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 (Liquid Crystal Displays) can be done using either the K-10 Colorimeter, or the K-8 Colorimeter (for small LCD's). Simply point one of the Klein Colorimeters at the display. Connect the Colorimeter to a PC computer via serial cable. Start the Klein Colorimeter software. Click Measure color and the program will give you the readings.
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Q. How do I measure & Calibrate Plasma TV's? Answer: Measuring Plasma TV's is similar to measuring LCD TV's. Measuring can be done using either the K-10 Colorimeter, or the K-1 Colorimeter. Simply point the K-10 at the display. (The K-1 is a contact colorimeter and should be placed on the glass). Connect the Colorimeter to a PC computer via serial cable. Start the Klein Colorimeter software. Click Measure color and the program will give you the readings.
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Answer: The K-8 is best for OLED (Organic Light Emitting Diode) displays. It has a small 4mm tip for measuring small displays. Point the Klein K-8 Colorimeter at an OLED and connect it to a PC computer via a serial cable. Open the Klein software and take a measurement. The software will give you all of the details for CIE coordinates.
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Q. How do I measure convergence error on a CRT display? Answer: A CRT's (Cathode Ray Tube) convergence error can be measured with the Klein Convergence Gauge. Just place the gauge on the glass, look into the eyepiece and turn the knobs. The easy process is explained in the Convergence Guage part of our website. The measurements will indicate the amount of convergence error in relation to the red, green and blue electron beams of the CRT.
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Q. How do I measure & calibrate a FED's? Answer: FED (Flat Panel Display) displays are 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. Connect the Colorimeter to a PC computer via serial cable. Start the Klein Colorimeter software. Click Measure color and the program 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. We recommend the Klein K-10 Colorimeter for LCoS displays. See the Cinema and Home Theater section of our website from the home page to learn more about measuring projection displays.
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Q. How do I use the Video Pattern Generator? Answer: The VPG (Video Pattern Generator) is used for all display types. This device is connected to displays by VGA or BNC input. It will put up resolutions and patterns to test the capabilities of the display. 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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