PHILIPS 300WN5BB00
Service Manual

22

300WN5
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Definition of Pixel Defects
3. Pixel Defect Tolerances In order to qualify for repair or replacement due to pixel defects during the warranty period, a TFT LCD panel in a PHILIPS flat panel monitor must have pixel or subpixel defects exceeding the tolerances listed in the following tables.

0. General
This section explains the different types of pixel defects and defines acceptable defect levels of each type. In order to qualify for repair or replacement under warranty, the number of pixel defects on a TFT LCD panel must exceed these acceptable levels.

1. Definition of Pixels and Subpixels
A pixel, or picture element , is composed of three subpixels in the primary colors of red, green and blue. Many pixels together from an image. When all subpixels of a pixel are lit, the three colored subpixels together appear as a single white pixel. When all are dark, the three colored subpixels together appear as a single black pixel. Other combinations of lit and dark subpixels appear as single pixels of other colors.

BRIGHT DOT DEFECTS MODEL 1 lit sub pixel 2 adjacent lit sub pixels 3 adjacent lit sub pixels (one white pixel)

ACCEPTABLE LEVEL 300WN5 3 or fewer 0 0

Subpixel

Subpixel

Subpixel

Distance between two bright dot defects* Total bright dot defects of all types
Pixel

25 mm or more

2 or fewer

BLACK DOT DEFECTS

ACCEPTABLE LEVEL 300WN5 5 or fewer 1 or fewer 0 15 mm or more

2. Types of Pixel Defects
MODEL
Pixel and subpixel defects appear on the screen in different ways. Bright dot defects Bright dot defects appear as pixels or subpixels that are always lit or "on"�. These are the types of bright dot defects:.

1 dark sub pixel 2 adjacent dark sub pixels 3 adjacent dark sub pixels Distance between two black dot defects*

One lit red, green or blue subpixel

Total black dot defects of all types TOTAL DOT DEFECTS MODEL Total bright or black dot defects of all types

5 or fewer

Two adjacent lit subpixels: - Red + Blue = Purple - Red + Green = Yellow - Green + Blue = Cyan (Light Blue)

ACCEPTABLE LEVEL 300WN5 5 or fewer

Three adjacent lit subpixels (One white pixel)

Note: 1 or 2 adjacent subpixel defects = 1 dot defect

Black dot defects Black dot defects appear as pixels or subpixels that are always dark or "off"�TThese are the types of black dot defects:

One dark subpixel

Two or three adjacent dark subpixels