Rendering json has encoded characters

hello all
i’m using rails3.0.10

def districts
    @names = Node.where("name like ?", "%#{params[:term]}%").limit(5).map(&:name)
    respond_to do |format|
      format.json {render :json => @names}
      format.xml {render :xml => @names}
    end
  end

render xml get right names
but render json make the names is encoded

any help?

Thanks in advance