Display Panel and Light-Source Refresh Timing for Fewer Afterimages
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Solution Overview
Problem
Conventional liquid-crystal displays have a constant refresh rate, leading to afterimages and reduced image quality when displaying fast-changing and dynamic content.
Innovation Solution
An electronic device with a variable-refresh-rate technology, where both the display panel and the light source refresh at different rates, with the display panel switching between refresh rates such as 240 Hz, 120 Hz, and 80 Hz, and the light source adjusting brightness accordingly through a light source controller and light-emitting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant refresh rate is used in liquid-crystal displays, then the device structure is simple, but afterimages occur and image quality deteriorates when displaying fast-changing content
Solution Approach 1:
The patent applies dynamics by making the refresh rate variable rather than constant. The display panel and light source dynamically adjust their refresh rates based on the characteristics of the displayed content, switching between different refresh rate levels (e.g., 240Hz, 120Hz, 80Hz) to optimize image quality for fast-changing scenes while avoiding afterimages.
Solution Approach 2:
The patent changes the refresh rate parameter from a fixed value to a variable that can be adjusted according to content requirements. The controller modifies the refresh rate parameters of both the display panel and light source independently, allowing optimization of image fluency and reduction of afterimages by adapting to different scene complexities.
2Reliability
If the display panel and light source refresh at the same time, then the control system is simple, but image fluency is reduced and afterimages occur during fast-changing content
Solution Approach 1:
The patent applies preliminary action by having the light source refresh its brightness before the display panel updates the image content. This timing offset ensures that when the display panel transitions between frames, the backlight is already at the appropriate brightness level, preventing visible flicker and improving image fluency during fast-changing scenes.
Solution Approach 2:
The patent implements dynamic timing control where the refresh cycles of the display panel and light source are independently adjusted. The controller dynamically sets different refresh rates and timing offsets between the display panel and light source based on content characteristics, optimizing image fluency for different scene types.
Data Source
AI summary
An electronic device is provided and includes a display panel, a light source, and a controller. The light source is disposed corresponding to the display panel. The controller is electrically connected to the display panel and the light source. The light source is configured to provide a light with a brightness. The light source refreshes the brightness according to a signal generated by the controller. The light source begins refreshing the brightness at a first time point. The display panel is configured to display a displayed content. The display panel begins refreshing the displayed content at a second time point. The first time point is different from the second time point.