Page 175 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

MODULE 11 : LCD TV / LED TV / Smart TV

LESSON 100 - 107 : LCD TV / LED TV / Smart TV

Objectives

At the end of this lesson you shall be able to:
• state the differences between CTV,LCD, LED & smart TV
• state the principle & working of different types of TV
• state the principle & working of TV remote.

LED TV

Introduction
LED TV, or Light Emitting Diode Television, represents a significant advancement in display technology that has
revolutionized the way we experience television and multimedia content. Unlike traditional cathode ray tube
(CRT) or older LCD (Liquid Crystal Display) TVs, LED TVs employ light- emitting diodes to illuminate the display,
resulting in a sleeker design, improved energy efficiency, and enhanced picture quality.
The key feature of LED TVs lies in the use of LEDs for backlighting. There are two main types of LED backlighting:
edge-lit and direct-lit. In edge-lit LED TVs, the LEDs are placed along the edges of the display, allowing for a
thinner and lighter design. Direct-lit LED TVs, on the other hand, have LEDs spread across the entire back panel,
providing better control over local dimming and improving overall picture quality.
LED TVs offer several advantages over their predecessors. One notable benefit is the improved colour accuracy
and contrast ratio, leading to sharper and more vibrant images. The use of LED technology also enables these
TVs to achieve higher levels of brightness, enhancing visibility even in well-lit environments.
Energy efficiency is another significant advantage of LED TVs. Compared to traditional CRTs and LCDs, LED TVs
consume less power, contributing to lower energy bills and reduced environmental impact. Additionally, LED TVs
are known for their longer lifespan and durability, providing users with a reliable and long-lasting entertainment
solution.
The evolution of LED TV technology has also given rise to innovations such as Smart TVs. These televisions are
equipped with internet connectivity, allowing users to access streaming services, browse the web, and download
applications directly on their TV screens.
Construction and working process of LED TV
The construction and working process of an LED TV involves several key components and layers that work
together to produce images and deliver audio. Here’s a general overview of the construction of an LED TV

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