Overlapped Gate Driver Structure for Narrow-Bezel Display Panels
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Solution Overview
Problem
Display devices have dead spaces where images cannot be displayed due to the arrangement of drivers and lines in non-display areas, leading to inefficiencies.
Innovation Solution
A display device design with a stacked structure of first and second gate drivers alternately connected to pixel rows, reducing the dead space by overlapping and electrically connecting them, and ensuring their stages align with pixel row lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single gate driver is arranged in the non-display area, then the device structure is simple, but the dead space cannot be reduced
Solution Approach 1:
The patent transitions from a planar arrangement of the gate driver to a three-dimensional stacked structure. The first and second gate drivers are positioned in different layers (first and second substrate layers) above each other, utilizing the vertical dimension to reduce the horizontal footprint in the non-display area while maintaining functional complexity.
Solution Approach 2:
The stacked gate driver structure embeds one gate driver within the space above another gate driver. The second gate driver is formed on the first substrate layer while the first gate driver is formed on the second substrate layer directly above it, creating a nested configuration that maximizes space utilization in the non-display area.
2Area of stationary object
If gate drivers are stacked vertically, then the non-display area is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The gate driver function is segmented into two separate gate drivers (first and second gate drivers) positioned in different layers. Each gate driver can be independently designed, fabricated, and tested, which simplifies the overall manufacturing process compared to creating a single complex integrated driver, while still achieving vertical stacking to reduce dead space.
3Productivity
If the first and second gate drivers are alternately connected to pixel rows, then the display coverage is improved, but the electrical connection complexity increases
Solution Approach 1:
The first and second gate drivers are alternately connected to pixel rows in a periodic pattern. The first gate driver connects to odd-numbered pixel rows while the second gate driver connects to even-numbered pixel rows, creating a regular alternating connection pattern that simplifies the electrical connection architecture compared to complex sequential control schemes, while still achieving full display coverage.
Data Source
AI summary
A display device includes a display panel including a display area, and a non-display area adjacent to the display area, pixels in the display area, and defining first to n-th pixel rows, n being a natural number that is greater than 1, and a gate driver in the non-display area, electrically connected to the pixels, and including a first gate driver, and a second gate driver above the first gate driver.