Spliced Display Backlight Edge Partition Brightness Control
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Solution Overview
Problem
Spliced display devices experience uneven brightness due to differences in pixel grey scale statistical brightness between adjacent display partitions, leading to inconsistencies in backlight partition brightness across modules.
Innovation Solution
A backlight control method that adjusts the brightness of edge backlight partitions in each module based on the initial brightness value of adjacent modules, using a formula to calculate an adjusted brightness value that reduces differences between adjacent partitions, thereby improving brightness uniformity across the spliced display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If 3D dynamic local dimming technology is used to control backlight brightness according to pixel grey scale statistical brightness, then high dynamic contrast and picture detail display capability are improved, but brightness uniformity deteriorates due to differences between adjacent display partitions
Solution Approach 1:
The patent applies local quality by differentiating between edge backlight partitions and non-edge backlight partitions. Edge backlight partitions (located at boundaries between display modules) receive special brightness adjustment based on adjacent module data, while non-edge partitions use standard local dimming control. This targeted approach maintains high dynamic contrast in image areas while correcting brightness uniformity at module boundaries.
Solution Approach 2:
The patent implements feedback by using the initial brightness values of adjacent backlight partitions as reference data for adjusting edge backlight partitions. The control module continuously monitors brightness differences between adjacent modules and dynamically adjusts edge partition brightness to compensate for discrepancies, creating a closed-loop control system that maintains brightness uniformity across module boundaries.
2Productivity
If each display module independently controls its backlight partitions based on local pixel grey scale statistical brightness, then local dimming performance is improved, but brightness consistency across spliced modules deteriorates
Solution Approach 1:
The patent merges the control strategies of adjacent display modules by sharing brightness data across module boundaries. The control module of each display module not only controls its own backlight partitions but also receives and processes brightness data from adjacent modules. This merged control approach ensures that edge backlight partitions are adjusted based on comprehensive information from both sides of the boundary, achieving consistent brightness across the entire spliced display.
Solution Approach 2:
The control module acts as an intermediary that mediates between independent display modules. It receives initial brightness values from adjacent modules, processes this information, and generates adjusted brightness values for edge backlight partitions. This intermediary function bridges the gap between independently controlled modules, ensuring seamless brightness transitions at boundaries while preserving local dimming capabilities within each module.
Data Source
AI summary
Disclosed is a spliced display device and a backlight control method therefor. The spliced display device includes a plurality of display modules that include respective backlight modules. Each of the backlight modules includes a plurality of backlight partitions, of which a first backlight partition is located at edge of a corresponding backlight module of the backlight modules. The backlight control method comprises the steps of obtaining an initial brightness value and a reference brightness value for the first backlight partition, adjusting the initial brightness value of the first backlight partition according to the reference brightness value to obtain an adjusted brightness value for the first backlight partition, and controlling the brightness of the first backlight partition according to the adjusted brightness value.