Anatomy of a Laptop LCD Screen

By Administrator at July 15, 2010 15:24
Filed Under: Laptop LCD Screen
Before LCD screens became popular for desktop use, laptop LCD panels were the first introduction to LCD technology. Today, it is quickly becoming the technology of choice for laptops, desktops, and even high-definition televisions, but how do LCD screens work? Let us take a look at the anatomy of a laptop LCD screen.

The basis of LCD (liquid crystal display) technology is liquid crystals. The liquid crystals are what provide the color for the display by filtering light. It is a common misconception that the liquid crystals themselves glow or provide light, but this is not the case. The liquid crystals merely filter the light into one of three colors: red, green, and blue. This is why the term RGB display is often used. Liquid crystals respond to electrical current, which is how they switch colors so rapidly.

Most consumers are familiar with the term "pixel". Pixels are the individual "dots" of the display that when combined form the entire image. Each pixel contains a red, green, and blue liquid crystal that can be activated very quickly. The combination provides the image of the display.

The backlight is what provides the light source that the liquid crystals filter. The most common type of backlight uses a fluorescent bulb to light the display from the side or the bottom of the display. In recent years, manufacturers have begun to use LED (light-emitting diode) technology as a backlighting source. LEDs use less power and often provide a smoother backlight that makes a display more even.

The other layers of a laptop LCD screen include a mirror to reflect the light evenly, a glass filter, a few polarizing films, and a positive electrode. Each piece works together to form a clear, bright image for the viewer.

Replacing a broken LCD screen can be an involved process and it is necessary to find the correct screen. Many on-line retailers carry both OEM and factory direct replacements and have tools to help you find the correct screen.

Although LCD technology is not new, it is constantly improving and evolving. As LCDs have been integrated into smartphones and other devices, the need for better implementations are always driving engineers to improve and provide even better clarity at low costs.