Consumer demand for high image quality from DLP™ based front projection systems requires that manufacturers closely control a number of different image parameters. These include display brightness, brightness uniformity, contrast ratio (sequential black and white, and checkerboard), color, color uniformity, distortion, gamma, focus, and gray scale. Detection and quantification of blemishes and pixel level defects is also important.

Traditionally, this type of testing has been performed using either fixed arrays of detectors, or by scanning a single spot photometer/colorimeter over the image area. However, neither of these techniques fully meets the needs of display manufacturers. For instance, the primary downside of a scanned spot photometer/colorimeter is slow measurement speed. And detector arrays, usually arranged in ANSI 9 or 13 point configurations cannot identify image blemishes and pixel defects.

Radiant Imaging’s PM-PTS™ is a comprehensive, turnkey solution for measuring front projection display output parameters and identifying display defects. PM-PTS™ consists of a PM Series™ Imaging Colorimeter mated to a specialized projection test software suite. This software controls the pattern displayed on the projector, and performs measurement and analysis of the measurement. This enables testing and calibration to be fully automated. Most importantly, the PM-PTS™ utilizes a calibration light source to map the characteristics of the projection screen or display surface, and then remove these screen related factors from the projected image prior to analysis.