PM - LED Correction System - Radiant Imaging - #1

PM-LED Correction System measures the lumi­nance and chromaticity of each pixel of an LED panel and automatically adjusts the correction coefficients of each LED to achieve brightness and color uniformity across the panel.

The PM-LED PCS comes in two configurations, an enclosed test station, and a dark room test system. The enclosed test station consists of a light proof chamber that enables the user to calibrate LED panels on a fully-illuminated factory floor. This test station includes a PM-1400 color camera, mechani­cal and electrical fixtures for LED panels, a special ground glass diffuser and light baffles to control stray light. The dark room test system is suited for R&D environments and can calibrate single panel and multi-panel displays.

Before

PM-1400 Series Imaging Colorimeter System Light Proof Chamber (Optional) LED Panel Fixture (Optional) Pentium PC (Optional)

After

ProMetric® 8.5 Software PM-LED Software

Fast: PM-LED can measure, calibrate and test an entire panel in several minutes.

Auto Centering: the software finds the center of each LED even if the panel is rotated or poorly aligned

Provides complete Panel Statistics and Data Records

Luminance typically corrected to within +/- 3%

Color typically corrected to within +/- .003 Cx, Cy

Radiant's PM-1400 systems are ideally suited to accurate LED measure­ment. They have full frame CCDs with mechanical shutters, which means there are no inactive gaps between the CCD pixels. This is quite important since the LED's are imaged as sharp spikes onto the CCD. CCDs with electronic shutters have gaps between the pixels and depending on how the spikes in luminance are imaged onto the CCD, there can be a large measurement error. To measure color, the ProMetric 1400 series cameras use a rotating filter wheel containing high precision CIE matching filters rather than standard gels mounted directly on the CCD. This enables the highest level of color accuracy. The 14-bit dynamic range can accurately measure the brightness over a large dynamic range that exits because of the high peaks and valleys of luminance on a LED module.

Radiant Imaging, Inc. 15321 Main Street NE, Suite 310, PO Box 5000, Duvall, WA 98019, United States

Phone: (425) 844-0152 Fax: (425) 844-0153 RADIANT

sales@radiantimaging.com http://www.radiantimaging.com IMAGING

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