How do i know which blu-rays are designed for my 21:9 philips TV?

although the Blu-ray spec supports the encoding of full 2.35:1 film transfers that could map perfectly to every single one of the pixles no Blu-ray disc has yet used the option. Instead, black bars are placed above and below pictures at the mastering stage for 16:9 TVs, making them part of the picture that gets sent to your TV.