Quantum Dots - Page 5

Update: It seems we were mistaken, this prototype is not a hybrid QD-OLED, but a 'regular' OLED. This is still an impressive development - a rollable inkjet-printed OLED display.

TCL and Juhua Printing demonstrated a 31" FHD inkjet-printed rollable hybrid QD-OLED TV prototype. The display uses an IGZO (Oxide-TFT) backplane and TCL says that it has an aperture ratio of over 50%, brightness of 200 nits and a 90% DCI-P3 color gamut.

TCL's hybrid display technology (which TCL calls H-QLED) uses a blue OLED emitter coupled with red and green QD emitters. All three emitter materials are combined and printed using ink-jet printing technology.

In October 2019 Samsung Display formally announced its decision to invest $10.85 billion in QD-OLED TV R&D and production lines. SDC was supposed to start the plan in 2019, but according to a report from China the Company is delaying its initial investment. Originally mass production was supposed to begin in Q1 2021, but this may happen later if the investment is delayed.

It seems as if equipment makers expected to receive orders for production equipment, but that did not happen. The report says that Samsung decided to make personnel changes and transfer in January 2020 and only after these changes will the company finalize its investment plan in the new OLED TV fab.

The government of the Guangzhou province in China announced that it aims to help its local display industry and have allocated large funds - up to 2 billion RMB (around $285 million USD) in subsidies per company. The goal is to help companies invest in production of emerging display technologies - including OLEDs, Micro-LEDs, QD-LEDs, 3D displays, e-paper displays, graphene enhanced display technologies and more.

The subsidies will be given to companies that start trial production, and when mass production begins.

Researchers from Samsung's Advanced Institute of Technology (SAIT) developed a new method to increase the efficiency and lifetime of self-emissive Cadmium-free quantum dots. The researchers used Indium Phosphide QDs in a new structure that prevents oxidation and energy leaks and also absorbs current faster.

The researchers say that the new structure enhancements increases the internal quantum efficiency to almost 100 (the EQE reached 21.4%) while increasing the lifetime to a million hours (at a high brightness of 100 cd/m²). The maximum brightness is 100,000 nits. This performance is comparable to Cadmium-based QDs.

Samsung released a short video that may help you find burn-in marks in your OLED TV. The video should be run on your OLED TV, and it shows a red image that will (according to Samsung) show visible marks if there are any issues in your TV.

If you did find such marks - Samsung suggested to contact a service center - or switch to one of its QLED LCDs... I wonder if this is a mart marketing move as Samsung itself is now committed to OLED TV technology and will start producing QD-OLEDs in 2021. Samsung is probably hoping that no one will remember this video by then...

Samsung Display formally announced its decision to invest ₩13.1 trillion (around $10.85 billion USD) in QD-OLED TV R&D and production lines. The investment plan will span 6 years (2019-2025) and the first step will be to convert an LCD production line in SDC's L8 fab in Tangjong, Korea to QD-OLED production.

The Tangjong line will be converted from 125k monthly substrates of LCD production to 30k monthly QD-OLED substrates, and mass production will begin in Q1 2021. In the long run SDC plans to convert all its 8-Gen LCD lines (360,000 monthly substrates) to QD-OLED production (which will yield around 100,000 monthly QD-OLED substrates).

Business Korea says that Samsung Display has finalized its QD-OLED TV production plans. The company will invest 13 trillion Won (around $10.85 billion) to convert its L8 LCD production line in Tangjeong to QD-OLED production.

According to the report, SDC's investment will be the single largest investment in Korea's display industry ever. The L8-1-1 LCD line will be shut down immediately, and converted to QD-OLED production. SDC will also shut down its second line (L8-2-1) and in total the two fabs will be able to produce 200,000 8-Gen glass substrates each month (down from the current 360,000 substrates in LCD production today). Mass production of QD-OLED panels will begin in 2022.

China-based display maker CSoT demonstrated several new OLED display prototypes and technologies at SID 2019, and this great new video shows these displays in action.

First up is a 31" 4K (3840 x 2160, 144 PPI) AMOLED that was produced using an ink-jet printing process on an IGZO substrate. The peak brightness is 200 nits and the refresh rate is 120 Hz. This seems to be the same panel announced in March 2018 by Joshua Printing Display Technology (established by CSoT and Tianma in 2016). The display has some noticable defects.

Samsung has not committed yet to its QD-OLED TV technology, and according to a new report from Korea the company will make its final decision by the end of June (or early July). Samsung originally planned to hold an investment review committee on April 2019 but that did not materialize. According to an industry insider, Samsung already decided to start QD-OLED TV production, the only question is timing.

Samsung's plan is to shut down an LCD TV production line and convert it to QD-OLED production - although Business Korea now suggests that another possibility is to build a new production line instead of its planned A5 fab (which was delayed/canceled in early 2018).

CSoT demonstrated the first public QD-OLED display, during SID 2019. The company unveiled a 6.6" display that features a relatively low resolution (384x300) and brightness (50 nits). The backplane of this prototype is an Oxide-TFT.

The QD-OLED is made from blue OLED emitters with a quantum-dots color conversion layer. This is a similar design to Samsung's QD-OLED TV technology. Interestingly earlier this year CSoT's parent company TCL has unveiled a different QD-OLED technology it refers to as H-QLED which uses a combination of OLED and QD emitters.