Frequently Asked Questions... Q. How do I measure & Calibrate Plasma TV's? Q. How do I measure LED's or OLED's? Q. How do I calibrate a CRT display? Q. How do I measure & calibrate a FED's? Q. How do I calibrate a LCoS Display? Q. How do I use the Video Pattern Generator? Q. Why is display flicker important? Q. What is JEITA discounting of flicker data? Q. How does the flicker measurement of the Klein K Colorimeter work?
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Answer: Measuring LCD's (or Liquid Crystal Displays) can be done using either the K-10 Colorimeter, the K-8 Colorimeter or the K-1 Colorimeter. Simply point one of the Klein Colorimeters at the display; from a distance of two (2) feet. Connect the Colorimeter to a PC computer via serial cable. Start the Klein Colorimeter software. Click test and the measurement will give you the readings.
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Q. How do I measure & Calibrate Plasma TV's? Answer: Measuring Plasma TV's is exactly the same as LCD TV's. Measuring can be done using either the K-10 Colorimeter, the K-8 Colorimeter or the K-1 Colorimeter. Simply point one of the Klein Colorimeters at the display; from a distance of two (2) feet. Connect the Colorimeter to a PC computer via serial cable. Start the Klein Colorimeter software. Click test and the measurement will give you the readings.
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Q. How do I measure LED's or OLED's? Answer: The K-8 is best for OLED's (Organic Light Emitting Diode, known as electrophosphorescence) or single LED's (Light Emitting Diodes). Point the Klein K-8 Colorimeter at an OLED or LED and connected to a PC computer via a serial cable with the Klein software take a measurement. The software will give you all of the details for CIE coordinates.
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Q. How do I calibrate a CRT display? Answer: A CRT (Cathode Ray Tube) can be calibrated with the Klein Convergence Guage. Placed against the screen of the CRT (with a single pixel width grid pattern) measurements can be taken with the Klein Convergence Guage. The measurements will indicate the amount of convergence in relation to the red, green and blue electron beams of the CRT. (In laymans terms the convergence is the amount the electron beams are lined up.)
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Q. How do I measure & calibrate a FED's? Answer: A FED (Flat Panel Display) technology is based on field emitting cathodes to bombard phosphor coatings as the light emissive medium. Any one of the Klein K-10 Colorimeter, K-8 Colorimeter or K-1 Colorimeter can measure a FED. Simply point one of the Klein Colorimeters at the display; from a distance of two (2) feet. Connect the Colorimeter to a PC computer via serial cable. Start the Klein Colorimeter software. Click test and the measurement will give you the readings.
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Q. How do I calibrate a LCoS Display? Answer: LCoS (Liquid Crystal on Silicon) is a "micro-projection" or "micro-display" technology typically applied in projection televisions. It is a reflective technology similar to DLP projectors; however, it uses liquid crystals instead of individual mirrors. Any one of the Klein K-10 Colorimeter, K-8 Colorimeter or K-1 Colorimeter can measure a LCoS. Simply point one of the Klein Colorimeters at the display; from a distance of two (2) feet. Connect the Colorimeter to a PC computer via serial cable. Start the Klein Colorimeter software. Click test and the measurement will give you the readings.
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Q. How do I use the Video Pattern Generator? Answer: The VPG (Video Pattern Generator) is used for all flatpanel displays including CRT's. This device is connected directly into the input of a CRT and will put up resolutions and patterns that will stringently test the capabilities of the CRT. The VPG is controllable via a PC Computer which has the capabilites of creating new patterns as well as storing data for measurements.
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Q. Why is display flicker important? Answer: Manufacturing Inspection and Adjustment: Verify flicker is within spec. If the flat panel has a half frequency nulling adjustment, adjust for a minimum peak at that frequency Engineering Tool: Different elements of a display can cause flicker at different frequencies. Power supply filtering or the grounding may affect a specific frequency, and it is of advantage to see the specific results of an adjustment. Ergonomic Safety Measurement: Measure conformance to ergonomic requirements.
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Q. What is JEITA discounting of flicker data? Answer: It is recognized that high frequency flicker is less bothersome to the eye. The JEITA document EIAJ ED-2523 enumerates a method of examining the FFT of a display's flicker, discounting it partially between 20 and 60 Hz, and greatly above 60 Hz. The Klein K Colorimeter PC Program has this functionality built in.
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Q. How does the flicker measurement of the Klein K Colorimeter work? Answer: The Klein K Colorimeter has analog filter correction files which are uploaded to the PC. In operation, the colorimeter streams data to the PC. The PC program performs a Fast Fourier Transform on the data 8 times a second, corrects for the analog filter, and displays the FFT in graphical form, along with a listing of the peaks.
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