专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JPH03277100A ULTRASONIC PARAMETRIC SPEAKER 失效
公开(公告)号：JPH03277100A
公开(公告)日：1991-12-09
申请号：JP7791190
申请日：1990-03-27
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： KOBAYASHI SUSUMU , ARIKAWA YASUSHI , UENO YOSHIAKI , MIZUGUCHI KEIICHI
IPC分类号： H04R1/40 , H04R3/00
摘要： PURPOSE:To prevent a side lobe from being generated from an ultrasonic wave (primary wave) radiated from plural ultrasonic wave vibrators and to improve the directivity by arranging lots of the ultrasonic wave vibrators in the middle and a few vibrators toward the circumference so that the sound pressure distribution of the ultrasonic wave is made close to the Gauss distribution. CONSTITUTION:Plural ultrasonic wave vibrators 1 are not arranged uniformly to a ultrasonic wave vibrator fixed member 2 as seen in a conventional system but many ultrasonic wave vibrators are arranged in the middle and less toward the circumference. In more details, the ultrasonic wave (primary wave) radiated from the plural ultrasonic wave vibrators 1 causes a sound pressure distribution close to the Gaussian distribution (so-called normal distribution) G in which side lobe is theoretically zero through the arrangement of the ultrasonic wave vibrators 1 at a narrow interval in the middle of the ultrasonic wave vibrator fixed member 2, that is, a dense state, and at a wider interval toward the circumference gradually, that is, a thin state. Through the configuration above, the production of a side lobe from the primary wave is prevented to improve the directivity, and then the directivity of the secondary wave caused from the primary wave is improved.

12. 发明专利

JPH03245085A TIME CASTING SOUND GENERATOR 失效
公开(公告)号：JPH03245085A
公开(公告)日：1991-10-31
申请号：JP4328090
申请日：1990-02-23
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： UENO YOSHIAKI , MIZUGUCHI KEIICHI
IPC分类号： G04C21/02 , G04G13/02 , G10K11/34 , G10L13/00 , H04R3/00
摘要： PURPOSE:To transmit time casting sound only to a specific user by a relatively small apparatus by generating a plurality of primary ultrasonic waves different in frequency and outputting audible sound having directionality by the interference of those primary ultrasonic waves. CONSTITUTION:When a signal forming part 6 receives an information signal from a clock part 5, the signal forming part 6 applies the modulation due to an audible signal of frequency Fm to a carrier wave signal of an ultrasonic wave of fundamental frequency Fo to input signals of frequency bands Fo+Fm/2 to a sound source 1. Primary sonic waves being ultrasonic waves of frequency bands Fo+Fm/2 are outputted from the sonic source 1 and a secondary sonic wave having audible frequency Fm is generated in a sound guide pipe 4 by the interference (parametric effect) of the primary sonic waves. This secondary sonic wave has high directionality similar to the primary sonic waves and changes in its direction by a reflecting surface 7 to be sent out to the outside from an aperture part 3. During this time, the secondary sonic wave is attenuated in its side lobe by a sound absorbing material 8 to hold high directionality and the primary sonic waves are also attenuated by the sound absorbing material 8 and limited from the send-out to the outside of a housing 2 by a filter 9 without obstructing interference effect.

13. 发明专利

JPH03129954A TWO-WIRE TYPE TELEVISION INTERPHONE SYSTEM 失效
公开(公告)号：JPH03129954A
公开(公告)日：1991-06-03
申请号：JP26664789
申请日：1989-10-15
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： AMANO MASAHIKO , TANIGAWA YOSHIHIRO , UENO YOSHIAKI , MIZUGUCHI KEIICHI
IPC分类号： H04N7/18 , H04M9/00
摘要： PURPOSE:To select a calling slave set and a master set going to make communication to be the communication available state of direct connection by providing a voice demodulation circuit and a voice detection circuit to a relay adaptor. CONSTITUTION:A relay adaptor 50 is provided with voice demodulation circuits 58a, 58b demodulating a talking voice signal from master sets 4a, 4b, voice detection circuits 59a, 59b detecting the presence of a talking voice signal from master sets 4a, 4b by a demodulation output of the voice demodulation circuits 58a, 58b and a control means like a CPU 53 controlling switching means SW3, SW4 so as to connect the master sets 4a, 4b, generating at first a talking voice signal to a call from slave sets 1a, 1b to the slave sets directly. Then the master sets 4a, 4b making a talking at first with a call from the slave sets 1a, 1b by detecting the talking voice signal are discriminated. Thus, the specific the master sets 4a, 4b going to make talking are connected directly to the slave sets 1a, 1b to be selected to the talking available state.

14. 发明专利

JPH0392768A VOLTAGE DETECTION CIRCUIT 失效
公开(公告)号：JPH0392768A
公开(公告)日：1991-04-17
申请号：JP22959789
申请日：1989-09-04
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： TANIGAWA YOSHIHIRO , MIZUGUCHI KEIICHI , UENO YOSHIAKI , AMANO MASAHIKO
IPC分类号： G01R19/00
摘要： PURPOSE:To achieve a higher accuracy by using a Zener diode as input resis tance of an operational amplifier. CONSTITUTION:A resistance R2 is connected between an inversion input terminal and an output terminal of an operational amplifier A1 and a resistance R2 between a non-inversion input terminal and a ground potential. Zener diodes D1 and D2 are connected in an opposite way between a pair of input terminals IN connected to a balance transmission path and the inversion and non-inversion input terminals respectively. Resistance values of the diodes D1 and D2 vary with a voltage between the terminals and reduces sharply near a Zener voltage VZ. Thus, an output voltage Vout changes sharply near 2xVZ of an input voltage Vin thereby enabling a highly accurate detection of voltage.

15. 发明专利

JPH0383445A SWITCHING TYPE INTERPHONE 失效
公开(公告)号：JPH0383445A
公开(公告)日：1991-04-09
申请号：JP22058989
申请日：1989-08-28
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： TANIGAWA YOSHIHIRO , MIZUGUCHI KEIICHI , UENO YOSHIAKI , AMANO MASAHIKO
IPC分类号： H04N7/18 , H04M9/00
摘要： PURPOSE:To prevent noise from being generated on the side of an entrance equipment when operation is executed to switch equipments by providing an internal power source on a switch, which selectively switches and connects one entrance equipment at least and the plural inhouse equipments, and supplying power of the internal power source to a transmission line connected to the entrance equipment when the operation is executed to switch the inhouse equipments. CONSTITUTION:In a switch K which switches and connects at least one of entrance equipments G1, G2 and one of plural inhouse equipments J1 and J2, a feeding circuit 56 is connected to the transmission line between relay contacts Ry1 and Ry2 connected to the entrance equipments G1 and G2 and relay contacts Ry3 and Ry4 connected to the inhouse equipments J1 and J2. For the feeding circuit 56, a direct current power source V is connected between the transmission lines through diodes D1 and D2 and the polarities of the diodes D1 and D2 are made inverse to direct current voltages on the transmission lines. The direct current voltage of the direct current power source V is set slightly lower than the direct current voltage on the transmission line. Thus, even when the operation is executed to switch the relay contacts Ry3 and Ry4 and a period is generated to lower the voltage between the lines by about 1.5msec, the voltage between the line is nor lower than the voltage of the direct current power source V and the uncomfortable noise is not generated on the side of the entrance equipment.

16. 发明专利

JPH0329584A 2-WIRE TV INTERHONE SYSTEM 失效
公开(公告)号：JPH0329584A
公开(公告)日：1991-02-07
申请号：JP16439289
申请日：1989-06-27
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： AMANO MASAHIKO , TANIGAWA YOSHIHIRO , UENO YOSHIAKI , MIZUGUCHI KEIICHI
IPC分类号： H04N7/18 , H04B3/00 , H04M9/00
摘要： PURPOSE:To select a slave set desired to be monitored with simple constitution by storing a slave set operated at the preceding monitor operation to select a slave set sending a video signal to the master set. CONSTITUTION:A control section 32 stores which of slave sets 1a... are in operation before in the standby state, that is, which of switches SW1, SW2 is thrown to the position of NO contact. every time the state of master sets 4a, 4b is operated from the operating state into the standby state or vice versa, the slave sets 1a, 1b to be started are replaced alternately. Thus, a video image displayed on a monitor television receiver 7 of the master sets 4a, 4b is not a video image of the slave sets 1a, 1b desiring to display the video image through the monitoring, the operation of the master set is once stopped and then the master sets 4a, 4b are again operated to display the video image of the slave sets 1a, 1b desiring to display the video image is displayed on a monitor television receiver 7 of the master sets 4a, 4b.

17. 发明专利

JPH0319473A VIDEO SIGNAL BRANCHING FILTER 失效
公开(公告)号：JPH0319473A
公开(公告)日：1991-01-28
申请号：JP15318689
申请日：1989-06-15
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： AMANO MASAHIKO , TANIGAWA YOSHIHIRO , UENO YOSHIAKI , MIZUGUCHI KEIICHI
IPC分类号： H04N7/18 , H04N5/00 , H04N7/10
摘要： PURPOSE:To reduce the attenuation of a video signal independently of the branch number or length of a branch line by connecting a high impedance resistor in series with the branch line and connecting a resistor having a resistance equivalent to a characteristic impedance of the line in parallel with the branch line. CONSTITUTION:A high impedance resistor R1 connects to a branch line 2 of a branching filter 3 branching a video signal from a trunk line 1 to the branch line 2 in a balanced type video signal transmission line and a resistor R1 having an impedance equivalent to a characteristic impedance Zo of the line is connected in parallel with the branch line 2. The impedance viewing the branching filter 3 from the trunk line 1 is high and the impedance viewing the branching fitter 3 from the branch line 2 is equal to the line characteristic impedance Zo. Thus, the attenuation of the video signal in the trunk line 1 is less and a stable signal transmission characteristic is obtained independently of the length of the branch line 2.

18. 发明专利

JPH02266742A TWO-WIRE TYPE TELEVISION INTERPHONE SYSTEM FOR MULTIPLE DWELLING HOUSE 失效
公开(公告)号：JPH02266742A
公开(公告)日：1990-10-31
申请号：JP8949889
申请日：1989-04-07
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： MIZUGUCHI KEIICHI , TANIGAWA YOSHIHIRO , UENO YOSHIAKI , AMANO MASAHIKO
IPC分类号： H04N7/18 , H04M9/00
摘要： PURPOSE:To construct an interphone system for multiple dwelling house in which the feature of a two-wire type television interphone system which becomes a fundamental can be utilized by using a required number of master machines, a relay adaptor, and a slave machine on which a call means is attached. CONSTITUTION:When a call button, for example, the call button 22 corresponding to the master machine 42 out of the call buttons 2 of the call signal generation circuit 17' of the slave machine 1 is operated, the call signal generation circuit 17' generates a call signal in which the master machine 42 is designated. The call signal is received by the call circuit 41 of the relay adaptor, and a master machine selection part 25 transmits the call to the master machine 42 by decreasing a standby voltage supplied from the master machine 42, and the master machine 42 is started up reacting according to the reduction of the voltage. In such a manner, the system for the multiple dwelling house can be constructed by using the two-wire type television interphone system which becomes the fundamental.

19. 发明专利

JPH02116283A VIDEO INTERPHONE SYSTEM 失效
公开(公告)号：JPH02116283A
公开(公告)日：1990-04-27
申请号：JP27012688
申请日：1988-10-26
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： TANIGAWA YOSHIHIRO , UENO YOSHIAKI , MIZUGUCHI KEIICHI
IPC分类号： H04N7/18 , H04M9/00
摘要： PURPOSE:To always make constant the potential difference between the input and output of a constant current circuit, and to form a highly reliable video interphone system without the restriction of a signal line length by driving a control circuit by output signal of a comparing circuit, and controlling the output voltage of a switching regulator. CONSTITUTION:The output voltage of a switching regulator 3 of a power source part D is controlled to a constant current by a constant current circuit 1, the potential difference between the input and output of the constant current circuit 1 is compared with a reference voltage by a comparing circuit 2, the output voltage of the switching regulator 3 is controlled by an output signal in the control circuit 4, and the potential difference between the input and output of the constant current circuit 1 is controlled so as to be always constant. Consequently, even when the length of a signal line (l) changes and a resistance component fluctuates, power consumed by the constant current circuit 1 is always constant, and inconvenience such as the increase of heat generation and the incapableness of the maintenance of the constant current can be canceled.

20. 发明专利

JPH0260358A INTERPHONE SYSTEM 失效
公开(公告)号：JPH0260358A
公开(公告)日：1990-02-28
申请号：JP21268988
申请日：1988-08-26
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： UENO YOSHIAKI , MIZUGUCHI KEIICHI , TANIGAWA YOSHIHIRO
IPC分类号： H04M9/00
摘要： PURPOSE:To prevent the output of an erroneous ringing tone due to the noise inputted to a microphone of a holding slave machine by turning on the switching circuit of a modulating part of the slave machine at the time of hooking off the handset of a master machine in response to the ringing tone. CONSTITUTION:When a visitor operates a call button SW, the modulated signal of a first carrier is transmitted to a master machine B through a signal line land the ringing tone is outputted from a speaker SPB. When a resident hooks off a handset H, a first tone signal and an audio signal are mixed and a second carrier is subjected to FM modulation and is transmitted to a slave machine A. The machine A demodulates and separates it, and the audio signal is outputted from a speaker SPA, and the first tone signal is decoded to turn on a switching circuit 1b. Thus, the audio signal from a microphone M subjects the first carrier to FM modulation and it is transmitted to the master machine B. Consequently, the circuit 16 is cut off to stop transmission of the audio signal from the microphone M to the master machine B unless the handset H is hooked off.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式