Page 177 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

• Multiple circuit boards are present, including the main logic board, input/output boards, and other specialized
boards for specific functions.
9 Connectivity Ports
• LED TVs are equipped with various ports for connecting external devices. Common ports include HDMI, USB,
audio jacks, and network ports.
10 Smart TV Features
• Modern LED TVs often come with Smart TV capabilities, including an operating system, user interface, and
internet connectivity. These features allow users to access streaming services, apps, and other online content.
11 Remote Control and User Interface
• Users interact with the TV through a remote control or, in the case of Smart TVs, through various input methods
like voice commands, gestures, or smartphone apps.
Advantage and Disadvantage of LED TV
Advantages of LED TVs
1 Energy Efficiency: LED TVs are generally more energy-efficient compared to older technologies like CRT
(cathode ray tube) and even some LCD TVs. This can result in lower electricity bills and reduced environmental
impact.

2 Slim and Lightweight Design: LED TVs are known for their slim and lightweight design, making them
aesthetically pleasing and easy to mount on walls. This is especially true for edge-lit LED TVs.
3 Improved Picture Quality: LED backlighting allows for better control of brightness and contrast, leading to
improved picture quality with higher colour accuracy and dynamic range compared to older technologies.
4 Longer Lifespan: LED technology tends to have a longer lifespan compared to traditional backlighting
methods, contributing to the overall durability and longevity of LED TVs.
5 Faster Response Time: LED TVs typically have faster response times compared to older technologies,
reducing motion blur and making them suitable for fast-paced content like sports and action movies.
6 Flexibility in Screen Size: LED TVs are available in a wide range of screen sizes, from small to very large,
providing consumers with flexibility to choose a size that fits their preferences and viewing environment.

7 Smart TV Features: Many LED TVs come equipped with Smart TV features, including internet connectivity,
streaming apps, and the ability to browse the web. This enhances the overall entertainment experience.
Disadvantages of LED TVs

1 Cost: LED TVs can be more expensive than some other types of TVs, particularly when compared to basic
LCD or CRT models. However, prices have become more competitive over time.
2 Limited Viewing Angles: In some cases, LED TVs may exhibit limited viewing angles, where the picture
quality diminishes when viewed from the side. This is more noticeable in certain types of LED TVs, like those
with twisted nematic (TN) panels.
3 Uniformity Issues: LED TVs, especially edge-lit models, may experience issues with uniformity, where the
backlighting is not evenly distributed across the screen. This can result in uneven brightness or “clouding” in
certain areas.
4 Risk of Image Retention (LCD): In LCD-based LED TVs, there may be a risk of image retention or “ghosting”
in certain situations, where static images displayed for extended periods can leave a temporary residue on the
screen.
5 Limited Colour Range (some models): While LED technology itself supports a wide colour range, the colour
reproduction can vary between different models. Some lower-end LED TVs may have a more limited colour
gamut compared to high-end models or OLED TVs.
6 Environmental Impact: While LED TVs are generally more energy- efficient during use, the manufacturing
process involves the use of materials that can have environmental consequences. Proper disposal and
recycling of electronic waste are crucial to mitigate these impacts.

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CITS : E & H - Electronics Mechanic - Lesson 100 - 107