What Do You Know About The LCD Display?
Who doesn't know about the LCD display nowadays? It is known as the technology used for displays on gadgets such as notebooks. It technically allows displays to be thinner than the formally used cathode ray tube. But how much do you truly know about LCDs? Take our small quiz and find out.
- 1.
What's an example of an application that uses LCD?
- A.
Lenses
- B.
Mirrors
- C.
Electrical torches
- D.
Computer monitors
Correct Answer
D. Computer monitorsExplanation
Computer monitors are an example of an application that uses LCD (Liquid Crystal Display) technology. LCD screens are commonly used in computer monitors due to their slim design, low power consumption, and ability to display high-quality images and videos. LCD technology works by manipulating the light passing through liquid crystal cells, which allows for the creation of pixels and the display of various colors. This makes LCD screens ideal for computer monitors, where visual clarity and color accuracy are important.Rate this question:
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- 2.
Before LCDs, what was used?
- A.
CRTs
- B.
VHS
- C.
DVDs
- D.
USB flash disks
Correct Answer
A. CRTsExplanation
Before LCDs, CRTs (Cathode Ray Tubes) were commonly used as display devices. CRTs work by using an electron beam to create images on a phosphorescent screen. They were widely used in televisions, computer monitors, and other electronic displays before the advent of LCD technology. CRTs were bulky and required a lot of space, but they were able to produce high-quality images with good color reproduction. However, they were eventually replaced by LCDs, which offered a more compact and energy-efficient alternative.Rate this question:
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- 3.
What is the advantage that comes with LCD screens?
- A.
They do not suffer image burn-in
- B.
They don't break
- C.
They are waterproof
- D.
The image is very clear
Correct Answer
A. They do not suffer image burn-inExplanation
LCD screens do not suffer from image burn-in, unlike other types of screens such as CRT or OLED. Image burn-in occurs when a static image is displayed on a screen for a long period of time, causing a permanent ghost-like image to be visible even when the screen is showing a different image. This advantage of LCD screens ensures that the displayed images remain clear and free from any permanent damage or distortion.Rate this question:
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- 4.
What's the other term for a pixel?
- A.
Apel
- B.
Backlight
- C.
Photoshop
- D.
Omega
Correct Answer
A. ApelExplanation
The term "pixel" refers to a single point in a digital image. The other term for a pixel is "apel".Rate this question:
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- 5.
What are liquid crystals?
- A.
They are matter in a state which has properties between those of conventional liquids and those of solid crystals.
- B.
They are matter in a state which has properties of solid crystals.
- C.
They are matter in a state which has properties of conventional liquids.
- D.
They are matter in a state which has properties of liquid crystals.
Correct Answer
A. They are matter in a state which has properties between those of conventional liquids and those of solid crystals.Explanation
Liquid crystals are a unique state of matter that possess properties that are intermediate between conventional liquids and solid crystals. Unlike regular liquids, they exhibit a degree of order and alignment, similar to solid crystals, but they also retain the ability to flow and change their shape like liquids. This combination of properties makes liquid crystals highly useful in various applications, such as in electronic displays and optical devices, where their ability to switch between different states of alignment can be controlled and manipulated.Rate this question:
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- 6.
Who is said to have discovered the liquid crystalline nature of cholesterol?
- A.
Alexander Graham Bell
- B.
Charles Darwin
- C.
Friedrich Reintzer
- D.
Nikola Tesla
Correct Answer
C. Friedrich ReintzerExplanation
Friedrich Reintzer is credited with the discovery of the liquid crystalline nature of cholesterol. Reintzer was a German scientist who conducted extensive research on liquid crystals in the early 20th century. His experiments led to the identification and understanding of the unique properties of liquid crystals, including their ability to exhibit both liquid and crystalline characteristics. Through his work, Reintzer specifically identified the liquid crystalline behavior of cholesterol, which has since become an important finding in the field of materials science and has applications in various industries.Rate this question:
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- 7.
What produces light on an LCD panel?
- A.
Leds
- B.
Connectors
- C.
Backlight
- D.
Neons
Correct Answer
C. BacklightExplanation
The correct answer is backlight. LCD panels do not produce light on their own, so they require a backlight to illuminate the screen and make the images visible. The backlight is typically made up of LEDs (Light Emitting Diodes) that are positioned behind the LCD panel to provide uniform and bright illumination.Rate this question:
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- 8.
What are twisted nematics?
- A.
They are types of displays that contain crystals that twist and untwist a varying degrees to allow light to pass through.
- B.
They are types of displays that contain solid crystals that twist and untwist a varying degrees to allow light to pass through.
- C.
They are types of displays that contain liquid crystals that twist and untwist a varying degrees to allow light to pass through.
- D.
They are types of displays that contain liquid crystals that twist a varying degrees to allow light to pass through.
Correct Answer
C. They are types of displays that contain liquid crystals that twist and untwist a varying degrees to allow light to pass through.Explanation
Twisted nematics are types of displays that contain liquid crystals that twist and untwist to varying degrees, allowing light to pass through.Rate this question:
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- 9.
What's a transistor?
- A.
It's a semiconductor device used to amplify or switch electronic signals and electrical power.
- B.
It's a conductor device used to amplify or switch electronic signals and electrical power.
- C.
It's a simple device used to amplify or switch electronic signals and electrical power.
- D.
It's a semiconductor device used to amplify electronic signals.
Correct Answer
A. It's a semiconductor device used to amplify or switch electronic signals and electrical power.Explanation
A transistor is a semiconductor device that is commonly used in electronic circuits to amplify or switch electronic signals and electrical power. It is made up of three layers of semiconductor material, and its operation is based on the control of the flow of electric current through these layers. By applying a small input signal, the transistor can amplify it to a larger output signal, making it useful in amplifiers. Additionally, transistors can also be used as switches, allowing or blocking the flow of current, which is essential in digital circuits and logic gates.Rate this question:
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- 10.
How many distinct specifications do LCDs have?
- A.
5
- B.
4
- C.
6
- D.
8
Correct Answer
A. 5Explanation
LCDs have different specifications such as screen size, resolution, refresh rate, response time, and connectivity options. Each of these specifications can vary, resulting in distinct combinations. Therefore, LCDs can have multiple distinct specifications, and in this case, the correct answer is 5.Rate this question:
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