EmberJS call Handlebars Helper from component

Got a view > component structured application. In the 'controller' of the component, got the following code:

EmberApp.MyComponent = Ember.Component.extend({
   ...
   someFunction: function(){
      //here I must call 'myHelper'
   },
   ...
});

And in other part of the script:

Ember.Handlebars.helper('myHelper', function(param1, param2){
   //whatever it does
});

Ok, inside my HBS view file got the following:

{{myHelper aParam1 aParam2}}

It works partialy nice, that means that the helper works when view scope is loaded, but when I try to trigger the function, don't know how to call to the helper, so far I've tried:

Ember.Handlebars.helpers.myHelper.apply(this, {..params..});