-shielded, 2) each cell area in the second group of lens cell areas is light-shielded partially but not fully light-shielded, 3) each cell area in the four lens cell areas in contact with the optical axis is light-shielded partially or light-unshielded, and 4) each cell area in the other lens cell areas is light-shielded fully or partially.