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Constant-current control circuit structure applied to high-power LED device

A technology of constant current control circuit and LED device, applied in energy-saving control technology, electric lamp circuit arrangement, electric light source, etc., to achieve the effects of stable working performance, good luminous efficiency, and simple circuit structure design

Active Publication Date: 2016-05-18
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for such high-power and ultra-high-power LED devices, there is no effective constant current control technology that can maintain stable working performance.

Method used

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  • Constant-current control circuit structure applied to high-power LED device

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Embodiment Construction

[0018] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] As mentioned above, in view of the shortcomings of the existing high-power LED device control methods, the present invention provides a constant current control circuit structure applied to high-power LED devices, which includes LED devices, and the LED devices include parallel settings A plurality of light-emitting unit groups, each light-emitting unit group is also connected in series with a constant current functional component, the constant current fu...

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Abstract

The invention discloses a constant-current control circuit structure applied to a high-power LED device. The constant-current control circuit structure comprises an LED device including a plurality of light-emitting unit groups arranged in parallel; each light-emitting unit group includes at least one light-emitting unit, wherein the light-emitting units are connected in series; a constant-current function assembly is connected in series in each light-emitting unit group and is used for enabling working currents of light-emitting unit groups to be equal. Furthermore, the circuit structure also includes an A / D module, a D / A module, and a control module. The A / D module is used for collecting a current value in each light-emitting unit group and a forward voltage drop of the light-emitting unit; the D / A module is used for outputting control signals to a voltage-stabilizing power supply module and the constant-current function assembly, thereby adjusting the working voltage and / or working current of the LED device. According to the invention, the structure is simple; assembling is easy; and the cost is low; precise and real-time voltage-stabilizing and constant-current control of a high-voltage or extra-high-votlage LED device can be realized; and the working performance is stable and the luminous efficiency is high.

Description

technical field [0001] The invention belongs to the field of LED driving and relates to the constant current and temperature control of high-power and large-area LEDs. Background technique [0002] The first LED product was born in the United States in the 1960s. Its appearance has brought a lot of brilliance to people's lives. Due to the advantages of LEDs such as long life, low power consumption, and environmental protection, related technologies have developed very rapidly. . It has become a "ubiquitous" optoelectronic device and light source that is closely related to our lives, such as the backlight of mobile phones, traffic lights, large-screen full-color display screens and lights for landscape lighting, etc. [0003] Generally speaking, existing LED devices usually include several chipsets arranged in parallel, and each chipset includes several LED chips arranged in series. . However, due to the differences in the resistance of each LED chip in each chip group, if...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 徐飞蔡勇时广轶张亦斌
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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