How can I select a block of names in Minecraft?

So I have the following problem:

I would like to make a block called TV by CanDestroy Command with a special pickaxe degradable. Unfortunately this command does not work:

/ give @p minecraft: diamond_pickaxe {CanDestroy: ["minecraft: iron_door", "minecraft: black_concrete {display: {name: [{\" text \ ": \" TV \ ""}}

it works only if I give the block no name.

Set blocks have no name - you can't have one. As soon as you place a block, it loses its name. That's why it does not work.

It works only if I give the block no name.

What do you think?

OK thanks

It's clear now. Nevertheless, dnake!