Display Screen Positioning in Optical Modules
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Solution Overview
Problem
In consumer electronic products like AR, VR, and mobile phone micro-projection, ensuring precise alignment between the display screen and the optical lens is crucial for clear image quality, but current methods fail to consistently achieve this, leading to degraded image quality and user experience due to positional deviations.
Innovation Solution
A positioning method for a display screen in an optical module involves coaxially arranging light paths, calculating slope, distance, and plane position deviations using an image receiving device, and adjusting the display screen's position through six-axis adjustment mechanisms to achieve precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display screen position is not precisely positioned relative to the optical lens, then the alignment accuracy deteriorates, but the image quality becomes unclear and asymmetrical
Solution Approach 1:
The patent replaces traditional mechanical positioning methods with an optical-based positioning system. An image receiving device captures the virtual image formed by the optical lens, and a processing device calculates positional deviations based on image analysis. This optical-mechanical substitution enables non-contact, high-precision measurement of the display screen's position relative to the optical lens, achieving alignment accuracy that mechanical methods cannot provide.
Solution Approach 2:
The patent introduces an intermediary positioning system consisting of an image receiving device and processing device. This intermediary system mediates between the display screen and optical lens by capturing the virtual image, calculating deviations, and providing positioning information. The intermediary enables indirect measurement and precise control of the relative position without direct mechanical contact, resolving the contradiction between positioning precision and image quality.
2Measurement precision
If traditional positioning methods are used, then the positioning process becomes complex and time-consuming, but the alignment precision cannot be ensured
Solution Approach 1:
The patent implements a self-service positioning system where the display screen's own virtual image serves as the measurement target. The image receiving device captures the virtual image generated by the optical lens from the display screen, and the processing device automatically calculates positional deviations through image processing algorithms. This self-service approach eliminates the need for external measurement tools and complex positioning procedures, achieving high precision with simplified operations.
Solution Approach 2:
The patent uses the virtual image as a copy or representation of the display screen's position information. Instead of directly measuring the physical display screen, the system captures and analyzes its optical copy (virtual image) through the image receiving device. This copying method simplifies the measurement process while maintaining high positioning precision, as the virtual image contains all necessary positional information in an easily analyzable format.
3Manufacturing precision
If manual alignment adjustment is performed, then the operation time increases, but the alignment accuracy remains insufficient
Solution Approach 1:
The patent implements a closed-loop feedback positioning system. The image receiving device continuously monitors the virtual image position, the processing device calculates deviations in real-time, and the feedback information guides automatic adjustment mechanisms. This feedback loop enables rapid, precise alignment adjustments without manual intervention, simultaneously improving alignment accuracy and reducing adjustment time through automated closed-loop control.
Solution Approach 2:
The patent performs preliminary positioning actions by pre-calculating the optimal position based on virtual image analysis. The system captures the virtual image, calculates the required adjustment amount and direction in advance, and then executes the positioning action. This preliminary calculation approach eliminates trial-and-error manual adjustments, significantly reducing adjustment time while ensuring high alignment accuracy through pre-planned precise positioning.
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
This method detects and corrects positional deviations of the display screen relative to the optical lens, improving image quality and production yield by ensuring accurate alignment, thereby enhancing user experience and assembly efficiency.
Implementation Method 1
a light path formed by a light ray from the image passes through the optical lens
Data Source
AI summary
Provided are a positioning method and apparatus for a display screen in an optical module. The positioning method for the display screen in the optical module comprises the following steps: arranging light paths of an optical lens and image receiving device of a product coaxially; providing the display screen, and activating the display screen, wherein the display screen displays an image, and a light path formed by a light ray from the image passes through the optical lens; the image receiving device receives the light path passing through the optical lens in real time to obtain a virtual image; calculating a slope deviation of the display screen; calculating a distance deviation from the display screen to the optical lens; calculating a plane position deviation of the display screen; and calibrating a relative position of the display screen according to a calculation result.