Power consumption - Page 8

Taiwan-based INT Tech announced that it has produced new AMOLED microdisplay samples at its $143 million fab in Taizhou in Zhejiang province, China, and the company is still on track for mass production in Q4 2021.

The new 0.7-inch INT Tech uNEEDXR display is a direct-emission display that features a brightness of over 5,000 nits, 3147 PPI and a low power consumption (less than 500mW@5000nits).

Samsung Display announced its latest OLED panel, the Eco²OLED, which increase light output by 33% compared to SDC's previous OLED panels. The increase light translates into a power consumption reduction of up to 25%.

For the Eco²OLED panel, Samsung finally managed to commercialize a polarizer-free OLED, after many years of R&D. The first phone to adopt this display will be Samsung's upcoming Galaxy Fold 3. Interestingly Samsung says that the new design also enabled it to incorporate a high-quality under-the-display camera as more light is entered through the OLED.

Researchers from the University of Michigan developed a new electrode design for OLED devices, that can increase light output by up to 20% compared to current electrodes. The new electrode is compatible with current production processes.

The new design helps to minimize the waveguiding effect, which traps around 80% of the light produced by the OLED emitters. The researchers used a modal elimination approach, which involves optimizing the organic stack and the replacing the ITO anode with a thin film of silver deposited on a layer of copper. This kind of approach can be applied to other light emitting structures such as inorganic LEDs, perovskite LEDs, quantum dots and more.

Canada-based OTI Lumionics developed innovative OLED materials and technologies. In August 2020 the company announced that it will start shipping its 2nd-gen ConducTorr Cathode Patterning Materials (CPM) by the end of 2020 to customers, which will use these to create OLED displays with under-the-display camera and face unlock technologies.

We had a short talk with the company's founder and CEO, Dr. Michael G. Helander, during which we discussed the company's technology, status and future plans.

During SID Display Week 2021, Kyulux detailed its latest TADF material performance. The red and green materials are "close to commercialization", and the company reports "excellent progress" with its blue emitter.

Using simulations, Kyulux shows how its Hyperfluorescence system is more efficient than a comparable phosphorescence emitter. While both emitters feature pretty much the same EQE, the narrow spectrum of the HF system which results in higher light intensity and can enable more efficient displays - by around 10%, according to Kyulux.

Tianma demonstrated a new AMOLED display panel at SID Displayweek, that sports a micro-lens array that helps to decrease power consumption by 10-15%.

The so-called MLP panel is 6.2" in size with a 876x2142 resolution (373 PPI) and a brightness of 420 nits. The pixel configuration is, interestingly, YYG - yellow and green sub-pixels, which means that this display uses color filters.

BOE demonstrates several new OLED technologies at SID Displayweek 2021. First up is a new rollable display. The new display is 8-inch in size, and it features a resolution of 2592x2176 and a bending radius of 4 mm. BOE says the new display passed over 200,000 sliding cycles.

Last year at Displayweek 2020, BOE demonstrated a 12-inch rollable OLED. It has since been working with LG Electronics on the company's rollable smartphone (which was since canceled as LG withdrew from the smartphone market) and with OPPO on a 7.4-inch sliding OLED phone.

In March 2021 Tianma unveiled a new OLED display technology, which it refers to as CFOT OLED - a polarizer-free OLED that adopts color-filters instead to remove reflections. The company demonstrated a 8.03" CFOT OLED prototype at SID Displayweek 2021:

Tianma says that a CFOT OLED enables a thinner design, improves the light emittance and also cuts the power consumption by 20%. The 8.03" display offers a resolution of 2000x2544 (403 PPI).

Samsung Display has been developing polarizer-free AMOLED displays for many years, and last year UBI detailed how the company plans to use color filters to eliminate the need for polarizers and so increase the efficiency of their OLED panels while also lowering the thickness.

DSCC posted an interested article that details Samsung's upcoming polarizer-free OLEDs, which it brands as POL-LESS OLEDs. The first OLEDs to adopt this new structure are expected to be adopted in Samsung's Galaxy Fold 3 later this year.

Samsung Display has recently announced two design wins for its smartphone LTPO AMOLED displays - the Oppo Find X3 series and the OnePlus 9 Pro. Both adopt the same 6.7-inch 1440x3216 120Hz HDR10+ (1,300 nits peak) LTPO AMOLED display.

Samsung also announced that in the past the company's priority was to improve the image quality and the design of its OLED displays. Moving forward, SDC will focus on lowering the power consumption of its OLED displays. SDC will do so by developing low-power materials and "optimizing power-efficient technologies".