Projector Light Correction for Screen Refraction Distortion
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Solution Overview
Problem
In multi-projector systems, the refractive properties of light transmission members in screen support structures cause distortion of projection images due to deviation of incident light, leading to image quality issues at the boundaries of projected images.
Innovation Solution
A projector system with a projection section that includes a light source and scanning mechanism, controlled by a drive section to adjust light emission and scanning angles, and a correction section that calibrates the orientation of projection light based on the refractive index of the light transmission member to correct the incident position of light on the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light transmission members are used in screen support structures to prevent shading, then boundaries of projection images are not disturbed, but projection images become distorted due to refraction of light
Solution Approach 1:
The patent applies preliminary action by pre-calculating and pre-adjusting the scanning angles of the scanning section before light passes through the light transmission member. The correction section modifies the scanning angles in advance based on the refractive index, so that when light refracts through the support member, the incident positions on the screen remain accurate and image distortion is prevented.
2Stability of the object's composition
If support members are located at the boundaries of projection regions to prevent screen slackening, then screen support is improved, but light and shadow boundaries of projection images are disturbed
Solution Approach 1:
The patent uses light transmission members as intermediaries in the support structure. These members allow light to pass through while still providing structural support at the boundaries. Combined with the scanning angle correction, the light transmission members serve as mediators that maintain both screen stability and image quality at boundaries.
3Productivity
If scanning section projects light to rear plane side of screen, then image projection is achieved, but light incident position deviates due to refraction at light transmission member
Solution Approach 1:
The correction section functions as a feedback mechanism that calculates the refractive index of the light transmission member and uses this information to adjust the scanning angles. This closed-loop correction ensures that the light incident positions on the screen remain accurate despite the refraction occurring in the support structure.
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 solution effectively alleviates distortion of projection images by accurately positioning light at the boundaries, maintaining image quality and brightness, even with screen support members present.
Implementation Method 1
since light that enters the light transmission member of the support member is refracted, the incident light deviates from the incident position
Data Source
AI summary
A projector that can solve a problem in which a projection image is disturbed due to deviation of incident positions of projection light to a screen is provided. Projection section 11 includes LD light emission section 111 and scanning section 112 that scans light emitted by LD light emission section 111 and projects the scanned light to the rear plane side of the screen. Control section 12 controls an amount of light emission of the light and a scanning angle of scanning section 112 based on an image signal so as to cause projection section 11 to project an image corresponding to the image signal to the screen. Control section 12 corrects an orientation of projection light corresponding to each pixel of the image projected from projection section 11 based on a refractive index of the light transmission member and a scanning angle of scanning section 112 so as to correct an incident position of the projection light on the screen.