Samsung and Stanford University have collaborated to manufacture OLED displays with a resolution of up to 10,000 pixels per inch (ppi). This study shows that this may lead to the development of virtual reality and augmented reality technology, because high pixel density can generate more realistic images. This result can be achieved by extending the existing ultra-thin solar panel electrode design. Compared to recent developments, the pixel density of smartphone displays is much smaller-displays with the highest pixel density are usually around 400ppi to 500ppi.
Displays with high pixel density will be able to provide realistic details. According to research by Samsung and Stanford University, in addition to high pixel density, the new OLED display will be brighter and have better color accuracy than existing OLED displays. It will also be easier and more cost-effective to produce.
Given that most VR devices have the effect of shielding the screen-the thin lines separating the pixels become visible, this development may be beneficial to devices such as virtual reality headsets.
The key innovation behind the new OLED is a reflective metal base layer with nano-scale ripples, called an optical metasurface. The study explained that metasurfaces can manipulate the reflective properties of light and allow different colors to resonate in pixels.
Research by Samsung and Stanford University aims to provide alternatives to the two types of OLED displays currently on the market. According to research, the first one is called red, green and blue OLED, which has separate sub-pixels and contains only one color emitter. These can only be produced in small batches and used in smartphones. At the same time, white OLED displays are used by large equipment such as televisions.
Researchers successfully produced miniature proof-of-concept pixels in laboratory tests. Compared with color-filtered white OLEDs, the study found that these pixels have higher color purity, and compared with how much energy is used, the luminous efficiency has been doubled, which helps to measure the brightness of the screen. This also allows an ultra-high pixel density of 10,000ppi.
According to the study, Samsung is studying how to integrate development results into full-size displays.
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