Laser Projection Display Color Alignment Compensation
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Solution Overview
Problem
Laser projection displays face issues with misalignment of colors, leading to degraded image resolution and quality, and increased power consumption due to compensating for lost light intensity, which existing technologies fail to address effectively and efficiently.
Innovation Solution
A laser projection display system that includes a light source unit, a light resolution unit, an optical scanner, a sensing unit, and an alignment compensation unit, which senses and compensates for color alignment variations by calculating location variations and adjusting the dichroic mirror's rotation to maintain optimal color alignment, thereby reducing power consumption and enhancing luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If laser light sources power is increased to compensate for lost light intensity caused by color misalignment, then image brightness is maintained, but luminous efficiency deteriorates
Solution Approach 1:
The patent implements an automatic feedback control system where a sensing unit detects the actual positions of color lights, an alignment calculator computes misalignment amounts, and a controller adjusts dichroic mirror rotation angles to compensate. This closed-loop feedback mechanism automatically corrects color alignment deviations without requiring increased power consumption, thereby maintaining image brightness while preserving luminous efficiency.
Solution Approach 2:
The system performs self-alignment by automatically detecting its own color misalignment state and correcting it through controller-adjusted dichroic mirror rotation. The laser projection display system serves itself by incorporating the sensing unit and alignment calculation functionality, eliminating the need for external manual adjustment or power compensation, thus avoiding luminous efficiency deterioration.
2Manufacturing precision
If manual alignment adjustment is performed to correct color misalignment, then image quality improves, but device complexity and operation difficulty increase
Solution Approach 1:
The system automatically performs color alignment correction through its built-in sensing unit and controller that adjusts dichroic mirror rotation angles based on detected misalignment. This self-service mechanism eliminates the need for manual intervention, thereby maintaining high color alignment precision while ensuring ease of operation.
Solution Approach 2:
The automatic feedback control system continuously monitors color light positions and adjusts dichroic mirror angles accordingly, replacing manual alignment adjustment with an automated process that achieves high precision without increasing operational complexity.
3Manufacturing precision
If automatic sensing and compensation system is implemented, then color alignment precision improves, but device complexity increases
Solution Approach 1:
The sensing unit serves multiple functions: it detects color light positions for alignment compensation, monitors laser beam characteristics, and provides feedback for power optimization. This multi-functionality reduces the need for separate dedicated components, thereby achieving high color alignment precision while minimizing the increase in device complexity.
Solution Approach 2:
The patent combines the sensing unit, alignment calculation functionality, and controller into an integrated automatic alignment system that works cooperatively with the existing laser light sources and dichroic mirrors. By merging these functions rather than adding completely separate systems, the patent achieves improved color alignment precision with minimal increase in overall device complexity.
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 system automatically compensates for color misalignment, improving image quality and resolution while reducing power consumption and enhancing luminous efficiency by ensuring precise alignment of red, green, and blue light beams, thus addressing the limitations of existing technologies.
Implementation Method 1
a sensing unit for sensing the resolved second light
Implementation Method 2
adjusting the dichroic mirror's rotation to maintain optimal color alignment
Data Source
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Figure 3A
AI summary
There is disclosed a laser projection display including a light source unit for emitting light laser light; a light resolution unit for resolving the laser light into a first light and a second light; an optical scanner for realizing an image by scanning the resolved first light to a screen; a sensing unit for sensing the resolved second light; and an alignment compensation unit for calculating location variation of the second light sensed by the sensing unit and compensating color alignment to correspond to the calculated location variation value, wherein a distance between a light emitting surface of the light resolution and a light incidence surface of the optical scanner is equal to a distance between a light emitting surface of the light resolution unit and a light incidence surface of the sensing unit.