KR20200121772A
|
|
Techniques of delivery of public address in accordance with decision factor related to monitoring environment
|
KR102230790B1
|
|
Contact point line communication for monitoring of information in public address system
|
KR102230799B1
|
|
Technique of configuring information for communication through contact point line in public address system
|
KR102221124B1
|
|
Protocol conversion between heterogeneous devices in network-based public address system
|
KR102154702B1
|
|
Smart public address system for delivery of device information via contact point line
|
KR102097278B1
|
|
Smart public address system
|
KR20210008456A
|
|
multi-level Class D amplifier of low voltage-stress
|
KR102187126B1
|
|
connecting device of line checker
|
KR102134338B1
|
|
rack mount adapter of half mount type
|
KR102026294B1
|
|
BOMB sound removal device by use of soft-start of SMPS for DC-type line checking of PA broadcasting
|
KR102015332B1
|
|
on-operation over-current protection device by use of hysteresis OP amp comparator for PA broadcasting
|
KR102015329B1
|
|
fault detection device by use of hall sensor and electronic load for speaker lines of emergency broadcasting
|
KR102015326B1
|
|
speaker line checker device based on parallel connection of large-capacity variable resistors for emergency broadcasting
|
KR102015324B1
|
|
speaker line checker device based on series connection of fuse and variable resistor for emergency broadcasting
|
KR102032353B1
|
|
current sensing based method of providing speaker line short protection for emergency broadcasting
|
KR20200084269A
|
|
Event detection-based public address system
|
KR102107965B1
|
|
Light emitting diode dot matrix display panel, method for driving the same and display device including the same
|
KR20190100007A
|
|
Techniques for network-based audio source broadcasting of selective quality using voip
|
KR101919918B1
|
|
Technique for preventing overload of audio amplifier
|
KR101921083B1
|
|
Techniques for network-based audio source broadcasting of selective quality
|