Flexible measurement of luminance and chromaticity of TV displays

Compact solution including the R&S®DVSG digital video signal generator and the Konica Minolta CS200 chromameter/CS2000 spectroradiometer

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Your task

You are responsible for development. You use Konica Minolta CS200 chromameters/CS2000 spectroradiometers in lumi nance and chromaticity measurements for quality assurance or for testing TV displays and projectors. Highly accurate color reproduction is an essential quality criterion of TV displays and must therefore satisfy national and international standards.

T & M solution

A typical setup for performing quality measurements includes a high-precision test signal source such as the R&S®DVSG digital video signal generator, which supplies the display with specific uncompressed test patterns via an HDMI interface.

The chromaticity measurement itself is performed by means of chromameters/spectroradiometers such as the Konica Minolta CS200/CS2000. These meters are directly connected to the signal generator via a USB cable. The Konica Minolta meters are controlled using evaluation software that has been preinstalled on the R&S®DVSG.

Application

For quality assessment, measurement standards (e.g. EBU, SMPTE, ANSI, ISO) define a wide variety of measurements that help to assess the overall quality of TV displays.

The most important parameters are the following:

  • Dynamic range
  • Contrast
  • Gamma
  • Gamut
  • Picture homogeneity

Spectroradiometers such as the Konica Minolta CS2000 enable excellent contrast measurements up to 100 000:1 with adjustable measurement angle (e.g. 1° for the application described). These measurements must be performed in a darkened room. In order to achieve usable results, the VESA flat panel display measurement standard 2 (FPDM2) specifies an ambient luminance of less than 1 lux. The spectrometer must be positioned at a distance that is three to four times the display height.

The R&S®DVSG with its Windows XP Embedded operating system works like a system controller and can be used for remote-control or evaluation applications. The signal generator comes ready with the Konica Minolta CS-S10w data management software for KM CS200/CS2000.

This measurement setup is a cost-efficient and compact one-box solution for the generation of signals as well as the numeric and visual evaluation of measurement results.

Features

  • Uncompressed moving sequences with resolutions of up to 1080p (TV) and WUXGA (PC)
  • Deep color (30/36 bit), xvYCC support
  • User-selectable variation of interface parameters and signal amplitude
  • Multichannel audio generation
  • Windows XP Embedded system controller
  • Minolta CS-S10w data management software preinstalled

Benefits

  • Cost-efficient one-box solution for signal generation and evaluation
  • Reference signal source with uncompressed static test patterns and moving sequences for research and development applications
  • Flexibility for customer applications due to easy generation of custom test sequences
  • Optimized turnaround time thanks to automated tests