Gate Driver Bidirectional Pulse Output for Display Luminance Uniformity
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Solution Overview
Problem
Display apparatuses experience luminance differences between the sides of gate lines due to uneven output of gate pulses, affecting the overall display quality.
Innovation Solution
A display apparatus design that alternately outputs gate pulses from both sides of the gate lines using a gate driver and connection lines, with the gate driver positioned in a non-display area and connected to the gate lines in a manner that divides the output between a first and second side based on a center portion, ensuring balanced luminance across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If gate pulses are sequentially output from one side of the gate lines, then the gate driver structure is simple, but luminance difference occurs between sides of the gate lines
Solution Approach 1:
The gate lines are divided into two groups: odd-numbered gate lines receiving pulses from the first side and even-numbered gate lines receiving pulses from the second side. This segmentation allows simultaneous driving from both sides, eliminating luminance differences while maintaining a relatively simple gate driver structure through systematic division of the driving task.
Solution Approach 2:
The patent transitions from unidirectional pulse output (one side) to bidirectional pulse output (both sides) by adding connection lines extending in opposite directions from the gate driver. This dimensional change in pulse distribution enables balanced luminance across the display panel while keeping the gate driver structure manageable.
2Illumination intensity
If gate pulses are alternately output from both sides of the gate lines, then luminance uniformity is improved, but the connection line structure becomes more complex
Solution Approach 1:
Different connection lines are configured with different orientations: first connection lines extend in a first direction to reach odd gate lines, while second connection lines extend in a second direction to reach even gate lines. This local differentiation in connection line configuration achieves luminance uniformity while organizing the complexity in a systematic, manageable manner.
Solution Approach 2:
The connection line structure employs asymmetric configuration where odd and even gate lines are connected differently to the gate driver through connection lines extending in opposite directions. This asymmetric design achieves balanced luminance output while the systematic asymmetry keeps the overall structure organized and manageable.
Data Source
AI summary
A display apparatus sequentially outputs gate pulses to one side and the other side of gate lines. The display apparatus includes a display panel provided with four non-display areas outside a display area, a gate driver provided in a first non-display area of the non-display areas, a data driver provided in the first non-display area, and a controller for controlling the gate driver and the data driver. Gate lines connected to connection lines extended from the gate driver are provided in a second direction different from a first direction in which the connection lines are provided. Gate pulses supplied from the gate driver to the gate lines through the connection lines are alternately output from a first side and a second side of the gate lines. The first side and the second side are divided from each other based on a center portion of the gate lines as a boundary.