Digital Foci Portable Digital Photo Album - Manual (Page 35)

Photo Book (PBK-080)
User’s Guide
Page 30
Version 1.0.5-R1
6. Digital Foci LCD Display Pixel Policy
This section defines the different types of pixel anomalies seen on LCD displays,
explains why such anomalies occur, and states standard pixel policy for warranty
service. In order to qualify for repair or replacement under warranty, the number of pixel
anomalies on your LCD panel must exceed these industry standards.
Why Pixel Anomalies Occur
Active-matrix LCD technology uses rows and columns of addressable locations (pixels)
that render text and images on the display. Each pixel location has three subpixels in
the primary colors of red, green, and blue that allow the image to be rendered in full
color. Each subpixel has a corresponding transistor responsible for turning the subpixel
on and off.
The standard of production techniques for LCD manufacturing today cannot guarantee
an absolutely fault-free display. During the production process, it is not uncommon for
one or more pixels to be fixed in an unchanging state. The visible result is a pixel or
subpixel with a fixed color that does not change or one that is dark and does not light at
all. In most situations, these fixed pixels are unnoticeable and do not detract from the
display quality or usability.
Types of Pixel Anomalies
There are two types of pixel anomalies: bright pixel anomaly and dark pixel anomaly.
Bright pixel anomaly: A bright pixel anomaly is defined as a pixel or subpixel that is
always lit or ‘on’. The bright pixel anomaly will constantly show as red, green, blue, or
white.
Dark pixel anomaly: A dark pixel anomaly is defined as a pixel or subpixel that is always
dark or ‘off’. The dark pixel anomaly will always be dark and will not show any color.
Standard Pixel Policy
Digital Foci warrants that any LCD display with an unacceptable number of pixel
anomalies will be repaired or replaced. To qualify for repair or replacement under
warranty, the number of pixel anomalies on the TFT LCD panel must exceed these
industry standards.
Pixel Policy Standards Chart
Anomaly Type # of anomalies
Bright pixel 2
Dark pixel 3
Any combination of bright and dark pixels 4
Technical Support
If you notice your display contains more than the number of pixel anomalies as stated on
the above chart, please contact Digital Foci, Inc. tech support at [email protected].