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LCD burn in

Submitted by Simetrija on January 7, 2021

Hello,

i designed a product that includes a DT022ctft LCD and now i have approximately 50 to 60 products in the field for about a year and a half and on some of them, an LCD burn-in appeared. Since its a high precision environmental sensing system, the display displays same image all the time, except with few values that change on the GUI. 

Can i prevent burn-in simply by periodically turning off backlight (for example, for 5s every 5min) or do i have to actually change color of the individual pixels or simply reseting whole display?

Replies

engineering_seacomp's picture
engineering_seacomp
January 11, 2021

Hi,

Please see the following white paper, which also applies to smaller displays.

https://www.dropbox.com/s/u1li3khc7pzxa5q/Image_Persistence.pdf?dl=0

Turning off the backlight is good, to save the backlight LEDs.  However, it does not address image persistence, as this a function of the TFT driver.  You could turn off the TFT driver (which is a "power" command for the ILI9341).