Asynchronous Image Display Device with Interpolation Unit
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Solution Overview
Problem
Existing image display devices face challenges in speeding up image processing and smoothly displaying images, particularly in applications like simulators where rapid changes in image viewpoints are required, leading to delays and visual artifacts like boundary lines between frame images.
Innovation Solution
The image display device incorporates an image input unit, a memory, a writing unit that writes image signals at a first frequency, a reading unit that reads at a higher second frequency, and an image interpolation unit to asynchronously read and interpolate images, reducing delays and visual artifacts by reading images 32 times faster than they are written, effectively minimizing the visibility of boundary lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If image reading frequency is increased to reduce display delay and improve smoothness, then image processing speed and display smoothness are improved, but device complexity increases due to asynchronous reading and interpolation requirements
Solution Approach 1:
The patent applies preliminary action by pre-writing complete frame images into the memory buffer at the source frequency before they are needed for high-speed reading. This allows the reading unit to asynchronously read at higher frequencies without waiting for writing completion, reducing display delay while managing complexity through advance preparation of image data
Solution Approach 2:
The patent uses an interpolation unit as an intermediary component that processes the relationship between the writing unit and reading unit. This intermediary performs necessary image interpolation when reading frequency exceeds writing frequency, enabling smooth high-speed display while decoupling the writing and reading operations to manage system complexity
2Loss of time
If image reading frequency is increased to reduce delay between controller operations and image updates, then responsiveness is improved, but visual artifacts like boundary lines may appear if interpolation is insufficient
Solution Approach 1:
The patent ensures continuity of useful action by maintaining continuous writing of frame images into the memory buffer and continuous asynchronous reading at higher frequencies. The interpolation unit continuously processes intermediate frames to ensure smooth transitions, eliminating gaps that would cause visual artifacts while minimizing delay between controller operations and image updates
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the reading frequency parameter to be higher than the writing frequency, and using the interpolation unit to adjust image parameters (such as frame timing and positioning) to compensate for the frequency difference. This allows responsive display update while preventing visual artifacts through parameter optimization
Data Source
AI summary
An image display device includes an image input unit into which an image signal from an image signal source is input; a memory; a writing unit that writes at a first frequency an image signal input into the image input unit into the memory; a reading unit that reads at a second frequency higher than the first frequency an image signal written in the memory; an image output unit that outputs an image signal read by the reading unit to a display unit; and an image interpolation unit that interpolates an image to be output to the display unit.