| 摘要 |
<p>A projection screen providing an improved contrast between projected light and ambient light, which projection screen comprises a light-absorbing layer and an active layer located in front of said light-absorbing layer. The active layer is transparent to light having a first direction of polarization and reflective to light having a second direction of polarization. The reflecting polarizing layer may be provided between the active layer and the light-absorbing layer.</p> |
