| 摘要 |
A method of illuminating a light valve using a light source with modulated intensity to improve light throughput and color balance while minimizing loss of color resolution. A light valve is provided that includes a light input, a light output and a spatial light modulator including an array of pixels. The spatial light modulator is illuminated through the light input with light generated by a light source having a nominal lamp power dissipation level. Image data is provided and the array of pixels is configured based on the image data during a display period so that the image data is represented in light from the light source received at the light output. During a portion of the display period, the intensity of the light generated by the light source is increased to a high level above the nominal lamp power dissipation. During another portion of the display period, the intensity of the light generated by the light source is decreased to a low level below the nominal lamp power dissipation level. The average lamp power dissipation level over the display period is maintained at a level that does not exceed the nominal lamp power dissipation level. The light valve provided may additionally include a color sequencer for sequentially selecting one of a first, a second, and a third colorband of light that may reach the light output. Alternatively, the light valve provided may include a first, a second, and a third spatial light modulator and a color separator for directing a first, a second, and a third colorband of light from light received at the light input to the first, the second, and the third spatial light modulator, respectively. The light valve provided may also include a first, second, and third shutter between the color separator and the first, second, and third spatial light modulator, respectively.
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