CN106163028A - Light modulation method - Google Patents

Abstract

A dimming method comprises the following steps: driving the first driving module and the second driving module to enable the first light-emitting lamp group and the second light-emitting lamp group to respectively generate bright lights with the first brightness value and the second brightness value; and driving the first driving module and the second driving module to gradually change the brightness of the first light-emitting lamp group and the second light-emitting lamp group, wherein when the brightness of the first light-emitting lamp group and the second light-emitting lamp group reaches the brightness of a threshold value, the first driving module and the second driving module respectively drive the first light-emitting lamp group and the second light-emitting lamp group to generate the brightness with the same correction value.

Description

Dimming method

technical field

The invention is related to a dimming method; in particular, it refers to a dimming method for simultaneously controlling the brightness of a plurality of light-emitting lamp groups.

Background technique

With the advancement of science and technology, electrical equipment has more and more functions. Taking LED lighting system as an example, today's LED lighting system has the function of adjusting brightness and chromaticity in addition to simple control of opening and closing. Therefore, In addition to the original power circuit, there will also be an additional control circuit to transmit the control signal from the control panel on the wall to the LED module installed on the ceiling.

However, if more than two groups of LED modules are controlled at the same time, and after multiple adjustments, the brightness or chromaticity emitted by each group of LED modules will be different, and the brightness and color required by the user cannot be achieved. Spend.

Therefore, how to allow the user to adjust the required brightness and chromaticity every time the LED module is adjusted without changing the existing wiring, existing lamps or devices.

Contents of the invention

In view of this, the object of the present invention is to provide a dimming method that allows the user to adjust to the desired brightness every time the dimming is performed.

To achieve the above object, the dimming method provided by the present invention is applicable to a first light emitting lamp group and a second light emitting lamp group, wherein the first light emitting lamp group is driven by a first driving module to emit bright light, The second light emitting lamp group is driven by a second driving module to emit bright light, the first driving module stores a first brightness value, and the second driving module stores a second brightness value, the first brightness value is different from the first brightness value Two brightness values, the dimming method includes the following steps: a. Drive the first driving module and the second driving module, so that the first light emitting lamp group and the second light emitting lamp group respectively generate light with the first brightness value and The bright light of the second brightness value; and b. driving the first driving module and the second driving module, so that the first light emitting lamp group and the second light emitting lamp group gradually change the bright light of the brightness value, when the first light emitting When the light of the lamp group and the second light emitting lamp group reaches a threshold value, the first driving module and the second driving module respectively drive the first light emitting lamp group and the second light emitting lamp group to generate the same correction value bright light.

The effect of the present invention is to synchronously adjust each of the light-emitting lamp groups to the maximum brightness value or the minimum brightness, which can prevent the problem of inconsistent brightness of each of the light-emitting lamp groups due to multiple adjustments of the light of each of the light-emitting lamp groups

Description of drawings

In order to illustrate the present invention more clearly, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings, wherein:

FIG. 1 is a block diagram of an LED lighting system according to a first embodiment.

FIG. 2 is a flowchart of a dimming method according to a first embodiment of the present invention.

FIG. 3 is a block diagram of the LED lighting system of the second embodiment.

FIG. 4 is a flowchart of a dimming method according to a second embodiment of the present invention.

FIG. 5 is a block diagram of an LED lighting system according to a third embodiment.

FIG. 6 is a block diagram of an LED lighting system according to a fourth embodiment.

Fig. 7 is a circuit diagram of the waveform control module of the fifth embodiment.

Fig. 8 is a circuit diagram of the waveform control module of the sixth embodiment.

detailed description

Please refer to FIG. 1 , which is a block diagram of the LED lighting system of the first embodiment.

The LED lighting system 100 includes a waveform control module 10 , a first driving module 20 , a first light emitting lamp group 40 , a second driving module 30 and a second light emitting lamp group 50 .

The first light-emitting lamp group 40 and the second light-emitting lamp group 50 are installed on the wall or ceiling of the building (not shown), and each has a plurality of light-emitting diodes (not shown) to continuously receive electrical signals to The light emitting diodes are enabled to provide user illumination. The first light-emitting lamp group 40 and the second light-emitting lamp group 50 can produce bright light below the maximum brightness value under their rated power, and will adjust the bright light produced accordingly according to the difference in the magnitude or frequency of the received electrical signal brightness.

The waveform control module 10 is installed on the wall of the building. The waveform control module 10 includes a Zener diode ZD1 connected in parallel with a waveform control switch SW1. The waveform control switch SW1 is a normally closed button switch. The waveform control switch SW1 is in an open state when pressed by the user. A first end of the Zener diode ZD1 is electrically connected to a power source S (namely, mains power). A second terminal of the Zener diode ZD1 is electrically connected to the driving module. The first end of the Zener diode ZD1 is an anode, and the second end is a cathode. When the waveform control switch SW1 is turned off (open circuit), due to the voltage drop of the reverse collapse voltage of the Zener diode ZD1, the peak voltage of half of the wave decreases, and it will be judged as an output deformed waveform.

The waveform control switch SW1 is used for controlled short pressing and long pressing. Short press means that after the waveform control switch SW1 is turned off, it is quickly turned on again within 1.2 seconds to end the output of the deformed waveform. Long press refers to more than 1.2 seconds after the waveform control switch SW1 is cut off.

The first driving module 20 and the second driving module 30 can be integrated with the first lighting lamp group 40 and the second lighting lamp group 50 respectively, and installed on the wall or ceiling of the building together. The first driving module 20 and the second driving module 30 respectively include a detection circuit 22 , a programmable chip 24 and a power conversion circuit 26 . Taking the first driving module 20 as an example, the power conversion circuit 26 is electrically connected to the waveform control module 10 and the first light emitting lamp group 40, and is electrically connected to the power supply S through the waveform control module 10 for receiving The electric energy of the power supply S is converted into electrical signals, and supplied to the first light emitting lamp group 40 to drive the first light emitting lamp group 40 to generate bright light. Similarly, the second driving module 30 drives the second light emitting lamp group 40 to generate bright light. In this embodiment, the power conversion circuit 26 is designed on the basis of a pulse width modulation (Pulse Width Modulation, PWM) circuit, and adjusts the electrical signal supplied to each of the light emitting lamp groups by means of pulse width modulation. frequency width. Of course, in practice, the power conversion circuit 26 can also be designed to adjust the magnitude of the electrical signal or other electrical signal adjustment circuits.

The detection circuit 22 is electrically connected to the waveform control module 10 and the programmable chip 24, and is used to detect the time when the waveform control module 10 outputs the deformed waveform, so as to judge whether the user presses the waveform control switch SW1 short or long. And transmit the detection result to the programmable chip 24 . The programmable chip 24 is electrically connected to the power conversion circuit 26 and stores a full brightness mode, a full dark mode, a memory mode and a brightness adjustment mode. The programmable chip 24 controls the electrical signal output by the power conversion circuit 26 in one of the modes to drive each of the light emitting lamp groups to produce different levels of bright light, and uses the time when the detection circuit 22 detects the deformed waveform as a mode The basis for switching. Wherein, a first brightness value is pre-stored in the programmable chip 24 of the first driving module 20, a second brightness value is pre-stored in the programmable chip 24 of the second driving module 30, and the first brightness value is different from the Second brightness value.

FIG. 2 is a flowchart of a dimming method according to a first embodiment of the present invention.

The action of the full-brightness mode S110 is to generate bright lights with maximum brightness values for the first lighting lamp group 40 and the second lighting lamp group 50 . In the embodiment of the present invention, when the programmable chip 24 is in the full dark mode S130, short press the waveform control switch SW1, and the programmable chip 24 can enter the full bright mode S110 from the full dark mode S130.

The action of the memory mode S120 is that the first light-emitting lamp group 40 and the second light-emitting lamp group 50 respectively generate the bright lights of the first brightness value and the second brightness value stored in the programmable chip 24, if the first brightness value and the second luminance value are not covered by other luminance values, then the first light emitting lamp group 40 and the second light emitting lamp group 50 respectively generate bright lights of the first luminance value and the second luminance value. In the embodiment of the present invention, in the full-brightness mode S110, short press the waveform control switch SW1, and the programmable chip 24 enters the memory mode S120 from the full-brightness mode S110.

The action of the full-dark mode S130 is that the first lighting lamp group 40 and the second lighting lamp group 50 do not generate any bright light. In the embodiment of the invention, in the memory mode S120, short press the waveform control switch SW1, and the programmable chip 24 can enter the full dark mode S130 from the memory mode S120.

The action of the brightness adjustment mode S140 is to gradually change the brightness of the light of the first light emitting lamp group 40 and the second light emitting lamp group 50 until the light of the first light emitting lamp group 40 and the second light emitting lamp group 50 reaches a threshold value. When the light is bright, the first driving module 20 and the second driving module 30 respectively drive the first light emitting lamp group 40 and the second light emitting lamp group 50 to generate bright light with the same correction value. In the embodiment of the present invention, the threshold value and the correction value are the same brightness value, and the threshold value and the correction value are a maximum brightness value or a minimum brightness value. That is, when the bright light of the first light-emitting lamp group 40 and the second light-emitting lamp group 50 reaches the maximum brightness value from the first brightness value and the second brightness value respectively, the bright light of the maximum brightness value is maintained; When the value and the second brightness value reach the minimum brightness value, the bright light of the minimum brightness value is maintained.

In another embodiment, the action of the brightness adjustment mode S140 is that the bright lights of the first lighting lamp group 40 and the second lighting lamp group 50 go back and forth between the maximum brightness value and the minimum brightness value for a predetermined number of times, which is less Preferably, the predetermined number of times is five times, that is, the number of times of fading to the minimum brightness value after gradually brightening to the maximum brightness value is five times. Afterwards, when the threshold value is reached (the present invention is the maximum brightness value or the minimum brightness value), the first lighting lamp group 40 and the second lighting lamp group 50 maintain the correction value (the present invention is the maximum brightness value or the minimum brightness value). The bright light of the minimum brightness value). The purpose of setting five times is to allow the user to have multiple opportunities to select the desired brightness value. It is avoided that the brightness of the first and second light-emitting lamp groups 40 and 50 are not synchronized when the number of times is too high or the cycle continues.

In the embodiment of the invention, when the waveform control switch SW1 is pressed for a long time, the programmable chip 24 can enter the brightness adjustment mode S140 from any mode (ie full bright mode S110, full dark mode S130 or memory mode S120) , so as to adjust the brightness values of the first lighting lamp group 40 and the second lighting lamp group 50 . When the first light-emitting lamp group 40 and the second light-emitting lamp group 50 reach the bright light of one of the maximum brightness value and the minimum brightness value, the waveform control switch SW1 is turned on to stop the bright light of changing brightness value . When the waveform control switch SW1 is turned on, each programmable chip 24 respectively records the third luminance value and the fourth luminance value of the bright light currently generated by the first light emitting lamp group 40 and the second light emitting lamp group 50, And the recorded third brightness value and fourth brightness value replace the originally stored first brightness value and second brightness value. Afterwards, each of the programmable chips 24 enters the memory mode S120, and controls the electrical signals output by each of the power conversion circuits 26 to respectively drive the first light-emitting lamp group to generate the bright light of the third brightness value (that is, the new first brightness value), and the second light-emitting lamp group produces bright light with a fourth brightness value (that is, a new second brightness value). If the first and second light-emitting lamp groups 40 and 50 emit the bright light of the correction value (that is, the maximum brightness value or the minimum brightness value) at the same time, when the bright light of the third and fourth brightness values are respectively produced, the third brightness value is equal to the fourth brightness value.

The present invention adjusts the first light-emitting lamp group 40 and the second light-emitting lamp group 50 to the maximum brightness value or the minimum brightness synchronously through the brightness adjustment mode S140, which can prevent multiple adjustments of the first light-emitting lamp group 40 and the second light-emitting lamp group. The brightness of the second lighting lamp group 50 causes the problem that the brightness of the first lighting lamp group 40 and the second lighting lamp group 50 are inconsistent. In addition, through the brightness adjustment mode S140 , it is convenient for the user to adjust the required brightness.

Please refer to FIG. 3 , which is a block diagram of the LED lighting system of the second embodiment. The difference between the LED lighting system 200 of the second embodiment and the LED lighting system 100 of the first embodiment is that the LED lighting system 200 of the second embodiment uses a power switch PSW instead of the waveform control module. The power switch PSW is a toggle switch, which is controlled to be turned on and off within the predetermined time to output a pulse signal. In this embodiment, the set predetermined time is 1.2 seconds, that is, after the user cuts off the power switch PSW, it is quickly turned on again within 1.2 seconds to cause the waveform of the passing electric energy to change, then It will be judged as an output pulse signal. The detection circuit 22 of the first driving module 20 and the second driving module 30 outputs the pulse signal to detect whether the power switch PSW is quickly turned on or off. In addition, the programmable chip of the second embodiment stores the full-brightness mode, the memory mode, and the brightness adjustment mode, and the actions of each mode are the same as those described in the first embodiment, and will not be repeated here. Describe how the programmable chip of the light-emitting diode lighting system of the second embodiment enters each of the modes. Please also refer to Figure 4.

Full brightness mode S210 In the embodiment of the present invention, the power switch PSW is turned off for a long time, so that the first light emitting lamp group 40 and the second light emitting lamp group 50 are in a state of no light, and then the power switch is turned on After the PSW exceeds 1.2 seconds, the programmable chip enters the full-brightness mode S210 to make the first lighting lamp group 40 and the second lighting lamp group 50 generate bright lights with maximum brightness.

Memory Mode S220 In the embodiment of the present invention, when the programmable chip is in the full-brightness mode S210, and the power switch PSW is quickly turned off and on within 1.2 seconds to output a pulse signal, the programmable chip is turned from full-brightness to The mode S210 enters the memory mode S220, the first light emitting lamp group 40 and the second light emitting lamp group 50 respectively generate bright lights with the first brightness value and the second brightness value.

Brightness adjustment mode S230 In the embodiment of the present invention, when the programmable chip is in the memory mode S220, and the power switch PSW is quickly turned off and on within 1.2 seconds to output a pulse signal, the programmable chip is fully The bright mode S210 enters the brightness adjustment mode S230, and the actions of the first light emitting lamp group 40 and the second light emitting lamp group 50 are the same as the above-mentioned step S140 in FIG. 2 , and will not be repeated here.

Please refer to FIG. 5 , which is a block diagram of an LED lighting system according to a third embodiment. The difference between the LED lighting system 300 of the third embodiment and the LED lighting system 100 of the first embodiment is that the LED lighting system 300 of the third embodiment uses two sets of waveform control modules, which are respectively a first waveform control module 12 is connected in series with a second waveform control module 13 , and the first light emitting lamp group 60 and the second light emitting lamp group 70 respectively have a plurality of first light emitting diodes 62 and a plurality of second light emitting diodes 64 .

When pressing the waveform control switches SW2 and SW3 of the first waveform control module 12 and the second waveform control module 13 respectively, the output deformation waveforms are different, that is, the reverse bias voltages of the Zener diodes ZD2 and ZD3 are different. , and the half-wave (the negative half-wave in this embodiment) produces deformed waveforms with different peak voltages. The first driving module 20' and the second driving module 30' judge according to the deformed waveforms of different peak voltages that the user presses the waveform control switches SW2 and SW3 of the first waveform control module 12 or the second waveform control module 13, and It is judged whether the user presses or presses each of the waveform control switches SW2 and SW3 for a short time or a long time.

The light color of the first LED 62 is different from that of the second LED 64 . For example, the light color of the first light-emitting diode 62 is a cold light color system (such as white light, blue light, etc.), and the light color of the second light-emitting diode 64 is a warm light color system (such as yellow light, red light, etc. ).

In addition, the programmable chip of the third embodiment also stores a chromaticity adjustment mode in addition to the full-brightness mode, the full-darkness mode, the memory mode and the brightness adjustment mode.

The switching between the full bright mode, the full dark mode, the memory mode and the brightness adjustment mode performed by the first driving module 20' and the second driving module 30' according to the pressing condition of the first waveform control module 12, and The contents disclosed in FIG. 2 are the same, and will not be repeated here. The difference is that when the programmable chip is in the memory mode, press and hold the waveform control switch SW3 of the second waveform control module 13 to make the programmable chip store into the chromaticity adjustment mode, and change the first luminous lamp The brightness ratio of the first light-emitting diode 62 and the second light-emitting diode 64 in the group 60 and the second light-emitting lamp group 70, until the waveform control switch SW3 is turned on (that is, the user wants to use the current brightness ratio and set When the waveform control switch SW3 is turned on), record the current brightness ratio of the first light emitting diode 62 and the second light emitting diode 64, and continue to drive the first light emitting diode 62 and the second light emitting diode 64 to generate Bright light with new brightness scale. And the brightness ratio refers to the first light emitting lamp group 60, the brightness value of the bright light generated by the first light emitting diode 62 and the second light emitting diode 64 in the first light emitting lamp group 60 accounts for the current The ratio value of the brightness value of the bright light produced by the first light emitting lamp group 60, and the second light emitting lamp group 70 refers to the first light emitting diode 62 and the second light emitting diode in the second light emitting lamp group 70 The brightness value of the bright light generated by the diode 64 accounts for the ratio of the brightness value of the bright light generated by the second light-emitting lamp group 70 at the moment. For example, when the brightness value stored in the first driving module 20' is the first brightness value, The brightness ratio is the ratio of the brightness value of the bright light generated by the first light emitting diode 62 and the second light emitting diode 64 in the first light emitting lamp group 60 to the first brightness value; When the brightness value is the second brightness value, the brightness ratio is the ratio of the brightness value of the bright lights generated by the first LED 62 and the second LED 64 in the second light emitting lamp group 70 to the second brightness value.

Please refer to FIG. 6 , which is a block diagram of an LED lighting system according to a fourth embodiment. The difference between the LED lighting system 400 of the fourth embodiment and the LED lighting system 100 of the first embodiment is that the LED lighting system 400 of the fourth embodiment uses two sets of waveform control modules, each of which is composed of a first waveform control module 14 is connected in series with a second waveform control module 15 . The deformed waveforms output by the first waveform control module 14 and the second waveform control module 15 are different, that is, the peak voltages of the negative half waves caused by the Zener diodes ZD4 and ZD5 are different, wherein the second waveform control module 15 The waveform control switch SW5 is a changeover switch, and is usually in a conduction state. In addition, the programmable chip of the fourth embodiment also stores a fade-out mode in addition to the full-brightness mode, the full-darkness mode, the memory mode and the brightness adjustment mode.

The programmable chip switches between the full-brightness mode, the full-darkness mode, the memory mode and the brightness adjustment mode according to the pressing condition of the first waveform control module 14, and its switching action is the same as that disclosed in FIG. 2 The same, so I won't repeat them. The difference is that when the waveform control switch SW5 of the second waveform control module 15 is switched from the on state to the off state, and when the deformed waveform is output, the programmable chip enters the fading mode, and the action of the fading mode In order to drive the first driving module 20 and the second driving module 20, the first light-emitting lamp group 40 and the second light-emitting lamp group 50 gradually change from a state with bright light to a state without bright light within a set time. The setting time can be determined according to the space size of the area where the first light-emitting lamp group 40 and the second light-emitting lamp group 50 are installed. In a small space, it can range from 5 to 30 seconds, so that personnel have enough brightness and time to work. Leave the area where it is installed. When turning off the lights in large indoor spaces such as gymnasiums, museums, or concert halls, the setting time can be as long as several minutes to avoid problems caused by insufficient light when people have not left.

In the dimming mode, when the bright lights of the first lighting lamp group 40 and the second lighting lamp group 50 are gradually dimming, the waveform control switch SW5 of the second waveform control module 15 is switched from the cut-off state to the conduction state. state, the first light-emitting lamp group 40 and the second light-emitting lamp group 50 maintain the brightness value of the bright light generated at present.

FIG. 7 and FIG. 8 respectively show the waveform control modules 16 and 17 used in the fifth and sixth preferred embodiments, and the two waveform control modules 16 and 17 can be applied to the above-mentioned first to fourth embodiments.

The waveform control module 16 disclosed in FIG. 7 includes a waveform control switch SW6 connected in parallel with a resistor R6. When the waveform control switch SW6 is turned off, the waveform generated by the power supply passes through the resistor R6, and the voltage drop of the resistor R6 reduces the peak voltage of the positive half cycle and the negative half cycle of the waveform control module 17 outputting electric energy to form a deformed waveform. The waveform control module 17 disclosed in Fig. 7, in addition to effectively changing the waveform sent by the power supply into a deformed waveform, its deformed waveform can also maintain a sine wave with an average voltage value of zero, which is convenient for the drive module to control the deformed waveform. signal processing.

The difference between the waveform control module 17 shown in FIG. 8 and the waveform control module 16 shown in FIG. 7 is that the waveform control module 17 in FIG. 8 further includes a PN junction diode D7. The PN junction diode D7 is connected in parallel with the waveform control switch SW7, and a first end of the PN junction diode D7 is electrically connected to the power supply, and the first end is an anode. A second end of the PN junction diode D7 is electrically connected to the driving module, and the second end is a cathode.

When the waveform control switch SW7 is turned off, the positive half cycle of the sine wave generated by the power supply will be transmitted to the first driving module 20 and the second driving module 30 through the PN junction diode D7. The negative half cycle of the sine wave emitted by the power supply is transmitted to the driving module through the resistor R7. The waveform transmitted to the first driving module 20 and the second driving module 30 by the PN junction diode D7 and the resistor R7 is a deformed waveform. The design of the fourth embodiment can effectively change the sine wave sent by the power supply into a deformed waveform, and the positive half cycle of the deformed waveform is formed by passing through the PN junction diode D7, so there will be no energy loss, and more energy can be provided. Large electric energy is provided to the first driving module 20 and the second driving module 30 .

The above descriptions are only preferred feasible embodiments of the present invention, and all equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the claims of the present invention.

Claims (13)

1. a light-dimming method, is to be applied to one first electroluminescent lamp group and one second electroluminescent lamp group, wherein, This first electroluminescent lamp group is sent light by one first driving module drive, and this second electroluminescent lamp group is by one Second drives module drive to send light, and this first driving module stores one first brightness value, should Second driving module stores one second brightness value, and this first brightness value is different from this second brightness value, This light-dimming method comprises the following steps:

A, drive this first driving module and this second driving module, make this first electroluminescent lamp group and should Second electroluminescent lamp group produces the light with this first brightness value and this second brightness value respectively；And

B, drive this first driving module and this second driving module, make this first electroluminescent lamp group and should Second electroluminescent lamp group gradually changes the light of brightness value, when this first electroluminescent lamp group and this second electroluminescent lamp When the light of group reaches the light of a threshold values, this first driving module and this second driving module are driven respectively Move this first electroluminescent lamp group and this second electroluminescent lamp group produces the light with same corrected value.

2. light-dimming method as claimed in claim 1, wherein this threshold values and this corrected value are identical bright Angle value, and this threshold values and this corrected value be a maximum brightness value or a minimum luminance value.

3. light-dimming method as claimed in claim 1, wherein comprises, when this first in step b Light modulation group and this second electroluminescent lamp group, before reaching the light of this threshold values, stop changing this first luminescence Lamp group and the light of this second electroluminescent lamp group, this first driving module and this second driving module are remembered respectively Record this first electroluminescent lamp group and this instantly produced brightness value of the second electroluminescent lamp group and replace this first Drive the first brightness value stored by module and this second brightness value stored by module for second driving.

4. light-dimming method as claimed in claim 3, wherein in step b when this first electroluminescent lamp group and When the light of this second electroluminescent lamp group is toward a minimum luminance value change, stop changing this first electroluminescent lamp group And the light of this second electroluminescent lamp group, this first driving module and this second driving module record respectively respectively After the instantly produced brightness value of this electroluminescent lamp group, this first electroluminescent lamp group and this second electroluminescent lamp group by The light of instantly produced brightness value is toward the light change of a maximum brightness value.

5. light-dimming method as claimed in claim 3, wherein in step b when this first electroluminescent lamp group and When the light of this second electroluminescent lamp group is toward a maximum brightness value change, stop changing this first electroluminescent lamp group And the light of this second electroluminescent lamp group, this first driving module and this second driving module record respectively respectively After the instantly produced brightness value of this electroluminescent lamp group, this first electroluminescent lamp group and this second electroluminescent lamp group by The light of instantly produced brightness value is toward the light change of a minimum luminance value.

6. light-dimming method as claimed in claim 1, wherein this first electroluminescent lamp group and this second luminescence Lamp group includes at least one first light emitting diode and at least one second light emitting diode respectively, and respectively should First light emitting diode photochromic is different from the photochromic of each this second light emitting diode, and this light-dimming method is also Comprise the following steps: to change this first luminescence two in this first electroluminescent lamp group and this second electroluminescent lamp group Pole pipe and the brightness ratio of this second light emitting diode, and described brightness ratio refers to this first The brightness of light produced by this first light emitting diode and this second light emitting diode in light modulation group Value accounts for the ratio value of the brightness value of light produced by this first electroluminescent lamp group instantly, and this second The brightness of light produced by this first light emitting diode and this second light emitting diode in light modulation group Value accounts for the ratio value of the brightness value of light produced by this second electroluminescent lamp group instantly.

7. light-dimming method as claimed in claim 1, wherein in step b, when this first electroluminescent lamp The light of group and this second electroluminescent lamp group a maximum brightness value and between a minimum luminance value back and forth After one pre-determined number, and when reaching the light of this threshold values, this first driving module and this second driving Module drives this first electroluminescent lamp group and the generation of this second electroluminescent lamp group to have the bright of this corrected value respectively Light.

8. light-dimming method as claimed in claim 7, wherein this pre-determined number is five times.

9. light-dimming method as claimed in claim 1, also bag the following step: drive this first driving mould Block and this second driving module, make this first electroluminescent lamp group and this second electroluminescent lamp group in the setting time In, the state being had light by this is gradually changed into the state without light.

10. light-dimming method as claimed in claim 1, wherein in step b, first is driven by this Dynamic model block and this second driving module receive a deformation waveform of a waveform control module to drive respectively This first electroluminescent lamp group and this second electroluminescent lamp group produce the light gradually changing brightness value, wherein this ripple Shape control module includes a waveform control switch, when the control switch cut-off of this waveform, and this waveform control Molding block exports this deformation waveform, this waveform control module be electrically connected with a power supply, this deformation waveform its In the crest voltage of at least one half-wave less than the crest voltage of the corresponding half-wave of this power supply.

11. light-dimming methods as claimed in claim 10, wherein to include one steady for this waveform control module Pressure this waveform of diodes in parallel control switch.

12. light-dimming methods as claimed in claim 10, wherein this waveform control module includes an electricity Resistance this waveform in parallel control switch.

13. light-dimming methods as claimed in claim 12, wherein this waveform control module includes a PN Junction rectifier this waveform in parallel control switch.