Ambient Light Sensor Display Controller for Screen Visibility
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Solution Overview
Problem
Mobile communication terminals struggle to maintain screen visibility in high ambient light conditions due to limitations in setting brightness and saturation intensities, leading to increased power consumption and difficulty in displaying color tones effectively.
Innovation Solution
An electronic device with a display unit, sensor, and controller that measures ambient light intensity and adjusts display data by converting colors to complementary contrast colors, enhancing luminosity and saturation values using an S-curve or gamma-curve conversion, and storing these values to improve visibility without excessive power use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness intensity of the backlight is set higher than pre-existing brightness intensity, then the screen visibility is improved, but the power consumption is increased
Solution Approach 1:
The patent applies parameter changes by adjusting the brightness and saturation intensities of display pixels through S-curve or gamma-curve conversion algorithms. Instead of simply increasing backlight brightness, the system transforms the display data parameters to enhance perceived brightness and color saturation, thereby improving screen visibility without proportionally increasing power consumption.
2Illumination intensity
If the brightness and saturation intensities of each pixel are set higher than previously set, then the screen appears brighter, but the color tones cannot be shown brightly even with increased brightness intensity
Solution Approach 1:
The patent simultaneously adjusts both brightness and saturation parameters of display pixels using S-curve or gamma-curve conversion. This dual parameter adjustment ensures that when brightness intensity is increased, color saturation is also enhanced, preventing color tones from appearing washed out and maintaining vibrant color display under various lighting conditions.
Solution Approach 2:
The system dynamically adjusts brightness and saturation parameters based on ambient light conditions detected by sensors. The display adapts its parameters in real-time, applying different conversion curves depending on the lighting environment, which maintains optimal color tone visibility across varying ambient light levels without manual intervention.
3Illumination intensity
If the brightness intensity of the mobile communication terminal screen is set higher, then the screen can be shown brightly, but the configuration elements such as icons, texts, and background become difficult to recognize in high ambient light
Solution Approach 1:
The patent employs S-curve or gamma-curve conversion to non-linearly adjust brightness and saturation parameters. This transformation enhances the contrast between configuration elements (icons, texts) and background by optimally distributing brightness levels, making elements more distinguishable in high ambient light conditions while maintaining overall screen brightness.
Data Source
AI summary
Disclosed are an apparatus and a method for display of a screen according to brightness intensity of ambient light. One or more characteristic values configuring display data is set to be higher than a preset color characteristic value when measured brightness intensity of ambient light is higher than preset brightness intensity of ambient light, and one of the set color characteristic values is converted to a contrast characteristic value and is displayed. Therefore, even when brightness intensity of ambient light is high, the user can accurately view a screen.