Projection Device Automatic Image Alignment Using Recognition Devices

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Solution Overview

Problem

Existing projection devices face challenges in accurately adjusting images at ultra-short focus distances, leading to deformation and requiring lengthy manual adjustments to overlap with projection screens, especially in dynamic application scenarios like home entertainment.

Innovation Solution

A system comprising a projection device and recognition devices that transmit and receive positional information to automatically adjust the projection range, dividing the projection area into zones and using infrared position identification codes or image recognition to ensure precise alignment with the projection screen.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual adjustment is used to align the projected image with the projection screen, then the projection device can be adjusted, but it takes a long period of time and the adjustment accuracy is insufficient

Engineering Contradiction:

Improveadjustment accuracyVSAvoidadjustment time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces the manual mechanical adjustment system with an automatic image adjustment system that uses image recognition technology. The projection device automatically captures images of the projection screen, processes these images to determine alignment parameters, and adjusts the projection image accordingly, eliminating the need for manual mechanical adjustment and achieving both high accuracy and speed.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The projection device performs self-adjustment by automatically capturing images, processing them to determine alignment parameters, and modifying its projection output without external intervention. The system uses its own imaging capability to detect misalignment and automatically corrects it through coordinate transformation and image processing algorithms.

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If the projection device is moved frequently for home entertainment applications, then the device is more versatile, but the image becomes deformed and requires frequent debugging

Engineering Contradiction:

ImprovemobilityVSAvoidimage alignment stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the projection device continuously captures images of the projection screen, processes these images to detect alignment status, and automatically adjusts the projection parameters in response. This closed-loop feedback system ensures that the projection image remains properly aligned regardless of device movement or position changes.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system transitions from static manual adjustment to dynamic automatic adjustment. The projection device can now adapt in real-time to changing conditions such as device movement, screen position changes, or environmental factors by continuously monitoring image alignment and automatically adjusting parameters through coordinate transformation and image processing.

Inventive Principle:

Principle #15Dynamics

3Area of stationary object

If ultra-short focus projection is used to project large images over short distances, then the device can be applied to home entertainment, but the image becomes deformed due to projection at ultra-short focus

Engineering Contradiction:

Improveprojection screen sizeVSAvoidimage deformation

Core Design Contradiction:

Area of stationary objectVSShape

Solution Approach 1:

The patent changes the projection parameters dynamically based on the detected image alignment and deformation. By capturing images of the projection screen and analyzing the coordinates of reference points, the system calculates transformation parameters that correct for ultra-short focus distortion, then applies these parameters to adjust the projection image shape and orientation accordingly.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system accounts for and corrects the asymmetric distortion characteristic of ultra-short focus projection. By detecting the specific deformation pattern through image processing and applying asymmetric coordinate transformation, the system compensates for the non-uniform distortion caused by projecting at ultra-short distances, restoring the proper geometric relationships in the projected image.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS10257481B2Method and system for adjusting a projected image, and projection device

Publication Date: 2019.04.09 HISENSE USA CORP

AI summary

The disclosure relates to the field of electronic devices and particularly to a method and device for adjusting a projected image so as to adjust the problem of time-consuming and inaccurate manual adjustment of the image in the existing method for adjusting a projected image. The method according to an embodiment of the disclosure includes: transmitting, by a projection device, to each zone in a projection range, positional information corresponding to the zone; receiving, by the projection device, position identifiers, transmitted by recognition devices located in space round a projection screen, the position identifiers determined by the recognition devices according to the positional information transmitted by the projection device; and adjusting, by the projection device, the projection range according to the position identifiers transmitted by the recognition devices.