Light distribution control element and display apparatus provided with the same

A light distribution control element including a transparent base member, an adhering agent layer formed on one face of the transparent base member and a number of very small spherical transparent beads embedded in and fixed to the adhering agent layer, the light distribution control element characterized in that the adhering agent layer is constituted of hot melt adhering agents obtained by laminating a transparent layer and a colored layer in this order on the transparent base member and the transparent base member is constituted of a transparent body which is substantially isotropic optically or a transparent body having uniaxial optical anisotropy.

A rear projection type display apparatus including a projecting apparatus for projecting an optical image and a transmission type screen, on a rear face of which projected light from the projecting apparatus is incident, for displaying the projected light at a front face thereof, the rear projection type display apparatus characterized in that:

• the projecting apparatus comprises a single tube type projecting apparatus having a light source, two-dimensional optical switch elements for modulating light from the light source into an optical image in accordance with image information and a projecting lens for enlarging and projecting the optical image after the modulation;
• the transmission type screen comprises a light distribution control element having a transparent base member, a number of micro-lenses densely arranged on one face of the transparent base member and a light absorbing layer having very small opening portions substantially at focal positions of the micro-lenses, and light flux collimating means arranged on a projected light incident side of the light distribution control element, and further comprises:
• unpolarized light forming means for converting projected light emitted from the projecting apparatus and incident on the transmission type screen into substantially unpolarized light.

A liquid crystal display apparatus including a pair of transparent substrates of a lamination of transparent electrodes and orientation films and being bonded to each other with a constant clearance therebetween while orientation films formed faces opposed to each other, a liquid crystal layer enclosed in the clearance, voltage applying means for applying a voltage corresponding to an image signal across the transparent electrodes and a polarizer and an analyzer disposed on a light incident face side and a light emitting face side of the pair of transparent substrates,

• the liquid crystal display characterized in that a rear face of each of the pair of transparent substrates is provided with a backlight apparatus for emitting substantially parallel light and the light emitting face side of the pair of transparent substrates is provided with a light distribution control element comprising a transparent base member, a number of micro-lenses densely arranged on one face of the transparent base member and a light absorbing layer having very small opening portions substantially at focal positions of the micro-lenses, the light distribution control element being a light distribution control element in which the transparent base member is constituted of a transparent body which is substantially isotropic optically or a transparent body having uniaxial optical anisotropy.