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An LED display drive device based on a PSoC

A technology of LED driving and programming system, which is applied in the direction of lighting devices, static indicators, instruments, etc., and can solve problems such as complex hardware circuit structure, inability to meet precision requirements, and large control steps

Inactive Publication Date: 2018-01-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The hardware circuit structure is relatively complex, and there are many peripheral devices on the control chip
[0007] 2. The control step is relatively large, which cannot meet the occasions that require high precision

Method used

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  • An LED display drive device based on a PSoC
  • An LED display drive device based on a PSoC

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Embodiment Construction

[0019] In order to facilitate a further understanding of the structure of the present invention, the present invention will be described in detail below in conjunction with examples.

[0020] The device is composed of a sampling circuit (1), a controller (2), and an LED drive circuit (3), such as figure 1 . Its connection relationship is:

[0021] The driving current output by the LED driving circuit is connected to the input of the sampling circuit; the output of the sampling circuit is directly connected to the PSoC; the output of the PSoC is directly connected to the control terminal of the driving circuit.

[0022] In the example, the controller uses Cypress's programmable system-on-chip (PSoC) CY8C29466, which integrates microprocessors, memories, high-density logic circuits, analog and hybrid circuits, and other circuits on one chip to form a signal A system for acquisition, conversion, storage, and I / O processing functions.

[0023] The internal setting block diagram...

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PUM

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Abstract

The invention relates to the field of optical display and illumination, and discloses an LED drive device for providing a uniform driving current for LED displaying. As for occasions with a large LEDdisplay area and high requirements for luminescence uniformity, the PSoC is adopted to carry out brilliance control to reach a purpose of uniform luminescence. The device is composed of a sampling circuit (1), a controller (2) and an LED driving circuit (3). The advantages of multiple functions of the PSoC are used to make the control circuit have characteristics of being simple in structure, small in size, easy to implement and independent of other external devices. The device of the invention solves the problem of relatively complex circuits in the prior art and realizes accurate control ofthe LED display brightness.

Description

technical field [0001] The invention relates to the field of light display and illumination, in particular to an LED display driving device for providing uniform driving current for LED display. Background technique [0002] In various display and lighting systems, due to the advantages of high brightness, low voltage, low power consumption, energy saving and environmental protection, LEDs have been widely used in various places and become the main force of display and lighting. At the same time, LEDs are also developing towards higher luminous brightness, better luminous uniformity and greater luminous density. For high-brightness LEDs, in order to increase the brightness and prolong the service life, it is necessary to ensure a stable current drive to achieve a high uniformity of light emission. Therefore, the driving device used must have a more precisely controlled ability. [0003] A simple LED drive device for high-brightness LEDs can only guarantee a constant curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32H05B33/08H05B44/00
Inventor 高原杨昕梅杨承唐普英李绍荣
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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