Laser backlighting for displays
AssigneeArasor International Ltd
InventorsChris STUART, Allen Massie EARMAN, Greg NIVEN
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Abstract
Displays such as LCD panels are illuminated using frequency-doubled vertical extended cavity surface emitting lasers (VECSELs) as efficient light sources. Visible light from the VECSELs are directed to an illuminating panel using optical fibers and/or optical gratings to provide substantially uniform illumination of the illuminating panel. Visible light from the illuminating panel, which can be provided at a particular number of primary wavelengths by the VECSELs, is then used to illuminate the display.
Claims20
A display apparatus, the display apparatus comprising:
- a laser source comprising a plurality of frequency-doubled vertical extended cavity surface emitting lasers for generating visible light at least one primary wavelength;
- and
- an optical coupling arrangement for directing at least a portion of the visible light onto a back panel of an LCD panel;
- wherein the optical coupling arrangement is configured to distribute the visible light over at least a substantial portion of the back panel to provide illumination of the LCD panel.
A display apparatus, the display apparatus comprising:
- a laser source comprising a plurality of frequency-doubled vertical extended cavity surface emitting lasers for generating visible light at least one primary wavelength;
- and
- an optical coupling arrangement for directing at least a portion of the visible light onto an illuminating panel;
- wherein the optical coupling arrangement is configured to distribute the visible light over at least a substantial portion of the illuminating panel to provide illumination of at least one of a transmissive display panel or a reflective display panel.
A method for illuminating a display, the method comprising:
- providing a laser source comprising a plurality of frequency-doubled vertical extended cavity surface emitting lasers for generating visible light at least one primary wavelength;
- providing an optical coupling arrangement;
- and
- directing at least a portion of the visible light from the laser source onto an illuminating panel using the optical coupling arrangement;
- wherein the optical coupling arrangement is configured to distribute the visible light over at least a substantial portion of the illuminating panel to illuminate the display.
Dependencies are inferred from the claim text.