公开(公告)号：EP3703468A1

公开(公告)日：2020-09-02

申请号：EP18871480.2

申请日：2018-05-18

申请人： Gong, Myeong-Kook ,  Gong, Da-Young

发明人： Gong, Myeong-Kook ,  Gong, Da-Young

IPC分类号： H05B33/08

摘要： The present invention presents an LED lighting device for preventing flickering. The device comprises: a rectification unit receiving an alternating current voltage applied from an alternating current power source and rectifying the same so as to output a direct current; a first light-emitting unit receiving the direct current applied thereto and adjusting a first constant current so as to make a first LED array emit light; a second light-emitting unit receiving the adjusted first constant current applied thereto and adjusting a second constant current so as to make a second LED array emit light; and a serial switching unit receiving the direct current and the adjusted first and second constant currents applied thereto so as to control current transmission according to the opening/closing of a plurality of embedded transistors, wherein the direct current and the first constant current, which are to be applied, are applied by passing through first and second diodes, respectively.

公开(公告)号：EP4131248A1

公开(公告)日：2023-02-08

申请号：EP21780140.6

申请日：2021-01-29

申请人： Gong, Myeong-Kook ,  Gong, Da-Young

发明人： Gong, Myeong-Kook ,  Gong, Da-Young

IPC分类号： G10D9/035

摘要： The present invention relates to a head joint for a wind instrument, having a mouthpiece and a reed portion, and a wind instrument comprising same and, more particularly, to a head joint for a wind instrument, having a mouthpiece and a reed portion, and a wind instrument comprising same, the head joint allowing for an extended range of one octave lower, i.e. extended lower notes, than the range of a two-side-open wind instrument by adding the range of a one-side-open wind instrument, which is played through a reed, to the range of a two-side-open wind instrument which only has a mouthpiece.
The head joint for a wind instrument, having a mouthpiece and a reed portion, according to the present invention has a tubular shape having one end closed, wherein the mouthpiece and the reed portion are formed, so as to be spaced apart from each other, at a certain distance from the end.

公开(公告)号：EP3952614A1

公开(公告)日：2022-02-09

申请号：EP19922752.1

申请日：2019-12-31

申请人： Gong, Myeong-Kook ,  Gong, Da-Young

发明人： Gong, Myeong-Kook ,  Gong, Da-Young

IPC分类号： H05B45/345 ,  H05B45/44 ,  H05B45/50

摘要： Disclosed is an AC source direct driving LED lighting device. The device comprises: a light emitting unit which has a first electrolytic capacitor and receives a rectified alternating current (AC) voltage to adjust a first constant current and emits an LED array; a charging/discharging unit which receives the adjusted first constant current to be adjusted to second to fourth constant currents and charges/discharges second to fourth electrolytic capacitors embedded therein, respectively; a discharge LED path unit which forms a path through which a voltage charged in the charging/discharging unit is discharged to the light emitting unit; and a current driving unit which receives the adjusted first to fourth constant currents to form first to fourth channel using first to fourth reference voltages and controls current transfer.