Edit in JSFiddle

var HelloCtrl = function($scope, $timeout) {
    $timeout(function() {
        $scope.name = 'seikichi';
    }, 3000);
};

<div ng-app ng-controller="HelloCtrl">
    <label>Name:</label>
    <input type="text" ng-model="name" placeholder="Enter a name here" />
    <hr/>
    <h1>Hello {{name}}!</h1>
</div>