Projection System Sharing Image Between Projector and Display
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projection systems cannot share the state of an image with handwriting or drawings between multiple devices, leading to difficulties in synchronizing and displaying superimposed images accurately across different devices.
Innovation Solution
A projection system comprising a projection device and a display device, where the projection device captures and transmits images of a projection target, and the display device generates and transmits drawing images based on user input, allowing for synchronized display and projection of images across multiple devices through a communication network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a projection device displays an image with handwriting in a superimposed manner on a screen, then the image and handwriting can be recorded and played back together, but the state of superimposed images cannot be shared between multiple devices
Solution Approach 1:
The projection device captures the projected image using an image capturing unit (camera) and transmits the captured image data to the display device. This creates a visual copy of the projection state that can be displayed on another device, enabling sharing of the superimposed image state without requiring complex direct state synchronization between devices
Solution Approach 2:
The system uses captured image data as an intermediary to transfer the projection state between devices. Instead of directly sharing the complex projection state including overlay information, the system transmits visual snapshots that represent the projection state, simplifying the sharing mechanism while maintaining the essential information
2Adaptability or versatility
If multiple devices share projected images and drawing operations, then collaboration is enhanced, but display quality reduction occurs due to image overlap
Solution Approach 1:
The projection device captures the actual projected image and transmits it to the display device, creating a feedback loop that allows the display device to visualize the exact projection state. This enables synchronization of drawing operations across devices while maintaining display quality, as each device can adjust its display based on the captured image feedback from the projection device
Solution Approach 2:
The system separates the projection function from the display function across different devices. The projection device handles image projection while the display device handles high-quality visual display and drawing input. This dimensional separation allows multiple devices to collaborate without compromising display quality, as each device operates in its optimal dimension
3Ease of operation
If drawing operations are performed on projected images, then interactive annotation is enabled, but synchronization and accuracy of drawing operations across multiple devices becomes difficult
Solution Approach 1:
The system captures the projection state including any drawing operations and transmits this visual copy to the display device. This allows drawing operations to be performed interactively on the projected image while maintaining position and size accuracy, as the display device can reference the captured image to ensure precise reproduction of drawing elements across multiple devices
Solution Approach 2:
The projection device captures the projection state before transmitting it to the display device. This preliminary capture action establishes a reference state that ensures subsequent drawing operations maintain accurate positioning and sizing across devices, preventing synchronization issues by pre-defining the coordinate system and scale
Data Source
AI summary
With a projection device, a projection system including the projection device and a display device receives an image from the display device, projects the received image onto a projection target, captures a range including the projection target, and transmits the captured image to the display device. With the display device, the projection system receives the captured image from the projection device, displays the received captured image on the display, generates a drawing image based on a drawing operation, and transmits the generated drawing image to the projection device.