Backlit Keyboard White Point Adjustment via Ambient Light Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices face challenges in maintaining visually appealing appearances of keyboard keys and displays due to changes in ambient lighting conditions, leading to potential mismatches in color and intensity that affect user experience.
Innovation Solution
The implementation of a dynamic function row with a backlit keyboard and color ambient light sensors that adjust the white point of displays based on ambient light color and intensity, using light-emitting diodes for backlight illumination and a white point adaptation scaling factor to minimize visual conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the keyboard backlight intensity and display brightness are increased to maintain visibility in bright ambient light, then the visibility of keyboard keys and display content is improved, but the energy consumption increases
Solution Approach 1:
The system dynamically adjusts the white point and intensity of keyboard backlight and display brightness based on real-time ambient light conditions detected by the ambient light sensor. This allows the illumination intensity to be optimized for visibility while minimizing energy consumption by avoiding excessive brightness in lower light conditions.
Solution Approach 2:
The ambient light sensor continuously monitors ambient light conditions and provides feedback to the control circuitry, which automatically adjusts the keyboard backlight and display brightness levels. This closed-loop feedback system ensures optimal visibility while preventing unnecessary energy consumption by adapting illumination levels to actual environmental conditions.
2Illumination intensity
If the white point of the display is adjusted to match ambient light color, then the visual appeal and color accuracy are improved, but the device complexity increases
Solution Approach 1:
The display white point is dynamically adjusted based on ambient light color measurements from the ambient light sensor. The control circuitry modifies the display's color temperature and white point characteristics in real-time to match varying ambient lighting conditions, maintaining visual appeal without requiring complex manual intervention.
Solution Approach 2:
The system performs self-adjustment of the display white point by automatically sensing ambient light conditions and modifying its own color output characteristics. This self-service capability maintains color accuracy and visual appeal without requiring external calibration tools or complex user configuration, effectively managing device complexity through automation.
3Illumination intensity
If the keyboard backlight color is changed to match ambient light conditions, then the visual harmony between keyboard and display is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The keyboard backlight color is dynamically adjusted to match ambient light conditions through real-time control of LED characteristics. The system modifies the spectral output of the backlight LEDs based on ambient light sensor data, achieving visual harmony between keyboard and display without requiring extremely tight manufacturing tolerances on individual components.
Solution Approach 2:
The system changes the operational parameters of the keyboard backlight LEDs (such as drive current and pulse width modulation duty cycle) to adjust color output dynamically. This parameter-based control allows flexible color matching to ambient conditions while maintaining reasonable manufacturing specifications for the LED components themselves.
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
This solution ensures that the appearance of keyboard keys and display content are harmonized, providing an aesthetically pleasing user experience by dynamically adjusting the white point of displays to match the apparent color of keyboard keys, reducing visual conflicts and enhancing visual appeal across varying lighting conditions.
Implementation Method 1
The keyboard may have light-emitting diodes that emit backlight illumination for the glyphs
Implementation Method 2
A color ambient light sensor may measure ambient light color and intensity
Data Source
AI summary
An electronic device may have a main display and an ancillary display that forms a dynamic function row. The device may also have a backlit keyboard with glyphs. The keyboard may have light-emitting diodes that emit backlight illumination. The backlight illumination has a backlight illumination color and intensity. A color ambient light sensor may measure ambient light color and intensity. Control circuitry in the laptop computer may make white point adjustments to the main and ancillary displays. White point adjustments may be made based on factors such as the backlight illumination intensity, information on the nominal white point of a display (which may be comparable to the color of the backlight illumination), information on the ambient light color and intensity, and a white point adaptation scaling factor.