Active 3D glasses require a power source like a battery to operate the LCD shutters, making the glasses heavier and bulkier than passive 3D glasses. They may also not be compatible with all 3D display types.
We can summarize the various challenges as the following:
- Energy efficiency for a long operating life
- Strict weight constraints
- Cross-display compatibility
- Sufficiently rapid lens shuttering to ensure an enjoyable experience and avoid discomfort or headaches.