초록 ▼

A venetian blind having prismatic reflective slatted panels permits the passage of indirect rays of sunlight into a space to be illuminated while reflecting direct rays of sunlight away from the space to be illuminated. The prismatic reflective slats are supported for rotation in unison to follow el

A venetian blind having prismatic reflective slatted panels permits the passage of indirect rays of sunlight into a space to be illuminated while reflecting direct rays of sunlight away from the space to be illuminated. The prismatic reflective slats are supported for rotation in unison to follow elevational movements of the sun. Each of the prismatic panels is made from a light transmissive material having a front face directed at the sun and an opposing rear face upon which reflective prisms are formed for internally reflecting rays of sunlight that strike the front face of each slatted panel at approximately a 30°angle from a line normal to the front face thereof. The orientation of the reflecting prisms in this manner maximizes overall visibility between adjacent slatted panels. A diffusion panel is secured to the rear face of each prismatic reflective slat for diffusing indirect rays of sunlight transmitted through the prismatic reflective slats. The prisms formed upon the rear face of each reflective slat may be linear prisms or triangular pyramidal prisms.

대표청구항 ▼

A shade mechanism for permitting the passage of indirect rays of sunlight into a space to be illuminated while reflecting direct rays of sunlight away from the space to be illuminated, said shade mechanism being adapted to minimize interference with vision through the shade mechanism for a person lo

A shade mechanism for permitting the passage of indirect rays of sunlight into a space to be illuminated while reflecting direct rays of sunlight away from the space to be illuminated, said shade mechanism being adapted to minimize interference with vision through the shade mechanism for a person located within the illuminated space, said shade mechanism comprising in combination: (a) a plurality of slatted panels extending parallel to one another and spaced apart from one another, each of said plurality of slatted panels extending about a longitudinal axis thereof; (b) support means for supporting said plurality of slatted panels parallel to one another, said support means supporting each of said plurality of slatted panels for rotation about the longitudinal axis thereof; (c) tilt means cooperating with said support means for causing each of said plurality of slatted panels to rotate in unison about its longitudinal axis while maintaining said plurality of slatted panels parallel to one another; (d) each of said plurality of slatted panels being composed of a substantially clear, light transmissive material, each such panel having a front face for being directed at the sun and an opposing rear face, said rear face of each such panel having prisms formed thereon, said prisms causing rays of sunlight that strike the front face of each such panel in a predetermined band of angles relative to the normal to be internally reflected and emitted back out through the front face of each such panel, the predetermined band of angles extending substantially symmetrically about a central focal angle, said central focal angle extending within a range of about 20°-40°relative to the normal while said prisms permitting rays of sunlight that strike the front face of each such panel from an angle that lies outside said predetermined band of angles relative to the normal to be transmitted therethrough into the space to the illuminated.