Vision-based quick LED module brightness uniformity detection method

A technology for LED modules and brightness uniformity, which is applied in the field of rapid detection of brightness uniformity of LED modules based on vision, and can solve problems such as chromaticity drift, uneven color, mosaic blocks, etc.

Inactive Publication Date: 2016-01-13
CHONGQING PINGWEI PHOTOELECTRIC SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For LED displays that magnify the video source hundreds or even thousands of times, human eyes can distinguish 1%-2% brightness differences between modules, so LED displays spliced ​​by LED lights with inconsistent brightness will be There are phenomena such as uneven color or mosaic blocks; and, for the LED display with uniform brightness uniformity at the f...

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  • Vision-based quick LED module brightness uniformity detection method
  • Vision-based quick LED module brightness uniformity detection method
  • Vision-based quick LED module brightness uniformity detection method

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Embodiment Construction

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0036] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention discloses a vision-based quick LED module brightness uniformity detection method. The method comprises the following steps: S1, a light emitting image of the LED module is acquired, gray processing is carried out on the image, the image is filtered after gray processing, the image after being filtered is subjected to morphological processing, and the image after morphological processing is subjected to histogram equalization processing; S2, each LED lamp point is positioned through block positioning algorithm, the LED lamp point is subjected to gray processing, the LED lamp point after gray processing is subjected to mathematical morphological open operation, and the brightness value of the LED lamp point and an average value are acquired; and S3, after each LED lamp point in the LED module is traversed, the brightness value of each LED lamp point is displayed, and the final processing result is displayed. The method plays an important role in yield detection during the LED lamp production process.

Description

technical field [0001] The invention relates to the field of analyzing the brightness uniformity of LED lamps, in particular to a vision-based rapid detection method for the brightness uniformity of LED modules. Background technique [0002] In recent years, as one of the important carriers of multimedia technology, LED display plays an increasingly important role in people's work, life and entertainment, and gradually attracts people's attention. Due to the low working voltage of LED light-emitting diodes, impact resistance, vibration resistance, and long life, there is currently no other display method that can match the LED display method in large-scale display devices. [0003] A display screen is composed of tens of thousands of light-emitting diodes, and it is impossible to require the brightness of each diode to be exactly the same. According to the industrial grading standard of the LED manufacturer, the maximum brightness error allowed by the same batch of LED displ...

Claims

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Application Information

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IPC IPC(8): G01M11/02G06T7/00
Inventor 罗元邓燕张毅李述洲王兴龙
Owner CHONGQING PINGWEI PHOTOELECTRIC SCI & TECH
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