LED Dot Correction Controller

System chart

System chart

This product is the measuring instrument for quality control which used the technology which measures the brightness and chromaticity of the object analyzed by an image from the CCD camera.
Even if it is the same manufacturer, the format to be the same, the brightness and the chromaticity of the LED have a little looseness. Therefore, it is necessary to correct the output to each LED to do the distribution of the brightness and chromaticity of the LED display uniformly.
If applying this system to this problem, it cancels a difference of brightness: it grasps the difference of the brightness of each LED from the measuring result, and then it adds a feed-back-control for them to become uniform and corrects a power level.

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Having trouble with the qualities of LED Panels?
  • Having trouble with the qualities of LED Panels?

    “Spot measurement” has been a common method for measuring the brightness of a LED panel, which is more time-consuming and labor-intensive.

  • Having trouble with the qualities of LED Panels?

    Differences exist in brightness and chromaticity among LEDs even of the same manufacturer and model, which leads to uneven luminescence.

Problems are solved!
  • Problems are solved!

    This system measures brightness of the entire panel using CCD camera, enabling the measurement in a short time.

    animation

  • Problems are solved!

    Differences exist in brightness and chromaticity among LEDs even of the same manufacturer and model, which leads to uneven luminescence.

    animation

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Product Features

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Main Functions

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Specifications

Transform to CIE XYZ values.

Theory of Operation

  1. Measure RGB values with a CCD camera.
  2. Transform to CIE XYZ values.

Measurement Accuracy

Comparison with the KONICA MINOLTA Chroma Meter CS-100A
LCD
display color
Chroma Meter CS-100A This system Error margin
Y x y Y x y Y x y
white 146.00 0.293 0.318 146.45 0.293 0.317 0.45 0.000 0.001
red 30.20 0.639 0.331 30.05 0.640 0.332 0.15 0.001 0.001
blue 11.80 0.141 0.061 11.64 0.141 0.061 0.16 0.000 0.000
green 102.00 0.275 0.589 101.62 0.275 0.590 0.38 0.000 0.001
light blue 114.00 0.204 0.311 114.09 0.204 0.311 0.09 0.000 0.000
purple 42.60 0.306 0.150 42.52 0.306 0.150 0.08 0.000 0.000
yellow 134.00 0.400 0.503 133.95 0.401 0.504 0.05 0.001 0.001

Brightness error margin:less than 0.45    Chromaticity error margin:less than 0.001
(Results may vary according to the environment.)

Measurement Time

Color Correction LED display of 16x16 unit → less than 30 seconds
(Results may vary according to the environment.)

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Customization

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Downloads

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