Dynamic Backlight Partitioning for Display Edge Halo Reduction
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Solution Overview
Problem
Existing display technologies face challenges in achieving ideal dimming effects at the edges of high-resolution pictures due to large backlight partitions, leading to issues like halos and difficulty in adjusting display fineness.
Innovation Solution
A display module with a backlight structure that adjusts the quantity and area of backlight partitions based on display modes, with more partitions and smaller areas in high-resolution modes to minimize halos and improve edge clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the backlight module uses a small number of backlight partitions with large area, then the device complexity is reduced, but halos appear at the edge of the picture and dimming effects are poor
Solution Approach 1:
The backlight module is divided into multiple independent backlight partitions (first, second, third, and fourth partitions) with different areas. This segmentation allows each partition to be independently controlled, enabling precise dimming at different regions of the display, particularly reducing halo effects at picture edges while maintaining simplicity in the overall control structure.
2Manufacturing precision
If the backlight module uses a large number of backlight partitions with small area, then the dimming precision is improved, but the device complexity increases
Solution Approach 1:
Different backlight partitions are designed with different areas according to the local dimming requirements of different display regions. The first and second partitions have different areas, as do the third and fourth partitions, allowing each region to have the appropriate level of granularity for its specific dimming needs, optimizing precision without uniformly increasing complexity across the entire backlight module.
3Measurement precision
If the display module operates in high-resolution mode, then the display quality is improved, but halos appear at the edge due to large backlight partition area
Solution Approach 1:
The backlight module dynamically adjusts the lighting state of different backlight partitions based on the displayed picture content and resolution mode. In high-resolution modes, the system can activate smaller-area partitions (such as the third and fourth partitions) to provide finer dimming control at picture edges, thereby reducing halo effects while maintaining high display quality.
Data Source
AI summary
A display module and a driving method thereof, and a display device are provided. The display module includes a backlight structure including a plurality of backlight partitions. The display module includes a first display mode and a second display mode. Resolution of the display module in the first display mode is greater than the resolution of the display module in the second display mode. In the first display mode, a quantity of the plurality of backlight partitions of the backlight structure is n1, and an area of one of the plurality of backlight partitions of the backlight structure is S1. In the second display mode, the quantity of the plurality of backlight partitions of the backlight structure is n2, and the area of one of the plurality of backlight partitions of the backlight structure is S2, with n1>n2, and S1<S2.