摘要:
Methods and systems for content distribution are provided that include a broadcast transmitter for transmitting a signal that comprises content, a receiver for receiving the signal, and an optical disc recorder coupled to the receiver for recording the content to an optical disc, which may be an optically altered optical disc.
摘要:
Communication methods and apparatus using ultraviolet (UV) light are provided. Save UV communication devices, including remote control units, can use highly efficient UV LEDs and very low-noise UV photodetectors. In some cases, the LEDs emit light at wavelengths below 400 nm, below 320 nm, or even below 280 nm. In one embodiment, communication can be achieved using an LED that emits less than about 1 picowatt of UV energy at a photodetector distance of up to at least about 10 meters. Longer range communication can also be achieved at higher power levels. Photodetectors having very low dark currents at room temperature, such as below about 1×10−9 A/m2, are preferable.
摘要翻译:提供使用紫外(UV)光的通信方法和设备。 保存UV通信设备(包括遥控器)可以使用高效的UV LED和非常低噪声的紫外线检测器。 在一些情况下,LED发射波长低于400nm,低于320nm,甚至低于280nm的光。 在一个实施例中,可以使用在高达至少约10米的光电探测器距离处发射小于约1皮瓦的UV能量的LED来实现通信。 更高的功率水平也可以实现更长距离的通信。 在室温下具有非常低的暗电流(例如低于约1×10 -9 A / m 2)的光电探测器是优选的。
摘要:
A method for disseminating emergency notification content from an emergency originating source. The method comprising: delivering the emergency notification content from the emergency originating source to at least one transmitting party; selecting a subset of users from among a set of users for dissemination of the emergency notification content based on the subject matter of the emergency notification content; and delivering the emergency notification content from the at least one transmitting party to a device corresponding to each user from the selected subset of users.
摘要:
A display element for use in a display device that exhibits extended illumination longevity and uniformity, as well as a wide viewing angle, is provided. The element can include a light source that emits ultraviolet light, a liquid crystal device having a plurality of independently controllable (i.e., addressable) shutters, a screening element between the light source and the liquid crystal device, a plurality of luminescent elements optically aligned with the shutters, and a regulated power supply. Display devices, calibration techniques, and power management methods are also provided.
摘要:
A method and apparatus for reading a storage medium is provided. The apparatus includes a plurality of emitters configured to emit a radiant energy at a predetermined optical wavelength, a plurality of detectors configured to detect the radiant energy at the predetermined optical wavelength, and a storage medium holder configured to hold the storage medium between the plurality of emitters and the plurality of detectors. A first detector is configured to detect radiant energy which is emitted by a first emitter through data holes of a first track of the storage medium, and a second detector is configured to detect radiant energy which is emitted by a second emitter through data holes of a second track of the storage medium.
摘要:
A method for disseminating emergency notification content from an emergency originating source. The method comprising: delivering the emergency notification content from the emergency originating source to at least one transmitting party; selecting a subset of users from among a set of users for dissemination of the emergency notification content based on the subject matter of the emergency notification content; and delivering the emergency notification content from the at least one transmitting party to a device corresponding to each user from the selected subset of users.
摘要:
A method is provided for making the storage media having data stored thereon. In one aspect of the making of storage media, a first layer is formed, where the first layer is substantially transparent to a predetermined first radiant energy used for reading the data. Next, a second layer is formed on the first layer, which is substantially opaque to the first radiant energy. Finally, a pattern is formed that comprises a plurality of holes in the second layer, where each of the holes have a largest dimension which is greater than a wavelength of the first radiant energy, and the data is stored as the presence or absence of a hole in the pattern.
摘要:
A storage media for storage of data thereon is provided. The storage media including: a first layer, the first layer being substantially transparent to a predetermined radiant energy used for reading the data; and a second layer formed on the first layer and being substantially opaque to the radiant energy, the second layer having a pattern comprising a plurality of holes, each of the holes having a largest dimension which is greater than a wavelength of the radiant energy, the data being stored as the presence or absence of a hole in the pattern. Also provided are a method for fabricating the storage media as well as an apparatus and method for reading the data stored on the storage media.
摘要:
Roadway and vehicular-mounted safety reflectors include a reflective field that incorporates a plurality of discrete crystals that internally reflect light and return the light in a desired directional pattern determined by the internal reflection characteristics and orientation of the crystals. The directional pattern is chosen to optimize the visibility and functionality of the reflector.
摘要:
A display element for use in a display device that exhibits extended illumination longevity and uniformity, as well as a wide viewing angle, is provided. The element can include a light source that emits ultraviolet light, a liquid crystal device having a plurality of independently controllable (i.e., addressable) shutters, a screening element between the light source and the liquid crystal device, a plurality of luminescent elements optically aligned with the shutters, and a regulated power supply. Display devices, calibration techniques, and power management methods are also provided.