LCOS Projection Prism Layout Without Polarizing Beam Splitters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projection display apparatuses have a complex structure due to the use of multiple polarizing beam splitters and a light-combining prism, leading to a large number of component parts.
Innovation Solution
A simplified projection display apparatus design that uses a light-combining prism and LCOS modulators, eliminating the need for polarizing beam splitters, and incorporates a light source with red, green, and blue laser light sources to generate and combine monochromatic light for projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple polarizing beam splitters and a light-combining prism are used to combine beams, then beam combining function is achieved, but the quantity of component parts increases and structure becomes complex
Solution Approach 1:
The patent merges the functions of multiple polarizing beam splitters and a light-combining prism into a single integrated light-combining prism with four rectangular prisms. The four intersection planes within this single prism perform the beam combining function that previously required multiple separate components, thereby reducing component quantity and structural complexity while maintaining the same optical function.
2Ease of manufacture
If multiple polarizing beam splitters and a light-combining prism are used to combine beams, then beam combining function is achieved, but manufacturing costs increase
Solution Approach 1:
By integrating multiple beam combining functions into a single light-combining prism with four rectangular prisms, the patent reduces the total number of components that need to be manufactured and assembled. This integration lowers manufacturing costs by reducing component production expenses and assembly operations, while the simplified structure also reduces quality control complexity.
3Volume of moving object
If multiple polarizing beam splitters and a light-combining prism are used to combine beams, then beam combining function is achieved, but the forming size increases
Solution Approach 1:
The patent consolidates multiple beam combining components into a single integrated light-combining prism, significantly reducing the overall volume occupied by the optical system. The four rectangular prisms are arranged to form a compact structure that performs the same beam combining function as multiple separate components would, thereby reducing the forming size and improving space utilization.
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
Reduces the number of component parts and simplifies the structure, thereby decreasing manufacturing costs and size while maintaining effective projection performance.
Implementation Method 1
beam splitting is implemented by using two intersection planes in the four intersection planes, that is, the light is decomposed into red light, green light, and blue light
Implementation Method 2
The modulation component includes a light-combining prism and an LCOS modulator. The LCOS modulator is configured to generate modulated light and unmodulated light
Implementation Method 3
a modulation module based on a liquid crystal on silicon or reflective liquid crystal light valve (liquid crystal on silicon, LCOS) modulator generally uses a plurality of polarizing beam splitters (polarizing beam splitter, PBS)
Data Source
AI summary
The optical machine module includes a light emitting module and a modulation module. The light emitting module includes a light source configured to emit linearly polarized light. The modulation module includes a modulation component. The modulation component includes a light-combining prism and a liquid crystal on silicon (LCOS) modulator. The light-combining prism includes four rectangular prisms. The light-combining prism has four sides and four intersection planes formed by the four rectangular prisms. The LCOS modulator includes a first LCOS modulator, a second LCOS modulator, and a third LCOS modulator. The first LCOS modulator, the second LCOS modulator, and the third LCOS modulator are respectively disposed on light emitting sides of three different sides. At least two of the four intersection planes are configured to split light. At least two of the four intersection planes are configured to combine light.