R
Running Through The Forest
- Jan 1, 1970
- 0
Here is a copy of the pixel policy for BenQ and judge by this how similar companies
may take complaints
BenQ Australia
LCD Monitors: LCD Defect Policy
----------------------------------
Due to the cost of producing LCD panels, panel manufacturers
have set limits as to how many defective dots (or sub-pixels)
are deemed to be acceptable for a standard LCD panel. The goal
in setting such limits is to maintain a reasonable price of the
panel while minimizing distraction from defective dots.
What is a Bright and or a Dark Dot?
----------------------------------
A pixel (picture element) consists of one red and one green and
one blue dot or sub pixel. A standard 15" LCD panel with a resolution
of 1024 x 768 pixels has a total of 786,432 pixels or 2,359,296 dots.
17", 18.i" or 19" LCD panels have almost 4 million dots, while a
20.1" LCD has more than 5.5 million dots.
Each dot is driven by an individual transistor. If a transistor becomes
defective, the corresponding dot may be permanently lit (a bright dot)
or may not light (a dark dot). For a manufacturer to guarantee that all
LCD panels are totally defect free would lead to a much higher cost of
manufacture.
Defective Pixel Specifications
1. Total Defective Dots
The specifications for the number of defects that are deemed to be
acceptable for each size of LCD panel are:
LCD Panel Size Maximum Number of Maximum Number Total Dots
Bright Dots Dark Dots (Maximum)
15"/38.1 cm 2 3 5
17"/43.2cm 3 4 7
18.1"/46cm 4 4 9
19"/48.3cm 4 5 9
20.1"/51.lcm 5 5 10
2. No Bright Dots in the Central Area of the LCD Panel.
-------------------------------------------------------
The central third (1/3) bright dots area of the BenQ LCD panel is
as illustrated below, taking up one of the height and width of the
panel (one ninth of the area). No may occur in this area. * Please
note that the FP767 ver2 white/red and the FP791 have a no bright
dot policy for the 1st
year*
_________________________________________________________
| | | |
| | | |
| 1/9 | 1/9 | 1/9 |
| | | |
|________________|______________________|_______________|
| | | |
| | No Bright | |
| 1/9 | In This | 1/9 |
| | Area | |
|________________|______________________|_______________|
| | | |
| | | |
| 1/9 | 1/9 | 1/9 |
| | | |
|________________|______________________|_______________|
* Please note that the FP767 ver2 white/red and the FP791 have a
no bright dot policy for the 1st year*
LCD Monitor Pixel Spec. Revision 3, 12’~ March. 2004
may take complaints
BenQ Australia
LCD Monitors: LCD Defect Policy
----------------------------------
Due to the cost of producing LCD panels, panel manufacturers
have set limits as to how many defective dots (or sub-pixels)
are deemed to be acceptable for a standard LCD panel. The goal
in setting such limits is to maintain a reasonable price of the
panel while minimizing distraction from defective dots.
What is a Bright and or a Dark Dot?
----------------------------------
A pixel (picture element) consists of one red and one green and
one blue dot or sub pixel. A standard 15" LCD panel with a resolution
of 1024 x 768 pixels has a total of 786,432 pixels or 2,359,296 dots.
17", 18.i" or 19" LCD panels have almost 4 million dots, while a
20.1" LCD has more than 5.5 million dots.
Each dot is driven by an individual transistor. If a transistor becomes
defective, the corresponding dot may be permanently lit (a bright dot)
or may not light (a dark dot). For a manufacturer to guarantee that all
LCD panels are totally defect free would lead to a much higher cost of
manufacture.
Defective Pixel Specifications
1. Total Defective Dots
The specifications for the number of defects that are deemed to be
acceptable for each size of LCD panel are:
LCD Panel Size Maximum Number of Maximum Number Total Dots
Bright Dots Dark Dots (Maximum)
15"/38.1 cm 2 3 5
17"/43.2cm 3 4 7
18.1"/46cm 4 4 9
19"/48.3cm 4 5 9
20.1"/51.lcm 5 5 10
2. No Bright Dots in the Central Area of the LCD Panel.
-------------------------------------------------------
The central third (1/3) bright dots area of the BenQ LCD panel is
as illustrated below, taking up one of the height and width of the
panel (one ninth of the area). No may occur in this area. * Please
note that the FP767 ver2 white/red and the FP791 have a no bright
dot policy for the 1st
year*
_________________________________________________________
| | | |
| | | |
| 1/9 | 1/9 | 1/9 |
| | | |
|________________|______________________|_______________|
| | | |
| | No Bright | |
| 1/9 | In This | 1/9 |
| | Area | |
|________________|______________________|_______________|
| | | |
| | | |
| 1/9 | 1/9 | 1/9 |
| | | |
|________________|______________________|_______________|
* Please note that the FP767 ver2 white/red and the FP791 have a
no bright dot policy for the 1st year*
LCD Monitor Pixel Spec. Revision 3, 12’~ March. 2004
