Which is better between lcd and led

There are many factors to consider, but the process often begins with one major question: What kind of TV should you get? These panels are typically composed of two sheets of polarizing material with a liquid crystal solution between them. Think of it as a shutter, either allowing light to pass through or blocking it out.

Each of these illumination technologies is different from one another in important ways. CCFL backlighting is an older, now-abandoned form of display technology in which a series of cold cathode lamps sit across the inside of the TV behind the LCD. The lights illuminate the crystals fairly evenly, which means all regions of the picture will have similar brightness levels.

This affects some aspects of picture quality, which we discuss in more detail below. Full-array backlighting swaps the outdated CCFLs for an array of LEDs spanning the back of the screen, comprising zones of LEDs that can be lit or dimmed in a process called local dimming. While there are some drawbacks to edge lighting compared to full-array or direct backlight displays, the upshot is edge lighting that allows manufacturers to make thinner TVs that cost less to manufacture.

To better close the local-dimming quality gap between edge-lit TVs and full-array back-lit TVs, manufacturers like Sony and Samsung developed their own advanced edge lighting forms. These keep the slim form factor achievable through edge-lit design and local dimming quality more on par with full-array backlighting.

This is accomplished by selectively dimming the LEDs when that particular part of the picture — or region — is intended to be dark. By: HowStuffWorks. The basic technology is the same in that both television types have two layers of polarized glass through which the liquid crystals both block and pass light.

LED TVs provide a better picture for two basic reasons. Second, light emitting diodes can be dimmed. The dimming capability on the back lighting in an LED TV allows the picture to display with a truer black by darkening the lights and blocking more light from passing through the panel. Sign up for our Newsletter! Mobile Newsletter banner close.

Mobile Newsletter chat close. The LCD has liquid crystal filament which is filled between the transparent electrodes. When the current passes between the electrodes, the filaments become energised and emits visible light. The construction of liquid crystal display is shown in the figure below. The liquid crystal used in the display has the property of both the solid and the liquid. When the potential is not applied across the liquid crystal, it becomes transparent but after activation, the crystal scatters light in all directions and appears to be bright.

The LCD consumes less power and also have seven segment displays. But it is a slow device and requires more times for switching. The dc reduces their lifespan and hence mostly they are used with AC having a frequency less than Hz.

Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Whereas the LCD uses liquid filaments which are filled between glass electrodes for the emission of light.