What is called a LED point light source and a backlight? Say it in a casual way
Generally, LED is the use of luminescent properties of two tubes, injected current, electron and hole continuously flows through the PN or similar structure, and spontaneous diode of semiconductor device radiation light composite.A point light source is a light source made up of a small point, emitting light energy outward.Then the LED electric light source is a small source of light made up of LED.Back light, is a special term display industry, is the LCD light source is arranged in the display back, should be like this liquid crystal material itself does not take the initiative to light, so the light modulation is carried out through the back light.
Backlight refers to the field of LCD tv. Liquid crystal itself does not emit light, to make LCD TV to send color screen light, it is necessary to add a uniform flat light source in the back of the LCD, that light source is the backlight.
Point lights are used for outdoor lighting. You should have seen the buildings in the downtown area at night. Some of them are lit by one light point, and the brightness and color of the whole are changed. That is the point light source.
