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IND100351-2
Appendix
Pixel Defect Policy
PIXEL DEFECT POLICY
Dot-defects (Bright or dark spots on the panel)
Due to the effect that dot failures are part of the TFT technology such failure occurrence cannot be prevented basically. Even though dot defects
usually occur during production process, new defects can appear within the lifespan of a TFT display. Neither the production at LCD-supplier nor
the use of an LCD-Monitor after shipment can be influenced by Hatteland Technology. Hence Hatteland Technology cannot be made responsible
for such dot failures. However Hatteland Technology understands and accepts the responsibility towards the customers for the delivery of new
displays, therefore accepts a limitation on dot defects occurrence on new displays delivered to the customer.
PRINCIPLES
a.
One pixel consists of 3 dots (Red, Green and Blue)
b. Dot defects are differentiated between:
• Bright dot defects: Spot on the panel appear as pixels or sub pixels that are always lit. Non-extinguishing dot.
• Dark dot defects: Spot on the panel appear as pixels or sub pixels that are always dark (off). Non-lightening dot.
c. Inspector observes the LCD from normal direction at a distance of 50cm above the worktable. Dark dots are
counted under entire white screen. Bright dots are counted under entire black screen.
d. Dot failures within tolerances below do not qualify for warranty claims.
PIXEL DEFECT TOLERANCES
Bright dot ≤ 4 dots
Two adjacent bright dots * ≤ 2
Distance between 2 dot defects * ≥ 15mm
Dark dots ≤ 8
Total number of bright or dark dot defects. * ≤ 8
* 1 or 2 adjacent dot defects considered as 1 defect.
EXTRAORDINARY CIRCUMSTANCES
Possible cases which cannot be influenced either by customer or Hatteland Technology.
Examples for extraordinary circumstances:
• Allocation from LCD-Supplier
• Outstanding high number of LCD-panels with bright dots but within LCD-suppliers Specification.
• Sharply increased demand by customer
In such cases a mutual agreement is inevitable.
Examples:
• Acceptance of bright dots in “non-critical” display areas.
• Acceptance of bright dots with defined color.
Last Revised April 2019
Link to online resource:
https://www.hattelandtechnology.com/hubfs/pdf/misc/ind100351-1_pixeldefectpolicy.pdf