Maintenance
Power Panel C70 User's manual V1.30
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5.2 User tips for increasing the service life of the display or touch screen
Pixel errors
Information:
Displays can contain faulty pixels (pixel errors) due to the manufacturing process. They are not
grounds for initiating a complaint or warranty claim.
5.2.1 Service life
The maximum service life of the analog resistive touch screen is 10 million actuations.
The following diagram describes the force required to activate the touch screen over the course of its service life.
The requirements are the same as those for specifying a maximum of 10 million operations.
250
200
150
100
50
0
0
2,000,000
4,000,000
6,000,000
8,000,000 10,000,000
Typical force (g)
Actuations
5.2.2 Backlight
The service life of the backlight is specified by its "half-brightness time". An operating time of 50,000 hours would
mean that the display brightness would still be 50% after this time.
How can the service life of backlights be extended?
•
Set the display brightness to the lowest value comfortable for the eyes.
•
Use dark images.
•
Reducing the brightness by 50% can increase the half-brightness time by approximately 50%.
5.2.3 Image persistence
Image persistence refers to the "burning in" of a static image on a display after being displayed for a long time. It
does not only occur with static images, however. Image persistence is also referred to in the technical literature as
screen burn-in, image retention, memory effect, memory sticking or ghost image.
There are 2 different types:
•
Area type: This type can be seen in a dark gray image. The effect disappears if the display is switched
off for a long time.
•
Line type: This can result in permanent damage.
What causes image persistence?
•
Static images
•
No screensaver
•
Sharp transitions in contrast (e.g. black/white)
•
High ambient temperatures
•
Operation outside of specifications
