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LM151X2 Datenblatt(PDF) 7 Page - NXP Semiconductors |
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LM151X2 Datenblatt(HTML) 7 Page - NXP Semiconductors |
7 / 25 page Revision Ver 1.0 October 14, 1998 Page 7/25 LM151X2 Liquid Crystal Display Product Specification Notes 1. Contrast Ratio (CR) is defined mathematically as: (Surface Brightness with all white pixels) (Surface Brightness with all black pixels) Contrast ratio shall be measured at the center of the display (Location 1). 2. Average Brightness is the average of brightness value at location 1 to 5 with all pixels displaying white. B1 + B2 + B3 + B4 + B5 B(AVE) = 5 3. The variation in surface brightness, SBV is defined as : Maximum (B1, B2, ....B13) - Minimum (B1, B2, ....B13) Average (B1, B2, .... B5) Where B1 to B13 are the brightness with all pixels displaying white at 13 locations. 256 512 20mm 20mm 192 384 576 ( pixel) 5 4 3 13 12 11 10 9 8 7 6 2 1 768 4. The response time is defined as the following figure and shall be measured by switching the input signal for ”black” and ”white”. TrR TrD 100 90 10 0 % Optical Response white black white × Alpha Point Ltd. P.O. Box 41 00751 Helsinki, Finland http://www.alpha.fi Tel.: +358-9-34 64 34 1 Fax: +358-9-34 64 34 2 |
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