Constant-voltage driven COB light source

A light source and low-voltage technology, which is applied in the field of constant voltage driving COB light sources, can solve the problems of no light, overcurrent of other LED light sources, etc., achieve installation and cost reduction, facilitate large-scale automatic production, and reduce thermal resistance of heat dissipation.

Pending Publication Date: 2020-01-10
FOSHAN EVERCORE OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, if the LED light source of the high-current LED drive power supply has an open circuit or short circuit fault, it will cause other LED light sources to appear overcurrent or not bright.

Method used

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  • Constant-voltage driven COB light source
  • Constant-voltage driven COB light source
  • Constant-voltage driven COB light source

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] see figure 1 , figure 1 It shows the specific structure of the constant voltage driving COB light source of the present invention, which includes a COB substrate and at least one set of light-emitting modules packaged on the COB substrate, each light-emitting module includes a one-to-one corresponding LED module 2 and a low-voltage A linear constant current chip 1; the LED module 2 includes at least one LED chip, and the LED chip and the low-voltage linear constant current chip 1 are integrally packaged on the COB substrate in a bare crystal manner; the LED module 2 The positive pole is connected to an external power supply, and the external power supply is used to provide a low-voltage DC power supply of 12-42V for the LED chip; the negative pole of the L...

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Abstract

The invention discloses a constant-voltage driven COB light source. The constant-voltage driven COB light source comprises a COB substrate and at least one group of light-emitting modules packaged onthe COB substrate, wherein each light-emitting module comprises an LED module and a low-voltage linear constant-current chip which are in one-to-one correspondence; each LED module comprises at leastone LED chip; the LED chips and the low-voltage linear constant-current chips are integrally packaged on the COB substrate in a die manner; the positive electrode of each LED module is connected withan external power supply; the external power supply is used for providing a 12-42V low-voltage direct-current power supply for the LED chips; the negative electrode of each LED module is connected inseries with the corresponding low-voltage linear constant-current chip; and the low-voltage linear constant-current chips are used for converting the low-voltage direct-current power supply output bythe external power supply into a constant-current power supply to drive the LED chips to work. By adopting the light source, the constant-voltage power supply output by the external power supply can be converted into the constant-current power supply, and the light-emitting modules are driven in a low-voltage linear driving mode, so that centralized use of a lamp is better facilitated.

Description

technical field [0001] The invention relates to the technical field of LEDs, in particular to a COB light source driven by constant voltage. Background technique [0002] In traditional LED applications, due to the nonlinear V-I characteristic of LED itself, it is necessary to drive the LED with a constant current power supply. If multiple groups of LED light sources are connected in parallel and share a high-current LED drive power supply, it will be extremely easy to cause uneven brightness of different groups of LED light sources. Moreover, the number of LED light source groups is not fixed, and the output current needs to be adjusted according to the number of LED light sources. At the same time, if the LED light source of the high-current LED driving power supply has an open-circuit or short-circuit fault, it will cause over-current or failure of other LED light sources. Therefore, each LED light source needs to be equipped with a constant current drive power supply f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21K9/20F21V23/00F21V19/00H05B45/345H05B45/10F21Y115/10
CPCF21K9/20F21V19/002F21V23/005F21Y2115/10
Inventor 王孟源曾伟强董挺波
Owner FOSHAN EVERCORE OPTOELECTRONICS TECH
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