TW201201621A - Power supply device of LED lamp - Google Patents

Abstract

A power supply device of an LED lamp is disclosed. It includes an isolation transformer used to transform a high voltage AC signal to a low voltage AC signal and thus to generate a driving voltage to drive the LED lamp. It further includes a wave shape and frequency modulation module disposed at the primary side of the isolation transformer for modulation of an input wave shape and a frequency f, which is ≥ 60Hz. It further includes a secondary rectifying filter module disposed at the secondary side of the isolation transformer for transforming the low voltage AC signal from the isolation transformer to the driving voltage. The driving voltage is a low voltage ripple signal and a peak to peak value of the low voltage ripple signal V is ≥ 1. Through the persistence of human vision, the voltage wave shape and frequency for driving the LED lamp can be modulated, and the LED lamp is kept under normal operation.

Description

201201621 VI. Description of the invention: [Technical field of invention] This creation is related to the field of power supply, especially regarding the use of the human eye vision persistence principle to modulate the voltage waveform and frequency of the LED to maintain it. Normal working LED lamp power supply unit. [Prior Art] Light Emitting Diode (LED) has the advantages of low voltage, low power consumption, and long life compared to conventional light sources. Therefore, LEDs have been widely used in various related fields where light sources are required in today's life. For example, a backlight module used in a display refers to a light source, a general lighting device, and the like. Among them, LED has a particularly significant energy-saving and power-saving advantage, so its practicality is particularly important in the most commonly used lighting purposes. The principle of the power supply of the traditional driving LED lamp is mainly to use the input high-voltage alternating current to rectify and chop the wave, convert it into low-voltage alternating current through the transformer, and then use the rectifier and the electrolytic electric device; the wave circuit is processed into The DC stabilized output is used to drive the corresponding LED lamp. However, the conventional method uses the large capacitance characteristic of the electrolytic capacitor to reduce the chopping condition, thereby achieving stable DC output. Because of the external factors, the environmental factors will affect the deterioration of the performance of the electrolytic capacitor. The life of the electrolytic grid is higher than that of other types of capacitors. The page is ugly and the temperature is in the environmental factor. The life of electrolytic capacitors is the most influential. For example, the high heat caused by chopping current is one of the reasons for 3 201201621. Due to the high heat, the performance of the electrolytic capacitor is accelerated, and the life and electrostatic capacity are shortened to only a fraction of the original. Thus, the function of the filter capacitor is equal to the loss of function. Therefore, the vertical LED lamp has a long life but can't effectively match the furnace's 'wave capacitance' of the same life. In view of this, the creator feels that he has tried his best to study it, and based on his accumulated experience in the industry for many years, he has developed a power supply device for LED lamps, mainly using the principle of human vision persistence. The modulation drives the voltage waveform and frequency of the LED so that it can still maintain normal operation. At the same time, since it is not necessary to convert the AC voltage into a stable DC output as in the prior art, it is necessary to use a long-lived non-electrolytic capacitor for filtering, and control any voltage waveform output to the LED lamp to be greater than or equal to 6 Hz, 涟The wave signal - peak to peak control is greater than or equal to volts. Or supplemented by feedback control to maintain the output within the working range, effectively driving the operation of the LED lamp' to improve the overall service life. SUMMARY OF THE INVENTION In view of the above problems, the purpose of the present invention is to provide a LED lamp power supply device that utilizes the human eye vision persistence principle to modulate the waveform and frequency of an LED house that is driven to maintain normal operation. In order to achieve the above objectives, the present invention proposes a power supply device for LED lamps, which mainly uses an isolation transformer to convert one of the input high-voltage AC signals into a low-voltage AC signal, thereby generating a driving voltage.

The driving I Ρ η , 咏 g AA hD luminaire includes: a waveform and frequency modulation module 201201621 group 'set on the primary side of the isolation transformer, for modulating an input waveform and a frequency f, and the frequency The 60 Hz; and the primary rectification filter module are disposed on the secondary side of the isolation transformer for converting the low voltage alternating current signal after the isolation transformer into the driving voltage, and the driving voltage is a low voltage chopping signal And one of the low voltage chopping signals has a peak-to-peak value of AVgl. The waveform and frequency modulation module includes a switching element and a PWM control circuit. The secondary rectification filter module includes a primary rectifier circuit and a primary filter circuit, and the secondary filter circuit has a non-electrolytic capacitor for improving the service life. For example, the non-electrolytic capacitor is a metal film capacitor or a Mylar capacitor. In order to continuously and stably output the driving voltage, the LED lamp power supply device of the present invention may further comprise: a feedback control module, which is disposed on the secondary side of the isolation transformer and connected to the secondary rectification filter module and is fed back The waveform and frequency modulation module of the primary side of the isolation transformer is controlled, wherein the feedback control module has a feedback circuit, an integration circuit and an optical coupler. In order to emphasize the effect of the post-variation voltage regulation, the LED lamp power supply device of the present invention may further comprise: a primary rectification filter module, which is disposed on the primary side of the isolation transformer and rectifies and filters the high-voltage AC signal. To the waveform and frequency modulation module. The effect of this creation is mainly to use the human eye vision persistence principle to modulate the voltage waveform and frequency of the LED to maintain the normal operation of 201201621. At the same time, since it is not necessary to convert the AC voltage into a stable DC output as in the prior art, it is necessary to use the non-electrolytic capacitor with a long life for filtering, and the frequency of any voltage waveform that is taken out to the LED lamp is controlled to be 60 Hz or more. One of the peaks of the wave signal is controlled to be 1 volt or more. Or supplemented by feedback control to maintain it within the scope of work to effectively drive LED lamps to improve overall service life. [Embodiment] In order to make your reviewer understand the content of this creation, please refer to the following description. s Qing, referring to Fig. 1 is a block diagram of the first preferred embodiment of the power supply for the LED lamp. As shown in the figure, the present embodiment provides an LED lamp power supply device 'mainly using an isolation transformer 2 to convert a high voltage alternating current signal into a driving voltage for driving the LED lamp, including: a waveform and frequency modulation Module 1 and primary rectification filter module 3. The waveform and frequency modulation module j is disposed on the secondary side of the isolation transformer 2 for modulating an input waveform with a frequency f, and the frequency is fg60 Hz. This waveform and frequency modulation module 1 can be used to drive the LED lamp 4 to any pulse waveform type. For example, a triangular wave, a rectangular wave (square wave) or a sine wave can be the driving voltage pulse waveform of the creation. The modulation of the frequency f 2 6 Hz is the effect that the human eye can reach the visual persistence. Therefore, when the input high-voltage alternating current is modulated by the waveform and the frequency modulation module 1 on the primary side, the voltage is converted into a 201201621 low-voltage alternating current signal via the isolating transformer 2. At this time, the low voltage alternating current signal is further converted into the driving voltage by the secondary rectification wave module 3'. The driving voltage is a low voltage chopping signal, and the peak-to-peak value ΔV 2 1 ' of the low-voltage chopping signal enables the LED lamp to be effectively driven to improve the overall service life. Please refer to FIG. 2 for a waveform change diagram of the first preferred embodiment of the LED lamp power supply device. As shown in the figure

P1 to P4 are voltage waveform diagrams that are modulated for each stage. Change with time' The P1 is the unmodulated high voltage. AC waveform; the P2 is modulated by the waveform and the frequency modulation module. The waveform and frequency modulation module 1 can include a switching element 1A and a PWM control circuit 12 (see Fig. 4). Thereby, the sine wave can be converted into a rectangular wave (square wave) waveform, and its duty cycle can be changed to control the output frequency f value to be f 2 60 Hz. The p3 is the low-voltage alternating current signal after the secondary side of the isolation transformer 2 is modulated; finally, the P4 is the waveform of the driving voltage after the modulation of the child-level rectifying filter module 3 is - Low voltage "waves m. Since the secondary rectification chopper module 3 is a DC output that makes the P3 waveform tend to be gentle but does not need to reach a stable fixed value, the secondary rectification filter module 3 is a 匕a-human rectifier circuit. 3〇 and the primary wave circuit 32, and the secondary wave system 32 has a non-electrolytic capacitor. Due to the long non-capacitance, the capacitance value is a phenomenon. However, through the human eye vision, the appropriate driving frequency f and the peak-solving electric power valley dance life are lower than the electrolysis power selection, which is easy to generate the principle of chopping. The chopping signal is 201201621. The peak value Δν is the creation. The driving voltage, which can effectively drive the leD lamp 4' without significantly stabilizing the output of the fixed DC voltage, greatly increases the life of the overall use. In addition, the non-electrolytic capacitor can be selected as a metal film capacitor or a Mylar capacitor. 4 picture). Can be found by the integration circuit 52

Isolation Transformer 2 - Refer to Fig. 3 is a block diagram of a second preferred embodiment of the present LED lamp power supply. Compared with the first embodiment, the present embodiment further includes a feedback control module 5 for continuously and stably outputting the driving voltage for effectively maintaining the driving of the LED lamp 4. The feedback control module 5 is disposed on the secondary side of the isolation transformer 2 and connected to the "Hai·human-level rectification filter module 3, and feedback-controls the waveform and frequency modulation mode of the primary side of the isolation transformer 2 Group 1β, wherein the feedback control module 5 can have a feedback circuit 5〇, an integration circuit 52, and a light combiner 5 4 (Spring photography m 4 m~ ^. The embodiment block is not intended. This embodiment In the second implementation, the additional-primary rectification filter module 6 is disposed on the 2-person side, and the high-voltage AC signal is rectified and filtered, and 201201621 is transmitted to the waveform and frequency modulation mode, group i. In order to emphasize the voltage regulation effect after the change, the same as the secondary rectifier chopper module 3, the primary rectification filter module "can include a primary rectifier circuit 6" and a primary filter circuit 62, and the primary The filter circuit 62 is provided with an electroless f-capacitor and the non-t solution capacitor can be - gold

Capacitance or - Mylar capacitor. The purpose of (4) selection is the same as that described above for the Z circuit 32, and details are not described herein again. In addition, the primary: the road 60 system can be a bridge rectifier, and the input high voltage parent flow signal is full-wave rectified and then filtered. As for the follow-up operation, it is the same as the first month of the _^ • consistent application, and it is not mentioned here. Modulation Γ:: E: The second is to use the human eye vision persistence principle and the constant voltage 及^ voltage waveform and frequency so that it can still maintain positive I for 13⁄4 day capture because there is no need to use the standard # to convert the AC voltage into Stabilizing the 'J' and using the long-lived non-electrolytic capacitor for the use of the wave, will take out 5 τ ^ paper, so the voltage of any LED waveform of the LED lamp is controlled at 60 Hz, one peak of the chopping signal The control is rotated within a range of 1 volt 牿屮 ^ ^ or more: it is controlled by feedback to maintain the service life. Effectively driving the operation of the LED lamp, improving the overall uselessness is only the preferred embodiment of the present invention, and making the equivalent or easy = the range 'so the u U ' under the scope of this technology is not separated The spirit of this creation and the patent _Z search change and modification 'should be covered by this creation 201201621 [Simplified description of the drawings] a preferred implementation - better implementation 2 preferred implementation of the first Figure 1, the power supply for the creation of LED lamps The block diagram of the first example. Fig. 2 is a waveform change diagram of the first example of the power supply of the LED lamp. Figure 3 is a block diagram showing the example of the power supply for the LED lamp. LED lamp power supply for the fourth picture, the block diagram of the creation example, the third preferred implementation of the device

[Main component symbol description]

1 Waveform and frequency modulation module 10 Switching element 12 PWM control circuit 2 Isolation transformer 3 Secondary rectifier wave module 30 Secondary rectifier circuit 32 Secondary filter circuit 4 Led lamp 5 Feedback control module 50 Feedback circuit 52 Integral circuit 54 Photocoupler 6 Primary rectification filter module 60 Primary rectification circuit 10 201201621 62 Primary filter circuit P1 ~ P4 Voltage waveform Δ V Peak-to-peak value

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Claims (1)

201201621 VII. Patent application scope: 1. A power supply device for LED lamps, which mainly uses an isolation transformer to convert a high-voltage alternating current signal into a low-voltage alternating current signal' to generate a driving voltage for driving the LED lamp, comprising: a waveform The frequency modulation module is disposed on the primary side of the isolation transformer for supplying an input waveform and a frequency f, and the frequency is 60 Hz; and the primary rectification filter module is disposed on the secondary side of the isolation transformer 'The low voltage alternating current signal after the isolation transformer is converted into the driving voltage' and the driving voltage is a low voltage chopping signal' and the peak of the low voltage chopping signal is peaked to the peak AVS1. For example, the LED lamp power supply device of the scope of the patent application, wherein the waveform and frequency modulation module' includes a switching element and a PWM control circuit. The LED lamp power supply device of any one of the claims or the second aspect, wherein the secondary rectification filter module comprises a secondary rectifier circuit and a primary filter circuit, and the secondary filter circuit has A non-electrolytic capacitor. 4 The LED lamp power supply device of the third aspect of the patent application, wherein the non-electrolytic capacitor is a metal film capacitor or a Mylar capacitor. 5. The LED lamp power supply device of the third application patent scope includes: a feedback control module, which is disposed on the secondary side of the isolation transformer 2 12 201201621 and connected to the secondary rectification filter module and feedback control The waveform and the frequency modulation module on the primary side of the isolation transformer. 6. The LED lamp power supply device of claim 5, wherein the feedback control module has a feedback circuit, an integrating circuit and an optical coupler. 7. The LED lamp power supply device of claim 5, further comprising: a primary rectification filter module disposed on the primary side of the isolation transformer and rectifying and filtering the high voltage alternating current signal to the waveform and frequency adjustment Variable module. The LED lamp power supply device of claim 7, wherein the primary rectification filter module comprises a primary rectifier circuit and a primary filter circuit, and the primary filter circuit has a non-electrolytic capacitor. 9. The LED lamp power supply device of claim 8 of the patent scope, wherein the non-electrolytic capacitor is a metal film capacitor or a Mylar capacitor. 10. For example, in the scope of application for patents, Beizhi LED lamp power supply device, wherein the rectifier circuit is a bridge rectifier. 13