CN204442789U - A lighting device and its driving module - Google Patents

Abstract

The utility model provides a lighting device and drive module thereof. The driving module is used for driving a light-emitting module of an alternating current lighting device. The light emitting module is provided with a plurality of light emitting diodes which are connected in parallel and have different color temperatures, and the driving module is provided with a detection unit, an oscillation unit and a control unit. The detecting unit is used for detecting a frequency of the alternating current. The oscillation unit is electrically connected with the detection unit and used for generating a clock pulse, wherein the oscillation unit corrects the clock pulse according to the frequency. The control unit is electrically connected with the oscillation unit and generates a plurality of control signals according to a power-off time between two times of switching of the two-segment switch to control the illumination state of at least one of the plurality of light-emitting diodes so as to switch a mixed color temperature of the light-emitting module.

Description

A lighting device and its driving module

technical field

The utility model relates to a lighting device and a driving module thereof, in particular to a lighting device with switchable color temperature and a driving module thereof.

Background technique

Lighting devices are an indispensable product in 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 also different. For example, bright and cool light may be required when reading in the living room, while soft and 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 light with different color temperatures to meet the different needs of users. A known lighting device with the function of switching color temperature usually needs to be equipped with its special control switch when consumers install it, and even the original wiring and decoration need to be changed, so it cannot be controlled by traditional wall switches, such as A simple two-stage switch. In addition, usually one switch needs to control multiple lighting devices in one lighting area, so it must be required that multiple lighting devices in the same lighting area can be switched to the same color temperature synchronously under the switching control of the same control switch.

To sum up, how to provide a lighting device and its driving module that can switch the color temperature by using a traditional two-stage switch is a goal that requires great efforts.

Utility model content

The utility model provides a lighting device and its drive module, which uses a control unit to generate a plurality of control signals to control the lighting state of at least one of a plurality of light-emitting diodes according to a power-off time between two switchings of a two-stage switch. , to switch a mixed color temperature of the light emitting module.

A lighting device according to an embodiment of the present invention is electrically connected to an alternating current. The lighting device includes a light emitting 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 includes a detection unit, an oscillation unit and a control unit. The detection unit is used to detect a frequency of the alternating current. The oscillating unit is electrically connected with the detecting unit for generating 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 the lighting state of at least one of the plurality of light-emitting diodes according to a power-off time between two switchings of a two-stage switch, so as to switch a mixed color temperature of the light-emitting module .

A driving module according to another embodiment of the present invention is used to drive a light emitting module of an AC lighting device, wherein the light emitting module has a plurality of light emitting diodes connected in parallel and having different color temperatures. The driving module has a detection unit, an oscillation unit and a control unit. The detection unit is used for detecting a frequency of the alternating current. The oscillating unit is electrically connected with the detecting unit for generating 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 the lighting state of at least one of the plurality of light-emitting diodes according to a power-off time between two switchings of a two-stage switch, so as to switch a mixed color temperature of the light-emitting module .

The following is a detailed description by means of specific embodiments in conjunction with the attached drawings, and it will be easier to understand the purpose, technical content, characteristics and achieved effects of the present utility model.

Description of drawings

In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a block diagram showing a lighting device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a driving module according to an embodiment of the present invention.

FIG. 3 is a schematic diagram showing a plurality of control signals of the driving module according to an embodiment of the present invention.

FIG. 4 is a flow chart showing that the driving module controls the lighting state of a light emitting module according to an embodiment of the present invention.

Symbol Description

10 drive module

12 detection unit

14 Oscillating unit

16 control unit

20 light emitting modules

22, 24 Light-emitting diodes

30 rectifier unit

AC alternating current

A1, A2 control signal

C capacitance

CK clock

F Frequency

I22, I24 current

P1～P6, Vin node

Detailed ways

The lighting device according to an embodiment of the present invention includes a driving module and a light emitting module, and the lighting device is electrically driven by an alternating current to provide lighting. Please refer to FIG. 1 , in an embodiment, the lighting device includes a driving module 10 , a light emitting 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 and 24 connected in parallel and having different color temperatures. For example, the light-emitting module 20 is composed of a light-emitting diode with a cool white temperature and a light-emitting diode with a warm white temperature connected in parallel, 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. The three light-emitting diodes are connected in parallel.

Please refer to FIG. 1 and FIG. 2 together. The driving module 10 includes a detection unit 12 , an oscillation unit 14 and a control unit 16 . By detecting an electrical signal at the node P4, the detection unit 12 can detect a frequency F of the corresponding alternating current AC. For example, the detection unit 12 detects the electrical signal of P4, and it can be known that the frequency of a mains power is 60 Hz. The oscillating unit 14 is electrically connected to the detection 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 a two-stage switch SW.

In particular, through the combination of the detection unit 12 and the oscillation unit 14, multiple lighting devices electrically controlled by the same two-stage switch SW in the same lighting area will use the AC frequency of the commercial power as the calibration standard, Synchronously correct the clock generated by the oscillation unit of each lighting device. With this circuit structure, the control unit of each lighting device can accurately calculate the power-off time between two switchings of the two-stage switch SW, without being affected by product variation between different lighting devices, and can achieve synchronous control of multiple lighting effect of the device. In one embodiment, the driving module 10 further includes a capacitor C for providing a power required for the operation of the driving module 10 during a power-off time.

Please refer 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 switchings of a two-stage switch SW to control at least one of the plurality of light-emitting diodes 22 and 24. An illumination state is used to switch a mixed color temperature of the light emitting module 20 . It should be noted that the power-off time between two switchings of the two-stage switch SW is the time for the user to turn off the two-stage switch SW during the operation of turning off the two-stage switch SW and then turning it on again in the open state. length. In one embodiment, the control unit 16 controls the lighting state to switch to a preset lighting state when the power-off time is greater than a specific time; and controls the lighting state to switch to a preset lighting 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 to control the input currents I22 and I24 of the cool white light emitting diode 22 and the warm white light emitting diode 24 to be 0 mA and 40 mA respectively when the power-off time is greater than 3 seconds, so that the light The module generates warm white light; the control unit 16 generates two control signals A1 and A2 to control the input currents I22 and I24 of the cool white light-emitting diode 22 and the warm white light-emitting diode 24 to be 40mA and 0mA respectively when the power-off time is less than 3 seconds. Make the light emitting module produce cool white light.

It can be understood that the control unit 16 also generates two control signals A1 and A2 to control the input currents I22 and I24 of the cool white light emitting diode 22 and the warm white light emitting diode 24 to be 20mA and 20mA respectively when the next power-off time is less than 3 seconds. , so that the light emitting module produces natural white light. That is, the lighting states of the cool white LEDs 22 and the warm white LEDs 24 include a preset lighting state, a first set lighting state and a second set lighting state, but not limited thereto. In one embodiment, the control unit 16 controls the magnitude of 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 lighting states is equal to maintain the brightness of the light-emitting module. Power consumption remains unchanged. In another embodiment, the lighting states of the LEDs may also include different preset lighting states and preset lighting states such as red light, green light, and blue light, but not limited thereto.

Referring to FIG. 4 , the operation of the driving module according to 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 lighting states of the plurality of LEDs according to the power-off time. In this embodiment, the control signals A1 and A2 are digital signals including two characters, such as A1<00>, A1<01>, A1<10>, A1<11> indicating the control signal A1 corresponding to different lighting states. In the embodiment of FIG. 3, the control signal A1<00> controls the input current I22 of the light emitting diode 22 to be 0mA, the control signal A1<01> controls the input current I22 of the light emitting diode 22 to be 40mA, and the control signal A1<1x> controls the light emission The input current I22 of the diode 22 is 20mA. For the convenience of description, the control signal A1<10> or A1<11> is abbreviated as the control signal A1<1x> here. By analogy, the same applies to the control signal A2, which will not be repeated here.

Continuing the above description, first, after the power is turned on via the two-stage switch, the control unit 16 generates control signals A1<00>, A2<00> to control the lighting state of the LED units 22, 24 to a preset lighting state; then, The control unit 16 generates control signals A1<01>, A2<01> when the power-off time is less than 3 seconds, and controls the lighting state of the LED units 22 and 24 to be a first set lighting state; again, the control unit 16 is turned off The power-on time is less than 3 seconds, and control signals A1<1x>, A2<1x> are generated to control the lighting state of the light-emitting diode units 22, 24 to a second set lighting state; The lighting status of the device returns to the original preset lighting status.

To sum up the above, the lighting device and its drive module 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 to illuminate state to switch a mixed color temperature of the light emitting module. In addition, through the combination of the detection unit and the oscillation unit, multiple lighting devices that are electrically controlled by the same two-stage switch in the same lighting area, use the AC frequency of the available mains power as the calibration reference, and calibrate each lighting device synchronously. The clock generated by the oscillator unit of the device. The control unit of each lighting device can accurately calculate the power-off time between two switchings of the two-stage switch, so as to achieve the effect of synchronously controlling multiple lighting devices.

Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

Claims (10)

1. a lighting device, is characterized in that, it is driven by an alternating current to provide illumination, and this lighting device comprises:

One light emitting module, it comprises parallel with one another and has multiple light-emitting diodes of different colour temperature; And

One driver module, it comprises:

One detecting unit, in order to detect a frequency of this alternating current;

One oscillating unit, itself and this detecting unit is electrically connected, and in order to produce a clock pulse, wherein this oscillating unit is according to this clock pulse of this frequency correction; And

One control unit, itself and this oscillating unit is electrically connected, and produce multiple control signal according to the power-off time between a two-section switch twice switching and control the plurality of light-emitting diode at least one of them illumination condition, to switch a mixing colour temperature of this light emitting module.

2. lighting device as claimed in claim 1, is characterized in that, also comprise an electric capacity, in order to provide the electric power needed for the operation of this driver module at this power-off time.

3. lighting device as claimed in claim 1, it is characterized in that, this driver module also comprises a rectification unit, and it is electrically connected to this alternating current, in order to this alternating current is converted to a direct current, to drive this light emitting module.

4. lighting device as claimed in claim 1, it is characterized in that, this control unit is also greater than a special time at this power-off time, control this illumination condition and switch to a default illumination condition, and be less than a special time at this power-off time, control this illumination condition and switch to a setting illumination condition.

5. lighting device as claimed in claim 4, it is characterized in that, this control unit, according to this power-off time, produces the plurality of control signal, to control the input current of each this light-emitting diode, make the plurality of light-emitting diode equal in the summation of the input current of different illumination condition.

6. a driver module, in order to drive a light emitting module of an alternating current lighting device, is characterized in that, this light emitting module has multiple light-emitting diodes of parallel with one another and different colour temperature, and this driver module comprises:

One detecting unit, in order to detect a frequency of this alternating current;

One oscillating unit, itself and this detecting unit is electrically connected, and in order to produce a clock pulse, wherein this oscillating unit is according to this clock pulse of this frequency correction; And

One control unit, itself and this oscillating unit is electrically connected, and produce multiple control signal according to the power-off time between a two-section switch twice switching and control the plurality of light-emitting diode at least one of them illumination condition, to switch a mixing colour temperature of this light emitting module.

7. driver module as claimed in claim 6, is characterized in that, also comprise an electric capacity, in order to provide the electric power needed for the operation of this driver module at this power-off time.

8. driver module as claimed in claim 6, it is characterized in that, also comprise a rectification unit, it is electrically connected to this alternating current, in order to this alternating current is converted to a direct current, to drive this light emitting module.

9. driver module as claimed in claim 6, it is characterized in that, this control unit is also greater than a special time at this power-off time, control this illumination condition and switch to a default illumination condition, and be less than a special time at this power-off time, control this illumination condition and switch to a setting illumination condition.

10. driver module as claimed in claim 9, it is characterized in that, this control unit, according to this power-off time, produces the plurality of control signal, to control the input current of each this light-emitting diode, make the plurality of light-emitting diode equal in the summation of the input current of different illumination condition.