公开(公告)号：WO2018234091A1

公开(公告)日：2018-12-27

申请号：PCT/EP2018/065448

申请日：2018-06-12

Applicant: PHILIPS LIGHTING HOLDING B.V.

Inventor： DE BONDT, Guy, Louis, Paul ,  ZIJLMAN, Theo, Gerrit ,  SAUERLÄNDER, Georg

IPC: H05B33/08 ,  H02M1/00

Abstract: An AC input power converter comprising a rectifier circuit (D3, D4, D5, D6) for rectifying an AC input signal, a first unidirectional device (D1) coupled in series with a first capacitor (C1) for charging the first capacitor (C1) and wherein the first unidirectional device (D1) and the first capacitor (C1) are arranged in parallel to an output of the rectifier circuit (D3, D4, D5, D6), a second unidirectional device (D2) coupled in series with a second capacitor (C2) for charging the second capacitor (C2) and wherein the second unidirectional device (D2) and the second capacitor (C2) are arranged in parallel to an output of the rectifier circuit (D3, D4, D5, D6), a first output (OUT1) for providing a first power and a first average voltage to a first power converter, wherein the first output (OUT1) is coupled to a first node between the first capacitor (C1) and the first unidirectional device (D1) and a second output (OUT2) for providing a second power and a second average voltage to a second power converter, wherein the second output (OUT2) is coupled to a second node between the second capacitor (C2) and the second unidirectional device (D2), wherein the first capacitor (C1) has a first value and the second capacitor (C2) has a second value, and wherein the first value of the first capacitor and the second value of the second capacitor are selected such that when the first power is lower than the second power, the first average voltage is larger than the second average voltage, and when the first power is larger than the second power, the first average voltage is lower than the second average voltage.

公开(公告)号：WO2018228858A1

公开(公告)日：2018-12-20

申请号：PCT/EP2018/064717

申请日：2018-06-05

Applicant: PHILIPS LIGHTING HOLDING B.V.

Inventor： ZIJLMAN, Theo, Gerrit ,  HONTELE, Bertrand, Johan, Edward ,  KAHLMAN, Henricus, Marius, Joseph, Maria

IPC: H05B33/08

Abstract: The invention provides a method and apparatus for overcoming LED flicker caused by an asynchronous control of an LED on or off state and a switched-mode power supply for the LED. There is provided a supplementary control system adapted to override a primary control system for the switched-mode power supply, and control an energy storage inductor of the switched-mode power supply. In particular, in response to an indicated desire to switch the LED on, the supplementary control system sets the current in the energy storage inductor to a predetermined level. In this way, when the LED is switched on, the current through the inductor is known and LED flicker is thereby reduced.

公开(公告)号：WO2018184888A1

公开(公告)日：2018-10-11

申请号：PCT/EP2018/057625

申请日：2018-03-26

Applicant: PHILIPS LIGHTING HOLDING B.V.

Inventor： ZIJLMAN, Theo, Gerrit ,  HONTELE, Bertrand, Johan, Edward ,  KAHLMAN, Henricus, Marius, Joseph, Maria ,  YANG, Hannah, M

IPC: H05B33/08 ,  H05B37/02

Abstract: An LED lighting driver has a switched mode power supply which generates an auxiliary power supply. The auxiliary power supply has a dummy load, and a control circuit for controlling the connection of the dummy load in parallel with the auxiliary load in dependence on the current drawn by the auxiliary load. In this way, a current drawn by the auxiliary load is made more stable so that effects of auxiliary supply fluctuations on the light output are reduced.

公开(公告)号：WO2018189032A1

公开(公告)日：2018-10-18

申请号：PCT/EP2018/058765

申请日：2018-04-05

Applicant: PHILIPS LIGHTING HOLDING B.V.

Inventor： ZIJLMAN, Theo, Gerrit ,  HONTELE, Bertrand, Johan, Edward ,  KAHLMAN, Marius, Joseph, Maria ,  LUO, Zhijun ,  YANG, Min

IPC: H05B33/08 ,  H02M1/00 ,  H02M3/00

Abstract: An LED lighting driver has a switched mode power supply which generates an auxiliary power supply. The auxiliary power supply circuit has a first power supply inductor and a second power supply inductor in series with each other. The second power supply inductor is selectively switched into or out of the auxiliary power supply circuit, thereby varying a transformer ratio to the main energy storage inductor. The switching may be made 5 based on a light output mode or a standby mode being in operation. The standby mode then enables more efficient generation of an auxiliary supply voltage.

公开(公告)号：WO2017182266A1

公开(公告)日：2017-10-26

申请号：PCT/EP2017/057988

申请日：2017-04-04

Applicant: PHILIPS LIGHTING HOLDING B.V.

Inventor： VAN KAATHOVEN, Dirk, Jan ,  ZIJLMAN, Theo, Gerrit ,  VAN DER HAM, Marcel ,  DE JONG, Lambertus, Adrianus, Marinus

IPC: H05B33/08

Abstract: A lighting control circuit is for controlling a lighting arrangement comprising a set of at least two light sources in parallel. A current driver is used to deliver a drive current to the lighting arrangement. A switch is associated with the second light source, which may for example be provided for color adjustment, and the duty cycle of the switch is controlled as well as the overall drive current setting thereby to control the color or color temperature setting and dimming level of the lighting arrangement. The controller derives the required average output current and the expected average output voltage from the current driver based on the determined duty cycle and the dimming level, and then derives the current driver setting. In this way, the current driver is accurately controlled to deliver the required output. This enables a single stage driver to be used to control the color or color temperature of multiple light source channels, for example in dependence on a dimming level.

Abstract translation: 照明控制电路用于控制包括并联的一组至少两个光源的照明装置。 电流驱动器用于向照明装置传送驱动电流。 开关与第二光源相关联，其例如可以被提供用于颜色调节，并且控制开关的占空比以及整体驱动电流设置，从而控制颜色或色温设置和调光水平 照明装置。 控制器基于所确定的占空比和调光水平来从电流驱动器导出所需的平均输出电流和预期的平均输出电压，并且然后导出当前的驱动器设置。 这样，当前的驱动器被精确控制以提供所需的输出。 这使得单级驱动器能够用于例如根据调光水平来控制多个光源通道的颜色或色温。