Posted: Mon, March 23, 2020
As emissive display types such as OLED and microLED emerge into the market place, imaging colorimeters provide the most effective solution for quality inspection, enabling display makers to measure and correct every pixel and sub-pixel.
Posted: Mon, March 9, 2020
Human perception is the ultimate standard for determining the visual quality of a display. However, using human inspection can be problematic because of the statistical variation between observers. Advances in photometric technology and image processing in the last decade have provided an inspection alternative that can match the level of visual acuity of the human eye to detect display defects, but with the speed and consistency of automation. Learn more from our article published in Quality Magazine.
Posted: Mon, March 2, 2020
MicroLED (µLED) displays offer the potential of wider color gamut, higher contrast ratio, and deeper blacks than LCD and OLED displays. To realize the potential of microLED display technology, however, a number of production challenges must be overcome to ensure the quality and uniformity of display devices.
Posted: Mon, December 16, 2019
Everything you every wanted to know about holiday lights—their origin, history, development, popularity, and even their electrical impact. With new LED light strings and other technology developments, we take a look at some of the most spectacular amateur and civic lighting displays around. Enjoy!
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 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, 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, August 26, 2019
To mark the 150th anniversary of the Periodic Table of Elements, originally published in 1869, we explore how chemisty affects the colors we see, chemical properties of colored light, LEDs, and more.
Posted: Mon, July 22, 2019
Today’s device displays rely more and more on small, emissive components like LEDs and OLEDs to provide the high-resolution viewing experience that consumers have come to expect. To do this, displays are being made with smaller pixels resulting in many more pixels per square inch. To measure these increasingly tiny pixels and emitters—which in miniLED and microLED screens can be microscopic—Radiant's Microscope Lens provides the precision and high-resolution needed.
Posted: Mon, July 15, 2019
The invention of Blue LEDs in the 1990s was a significant scientific and technological breakthrough that enabled the development of the phosphor-coated white LEDs that are used many of today's display and lighting products. However, there are also concerns about human exposure to blue wavelengths of electromagnetic radiation. While blue light has been shown to disrupt sleep patterns, are there other health risks?