Jamis dug-up an interesting recent patent on Filte
Post# of 22465
Posted On: 05/31/2016 6:20:41 PM
Jamis dug-up an interesting recent patent on Filter-less LED displays using QDots...also identifies QMC & Nanosys as sources & contains some notable findings, like:
[0042] Without deviating from the basic concept of the invention of a Filter-less Color Display, color filters 48 of Fig. 1 can be used on top of the quantum dots, between the person viewing the screen and the quantum dots, to further improve the visibility and contrast of the image content e.g. in direct sunlight. The non-zero Stokes' shift of the chosen quantum dots allows one to use filters which transmit the full emission spectrum but absorb light from the viewer's ambient to prevent the ambient light from exciting the quantum dots in similar manner that the blue to near UV emission from the light source excites the quantum dots. In contrast to color filters that are placed between the light source and the color converters, which the invention allows one to avoid if desired, these On-top' contrast enhancing color filters that block ambient light from exciting the quantum dots cause no efficiency loss.
[0043] Some such variations include substituting or supplementing any of the quantum dots above with one or more organic color converters, organic luminophors, the light- emitting constituents of OLEDs, or conventional inorganic phosphors. An FLCD™ device as described above is provided as one example of devices that can be formed in accordance with the invention. By careful selection of the QDs, gamut values of 130% NTSC or 150% Adobe can be achieved by using the already mentioned combination of peak emission wavelengths and FWHM values of or smaller than 30nm.
https://patents.google.com/patent/WO201605461...Corp"
* Sidenote ; the inventors appear to be independent hired guns, apparently (in this case) engaged to optimize LED phosphor performance; Regina Mueller-Mach & Gerd O. Mueller: http://www.gommaconsult.com/services.html
*wonder who engaged their services, QMC[?], Nanosys[?], a combination of both perhaps[?]
[0042] Without deviating from the basic concept of the invention of a Filter-less Color Display, color filters 48 of Fig. 1 can be used on top of the quantum dots, between the person viewing the screen and the quantum dots, to further improve the visibility and contrast of the image content e.g. in direct sunlight. The non-zero Stokes' shift of the chosen quantum dots allows one to use filters which transmit the full emission spectrum but absorb light from the viewer's ambient to prevent the ambient light from exciting the quantum dots in similar manner that the blue to near UV emission from the light source excites the quantum dots. In contrast to color filters that are placed between the light source and the color converters, which the invention allows one to avoid if desired, these On-top' contrast enhancing color filters that block ambient light from exciting the quantum dots cause no efficiency loss.
[0043] Some such variations include substituting or supplementing any of the quantum dots above with one or more organic color converters, organic luminophors, the light- emitting constituents of OLEDs, or conventional inorganic phosphors. An FLCD™ device as described above is provided as one example of devices that can be formed in accordance with the invention. By careful selection of the QDs, gamut values of 130% NTSC or 150% Adobe can be achieved by using the already mentioned combination of peak emission wavelengths and FWHM values of or smaller than 30nm.
https://patents.google.com/patent/WO201605461...Corp"
* Sidenote ; the inventors appear to be independent hired guns, apparently (in this case) engaged to optimize LED phosphor performance; Regina Mueller-Mach & Gerd O. Mueller: http://www.gommaconsult.com/services.html
*wonder who engaged their services, QMC[?], Nanosys[?], a combination of both perhaps[?]
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