Television Backlight Dimming via Non-Uniform LED Spacing
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Solution Overview
Problem
As television screens enlarge, the number of backlight LED lamp regions increases, leading to resource constraints and significantly higher production costs due to the limitations of microcontroller unit (MCU) and system-on-a-chip (SoC) resources, which negatively impacts the local dimming effect.
Innovation Solution
A television backlight dimming method that adjusts the brightness of LED lamps in non-reference regions based on the brightness of lamps in a reference region and a preset distance rule, where the distance between LED lamps follows an arithmetic or geometric progression from the center to the edge, allowing for a non-uniform arrangement without increasing the number of lamp regions, thereby enhancing lamp density and dimming effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of LED lamp regions is increased to improve local dimming effect on large-screen televisions, then the local dimming effect is improved, but the production cost increases significantly and MCU/SoC resources are overwhelmed
Solution Approach 1:
The patent applies local quality by dividing the backlight into different regions (first region with uniform intervals and second region with non-uniform intervals) and applying different lamp arrangement strategies to different areas. The center region uses denser uniform spacing while edge regions use sparser non-uniform spacing, optimizing the local dimming effect where it matters most while reducing overall lamp count and cost.
Solution Approach 2:
The patent segments the backlight area into multiple regions (first region and second region) with different lamp arrangement characteristics. This segmentation allows the system to achieve good local dimming effect in critical areas without uniformly increasing lamp density across the entire backlight, thereby controlling production costs and resource usage.
2Reliability
If the number of LED lamp regions is increased to improve local dimming effect, then the local dimming effect is improved, but the MCU and SoC terminal resources are exceeded
Solution Approach 1:
By applying different lamp arrangement strategies to different regions, the patent reduces the total number of lamps required, which directly reduces the computational burden on MCU and SoC resources while maintaining adequate local dimming performance in critical areas.
Solution Approach 2:
The patent applies partial action by concentrating lamp density only where needed (first region with uniform intervals) rather than uniformly distributing high density across the entire backlight. This partial densification achieves the necessary dimming effect without the excessive resource consumption that would result from uniform high-density arrangement.
3Device complexity
If LED lamps are arranged at equal intervals to simplify the structure, then the structure is simple and backlight is uniform, but the lamp density is insufficient for large-screen televisions
Solution Approach 1:
The patent segments the backlight into regions with different spacing characteristics. The first region maintains simple uniform spacing while the second region implements non-uniform spacing, achieving both structural simplicity and adequate lamp density through regional differentiation rather than requiring complex uniform high-density arrangement across the entire backlight.
Solution Approach 2:
By applying uniform interval arrangement only to the first region and non-uniform interval arrangement to the second region, the patent achieves local optimization of lamp density where needed while maintaining overall structural simplicity. This local differentiation allows the system to achieve sufficient total lamp density without implementing complex spacing patterns everywhere.
Data Source
AI summary
The present application provides a television backlight dimming method, apparatus and device, and a computer-readable storage medium. The television backlight dimming method includes: acquiring a minimum horizontal distance between an LED lamp in a reference region and an LED lamp in a non-reference region; and dimming the brightness of each of the LED lamps in the non-reference region according to the brightness of the LED lamp in the reference region, the minimum horizontal distance and a preset distance rule.