Every LED person must understand the basic knowledge of LED color temperature

Light varies in nature, and the perceived color of an object depends on the source of light shining on it. The human brain can “correct” for these color changes pretty well, but the film or CCD/CMOS sensors we use can’t do the job.

If an object burns, first the flame is red, then it becomes orange-yellow as the temperature increases, then white, and finally, blue appears.

Scottish mathematician and physicist Lord Kelvin first discovered the close relationship between heat and colour in 1848 and gave the world the great concept of “absolute zero” (-273.15 degrees Celsius). Hence the Creation of the Kelvin Temperature Scale. This is the theoretical basis for our discussion of color temperature today.

The Kelvin scale shows temperature in units K (short for Kelvin). Using flames as an example, the lower the number, the redder, and the higher the number, the bluer. Red and blue are not the colors of the light itself, but simply indicate that there is more red or blue in the spectrum.

Here’s a look at common criteria on the Kelvin scale: “Absolute zero” is expressed as 0 K on the Kelvin scale, which corresponds to -273.15 degrees Celsius (or -459 degrees Fahrenheit), the temperature at which the thermal activity of a substance stops completely.

The bluer the light color, the higher the color temperature; The redder the light color, the lower the color temperature. The color of light varies with the color temperature of light source. Color temperature in 3300K below a stable atmosphere, warm feeling; Color temperature in 3000-5000K for the middle color temperature, there is a refreshing feeling; The color temperature above 5000K has a cold feeling. Different light colors of different light sources constitute the best environment.

Color temperature preferences vary from person to person, which is related to the scenery we see daily. For example, in regions near the equator, the average color temperature people see on a daily basis is between 11000K(8000K(dusk) and 17000K(noon)), so they prefer high color temperatures (which look realistic). Conversely, people in higher latitudes (average color temperature around 6000K) prefer lower color temperatures (5600K or 6500K), which means that if you use a high color temperature TV to show the Arctic landscape, it will look bluer; On the contrary, if you use a low color temperature TV to watch the subtropical style, you will feel a little red.

What is the color temperature of a TV or display screen? Since the average color temperature of Scenery in China is between 8000K and 9500K all year round, the production of TV programs is based on the audience’s color temperature of 9300K to photograph. However, the average color temperature in Europe and the United States is different from ours. The average color temperature in the four seasons is about 6000K, so when we watch those foreign movies, we will find that 5600K ~ 6500K is the most suitable for watching.

Black-eyed people see 9300K as white, but blue-eyed people see it as bluish. At 6500K, people with blue eyes saw white, while those with black eyes saw yellowish.

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