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Simplified small-scale backlight unit tester.

Ruei-Hung Tsai1, Fang-Hsuan Su, Jui-Pin Chen

  • 1Instrument Technology Research Center, National Applied Research Laboratories, Taiwan 300, Republic of China.

The Review of Scientific Instruments
|December 7, 2007
PubMed
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A new method uses a charge-coupled device camera and image processing to measure light output and consistency in small backlight units. This validated a novel backlight unit tester design.

Area of Science:

  • Optoelectronics
  • Image Processing
  • Metrology

Background:

  • Accurate measurement of luminance and uniformity is crucial for small-scale backlight units.
  • Existing methods may be complex or unsuitable for precise, small-scale measurements.

Purpose of the Study:

  • To introduce a novel two-dimensional luminance meter for small-scale backlight units.
  • To verify the feasibility and performance of the proposed measurement system.

Main Methods:

  • Utilizing a charge-coupled device (CCD) camera integrated with a calibrated image processing algorithm.
  • Developing a dedicated small-scale backlight unit tester to implement the measurement concept.

Main Results:

  • The developed system successfully measured luminance and uniformity.

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  • The experimental verification confirmed the efficacy of the novel design.

    • Conclusions:

    • A charge-coupled device camera with image processing offers a viable solution for 2D luminance measurement.
    • The realized backlight unit tester effectively demonstrates this innovative approach for precise optical testing.