Are televisions AC or DC? Why?

Question

I know that houses recieve current in AC because it's easier to transmit and transform and all that.

What i want to know is if TV's use that AC current or convert it to DC current to use in the cathode rays or whatever.

And if they are AC is that because DC wouldn't work and veis versa?

again....

p37ry;

I KNOW WHAT POWER IS INPUT INTO THE TV. I get that is AC. I get WHY household power is AC.

The only thing i wanted to know is if there was a conversion of AC to DC inside the television and why.

No, your websites say nothing except about AC use and transmission. Which i already know. As i think i may have mentioned.

As you may have noted from other peoples answers, it seems that televisons DO in fact convert AC electricity to DC.

which is what i was actually asking for.

Thank you for your time.

Answer 1

What happens is that the house mains are AC , the reason AC is chosen is because by using transformers any desired voltage can be obtained.
Now a TV takes the AC the first thing to happen is that the AC is rectified ( converted ) to DC, now this DC voltage is used to run a regulated power supply whose sole job is to provide various differing voltages to the various circuits , .Regulated power supply means that what ever happens to house mains like going up or down the power supply output remains constant . That means when the mains supply goes down your picture remains the same size !!
Look I am getting carried away here , you did not ask for all this but I am sure it will be help full .
PS. DC would work just like a TV in a car does.
Cheers Pete

Answer 2

Again...

Most household televisions are AC so that they can make use of tuning circuits.

See here:
http://www.school-for-champions.com/science/ac.htm

There are DC televisions that will use 12 volt DC power from an automobile, but the current is converted to AC using an internal inverter.

See here:
http://rivrdog.typepad.com/paratus/2007/01/ac_power_via_dc.html

Hope this helps!

Answer 3

a tv is AC..inside the TV it stores it so it can be used when you switch it on (you know when you first put it on? it takes a couple of seconds to actually show a picture?) tv's use the electricity like DC because it takes it from where it is stored in the tv.
a TV would work if it was DC because you can have them in your car which runs on DC.