LED Module White Light Color Temperature Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing LED modules that emit white light face challenges such as complexity and expense in applying phosphors, limited scalability, inhomogeneous light emission, and limited adjustability of color temperature and hue, with stability issues due to different temperature dependencies of red and blue LEDs.
Innovation Solution
An LED module with a single cover containing multiple phosphors over LED chips, allowing for continuous adjustment of color temperature and hue by varying the intensity and wavelength of LED chip radiation, eliminating the need for diffusers and simplifying phosphor application, and enabling better color mixing for homogeneous light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If phosphors are applied to individual LEDs or specific areas of LEDs, then color temperature adjustment is possible, but the process becomes complex and time-consuming
Solution Approach 1:
The patent combines multiple phosphors (first phosphor and second phosphor with different color temperatures) into a single cover structure that encases multiple LED chips. This merging approach eliminates the need for separate phosphor application processes on individual LEDs, simplifying manufacturing while maintaining color temperature adjustability through selective LED activation.
Solution Approach 2:
The single cover structure serves multiple functions: it houses multiple LED chips, contains multiple different phosphors, and enables color temperature adjustment. This multi-functional design replaces what would otherwise require multiple separate components and application steps, reducing overall system complexity.
2Adaptability or versatility
If multiple LEDs with different phosphors are used, then color temperature adjustment is possible, but the light emission becomes inhomogeneous
Solution Approach 1:
Multiple LED chips emitting different wavelengths are merged within a single cover containing multiple phosphors. The physical enclosure of the cover allows the light from different LEDs to mix and interact with the phosphors uniformly, producing homogeneous white light output while maintaining the ability to adjust color temperature by controlling individual LED intensities.
3Stability of the object's composition
If a diffuser is added to ensure light homogeneity, then light emission becomes more uniform, but efficiency is reduced
Solution Approach 1:
The patent extracts and eliminates the diffuser component from the LED module design. Instead of using a diffuser to achieve light homogeneity, the invention achieves uniform light output directly through the proper arrangement of multiple LED chips and phosphors within the cover, thereby avoiding the efficiency losses associated with diffuser materials.
4Manufacturing precision
If phosphor application is precisely controlled, then color accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple phosphors into a single integrated cover structure, eliminating the need for precise positioning of separate phosphor layers on individual LEDs. This approach maintains color accuracy through the inherent properties of the phosphor materials while dramatically simplifying the manufacturing process by reducing the number of precision assembly steps required.
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 provides a cost-effective, scalable, and highly homogeneous white light with continuous adjustability of color temperature between 2000-6500K, improving light efficiency and reducing production complexity.
Implementation Method 1
at least one phosphor is suitable for converting radiation from the first LED chip at least partially into a first light, and at least one other phosphor is suitable for converting radiation from the second LED chip at least partially into a second light
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A white light-emitting LED module (1) comprising at least one first LED chip (2) and at least one second LED chip (3). The LED module (1) also has a cover (4) that covers all LED chips (2, 3) and is provided with at least two different phosphors (5, 6). While at least one phosphor (5, 6) is capable of converting radiation from the first LED chip (2) at least partially into a first light, at least one other phosphor (5, 6) is capable of converting radiation from the second LED chip (3) at least partially into a second light. The white light of the LED module (1) contains at least the first and the second light. The color coordinates of the white light can also be changed by adjusting the intensity and/or the wavelength of the radiation from the first and/or the second LED chip (2, 3).