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From: Don Klipstein on 30 Mar 2010 20:49
In <r225r5pndacb7ijv5nqd7s15usimb8ubbc(a)4ax.com>, Archimedes' Lever wrote:
>On Tue, 30 Mar 2010 11:33:45 -0700, Bill Martin <wwm(a)wwmartin.net> wrote:
>
>>Archimedes' Lever wrote:
>>> On Sun, 28 Mar 2010 22:45:46 -0700 (PDT), "miso(a)sushi.com"
>>> <miso(a)sushi.com> wrote:
>>>
>>>> Part of the problem with LCD is the backlight spectrum. The LED
>>>> backlights are lower power, but the color is poor.
>>>
>>> This is why OLED is in our true future, but Sharp wants you to think
>>> about that future with pixels comprised of four sources, not three.
>>>
>>> I like it. Sight unseen. Just knowing what is involved.
>>>
>>> Look what the printer boys have done.
>>But that is CMYK, the inverse of RGB plus real black. An extra way to
>>make yellow seems redundant.
>>
>>bill
>
> You missed the point. Several printer makers now have five, six, or
>even seven ink 'colors' to make their print jobs more accurate.

I know of 4 somewhat common inkjet printer ink colors in addition to
the basic 4 of CVMYK. 2 of those improve in ways unrelated to expanding
the color gamut.

"Photo Magenta" and "Photo Cyan" are lighter shades of magenta and cyan.
These are used when only a light sprinkling of magenta and/or cyan dots
is needed. This permits such a "light sprinkling" to have fainter dots
more closely spaced to avoid what can otherwise be a "visible sprinkling
of dots".

Then I have seen red and green inks for purposes of expanding the color
gamut, apparently to me mainly to achieve shades of red and green that
CMYK cannot achieve.

- Don Klipstein (don(a)misty.com)
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