External Processing Device Keystone Correction System
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Solution Overview
Problem
Current projector keystone correction methods, relying on image processing chips, often result in insufficient performance or picture delay, especially when higher resolution and refresh rates are required, leading to distorted projections.
Innovation Solution
A projection picture correction system where a processing device external to the projector receives keystone correction parameters, performs the necessary corrections, and transmits the corrected images back to the projector, offloading the correction process from the projector's internal capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image processing chip inside the projector performs keystone correction, then the projector can correct trapezoidal pictures to rectangular pictures, but the processing performance is insufficient and picture delay occurs when higher resolution and refresh rates are required
Solution Approach 1:
The patent extracts the keystone correction function from the projector's internal image processing chip and relocates it to an external processing device (such as a host computer or graphics processing unit). This separation allows the external device, which has superior processing capabilities, to handle the computationally intensive keystone correction tasks, thereby resolving the contradiction between maintaining correction capability and improving processing speed for high-resolution images.
2Reliability
If the projector uses manual OSD adjustment for keystone correction, then the projector can correct picture distortion, but the operation complexity increases and automatic correction is not achieved
Solution Approach 1:
The patent implements self-service by enabling the external processing device to automatically perform keystone correction based on parameters received from the projector (such as inclination angle data from sensors). The system autonomously calculates and applies correction without requiring manual user intervention through OSD menus, thereby maintaining high correction accuracy while significantly improving ease of operation.
3Speed
If the projector performs keystone correction internally, then the correction can be applied in real-time, but the projector's image processing resources are overloaded and picture quality deteriorates
Solution Approach 1:
The patent introduces an external processing device as an intermediary between the image source and the projector. This intermediary handles the computationally demanding keystone correction tasks, allowing the projector to focus on its core function of image projection. The external device processes corrections with sufficient computational resources, preventing picture quality deterioration while maintaining real-time correction capability through efficient data transmission protocols.
Data Source
AI summary
A projection picture correction system, and an electronic equipment and a projector thereof are provided. The projection picture correction system includes a projector and a processing device. The projector is for providing keystone correction parameters. The processing device connects to the projector through a data transfer interface to receive the keystone correction parameters from the projector, performs a keystone correction on at least one picture according to the keystone correction parameters and generates a corrected picture, and connects to the projector through an image transmission interface to transmit the corrected picture to the projector for projection.