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參數(shù)資料
| 型號： | HT12X21 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TFT-LCD PRODUCT |
| 中文描述： | TFT - LCD的產品 |
| 文件頁數(shù)： | 8/22頁 |
| 文件大?。?/td> | 352K |
| 代理商： | HT12X21 |
PRODUCT GROUP
REV.
ISSUE DATE
TFT-LCD PRODUCT
A
2003.07.22
PAGE
SPEC. NUMBER
S864-1148
SPEC. TITLE
HT12X21-100 Product Specification
8
OF 22
B3-002-O (3/3)
A4 (210 X 297)
Note:
1.
Viewing angle is the angle at which the contrast ratio is greater than 10. The viewing are
determined for the horizontal or 3, 9 o’clock direction and the vertical or 6, 12 o’clock direction with
respect to the optical axis which is normal to the LCD surface (see FIGURE 1 shown in Appendix).
2.
Contrast measurements shall be made at viewing angle of è= 0
°
and at the center of the LCD
surface. Luminance shall be measured with all pixels in the view field set first to white, then to the
dark (black) state. (See FIGURE 1 shown in Appendix) Luminance Contrast Ratio (CR) is defined
mathematically.
Luminance when displaying a white raster
CR =
Luminance when displaying a black raster
3.
Luminance of white is defined as a center point(#1) on LCD surface. Luminance shall be
measured with all pixels in the view field set first to white. This measurement shall be taken at the
locations shown in FIGURE 2 for a total of the measurements per display.
4.
The White luminance uniformity on LCD surface is then expressed as : Y = Maximum
Luminance of 5 points / Minimum Luminance of 5 points (see FIGURE 2 shown in Appendix).
5.
The color chromaticity coordinates specified in Table 4 shall be calculated from the spectral data
measured with all pixels first in red, green, blue and white. Measurements shall be made at the
center of the panel.
6.
The electro-optical response time measurements shall be made as FIGURE 3 shown in
Appendix by switching the “data” input signal ON and OFF. The times needed for the luminance to
change from 10% to 90% is Tr, and 90% to 10% is Td.
7.
Cross-Talk of one area of the LCD surface by another shall be measured by comparing the
luminance (Y
A
) of a 25mm diameter area, with all display pixels set to a gray level, to the
luminance (Y
B
) of that same area when any adjacent area is driven dark. (See FIGURE 4 shown
in Appendix).
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