The document discusses different types of display devices including CRT and plasma display panels. CRT uses an electron gun to direct an electron beam at phosphorescent dots on a screen to display images. Color CRT monitors use three electron guns and a shadow mask to activate red, green, or blue phosphor dots to produce color. Plasma display panels contain two glass plates separated by a gas that is electrically excited into plasma to stimulate phosphors and emit light for each pixel.

1. WELCOME

3. The e important terms associated with display devices are:

4. Resolution: the maximum number of points the at can be displayed without overlap is called resolution.

7. The aim of the systems is to direct the beam to specified points on the screen. The screen is phosphorous coated.

8. The phosphorous has the property a beam strikes on the screen it emits small spot of light.

11. Control grid controls the intensity of the electron beam.

12. Electro static deflections are normally used in televisions & computers monitors.

13. The beam passes through two pair of metal plates.

14. One pair of vertical plates & another pair of horizontal plates.

16. Beam penetration method

18. One phosphor emits red light, another emits green light and the third emits blue light.

19. Three electron guns are used one for each dot.

22. They activate a dot triangle, which appears as a small color dot on the screen.

24. In plasma display a gas in the cells is electrically turned into plasma then excites phosphorus to emit light

25. The two glass plates with neon and xenon gas.

26. A series of vertical and horizontal electrodes are placed on the front and rare glass plates.

28. Thank you!