| 摘要 |
<p>An optical disc is provided with an internal optical shutter. The optical shutter may be, for example, an electro-optic or electrochromic device. The optical shutter may cooperate with an antenna and an RF circuit for selectively setting the state of the switch. In one state, the switch makes the optical disc unreadable, and in the switch's activated state, the optical disc plays normally. The optical disc may be constructed using a cap substrate bonded to a data substrate. The electro-optic device is positioned on the inside surface of the cap. The antenna and RF circuit also may be positioned on the inside surface of the cap, or may be mounted externally. The data substrate has one or more data layers formatted for play in an associated DVD player, high definition player, CD player, or gaming console. In some constructions, the cap may also have one or more data layers.</p> |
