Acer AL1512 Service Manual - Page 11

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Luminance of center point: L=L(5)

Brightness Uniformity Measurement points: Five specified points 1-5

Formula: Maximum [L (1), L (2), L (3), L (4), L (5)]/Minimum [L (1), L (2), L (3), L (4),

L (5)]

Note (3) Definition of Response Time (T

100%

90%

Optical

10%

Response

Note (4)

Measurement Setup:

The LCD module should be stabilized at given temperature for 20 minutes to

avoid abrupt temperature change during measuring. In order to stabilize the

luminance, the measurement should be executed after lighting Backlight for

20 minutes in a windless room.

LCD Module

LCD Panel

Center of the Screen

, T

Gray Level 255

Field of View = 2º

500 mm

Gray Level 255

Gray Level 0

Photometer

(TOPCON BM-5A)

Light Shield Room

(Ambient Luminance < 2 lux)

Time