- #1
gillwill
- 10
- 0
In making comparisons on efficiency in acquired ambient light for imaging devices, whether they be CCD and CMOS cameras or reflective displays, it seems the factoring is always based on Red, Green and Blue as if those are the only bands of visible light. For example, in acquiring\reflecting the color red at a pixel, if a pixel consists of three parallel subpixels of red, green and blue filters respectively, it would be claimed that around 1/3 of light striking a pixel is utilized; thereby other technologies with vertical filtering methods such as the Foveon camera and IMOD displays (still only RGB) can provide a 3x increase in efficiency, (implying a 90+ % utilization when using a 30-something % comparison ).
Isn't it much less than that in both cases. If I understand correctly "white" light, such as from sunlight, household lighting, etc…, consists of approximately equal proportions of all the bands of visible light, and if only implementing RGB filtering, what about the yellow, orange and violet wavelengths of incident light?
What about the ability of light combinations that are not exclusively RGB to create apperances of a color? For example, I've read some places where the "red" skin on an apple doesn't actualy reflect light in the red band of visibile light, but rather reflects combinations of other wavelenghths that make it appear "red".
At the very optimal, wouldn't a RGB subpixel system utilize less than 15% of the incident visible light, and a vertical filtering system less than half?
Isn't it much less than that in both cases. If I understand correctly "white" light, such as from sunlight, household lighting, etc…, consists of approximately equal proportions of all the bands of visible light, and if only implementing RGB filtering, what about the yellow, orange and violet wavelengths of incident light?
What about the ability of light combinations that are not exclusively RGB to create apperances of a color? For example, I've read some places where the "red" skin on an apple doesn't actualy reflect light in the red band of visibile light, but rather reflects combinations of other wavelenghths that make it appear "red".
At the very optimal, wouldn't a RGB subpixel system utilize less than 15% of the incident visible light, and a vertical filtering system less than half?