Poor contrast for fonts and icons

Technical Support
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1

We recently ported our application from PXA320 / WinCE 6.0 to iMX6 / WinEC7. We realized that there are small differences in contrast for the two systems even though the display is the same. The contrast is slightly worse on the newer system (iMX6 / WinEC7). See attached images for comparison.

Is there a way to increase the contrast?

2

Just an idea: try to change registry
HKLM\system\gdi\cleartypesettings\enabled

3

Dear @widtmann,

Thanks for @Frax222 suggestion, that may help you to get similar PXA display output.

Related links :
https://docs.microsoft.com/en-us/previous-versions/windows/embedded/ee482851(v=winembedded.70)

https://social.msdn.microsoft.com/Forums/en-US/ebd05aa8-9ae8-422f-a6fe-c36c7f1a9045/wec7-fonts-for-displaying-large-characters-smoothly?forum=winembplatdev

Also, play around to match

[HKEY_LOCAL_MACHINE\SYSTEM\GDI\Gamma]
    "Gamma Value"=dword:000006A4

Please let us know if you have any other questions.

4

After changing following registry entries the contrast is better:

HKEY_LOCAL_MACHINE\SYSTEM\GDI\ClearTypeSettings
 "Enabled"=dword:1

;Gamma adjustment (value range 1000...2200)
[HKEY_LOCAL_MACHINE\System\GDI\Gamma]  
"Gamma Value"=dword:1000

Thank you for your help.