LM230WF5
Liquid Crystal Display
Product Specification
The values specified are at an approximate distance 50cm from the LCD surface at a viewing angle of
and equal to 0 ꢀ and aperture 1 degree.
FIG. 7 presents additional information concerning the measurement equipment and method.
FIG. 7 Optical characteristic measurement equipment and method
LCD Module
Optical Stage(x,y)
Pritchard 880, RD-80S or
equivalent
50cm
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>
H
<Measuring point for surface luminance>
H
H/10
H/2
H/2
2
5
3
4
6
V/2
V/2
V
V
1
7
8
9
V/10
Active Area
H : 509.184 mm
V : 286.416 mm
@ H,V : Active Area
Ver. 0.0
Feb. 16, 2012
20 / 30
LG [ LG SEMICON CO.,LTD. ]
