Here's why:
* Early Animations: While others like Winsor McCay and James Stuart Blackton made significant contributions to animated film, their work was primarily based on hand-drawn sequences.
* Théâtre Optique: Reynaud's device projected *projected* animated films using a series of hand-painted images on celluloid strips. This system was more advanced than earlier techniques like the flipbook.
However, it's important to remember that animation techniques existed before Reynaud's Théâtre Optique. For example, the Zoetrope, an early animation device, was invented in the 1830s.
Therefore, while Reynaud's contribution was significant, the history of cartoon film is a complex and collaborative one.