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27 lines
902 B
Plaintext
27 lines
902 B
Plaintext
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What: /sys/class/backlight/<backlight>/scale
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Date: July 2019
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KernelVersion: 5.4
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Contact: Daniel Thompson <daniel.thompson@linaro.org>
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Description:
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Description of the scale of the brightness curve.
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The human eye senses brightness approximately logarithmically,
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hence linear changes in brightness are perceived as being
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non-linear. To achieve a linear perception of brightness changes
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controls like sliders need to apply a logarithmic mapping for
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backlights with a linear brightness curve.
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Possible values of the attribute are:
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unknown
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The scale of the brightness curve is unknown.
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linear
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The brightness changes linearly with each step. Brightness
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controls should apply a logarithmic mapping for a linear
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perception.
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non-linear
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The brightness changes non-linearly with each step. Brightness
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controls should use a linear mapping for a linear perception.
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