Projection Lens Control for Bent Surface Alignment
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Solution Overview
Problem
Projectors face challenges in accurately projecting images onto surfaces with bends, leading to distortion and inconvenience due to limited space and difficulty in fine adjustments when the projection surface is divided into multiple areas.
Innovation Solution
An electronic apparatus equipped with sensors and a processor that acquires distance and projection surface information to adjust the projection lens movement, allowing for image size correction and optimal projection area selection based on surface geometry, ensuring proper image output without distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the image is projected over multiple areas (front surface and side surface), then the projection area is increased, but image distortion occurs
Solution Approach 1:
The projection surface is divided into multiple areas (front surface and side surface), and the image is separately projected to each area. The processor identifies the bend position and divides the projection surface into first and second areas, then projects appropriate image portions to each area, avoiding distortion that would occur if the entire image were projected across the bend.
Solution Approach 2:
The projection lens is made movable to dynamically adjust the projection position and size. Based on distance information and projection surface information acquired by sensors, the processor calculates movement information and controls the projection lens to move, enabling the image to be accurately projected to the appropriate area while maintaining image quality and avoiding distortion.
2Manufacturing precision
If only existing correction for reducing image size is performed, then distortion is reduced, but the image becomes excessively small
Solution Approach 1:
Instead of simply reducing image size through existing correction methods, the system changes multiple parameters including projection lens position, projection distance, and image scaling ratio. By acquiring distance information from sensors and calculating appropriate movement information, the processor adjusts these parameters to maintain image size while correcting distortion through accurate positioning on the projection surface.
3Ease of operation
If a user directly and manually moves the projector, then position adjustment is possible, but fine adjustment is difficult and user convenience is reduced
Solution Approach 1:
The projector performs self-adjustment through automatic control. Sensors acquire distance information and projection surface information, the processor calculates the required movement information, and the projection lens automatically moves to the correct position. This eliminates the need for manual user adjustment, providing both convenience and precise positioning that would be difficult to achieve manually.
Solution Approach 2:
The system uses sensor feedback to continuously monitor distance and projection surface conditions. Based on this feedback information, the processor calculates appropriate movement commands and adjusts the projection lens position automatically, enabling precise fine adjustments that respond to actual projection conditions rather than relying on manual user estimation.
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
The solution enables precise image projection onto surfaces with bends by dynamically adjusting image size and position, maintaining aspect ratio, and guiding user movement to achieve optimal screen alignment, thus overcoming distortion and convenience issues.
Implementation Method 1
a distance sensor, the movement information may include at least one of a movement direction or a movement distance
Implementation Method 2
a projection part including a projection lens configured to output the image to a projection surface
Data Source
AI summary
An electronic apparatus is provided. The electronic apparatus includes: a memory configured to store an image; a sensor part including at least one sensor; a projection part including a projection lens configured to output the image to a projection surface; and a processor configured to acquire distance information from the electronic apparatus to the projection surface through the sensor part, acquire output size information of the image based on the acquired distance information, acquire projection surface information corresponding to a bend of the projection surface through the sensor part, acquire movement information of the projection lens based on the output size information of the image and the projection surface information, and control the projection part to output the image based on the movement information.