Polarized Light Splitting for Adjustable Multi-Lens Projection
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Solution Overview
Problem
Conventional multi-lens optical systems face challenges in adjusting the light beam allocation to lenses, leading to inconsistent light intensities and increased assembly complexity due to fixed light beam allocation.
Innovation Solution
An optical system with a light adjustment component, such as a rotatable half-wave plate, dynamically adjusts the ratio of S-polarized and P-polarized light beams, allowing flexible allocation to multiple lenses, and includes spatial light modulators for image formation and projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a light source is positioned close to the display panel to achieve thin display device design, then the display device can be made thinner and more compact, but the light source may be damaged by heat from the backlight unit
Solution Approach 1:
A heat-resistant layer is introduced as an intermediary between the light source and the backlight unit. This layer acts as a thermal barrier that protects the light source from heat generated by the backlight unit, allowing the light source to be positioned close to the display panel without compromising its durability. The heat-resistant layer has a heat reflection coefficient of 0.5 or more, effectively reflecting heat away from the light source while maintaining the thin design.
2Ease of manufacture
If conventional materials like polyethylene terephthalate are used for the light source protective layer, then the structure is simple and easy to manufacture, but the material cannot withstand temperatures above its glass transition temperature causing yellowing and performance degradation
Solution Approach 1:
The patent employs composite material structures for the heat-resistant layer. Specifically, it uses inorganic materials such as silicon oxide, silicon nitride, or silicon oxynitride that can withstand high temperatures. These materials can be deposited in multiple layers with different compositions and thicknesses to achieve both heat resistance and desired optical properties. The composite structure maintains manufacturing feasibility through established semiconductor fabrication techniques while providing superior thermal stability compared to conventional organic materials.
3Illumination intensity
If the light source protective layer has high light extraction efficiency to improve display brightness, then more light can be extracted from the light source, but the layer may accumulate static electricity damaging the light source
Solution Approach 1:
An intermediary layer structure is designed between the light source and the external environment. This includes a heat-resistant layer with specific dielectric properties that can dissipate static electricity while maintaining high light extraction efficiency. The layer is engineered with controlled dielectric constants and thickness to balance electrical charge dissipation with optical performance, preventing static accumulation that could damage the light source.
Solution Approach 2:
The patent optimizes physical and chemical parameters of the protective layers, including dielectric constant, thickness, and material composition, to achieve the desired balance between light extraction efficiency and static electricity management. By carefully controlling these parameters, the system maintains high brightness while preventing harmful static charge accumulation on the light source.
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 system resolves light intensity inconsistencies and reduces design complexity while enabling large-format projection, 3D display, and autostereoscopy with reduced costs.
Implementation Method 1
the heat-resistant layer having a heat reflection coefficient of 0.5 or more
Implementation Method 2
an optical system including a light source, a reflective sheet, a polarization converter, and a prism array
Implementation Method 3
a reflective sheet
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An optical system, an illumination system, and a display system are provided. The optical system includes at least a light source component (10), a light adjustment component (20), a first polarization beamsplitter mirror component (30), a first lens component (41), and a second lens component (42). The light source component (10) is configured to generate a light beam including S-polarized light and P-polarized light. The light adjustment component (20) is configured to adjust a ratio of the S-polarized light and a ratio of the P-polarized light in the light beam. The first polarization beamsplitter mirror component (30) is configured to split a light beam adjusted by the light adjustment component (20) into a first light beam and a second light beam, where the first light beam is a light beam of the S-polarized light, and the second light beam is a light beam of the P-polarized light. The first lens component (41) is configured to project the first light beam or a modulated first light beam to a first region. The second lens component (42) is configured to project the second light beam or a modulated second light beam to a second region. In the optical system provided in embodiments of this application, split ratios in a multi-lens optical system are dynamically adjustable.