Application Overview: Displays
This page provides an overview of the products and services which Pro-Lite offers for those working with displays and projectors; the measurement equipment is listed by measurement parameter. In addition to test & measurement equipment, we provide measurement services and a training course aimed at those new to the field of light measurements, photometry and colorimetry. We also offer diffuse reflectance materials for backlight assemblies that provide for improved illumination uniformity.
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IlluminanceTraditionally, the screen illuminance from a projector is measured using an illuminance photometer. From Konica Minolta we offer the T-10 portable photometer, while the CL-200 is a lux meter which doubles as a tristimulus colimeter to record the colour (chromaticity, x y or u' v') and colour temperature of the light source. The spatial light and colour distribution from a projector can be simply measured using a ProMetric™ CCD imaging photometer. The bolt-on PM-PTS™ application software allows the ProMetric™ camera to automatically measure and set the brightness, brightness uniformity, contrast ratio, colour, colour uniformity, gamma, convergence, distortion and focus and in addition identify display defects and blemishes. The PM-DCB™ software provides the further utility of performing colour and gamma correction so that the target colour temperature of the display is maintained at all brightness levels.
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LuminanceThe brightness (more correctly, luminance) and colour of a display are often measured using a "spot" luminance meter. From Konica Minolta we offer the LS-100/110 portable spot luminance meter, while the CS-100A and CS-200 double as a tristimulus colorimeters to record the colour (chromaticity, x y or u' v') and colour temperature of the light source.
A ProMetric™ CCD Imaging photometer can be used for fast brightness and colour uniformity measurements. This can also be used to measure the spatial luminance and colour distribution of FPD backlights, polarisers and brightness enhancing films. Compared to a traditional spot photometer, a ProMetric camera records the luminance at literally millions of points on the display, and can be programmed to automatically reveal pixel, column and other defects that traditional methods would probably miss. Auxiliary software is also available to further simplify the measurement of OLED and LED array displays, whilst an advanced utility is offered to perform colour and brightness balancing of LED panel displays in situ.
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Reflectance & Contrast RatioReflectance greatly affects the effective contrast ratio of a display. An integrating sphere can be used to measure the diffuse reflectance when placed up against the display, or provides for uniform, specular illumination when positioned at a distance. For characterising the visual performance of a display when illuminated at any angle of incidence, the Imaging Sphere™ IS-SA™ provides instaneous goniometric measurements of the view angle and effective contrast ratio of a flat panel display.
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Spectral RadianceFor the highest colorimetric accuracy spot luminance measurements, a spectroradiometer is the preferred instrument. The CS-2000 from Konica Minolta is the very latest, state-of-the-art spectroradiometer designed specifically for high accuracy luminance and colour measurements with the latest generations of displays. Compared to the previous model (CS-1000), the CS-2000 can measure much lower light levels, which is important for accurate measurements of high contrast ratios.
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View AngleBy combining a ProMetric™ CCD imaging photometer with a motorised goniometer stage, PM-FPMS™ performs measurements of luminance and colour versus angle for all points on a display at a time. For instantaneous measurements of luminance and colour at all angles simultaneously at one point on the display at a time, we offer the Imaging Sphere™ IS-VA™.
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