Image Projection Apparatus 3D Brightness Resolution
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Solution Overview
Problem
Current 3D image projection methods either sacrifice brightness or resolution, require complex adjustments and multiple projectors, or necessitate lens replacement for 2D and 3D image projection, leading to increased costs and operational challenges.
Innovation Solution
An image projection apparatus utilizing one or more light sources emitting primary colors, reflection-type light valve groups, and a prism-type beam splitter to synthesize image information on a single optical axis, allowing for simultaneous 2D and 3D image projection without sacrificing brightness or resolution, and enabling easy switching between modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time division method is used to project left and right images, then 3D image projection is achieved, but brightness is reduced to half or less
Solution Approach 1:
The patent applies periodic action by sequentially switching between left-eye and right-eye image projection in time division manner, with each eye receiving light during its designated time slot. This periodic switching enables 3D image projection while maintaining the ability to control brightness through the synchronization of light source activation with each time slot
Solution Approach 2:
The patent changes the operational parameters by controlling the light source to emit light during both left-eye and right-eye time slots, rather than alternating light source activation. This parameter change in light source operation mode allows both eyes to receive sufficient light intensity, resolving the brightness reduction issue while maintaining 3D projection capability
2Reliability
If two projectors are used for left and right images, then 3D image projection is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the functions of two separate projectors into a single projector by implementing a light valve system with distinct left-eye and right-eye image display regions. This consolidation eliminates the need for multiple projectors while maintaining 3D projection capability, thereby reducing device complexity and eliminating the need for complex alignment adjustments
Solution Approach 2:
The single projector is designed with multi-functionality to handle both left-eye and right-eye image projection through a unified optical path. The light valve system can simultaneously or sequentially display images for both eyes, making the single projector universal for 3D projection tasks that previously required two dedicated projectors
3Reliability
If image display part is divided for left and right eyes, then 3D image projection is achieved, but resolution and brightness are reduced
Solution Approach 1:
The patent transitions from spatial division to temporal dimension by using time division multiplexing for left and right eye images. The light valve displays left-eye and right-eye images sequentially in different time slots rather than dividing the display area spatially, allowing the full resolution of the light valve to be utilized for each eye's image while achieving 3D projection
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 apparatus maintains brightness and resolution for 3D images, reduces installation and adjustment costs, and eliminates the need for lens replacement, providing a maintenance-free solution for switching between 2D and 3D projections.
Implementation Method 1
a first reflection-type light valve group configured to reflect incident light from the illumination optical systems based on first image information; a second reflection-type light valve group configured to reflect incident light from the illumination optical systems based on second image information; and a prism-type beam splitter configured to synthesize on one optical axis light reflected by the first reflection-type light valve group
Implementation Method 2
a prism-type beam splitter configured to synthesize on one optical axis light reflected by the first reflection-type light valve group and light reflected by the second reflection-type light valve group
Implementation Method 3
one or more light sources configured to emit light including one or more of three primary colors of light; one or more illumination optical systems configured to illuminate light from the light sources
Data Source
AI summary
Provided is an image projection apparatus including: one or more light sources; one or more illumination optical systems; a first reflection-type light valve group including three light valves and being configured to modulate incident light based on first image information; a second reflection-type light valve group including three light valves and being configured to modulate incident light based on second image information; a first prism-type photosynthesizing member having a function of synthesizing, on one optical axis, light that is reflected by the first reflection-type light valve group; a second prism-type photosynthesizing member having a function of synthesizing, on one optical axis, light that is reflected by the second reflection-type light valve group; and a prism-type beam splitter configured to synthesize, on one optical axis, light that has been reflected by the first reflection-type light valve group and light that has been reflected by the second reflection-type light valve group.