Since most of the light emitted by the light source is collectively referred to as white light, the color table temperature or the correlated color temperature of the light source is used to refer to the relative whiteness of the light color to quantify the light color performance of the light source. According to MaxPlanck's theory, a standard black body with complete absorption and radiation capability is heated, and the temperature gradually increases. The black body curve (Blackbodylocus) on the CIE color scale shows that the black body is red-orange-yellow-yellow- - Yellow white - white - blue and white process. The temperature at which the black body is warmed to the same or close to the light source is defined as the correlated color temperature of the light source, which is called the absolute temperature K (Kelvin or Kelvin) (K=°C+273.15). Therefore, when the black body is heated to a red color, the temperature is about 527 ° C, that is, 800 K, and other temperatures affect the color change.
The color temperature of the light source is different, and the light color is different:
The color temperature is below 3300K, the light color is reddish to give a warm feeling; there is a steady atmosphere and a warm feeling;
The color temperature is in the middle of 3000--6000K. There is no obvious visual psychological effect in this color tone, and there is a refreshing feeling; so it is called "neutral" color temperature;
The color temperature is over 6000K, and the light color is blue, giving people a feeling of coldness.
a. Color temperature and brightness High color temperature light source, if the brightness is not high, it gives people a kind of yin atmosphere; under low color temperature light source, the brightness is too high will give people a stuffy feeling.
b. Comparison of light and color In the same space, two kinds of light sources with large color difference are used, and the contrast will have a layer effect. When the light color contrast is large, the level of light color can be obtained while obtaining the brightness level.
Irradiation with a low color temperature source makes the red color vivid;
Irradiation with a medium color temperature source to make the blue have a cool feeling;
Irradiation with a high color temperature source gives the object a cold feel.
Color temperature is the human eye's perception of illuminants or white reflectors. This is physics. A sense of the complex and complex factors of physical science and psychology varies from person to person. The color temperature can be changed in a human way on a TV (illuminator) or photography (reflector). For example, we use a 3200K incandescent heat lamp (3200K) for photography, but we add a red filter to the lens. Filtering through a little red light makes the photo look a little cooler; on the same reason, we can also reduce a bit of red on the TV (but reducing too much will also affect the normal red performance) to make the picture look a bit warmer.
The preference for color temperature is determined by people. This is related to the daily scenery we see. For example, in the people close to the equator, the average color temperature seen every day is 11000K (8000K (dusk) ~ 17000K (noon)). So I prefer high color temperature (it seems more realistic). On the contrary, people with higher latitudes (average color temperature of about 6000K) prefer low color temperature (5600K or 6500K), which means if you use a high The color temperature TV to show the scenery of the Arctic, it seems to be partial green; on the contrary, if you use a low color temperature TV to see the subtropical style, you will feel a bit reddish.
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