Projector Cradle and Video Converter for Trapezoidal Distortion Correction
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Solution Overview
Problem
Existing projector systems face increased load when correcting trapezoidal distortion in real-time during moving picture projection, especially for projectors without advanced picture processing functions.
Innovation Solution
A projection system comprising a video image converter that generates and stores attitude data based on motion data, corrects moving picture data offline, and a cradle that adjusts the projector's attitude accordingly, allowing for pre-projection data generation and correction to reduce playback load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If trapezoidal distortion is corrected in real-time during moving picture projection, then projection quality is improved, but the load in playing back the moving picture is increased
Solution Approach 1:
The patent applies preliminary action by generating and storing attitude data before moving picture projection. The video image converter creates attitude data based on motion data and stores it in advance, so that during playback the projector only needs to retrieve and apply the pre-generated attitude data without performing complex real-time calculations, thus reducing playback load while maintaining projection quality
Solution Approach 2:
The patent introduces an intermediary element - the attitude data - that mediates between the motion data and the projection process. Instead of directly processing motion data in real-time during projection, the system uses pre-generated attitude data as an intermediary that contains the necessary correction information, simplifying the real-time playback process
2Manufacturing precision
If a projector with advanced picture processing function is provided to correct distortion in real-time, then projection quality is improved, but device complexity is increased
Solution Approach 1:
The patent extracts the complex picture processing function from the projector and places it in a separate video image converter. The converter generates attitude data based on motion data and provides it to the projector, which only needs to play back pre-corrected images. This separation allows standard projectors without advanced processing capabilities to achieve distortion correction
Solution Approach 2:
The patent creates a copy of the correction process by generating attitude data that represents the necessary distortion corrections. Instead of requiring the projector to perform complex real-time corrections, the system creates pre-calculated attitude data that serves as a simplified copy of the correction information, which the projector can apply directly during playback
Data Source
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AI summary
[Object] To suppress the load in playing back a moving picture in a projector having no advanced picture processing function. [Solution] A video image converter generates attitude data of a projector on a basis of motion data in projecting moving picture data, store the attitude data in a storage unit, correct the moving picture data in accordance with the attitude data, and store the corrected moving picture data in the storage unit. The projector plays back the corrected moving picture data stored in the storage unit and project the corrected moving picture data onto a projection plane. A cradle supports the projector and change an attitude of the projector in accordance with the attitude data stored in the storage unit.