10.Explain the following types of computer monitors and for each case give two disadvantages. 9mks
Liquid Crystal Display
Plasma Display
Cathode Ray Tube
1. Liquid Crystal Display (LCD):
- Disadvantages:
1) Limited viewing angles: LCD monitors tend to have restricted angles from which the display is clearly visible. Viewing the screen from extreme angles may result in distorted colors and reduced image quality.
2) Motion blur: LCD monitors can experience motion blur, especially when displaying fast-moving images or videos. It may lead to a blurry or smudged appearance, which can be distracting for users.
2. Plasma Display:
- Disadvantages:
1) Shorter lifespan: Plasma display panels have a limited lifespan compared to other types of monitors. The phosphors used in plasma screens can degrade over time, resulting in reduced brightness and image quality.
2) Higher power consumption: Plasma displays consume more power than LCD or LED monitors. This high power consumption not only increases electricity bills but also contributes to higher heat dissipation, requiring additional cooling mechanisms.
3. Cathode Ray Tube (CRT):
- Disadvantages:
1) Bulky and heavy: CRT monitors are larger and heavier compared to LCD or plasma displays. Their bulky design takes up more desk space, limiting the working area. Moreover, the weight makes it difficult to move or reposition the monitor.
2) Flickering and eye strain: CRT monitors operate by shooting an electron beam at phosphor dots on the screen, resulting in flickering at a low frequency. Prolonged exposure to this flickering can cause eye strain or headaches in some individuals.
1. Liquid Crystal Display (LCD):
- Disadvantage 1: Limited viewing angles: LCD monitors typically have narrow viewing angles, meaning that the image quality and color accuracy can diminish when viewed from off-center angles. This can make it challenging for multiple people to view the screen simultaneously.
- Disadvantage 2: Potential motion blur: LCDs can sometimes suffer from motion blur, especially when displaying fast-moving content. This can result in reduced clarity and sharpness when watching fast-paced videos or playing high-action games.
2. Plasma Display:
- Disadvantage 1: Screen burn-in: Plasma displays are susceptible to burn-in, which occurs when static images are displayed for extended periods. This can lead to permanent image retention, where outlines of previously displayed content remain visible even when new content is being displayed.
- Disadvantage 2: Higher power consumption: Plasma displays tend to consume more power compared to other types of monitors. This can lead to higher electricity bills and a less energy-efficient display option.
3. Cathode Ray Tube (CRT):
- Disadvantage 1: Bulky and heavy: CRT monitors are significantly bulkier and heavier compared to LCD or plasma displays. Their large CRT housing and glass screen make them less convenient for portability and require more desk space.
- Disadvantage 2: Limited resolutions: CRT monitors often have lower maximum resolutions compared to LCD displays. This means they may not be suitable for high-definition or detailed graphics, making them less suitable for tasks such as video editing or high-resolution gaming.