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LM195WD1 Datasheet(PDF) 20 Page - LG Semicon Co.,Ltd.

Part No. LM195WD1
Description  19.5 HD TFT LCD
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Maker  LG [LG Semicon Co.,Ltd.]
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Product Specification
LM195WD1
Liquid Crystal Display
Ver. 0.2
Feb. 04, 2013
20 / 31
Notes :
1. Contrast ratio(CR) is defined mathematically as :It is measured at center point(1)
Surface luminance with all white pixels
Contrast ratio =
---------------------------------------------------------
Surface luminance with all black pixels
2. Surface luminance is the luminance value at center 1 point(1) across
the LCD surface 50cm from the surface with all pixels displaying white.
For more information see FIG 8.
3. The variation in surface luminance ,  WHITE is defined as
Minimum (P1,P2 …..P9)
WHITE = --------------------------------------------- *100
Maximum (P1,P2 …..P9)
For more information see Figure 8.
FIG. 8 Luminance measuring point
<Measuring point for luminance variation> <Measuring point for surface luminance>
H
H/2
V/2
V
H : 433.92 mm
V : 236.34 mm
@ H,V : Active Area
Active Area
1
4
2
7
H
V
3
5
6
8
9
V/10
V/2
H/2
H/10
The values specified are at an approximate distance 50cm from the LCD surface at a viewing
angle of  and  equal to 0 °.
FIG. 7 presents additional information concerning the measurement equipment and method.
FIG. 7 Optical characteristic measurement equipment and method
50cm
Optical
Stage(x,y)
LCD Module
Pritchard 880
or equivalent




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