23. feb 2018, 09:20
#267941
Der er høje forventninger til ink jet printing af det organiske materiale ved OLED skærme, og at denne produktionsfremgangsmåde vil gøre underværker for priserne og medvirke at vi også ser OLED paneler i mellem-segmentet både prismæssigt og størrelsesmæssigt.
Da graden af spild ved OLED inkjet printing er markant lavere end ved vapor (fordampning), men ink jet printing af OLED paneler er rettet mod større paneler og ej ideelt til mobilskærme eller wereables.
Bla de 21.6" - 4K skærme som der er blevet omtalt fra JOLED i efteråret, er eftersigende ved brug af Ink jet og ej evaporation.
LG har også understreget at inkjet OLED printing kunne være en måde at gøre OLED panelproduktionen low cost.
De potente produktionsfabrikker som LG har i sinde at tage i brug her i 2018, jeg antager disse også er med evaporation?
Da graden af spild ved OLED inkjet printing er markant lavere end ved vapor (fordampning), men ink jet printing af OLED paneler er rettet mod større paneler og ej ideelt til mobilskærme eller wereables.
Bla de 21.6" - 4K skærme som der er blevet omtalt fra JOLED i efteråret, er eftersigende ved brug af Ink jet og ej evaporation.
LG har også understreget at inkjet OLED printing kunne være en måde at gøre OLED panelproduktionen low cost.
LG Display is currently producing WRGB OLED TVs panels using an evaporation process, and it was reported a while back that LGD considers ink-jet to be a viable route towards lower cost production (which may also lead to more efficient and higher quality direct-emission RGB OLED TVs). LGD has already setup a pilot 8.5-Gen production line and has developed a 55-inch printed OLED prototype (this was not publicly shown yet).Samsung siges også at være fokuseret på dels deres microLED, eller rettere deres & deres, microLED er vist et Sony tech men Samsung pønser vist også på ink jet OLED printing og igen være en spiller på TV markedet for OLED paneler og ikke kun i det mindre segment som mobilskærme, og må før eller siden forholde sig til den endefuld LG-display de senere år har givet dem på TV fronten kva OLED..
LG is reportedly using Japan's Tokyo Electron printing equipment, and soluble emissive materials supplied by Merck.
Samsung is currently not producing OLED TVs, but following a large drop in its premium TV market share (lost mostly to LG's OLED TVs) the Korean company is looking to find a next-generation TV technology to bring it back on track. Samsung seems to be focused on two technologies, Micro-LEDs and ink-jet printed OLEDs.https://www.oled-info.com/oled-ink-jet- ... early-2018
Samsung is using Kateeva's printers, and emissive materials supplied by DuPont, to develop a 8.5-Gen production process with a goal to produce 55-inch panels.
Printing OLEDS: The OLED substances (polymers, small molecules) are dissolved and the resulting inks are applied to a glass substrate by a printer head. Embedded between anode and cathode, the organic molecules are electrically excited, thus producing light.iforhold til fordampning hvor der er et højt spild af matriale, (ihvertfald iflg Merck aka førende leverandør af organisk matriale til at lave OLED paneler via Ink jet printing..
Costly vapor (fordampning)
So why haven't OLEDs become the global standard yet? On the one hand, liquid crystals, a well-established field in which we are the market and technology leader, continue to meet increasing quality requirements. On the other hand, OLED production poses a challenge as it is still very complex and costly. For each diode, several ultrathin layers of material must be deposited with pinpoint precision in very small portions onto a glass plate. The closer the diodes are to one another, the higher the resolution of the display. In the currently prevailing coating process, a metal mask is used to evaporate and deposit the OLED materials. This process is repeated several times with different materials and masks. High costs and low material utilization are major disadvantages of this process. More than half of the OLED materials are lost during deposition. And last but not least, the energy and environmental footprint of this method is rather modest. ‟For technical and financial reasons, the evaporation method has limitations in the mass production of large-area OLED displays,″ says Anja Jatsch, Project Manager OLED Formulation. ‟For television screens, our customers are currently using a process that combines white OLEDs with color filters. This is yielding very good results for televisions with very large screens.”
De potente produktionsfabrikker som LG har i sinde at tage i brug her i 2018, jeg antager disse også er med evaporation?