How to choose primary color's wavelength of LED?
In 1666, the famous British scientist Newton found that the color of the light is determined by the wavelength of the light. As a visual media and in essential, the led display is to show different colors. With the mixture of the primary colors, the led displays are trying to show all the colors of the great nature. So to research the primary color's wavelength of LED, is to research the core technology of led display.
Some the choice of the led primary color's wavelength is to achieve the good visual effect. For example the green LED. At the very beginning, the 570nm yellow green LED was widely adopted. The cost was low, but the color gamut was small, the brightness was low, and the color revivification was bad. But replacing the 570nm yellow green LED with 525nm pure yellow LED, the color gamut increased 2 times, and the color revivification improved greatly, so the visual effect of led display is much better.
Some the choice of the led primary color's wavelength is to respect the people's habit. For example of the stock market led display, people are used to see the red color as stock going up, the green color as stock going down, the yellow color as no change (but certainly it's just the habit of China, some other areas may different).
Also, some the choice of the led primary color's wavelength is based on industry standards. For example of the traffic led displays, it is strictly ruled that the blue and green color indicates pass, and the red color indicates forbid.
So we need to consider all the possible factors to choose the color, to choose the wavelength of the LED for led displays.
Some the choice of the led primary color's wavelength is to achieve the good visual effect. For example the green LED. At the very beginning, the 570nm yellow green LED was widely adopted. The cost was low, but the color gamut was small, the brightness was low, and the color revivification was bad. But replacing the 570nm yellow green LED with 525nm pure yellow LED, the color gamut increased 2 times, and the color revivification improved greatly, so the visual effect of led display is much better.
Some the choice of the led primary color's wavelength is to respect the people's habit. For example of the stock market led display, people are used to see the red color as stock going up, the green color as stock going down, the yellow color as no change (but certainly it's just the habit of China, some other areas may different).
Also, some the choice of the led primary color's wavelength is based on industry standards. For example of the traffic led displays, it is strictly ruled that the blue and green color indicates pass, and the red color indicates forbid.
So we need to consider all the possible factors to choose the color, to choose the wavelength of the LED for led displays.
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