Power consumption - Page 5

Researchers at the University of St Andrews and the University of Cologne developed a polariton-based OLED device that offers angle-independent narrowband emission.

Polariton-Exciton quasiparticles are created when an OLED material is inserted into a high-quality microcavity. The researchers explain that by sandwiching the OLED device between two "mirrors", strong coupling and hybridization of light and matter can occur. This leads to the creation of the polariton particles. 

According to reports from Korea, LGD is now applying MLA to its gaming monitors, as it sees the growing gaming market as an important one for its future growth.

A few days ago LG Electronics unveiled its 2023 OLED TV range, which included the OLED G3, LG's slim all-in-one design OLED TV which is LG's brightest OLED TV yet. As we reported, LG Display announced today that its latest OLED panel adopts a micro-lens array to boost the performance.

Branded as META Technology, the OLED Panel is covered with a micro lens array to maximize the light emission. LGD says that this increase the brightness by 60%, and also increases the viewing angles by 30%. The G3 panel has a peak brightness of 2,100 nits.

In December 2021, LG Display unveiled its OLED.EX (Evolution and eXperience) technology, that are based on deuterium-enhanced compounds to increase brightness by up to 30%. The company now announced that it has completed upgrading all of its WOLED TV production lines (in Korea and China) to EX technology, and all new panels will use the new materials.

LG Display says to develop the OLED.EX technology, it has converted the hydrogen elements present in organic light emitting elements into stable deuterium. LGD extracts the deuterium compounds from water, and after stabilization, the compounds allow the OLED devices to be brighter - and also last longer.

OLED driver IC developer MagnaChip has launched its first power management integrated circuit (PMIC) specifically designed for IT devices with OLED displays.

A PMIC supplies power to electronic devices, and it is an important component in mobile devices to optimize power consumption. The newly-designed PMIC communicates with a system by using an Inter-Integrated Circuit (I2C) interface and can control functions such as output voltage control, ON/OFF block, output voltage sequence management, and more. It supports variable refresh rate OLED displays, from 60Hz to 240Hz.

Researchers from the University of Cambridge, led by Dr Alex Gillett, have studied the effect of host materials (the dielectric environment) on the performance of TADF OLED emitters, and specifically how the dipole moment of the host material can affect the rISC rate of the TADF component.

The impact of the toluene solvent dynamics on the riSC process of TXO-TPA (left: TXO-TPA in an explicit toluene solvent environment, right: TXO-TPA in vacuum)

The researchers tested several TADF OLED materials, and in some of these materials, the effect of different host materials can be quite dramatic. It is believed that commercial TADF devices could benefit from tuning the host and emitter combination to achieve higher performance, including a better efficiency roll-off as conversion of triplets into singlets can be accelerated.

Toray Research Center (TRC) is now hosting online webinars focused on display technologies. TRC, who supplies technical analysis and support for R&D and manufacturing, invites you to attend the online lectures at no cost, to learn more about OLED, microLED and QD technologies and analysis of OLED devices.

The webinars include recorded presentations, which will be available online up until to November 22. You can register for the webinars here.

The webinar will include three different presentations:

• OLED dopant ratio for efficient emission
• Laser-based processes for microLED production, analysis method to evaluate chips after transfer
• Degradation analysis of QD-LED devices

KT&T, established in 2020 as a spin-off from INT Tech with an investment of $143 million, has developed an OLED microdisplay that achieved a brightness of 12,000 nits, which is the highest brightness OLED microdisplay ever developed.

The new panel is based on KT&T's own uNEEDXR technology, which is a direct-emission (no color filters) design. The display achieves very high brightness and high efficiency.

Researchers from China's Shenzhen University are working towards efficient selenium-integrated TADF OLED emitters.

The researchers latest work detailed the structure-activity relationship between heavy atom effects and multiple resonance TADF performance. The researchers say that their new emitters effectively solve some of the issues inherent in TADF emission technology, specifically the sharp drop in emission at high brightness, what is called the emission roll-off.

Researchers from Russia's Ural Federal University developed a new OLED emitters based on cyanopyrazine-enhanced fluorophores. The presence of cyanogroup substance in the composition of fluorophores significantly increases the efficiency of the OLED emitters.

The researchers say that they have modified the pyrazine-based push-pull system with cyanogroup and studied how this affected the photophysical properties of the fluorophores and the performance of OLED devices based on these materials.