Display Driver Wiring Overlap Reduces Bezel Area
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Solution Overview
Problem
Conventional display apparatuses have a significant non-display area, known as bezel area, which limits their miniaturization and portability due to the presence of wirings that cannot be efficiently rearranged to reduce dead space.
Innovation Solution
The display apparatus incorporates a design where signal wirings overlap driver transistors, reducing the dead space by overlapping with source, gate, and drain electrodes of multiple transistors, and utilizing a clock signal wiring that does not overlap with the driver transistors, thereby minimizing the non-display area and decreasing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wirings are arranged in the bezel area, then the display apparatus can function properly, but the non-display area increases
Solution Approach 1:
The patent applies dimensionality change by routing signal wirings vertically through the driver transistor layer rather than horizontally in the bezel area. The first signal wiring overlaps the first driver transistor and connects to the source electrode, while the second signal wiring overlaps the second driver transistor and connects to the gate electrode, effectively utilizing the vertical dimension to reduce bezel area.
Solution Approach 2:
The patent merges the signal wiring path with the driver transistor structure by having wirings overlap and electrically connect to transistor electrodes. This integration allows the wirings to serve dual purposes: transmitting signals and utilizing the transistor layer space, thereby reducing the non-display area.
2Area of stationary object
If signal wirings overlap driver transistors, then the non-display area is reduced, but the resistance may increase
Solution Approach 1:
The patent applies local quality by assigning different functions to different wiring segments. The first signal wiring transmits constant voltage signals and overlaps the source electrode, while the second signal wiring transmits start signals and overlaps the gate electrode. This localized optimization allows the wirings to maintain appropriate electrical characteristics in different regions.
Solution Approach 2:
The patent changes wiring parameters by using different wiring configurations for different signal types. The first signal wiring is designed for constant voltage transmission with overlap over the source electrode, while the second signal wiring is designed for start signal transmission with overlap over the gate electrode, optimizing performance for each signal type.
Data Source
AI summary
A display apparatus includes a display, a driver including a plurality of shift registers arranged along a first direction, the driver providing a driving signal to the display, and a first signal wiring disposed on the driver, extending along the first direction, and transmitting a first driving signal to the plurality of shift resisters. Each of the plurality of shift registers includes at least one driver transistor. The first signal wiring is electrically connected to a source electrode of a first driver transistor and overlaps the first driver transistor.