Edge-Type Backlight Local Dimming Control via Block-Unit Mapping
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Solution Overview
Problem
Conventional edge-type backlight modules face challenges in local dimming control due to the mismatch between the number of variables and equations, leading to failed dimming control operations when dividing the display area into a large number of display blocks.
Innovation Solution
The display area is divided into a number of display blocks equal to or fewer than the number of backlight units, allowing for proper luminance settings to be determined through weighted combinations of backlight unit luminance values, ensuring that the number of variables matches the number of equations and enabling successful local dimming control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display area is divided into a large number of display blocks to improve local dimming precision, then the dimming control operation fails due to mismatch between number of variables and equations
Solution Approach 1:
The patent divides the display area into multiple display blocks and assigns multiple backlight units to each block. This segmentation allows the system to handle the mathematical relationship between variables (backlight unit luminance values) and equations (display block luminance requirements) by ensuring there are sufficient variables to solve the system of equations, thereby enabling reliable local dimming control while maintaining precision.
2Reliability
If multiple backlight units are assigned to each display block to ensure sufficient luminance variables, then the system complexity increases
Solution Approach 1:
The patent creates a universal mapping relationship between display blocks and backlight units that can be applied regardless of the specific number of blocks or units. The method establishes a systematic approach where multiple backlight units serve multiple display blocks through weighted combinations, providing a multi-functional control mechanism that reduces system complexity by creating a reusable control framework.
Data Source
AI summary
A local dimming control method and apparatus of an edge-type backlight module are provided. The edge-type backlight module has a plurality of backlight units positioned at at least one side of a display area. The local dimming control apparatus includes: a configuration unit, for dividing the display area into a plurality of display blocks; and a local dimming control unit, coupled to the configuration unit, for setting respective backlight intensities of the display blocks through controlling a plurality of luminance settings of the backlight units. The local dimming control method includes: dividing the display area into a plurality of display blocks; and performing a local dimming control operation to set respective backlight intensities of the display blocks through controlling a plurality of luminance settings of the backlight units.