AMLCD is a high-quality digital display technology used in advanced electronics. It uses thin film transistors to generate images and has a higher refresh rate than passive matrix LCDs, resulting in clearer images with better contrast.
An active matrix liquid crystal display (AMLCD) is a digital display technology often used in electronic devices such as cell phones and laptop computers. AMLCD and passive matrix are the two types of liquid crystal display (LCD). Active matrix designs are typically higher quality than passive ones, which is why they are used in more advanced electronics.
A basic passive matrix LCD, like the face of a digital clock or alarm clock, has a variety of conductive segments each connected to a separate circuit, usually located in front of a backlight. Each of the intersections constitutes a single pixel. To display different images, different combinations of these circuits are activated simultaneously. As current passes through a particular column and row, the liquid crystal, which is normally twisted to dull the backlight, unfolds to let the light through.
Early laptops used this technology, but suffered from low resolution and poor overall quality. The nature of passive matrix technology lends imprecision to the twisting and unwinding of individual pixels in a dense matrix. This leads to a generally blurry quality of passive matrix displays because the pixels surrounding the pixel intended to be illuminated often become partially uncoiled, allowing light to pass through.
An active matrix liquid crystal display is much more complex and uses many small transistors and capacitors known as thin film transistors (TFTs) to generate images. TFTs are arranged in a large grid, or matrix, which makes up the entire screen. Each intersection similarly represents a single pixel, but the flux of light on adjacent pixels is greatly reduced.
A pixel on an active matrix liquid crystal display is activated by turning on a particular column and sending an electric current through a particular row. While a charge remains in its capacitor, a TFT remains open to allow the backlight to shine through. The speed at which the active matrix can reset and redisplay a new charge is known as its refresh rate, and higher speeds allow for clearer representation of fast video sequences and minimize an effect known as ghosting. The lowest refresh rates on an active matrix LCD are still many times faster than the best passive matrix LCD.
Thanks to the use of capacitors, TFT pixels are only able to unravel partially. This means they can display a large degree of hue for any given color. Unlike passive pixels, an active matrix liquid crystal display can offer much smoother images with far better contrast.
Protect your devices with Threat Protection by NordVPN
