User Tips For Increasing The Service Life Of The Display Or Touch Screen; Service Life; Backlight; Image Persistence - B&R Power Panel T30 User Manual

7.2 User tips for increasing the service life of the display or touch screen

Pixel errors
Information:
Displays may contain defective pixels (pixel errors) that result from the manufacturing process. They
are not grounds for initiating a complaint or warranty claim.

7.2.1 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.

7.2.2 Backlight

The service life of the backlight is specified by its "half-brightness time". An operating time of 50,000 would mean
that the display would still retain 50% of its brightness after this time.
How can the service life of backlights be extended?
• Setting the display brightness to the lowest value that is still comfortable for the eyes
• Using dark images
• Reducing the brightness by 50% can increase the half-brightness time by approximately 50%.

7.2.3 Image persistence

Image persistence refers to the "burning in" of a static image on a display after being displayed for a prolonged
period of time. This not only occurs with static images, however. Image persistence is also referred to in the
technical literature as burn-in effect, image retention, memory effect, memory sticking or ghost image.
There are basically 2 types:
• Area type: This type is characterized by a dark gray image. The effect disappears if the display is switched
off for a long period of time.
• Line type: 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
Power Panel T30 User's manual V1.42 - Translation of the original documentation
250
200
150
100
50
0
0 2,000,000 4,000,000 6,000,000
Actuations
8,000,000 10,000,000
Maintenance
125