Print
login Konto
Search

Lenovo LCD Flat Panel Displays (Commercial and Consumer Monitors and All-In-One Desktops) - Pixel Policy

What is a pixel?

Short for picture element, a pixel is a single point in a graphic image. LCD technology products display pictures by dividing the display screen into thousands (or millions) of pixels, arranged in rows and columns. The pixels are placed close together so that they appear connected. A full pixel is a combination of one red, one green, and one blue sub-pixel.

Subpixel
Pixel: Combination of Three Subpixels
Red (R)
Green (G)
Blue (B)
Red subpixel
Green subpixel
Blue subpixel
Pixel

 

What are pixel defects and types of pixel defects?

A pixel defect is actually a malfunctioning subpixel:

  • Not really a pixel defect
  • More correctly called as subpixel defect
  • One of the three subpixels that compose a pixel has malfunctioned
  • Industry uses the term pixel defects to describe the subpixel defect
Types of pixel defects
Bright pixel defects
Bright pixel: Where the Red, Green and Blue sub pixels are bright. Visible as a white dot on a black screen.
Dark pixel defects
Dark pixel: Where the Red, Green and Blue sub pixels are dark. Visible as a black dot on a white screen.
Bright sub pixel defects
Bright sub pixel: Where a Red, Green or Blue sub pixel is bright. Visible as a colored dot on a black screen.

 

ISO-9241


This International Standards Organization Standard defines a specification for classes of pixel defects as detailed below:

Class 0 products have no pixel or sub pixel defects.

Class 1 products can have all or any of the following defects:

  • 1 Bright Pixel (All sub pixels are bright)
  • 1 dark Pixel (All sub pixels are dark)
  • 2 single or adjacent bright or dark sub pixels
  • Up to a total of 5 bright or dark sub pixels (determined by type)


Class 2 products can have all or any of the following defects:

  • 2 Bright Pixel (All sub pixels are bright)
  • 2 dark Pixel (All sub pixels are dark)
  • 2 single or adjacent bright or dark sub pixels
  • Up to a total of 10 bright or dark sub pixels (determined by type, bright sub pixels cannot exceed 5)


Class 3 products can have all or any of the following defects:

  • 5 Bright Pixel (All sub pixels are bright)
  • 15 dark Pixel (All sub pixels are dark)
  • Up to a total of 50 bright or dark sub pixels

 

Lenovo Standard


All Lenovo Monitors and All-in-One Desktop Systems (Commercial and Consumer) will exceed ISO 9241 Class 1 and Class 2 requirements in that Pixel and adjacent Sub Pixel Defects are not permitted. Sub pixel defects in most products meet ISO9241 Class 1 requirements as shown below in the table. The individual model meet ISO9241 Class 3 requirements.

If the number of defective sub pixels on a monitor or All-In-One Desktop exceeds the applicable numbers in the table below during the warranty period then contact Lenovo or your service provider for assistance.

Lenovo Pixel Policy
Type
Resolution
ISO9241
Class 1
Pixel Defect
Bright Sub Pixels
Dark Sub Pixels
Total Sub Pixels
13.3” Wide"
1600 x 900
Y
0
2
5
5
14" Wide
1366 x 768
N
0
2
5
5
15"
1024 x 768
N
0
3
4
4
15" Wide
1366 x 768
N
0
3
3
4
17"
1280 x 1024
Y
0
2
5
5
18.5" Wide
1366 x 768
Y
0
2
5
5
19"
1280 x 1024
Y
0
2
5
5
19" Wide
1440 x 900
Y
0
2
5
5
19" Wide
1680 x 1050
Y
0
2
5
5
19.5” Wide
1600 x 900
Y
0
2
5
5
20"
1600 x 1200
Y
0
2
5
5
20" Wide 1600 x 900
Y
0
2
5
5
20" Wide 1680 x 1050
Y
0
2
5
5
21.5" Wide 1920 x 1080
Y
0
2
5
5
22" Wide 1680 x 1050
Y
0
2
5
5
22" Wide 1920 x 1200
Y
0
2
5
5
23" Wide 1920 x 1080
Y
0
2
5
5
23.6" Wide 1920 x 1080
Y
0
2
5
5
24" Wide 1920 x 1080
Y
0
2
5
5
24" Wide
1920 x 1200
Y
0
2
5
5
29” Wide
2560 x 1080
Y
0
2
5
5
30” Wide
2560 x 1600
Y
0
2
5
5

  • Alias ID: MIGR-69226
  • Document ID: HT002800
  • Last Updated :26.03.2014
  • (c) 2014 Lenovo