Variable Frame Display Backlight Strobe Flat Light Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices experience tearing and flicker issues when the frame rates between the host and the display device mismatch, leading to suboptimal image quality due to variable frame rates and irregular strobe light intervals.
Innovation Solution
A display device design that includes a display panel and a backlight unit, where the backlight unit provides strobe light during active sections and flat light during blank sections of variable frames, controlled by a processing unit and backlight controller to maintain consistent brightness and prevent flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the host provides data at a variable frame rate to match the display device's frame rate, then the tearing phenomenon is prevented, but the backlight unit cannot maintain constant strobe light intervals causing flicker
Solution Approach 1:
The patent divides the frame into active sections and blank sections, and correspondingly divides the backlight output into strobe light during active sections and flat light during blank sections. This segmentation allows different lighting modes to be applied to different time periods, resolving the contradiction between preventing tearing (requiring variable frame rates) and preventing flicker (requiring constant light intervals).
Solution Approach 2:
The patent implements periodic switching between strobe light and flat light modes synchronized with the variable frame rate. The backlight controller periodically adjusts the lighting mode according to the frame timing, ensuring that strobe light is provided during active sections and flat light during blank sections, thereby maintaining image stability without flicker.
2Object-affected harmful factors
If the backlight unit uses flat light during blank sections to prevent flicker, then flicker is reduced, but the image becomes blurred
Solution Approach 1:
The patent applies different lighting qualities to different sections: strobe light is used during active sections where image data is displayed to ensure clarity, while flat light is used during blank sections where no image data is displayed to prevent flicker. This local differentiation of lighting quality resolves the contradiction between preventing flicker and maintaining image clarity.
3Manufacturing precision
If the backlight unit uses strobe light at variable frame rates, then image clarity is maintained, but the irregular time intervals cause the human eye to recognize flicker
Solution Approach 1:
The patent dynamically adjusts the backlight lighting mode based on the variable frame rate timing. The backlight controller continuously monitors the frame timing and dynamically switches between strobe light and flat light modes, adapting to the variable frame rate while maintaining both image clarity and preventing flicker.
Data Source
AI summary
A display device including: a display panel which includes a plurality of pixels, and outputs image data in an active section of a frame, and does not output image data in a blank section of the frame; and a backlight unit configured to irradiate the display panel with light, wherein a length of the blank section is variable, and the backlight unit is configured to irradiate the display panel with strobe light at the active section, and is configured to irradiate the display panel with a first flat light at the blank section.