Difference between LED and OLED display

Parameter	LED	OLED
Acronym for	Light Emitting Diode	Organic Light Emitting Diode
Description	It is a flat panel display that uses array of light emitting diodes as video display.	It is also a type of LED in which organic compound is used as emissive electroluminescent layer to emit light when electric current is supplied to it. These OLEDs are self illuminating.
Brightness	LED displays can get extremely bright and have slight advantage.	OLED display can also produce brighter displays but shining OLED pixels to maximum results in reduced pixel life.
Flexibility	Hard Material is used as substrate and can not be used to make flexible displays.	OLED can be fabricated on plastic substrates and can be used for making roll up display and can be embedded in cloths in future.

Difference between Raster and Vector Display

Characteristics	Raster Scan	Vector Scan
Working	In raster scanning, the beam sweeps horizontally left-to-right at a steady rate, then blanks and rapidly moves back to the left, where it turns back on and sweeps out the next line. During this time, the vertical position is also steadily increasing (downward), but much more slowly – there is one vertical sweep per image frame, but one horizontal sweep per line of resolution.	In Vector scan The electron beam follows an arbitrary path tracing the connected sloped lines. The beam skips over dark areas of the image without visiting their points.
Refresh rate	60 to 80 frames per second.	Depends upon image to be drawn.
Stores Picture Definition in	Refresh buffer or Frame buffer	Refresh Display file or Display Program
Image Drawing	Image is composed of glowing pixels.	Image is composed of drawn lines.
	Can be used to draw complex drawings.	They can display only a shape’s outline.