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A rechargeable led flashlight circuit with photosensitive dimming function

A technology of LED flashlight and charging circuit, applied in the direction of light source, electric light source, electrical components, etc., can solve the problems of LED driving current drift, lack of protection circuit, no brightness adjustment function, etc., and achieve the effect of preventing current drift

Inactive Publication Date: 2018-11-27
广东鼎能电器科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a rechargeable LED flashlight circuit with photosensitive dimming function, aiming to solve the problems of existing LED drive circuits such as single functionality, lack of protection circuit, no brightness adjustment function, and LED drive current drift.

Method used

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  • A rechargeable led flashlight circuit with photosensitive dimming function

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the content of the present invention, but not to limit the present invention.

[0023] The invention provides a rechargeable LED flashlight circuit with photosensitive dimming function, such as figure 1 As shown, it includes a charging circuit and a dimmable LED drive circuit, and it is characterized in that the charging circuit includes a rectification and step-down part, a battery part and a charging indicator part, and the working mode of the dimming circuit includes normal dimming mode and Photosensitive dimming mode.

[0024] The rectification step-down part is composed of AC power supply AC, discharge resistor R1, current limiting capacitor C1, and rectifier bridge D1-D4, wherein AC is...

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Abstract

The invention discloses a rechargeable LED flashlight circuit with photosensitive dimming function, which includes a charging circuit and a dimmable LED drive circuit, wherein the charging circuit includes a rectification and step-down part, a battery part and a charging indicator part. The working modes of the circuit include common dimming mode and photosensitive dimming mode. The rectification and step-down part can complete the charging function of the battery part, and can prevent the residual power of the plug from being discharged, and the charging indicator part can display the current charging state. In the normal dimming mode, people can adjust the LED light intensity by themselves. In the photosensitive dimming mode, the LED light intensity will be automatically adjusted according to the ambient brightness. An oscillation capacitor and a silicon controlled rectifier are set in the dimming circuit, which can prevent the line switch from suddenly closing and causing inrush current in the line to damage the lighting circuit; Current drift due to temperature rise.

Description

technical field [0001] The invention relates to an LED flashlight drive circuit, in particular to a rechargeable LED flashlight circuit with a light-sensitive dimming function. Background technique [0002] The flashlight is a household appliance commonly used in people's daily home life. The traditional flashlight uses an incandescent lamp as the light source, which consumes a lot of power and has a limited service life. [0003] As a new light source in the 21st century, LED has been widely used in flashlights. However, the existing LED flashlight drive circuit has problems such as single function, lack of protection circuit, no brightness adjustment function, and LED drive current drift. Moreover, although the existing flashlight has a charging function, when the plug is pulled out after the charging is completed, the remaining electricity on the plug will electrify people. Contents of the invention [0004] The invention provides a rechargeable LED flashlight circuit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/10Y02B20/30
Inventor 林泽亮
Owner 广东鼎能电器科技有限公司