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Voltage regulation method and device based on LED lamp beads

A LED lamp bead and voltage regulation technology, applied in electrical components, energy-saving control technology, etc., can solve the problems of lamp bead reverse bias, LED display dead light, wrong lighting, etc., and achieve the effect of improving the display effect

Pending Publication Date: 2021-09-28
UNILUMIN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The LED screen is equipped with the positive pole of a row of lamps controlled by the line tube and the negative pole of a column of lamps controlled by a constant current IC, and the LED screen is a scanning screen. Due to the influence of parasitic capacitance, one lamp is lit When it happens, the next lamp in the bank will be mistakenly lit, which is referred to as ghosting. In the prior art, the constant current IC has a pre-charging circuit designed to eliminate ghosting, increasing the voltage of the negative pole of the LED lamp to make the lamp The voltage of the positive and negative poles is lower than the voltage when the lamp beads can be lit, thereby eliminating the ghost image, but at the same time, it will cause the LED lamp beads on other rows to be reversed. It will cause a large area of ​​dead light on the LED display

Method used

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  • Voltage regulation method and device based on LED lamp beads
  • Voltage regulation method and device based on LED lamp beads
  • Voltage regulation method and device based on LED lamp beads

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Experimental program
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Embodiment 1

[0027] Such as figure 1 As shown, in this embodiment, a voltage regulation method based on LED lamp beads, including:

[0028] S10. Collect the positive and negative voltages of the LED lamp beads;

[0029] S20. Calculate the back pressure value of the LED lamp bead according to the positive and negative pole voltages of the LED lamp bead;

[0030] S30. If the back voltage value is greater than the preset voltage threshold, adjust the pre-charging voltage and time of the constant current IC.

[0031] In this embodiment, by automatically adjusting the pre-charging voltage and time of the constant current IC, the back-voltage value of the LED lamp bead is within a reasonable range, which solves the problem of ghosting and improves the display effect of the LED lamp.

[0032] In this embodiment, the functional block diagram adopted by this method is as follows figure 2 As shown, the positive and negative voltages of the LED lamp beads are collected through the ADC sampling ci...

Embodiment 2

[0042] Such as Figure 4 As shown, in this embodiment, a voltage regulating device based on LED lamp beads includes:

[0043] The collection module 10 is used to collect the positive and negative voltages of the LED lamp bead;

[0044] A calculation module 20, configured to calculate the back pressure value of the LED lamp bead according to the positive and negative pole voltages of the LED lamp bead;

[0045] The adjustment module 30 is configured to adjust the pre-charging voltage and time of the constant current IC if the back voltage value is greater than a preset voltage threshold.

[0046] In this embodiment, by automatically adjusting the pre-charging voltage and time of the constant current IC, the back-voltage value of the LED lamp bead is within a reasonable range, which solves the problem of ghosting and improves the display effect of the LED lamp.

[0047] In this embodiment, the functional block diagram adopted by this method is as follows figure 2 As shown, t...

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PUM

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Abstract

The invention discloses a voltage regulation method and device based on an LED lamp bead, and belongs to the field of LED equipment, wherein the method comprises the steps: collecting the positive electrode voltage and the negative electrode voltage of the LED lamp bead; calculating a back voltage value of the lamp bead according to the positive electrode voltage and the negative electrode voltage of the LED lamp bead; and if the back voltage value is greater than a preset voltage threshold value, adjusting pre-charging voltage and time of a constant current IC. By automatically adjusting the pre-charging voltage and time of the constant current IC, the back voltage value of the LED lamp bead is within a reasonable range, the ghosting problem is solved, and the display effect of the LED lamp is improved.

Description

technical field [0001] This article relates to the field of LED equipment, in particular to a voltage regulation method and device based on LED lamp beads. Background technique [0002] The LED screen is equipped with the positive pole of a row of lamps controlled by the line tube and the negative pole of a row of lamps controlled by a constant current IC, and the LED screen is a scanning screen. Due to the influence of parasitic capacitance, one lamp is lit When it happens, the next lamp in the bank will be mistakenly lit, referred to as ghosting. In the prior art, the constant current IC has a pre-charging circuit designed to eliminate ghosting, increasing the voltage of the negative pole of the LED lamp bead so that the lamp bead The voltage of the positive and negative poles is lower than the voltage when the lamp beads can be lit, thereby eliminating the ghost image, but at the same time, it will cause the LED lamp beads on other rows to be reversed. It will cause a la...

Claims

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Application Information

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IPC IPC(8): H05B45/34
CPCY02B20/40
Inventor 鲁胜奇雷松
Owner UNILUMIN GRP