Multi-Chip Light Emitters with Spatial Offsets for Uniform White Light
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Solution Overview
Problem
Current lighting technologies, particularly incandescent and fluorescent lights, are inefficient in energy usage and have limitations in color reproduction, with solid state light emitters like LEDs offering better efficiency but struggling to produce white light effectively due to their concentrated emission spectra.
Innovation Solution
The use of multi-chip light emitters with spatially offset solid state light emitters emitting different hues, combined with collimating total internal reflection (TIR) lenses, to achieve uniform color mixing and efficient white light production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If solid state light emitters are used to improve energy efficiency, then energy consumption is reduced, but color reproduction quality deteriorates due to concentrated emission spectra
Solution Approach 1:
The invention divides the light emission function into multiple solid state light emitters, each emitting different hues (e.g., blue, green, red). By segmenting the emission spectrum across multiple chips rather than relying on a single emitter's concentrated spectrum, the system achieves both energy efficiency and improved color reproduction quality.
Solution Approach 2:
The invention combines multiple solid state light emitters with different emission hues into a single lighting device. The light outputs from these multiple emitters are merged and mixed to produce combined light with superior color reproduction while maintaining the energy efficiency benefits of solid state technology.
2Device complexity
If single-chip light emitters are used to simplify device structure, then device complexity is reduced, but light output uniformity deteriorates
Solution Approach 1:
Instead of using a single complex emitter, the invention segments the light source into multiple simpler solid state light emitters. Each emitter maintains simple construction, but their combination achieves uniform light output through proper spatial arrangement and optical mixing, resolving the contradiction between simplicity and uniformity.
3Quantity of substance
If traditional lighting devices are used to reduce initial cost, then device cost is reduced, but energy consumption increases
Solution Approach 1:
The invention changes the operational parameters of solid state light emitters by controlling the intensity and combination of multiple hues. This allows optimization of both initial device cost and energy consumption by selecting appropriate emitter combinations and drive conditions, achieving lower energy consumption without excessive cost increase.
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
This approach results in effective color mixing and uniformity of light output, overcoming the inefficiencies of traditional lighting and providing high-efficiency, long-lasting white lighting solutions.
Implementation Method 1
Solid state light emitters (e.g., light emitting diodes) are receiving much attention due to their energy efficiency
Implementation Method 2
light emitting diodes have typical lifetimes between 50,000 and 70,000 hours
Implementation Method 3
collimating total internal reflection (TIR) lenses, to achieve uniform color mixing and efficient white light production
Data Source
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AI summary
A lighting device in which a solid state light emitter in a first multi-chip light emitter is spatially offset relative to a solid state light emitter in a second multi-chip light emitter. A lighting device comprising first, second and third multi-chip light emitters, in which any solid state light emitter in the second multi-chip light emitter that is spatially offset relative to a first solid state light emitter on the first multi-chip light emitter by less than 10 degrees emits light of a hue that differs from the hue of light emitted by the first solid state light emitter by more than seven MacAdam ellipses. A solid state light emitter support member comprising a center region and st least first, second and third protrusions extending from the center region. A lighting device comprising at least a first housing member, and means for emitting substantially uniform light.