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Second try for this pull request. This time directly based on the dev branch.
Description
This PR improves the display backlight experience by addressing the non-linear nature of human brightness perception.
Changes:
rg_display.c. This ensures that brightness steps feel visually more uniform to the user.Why?
Human eyes are more sensitive to changes in dark areas than in bright ones. A linear PWM duty cycle feels "jumpy" at low levels and shows almost no visible change at high levels. Gamma correction fixes this.