Multi-feeding Gate Driver for LCD Bezel Reduction
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Solution Overview
Problem
Liquid crystal display (LCD) devices face challenges in reducing bezel size and enhancing aesthetic design while maintaining driving reliability and display quality, particularly due to the limitations of gate driving signal delay caused by large panel sizes and the GIP type gate driver configuration.
Innovation Solution
The implementation of a multi-feeding gate driving signal system, where one horizontal gate line is connected to multiple vertical gate lines, allowing the driving IC to supply the same gate driving signal to multiple vertical gate lines simultaneously, thereby reducing bezel size and preventing signal delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a large liquid crystal panel is used to expand screen size, then display area is improved, but gate driving signal delay increases
Solution Approach 1:
The gate driver is divided into multiple independent gate driver circuits, with each circuit responsible for driving a specific portion of the liquid crystal panel. This segmentation reduces the driving distance and signal delay for each circuit while maintaining the overall large display area capability.
Solution Approach 2:
The patent transitions from a single-sided gate driver configuration to a dual-sided gate driver configuration. By placing gate drivers on both the upper and lower sides of the liquid crystal panel, the effective driving distance is halved, reducing signal delay while maintaining large panel support.
2Ease of manufacture
If GIP type gate driver is used to reduce manufacturing cost, then manufacturing cost is improved, but bezel size increases
Solution Approach 1:
The patent moves the gate driver from a horizontal side-configuration to a vertical top/bottom configuration. By placing gate drivers on the upper and lower sides of the panel rather than on the left and right sides, the horizontal bezel width is reduced while maintaining the GIP type's cost advantages.
3Shape
If bezel size is reduced to enhance aesthetic design, then appearance is improved, but driving reliability deteriorates
Solution Approach 1:
The gate driver circuit is segmented into multiple independent circuits distributed on opposite sides of the panel. This segmentation allows for shorter signal paths and reduced interference, maintaining driving reliability even with reduced bezel dimensions.
Solution Approach 2:
By reorienting the gate driver configuration from horizontal to vertical placement, the patent achieves narrower horizontal bezels while maintaining adequate signal transmission paths for reliable operation.
Data Source
AI summary
Disclosed is an LCD device that includes a plurality of horizontal gate lines provided in a horizontal direction in a liquid crystal panel, a plurality of data lines and a plurality of vertical gate lines provided in a vertical direction in the liquid crystal panel, and a driving IC connected to the plurality of vertical gate lines to supply a gate driving signal, and connected to the plurality of data lines to supply data voltages. One of the horizontal gate lines is connected to at least two vertical gate lines, and the driving IC supplies the same gate driving signal to the at least two vertical gate lines.