Side-light display illuminator
First Claim
1. A light guide for illuminating a display screen, comprising:
- a vertical cone-shaped entrance surface comprising an aperture for admitting light beams emitted by an LED;
a folding mirror for reflecting the admitted light beams at an angle of approximately 90°
, and for horizontally collimating the admitted light beams;
a horizontal guide for guiding the reflected light beams to an exit surface; and
the exit surface positioned above a perimeter of a display screen for directing the guided light towards a portion of the display screen, the exit surface being tilted vertically from the horizontal at a slight angle to direct the guided light beams towards the display and to illuminate a displayed image, and being shaped horizontally as a concave lens to spread the guided light beams horizontally over an angular expanse of the display screen.
1 Assignment
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Accused Products
Abstract
A light guide for illuminating a display screen, including a vertical cone-shaped entrance surface including an aperture for admitting light beams emitted by an LED, a folding mirror for reflecting the admitted light beams at an angle of approximately 90°, and for horizontally collimating the admitted light beams, a horizontal guide for guiding the reflected light beams to an exit surface, and an exit surface positioned above a perimeter of a display screen for directing the guided light towards a portion of the display screen, the exit surface being tilted vertically from the horizontal at a slight angle to direct the guided light beams towards the display, and being shaped horizontally as a concave lens to spread the guided light beams horizontally over an angular expanse of the display screen.
9 Citations
7 Claims
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1. A light guide for illuminating a display screen, comprising:
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a vertical cone-shaped entrance surface comprising an aperture for admitting light beams emitted by an LED; a folding mirror for reflecting the admitted light beams at an angle of approximately 90°
, and for horizontally collimating the admitted light beams;a horizontal guide for guiding the reflected light beams to an exit surface; and the exit surface positioned above a perimeter of a display screen for directing the guided light towards a portion of the display screen, the exit surface being tilted vertically from the horizontal at a slight angle to direct the guided light beams towards the display and to illuminate a displayed image, and being shaped horizontally as a concave lens to spread the guided light beams horizontally over an angular expanse of the display screen. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification