Retinal Projection Display Dual-Mirror Deflection
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Solution Overview
Problem
Existing retinal projection displays face limitations in expanding the viewing zone and maintaining high image resolution, with conventional methods often resulting in narrow viewing zones and decreased resolution with increased viewing angles.
Innovation Solution
An optical device comprising a light source, a scanning mirror, a deflection mirror, and a controller that controls the deflection directions of both mirrors to scan and deflect light, allowing for increased viewing zones and resolution by adjusting the light's deflection paths and positions on the retina.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional light scanning system is used to expand the viewing zone, then the viewing angle increases, but the image resolution decreases
Solution Approach 1:
The patent introduces a second deflection mirror that operates in a dimension independent of the primary scanning mirror. This allows the light beam to be deflected in two separate directional dimensions, enabling expansion of the viewing zone in one dimension without compromising the resolution maintained by the primary scanning system in its dedicated dimension.
Solution Approach 2:
The patent divides the light deflection function into two separate mirrors: a first deflection mirror for primary scanning and a second deflection mirror for additional directional control. This segmentation allows each mirror to specialize in maintaining resolution for its specific function while collectively expanding the overall viewing zone.
2Area of stationary object
If the viewing zone is expanded by increasing the deflection angle, then more area is covered, but the image resolution deteriorates
Solution Approach 1:
The second deflection mirror adds an independent dimensional degree of freedom to the light path control. This allows the system to expand the covered area by deflecting light in a direction perpendicular to the primary scanning plane, without increasing the deflection angle in the primary scanning dimension, thereby preserving image resolution.
Solution Approach 2:
The second deflection mirror acts as an intermediary element between the light source and the display surface. It modifies the light path direction without interfering with the primary scanning mirror's resolution-maintaining function, allowing area expansion while keeping the primary imaging path intact.
3Device complexity
If a single deflection mirror is used to control light direction, then the device is simple, but the viewing zone remains narrow
Solution Approach 1:
The patent segments the light deflection control into two independent mirror units, each responsible for a specific directional dimension. This segmentation enables the viewing zone to be expanded in multiple directions without requiring a single complex mirror, thus managing complexity through modular functional division.
Solution Approach 2:
Each deflection mirror serves multiple functions: the first mirror maintains primary scanning resolution while the second mirror expands the viewing zone. Together, they create a multi-functional optical system that achieves both resolution preservation and viewing zone expansion without requiring entirely separate systems.
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 effectively enlarges the viewing zone and maintains high image resolution across various angles, enabling clear image recognition without focusing constraints and reducing the device's size through MEMS mirror technology.
Implementation Method 1
a light scanner to deflect light emitted from the light source to scan an image formation object with the light through a light deflector
Implementation Method 2
the light deflector to deflect the light emitted from the light scanner to the image formation object
Data Source
AI summary
An optical device includes: a light source to emit light; a light scanner to deflect the light emitted from the light source to scan an image formation object with the light through a light deflector; the light deflector to deflect the light emitted from the light scanner to the image formation object; a reflector between the light scanner and the image formation object; and a controller to control the light deflector to deflect the light emitted from the light scanner in a deflection direction and the light scanner to deflect the light emitted from the light source in a deflection direction different from the deflection direction of the light deflector.