Integrator , LED current ripple elimination circuit and method, LED driver and LED equipment

A technology of current ripple and integrator, which is applied in the field of LED current ripple elimination circuit, LED driver and LED equipment, and integrator, can solve the problems of high cost and complicated circuit structure, and achieve system cost reduction, simple circuit structure, Effect of Simplification of Peripheral Circuits

Active Publication Date: 2017-12-01
SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies of the above-mentioned related technologies, the purpose of this application is to disclose an integrator, LED current ripple elimination circuit, LED current ripple elimination method, LED driver, LED driver chip and LED equipment, which are used to solve the problems in the related technology. Problems such as complex circuit structure, high cost and high risk of failure

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  • Integrator , LED current ripple elimination circuit and method, LED driver and LED equipment
  • Integrator , LED current ripple elimination circuit and method, LED driver and LED equipment
  • Integrator , LED current ripple elimination circuit and method, LED driver and LED equipment

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[0044] The implementation of the present application will be described by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification.

[0045] In the following description, reference is made to the accompanying drawings, which illustrate several embodiments of the application. It is to be understood that other embodiments may be utilized, and mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description should not be considered limiting, and the scope of the embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for describing particular embodiments only and is not intended to limit the application. Spatially relative terms such as "upper", "lower", "left", "right", ...

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Abstract

The application discloses an integrator, an LED current ripple elimination circuit and method, a LED driver and LED equipment; the integrator comprises the following units: a voltage comparison module used for receiving an input voltage and a reference voltage, comparing the two voltages, and outputting a corresponding logic signal according to the comparison result of the two; a counting module used for counting the logic signals outputted by the voltage comparison module so as to form a digit control signal; a digital analog conversion module used for carrying out digital analog conversion for the digit control signal outputted by the counting module, thus forming an analog control signal. Compared with the prior art using a difference amplifier and a filtering capacitor, the integrator is simple in circuit structure, higher in integrated level, and can especially omit the large filtering capacitor, thus simplifying the peripheral circuit, reducing the system cost, and thoroughly eliminating the failure problems caused by the peripheral filtering capacitor.

Description

technical field [0001] The present application relates to the technical field of LED driving, in particular to an integrator, an LED current ripple elimination circuit and method, an LED driver and an LED device. Background technique [0002] LED (Light Emitting Diode, Light Emitting Diode) is used in a variety of electronic applications, such as: architectural lighting, automotive head and tail lights, backlights and flashes of liquid crystal display devices including personal computers and high-definition televisions, etc. LEDs have significant advantages over conventional light sources such as incandescent and fluorescent lamps, including high efficiency, good directionality, color stability, high reliability, long life, small size, and environmental safety. [0003] LEDs are current-driven devices, therefore, adjusting the drive current through the LED is an important control technique. The LED drive power supply needs to meet some requirements, for example: it can be u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/40H05B45/00H05B45/37
Inventor 江儒龙郜小茹
Owner SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD
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