Multi-Level Button Backlighting With Ambient-Light Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Home automation systems face challenges in providing consistent backlighting for control device buttons, as ambient lighting conditions, button color, and configuration can reduce readability and contrast, leading to difficulties in identifying selected buttons.
Innovation Solution
A control device with multiple-level backlighting and an ambient light detector that adjusts LED illumination intensities based on ambient light levels, ensuring consistent and clear button illumination by differentiating between selected and unselected buttons through varying LED intensities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform backlighting is applied to all buttons, then manufacturing is simple and device complexity is low, but readability and contrast between selected and unselected buttons deteriorate under varying ambient light conditions
Solution Approach 1:
The patent implements different backlighting intensities for different buttons based on their selection state. The selected button receives a first backlighting intensity while unselected buttons receive a second, lower intensity. This local differentiation improves readability and selection indication without requiring completely separate backlighting systems for each button.
Solution Approach 2:
The patent dynamically adjusts backlighting intensities based on ambient light conditions detected by a light sensor. The system modifies the intensity levels of both selected and unselected buttons according to the detected ambient light, ensuring optimal readability across different lighting environments while maintaining the differential intensity scheme.
2Illumination intensity
If higher backlighting intensity is used to improve visibility, then button readability improves, but energy consumption increases
Solution Approach 1:
The patent applies higher backlighting intensity only to the selected button while using lower intensity for unselected buttons. This localized high-intensity approach improves visibility of the most important information (the selected button) while reducing overall energy consumption compared to illuminating all buttons at high intensity.
Solution Approach 2:
The patent uses excessive backlighting intensity only when necessary - specifically for the selected button that requires clear indication. Unselected buttons receive partial illumination sufficient for basic visibility but not full intensity, optimizing the balance between visibility and energy consumption.
3Adaptability or versatility
If ambient light detection is added to dynamically adjust backlighting, then button readability under varying conditions improves, but device complexity increases
Solution Approach 1:
The patent incorporates an ambient light sensor that provides feedback to the control circuit about the current lighting conditions. The control circuit uses this feedback to automatically adjust the backlighting intensities, enabling adaptation to varying ambient light without requiring complex manual configuration or multiple fixed modes.
Solution Approach 2:
The control circuit performs multiple functions: it manages the differential backlighting for selected vs. unselected buttons, processes ambient light sensor input, and dynamically adjusts intensities based on detected conditions. This multi-functionality reduces the need for separate dedicated circuits for each function, thereby limiting the increase in overall device complexity.
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
The solution ensures consistent and clear button illumination across varying ambient light conditions, enhancing user readability and button differentiation, thereby improving the usability of home automation systems.
Implementation Method 1
A control device with multiple-level backlighting and an ambient light detector that adjusts LED illumination intensities based on ambient light levels
Implementation Method 2
The control device may include one or more buttons and have multiple-level backlighting... a first LED, a second LED, and a third LED. The first, second, and third LEDs may be configured to illuminate at least a portion of a respective one of the first, second, and third buttons
Data Source
AI summary
A control device may have a plurality of buttons that may be backlit to multiple levels, such as first, second, and third adjacent buttons positioned in order, and first, second, and third LEDs positioned to illuminate a respective button. The control device may be configured to illuminate the first LED to a first LED illumination intensity to illuminate the respective button to a first surface illumination intensity; illuminate the third LED to a second LED illumination intensity to illuminate the respective button to a second surface illumination intensity; and illuminate the second LED to a third LED illumination intensity to illuminate the respective button to the second surface illumination intensity. The third LED illumination intensity may be less than the second LED illumination intensity, which may be less than the first LED illumination intensity, and the second surface illumination intensity may be less than the first surface illumination intensity.