Abstract: A photochromic laminate comprising a base material of a thermoplastic resin having light-transmitting property, a crosslinked resin layer formed on the surfaces of the base material and containing inorganic colloidal particles in an amount of 20 to 40% by mass, and a photochromic coating formed on the surfaces of the crosslinked resin layer. Though the laminate has the layer exhibiting photochromic property formed thereon by the coating method, the surfaces of the base material of a thermoplastic resin are suppressed from being whitened or swollen. Therefore, the base material exhibits excellent optical properties, a high adhesiveness to the photochromic coating, and superior durability.

Abstract: A chromene compound typically represented by the following formula, When placed in a state of developing color, the chromene compound exhibits absorption bands in two wavelength regions of 440 to 500 nm and 570 to 630 nm. A difference in the absorption intensity between the two absorption bands is small, and an intensity ratio in the color density in the two absorption bands is usually in a range of from 0.7 to 1.2. A color tone of a neutral tint such as grey or brown is obtained by using a single compound.

Abstract: A communication apparatus having a transmission section and a reception section that are selectively attached or detached from one another. The transmission section is operable to modulate an information signal to generate a high frequency signal and to wirelessly transmit the high frequency signal to the reception section, or to output the information signal to the reception section via a non-wireless coupling. The reception section is operable to receive the high frequency signal transmitted from the transmission section and to demodulate the high frequency signal to recover the information signal, or to receive the information signal outputted from the transmission section. Further, an attached condition is sensed, indicating whether the transmission section and the reception section are connected/attached to each other or disconnected/detached from each other, and switching between wireless transmission and non-wireless transmission is performed in accordance with the indicated condition.

Abstract: An antenna apparatus of the present invention includes a first circularly polarized antenna for a first frequency band, a second circularly polarized antenna for a second frequency band, and a substrate that is common to these two antennas. The antennas are disposed back to back on the front and rear surfaces of the substrate. High-frequency signals in the first frequency band and the second frequency band that are sent and received by the first circularly polarized antenna and the second circularly polarized antenna, respectively, are connected, via a common frequency synthesizer and a common coaxial cable, to an antenna connector of a wireless communication apparatus.

Abstract: In a wireless communication system dealing with a plurality of frequency bands such as 5.2 GHz band and 2.4 GHz band, without a disturbance from another wireless communication system or the like and abnormalities such as stop of a moving picture and disturbance of a picture, a large volume of data can be securely and smoothly transmitted on real time basis. In a frequency band (5.2 GHz band) communicable at higher transmission rates, unused radio channels free of a disturbing wave are detected in steps 101 to 103. In process routine 200, it is detected whether or not received field strengths exceed a threshold value in decreasing order from higher transmission rates on the detected radio channels. A communication is started at a transmission rate of which the received field strength reaches or exceeds the threshold value.

Abstract: A chromene compound represented by the general formula (1), wherein R1 to R4 are hydrogen atoms, hydroxyl groups, alkyl groups, alkoxy groups, substituted amino groups or halogen atoms, R1 to R4 may be bonded together to form a ring, R5 and R6 are alkyl groups, aryl groups or heteroaryl groups, or R5 and R6 together may form a ring, a cyclic group containing X or Y is an aromatic hydrocarbon group or an aromatic heterocyclic group, and a divalent group Z is an alkylene group. This compound exhibits excellent photochromic properties, such as small initial color, a large fading rate, excellent resistance and developing a color tone of a neutral tint.

Abstract: An antenna apparatus of the present invention includes a first circularly polarized antenna for a first frequency band, a second circularly polarized antenna for a second frequency band, and a substrate that is common to these two antennas. The antennas are disposed back to back on the front and rear surfaces of the substrate. High-frequency signals in the first frequency band and the second frequency band that are sent and received by the first circularly polarized antenna and the second circularly polarized antenna, respectively, are connected, via a common frequency synthesizer and a common coaxial cable, to an antenna connector of a wireless communication apparatus.

Abstract: A chromene compound represented by the general formula (1), 1

Abstract: A display apparatus signal transmitting and receiving apparatus, radio-transmission apparatus and a signal transmitting and receiving method are disclosed herein. A display apparatus is adapted to output a signal generated by electronic equipment. The display apparatus includes a control-signal receiving unit for receiving a control signal to control operations of the electronic equipment. An antenna is included for receiving the signal transmitted by the electronic equipment as an electric wave, and for transmitting the control signal. A control unit of the display apparatus is adapted to convert the control signal received by the control-signal receiving unit into a control signal that is transmissible as an electric wave, to supply the transmissible control signal to the antenna, and to carry out signal processing for outputting the signal received from the electronic equipment.

Abstract: A chromene compound typically represented by the following formula, 1

Abstract: Novel chromene compounds having various substituents to exhibit a high color-developing sensitivity and a high density even when dispersed in a high-molecular matrix, and exhibiting a large fading rate, less color when deteriorated, and excellent light resistance in the photochromic properties; photochromic materials containing the chromene compounds; and use thereof.

Abstract: Novel chromene compounds having various substituents to exhibit a high color-developing sensitivity and a high density even when dispersed in a high-molecular matrix, and exhibiting a large fading rate, less color when deteriorated, and excellent light resistance in the photochromic properties; photochromic materials containing the chromene compounds; and use thereof.

Abstract: Novel chromene compounds having various substituents to exhibit a high color-developing sensitivity and a high density even when dispersed in a high-molecular matrix, and exhibiting a large fading rate, less color when deteriorated, and excellent light resistance in the photochromic properties; photochromic materials containing the chromene compounds; and use thereof.

Abstract: A communication apparatus having a transmission section and a reception section that are selectively attached or detached from one another. The transmission section is operable to modulate an information signal to generate a high frequency signal and to wirelessly transmit the high frequency signal to the reception section, or to output the information signal to the reception section via a non-wireless coupling. The reception section is operable to receive the high frequency signal transmitted from the transmission section and to demodulate the high frequency signal to recover the information signal, or to receive the information signal outputted from the transmission section. Further, an attached condition is sensed, indicating whether the transmission section and the reception section are connected/attached to each other or disconnected/detached from each other, and switching between wireless transmission and non-wireless transmission is performed in accordance with the indicated condition.

Abstract: A high frequency circuit for a single superheterodyne receiving system in FDMA/TDD transmitting and receiving apparatus can be arranged so as to satisfy standards for spurious signals. The high frequency circuit block includes a receiving system and a transmitting system. A reception enable signal is supplied to the receiving system and a transmission enable signal is supplied to the transmitting system, so that a receiving channel and a transmitting channel are alternately switched. The transmission enable signal is supplied to the transmitting system via a rise delay circuit. The rise delay circuit is provided at an input side of the driver amplifier of the transmitting system.

Abstract: A digital broadcasting receiving apparatus that can be installed without regard to the location of the telephone outlet where a signal is received by a front-end, reception data is decoded by an A/V decoder, and a video signal and an audio signal are outputted from a D/A converter. Monitor information has been stored in an IC card and is periodically read into a memory by a CPU. Further, the monitor information is transmitted from the memory to a management system by the control of the CPU through a telephone line. A modem and a slave module of a cordless telephone are connected. The monitor information is transmitted between the slave module and an external master unit in a wireless manner. The monitor information is transmitted from the master unit to the management system through the telephone line.