Rumors that Samsung will use the white-OLED-with-color-filters approach emerged from Korea this week.
I normally don't report rumors, but this one is just too good to pass up. According to a recent article on Display Daily, Samsung might be returning to the OLED TV business using white-light OLED material with color filters, an approach that LG uses in its OLED TVs.
Previously, Samsung used separate red, green, and blue OLED material in separate subpixels, but that requires a more complex—and thus more expensive—manufacturing process. The OLED materials are deposited onto a substrate through tiny holes in a metal shadow mask, a technique that is very difficult to implement in large areas because of the extreme accuracy required.
By contrast, the white-OLED approach layers red, green, and blue OLED material together with no need for a shadow mask. The light from the three layers combines to form white light, which then passes through RGB color filters, much like an LCD TV. This is said to be easier and less expensive than the RGB approach, but the filters greatly reduce the final light output, making it more difficult to build a high dynamic-range panel. (The article does refer to LG's HDR OLED demo at CES this year, saying that it had great contrast, but the peak brightness was nowhere near what LED-LCD TVs can achieve.)
There is no way to verify if these rumors are true—at this point, I'm sure Samsung would say "no comment." The Display Daily article speculates that the motivation might be higher profits, especially since LCD TV margins are so incredibly thin. Whatever the reason, having more manufacturers in the OLED TV game would be great news for all video buffs. Of course, only time will tell, and I will be watching closely for any info in this regard.
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