Luminance Control System Dynamic Sampling Frequency
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Solution Overview
Problem
Existing luminance controlling systems for electronic devices are limited in their ability to smoothly adjust luminance levels with changing ambient light conditions, leading to increased power consumption and costs due to the fixed number of selection switches and resistors.
Innovation Solution
The system reduces power consumption by dynamically adjusting the number of ignited light sources and sampling frequency based on detected luminance changes, and eliminates the need for digital components by using an analog luminance controlling approach, allowing for real-time luminance adjustments and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of luminance levels is increased to achieve smoother luminance adjustment, then the luminance control precision is improved, but the number of selection switches and resistors increase simultaneously, leading to increased device complexity and cost
Solution Approach 1:
The patent applies dynamics by making the sampling frequency adjustable rather than fixed. The system dynamically changes the sampling frequency based on the detected luminance level, using higher frequencies when luminance changes rapidly and lower frequencies when changes are slow. This dynamic adaptation allows the system to achieve smooth luminance control without requiring a large number of fixed switches and resistors, thereby resolving the contradiction between control precision and device complexity
Solution Approach 2:
The patent changes the parameter of sampling frequency adaptively. By adjusting the sampling frequency according to the rate of luminance change, the system optimizes its operation - using high sampling rates only when necessary for rapid changes and low sampling rates during stable periods. This parameter change approach enables effective luminance control with reduced hardware complexity, as the system can achieve smooth transitions without requiring excessive numbers of selection switches and resistors
2Speed
If the sampling frequency is increased to detect rapid luminance changes, then the response speed is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts the sampling frequency based on the detected luminance conditions. When rapid luminance changes are detected, the sampling frequency is increased to maintain fast response. When luminance is stable, the sampling frequency is reduced to minimize power consumption. This dynamic adjustment resolves the contradiction by making the response speed adaptive rather than constantly high, thereby reducing overall energy usage while maintaining necessary responsiveness
Solution Approach 2:
The patent implements periodic sampling with variable periods. Instead of continuous high-frequency sampling, the system uses periodic measurements where the period length adjusts based on luminance stability. During stable periods, longer intervals between samples reduce power consumption. During rapid change periods, the sampling period shortens automatically to maintain response speed. This periodic action with adaptive timing resolves the contradiction between response speed and power consumption
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 enables smoother luminance adjustments with changing light conditions, reducing power consumption and costs while maintaining effective luminance control, by selectively activating light sources and adjusting sampling frequencies.
Implementation Method 1
a light sensing apparatus, a digital luminance controlling apparatus and a light source controlling apparatus... When the light sensing apparatus detects the luminous intensity of the circumstance
Implementation Method 2
the analog signal is converted into digital signal in accordance with a preset sampling frequency by the analog-to-digital converter
Implementation Method 3
the light source controlling apparatus... adjusts the luminance of the light source according to the received luminance controlling signal
Data Source
AI summary
This invention provides an improved digital luminance controlling system, which can control the luminous intensity of an illuminating apparatus by choosing the number of the ignited luminaries. It optimizes the number of the ignited luminaries according to the different contribution rate of each luminary to the general luminous intensity to reduce the power consumption. By properly adjusting the sampling frequency of the luminous intensity of the circumstance, this invention could decrease the operating frequency of the luminance controlling system, thereby to further reduce the power consumption. This invention also provides a analog type of the luminance controlling system, which consists of a optical sensing apparatus, a analog type of the luminance controlling apparatus and a set of optical source and can realize a real time luminance adjustment, to reduce the power consumption.