Plasma display panel
Download as PPTX, PDF15 likes7,854 views
Plasma is a state of matter similar to gas in which some particles are ionized. Plasma TVs use small cells filled with ionized gas that produce light when electricity is applied. When UV light from the ionized gas hits phosphors, visible colors are produced to display an image. Plasma TVs offer advantages like exceptional color, high resolution, and widescreen ratios but also have disadvantages such as shorter lifespan, fragility, higher price, and potential image burn-in.
Plasma display panel
- 2. What is Plasma? Plasma is often called the "Fourth State of Matter", the other three being solid, liquid and gas. A plasma is a distinct state of matter containing a significant number of electrically charged particles, a number sufficient to affect its electrical properties and behavior. In addition to being important in many aspects of our daily lives, plasmas are estimated to constitute more than 99 percent of the visible universe.
- 3. PLASMA TV * A plasma display panel (PDP) is a type of flat panel display common to large TV displays 30 inches (76 cm) or larger. *Plasma display screens are made from glass, which reflects more light than the material used to make an LCD screen
- 4. PLASMA TV •They are called "plasma" displays because the technology utilizes small cells containing electrically charged ionized gases •Capable of producing deeper blacks allowing for superior contrast ratio
- 5. *oPlasma is a state of matter similar to gas in which a certain portion of the particles are ionized. *Heating a gas may ionize its molecules or atoms (reduce or increase the number of electrons in them), thus turning it into a plasma, which contains charged particles: positive ions and negative electrons or ions. *In the universe, plasma is the most common state of matter. Some common plasmas are stars and neon signs. PLASMA LAMP
- 6. Typical plasma displays consist of two glass plates, each with parallel electrodes deposited on their surfaces. The electrodes are covered with a dielectric film. The plates are sealed together with their electrodes at right angles, and the gap between the plates is filled with an inert gas mixture. A protective MgO layer is deposited above the dielectric film. The role of this layer is to decrease the breakdown voltage caused by the high secondary electron emission coefficient of MgO.
- 7. *
- 8. *
- 9. The discharge is initiated by applying a voltage pulse to the electrodes. Xenon gas mixtures are used to efficiently generate UV photons. The UV photons emitted by the discharge hit the phosphors deposited on the walls of the PDP cell and are converted into visible photons. Each cell contains phosphor that emits one primary color—red, green, or blue.
- 10. * * Plasma TVs offer many advantages over other television technologies: 1. Exceptional Color: Plasma TVs display up to 16.77 million colors. 2. High Resolution: Plasma TVs are able to display a high resolution, and are capable of displaying HDTV signals. 3. Widescreen Aspect Ratio: Plasma TVs offer a dramatic widescreen 16:9 ratio display. 4. Flat Screens: Plasma TVs offer perfectly flat screens, cutting down on image distortion and glare. 5. Magnetic Field Immunity. 6. Wider viewing angles than those of LCD 7.Uniform Screen Brightness.
- 11. * * Of course, not all technologies are perfect, and Plasma TVs do have some disadvantages compared to other TV technologies: 1. Shorter Life: Compared to other television technologies, Plasma TVs do generally have a shorter life span, and there is no option to repair a burnt out tube or backlight. 2. Fragility: Plasma TVs are a very fragile technology, and the units are quite easy to damage. 3. Price. 4. Not the Lightest or Slimmest. 5. Lower Brightness. 6. Potential Burn-In. 7. more electrical power than an LCD TV
- 13. ANY QUERIES ?
- 14. THANK YOU!