Answer :
Final answer:
The arrangement where LEDs are placed around the perimeter of the screen and use a diffuser to evenly distribute light is called Edge-lit. This is distinct from other methods such as Direct-lit, Backlit, or Side-lit, and it allows for slim TV profiles. LEDs emit light when electrical excitation occurs, and liquid crystals in pixels help control light passing through the screen to create images. option b is correct answer.
Explanation:
In flat screen LCD televisions, there is a large light at the back of the TV which illuminates the screen. The light passes through millions of tiny units called pixels (picture elements). Each pixel contains three cells with red, blue, or green filters, and the voltage applied to each liquid crystal in these cells determines how much light is passed through, affecting the image contrast and color. When referring to how these LEDs are arranged around the screen, the correct term is Edge-lit. In Edge-lit LCDs, LEDs are placed around the perimeter of the screen and a diffuser is used to distribute the light evenly across the screen.
Edge-lit LCDs are different from Direct-lit or Backlit TVs, where the LEDs are arranged behind the screen, and from Side-lit where LEDs are specifically on the sides. The use of LED technology, which stands for 'light-emitting diode', provides a slim profile due to the arrangement of lights along the edge and the use of a diffuser to create even lighting on the display. Liquid crystals in the display use polarized light and can be manipulated by applying a voltage to create dark or light regions on the screen, which forms the visual images we see.
