Mini-LED Backlight Compensation for Brightness Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing backlight units with mini-LEDs face issues of uneven brightness, leading to increased manufacturing time and cost due to the need for structural changes or compensation signals that require excessive data storage and processing.
Innovation Solution
A method for compensating the brightness of mini-LEDs in a backlight unit by acquiring control signals and determining row and column compensation values, which are used to adjust the brightness of each mini-LED, thereby achieving uniform brightness without altering the backlight unit's structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If structural modifications (inserting film or reflector) are made to solve uneven brightness, then brightness uniformity is improved, but manufacturing time increases and cost increases
Solution Approach 1:
The patent replaces mechanical/structural modifications (inserting film or reflector) with a signal processing approach. Instead of physically changing the backlight unit structure, the system uses a controller to adjust drive signals based on compensation values stored in memory, achieving brightness uniformity through electrical control rather than mechanical changes.
Solution Approach 2:
The patent changes the operational parameters (drive signals) of the mini-LEDs based on pre-determined compensation values. By storing compensation values in memory and applying them through signal processing, the system achieves brightness uniformity by adjusting electrical parameters rather than modifying physical structure.
2Manufacturing precision
If structural modifications are made to solve uneven brightness, then brightness uniformity is improved, but cost increases
Solution Approach 1:
The patent replaces expensive structural modifications (film, reflector installation) with a low-cost signal processing system. The controller reads compensation values from memory and adjusts drive signals accordingly, eliminating the need for additional physical components and reducing manufacturing complexity.
Solution Approach 2:
The patent uses pre-stored compensation values (essentially data copies) to achieve brightness uniformity instead of physical modifications. The compensation values are determined in advance and stored in memory, allowing the system to replicate the effect of structural modifications through software/signals without actual physical changes.
3Manufacturing precision
If compensation signals are used to address brightness issues, then brightness uniformity is improved, but data storage and processing requirements increase
Solution Approach 1:
The patent segments the backlight unit into multiple mini-LEDs with individually addressable compensation values. By organizing compensation data in a structured manner within memory and processing signals row by row or in blocks, the system reduces the complexity of handling large amounts of compensation data for all LEDs simultaneously.
Data Source
AI summary
The present disclosure provides a backlight compensation method, device and system, and a storage medium. The method is used to compensate brightness of a plurality of mini-LEDs in a backlight unit, where the plurality of mini-LEDs include M rows and N columns, and both M and N are positive integers greater than 1, and the method includes: acquiring a control signal for controlling the brightness of the backlight unit, and acquiring a row compensation value corresponding to mini-LEDs in each row and a column compensation value corresponding to mini-LEDs in each column; compensating the mini-LEDs in each row and the mini-LEDs in each column according to the row compensation value and the column compensation value, to obtain a compensated control signal; and controlling the brightness of the backlight unit according to the compensated control signal.