LED backlighting system
First Claim
1. A liquid crystal display (LCD) backlighting device, comprising:
- a non-white light emitting diode;
a liquid crystal display;
a spectrum converting material located between the non-white light emitting diode and the liquid crystal display, where the spectrum converting material converts light from the non-white light emitting diode toward white light spectral radiancea second non-white light emitting diode that differs in color from the non-white emitting diode; and
where the spectrum converting material comprises first and second regions, where the first region converts light from the non-white light emitting diode toward a first white light spectral radiance and the second region converts light from the second light emitting diode toward a second white light spectral radiance.
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Accused Products
Abstract
A liquid crystal display (LCD) device having non-white and white light emitting diodes and a liquid crystal display. A spectrum converting material is positioned between non-white LEDs and the LCD to convert the non-white light from the LEDs toward a white light spectrum. The liquid crystal display may include a plurality of light emitting diodes, a light pipe, and a spectrum converting material. The spectrum converting material may be a phosphorized material located between the plurality of non-white light emitting diodes and the light pipe. A light extracting surface may be located near a first surface of the light pipe, a diffuser located near a second side of the light pipe, where the first and second sides are opposite sides of the light pipe, a reflective polarizer, and an liquid crystal display. The light from the light pipe may passes through the diffuser, the reflective polarizer, before backlighting the liquid crystal display. The non-white LEDs may include blue LED, ultraviolet LEDs, and the like.
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Citations
28 Claims
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1. A liquid crystal display (LCD) backlighting device, comprising:
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a non-white light emitting diode; a liquid crystal display; a spectrum converting material located between the non-white light emitting diode and the liquid crystal display, where the spectrum converting material converts light from the non-white light emitting diode toward white light spectral radiance a second non-white light emitting diode that differs in color from the non-white emitting diode; and where the spectrum converting material comprises first and second regions, where the first region converts light from the non-white light emitting diode toward a first white light spectral radiance and the second region converts light from the second light emitting diode toward a second white light spectral radiance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A liquid crystal display (LCD) device, comprising:
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a non-white light emitting diode; a light pipe; a spectrum converting material between the non-white light emitting diode and the light pipe where the spectrum converting material converts light from the non-white light emitting diode toward white light spectral radiance; a second non-white light emitting diode that differs in color from the non-white light emitting diode; where the spectrum converting material comprises first and second regions, where the first region converts light from the non-white light emitting diode toward a first white light soectral radiance and the second reqion converts light from the second non-white light emitting diode toward a second white light spectral radiance; a light extracting surface located near a first side of the light pipe; a diffuser located near a second side of the light pipe, where the first and second sides are opposite sides of the light pipe; a reflective polarizer; and a liquid crystal display; wherein light from the non-white light emitting diode and converted by the spectrum converting material enters the light pipe passes through the diffuser, the reflective polarizer, then backlights the liquid crystal display. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification