What is Blue Light?

Light can be divided into visible light and invisible light. The part that can be perceived by the human eye is called visible light, and comprises wavelength from 400 nm to 700 nm. The colors we usually see, for example, red, orange, yellow, green, turquoise, blue, and violet, all belong to the visible light spectrum. Light having a wavelength longer than 700 nm is called infrared light, and wavelength shorter than 400 nm is called ultraviolet light (UV).

Figure 1: Light spectrum showing high-energy visible light

Recent studies have shown that UV light may damage biological tissues, including skin and eyes. People now understand that using sun block products can prevent skin damage. While it is highly unlikely for humans to stare directly at sun light (UV) or infrared light under normal circumstances, chances for infrared light and ultraviolet light damage to eyes are generally quite slim. However, visible blue light is allowed to enter the retina. We can separate visible blue light into two groups - short wavelength blue light (420 nm to 455 nm) and long wavelength blue light (455 nm to 480 nm).

Effects of Blue Light

1. Short wavelength blue light may cause vision problems

Studies have shown that short wavelength blue light from 420 to 455nm (near ultraviolet range), is considered a potential hazard to the retina and can lead to vision-related problems such as eyestrain and blurred vision. Long-term exposure may contribute to eye-related diseases such as macular disease (AMD) and cataracts.

2. Long wavelength blue light can boost attention, and reaction efficiency

Studies have proven that long wavelength blue light (455-480nm) is beneficial to humans during daytime hours because it can boost attention, shorten reaction times, and positively affect the mood control centers of the brain.

BenQ Low Blue Light Plus

The LED screens currently on the market use WLED (White LED) backlighting. The working principle of WLED is to use emissions from a blue chip to excite yellow phosphor on chip to produce white light. However, emissions from the blue chip become short wavelength blue light and may cause vision problems after prolonged usage.

BenQ Low Blue Light Plus technology utilizes a specially designed blue chip to avoid short wavelength blue light (420 nm ~ 455 nm) emission while retaining the long wavelength blue light (455 nm ~ 480 nm), allowing users to experience the ultimate color reproduction with undistorted colors, high sharpness, and contrast. In the meanwhile, preventing potential vision problems and providing ultimate image quality.

Strictly necessary cookies

Functional cookies

Performance cookies and advertising cookies

What is Low Blue Light Plus Technology?

What is Blue Light?

Effects of Blue Light

BenQ Low Blue Light Plus