Abstract:
An antenna device for receiving AM radio broadcasts and FM radio broadcasts. The antenna device can be realized at low cost. An FM antenna conductor (2) for receiving FM radio broadcasts is a metal pipe having a good conductivity. An AM antenna conductor (5) for receiving AM radio broadcasts is accommodated in a space portion (2a) inside the FM antenna conductor (2). As a result, integration of the AM and FM antennas is realized with a simple structure. The FM antenna conductor (2) serves as an electrostatic shield member for the AM antenna conductor (5). Therefore, the AM antenna conductor (5) of the antenna device is prevented from receiving high-frequency noises, as interfering waves, from the apparatus having the antenna device without increasing the cost.
Abstract:
An antenna device having a loop antenna with a good noise resistance performance. The loop antenna is composed of a loop conductor section formed of a looped conductive wire and a shield member covering the loop conductor section. The antenna device is connected to a receiving circuit at two terminals. The loop conductor section has a non-covered portion corresponding to the portion of the conductive wire including the reference position with respect to which the two terminals are symmetrical. Thus, a balancing shield structure is created. A line for connecting one end of the conductive wire to the ground potential and a line for connecting the shield member to the ground potential are separately provided. The voltage drop due to the common impedance is hardly received by the antenna.
Abstract:
A loop antenna device includes a loop antenna having a high noise resistance performance. In a loop antenna having a shield member covering a looped conductor portion formed in a loop shape from a conductive wire, a non-covered portion where the looped conductor portion is not covered is formed in correspondence with a portion of the conductive wire including a reference position for the symmetry of two terminals for connection between the antenna device and a reception circuit. This provides a balanced shield structure. Besides, a line for connecting one end of the conductive wire to the ground potential and a line for connecting the shield member to the ground potential are individually separate from each other, whereby reception of a voltage fall due to common impedance by the antenna is suppressed.
Abstract:
An antenna apparatus capable of receiving AM radio broadcasting and FM radio broadcasting and being realized at a low cost includes an FM antenna conductor for receiving FM broadcasting formed with a metal pipe with good conductivity, and an AM antenna conductor for receiving AM broadcasting housed in an internal space of the antenna conductor, so as to unify an AM antenna and an FM antenna with a simple structure. The FM antenna conductor also functions as an electrostatic shielding member for the AM antenna conductor, so that high-frequency noise from other equipment is prevented from being received at the AM antenna conductor as interference noise without raising the cost.
Abstract:
A signal transmission system in which a variety of electronic apparatus (4 to 10,13) which can transmit audio and/or video informations (AV informations) or the like are concentratedly installed is comprised of main control means (3) for controlling a variety of electronic apparatus and sub-control means (25) installed via cables within a plurality of sub-rooms (20 to 22) so that the AV informations can be listened to and viewed through the main control means (3). In order to transmit much more informations within the narrow frequency band, the AV informations are allocated to predetermined channels and a channel content information indicating the AV informations allocated to the respective channels and an owner information indicative of the sub-room of the owner who exclusively uses the electronic apparatus are frequency-multiplexed with the AV informations and transmitted. Therefore, data of a variety sources (4 to 10,13) can be transmitted within the narrow frequency band and a plurality of users can generally understand the present status of the limited sources and select informations, thus avoiding the system from being disturbed.
Abstract:
A digital broadcast receiver comprising frequency specifying means (34-36) for specifying a receive frequency (frequency block), content type specifying means (37, 38) for specifying a broadcast content type, and control means (43) for controlling signal reception with a specified receive frequency and controlling such that a digital broadcast having a specified broadcast (program) content is identified among and selected from a plurality of digital broadcast signal according to a set of broadcast content type information. The control means (43), when a changed receive frequency is specified by the frequency specifying means (34-36), controls the signal reception with the new receive frequency and, if a broadcast content had been specified by the content type specifying means (37, 38) before the receive frequency was changed, controls such that a digital broadcast signal with the broadcast content specified by the content type specifying means (37, 38) is selected from a plurality of digital broadcast signals received at the new receive frequency.
Abstract:
A signal transmission system in which a variety of electronic apparatus (4 to 10,13) which can transmit audio and/or video informations (AV informations) or the like are concentratedly installed is comprised of main control means (3) for controlling a variety of electronic apparatus and sub-control means (25) installed via cables within a plurality of sub-rooms (20 to 22) so that the AV informations can be listened to and viewed through the main control means (3). In order to transmit much more informations within the narrow frequency band, the AV informations are allocated to predetermined channels and a channel content information indicating the AV informations allocated to the respective channels and an owner information indicative of the sub-room of the owner who exclusively uses the electronic apparatus are frequency-multiplexed with the AV informations and transmitted. Therefore, data of a variety sources (4 to 10,13) can be transmitted within the narrow frequency band and a plurality of users can generally understand the present status of the limited sources and select informations, thus avoiding the system from being disturbed.
Abstract:
A digital broadcast receiver comprising frequency specifying means (34-36) for specifying a receive frequency (frequency block), content type specifying means (37, 38) for specifying a broadcast content type, and control means (43) for controlling signal reception with a specified receive frequency and controlling such that a digital broadcast having a specified broadcast (program) content is identified among and selected from a plurality of digital broadcast signal according to a set of broadcast content type information. The control means (43), when a changed receive frequency is specified by the frequency specifying means (34-36), controls the signal reception with the new receive frequency and, if a broadcast content had been specified by the content type specifying means (37, 38) before the receive frequency was changed, controls such that a digital broadcast signal with the broadcast content specified by the content type specifying means (37, 38) is selected from a plurality of digital broadcast signals received at the new receive frequency.
Abstract:
An antenna apparatus capable of receiving AM radio broadcasting and FM radio broadcasting and being realized at a low cost includes an FM antenna conductor for receiving FM broadcasting formed with a metal pipe with good conductivity, and an AM antenna conductor for receiving AM broadcasting housed in an internal space of the antenna conductor, so as to unify an AM antenna and an FM antenna with a simple structure. The FM antenna conductor also functions as an electrostatic shielding member for the AM antenna conductor, so that high-frequency noise from other equipment is prevented from being received at the AM antenna conductor as interference noise without raising the cost.
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic apparatus system including an electronic apparatus on which a shop front support mode is installed and which attains the compatibility of the convenience of a sale shop side or the like and that of a general user side. SOLUTION: The electronic apparatus system comprises one or more electronic apparatuses and an input apparatus, and prescribed operations related to a commercial exhibit mode are performed by the electronic apparatus side only in response to a prescribed command transmitted by the input apparatus. Thus, even when a plurality of the electronic apparatuses are in use, the single entry apparatus supplies the start operation of the commercial exhibit mode to each of the plurality of electronic apparatuses. When the input apparatus is provided to only the side for performing commercial exhibit such as the shop front side, the use of the entry apparatus as above by a general user is made impossible and the commercial exhibit mode cannot be started when the general user uses the electronic apparatus. Thus, the convenience at the sales shop side or the like and the convenience of the general user side can be made compatible. COPYRIGHT: (C)2005,JPO&NCIPI