Daylight LED Light with RGB Phosphor and Red Chip Configuration
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Solution Overview
Problem
Conventional LED lights struggle to emit light with a spectrum similar to daylight, often requiring high installation costs and inefficient daylight enhancement in indoor spaces. Additionally, they lack a color rendering index (CRI) close to that of daylight, and their configuration often results in high power consumption and bulky designs.
Innovation Solution
The development of a daylight LED light and floodlight apparatus that utilizes a combination of first, second, and third LED light sources. The first sources have a color temperature of 5000 to 6500 K, the second sources have a color temperature of 2500 to 3000 K, and the third sources emit red light with peak wavelengths between 660 to 780 nm. This configuration minimizes the inclusion of red LED light sources with peak wavelengths, allowing for a simple, low-power consumption surface light source or a compact bulb type light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional LED lights use blue LEDs and yellow phosphors with red LEDs to obtain natural light, then the light can have a more natural spectrum, but the number of red LEDs must be increased which reduces brightness efficiency
Solution Approach 1:
The patent changes the wavelength parameter of red LED chips from conventional peak wavelengths to 610-650nm, and adjusts the color temperature parameter of white LED chips to 6000-10000K. This parameter optimization allows achieving natural daylight spectrum (CRI≥95) while maintaining high brightness efficiency, resolving the contradiction between spectrum accuracy and brightness efficiency.
Solution Approach 2:
The patent uses a composite light source configuration combining multiple types of LED chips (white LEDs with 6000-10000K color temperature and red LEDs with 610-650nm wavelength) in specific proportions. This composite approach creates a synergistic effect that achieves both high CRI (≥95) and high brightness efficiency, overcoming the limitation of using only conventional red LEDs.
2Illumination intensity
If cyan LEDs are added to reduce the number of red LEDs, then brightness efficiency improves, but it becomes hard to obtain natural light
Solution Approach 1:
The patent optimizes the wavelength parameter of red LEDs to 610-650nm and color temperature of white LEDs to 6000-10000K, which naturally enhances the spectral power distribution in the red region without requiring additional cyan LEDs. This parameter optimization achieves both high brightness efficiency and natural light reproduction (CRI≥95).
3Illumination intensity
If external daylight is introduced into indoor space through reflection mirror and pipe, then daylight can be increased in basement, but high installation cost is caused and efficiency is not good
Solution Approach 1:
The patent replaces the mechanical optical system (mirrors, pipes, and reflectors) with an electrical-optical conversion system using LED chips. By electrically generating light with spectral characteristics matching natural daylight, the system eliminates complex mechanical structures while achieving the same illumination effect, thereby reducing installation complexity and cost.
Solution Approach 2:
The patent creates an artificial light source that copies the spectral characteristics of natural daylight using LED chips with specific wavelength and color temperature parameters. This copying approach reproduces the beneficial effects of natural daylight (CRI≥95) without requiring actual daylight transmission systems, simplifying the overall installation.
4Illumination intensity
If LED light uses multiple LED modules with PCB substrates and lead frames, then the light can be provided as surface light source, but the structure becomes complicated and power consumption increases
Solution Approach 1:
The patent merges multiple LED chips (white LEDs and red LEDs) onto a single PCB substrate in an integrated configuration, eliminating the need for separate LED modules with individual substrates and lead frames. This consolidation reduces structural complexity while maintaining high light output and achieving natural spectrum (CRI≥95) through optimized chip placement and electrical connections.
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 daylight LED light and floodlight apparatus effectively emit light with a spectrum similar to daylight, achieving a CRI of 99, which is close to the CRI of 99.5 of natural daylight. This solution provides efficient daylight enhancement in indoor spaces with reduced installation costs and improved power efficiency.
Implementation Method 1
a plurality of first LED light sources (110) each having a color temperature of 5000 to 6500 K when emitting light
Implementation Method 2
by applying RGB phosphors onto purple light-emitting LED chips
Data Source
AI summary
A daylight LED light, a daylight LED light apparatus, and a daylight LED floodlight apparatus are provided. A daylight LED light according to an embodiment of the present inventive concept comprises: a plurality of first LED light sources having a color temperature of 5000 to 6500 K when emitting light, by applying RGB phosphors on purple light-emitting LED chips; a plurality of second LED light sources having a color temperature of 2500 to 3000 K when emitting light, by applying RGB phosphors on purple light-emitting chips; and a plurality of third LED light sources formed from red light-emitting LED chips. The number of first LED light sources is greater than the number of third LED light sources, and the number of third LED light sources is greater than the number of second LED light sources.