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?
Posted: Mon, July 8, 2019
The word moiré describes an interference pattern—a form of aliasing—that can appear on images. When using imaging devices to inspect displays, it's usually necessary to remove the moiré pattern as one of the pre-processing steps. A common method is simply to defocus the image. While this removes moiré patterns, it sacrifices image clarity, and is not a good solution for inspecting pixel-dense and emissive displays like OLED and microLED. Learn about Radiant's moiré removal approach that preserves image focus and resolution.
Posted: Mon, February 4, 2019
Near-infrared light—the range of electromagnetic wavelengths between roughly 700 nanometers (nm) and 1500 nm—is invisible to the human eye, making it ideal for an increasing number of 3D sensing applications such as facial recognition, iris scanning, gesture recognition, terrain mapping, automobile LiDAR, and night-vision security cameras. Learn more about NIR facial recognition quality and performance considerations, and how Radiant's new NIR measurement solution can help you ensure NIR light sources are perfoming to spec.
Posted: Mon, January 7, 2019
Head-up displays (HUDs) pose unique measurement challenges for manufacturers, combining photometric (light) and dimensional (spatial) data to ensure the accuracy of information conveyed to a vehicle operator within a rapidly changing, real-world environment. Radiant introduces a new module of our TrueTest™ software that provides a complete HUD measurement solution.
Posted: Mon, December 3, 2018
Head-up display (HUD) systems in automobiles offer safety and design advantages, by projecting speed, navigation, and situational alerts onto the car's windshield directly in the driver's field of view. Two-dimensional, fixed-distnace displays are starting to come on the market; but the next generation of 3D and augmented reality displays are already set to overtake them. How does the process of HUD measurement change with the incorporation of 3D and AR-HUD systems, which project new types of virtual images, across larger fields of view, and at a range of depths?