Back to results
US 9,070,317 B2Granted
Device and method of automatic display brightness control
AssigneeQuanta Computer Inc.
InventorTung-Lin Chuang
Life of this patent
Estimating the term…
Abstract
A device and a method of automatic display brightness control are provided. Human fatigue index and environmental factors for dry eyes are combined as an indicator to dynamically adjust the display brightness. Heart rate variability (HRV) is used as the human fatigue index, and the environmental CO2 concentration is used as the environmental factors for dry eyes here.
Claims9
An automatic display brightness control device, the device comprising:
- a display;
- a carbon dioxide sensor for detecting an environmental carbon dioxide concentration [CO2];
- an electrocardiographic electrode for measuring an electrocardiography of a user;
- and
- a calculating device for receiving the carbon dioxide concentration [CO2] and the electrocardiography to calculate a weighted value A of the carbon dioxide concentration [CO2] and a weighted value B of heart rate variability (HRV), whereby a display brightness adjustment index Z and an adjusted display brightness Dadj are calculated and used to adjust display brightness of the display, wherein Z is equal to C1×A+C2×B, C1 is ranged from 1 to 5, and C2 is ranged from 1 to 10.
2 more elements
An automatic display brightness control method, the method comprising:
- measuring an environmental carbon dioxide concentration [CO2];
- measuring and recording an electrocardiography of a user;
- receiving the environmental carbon dioxide concentration [CO2] and the electrocardiography;
- calculating a weighted value A of the carbon dioxide concentration [CO2] and a weighted value B of heart rate variability;
- and
- calculating an adjusted display brightness Dadj by the weighted value A of the carbon dioxide concentration [CO2] and the weighted value B of heart rate variability.
3 more elements
Dependencies are inferred from the claim text.