Projection System Sensor Dot Distance Measurement
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Solution Overview
Problem
Conventional projectors require users to manually measure the size of the image on a projection surface, which is inconvenient and prone to errors, as the image size changes with the distance from the projector, and existing solutions do not provide a straightforward method to display the image size accurately.
Innovation Solution
A projection system that includes a processing device, sensor, and projection mechanism, which generates projection size information by calculating the distance between dots and the area of images on the projection surface using taken image information and displays numerical values representing these sizes on the surface, allowing users to easily determine and adjust the image size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the projector displays an image on the projection surface, then the image size changes with the distance from the projector, but it becomes inconvenient for users to determine the actual size of the displayed image
Solution Approach 1:
The patent introduces a sensor (camera) as an intermediary device to capture the projection image and calculate its real-world size. The sensor obtains position information of multiple dots in the projection image, and the processing device uses this information to compute the actual dimensions, thereby providing size information without requiring manual measurement by the user.
Solution Approach 2:
The patent replaces the manual mechanical measurement method with an automated optical-electrical system. Instead of using physical measuring tools, the system uses a sensor to capture the image, converts the optical information into electrical signals, and processes these signals to calculate the image size automatically, thus substituting mechanical measurement with an automated sensing and processing system.
2Measurement precision
If the projector displays an image on the projection surface, then the image size changes with the distance from the projector, but manual measurement is required which is time-consuming and prone to errors
Solution Approach 1:
The projection system performs self-measurement by using its own integrated sensor to capture and analyze the projection image. The processing device automatically calculates the image size based on the position information of dots in the captured image, eliminating the need for external manual measurement tools and operations, thus achieving both high precision and time efficiency.
Solution Approach 2:
The system implements a feedback mechanism where the sensor continuously monitors the projection image, and the processing device uses this feedback information to calculate and determine the current image size. This closed-loop approach ensures accurate real-time measurement without manual intervention, resolving the contradiction between measurement precision and time consumption.
Data Source
AI summary
A projection method includes generating projection size information including at least one of first size information representing a distance between two dots included in a first projection image displayed on a projection surface, and second size information representing an area of a first image included in the first projection image based on information output from a sensor, and displaying a second projection image including an image showing a numerical value represented by the projection size information on the projection surface.