POV Display Frame Synchronization to Prevent Image Tearing
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Solution Overview
Problem
POV display devices experience a tearing phenomenon due to differences between input and output image data, making it difficult to smoothly display images when observing multiple still images per second.
Innovation Solution
A POV display device with a fixed module, a rotatable module, light source panels, and a controller that divides video frames based on the number of panels and stores them in memory for synchronized input and output, preventing the tearing phenomenon by controlling the order of video data input and output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the light emitting module rotates at high speed to display moving images, then the display smoothness is improved, but a tearing phenomenon occurs due to differences between input and output image data
Solution Approach 1:
The controller stores video data in advance in a memory device before the light emitting module rotates to display it. By preparing the image data beforehand and storing it in memory, the system ensures that the correct frame data is available when needed during high-speed rotation, preventing the tearing phenomenon that occurs when input and output data are out of sync.
2Productivity
If multiple still images are displayed per second to create smooth moving images, then the image smoothness is improved, but the tearing phenomenon becomes more frequent
Solution Approach 1:
The controller synchronizes the input and output of video data by monitoring the rotation state of the light emitting module and adjusting the data transmission timing accordingly. This feedback mechanism ensures that image data is input to and output from the memory device at the correct moments, preventing tearing even when displaying multiple frames per second.
3Device complexity
If video data is continuously input and output without synchronization control, then the system simplicity is maintained, but the tearing phenomenon occurs
Solution Approach 1:
A memory device is introduced as an intermediary between the video data source and the light emitting module. This memory buffer decouples the data input and output processes, allowing them to be synchronized independently with the rotation cycle, thereby preventing tearing while maintaining relative system simplicity.
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
Prevents the tearing phenomenon, ensuring smoother image display by synchronizing input and output data, allowing the image to be converted only at the time of frame conversion, thereby improving the display quality.
Implementation Method 1
a POV (Persistence of Display) display device that may reproduce various characters and graphics as well as moving images using an afterimage effect of a human by rotating a light emitting module
Implementation Method 2
using light emitting diodes (LEDs), which are semiconductor light emitting elements
Data Source
AI summary
The present invention provides a persistence of vision (POV) display device using a light emitting element, the display device comprising: a fixed module including a motor; a rotating module located on the fixed module and rotated by the motor; at least one panel coupled to the rotating module; a plurality of light sources arranged on the panel and having a plurality of pixels; a light source module including a light emitting element array in which the plurality of light sources are arranged in a longitudinal direction; memory that stores video data received from an external source device; and a controller that controls the order of input of the video data and the order of output of the video data.