Projection Device Oscillating Optical Module Resolution
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Solution Overview
Problem
Existing projection devices face challenges of high cost and reduced optical quality due to the use of high-resolution light valves and additional resolution enhancement elements, which also lead to increased size and interference with light valves or lenses.
Innovation Solution
A projection device configuration that includes an illumination system, a light valve, a light guide element, and an optical module with a first frame body and driving elements positioned away from the intersection of the projection lens and light valve, allowing for oscillation and enhanced image resolution without interfering with the lens or valve, thus reducing size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional resolution enhancement elements with optical oscillation technology are configured, then image resolution is enhanced, but device size increases and optical quality is reduced due to interference with light valves or lenses
Solution Approach 1:
The patent positions the oscillating optical element in a specific spatial relationship where its oscillation occurs in a dimension that does not intersect with the optical paths of the projection lens or light valve. The first virtual plane of the projection lens intersects with the second virtual plane of the light valve to form a virtual line segment, and the oscillation is confined to a region shorter than this intersection distance, effectively using dimensional separation to avoid interference while maintaining resolution enhancement.
Solution Approach 2:
The patent applies local quality by creating an asymmetric configuration where only specific portions of the optical system are oscillating while others remain stationary. The first frame body with the optical element oscillates locally to enhance resolution, while the projection lens and light valve remain fixed, avoiding interference. This localized oscillation approach maintains optical quality while achieving resolution enhancement.
2Measurement precision
If high-resolution light valves are used, then image resolution is improved, but device cost increases significantly
Solution Approach 1:
The patent employs dynamic oscillation of the optical element to achieve resolution enhancement instead of using a static high-resolution light valve. By oscillating the optical element back and forth during operation, the system effectively increases the resolution of a lower-cost light valve, transforming a static limitation into a dynamic solution that reduces manufacturing costs while maintaining high image resolution.
Solution Approach 2:
The patent changes the operational parameters of the optical system by introducing oscillation motion. The optical element oscillates within a controlled range (distance shorter than the virtual line segment formed by lens and valve intersections), effectively changing the spatial parameters of light transmission. This parameter change allows a lower-resolution light valve to achieve higher effective resolution, reducing the need for expensive high-resolution light valves.
3Measurement precision
If resolution enhancement elements are added, then image resolution is enhanced, but optical quality is reduced due to interference with projection lens or light valve
Solution Approach 1:
The patent extracts the oscillation function from the main optical path that contains the projection lens and light valve. By placing the oscillating optical element in a separate oscillating frame that operates in a different spatial region (with distance shorter than the virtual line segment), the harmful interference is extracted and isolated from the critical optical components, allowing resolution enhancement without compromising optical quality.
Solution Approach 2:
The patent segments the optical system into distinct functional modules: a fixed portion containing the projection lens and light valve, and an oscillating portion containing the optical element. This segmentation allows the oscillating element to enhance resolution independently while the fixed optical components maintain optical quality without interference, as each segment operates in its designated spatial and functional zone.
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 enhances image resolution, maintains good optical quality, and reduces the size and cost of the projection device compared to traditional configurations, while preventing interference with the projection lens or light valve.
Implementation Method 1
the at least one first driving element is configured on at least one of the other three second sides of the first frame body and configured to drive the first frame body to oscillate back and forth. When oscillating, the optical element oscillates with the first frame body to enable the transmission path of the image beam to produce a displacement in a first direction.
Implementation Method 2
The projection lens is configured on the transmission path of the image beam and configured to convert the image beam into a projection beam
Implementation Method 3
The light valve is configured on the transmission path of the illumination beam and configured to convert the illumination beam into an image beam
Data Source
AI summary
The invention provides a projection device, comprising an illumination system, a light valve, a light guide element, an optical module and a projection lens. The optical module comprises a fixed portion, a first frame body, at least one first driving element and an optical element. The first frame body is pivoted to the fixed portion and comprises a first side and other three second sides. The first driving element is configured on at least one of the other three second sides and configured to drive the first frame body to oscillate back and forth. A first virtual plane of the projection lens intersects with a second virtual plane of the light valve to form a virtual line segment. The distance between the first side and the virtual line segment is shorter than the distance between the other three second sides and the virtual line segment.