US 12,137,502 B2
Linear driving module
Che-Min Kung, Zhubei (TW); Ching-Ran Lee, Jinning Township, Kinmen County (TW); Shi-Wei Huang, Taichung (TW); and Wen-Tien Tsai, Liuqiu Township, Pingtung County (TW)
Assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed by INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed on Dec. 9, 2022, as Appl. No. 18/078,347.
Claims priority of application No. 111146019 (TW), filed on Nov. 30, 2022.
Prior Publication US 2024/0179812 A1, May 30, 2024
Int. Cl. H05B 45/14 (2020.01); H05B 45/3725 (2020.01); H05B 45/48 (2020.01)
CPC H05B 45/14 (2020.01) [H05B 45/48 (2020.01); H05B 45/3725 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A linear driving module adapted to be used in a lamp, comprising:
a control circuit, for generating a plurality of switch signals in response to a change of a pulsed DC voltage;
a dimming module, having a module voltage drop and receiving the pulsed DC voltage, the dimming module comprising:
N dimming units connected in series, wherein each of the N dimming units comprises: a light-emitting diode unit being in a light-on state or a light-off state in response to the switch signals, wherein the module voltage drop varies with a number of the light-emitting diode units in the light-on state in the N dimming units; and
a low-dropout regulator, electrically connected to the dimming module, for receiving an input voltage generated by the dimming module according to the pulsed DC voltage and the module voltage drop and converting the input voltage into a regulated voltage, wherein the input voltage is lower than the pulsed DC voltage, the regulated voltage is lower than the input voltage, and N is a positive integer.