OLED Panel Response Speed via Split-Frame Rendering
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Solution Overview
Problem
Organic light-emitting diode (OLED) panels in image display apparatuses experience a phenomenon where images leave trails when displaying moving images, due to slow response times, which affects image quality.
Innovation Solution
The implementation of a controller that manages OLED panels by displaying a portion of one frame image on one area and a portion of the previous frame image on another area, followed by a black image on all areas, during specific durations, to improve response speed. Additionally, applying a pulse voltage to the cathode of the organic light-emitting layer and using a first switching element connected between the cathode and ground for panel response time adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a hold-type OLED panel is used to maintain image quality, then image stability is improved, but response speed deteriorates causing trail artifacts in moving images
Solution Approach 1:
The display area is divided into multiple regions (first area and second area) that display different frame contents simultaneously. The first area displays the current frame while the second area displays the previous frame, allowing the panel to maintain image stability in the first area while preparing for faster transitions in the second area, thus resolving the contradiction between image stability and response speed.
Solution Approach 2:
The patent dynamically switches between different display modes (first display mode with split-frame rendering and second display mode with black screen) based on the detected movement amount. This dynamic adaptation allows the system to optimize between image stability and response speed depending on the specific display conditions, resolving the contradiction through context-dependent behavior.
2Speed
If frame rate is increased to improve response speed, then motion clarity is improved, but image quality deteriorates due to trail artifacts
Solution Approach 1:
The display area is segmented into multiple regions displaying different frame contents. By showing the current frame in the first area and the previous frame in the second area, the system can effectively increase the perceived frame rate and improve motion clarity while maintaining image quality, as the hold-type panel maintains stable image display in each region.
Solution Approach 2:
The system performs preliminary action by displaying the previous frame in the second area before the current frame is fully displayed in the first area. This preliminary display of the previous frame prepares the panel for faster transitions and improves response speed while maintaining image quality through the hold-type panel's stable display characteristics.
3Manufacturing precision
If black image is displayed to reduce trail artifacts, then image quality is improved, but display time is reduced affecting productivity
Solution Approach 1:
Instead of displaying a complete black image across the entire screen, the patent segments the display area and only shows black in the second area where the previous frame is displayed. This segmented approach reduces the total black display time and maintains productivity while still effectively reducing trail artifacts in the visible image areas.
Solution Approach 2:
The patent applies local quality by displaying black only in the second area where it is needed to reduce trail artifacts, while maintaining normal display in the first area. This localized black display approach reduces the overall impact on display time and productivity while still improving image quality where necessary.
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 approach enhances the response speed of OLED panels when displaying moving images, ensuring high image quality by reducing trail artifacts and adapting to varying movement levels within the image.
Implementation Method 1
a display including an organic light-emitting diode (OLED) panel
Implementation Method 2
the pixel includes an organic light-emitting layer
Data Source
AI summary
The present invention relates to an image display apparatus. The image display apparatus according to an embodiment of the present invention a display including an organic light-emitting diode (OLED) panel, and a controller to control the OLED panel, in which, in a case where an image to be displayed on the OLED panel is a moving image, during a first duration, the display displays a portion of a first frame image on a first area of the OLED panel and displays a portion of a second frame image before the first frame image on a second area other than the first area of the OLED panel, and in which, in the case where the image to be displayed on the organic light-emitting is the moving image, during a second duration after the first duration, the display displays a black image on all display areas of the OLED panel.