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Control module for automatically adjusting LED working voltage and control method thereof

A technology of LED module and working voltage, which is applied in the direction of electric light source, electric lamp circuit arrangement, lighting device, etc., to achieve the effect of improving service life

Inactive Publication Date: 2014-09-10
CHANGZHOU TOPIC SEMICON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a control module suitable for automatically adjusting the LED working voltage, which solves the technical problem of self-adaptive control of the LED module when the input voltage fluctuates

Method used

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  • Control module for automatically adjusting LED working voltage and control method thereof
  • Control module for automatically adjusting LED working voltage and control method thereof
  • Control module for automatically adjusting LED working voltage and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] like figure 1 As shown, a control module suitable for automatically adjusting the LED working voltage includes:

[0020] A plurality of self-adaptive control units connected in parallel with each LED module group, wherein a plurality of LED lamp beads are arranged in the LED module group, and several LED module groups are connected in series; Logic control unit controlled by voltage detection unit.

[0021] The adaptive voltage detection unit is used to collect the output voltage of the series LED module group, and according to the output voltage Uo and the upper limit reference voltage V REF1 or lower limit reference voltage V REF2 comparison to obtain a control signal for controlling the logic control unit.

[0022] A logic control unit, which adopts a shift register unit U1, which is adapted to perform left shift or right shift according to the control signal and sequentially output high level or low level to control the adaptive control unit to turn on or Turn o...

Embodiment 2

[0031] like figure 1 and figure 2 As shown, embodiment 2 based on embodiment 1 is a control method for a control module suitable for automatically adjusting the LED operating voltage, wherein the control module includes: several self-adaptive Control unit, adaptive voltage detection unit, logic control unit.

[0032] The control methods include:

[0033] The adaptive voltage detection unit collects the output voltage of the series LED module group, and according to the output voltage Uo and the preset upper limit reference voltage V REF1 or lower limit reference voltage V REF2 comparison to obtain a control signal for controlling the logic control unit.

[0034] The logic control unit adopts a shift register unit U1, which is suitable for shifting left or right according to the control signal and sequentially outputting high level or low level to control the adaptive control unit to be turned on or off , so that the corresponding LED module group goes out or lights up. ...

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PUM

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Abstract

The invention relates to a control module for automatically adjusting LED working voltage and a control method thereof. The control module comprises a plurality of LED module groups connected in series, wherein a plurality of LED lamp beads, a plurality of self-adaptation control units respectively in parallel connection with the LED module groups, a self-adaptation voltage detection unit and a logic control unit controlled by the self-adaptation voltage detection unit are arranged in the LED module groups. The control module accurately obtains comparison voltage through the self-adaptation voltage detection unit and is matched with the logic control unit to achieve LED module regulation and control, namely when the input voltage rises, multiple LED module groups are connected to the module to enable corresponding voltages of LED control circuits to rise, and when the input voltage is reduced, a plurality of LED module groups can be subjected to short circuit, the corresponding voltages of the LED control circuits can be reduced so as to achieve self-adaptation control.

Description

technical field [0001] The invention relates to the field of LED control, in particular to a control module for automatically adjusting LED working voltage and a control method thereof. Background technique [0002] At present, the use of light-emitting diodes (LEDs) is becoming more and more popular, and users have put forward higher and higher requirements for them. Among them, the heating problem of MOS tubes has been paid more and more attention because it involves safety and LED service life. [0003] At present, several LEDs are used to build an LED module, and a switch tube is used to control the dot matrix. Due to fluctuations in the voltage of the external network, the voltage at both ends of the switch tube will fluctuate, causing the switch tube to be overloaded and heated, and even damaged. [0004] In the Chinese patent literature, the announcement number 202503745U discloses the "LED working voltage control device", which proposes a LED driving method in which...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 张永良唐振宇
Owner CHANGZHOU TOPIC SEMICON TECH
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