Backlight Driving Method for Mini LED Display Delay Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The delay between backlight driving and display panel driving in display devices, such as mini LED and direct-lit LCD devices, results in a delayed image and suboptimal display effect due to the lengthy process of rearranging driving signals for local area dimming data.
Innovation Solution
A driving method for the backlight module that generates mapping information to directly drive lamp beads in local dimming areas based on preset positional relationships, allowing the backlight driving circuit to receive and process local area dimming data sequentially, thereby eliminating the need for rearranging driving signals and reducing delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the backlight driving circuit receives all local area dimming data first and then rearranges driving signals according to preset positional relationships, then the lamp beads can be driven correctly, but the delay between backlight driving and display panel driving increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing mapping information that directly correlates local area dimming data with corresponding lamp bead channels. This mapping is configured in advance so that when display data is converted to local area dimming data, the backlight driving circuit can directly use this data without needing to perform complex rearrangement operations, thereby reducing delay time while maintaining correct driving sequence
2Productivity
If the backlight driving circuit processes and rearranges all local area dimming data before driving lamp beads, then accurate local dimming control is achieved, but the operational efficiency and productivity decrease
Solution Approach 1:
The patent applies segmentation by dividing the backlight driving process into independent channel segments. Each local area dimming data corresponds to a specific channel segment through pre-established mapping information. This allows the backlight driving circuit to process and drive lamp beads in parallel across different channels simultaneously, improving operational efficiency while maintaining precise control over each local dimming area
3Loss of time
If mapping information is generated and used to directly drive lamp beads based on preset positional relationships, then data processing time is reduced, but the device complexity increases due to mapping information storage
Solution Approach 1:
The patent applies copying by creating a simplified mapping information structure that replicates the positional relationship between local area dimming data and lamp bead channels. This mapping is stored in a compact format that can be quickly retrieved and used directly for driving operations, reducing data processing time while avoiding the complexity of complex calculation or rearrangement algorithms
Data Source
AI summary
A driving method for a backlight module and a display device are disclosed. The driving method includes: generating mapping information from each local dimming area to the corresponding piece of local area dimming data according to preset positional relationships between a backlight driving chip and lamp beads in the backlight module; receiving, by a timing control chip, a frame of display data, and converting the display data into panel driving data and corresponding multiple pieces of local area dimming data; receiving, by a backlight driving circuit, the multiple pieces of local area dimming data in sequence, turning on the channel corresponding to the current local dimming area in turn according to the mapping information, and driving the lamp beads in the current local dimming area.