About LED monitors and different types in it

1. LED MONITORS
HARDWARE

2. ABBREVIATION AND ABOUT LED MONITORS
• LED is the abbreviation for light-emitting diodes.
• A LED display is a flat panel display that uses an array of light-emitting diodes as pixels for a
video display.
• Their brightness allows them to be used outdoors where they are visible in the sun for store signs and
billboards.

3. HOW IT FUNCTIONS ?
• The back-lighting is usually provided by light-emitting diodes (LEDs).
• The important feature is the use of polarized light directed towards the pixel matrix and the use of a
further polarizer between the pixel matrix and the screen.
• If a voltage is applied to an individual pixel cell the alignment of the liquid crystal molecules is affected
and in turn this can change the polarization of the light and therefore affect what is displayed on the
screen.
• There are a number of different technologies but the principle of their functioning is the same and color
displays use red, green and blue combinations as before.

4. ADVANTAGES
• Slim Design
• Brighter and sharper Images
• Better Color
• Flicker-Free Images
• Better Picture Quality(true black picture)
• No motion delay and lags
• Longer lifespan and less environmental impact
• Lower Power Consumption
• Wider Viewing angle(typically 175 degree)

5. DISADVANTAGES
• LEDs are more expensive than conventional lighting technologies
• LEDs can shift color due to age and temperature
• LED is a lot thinner than the LCD or Plasma.
• Contrast ratios not consistent
• Much higher price

6. ORGANIC LIGHT-EMITTING DIODE (OLED)
• More recently, a different technology has been introduced.
• This is based on the use of an organic light-emitting diode (OLED) to create the pixel.
• The OLEO is used directly as a light source so this technology requires no back-lighting.

7. QUANTUM LIGHT-EMITTING DIODE (QLED)
• The important bit of QLED is the Q, which stands for Quantum Dot.
• Quantum Dots offer a different way for screens to produce color instead of the usual inefficient and
limited combination of white LEDs and color filters.

9. DOT MATRIX LED DISPLAY
• LED dot matrix displays can be considered as the next logical step up from 16-segment alphanumeric
arrangements.
• In a typical dot matrix LED display, the clustering of individual diodes is dense, while the dots (LEDs) are
typically arranged in a rectangular grid that is wider than it is tall.
• The basic operating principle of an LED matrix display is straightforward.
• By turning individual lights on or off in programmable sequences, full alphanumeric displays can be
rendered as a matrix in reasonable detail.
• The precise level of detail achievable will depend on the density of the LED array and the resolution of
the dot matrix.
• This may also impact the digit height.

10. 7-SEGMENT LED DISPLAY
• An LED 7-segment display is one in which any numeral can be laid out using an arrangement of seven
separate LED segments.
• The individual diodes in a 7-segment display are arranged in a rough figure-eight system so that each
LED segment can be individually illuminated (or left unlit), allowing the grouping to display any digit
from 0-9.

11. 14-SEGMENT LED DISPLAY
• A 14-segment LED display takes much the same basic format as the 7-segment version but uses double
the number of diodes.
• They are arranged in the familiar figure-eight shape, but with the addition of diagonal diodes crossing
through the centre point.
• This configuration is also known as a Union Jack or starburst LED display.

12. 16-SEGMENT LED DISPLAY
• As with 7-segment and 14-segment displays, a 16-segment LED display also conforms to the same basic
figure-eight module arrangement.
• However, an additional pair of diodes are added by splitting both the upper and lower horizontal
segments into two.