Posted: Mon, December 9, 2019
To compete with the superior contrast ratio performance of OLED display screens, LCD makers have developed the technique of local dimming, which allows different regions of a backlight to be controlled independently. The introduction of miniLEDs for LCD backlights, especially in full-array configuration, is boosting the performance of LCD televisions and display screens.
Posted: Mon, December 2, 2019
The ultimate measure of display's performance is how it appears to a human viewer. While all of the typical electronic display metrics—ppi, refresh rate, luminance, pixel pitch, etc.—are informative, being able to measure and grade display defects using the Just Noticeable Difference (JND) method is key for display manufacturers to ensure quality.
Posted: Mon, November 25, 2019
MicroLED displays offer superior performance for brightness, contrast, and energy efficiency compared to OLED or other existing display types, but so far production challenges have held them back from mass commercialization. Manufacturers are rapidly closing the gap, however, and microLED display products could be coming to the general consumer market soon. We look at microLED technology and ways to overcome quality challenges.
Posted: Mon, November 18, 2019
Curved display form factors are enabling automotive designers to get creative with display integrations to serve multiple functions in the vehicle. Quality testing these curved displays demands new approaches beyond traditional flat-panel displays. Radiant engeineers conducted a study of methods for measuring small defects in curved displays.
Posted: Mon, November 11, 2019
The concept of metamaterials has been around for a while, but in the last two years we've seen a surge in scientific and fabrication breakthroughs that could soon usher in a new age of optical techniques and capabilities based on metalenses: tiny, flat lenses that can manipulate wavelengths of light.
Posted: Mon, November 4, 2019
The development of medical imaging technologies—such as X-ray, MRI, CT, ultrasound, and PET—has revolutionized healthcare. To view images accurately, display screens used by radiologists, surgeons, and other clinicians must provide higher performance than commercial-grade screens. Learn about medical-grade display requirement and quality assurance solutions.
Posted: Tue, October 22, 2019
Ever since Princess Leia's holographic emergence in 1977, developers have been trying to create 3D volumetric holograms like those in Star Wars and other science fiction movies. Many of what we call "holograms" today appear three-dimensional, but are actually just images projected onto a flat screen—technically still 2D. But new developments are making 3D holograms that you can view from every angle a reality.
Posted: Mon, October 21, 2019
The invention of the electric light bulb changed the world, enabling human activity to continue 24 hours a day in all ambient conditions. Today, the lighting design industry is adopting Human Centered Lighting approaches, and considering ergonomics, health and safety, aesthetics, and more. For lighting designers, measuring luminance and color temperature are key to meeting the needs of any environment to optimize human productivity and well being. Learn about tools to capture photometric data and generate IES and EULUMDAT (LDT) files for use with most optical design software packages.
Posted: Mon, October 14, 2019
As the display industry is increasing the pixel density of display screens, there is a growing need for precise, high-resolution measurement methods to ensure quality of these displays. Modern imaging systems need to have more measurement pixels (sensor pixels) to increase resolution and capture enough detail to detect defects. Sensor resolution alone isn't all that matters, however, pixel size (well depth) and image noise are just as important for accurate display metrology.
Posted: Mon, October 7, 2019
Gestures are a natural and intuitive part of human communication and expression. Thus, being able to use gestures to communicate with devices in our environment has been a goal for technology developers for decades, but it's a complex process. The latest generation of gesture sensing systems include applications in the automotive, medical and consumer spheres, often using three-dimensional / depth sensing based on near-infrared (NIR) light.