Document No.
D&TQP0302-11(0)
Revision No.
01
Page
8 of 22
5.4.3 Minimum luminance : less than
30cd/
㎡
with full white pattern at the contrast default and
minimum brightness and minimum back light level
5.4.4 Gray scale linearity : The 16 step gray bars shall be distinguishable at the default contrast and
default brightness or 3 steps down contrast setting of the OSD menu
5.4.5 Noise : Pixel displacement, jitter, or swim shall not be visible to the eye when viewed at 50cm
from the LCD panel surface.
5.5 Defect
: Defects are considered to be impairments to video quality, which exist independently of
displayed information. They may be electrical, mechanical, or physical imperfection of
display resulting from processing, handling, shipping, etc.
5.5.1 Bright and Black Dots
The following Table describes the specification of bright and black dots
in the visual
screen
quality
of
the TFT-LCD module at power-ON.
5.5.2
Visual Screen Quality
Item Size(mm)
Permissible
Number
Operation Condition
Circular 0.3
∠
D
≤
3.0
5
with white picture
Foreign Material
(in the polarizer, Cell)
Linear
2
∠
L
≤
15.0
5
with white or black picture
Bright Foreign Material
(in polarizer or cell)
0.3
≤
D
≤
0.5
5
with black picture
Scratches on the polarizer / glass
2
∠
L
≤
15.0
5
Dent on the polarizer / glass
0.3
≤
D
≤
0.8
10
Non operation
z
D: Average Diameter, L: Length,
Items Specification
Any Bright Dots(Two joined dot must be counted 2)
Any Black Dots(Two joined dot must be counted 2)
Bright and Black Dots(total)
Two Joined Bright Dots
Three Joined Bright Dots.
Two joined Black Dots
Three Joined Black Dots
Minimum distance between dot defects
Bright dot – Bright dot
Black dot – Black dot
5x2 Max
10x2 Max
15x2 Max
1x2 Max
1x2 Max
2x2 Max
1x2 Max
5mm
Ignore
Basic Conditions:
Viewing Distance 1500
±
10 mm
Ambient Illumination 300~700 lux(Normal 500lux)
Ambient Temperature 25
±
5
℃
