1. OLED working principle.
A Layer of organic material is sandwiched between two conductors (an anode and a cathode), which in turn are sandwiched between a glass top plate (seal) and a glass bottom plate (substrate). When electric Current is applied to the two conductors, a bright, electro-luminescent light is produced directly from the organic material.
2. How is color created ?
OLED has more control over color expression because it only expresses pure colors when an electric Current stimulates the relevant Pixels. The OLED primary color matrix is arranged in red, green, and blue Pixels, which are mounted directly to a printed circuit board. Each individual OLED element is housed in a special “micro-cavity” structure designed to greatly reduce ambient light interference that also works to improve overall color Contrast.
The thickness of the organic Layer is adjusted to produce the strongest light for each of the colors ” red, green and blue – used to render the color picture. The three colors are further refined by a color filter, which purifies each color without the need for a polarizer, rendering outstanding color purity.