Mini LED Backlight Pre-lightening for Motion Shadow Elimination
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Solution Overview
Problem
MINI LED backlight television modules experience shadowing issues due to the lack of optical lenses, leading to non-uniform brightness and darkness distribution when bright areas move into black regions, affecting picture quality.
Innovation Solution
A method and device that analyze pixel brightness and color information across frames to adjust the backlight refresh rate and pre-lighten frames, using a preset multiple to optimize image display transitions and prevent shadowing, with black shielding applied as needed to maintain uniform motion transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If MINI LED backlight module is used without optical lens, then the thickness of the whole machine is reduced and manufacturing precision is improved, but non-uniform brightness distribution and shadowing effects occur in motion pictures
Solution Approach 1:
The patent applies pre-lightening technology where the backlight module performs preliminary illumination on areas that will become bright in the next frame before they actually need to be bright. By analyzing motion vectors and brightness changes between frames, the system activates corresponding backlight zones in advance, ensuring uniform brightness transitions and eliminating shadowing effects at motion edges.
2Device complexity
If MINI LED backlight module is used without optical lens, then device complexity is reduced, but shadowing effects and non-uniform brightness distribution occur when bright areas move into black regions
Solution Approach 1:
The patent implements a feedback control mechanism where the backlight control module continuously monitors brightness information and motion vectors from consecutive frames. Based on this feedback, it dynamically adjusts the illumination state of different backlight zones, applying pre-lightening to areas that will become bright and maintaining uniform brightness distribution without requiring complex optical lenses.
3Illumination intensity
If ordinary LED backlight multi-area dynamic dimming is used, then picture quality is improved, but the optical lens cannot keep pace with the miniaturization of MINI LED
Solution Approach 1:
The patent extracts and removes the optical lens component from the backlight module, replacing it with a control-based solution. By taking out the physical lens and substituting it with algorithmic pre-lightening control, the system maintains picture quality and uniform brightness distribution while achieving compatibility with miniaturized MINI LED technology.
Data Source
AI summary
The present disclosure relates to a method and a device for adjusting a MINI LED backlight television picture, and discloses that when a television backlight module adopts a MINI LED backlight lamp bead, according to a route of a motion track in a motion picture, the next dark field in an edge area is pre-lightened at a higher refresh rate or an edge of a bright picture is subjected to black shielding when a brightness of previous and next frames changes obviously, thereby improving the picture display effect.