彩色电视原理英文的文章:
Color television is a technology that allows for the display of images in multiple colors. The principle of color television is based on the combination of three primary colors: red, green, and blue. These colors are mixed in varying proportions to create all the other colors in the spectrum.
The way this works is that the image is broken down into three separate signals, one for each primary color. These signals are then combined and transmitted as a single composite signal. When the signal reaches the television set, it is separated back into its component parts and displayed on the screen.
In order to achieve accurate color reproduction, the television set needs to be able to create a wide range of colors. This is achieved through the use of a color filter, which is placed over the screen. The filter is made up of tiny dots of red, green, and blue phosphors, which emit light when struck by an electron beam.
The electron beam is generated by an electron gun, which is located at the back of the television set. The beam is directed towards the screen by a series of magnetic coils, which control the position of the beam. As the beam strikes the screen, it causes the phosphors to emit light, creating a visible image.
To ensure that the colors are displayed accurately, the television set needs to be calibrated. This is done by adjusting the levels of the red, green, and blue signals, as well as the brightness and contrast of the image. Once the set has been properly calibrated, it should be able to display a wide range of colors with accuracy and clarity.
In conclusion, color television is an incredible technology that has revolutionized the way we view images. By using a combination of red, green, and blue signals, and a color filter made up of phosphors, color television sets are able to display a wide range of colors with accuracy and clarity. With proper calibration, a color television set is capable of delivering stunning visual images that are truly breathtaking.
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