Question

Please answer your questions in paragraphs of six to ten sentences

1. Several types of LED technology are used in monitors, TVs, and mobile devices. Name these technologies and briefly describe the differences.

2. Experts are claiming that 3D printers are going to change a variety of industries. Name at least two of these industries and provide a few examples of the products that will be 3D printed

Answer 1

1.)  Types of LED technology used in monitors, TVs, and mobile devices are :-

a) Liquid crystal displays

LCDs are lightweight, compact, portable, cheap, more reliable, and easier on the eyes than cathode ray tube screens. LCD screens use a thin layer of liquid crystal, a liquid that exhibits crystalline properties. It is sandwiched between two electrically conducting plates. The top plate has transparent electrodes deposited on it, and the back plate is illuminated so that the viewer can see the images on the screen. By applying controlled electrical signals across the plates, various segments of the liquid crystal can be activated, causing changes in their light diffusing or polarizing properties. They are used in various electronics like watches, calculators, and notebook computers.

b) Liquid crystal displays with light-emitting diode

Some LCD screens are backlit with a number of LEDs. LEDs are two-lead semiconductor light source that resembles a basic "pn-junction" diode, except that an LED also emits light. This form of LCD is the most prevalent in the 2010s. This form of LCD is still a Liquid Crystal Display panel. It is not a separate technology from an LCD.

c) Plasma panels

A plasma display consists of two glass plates separated by a thin gap filled with a gas such as neon. Each of these plates has several parallel electrodes running across it. The electrodes on the two plates are at right angles to each other. A voltage applied between the two electrodes one on each plate causes a small segment of gas at the two electrodes to glow. The glow of gas segments is maintained by a lower voltage that is continuously applied to all electrodes.

d) Electroluminescent panels

In an electroluminescent display (ELD), the image is created by applying electrical signals to the plates which makes the phosphor glow.

e) Organic light-emitting diode

An OLED is a light-emitting diode in which the emissive electroluminescent layer is a film of organic compound which emits light in response to an electric current. This layer of organic semiconductor is situated between two electrodes; typically, at least one of these electrodes is transparent. OLEDs are used to create digital displays in devices such as television screens, computer monitors, portable systems such as mobile phones, handheld game consoles and PDAs. A major area of research is the development of white OLED devices for use in solid-state lighting applications.

2.) The 3D printing industry is expected to change nearly every industry it touches, completely disrupting the traditional manufacturing process. As a result, the projected value of the industry is expected to explode in the near future.3D printers are going to change a variety of industries and two of these industries are:-

a) medicine and healthcare

Bioprinting is one of the fastest-growing areas of 3D printing. The technology uses inkjet-style printers to make living tissue. Organovo, the most well-known company who does this, plans to commercialize 3D-printed liver tissue sometime this year. They have also partnered with the National Eye Institute and the National Center for Advancing Translational Sciences to print eye tissue.

b) Automotive

This industry is already utilizing the technolog.Ford reportedly uses 3D printing to test parts. High-end and smaller auto companies will benefit first, though 3D printing could improve the efficiency of making replacement parts for any company.