公开(公告)号：US11805580B2

公开(公告)日：2023-10-31

申请号：US17942689

申请日：2022-09-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Deokhee Han ,  Sangcheol Bong ,  Hyunjung Kim ,  Jongkwan Lee ,  June Jang ,  Minsoo Han

IPC: H05B45/325 ,  H05B45/10 ,  H05B45/46

CPC classification number: H05B45/10 ,  H05B45/325 ,  H05B45/46

Abstract: A light emitting diode (LED) driving device is provided. The LED driving device includes a rectifier configured to generate a rectified voltage, wherein the rectifier is directly connected to an input node of a light source including LEDs; a regulator configured to output a direct current (DC) power supply voltage using the rectified voltage; a microcontroller including a control terminal and a power terminal, wherein the microcontroller is configured to generate a dimming control signal based on a voltage input, receive the DC power supply voltage through the power terminal and output the dimming control signal through the control terminal; a driver configured to control an LED current to flow through the LEDs based on the dimming control signal; and a switch connected between a control node and a ground node, wherein an output terminal of the regulator and the control terminal are connected to the control node.

公开(公告)号：US11882634B2

公开(公告)日：2024-01-23

申请号：US17380854

申请日：2021-07-20

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Deokhee Han

IPC: H05B45/46 ,  H05B45/325 ,  H05B45/375 ,  H05B45/10 ,  H05B45/20

CPC classification number: H05B45/46 ,  H05B45/10 ,  H05B45/20 ,  H05B45/325 ,  H05B45/375

Abstract: A light emitting diode (LED) lighting apparatus is provided. The LED lighting apparatus includes a first LED array; a second LED array; a first driving chip configured to receive AC power, and to control the first LED array based on a first control signal; a second driving chip configured to receive the AC power, and to control the second LED array based on a second control signal; a communication device configured to generate the first control signal and the second control signal based on a request from an external device; and an AC/DC converter configured to receive the AC power, and to provide DC power to the communication device.

公开(公告)号：US11528787B2

公开(公告)日：2022-12-13

申请号：US16895175

申请日：2020-06-08

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Deokhee Han ,  Hyunjung Kim

IPC: H05B45/24 ,  H05B47/21 ,  F21S4/26 ,  F21Y115/10

Abstract: A light-emitting circuit includes first and second light-emitting element strings respectively configured to emit light having a first and second color temperatures; a rectifying circuit configured to rectify a voltage, input by an alternating current (AC) power source, to generate a driving voltage; a string switching circuit configured to select at least one light-emitting element string to be used for light emission from among the first light-emitting element string and the second light-emitting element string; an off/on sensing circuit configured to change a selection of the string switching circuit to change a color temperature of light, which is emitted by the light-emitting circuit, when the AC power source is turned off and then turned on; and a driving circuit configured to turn on, in turn, light-emitting elements in the selected at least one light-emitting element string, according to a change in the driving voltage over time.