Dimming Glass Voltage Control via Gamma Correction
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Solution Overview
Problem
Existing dimming glass technologies fail to provide a satisfactory dimming effect due to linear correspondence between dimming levels and voltages, resulting in human eyes being unable to distinguish effectively between multiple dimming levels.
Innovation Solution
A method and device that adjust the voltage applied to dimming glass based on a corresponding relationship between dimming levels and actual light transmittance, dividing the adjustable range of light transmittance to achieve more distinguishable dimming levels, and considering ambient temperature for precise voltage adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If linear correspondence between dimming levels and voltages is used, then the control system is simple, but human eyes cannot distinguish multiple dimming levels effectively
Solution Approach 1:
The patent transforms the linear voltage-dimming relationship into a non-linear relationship by introducing a gamma correction formula (T = V^2.2 / 30^2.2). This parameter transformation allows the dimming glass to achieve perceptually uniform dimming levels that match human eye sensitivity, resolving the contradiction between simple control and effective discrimination.
2Productivity
If equal voltage steps are applied for dimming levels, then the voltage control is uniform, but the actual light transmittance does not match human perception
Solution Approach 1:
The patent applies gamma correction (exponent 2.2) to transform the voltage-transmittance relationship, ensuring that equal voltage steps produce perceptually equal transmittance steps as perceived by human eyes. This resolves the mismatch between uniform voltage control and accurate light transmittance perception.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the dimming effect by allowing human eyes to differentiate more dimming levels, enhancing user satisfaction through precise light transmittance adjustment based on actual light transmittance and temperature.
Implementation Method 1
dimming glasses are often used as windows in houses, motor vehicles or aircrafts, and can change light transmittance thereof by adjusting an input voltage
Data Source
AI summary
The present disclosure discloses a dimming method for a dimming glass, including: in response to a dimming level selected from a user, obtaining a light transmittance value corresponding to the selected dimming level according to a corresponding relationship between dimming levels and actual light transmittance of the dimming glass; obtaining a dimming voltage value corresponding to the light transmittance value according to a corresponding relationship between the actual light transmittance and dimming voltages of the dimming glass; and adjusting a voltage applied to the dimming glass to the obtained dimming voltage value, wherein the corresponding relationship between the dimming levels and the actual light transmittance of the dimming glass is dividing an adjustable range of the actual light transmittance of the dimming glass to obtain the actual light transmittance corresponding to different dimming levels. The present disclosure improves dimming effect of dimming glass.