A kind of LED display field testing device and testing method

Abstract

The present invention discloses a field test device for LED display screens, comprising a pneumatic lifting rod, an air pump, an optical testing device, a reference platform, a fixed base, a portable power supply, a computer, and a three-dimensional rotating pan platform, and the pneumatic lifting rod is vertically installed on the fixed base , is driven by an air pump to expand and contract; the reference platform is installed horizontally on the top of the pneumatic lifting rod, and the three-dimensional rotating head is installed on the reference platform, which is driven by the driving device to perform three-dimensional rotation; the optical test device is installed on the three-dimensional rotating head; the computer is used for real-time acquisition And display the image taken by the optical test device, and drive the optical test device to rise and fall freely and three-dimensionally rotate by controlling the lifting rod to do the lifting movement and the three-dimensional rotating pan-tilt for three-dimensional rotation; the portable power supply supplies power for the above-mentioned air pump, optical test device, computer, and driving device . The test device and method of the present invention have the advantages of high test accuracy, strong environmental adaptability, convenient disassembly and transportation, and high degree of automation.

Description

technical field [0001] The invention relates to the field of LED semiconductor lighting detection, in particular to an on-site testing device and testing method for an LED display screen. Background technique [0002] At present, there are clear testing standards for the testing of the optical characteristics of LED displays, including laboratory testing and on-site testing. Laboratory testing items include brightness, brightness uniformity, brightness identification level, gray scale, contrast, and white field color coordinates. , Angle of view, refresh frequency, dominant wavelength error, etc., generally refer to the traditional liquid crystal screen detection method, there is a special automatic test system for the optical characteristics of the display screen, which is mainly composed of a five-axis turntable, a trace-type optical test device and a signal source. Due to the limitations of space and the structure of the laboratory display test system, it can basically on...

AI Technical Summary

Problems solved by technology

However, for larger LED displays, the performance parameters of a single display module or module cannot represent the overall performance of the entire LED display

[0003] For a large number of LED displays used outdoors, on-site inspections are required during installation and commissioning, engineering acceptance, and delivery. The inspection items include brightness, brightness uniformity, brightness identification level, gray scale, contrast, and white field color. Coordinates, viewing angles, dominant wavelength errors, etc., generally use test instruments such as chroma luminance meters or spectroradiometers, but due to the inconsistency and complexity of the LED display installation environment, especially outdoor LED displays are generally installed at higher places, It is difficult to find a suitable location with the same height to place the optical test device, and the hand-held optical test device often brings greater test inconvenience and test error

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