Next-generation blue OLED materials degrade early mainly due to the loss of oxygen in molecules at the interface between emission and electron transport layers, according to the UK’s National Physical Laboratory, which teamed up with the Samsung Advanced Institute of Technology to pull OLED junctions apart in minute detail. “The presence of these degradation molecules correlates negatively with the blue ...
Diodes is aiming at active matrix OLED panels with three-output power management dc-dc converter. Running from 2.9 to 4.8V, AL3565 produces: 4.6 to 5.0V (VPOS) with 0.5% accuracy at up to 500mA from a buck-boost converter -1.4 to -5.4V (VNEG) with 0.5% accuracy at up to 500mA from an inverting buck-boost converter 5.8 to 7.9V (AVDD) with 0.5% accuracy at ...
Imec has come up with a perovskite LED stack emitting light a thousand times brighter than state-of-the-art OLEDs. This result is a pivotal milestone towards a perovskite injection laser, promising applications in image projection, environmental sensing, medical diagnostics, and beyond. The maximum brightness of OLEDs remains limited; just think of trying to read your smartphone screen on a very sunny ...
Tokyo Institute of Technology has demonstrated a blue OLED with a forward voltage of 1.97V at 100cd/m2, and still emitting at lower voltages such as 1.5V (right). “Conventional blue OLEDs typically require around 4V for a luminance of 100cd/m2, this is higher than the industrial target of 3.7 V – the voltage of lithium-ion batteries,” according to the Institute. Its ...
It is possible to double the efficiency of colour OLED displays based on white-emitting material, and achieve 10,000 pixel-per-inch density, by replacing the rear reflector with a meta-material, according to Stanford University researchers. Generally there are two types of colour OLED display: displays with side-by-side patterns of red, green and blue emissive materials, and those with a white-emitting material (made ...
An engineered substrate is the key to a stretchable OLED display built by Korean lab KAIST, that could lead to stretchable full-colour displays. Updated with more photos below Right: display bent over a fingertip The novel substrate is there to allow rigid pixels to be incorporated. “Traditional intrinsically stretchable OLEDs have commercial limitations due to their low efficiency in the ...
A flexible sensor can map blood oxygen levels over large areas of skin, tissue and organs.
Roll-up glass is being developed for organic electronics. The bendable flexible material can be transferred directly from the melt to a roller for storage
Universal Display Corporation has bought the OLED intellectual property assets of BASF, through its wholly-owned subsidiary UDC Ireland for approximately €87m. “Representing 15 years of research and development, the assets include over 500 issued and pending patents around the world, in 86 patent families,” said UDC. “Largely consisting of phosphorescent materials and technologies, the portfolio has an average lifetime of 10 ...
Texas Instruments revealed a wearable reference design using passive matrix OLED displays, at its stand at the Wearable Technology Show in London this week. Called PMP9792, and not available just yet, very little was being said about it apart from that it combines an OLED display with Bluetooth and is a showcase for the firm’s TPS62770 micro-power dual dc-dc converter chip. ...
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