LED display driving circuit, display, driving method and driving chip

A display driver and circuit technology, applied in static indicators, instruments, etc., can solve problems such as burnout of LED lamp beads, and achieve the effect of reducing power consumption, preventing large current from flowing into LED, and being very practical.

Pending Publication Date: 2019-06-07
CHIPONE TECH BEIJINGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Long-time high brightness will cause the LED lamp beads to burn out

Method used

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  • LED display driving circuit, display, driving method and driving chip
  • LED display driving circuit, display, driving method and driving chip
  • LED display driving circuit, display, driving method and driving chip

Examples

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Embodiment Construction

[0041] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...

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PUM

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Abstract

The invention provides an LED display driving circuit, a display, a driving method and a driving chip, and the circuit comprises a reference current source which is used for generating a reference current; a current mirror which comprises an input branch and an output branch, is connected with the reference current source and is used for amplifying the reference current; and a switch module whichis connected with the input branch circuit and the output branch circuit, and is used for acquiring the state signal of the reference current and realizing the control of the input branch circuit andthe output branch circuit according to the state signal. According to the LED display driving circuit, the display, the driving method and the driving chip, large current can be effectively preventedfrom flowing into an LED, and therefore the service life of the LED is guaranteed.

Description

technical field [0001] The invention relates to the technical field of LED display driving, in particular to an LED display driving circuit, a display, a driving method and a driving chip. Background technique [0002] LED (Light Emitting Diode, Light Emitting Diode) is a semiconductor device sensitive to voltage characteristics and has negative temperature characteristics, so it needs to be in a stable working state and protected during application. LED devices have certain requirements for driving power, and the power supply voltage is usually between DC 3-24V. [0003] Under normal circumstances, the operating current of the LED is between 5 and 20mA. When a large current greater than 20mA flows through the LED, the LED display area will appear bright. Long-time high brightness will cause the LED lamp beads to burn out. Contents of the invention [0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
Inventor 唐永生王勇王景帅
Owner CHIPONE TECH BEIJINGCO LTD
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