Definition Of Pixel Defects - Dell 1908FPC Service Manual

19" LCD Color Monitor Dell 1908FPC

4.5 Definition of Pixel Defects

4.5. 1.Description
These inspection standards shall be applied to LCD Module supplied by CHI MEI Optoelectronics Corporation.
4.5.2 The environmental condition of inspection
The environmental condition and visual inspection shall be conducted as below.
Ambient conditions
a. Temperature: 25±5 ℃
b. Humidity: 65 ±10% RH
c. Illumination: Single 20W fluorescent lamp non-directive
(300 to 700 Lux)
Viewing distance
The distance between the LCM and the inspector's eyes shall be at least 30-50㎝.
Viewing Angle
The inspection shall be conducted within normal viewing angle range.
Refer to the CAS for viewing angle.
※
4.5.3. Dot Defect
Bright Dot
Dots (sub-pixels) which appeared brightly in the screen when the LCM displayed with Full Black pattern.
-R, G or B 1 dot ---------------------------------0 Max
-Adjacent 2 dots --------------------------------0 Max
-Total amount of Bright dots --------------------0 Max
Partial Bright Dot
-Partial bright dot (tiny dot) --------------------5 Max
* Bright dot and Partial dot definition is referred to the Appendix B
Dark Dot
Dots (sub-pixels) which appeared darkly in the screen when the LCM displayed with bright pattern.
-1 dot --------------------------------------------5 Max
-Adjacent 2 dots --------------------------------2 Max
-Adjacent 3 dots --------------------------------1 Max
-Total amount of Dark dot ----------------------5 Max
-Minimum distance of Dark dots ---------------5mm
Total amount of Dot Defects --------------------5 Max (except Partial bright dot)
4.5.4. Polarizer Defects
18