Why does OLED lighting feel so comfortable?

The Biology of Light
When light reaches the eye, it first passes through cells unrelated to photoreception, then reaches the photoreceptor cells at the back of the eye, and then travels backwards to the optic nerve. As a result, there are no photoreceptors at the location of the optic nerve, creating a blind spot with no visual information. Since humans have two eyes and the brain has a great capacity for information processing, these blind spots were eliminated later in the processing of visual information.
Stem cells are widely distributed in the retina and are mainly used to form dark vision. They can only recognise black and white images. Rod cells are highly sensitive and can be activated by one or two photons. After light enters the rod cells, optic proteins regulate the potential by changing ion channels in the cell wall, and the potential is transmitted to the brain to form vision.

Cone cells in the central concavity are responsible for the fine depiction of light for vision. There are three types of cone cells in the central recess of the retina, the S-type, which is sensitive to blue light (short wavelengths), the M-type, which is sensitive to green light (medium wavelengths), and the L-type, which is sensitive to red light (long wavelengths). The light signals perceived by the visual cone cells are transmitted to the ganglion cells via bipolar cells, converted into current signals and transmitted to the brain.

We receive a large amount of visual information data every day. The amount of data that passes through the human eye is about 140.34gb per minute, which means that 8tb of data is transmitted to the brain in an hour. Roughly speaking, the brain consumes one-third of the total energy expenditure of the human body, while the visual system consumes 46 per cent of the total energy of the brain. In other words, one-sixth of the energy you consume each day is supplied to the visual system. The visual system plays an integral role in any living thing, but it is a very expensive organ.

We expend so much energy on the visual process every day that it is vital to perceive and transmit light efficiently.

Benefits of OLED light for our health
No UV
UV and visible light in the short-wave blue range are extremely energetic and damaging to organic macromolecules. Skin cancer in humans is mainly caused by excessive UV rays from sunlight. This is why the weather forecast also describes the UV index and sunscreen recommendations.

If eye protection is not in place, UV rays can travel from the outside of the eye to the inside, causing damage to the cornea, pupil, crystals, and retina. According to research data, there are approximately 24 million cataract patients in the United States alone, and many of these cases are caused by UV exposure. Traditional fluorescent and blue LED lights are excited by UV light, causing excessive UV and high-intensity blue light, which can be hazardous to health in long-term use.

OLED lighting is certified (IEC 62471) to pose no photochemical UV risk to the skin or cornea.

Low yellow-orange spectrum
Due to the presence of photosensitive proteins, M- and L-type photoreceptors respond to the yellow-orange spectrum. The yellow-orange spectrum has the most "receptors". M- and L-type cells in the green and red spectrums in the optic cones can perceive yellow-orange light very well.

During this process, most of the depletion receptors are switched on - except for the blue-sensitive S-type cone cells (the smallest proportion). However, most of the output channels are in a blocked or inefficient state - they sense the light, but the information cannot be transmitted, leading to increased amino acid and ion depletion.