Segmented Solid-State Diode Illuminator for Balanced Display Brightness
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Solution Overview
Problem
Existing display systems face challenges in achieving high brightness without increasing cost, size, and weight, and often result in unbalanced light output due to differences in gain among solid-state illuminators.
Innovation Solution
A light illuminator using a plurality of solid-state diodes that pump light into corresponding rods at selected wavelengths, with a processor controlling electric power to balance output and incorporating frequency multipliers and segmented diodes for efficient color creation and balanced light production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the size of the light source is increased to improve brightness, then image brightness is improved, but cost, size, and weight of the display system increase
Solution Approach 1:
The light source is divided into multiple separate laser diodes (red, green, blue) that are spatially separated and independently controlled. Each diode pumps a corresponding solid-state rod, allowing individual optimization of each color channel while maintaining compact overall system size.
Solution Approach 2:
The system uses independent current control for each laser diode to precisely adjust the intensity parameters of each color channel. This allows brightness optimization without increasing physical size, as electronic parameter adjustment replaces physical scaling.
2Illumination intensity
If the size of the light source is increased to improve brightness, then image brightness is improved, but heat generation increases
Solution Approach 1:
By segmenting the light source into separate laser diodes and solid-state rods, each component operates at optimized power levels with efficient heat dissipation paths. The modular structure prevents heat accumulation that would occur in a single large light source.
Solution Approach 2:
The system replaces traditional high-power incandescent or halogen bulbs with laser diodes and solid-state rods that convert electrical energy to light more efficiently. This substitution reduces waste heat generation while maintaining or improving brightness output.
3Manufacturing precision
If separate diodes are used for each color to improve color purity, then color purity is improved, but device complexity increases
Solution Approach 1:
The system is segmented into three independent color channels (red, green, blue), each with its own laser diode and solid-state rod. This segmentation achieves high color purity through specialized components for each wavelength while managing complexity through modular design and integrated control.
4Ease of operation
If the same current is provided to each diode to simplify control, then ease of operation is improved, but light output balance deteriorates
Solution Approach 1:
The control system independently adjusts the current parameters for each laser diode based on the specific gain characteristics of each solid-state rod. This parameter optimization ensures balanced light output across all color channels, compensating for manufacturing variations and aging effects.
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 enables efficient generation of balanced light at multiple wavelengths, reducing the need for large light sources and minimizing heat generation, while maintaining high brightness and color purity.
Implementation Method 1
each diode pumps light into a corresponding rod or rods at a wavelength that is selected from a first plurality of wavelengths of light
Implementation Method 2
each diode pumps light into a corresponding rod or rods... converting the received light at a first wavelength into a second wavelength
Implementation Method 3
a frequency multiplier associated with each of the rods that multiplies (typically doubles) the frequency of the light received from its corresponding rod to produce visible light
Data Source
AI summary
The disclosure in one aspect provides an illuminator that includes a plurality of segmented diodes to generate a plurality of light beams. In another aspect, the illuminator may independently control current to some or all of the diodes.