Display Panel Gate Driver Extraction for Bezel Reduction
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Solution Overview
Problem
Conventional display panel structures face limitations in minimizing the non-display area (bezel) due to the location of the gate driver, which restricts the reduction of the first-direction non-display area.
Innovation Solution
The display device incorporates a display panel with gate lines and data lines arranged in a diagonal or zigzag pattern, along with gate and data dummy lines, and a timing controller that outputs control signals to generate gate and data signals, allowing for the minimization of the non-display area by optimizing the arrangement of pixels and voltage polarity inversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the gate driver is mounted on the first-direction non-display area, then the gate driver can be directly provided on the display panel through thin film process, but the first-direction non-display area cannot be minimized due to the gate driver location
Solution Approach 1:
The patent extracts the gate driver from the display panel structure by mounting it on a separate substrate (PCB or FPCB) connected through a flexible printed circuit board. This separation allows the display panel to minimize its non-display area while the gate driver maintains its driving function externally.
Solution Approach 2:
The patent transitions the gate driver mounting from a planar arrangement on the display panel to a three-dimensional configuration using a flexible printed circuit board that connects the display panel to the gate driver substrate, enabling space optimization in the display area.
2Area of stationary object
If the non-display area is minimized to meet consumer needs, then the display area can be maximized, but the gate driver location becomes problematic
Solution Approach 1:
The gate driver is extracted from the display panel and mounted on a separate substrate, allowing the display area to be maximized while the gate driver functions externally through the flexible printed circuit board connection.
Solution Approach 2:
The flexible printed circuit board acts as an intermediary component that transmits control signals from the gate driver to the display panel, enabling the gate driver to be located outside the display area while maintaining functional connectivity.
3Device complexity
If data lines cross gate lines, then the display panel structure is simplified, but signal interference may occur between the lines
Solution Approach 1:
The patent implements local shielding by providing shield lines between data lines and gate lines in regions where they cross or are in close proximity. The shielding structure is applied locally at critical interference points rather than throughout the entire display panel, reducing signal interference while maintaining overall structural simplicity.
Data Source
AI summary
A display device includes a display panel, a timing controller, a gate driver, and a data driver. The display panel includes a display area for displaying an image and a non-display area adjacent to one side of the display area. The display area includes gate lines, data lines, gate dummy lines, a data contact portion, and pixels. The data lines cross and are isolated from at least a part of the gate lines. The gate dummy lines are parallel with and are spaced from the gate lines. The data contact portion couples the gate dummy lines and the data lines at one side of a second direction perpendicular to the first direction.