Display Driving Circuit Local Quality Brightness Consistency
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Solution Overview
Problem
Large size LCD TVs experience inconsistent display effects due to poor charging near the data line driving terminal, resulting in varying brightness across the panel.
Innovation Solution
A display driving circuit with a detector and drive module that adjusts driving signals based on gate signals from a preset row, using different current sources to enhance charging effectiveness across the panel, ensuring consistent display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display panel size is increased to meet higher size requirements, then the display area is enlarged, but the charging difference between near terminal and far terminal becomes more obvious, resulting in inconsistent display effect
Solution Approach 1:
The patent applies local quality by dividing the display panel into different regions (first display area and second display area) with different grayscale thresholds. The first display area near the driving terminal uses a first grayscale threshold, while the second display area far from the driving terminal uses a second grayscale threshold that is higher than the first. This local differentiation compensates for the charging difference, ensuring consistent display brightness across the entire panel despite the size increase.
2Device complexity
If a single grayscale threshold is used for the entire display panel, then the circuit design is simple, but the display effect is inconsistent due to charging differences across different regions
Solution Approach 1:
The patent implements local quality by setting different grayscale thresholds for different display areas. The processing circuit determines the grayscale threshold based on the specific display area being scanned, using a first grayscale threshold for the first display area and a second grayscale threshold for the second display area. This approach maintains reasonable circuit complexity while significantly improving display brightness consistency across the panel.
Solution Approach 2:
The patent applies dynamics by making the grayscale threshold adjustable based on the display area. Rather than using a fixed threshold, the processing circuit dynamically selects between the first and second grayscale thresholds according to which display area is currently being driven. This dynamic adjustment ensures optimal display performance across different regions without requiring a completely separate circuit for each area.
Data Source
AI summary
The present application provides a display driving circuit and display panel, including a drive, which includes a driving signal output terminal and an enable signal input terminal, the driving signal output terminal being electrically connected with a data line of the display panel; and a detector, which includes a detection signal input terminal and an enable signal output terminal, the detection signal input terminal is electrically connected with a gate signal terminal of a preset row of the display panel, and the enable signal output terminal is electrically connected with the enable signal input terminal of the drive; the detector is for detecting a gate signal of the preset row, and output a corresponding enable signal according to a detection result, and the drive is for outputting different driving signals according to different enable signals.