Appendix F
Operating Instructions ET-xx8 / MT-xx8
R. STAHL HMI Systems GmbH / OI_ET_MT-xx8_en_V_01_02_03.docx / 10.03.2021
Page 71 of 84
22 Appendix F
22.1 Defective pixels
As a result of the manufacturing process (production tolerances and errors) the displays may be
delivered with defective pixels. These potential defective pixels are not a display or HMI error or
defect, provided they are within the range of the specification below.
22.1.1
Terminology
Defective pixels Pixels or sub-pixels that do not perform as expected and are either always on
or always off.
Pixel
Image point on the display consisting of 3 sub-pixels in the basic colours red,
green and blue.
R G B
Dot
Sub-pixel in the basic colour red, green or blue.
or
or
Bright
Sub-pixel (dot) to which light is passing through, creating a bright dot that is on
Dark
Sub-pixel (dot) to which no light is passing through, creating a dark dot that is
off
adjacent dots
dots positioned next to one another,
horizontally, vertically or diagonally, bright or dark
(e.g. the following pattern and sub-pixels)
R G B R G B R G B R G B
R G B R G B R G B R G B
R G B R G B R G B R G B
Distance between
Definition of distance between two defective dots
Dots
horizontal, vertical or diagonal, bright or dark
(e.g. the following pattern and sub-pixels)
R G B R G B R G B R G B
R G B R G B R G B R G B
R G B R G B R G B R G B
R
G
B
