Display Backlight Driver with Staggered Region Updates
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Solution Overview
Problem
The data update speed of the backlight module in display devices is insufficient to keep up with the display panel's update speed, leading to decreased display contrast, especially when displaying high-speed images.
Innovation Solution
A display device with a backlight module that includes regions of light-emitting elements, a backlight driver with a first controller and a register, and a timing controller that provides determination and driving signals during multiple update periods within a frame period, allowing the register to distribute driving signals across these periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the backlight module updates all driving data during a single frame period, then the control logic is simple, but the data update speed is insufficient to keep up with the display panel's update speed
Solution Approach 1:
The frame period is divided into multiple update periods, and the backlight module is divided into multiple regions. Each region updates its driving data in separate update periods rather than all at once in a single frame period. This segmentation allows the backlight module to process and update data more quickly, matching the display panel's update speed while maintaining manageable control logic through structured timing.
2Illumination intensity
If the backlight module uses multi-zone backlight control, then the display contrast is improved, but the data update speed cannot keep up with high-speed image display
Solution Approach 1:
The backlight module is divided into multiple regions that can be controlled independently (multi-zone), and each region is assigned to update in different update periods within a frame period. This allows the system to maintain multi-zone control capabilities for good display contrast while updating data in a staggered manner that increases overall update speed and keeps pace with high-speed image display requirements.
Solution Approach 2:
The backlight module performs periodic updates in multiple update periods within each frame period. Instead of updating all regions simultaneously once per frame, the system uses periodic staggered updates where different regions are activated in sequence, thereby increasing the effective data update speed while maintaining the multi-zone control structure needed for high contrast display.
Data Source
AI summary
The disclosure provides a display device. The display device includes a display panel, a backlight module, and a timing controller. The backlight module provides a light to the display panel. The backlight module has a plurality of regions. Each of the plurality of regions includes a plurality of light-emitting elements. The backlight module includes a backlight driver. The backlight driver includes a first controller and a register. The timing controller provides a determination signal to the first controller and provides a driving signal to the register. There are a plurality of update periods in a frame period, and the first controller receives the determination signal to determine each of the plurality of update periods. The register stores the driving signal. During each of the plurality of update periods, the register provides the driving signal to the plurality of light-emitting elements of a corresponding region.