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LED driving device, multi-stage LED driving system and driving method

A technology of LED drive and drive circuit, which is applied to static indicators, instruments, etc., and can solve the problems of low reliability of multi-level LED drive systems

Active Publication Date: 2022-03-25
SHENZHEN GREEN WELLSPRING SEMICON TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The application provides an LED driving device, a multi-level LED driving system and a driving method, aiming to solve the problem of low reliability of the multi-level LED driving system in the related art

Method used

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  • LED driving device, multi-stage LED driving system and driving method
  • LED driving device, multi-stage LED driving system and driving method
  • LED driving device, multi-stage LED driving system and driving method

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the application more obvious and understandable, the following will clearly and completely describe the application in conjunction with the embodiments of the application and the corresponding drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. It should be understood that the various embodiments of the application described below are only used to explain the application, and are not intended to limit the application, that is, based on the various embodiments of the application, those skilled in the art will not make an inventive step. All other embodiments obtained under the premise of labor all belong to the protection scope of this application. In addition, the technical features involved in the various embodiments of the present application described below may be combined with each other as long as they do ...

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Abstract

The invention provides an LED driving device, a multi-stage LED driving system and a driving method. The LED driving device comprises a judgment circuit, a selection circuit, a driving circuit, a first transmission channel and a second transmission channel, the first transmission channel is used for transmitting a first display signal and acquiring a first signal segment from the first display signal; the second transmission channel is used for transmitting a second display signal and acquiring a second signal segment from the second display signal; the judgment circuit is used for judging whether the first display signal and / or the second display signal are / is abnormal or not and outputting a selection signal to the selection circuit according to a judgment result; the selection circuit is used for selecting the first signal segment or the second signal segment as a target signal segment according to a selection signal, and transmitting the target signal segment to the driving circuit; and the driving circuit is used for outputting a driving signal to the to-be-driven LED according to the target signal segment. According to the invention, the reliability of the multi-stage LED driving system can be effectively improved.

Description

【Technical field】 [0001] The present application relates to the technical field of LEDs, in particular to an LED driving device, a multi-stage LED driving system and a driving method. 【Background technique】 [0002] A multi-level LED (Light-Emitting Diode, light-emitting diode) driving system is usually applied to an LED display device including many LEDs, which generally includes a plurality of LED driving devices cascaded before and after, and each LED driving device is used to transmit display signals. And outputting a driving signal according to the transmitted display signal to drive corresponding at least one LED to emit light, thereby realizing the display function of the LED display device. [0003] In the related art, each LED driving device is connected to the ground through a ground wire, and connected to a power source through a power wire. When the power line and / or ground wire of the target LED driving device is open, and / or the interior of the target LED driv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32G09G2310/0264G09G2330/12Y02B20/40
Inventor 李家栋黄建东张青松
Owner SHENZHEN GREEN WELLSPRING SEMICON TECH
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