Multi-rank LED Chip Mixing for Chromaticity Control
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Solution Overview
Problem
Existing light emitting diode (LED) devices often use single-rank LED chips, which limit their ability to achieve a target chromaticity and result in reduced chip yield and package yield due to the uniformity of peak wavelengths, restricting their color gamut and brightness distribution.
Innovation Solution
A light emitting apparatus comprising multiple LED chips of different ranks, where each chip emits light of a specific rank within a color gamut, allowing for the mixing of light to achieve a target chromaticity distribution by combining LED chips with varying peak wavelengths and chromaticity ranks, thereby improving the usage yield and color gamut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If single-rank LED chips are used, then manufacturing uniformity is improved, but chip yield and package yield are reduced
Solution Approach 1:
The patent changes the parameter of LED chip rank from uniform single-rank to varied multi-rank distribution. By intentionally introducing different ranks (peak wavelengths) of LED chips, the system achieves target chromaticity while improving overall yield. This resolves the contradiction by transforming the uniformity parameter into a controlled distribution of multiple parameters.
Solution Approach 2:
The patent creates a composite light emitting system by combining multiple LED chip types with different ranks. Instead of using identical single-rank chips, the invention integrates chips with varying peak wavelengths and chromaticity characteristics to achieve the desired target chromaticity distribution, thereby improving both yield and color performance.
2Device complexity
If single-rank LED chips are used, then device simplicity is improved, but color gamut is restricted
Solution Approach 1:
The patent expands the chromaticity parameter space by incorporating LED chips with different ranks (varying peak wavelengths). This parameter diversification enables the system to achieve a broader color gamut and target specific chromaticity distributions, resolving the contradiction between simplicity and color versatility.
Solution Approach 2:
The patent transitions from a one-dimensional uniform rank configuration to a multi-dimensional chromaticity space by incorporating LEDs with varying peak wavelengths and chromaticity coordinates. This dimensional expansion allows the system to access a wider color gamut while maintaining a manageable device structure through systematic arrangement.
3Device complexity
If single-rank LED chips are used, then device simplicity is improved, but brightness distribution is restricted
Solution Approach 1:
The patent modifies the brightness distribution by introducing LED chips with different ranks and varying luminous intensities. By controlling the distribution of these parameters across multiple chips, the system achieves improved overall brightness characteristics and uniformity, resolving the contradiction between simple configuration and performance optimization.
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 multi-rank LED configuration enhances the usage yield and color gamut by allowing for the creation of a target chromaticity distribution, improving the brightness and chromaticity distribution, and expanding the range of achievable colors beyond what single-rank devices can produce.
Implementation Method 1
a first light emitting device including a first light emitting diode chip configured to emit light of a first rank included in a first color gamut, and a second light emitting device including a second light emitting diode chip configured to emit light of a second rank included in the first color gamut
Data Source
AI summary
A light emitting apparatus including a first light emitting device including a first light emitting diode chip configured to emit light of a first rank included in a first color gamut, and a second light emitting device including a second light emitting diode chip configured to emit light of a second rank included in the first color gamut, in which the first rank is different than the second rank. In addition, the first and second light emitting devices are arranged in relation to each other such that the light emitted by the first emitting device mixes with light emitted by the second light emitting device to form light of a third rank different than the first and second ranks.