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Control method for controlling bipolar LED lamps by using max7219

A technology of LED lamp and control method, applied in the direction of energy-saving control technology, electrical components, electroluminescent light source, etc., can solve the problem of inability to control bipolar LED lamp, etc., and achieve the effect of simple control

Active Publication Date: 2020-02-04
TOEC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since max7219 uses forward and reverse voltage difference to realize the control of LED on and off, under normal circumstances max7219 cannot control bipolar LED lights

Method used

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  • Control method for controlling bipolar LED lamps by using max7219
  • Control method for controlling bipolar LED lamps by using max7219

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Embodiment Construction

[0020] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

[0022] In the embodiment of the present invention, a max7219 controller is used for bipolar LED lamps, such as figure 2 As shown, X1~X8 are the chip selec...

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Abstract

The invention discloses a control method for controlling bipolar LED lamps by using max7219. The control method comprises the steps that a single-chip microcomputer controls the max7219 through SPI (DSPIN / DSPCS / DSPCK); a chip selection pin, which is connected with a nixie tube, of the max7219 is always at a low level; the max7219 controls the SEG of each LED of the nixie tube in a corresponding time slot according to a time sequence; if the SEG needs to be turned on, the SEG is at a high level in the corresponding time slot; and if the SEG needs to be turned off, the SEG is at a low level in the corresponding time slot. According to the invention, the single-chip microcomputer can control a large number of bipolar LEDs through three pins, and more bipolar LEDs can be controlled by utilizing the cascade function of the max7219 is utilized, so that the control is simple and efficient.

Description

technical field [0001] The invention belongs to the field of LED drive control, and in particular relates to a control method for controlling a bipolar LED lamp by using max7219. Background technique [0002] If you need a single-chip microcomputer to control multiple LED lights (the number of lights is much larger than the number of pins of the single-chip microcomputer), you can use the max7219 controller. Using this controller, it only needs to occupy 3 pins of the microcontroller to realize the control of multiple max7219s, and each max7219 can control up to 64 LEDs. This control method has a very wide range of applications. [0003] max7219 control principle such as figure 1 As shown, X1~X8 are the chip selection signals of 8 digital tubes, and A~G and DP are the control signals of each LED in the digital tubes. The MCU controls the max7219 through SPI (DSPIN / DSPCS / DSPCK), and the max7219 converts it into the control of each digital tube through internal calculation....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/10
CPCH05B44/00Y02B20/40
Inventor 闫锡桐朱爱微姜博畅徐鹏李培建
Owner TOEC TECH
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