Maker Pro
Maker Pro

What exactly is an LED TV set in the UK?

  • Thread starter Geoffrey S. Mendelson
  • Start date
G

Geoffrey S. Mendelson

Jan 1, 1970
0
Following up our previous discussion, in light of the recent (yesterday?)
Pringles decision, what exactly can and can not be sold as an LED TV in
the UK?

For those not following the case, Pringles were excempted from VAT (sales tax
is the closest thing in the US) because while snacks such as potato crisps
(potato chips in the US) are taxed, Pringles are less than 50% potato and
therefore for tax purposes are cakes, which were not taxable.

The judge decided that if it looked like a potato chip and was sold as a
potato chip, it was for tax purposes a potato chip, no matter what it
contanined.

So based on that decsision, which now establishes a legal precedent, what
role does an LED have to play in the operation and display of a television
set in order for it to be an "LED Television"?

Geoff.
 
N

N_Cook

Jan 1, 1970
0
Geoffrey S. Mendelson said:
Following up our previous discussion, in light of the recent (yesterday?)
Pringles decision, what exactly can and can not be sold as an LED TV in
the UK?

For those not following the case, Pringles were excempted from VAT (sales tax
is the closest thing in the US) because while snacks such as potato crisps
(potato chips in the US) are taxed, Pringles are less than 50% potato and
therefore for tax purposes are cakes, which were not taxable.

The judge decided that if it looked like a potato chip and was sold as a
potato chip, it was for tax purposes a potato chip, no matter what it
contanined.

So based on that decsision, which now establishes a legal precedent, what
role does an LED have to play in the operation and display of a television
set in order for it to be an "LED Television"?

Geoff.


It will be easier when OLED comes in proper. Then like traditional CRT
displays, light source and info source are intimately combined together.

Anyone happen to know, diagonal for diagonal, how much better, if any, OLED
set total unit power consumption will be over CRT set ?
 
A

att2

Jan 1, 1970
0
N_Cook said:
It will be easier when OLED comes in proper. Then like traditional CRT
displays, light source and info source are intimately combined together.

Anyone happen to know, diagonal for diagonal, how much better, if any,
OLED
set total unit power consumption will be over CRT set ?
The OLEDs will have much lower power consumption as they function without a
backlight of any type. I don't know if there's been any progress in the
lifetime issue, the blue LEDs have a very short lifetime compared to the red
& green LEDs.
You can get some SMALL OLEDs to mess with from 4D systems or sparkfun,
depending on where you live.
 
G

Geoffrey S. Mendelson

Jan 1, 1970
0
att2 said:
The OLEDs will have much lower power consumption as they function without a
backlight of any type. I don't know if there's been any progress in the
lifetime issue, the blue LEDs have a very short lifetime compared to the red
& green LEDs.
You can get some SMALL OLEDs to mess with from 4D systems or sparkfun,
depending on where you live.

When I was first specing out OLED displays for a handheld device, they were
rated at about 10k hours before loosing half their brightness for red and
green, and 2k for blue. Last I checked, they were up to about 20k for red
and green and 10k for blue.

The lifetime issue depends upon the level you drive them at. If you run them
at full brightness, you will begin to notice a shift away from blue (to yellow)
quickly. If you run them at half brightness and slowly crank up the blue to
balance, they will last a lot longer.

I guess one of the ways to make them last longer would be to use a pattern
that has more blue, such as red-green-blue-blue, or red-blue-green-blue, or
something similar. Then you could run the blue at half level and still have
it white and a resonable combined life time.

In the end, I'm not sure it matters. Once the newness fades and development
costs are paid off the cost will be so low that you will be able to buy
a "raw" screen in a roll, unroll it and slide it into your TV set or computer
monitor frame.


Geoff.
 
S

Sjouke Burry

Jan 1, 1970
0
Just out of curiosity, what causes LEDs to reduce in brightness over
time? I can understand why florescent lamps and white LEDs fade, but
not pure color LEDs. Anyone know?
Heat causes impurity's to diffuse in semiconductors.
More heat:more diffusion.
To much diffusion: A broken semicunductor.
 

green1706

Jul 26, 2009
1
Joined
Jul 26, 2009
Messages
1
LED TV is a term used by Samsung to describe its line of LCD (liquid crystal display) TVsthat use LED backlighting.
LED-backlit LCD TVs do differ from conventional LCD TVs in some important areas:
1- They can produce a very bright image and deep blacks (doesn't work for Edge-LED
2- With Edge-LED lighting they can be extremely slim.
3- They can offer lower power consumption.
4- They can offer a wider colour gamut, especially when RGB-LED backlighting is used.
So, that way it could be a LED Television.
 
Top