B&R MAPPC700A-ENG, Руководство пользователя

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Commissioning • User tips for increasing the display lifespan
Chapter 3
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241 Panel PC 700 with 945GME N270 CPU board User's Manual V 1.16
9. User tips for increasing the display lifespan
9.1 Backlight
The lifespan of the backlight is specified in "Half Brightness Time". An operating time of 50,000
hours would mean that the display brightness would still be 50% after this time.
9.1.1 How can the lifespan of backlights be extended?
• Set the display brightness to the lowest value that is still comfortable for the eyes
• Use dark images
• Reducing the brightness by 50% can result in an approximate 50% increase of the half-
brightness time.
9.2 Image sticking
Image sticking is the "burning in" of a static image on a display after being displayed for a
prolonged period of time. However, this does not only occur with static images. Image sticking
is known in technical literature as the "burn-in effect", "image retention", "memory effect",
"memory sticking" or "ghost image".
There are 2 types of this:
• Area type: This is seen with a dark gray image. The effect disappears if the display is
switched off for a longer period of time.
• Line type: This can cause lasting damage.
9.2.1 What causes image sticking?
• Static images
• Screensaver not enabled
• Sharp contrast transitions (e.g. black / white)
• High ambient temperatures
• Operation outside of the specifications
9.2.2 How can image sticking be avoided?
• continual change between static and dynamic images
• avoiding excessive brightness contrast between foreground and background display
• use of colors with similar brightness
• use of complementary colors in subsequent images
• use of screensavers