TWM505767U - Lighting device and driving module - Google Patents

Description

Lighting device and driving module thereof

The present invention relates to a lighting device and a driving module thereof, in particular to a lighting device capable of switching color temperature and a driving module thereof.

Illumination devices are an indispensable product in a civilized life, providing the light needed for user activities. Depending on the nature of the activity, the color temperature of the light required by the user is different. For example, bright and cool white warm light may be required when reading in the living room, while soft and warm white warm light may be required when resting in the living room. That is to say, in the same space, it is often necessary to switch the light of different color temperatures to meet the different needs of users. A conventional lighting device with a function of switching color temperature is usually installed with a special control switch or even a need to change the original line and decoration when the consumer installs, and cannot be controlled by a conventional wall switch, for example, Simple two-stage switch. In addition, usually one switch needs to control a plurality of illumination devices in one illumination area, so it is necessary to require a plurality of illumination devices in the same illumination area to be synchronously switched to the same color temperature under the switching control of the same control switch.

In summary, how to provide a lighting device and its driving module that can switch the color temperature using the traditional two-stage switch is the goal that is currently in great demand.

The present invention provides a lighting device and a driving module thereof, which utilizes a control unit to generate a plurality of control signals to control at least one of the plurality of light-emitting diodes according to a power-off time between two switches of two-stage switches. State to switch the color temperature of one of the lighting modules.

A lighting device according to an embodiment of the present invention is electrically connected to an alternating current. The lighting device comprises a lighting module and a driving module. The light emitting module includes a plurality of light emitting diodes connected in parallel and having different color temperatures. The driving module comprises a detecting unit, an oscillating unit and a control unit. The detection unit is used to detect one frequency of the alternating current. The oscillating unit is electrically connected to the detecting unit to generate a clock, wherein the oscillating unit corrects the clock according to the frequency. The control unit is electrically connected to the oscillating unit, and generates a plurality of control signals to control at least one of the plurality of illuminating diodes according to a power-off time between the two switches of the two-stage switch to switch the illuminating module. A mixed color temperature.

A driving module of another embodiment of the present invention is configured to drive a light emitting module of an alternating current lighting device, wherein the light emitting module has a plurality of light emitting diodes connected in parallel and at different color temperatures. The driving module has a detecting unit, an oscillating unit and a control unit. The detecting unit is configured to detect one frequency of the alternating current. The oscillating unit is electrically connected to the detecting unit to generate a clock, wherein the oscillating unit corrects the clock according to the frequency. The control unit is electrically connected to the oscillating unit, and generates a plurality of control signals to control at least one of the plurality of illuminating diodes according to a power-off time between the two switches of the two-stage switch to switch the illuminating module. A mixed color temperature.

In the following, the specific embodiments and the accompanying drawings are explained in detail, and it is easier to understand the purpose, technical content, characteristics and effects achieved by the present invention.

The lighting device of one embodiment of the present invention comprises a driving module and a lighting module, and the lighting device is electrically driven by an alternating current to provide illumination. Referring to FIG. 1 , in an embodiment, the illumination device includes a driving module 10 , a lighting module 20 , and a rectifying unit 30 . The rectifying unit 30 is electrically connected to the alternating current AC for converting the alternating current AC into a direct current (not shown) to drive the light emitting module 20 . The light-emitting module 20 includes a plurality of light-emitting diodes 22, 24 that are connected in parallel with each other and have different color temperatures. For example, the light-emitting module 20 is composed of a light-emitting diode having a cool white temperature and a light-emitting diode having a warm white temperature, or the light-emitting module 20 is composed of a red light-emitting diode. A green light-emitting diode and a blue light-emitting diode are formed in parallel with each other.

Referring to FIG. 1 and FIG. 2 , the driving module 10 includes a detecting unit 12 , an oscillating unit 14 and a control unit 16 . By detecting one of the electrical signals of the node P4, the detecting unit 12 can detect a frequency F of the corresponding alternating current AC. For example, the detecting unit 12 detects the electrical signal of the P4, and can know that the frequency of a commercial power is 60 Hz. The oscillating unit 14 is electrically connected to the detecting unit 12 for generating a clock CK, and the oscillating unit 14 corrects the clock CK according to the frequency F. The control unit 16 is electrically connected to the oscillating unit 14 for calculating a power-off time between two switchings of the two-stage switch SW.

In particular, by using a combination of the detecting unit 12 and the oscillating unit 14, a plurality of illuminating devices electrically controlled by the same two-stage switch SW in the same illumination area can use the AC frequency of the commercial power as a calibration reference. The clock generated by the oscillating unit of each illuminating device is synchronously corrected. With this circuit architecture, the control unit of each lighting device can accurately calculate the power-off time between two switches of the two-stage switch SW, without being affected by product variations between different lighting devices, and can simultaneously control multiple lightings. The effect of the device. In one embodiment, the driving module 10 further includes a capacitor C for providing one of the power required for the operation of the driving module 10 during the power-off time.

Referring to FIG. 2 and FIG. 3 together, the control unit 16 generates a plurality of control signals A1 and A2 according to a power-off time between two switches of the two-stage switch SW, and controls the plurality of light-emitting diodes 22 and 24 to at least One of the illumination states is to switch the color temperature of one of the illumination modules 20. It should be noted that the power-off time between the two-switch SW switching is the time when the user turns off the two-stage switch SW during the operation of turning off the two-stage switch SW in the open state. length. In an embodiment, the control unit 16 controls the illumination state to switch to a preset illumination state when the power-off time is greater than a specific time; and controls the illumination state to switch to a set illumination state when the power-off time is less than a specific time. For example, the control unit 16 generates two control signals A1 and A2 when the power-off time is greater than 3 seconds, so as to control the input currents I22 and I24 of the cool white LEDs 22 and the warm white LEDs 24 respectively. 0 mA and 40 mA, the light-emitting module generates warm white light; the control unit 16 generates two control signals A1 and A2 during the power-off time of less than 3 seconds to control the cool white light-emitting diode 22 and the warm white light-emitting diode The input currents I22 and I24 of the body 24 are 40 mA and 0 mA, respectively, so that the light-emitting module produces cool white light.

It can be understood that the control unit 16 generates two control signals A1 and A2 at the next power-off time of less than 3 seconds to control the input currents I22 and I24 of the cool white LEDs 22 and the warm white LEDs 24. The size is 20 mA and 20 mA, respectively, so that the lighting module produces natural white light. That is, the illumination states of the cool white LEDs 22 and the warm white LEDs 24 include a predetermined illumination state, a first set illumination state, and a second set illumination state, but are not limited thereto. In an embodiment, the control unit 16 controls the input currents I22 and I24 of the LEDs 22 and 24 according to the power-off time, so that the sum of the input currents of the LEDs 22 and 24 in different illumination states is equal. In order to maintain the power consumption of the lighting module. In another embodiment, the illumination state of the LED may also include different preset illumination states such as red, green, and blue light, and set illumination states, but not limited thereto.

Referring to FIG. 4, the operation of the driving module of an embodiment of the present invention will be described below. The control unit 16 generates a plurality of control signals A1 and A2 to control the illumination states of the plurality of light-emitting diodes according to the power-off time. In this embodiment, the control signals A1 and A2 are digital signals including two characters, for example, A1<00>, A1<01>, A<10>, and A<11> indicate control signals A1 corresponding to different illumination states. In the embodiment of FIG. 3, the control signal A1<00> controls the input current I22 of the LED 22 to be 0 mA, and the control signal A1<01> controls the input current I22 of the LED 22 to be 40 mA, and the control signal is controlled. A1<1x> controls the input current I22 of the LED 22 to be 20 mA. For convenience of explanation, the control signal A1<10> or A1<11> is abbreviated as the control signal A1<1x>. And so on, the control signal A2 is also the same, and will not be described here.

Following the above description, first, after the power is turned on by the two-stage switch, the control unit 16 generates control signals A1<00> and A2<00>, and controls the illumination states of the LED units 22 and 24 to be a preset illumination state; Then, the control unit 16 generates the control signals A1<01> and A2<01> when the power-off time is less than 3 seconds, and controls the illumination states of the LED units 22 and 24 to be a first set illumination state; again, the control unit 16 when the power-off time is less than 3 seconds, generating control signals A1<1x>, A2<1x>, controlling the illumination state of the LED units 22, 24 to be a second set illumination state; finally, turning the switch on after turning off, The illumination state of the illumination module will be restored to the original preset illumination state.

In summary, the lighting device and the driving module thereof of the present invention use a control unit to generate a plurality of control signals according to a power-off time between two switchings of a two-stage switch, and control at least one of the plurality of light-emitting diodes. An illumination state to switch the color temperature of one of the illumination modules. In addition, by using a combination of the detecting unit and the oscillating unit, a plurality of illuminating devices electrically controlled by the same two-stage switch in the same illumination area can use the AC frequency of the commercial power as a calibration reference to simultaneously correct each illumination. The clock generated by the oscillating unit of the device. The control unit of each lighting device will accurately calculate the power-off time between two switches of the two-stage switch to achieve the effect of synchronously controlling a plurality of lighting devices.

The embodiments described above are only for explaining the technical idea and characteristics of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement them according to the scope of the patent. That is, the equivalent changes or modifications made by the people in accordance with the spirit revealed by this creation should still be covered by the scope of the patent of this creation.

10‧‧‧Drive Module
12‧‧‧Detection unit
14‧‧‧Oscillation unit
16‧‧‧Control unit
20‧‧‧Lighting module
22, 24‧‧‧Lighting diode
30‧‧‧Rectifier unit
AC‧‧‧AC
A1, A2‧‧‧ control signals
C‧‧‧ capacitor
CK‧‧‧ clock
F‧‧‧frequency
I22, I24‧‧‧ current
P1~P6, Vin‧‧‧ nodes

1 is a block diagram showing a lighting device of an embodiment of the present invention. 2 is a block diagram showing a driving module of an embodiment of the present invention. FIG. 3 is a schematic diagram showing a plurality of control signals of the driving module of an embodiment of the present invention. 4 is a flow chart showing the driving state of an illumination module controlled by a driving module according to an embodiment of the present invention.

10‧‧‧Drive Module

12‧‧‧Detection unit

14‧‧‧Oscillation unit

16‧‧‧Control unit

A1, A2‧‧‧ control signals

P1, P2, P4‧‧‧ nodes

Claims (10)

A lighting device is driven by an alternating current to provide illumination, the lighting device comprising: a lighting module comprising a plurality of light emitting diodes connected in parallel with different color temperatures; and a driving module comprising: a detecting unit for detecting a frequency of the alternating current; an oscillating unit electrically connected to the detecting unit for generating a clock, wherein the oscillating unit corrects the clock according to the frequency; and a control a unit electrically connected to the oscillating unit, and generating a plurality of control signals to control at least one of the plurality of illuminating diodes according to a power-off time between two switches of the two-stage switch to switch the One of the lighting modules mixes the color temperature. The lighting device of claim 1, further comprising a capacitor for providing power required for operation of the driving module during the power-off time. The lighting device of claim 1, wherein the driving module further comprises a rectifying unit electrically connected to the alternating current for converting the alternating current into a direct current to drive the lighting module. The lighting device of claim 1, wherein the control unit further controls the lighting state to switch to a predetermined lighting state when the power-off time is greater than a specific time, and controls the lighting time to be less than a specific time. The illumination state is switched to a set illumination state. The lighting device of claim 4, wherein the control unit generates the plurality of control signals according to the power-off time to control an input current of each of the light-emitting diodes, so that the plurality of light-emitting diodes are different The sum of the input currents in the illumination state is equal. A driving module for driving an illuminating module of an ac lighting device, wherein the illuminating module has a plurality of illuminating diodes connected in parallel and different color temperatures, the driving module comprises: a detecting unit, Detecting a frequency of the alternating current; an oscillating unit electrically connected to the detecting unit for generating a clock, wherein the oscillating unit corrects the clock according to the frequency; and a control unit, and the oscillating The unit is electrically connected, and generates a plurality of control signals according to a power-off time between the two switches of the two-stage switch to control at least one of the illumination states of the plurality of light-emitting diodes to switch one of the illumination modules to be mixed. Color temperature. The driving module of claim 6, further comprising a capacitor for providing one of the power required for the operation of the driving module during the power-off time. The driving module of claim 6, further comprising a rectifying unit electrically connected to the alternating current for converting the alternating current into a direct current to drive the lighting module. The driving module of claim 6, wherein the control unit further controls the lighting state to switch to a predetermined lighting state when the power-off time is greater than a specific time, and controls the power-off time to be less than a specific time. The illumination state is switched to a set illumination state. The driving module of claim 9, wherein the control unit generates the plurality of control signals according to the power-off time to control an input current of each of the light-emitting diodes, so that the plurality of light-emitting diodes are The sum of the input currents of different illumination states is equal.