Light enhancing
Broader spectrum light is enhanced with light of a narrower spectrum.
1. An apparatus comprising
an image projection lamp operable for a limited number of hours before failure, the image projection lamp emitting light having a spectrum;
a light source operable for more than the limited number of hours before failure, the light source emitting light having a spectrum narrower than the spectrum of the light emitted from the image projection lamp; and
a device to project digital images onto a viewing surface using the light source alone.
2. The apparatus of claim 1 in which the light source is usable to display information.
3. The apparatus of claim 2 in which the information relates to an audio only function.
4. The apparatus of claim 2 in which the information comprises a menu.
5. The apparatus of claim 1 in which after the device is turned on, the light source begins to emit light more quickly than the image projection lamp.
6. The apparatus of claim 1 in which the device uses selectively either the light source alone or the light source in combination with the image projection lamp.
7. The apparatus of claim 1 in which the device first projects the digital image from the light source and then after a period of time projects the digital image from the light source and the image projection lamp in combination.
8. The apparatus of claim 1 in which the image projection lamp comprises a UHP lamp.
9. The apparatus of claim 1 in which the light source comprises an LED.
10. The apparatus of claim 9 in which the light source comprises a red LED.
11. The apparatus of claim 1 in which the light source comprises a laser.
12. The apparatus of claim 11 in which the light source comprises a red laser.