Display System Light Cone Angle Control for Aberration Reduction
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Solution Overview
Problem
Existing display systems suffer from spherical aberration and astigmatism due to large light-cone angles in internal reflection prisms, leading to distortion, color deviation, and poor image quality due to varying dispersion degrees of light spots on photoelectric modulators.
Innovation Solution
A display system with a light source, optical processing assembly, and reflection device, where the light source emits beams at a preset light-cone angle, and a spatial light modulator with controllable units adjusts the light beams to reduce dispersion, using a preset angle of inclination between relay lenses to minimize aberration and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an internal reflection prism is used to change propagation direction of light, then the light propagation direction is changed, but the large light-cone angle causes spherical aberration and astigmatism resulting in large difference in dispersion degrees of light spots on the photoelectric modulator
Solution Approach 1:
The patent changes the light-cone angle parameter from a large angle to a preset small angle (≤30 degrees) by redesigning the optical path through relay lenses and reflection devices. This parameter change reduces spherical aberration and astigmatism, thereby reducing the difference in dispersion degrees of light spots on the photoelectric modulator while still achieving light direction control
Solution Approach 2:
The patent introduces relay lenses and a reflection device as intermediary optical elements between the light source and photoelectric modulator. These intermediaries redirect the light path to achieve the desired propagation direction change while maintaining a small light-cone angle, avoiding the direct use of internal reflection prisms that cause large aberrations
2Reliability
If two photoelectric modulators are required to control a light beam, then the light beam control is achieved, but the structure becomes complex and error-prone
Solution Approach 1:
The patent merges the functions of two separate photoelectric modulators into a single photoelectric modulator by using an array of solid-state light sources with independent intensity control. This combination maintains the light beam control capability while reducing the device complexity and eliminating errors associated with multiple modulators
Solution Approach 2:
The single photoelectric modulator in the patent performs multiple functions: it modulates the light beam while the array of solid-state light sources provides intensity control. This multi-functional approach replaces the need for two specialized modulators, simplifying the overall system structure
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 configuration reduces the difference in dispersion degrees of light spots, minimizing distortion and color deviation, thereby enhancing imaging quality and display effect by precisely controlling light beams at both the light source and spatial light modulator ends.
Implementation Method 1
The reflection device is configured to reflect the plurality of light beams from the optical processing assembly to the light modulator
Implementation Method 2
The optical processing assembly is configured to perform a light path adjustment on each light beam of the plurality of light beams from the light source device in such a manner that the light beam irradiates on the reflection device at a preset light-cone angle
Implementation Method 3
The light modulator includes a plurality of sets of controllable units. The light modulator is configured to modulate the light beam by each controllable unit, so as to emit desired display light
Data Source
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AI summary
A display system and method are provided. The display system includes a light source device (10), an optical processing assembly, a reflection device (30), a light modulator (40) and a controller. The light source device (10) is configured to emit a plurality of light beams; the optical processing assembly is configured to perform a light path adjustment on each light beam from the light source device (10) in such a manner that the light beam irradiates on the reflection device (30) at a preset light-cone angle; the reflection device (30) is configured to reflect the light beams from the optical processing assembly to the light modulator (40); the controller is connected to the light source device (10) and the light modulator (40), and is configured to control a light emission state of the light source device (10); and the light modulator (40) is configured to modulate the light beams through respective controllable units, so as to emit desired display light.