Laptops What's the difference between LED backlit/LED LCD screens of a laptop?

[M@crosoft]

Hey fellas,

I have an acer AO751h netbook which has got some LED LCD screen ......a difference

that i note between my netbook and my uncle's notebook is the viewing angle.

The picture gets whitish when u move left or right in his case while the picture more or less remains colorful in my case !!

is this due to the LED screen which i have?

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anyone?????

 

[sagar_coolx]

There is no difference between led backlight and led lcd screens at all. no screen in the market deserves to be called led screen...not even the high-end ones which cost in lakhs, because all of them are lcd.

u see there are two parts to a flatscreen display
1.the panel
2.the backlight

the panels in use in laptops/monitors/non-plasma flatscreens are all LCD.
older lcd screens had ccfl light as backlighting(similar to a tubelight), but nowadays the use many tiny led's behind the panel to light it up.

now u're viewing angle problem depend purely on panel quality.It means ur laptop has a better panel than your uncle's.but for sure both ur screens are lcd screens with led backlighting.

 

[M@crosoft]

so all the new notebooks/netbooks out in the market will be having LEDs behind the panel with better viewing angle than what we had in older laptops?

 

[Vasishta.Sushant]

There is no difference between led backlight and led lcd screens at all. no screen in the market deserves to be called led screen...not even the high-end ones which cost in lakhs, because all of them are lcd.

u see there are two parts to a flatscreen display

1.the panel

2.the backlight

the panels in use in laptops/monitors/non-plasma flatscreens are all LCD.

older lcd screens had ccfl light as backlighting(similar to a tubelight), but nowadays the use many tiny led's behind the panel to light it up.

now u're viewing angle problem depend purely on panel quality.It means ur laptop has a better panel than your uncle's.but for sure both ur screens are lcd screens with led backlighting.

Perfect explanation. Glad that you explained it nicely.

 

[MrRIG]

so all the new notebooks/netbooks out in the market will be having LEDs behind the panel with better viewing angle than what we had in older laptops?

so all the new notebooks/netbooks out in the market will be having LEDs behind the panel with better viewing angle than what we had in older laptops?

There are various parts in LCD few are explained for you info.

1) LCD Screen: Also called Panel, whatever you saw on any LCD screen is created by LCD Screen. The screen cannot produce its own light as conventional TV does. Eg of Screen technologies are Twisted nematic (TN), Vertical alignment (VA), In-plane switching (IPS) and more. Remember VA has better viewing angle then TN and IPS has better viewing angle as well as color reproduction then VA.

2) Back Light: As already mention an LCD screen cannot produce its own light, it required external light to pass through it so that human eyes can see the images. The light source is aligned behind the panel. The technology now widely used is Cold Cathode Fluorescent Lamps (CCFL) and light-emitting diodes (LEDs). In case of CCFL a tube light like light emitting source is fitted either at the top, bottom or both places. CCFL consumes more energy and produce more heat. To save energy and heat manufacturers use LED. Due to the LED small size and low power consumption manufacturers using LED in Laptop screens way before they used in Desktop monitors.
Overall quality of any LCD depends upon LCD Panel, Light source and the way manufacturer structured it, for e.g. you may see visible difference in picture quality of TN monitors made by same manufacturer. The Samsung PX2370 (TN panel) has more or less same price range as Dell U2311H (IPS Panel) monitor both has excellent picture quality according to their price. That's why newer TN panel has better viewing angle than older TN panel.

 

[M@crosoft]

Thanks guys^^^.....really appreciate your help

 

[VtecComp]

There are various parts in LCD few are explained for you info.
2) Back Light: As already mention an LCD screen cannot produce its own light, it required external light to pass through it so that human eyes can see the images. The light source is aligned behind the panel. The technology now widely used is Cold Cathode Fluorescent Lamps (CCFL) and light-emitting diodes (LEDs). In case of CCFL a tube light like light emitting source is fitted either at the top, bottom or both places. CCFL consumes more energy and produce more heat. To save energy and heat manufacturers use LED. Due to the LED small size and low power consumption manufacturers using LED in Laptop screens way before they used in Desktop monitors.

It is connected through a inverter board which generates few thousands of volts to power CCFL tube in lcd panel, more than 50% of battery power is drained to power the CCFL.