Adaptive LED Illumination System for Display Color Accuracy
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Solution Overview
Problem
Existing illumination systems fail to maintain accurate color representation on displays like LCD screens when ambient light conditions change, causing color shifts due to variations in color temperature, such as from using bulbs with different color temperatures.
Innovation Solution
An illumination system with a control module, a first light detection module, and a second light detection module that calculates a reference spectral distribution based on ambient light and adjusts the illumination module to emit light matching this distribution, ensuring consistent color representation across varying ambient conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the illumination system uses a fixed spectral distribution to maintain stable illumination, then the illumination intensity remains consistent, but the color display becomes inaccurate when ambient light color temperature changes
Solution Approach 1:
The patent implements dynamic adjustment of the illumination spectral distribution based on detected ambient light conditions. The control module continuously monitors ambient light color temperature and adjusts the LED driving currents accordingly, transforming the system from a static fixed-spectral design to a dynamic adaptive one that maintains color accuracy across varying environmental conditions.
Solution Approach 2:
The system employs a feedback mechanism where the detection module measures ambient light characteristics and feeds this information to the control module. The control module then adjusts the illumination spectral distribution based on this feedback, creating a closed-loop control system that automatically compensates for ambient light variations and maintains accurate color display.
2Manufacturing precision
If the illumination system adjusts the spectral distribution to match ambient light, then color display accuracy improves, but the system complexity increases
Solution Approach 1:
The patent divides the illumination system into functionally independent modules: a light detection module for measuring ambient light, a control module for processing detection data and calculating spectral distribution, and an illumination module with independently controllable LEDs. This segmentation allows each module to perform its specific function efficiently while reducing overall system complexity through modular design.
Solution Approach 2:
The control module serves multiple functions: it processes detection data from the light detection module, calculates the appropriate spectral distribution based on ambient conditions, generates driving signals for the LEDs, and adjusts illumination intensity. This multi-functionality reduces the need for separate dedicated components, thereby simplifying the overall system structure while maintaining color display accuracy.
3Adaptability or versatility
If the illumination system uses multiple light emitting diodes with different colors, then the spectral distribution can be adjusted, but the device complexity increases
Solution Approach 1:
The patent achieves spectral distribution adjustment by changing the driving parameters (current intensity) of fixed-color LEDs rather than physically changing the LED components. The control module varies the driving currents of red, green, and blue LEDs to synthesize different spectral distributions, allowing flexible spectral adjustment without adding complex mechanical or optical switching mechanisms.
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 system effectively compensates for ambient light changes, maintaining accurate color display on screens by adjusting the illumination to match the reference spectral distribution, thereby preventing color shifts and ensuring comfortable viewing.
Implementation Method 1
The light detection module 13 comprises a red light sensor 131, a green light sensor 132 and a blue light sensor 133, for detecting the intensity of lights produced by the red light emitting diode 121, the green light emitting diode 122 and the blue light emitting diode 123 respectively
Implementation Method 2
The illumination module 12 comprises a red light emitting diode 121, a green light emitting diode 122 and a blue light emitting diode 123
Data Source
AI summary
This invention discloses an illumination method and an illumination control method. An embodiment of the illumination system includes two light detection modules for detecting a light produced by a light emitting diode and an ambient light, calculating a reference spectral distribution based on a detection result of the ambient light, comparing the detection result of the light emitting diode with the reference spectral distribution, and driving the illumination module to emit a light matching with the reference spectral distribution based on a comparison result. Another embodiment of the illumination system includes a light detection module for periodically switching the light emitting diode to emit light and stop emitting light. When the light emitting diode stops an illumination period, the light detection module detects an ambient light, and when the light emitting diode continues an illumination period, the light detection module detects a light produced by the light emitting diode.