摘要:
An LED is used as a light source of the emergency light. Data are normally received through a power line, demodulated at a modem section, and stored in a data memory. In an emergency, a change sectio switches the power line to a battery, and LED emits light and functions as the emergency light. At this time, the data stored in the data memory is read and demodulated at a light modulation section, and used to control blinking of the LED and the light intensity. Thereby, the data can be transmitted by the light. In an emergency, information on an emergency exit, an escape route, etc. can be received, if a mobile terminal having a light-receiving section receives the light from the emergency light.
摘要:
An LED is used as a light source of the emergency light. Data are normally received through a power line, demodulated at a modem section, and stored in a data memory. In an emergency, a change sectio switches the power line to a battery, and LED emits light and functions as the emergency light. At this time, the data stored in the data memory is read and demodulated at a light modulation section, and used to control blinking of the LED and the light intensity. Thereby, the data can be transmitted by the light. In an emergency, information on an emergency exit, an escape route, etc. can be received, if a mobile terminal having a light-receiving section receives the light from the emergency light.
摘要:
The present invention has been developed considering the above-described problems and aims to provide various structures and applications for illuminative light communication. According to the first aspect of the prevent invention, a broadcast system includes an LED light source 115 for lighting, a power line 103 that supplies electric power to the LED light source 115, a data modulator 102 that modulates and multiplexes a plurality of pieces of data, superimposes the resulting signal on an electric power waveform, and then transmits the resulting superimposed signal waveform to the power line 103, and a filter 112 that selectively separates one or more of a plurality of pieces of modulated data on the power line so as to control light intensity or blinking of the LED light source. Data is transmitted through changes in light intensity or blinking of the LED light source.
摘要:
The present invention provides a power supply for a semiconductor light emitting device capable of efficiently modulating and driving a current-driven semiconductor light emitting device. An LED 31, a switching element 32, which modulates and drives the LED 31, and an average current detector 12, which detects an average current flowing through the LED 31, are connected to a voltage source 11. When the LED 31 is modulated and driven by the switching element 32, blinking or light quantity of the LED is controlled, and the LED 31 then emits modulated light. The average current detector 12 detects an average light quantity emitted from the LED 31 and then controls the voltage source to output a voltage so that the average current flowing through the LED 31 can be almost constant. As a result, the average light quantity may be kept almost constant with or without modulation of the LED 31.
摘要翻译:本发明提供一种能够有效调制和驱动电流驱动半导体发光器件的半导体发光器件的电源。 LED 31,调制驱动LED31的开关元件32和检测流过LED31的平均电流的平均电流检测器12连接到电压源11。 当LED31被开关元件32调制和驱动时,LED的闪烁或光量被控制,然后LED31发出调制光。 平均电流检测器12检测从LED31发出的平均光量,然后控制电压源输出电压,使流过LED31的平均电流几乎恒定。 结果,平均光量可以在LED 31的调制或不调制的情况下保持几乎恒定。
摘要:
An information processing apparatus includes a display unit having a first reflective plate and a second reflective plate forming a reflective-plate unit, and a third reflective plate. The first reflective plate is bonded to an external frame, and the second reflective plate is connected to a reflective-plate hinge. In addition, the third reflective plate is pivotally connected-to the reflective-plate hinge, and a diffusion plate is bonded to the third reflective plate. Light emitted from a cold-cathode fluorescent lamp is guided by an optical waveguide and illuminates the entire surface of a liquid crystal panel. In addition, a part of the light is reflected by the second reflective plate, is incident on the diffusion plate bonded to the third reflective plate, is efficiently diffused by the diffusion plate, and uniformly illuminates an operation unit such as a keyboard.
摘要:
Disclosed are expandable thermoplastic polymer particles and process for preparing the same.Expandable thermoplastic polymer particles superior in processability as well as expansion are prepared by controlling an amount of inside moisture contained in said particles coated or impregnated with a blowing agent to not more than 1% by weight based on polymer, immediately after prepared.
摘要:
In the case of performing communication by using illumination light when the illumination is on, switches are turned on, a signal modulated in an optical modulation part in accordance with information is superposed to a power waveform for the illumination with a power distributor and the illumination 16 is driven in a modulated state. When the illumination is off, the switches are turned off, a switch is turned on and a communication part is driven in a modulated state by the optical modulation part. The communication part can be constituted so as to include an infrared light emitting element part to perform infrared communication when the illumination is off. Consequently communication can be performed not only when the of illumination is on but also when the lighting is kept off. The communication device can be constituted of one element integrating the illumination part and the communication part, so that a compact system can be constituted.
摘要:
An information processing apparatus that controls reproduction of first content and second content to simultaneously reproduce the contents is disclosed. The information processing apparatus includes: first reproduction control means for controlling reproduction of the first content; selecting means for selecting, from first metadata attached to the first content, first theme metadata representing a theme of the first content and the second content to be reproduced; second reproduction control means for controlling reproduction of the second content when the first theme metadata and second metadata attached to the second content are the same; and comparing means for comparing second theme metadata selected by the selecting means from metadata of the second metadata different from the first theme metadata and third metadata attached to third content, wherein the first reproduction control means controls reproduction of the third content when the second theme metadata and the third metadata are the same.
摘要:
The objective of the present invention is to provide accurate position data of a cellular phone utilizing illuminative light based radio communication. In FIG. 1, an emergency light or guided light (illuminating device) (10) on for 24 hours, for example, emits a visible light (illuminative light) modulated based on information of its position. A cellular phone (20) having a visible light receiving unit (a camera, for example) may obtain position data by receiving and demodulating that visible light. When conducting emergency communication (emergency telephone number 110 or 119) with the obtained position data, the position data may be automatically added for data communication in addition to the information by voice.
摘要:
A radio communication apparatus having a function for allowing it to be connected both to an ad hoc network and to a mobile communication network, yet having a structure that is not complicated with cost increases suppressed, and yet being capable of smoothly switching between the networks. The radio communication apparatus (10) uses a TDD-CDMA system for communication with a base station of the mobile communication network, and comprises ad hoc communication means for performing a radio communication with another neighboring radio communication apparatus by making an ad hoc network in conjunction with the other radio communication apparatus. This ad hoc communication means, when communicating with the other radio communication apparatus, uses the TDD-CDMA system common to the mobile communication network.