![LED-
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–
n junction diode that emits light when activated.
An LED screen is actually an LCD screen, but instead of having a normal CCFL backlight,
it uses light-emitting diodes (LEDs) as a source of light behind the screen. An LED is
more energy efficient and a lot smaller than a CCFL, enabling a thinner television screen
When a suitable current is applied to the leads,[6][7] electrons are able to recombine
with electron holes within the device, releasing energy in the form of photons. This
effect is called electroluminescence
1962, the earliest LEDs emitted low-intensity infrared light
The first visible-light LEDs were of low intensity and limited to red](https://image.slidesharecdn.com/applicationofcomputergraphicsandinputdevices-180520071253/85/Application-of-computer-graphics-and-input-devices-14-320.jpg)
Application of computer graphics and input devices
- 2. Computer-generated imagery is used for movie making, video game and computer program development, scientific modeling, and design for catalogs and other commercial art. Some people even make computer graphics as art
- 3. Applications of Computer Graphics
- 4. Display of Information • Computational Biology: Computational biology is an interdisciplinary field that applies the techniques of computer science, applied mathematics and statistics to address biological problems. The main focus lies on developing mathematical modeling and computational simulation techniques. Computational Physics: Computational physics is the study and implementation of numerical algorithm to solve problems in physics for which a quantitative theory already exists. It is often regarded as a sub discipline of theoretical physics but some consider it an intermediate branch between theoretical and experimental physics. Information of Graphics: Information graphics or information graphics are visual representations of information, data or knowledge. Business presentation graphics - "A picture is worth a thousand words" Scientific Visualization: Scientific visualization is a branch of science, concerned with the visualization of three dimensional phenomena, such as architectural, meteorological, medical, biological systems
- 5. Design • Graphic Design: The term graphic design can refer to a number of artistic and professional disciplines which focus on visual communication and presentation Computer-aided Design: Computer-aided design (CAD) is the use of computer technology for the design of objects, real or virtual. The design of geometric models for object shapes, in particular, is often called computer-aided geometric design (CAGD). Web Design: Web design is the skill of designing presentations of content usually hypertext or hypermedia that is delivered to an end- user through the World Wide Web, by way of a Web browser.
- 6. Video Game • Digital Art: Digital art most commonly refers to art created on a computer in digital form. Video Games: A video game is an electronic game that involves interaction with a user interface to generate visual feedback on a raster display device. The electronic systems used to play video games are known as platforms. This platform creates through graphics. Virtual Reality: Virtual reality (VR) is a technology which allows a user to interact with a computer-simulated environment
- 7. Simulation • Computer Simulation: A computer simulation, a computer model or a computational model is a computer program, or network of computers, that attempts to simulate an abstract model of a particular system. Education: Computer simulations have become a useful part of mathematical modeling of many natural systems in physics (computational physics), chemistry and biology, human systems in economics, psychology, and social science and in the process of engineering new technology, to gain insight into the operation of those systems, or to observe their behavior. Information Visualization: Information visualization is the study of the visual representation of large-scale collections of non-numerical information, such as files and lines of code in software systems, and the use of graphical techniques to help people understand and analyze data.
- 8. Flat Panel Display • A flat panel display is a television, monitor or other display appliance that uses a thin panel design instead of a traditional cathode ray tube (CRT) design. • First invented:1964 • Advantages- Space Saving Display Size Low Power Consumption Disadvantages- Durability Cost Viewing Angle
- 9. • Applications- Laptop Television cellular phone Digital cameras Camcorders
- 10. LCD-Liquid Crystal Display • nematic phase, liquid crystals are a bit like a liquid • smectic phase(when cooled),now molecules can move in layers only- solid • uses the light-modulating properties of liquid crystals
- 11. • Liquid crystals do not emit light directly, instead using a backlight or reflector to produce images in color or monochrome. • Used in LCD televisions, computer monitors, instrument panels, aircraft cockpit displays • LCD screens do not use phosphors, they do not suffer image burn- in when a static image is displayed on a screen for a long time • Energy efficient • Easy disposal
- 12. Types of LCD • Passive Matrix • Active Matrix Disadvantages lower contrast expensive slow restricted viewing angle(120 degree)
- 13. Some comparisons • Older LCD TVs used cold cathode fluorescent lamps (CCFLs) to provide backlighting, whereas LED TV's used an array of smaller, more efficient light emitting diodes (LEDs) to illuminate the screen, which gave them a few advantages • In a plasma screen, each pixel is a tiny fluorescent lamp switched on or off electronically. In an LCD television, the pixels are switched on or off electronically using liquid crystals to rotate polarized light.
- 14. LED- A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p– n junction diode that emits light when activated. An LED screen is actually an LCD screen, but instead of having a normal CCFL backlight, it uses light-emitting diodes (LEDs) as a source of light behind the screen. An LED is more energy efficient and a lot smaller than a CCFL, enabling a thinner television screen When a suitable current is applied to the leads,[6][7] electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence 1962, the earliest LEDs emitted low-intensity infrared light The first visible-light LEDs were of low intensity and limited to red
- 15. • Techopedia explains Flat Panel Display • New flat panel displays utilize a liquid crystal display (LCD) display. This system lights up various pixels on the screen. The simple and small infrastructure of flat panel displays allows for the manufacturing of extremely light and portable screens, which are popular for personal and business use. Some of the newest features of flat panel displays include new organic LED lighting techniques that allow for bendable display screens. Companies are experimenting with panoramic displays that are curved rather than flat.