LED Light Combining Control for Temperature-Stable Color Output
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Solution Overview
Problem
Existing methods for combining light, such as using LEDs, suffer from significant color temperature drift due to temperature changes, which affect illuminance and color coordinates.
Innovation Solution
A method and device that determine the corresponding relationship between control degree and illuminance of LEDs at a current sampling temperature, allowing for compensating illuminance changes to mitigate color temperature drift by controlling each LED based on a target light combining value and the determined relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LED illuminance is used for light combining, then light combining efficiency is improved, but color temperature drift occurs due to temperature changes
Solution Approach 1:
The patent pre-establishes the corresponding relationship between control degree and illuminance at different temperatures through offline calibration. During actual operation, the system only needs to query the pre-stored relationship data based on current temperature, avoiding real-time complex calculations and enabling rapid compensation while maintaining color temperature stability
Solution Approach 2:
The patent implements a feedback mechanism by continuously monitoring the temperature of LEDs and dynamically adjusting the control degree based on the pre-stored corresponding relationships. When temperature changes are detected, the system automatically retrieves the appropriate illuminance-control degree mapping from memory and adjusts the LED output accordingly, forming a closed-loop control system that maintains stable color temperature
2Stability of the object's composition
If control degree is adjusted to compensate temperature changes, then color temperature stability is improved, but system complexity increases
Solution Approach 1:
The patent performs the complex calibration work in advance, establishing lookup tables that map temperature values to corresponding control degrees and illuminance relationships. During runtime, the system simply queries these pre-computed tables based on measured temperature, reducing real-time computational burden and simplifying the control logic while maintaining accurate color temperature compensation
Solution Approach 2:
The patent introduces a lookup table as an intermediary data structure that stores the pre-calibrated corresponding relationships between control degree, illuminance, and temperature. This intermediary layer decouples the complex calibration data from the real-time control logic, allowing the control system to operate with simple table lookups rather than complex real-time calculations
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
Compensates for illuminance changes in LEDs due to temperature fluctuations, effectively stabilizing color temperature by adjusting control degrees to achieve the desired light combining value.
Implementation Method 1
A Light Emitting Diode (LED) can efficiently convert electrical energy into light energy
Implementation Method 2
with change of temperature, illuminance of LED changes greatly, causing color temperature to drift
Data Source
AI summary
The present disclosure discloses a method of combining light, an intelligent terminal and a storage medium. The method includes: according to a current sampling temperature, determining corresponding relationship between control degree and illuminance of each of LEDs at the current sampling temperature; according to a target light combining value and the corresponding relationship between the control degree and the illuminance of each of the LEDs at the current sampling temperature, determining control degree of each of the LEDs at the current sampling temperature; according to the control degree of each of the LEDs at the current sampling temperature, controlling each of the LEDs to combine light.