Eyesafe® Standards for Blue Light Management and Color Performance for Display and Accessory Products
Blue Light & Color Standards
Visible light spans the electromagnetic spectrum between 380 and 780 nanometers (nm). Within the light spectrum, blue light, which is also referred to as high-energy visible (HEV) light, corresponds to wavelengths between 380 and 500nm. To date, there are no published standards on the cumulative effects of HEV blue light exposure, but significant research and scientific papers have been generated on the impact that HEV blue light has on the eyes.
Eyesafe® Display Requirements
The Eyesafe Display Requirements 2.0 are intended primarily for electronic products with displays that typically emit visible radiation in the range of 380 to 780 nm. The Requirements focus on limiting blue light emissions to address the growing body of research suggesting potential risks of blue light exposure. The Eyesafe Display Requirements address the industry’s need for accurate color quality and have been broadly adopted by leading OEMs and panel manufacturers.
The Eyesafe Display Requirements for blue light emissions and color performance align with international standards and guidelines developed by the American National Standards Institute (ANSI) and the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The Requirements quantify blue light emission levels to human eyes using the aforementioned standards’ spectral weighting function B(λ) for retinal Blue Light Hazard and overseeing all-optical hazards in the visible spectral range.
Eyesafe Display Requirements focus on the HEV light that is emitted by digital devices and rely on two updated standards from the American National Standards Institute (ANSI) to guide our product development: Z80.3-2018 and Z87.1-2020, which identify the blue light hazard wavelengths range and its hazard maximum at 435nm to 440 nm, and include data for computing blue light transmittance. If you would like to review these standards in full, you can purchase and download them here.
In the new Eyesafe® Display Requirements 2.0, Eyesafe is introducing RPF® for Display. This simple metric provides a rating system to help the end-user identify and compare devices and their respective blue light emissions at a specific brightness level (200 nits). RPF is calculated using a scaling factor that is based on the current technological limits of recent LCD and OLED technologies. The goal is to provide the end-user with a number (1-100) that reflects the blue light toxicity of the display, effectively simplifying the complex blue light toxicity formula used for measurement. Similar to how Sun Protection Factor (SPF) measures protection for the skin, the Radiance Protection Factor (RPF) scale measures blue light emissions and potential risk for the eyes. The higher the number, the better — in essence, higher RPF numbers indicate a greater reduction of high-energy blue light in a display.
Color management and user experience
At Eyesafe, we are very cognizant of the impact that blue light filtering has on color transmission. In fact, it is a primary goal of all Eyesafe® technologies to selectively filter blue light while maintaining crisp and vivid color transmission in digital displays.
The CIE (International Commission on Illumination) 1931 color spaces were the first to define quantitative links between physical pure colors (i.e. wavelengths) in the electromagnetic visible spectrum, and the physiological perceived colors in human color vision. The mathematical relationships that define these color spaces are essential tools for color management when dealing with color inks, illuminated displays, and recording devices such as digital cameras. Many digital devices, whether they are phones, tablets or monitors, strive to create an illumination rating known as D65. The CIE positions D65 as the standard daylight illuminant, as it is intended to represent average daylight. As we filter blue light from display emissions, we also strive to minimally impact D65 illumination ratings.
Eyesafe® Accessory Requirements
This certification measures the level of blue light reduction based on the spectral weighting factors for blue-light hazard as published by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) in 2013 and adopted by the American National Standard Institute (ANSI) in 2015 (and successive updates). The purpose of this certification is to show to the end user that the product design provides the partial reduction (not complete avoidance) of blue light exposure in a certain wavelength range and in the meanwhile ensures good display quality, including color range and CCT.
This standard defines test method and factors for blue light reducing film which is intended to be used with electronic display devices to reduce the hazard which might arise from blue light exposure.
Certified by TÜV Rheinland, global leader in independent third-party certification
Standard testing procedures are necessary to accurately compare the performances of displays in terms of blue light reduction and color integrity. Displays are tested by TÜV Rheinland, a global leader in independent third-party certification. TÜV Rheinland is widely respected and touted for it’s independent evaluation, testing and assessment services. Third-party certification provides end-users with the confidence that a display has been independently verified to meet the Eyesafe® Display Requirements.
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