Backlight Partition Luminance Control for Halation Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices experience halation due to uneven light emission luminance between backlight partitions, leading to suboptimal display quality.
Innovation Solution
A method and controller for adjusting the light emission luminance of adjacent backlight partitions to minimize differences, ensuring that the absolute value of the luminance difference between them is within a target threshold, thereby reducing halation and improving display effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the light emission luminance of backlight partitions is not adjusted, then the backlight module structure remains simple, but halation occurs due to uneven luminance between adjacent backlight partitions
Solution Approach 1:
The patent adjusts the light emission luminance parameter of backlight partitions dynamically based on display content requirements. By changing the luminance parameter of individual backlight partitions rather than uniformly controlling all partitions, the system reduces halation effects while maintaining manageable control complexity through selective adjustment of only necessary partitions.
Solution Approach 2:
The patent applies different luminance control strategies to different local regions (backlight partitions) based on their specific requirements. Instead of uniform control, each backlight partition can have its luminance independently adjusted according to the local display needs, thereby reducing halation in specific areas without affecting the entire backlight system.
2Manufacturing precision
If the light emission luminance of each backlight partition is independently controlled, then display quality improves, but the control system complexity increases
Solution Approach 1:
The patent selectively adjusts luminance parameters of backlight partitions based on calculated differences between adjacent partitions. By applying parameter changes only when and where needed (when luminance difference exceeds threshold), the system achieves improved luminance uniformity without requiring complex control for all partitions in all conditions.
Solution Approach 2:
The patent implements local quality control by adjusting luminance of specific backlight partitions based on their individual luminance differences with adjacent partitions. This localized adjustment approach achieves high luminance uniformity (precision) while avoiding the need for uniformly complex control across the entire backlight system.
3Reliability
If the luminance difference between adjacent backlight partitions is large, then the backlight module has simpler control logic, but display effectiveness decreases due to halation
Solution Approach 1:
The patent dynamically changes the luminance parameters of backlight partitions based on calculated luminance differences. When the difference between adjacent partitions exceeds a threshold, the system adjusts parameters to reduce the difference, thereby improving display effectiveness while managing adjustment complexity through threshold-based conditional logic.
Solution Approach 2:
The patent implements a feedback mechanism where the luminance differences between adjacent backlight partitions are continuously monitored and used to guide further adjustments. This feedback loop ensures display effectiveness by reducing halation-causing luminance differences while keeping control logic manageable through systematic feedback-based adjustment rules.
Data Source
AI summary
Provided are a method for controlling backlight of a display device, a backlight controller for a display device, and a display device. The method includes: identifying a light emission luminance of each backlight partition in a backlight module according to display luminances of the plurality of display partitions; when the plurality of backlight partitions include two adjacent backlight partitions and an absolute value of a difference between the light emission luminance of the two adjacent backlight partitions is greater than a target threshold, adjusting the light emission luminance of at least one of the two adjacent backlight partitions such that the absolute value of the difference between the light emission luminances of the two adjacent backlight partitions is decreased; and after the luminance is adjusted, controlling light-emitting of each backlight partition.