Bridge Pattern Routing for Compact Display Area
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Solution Overview
Problem
Existing flat panel display devices face challenges in reducing the non-display portion, such as the bezel, to achieve lighter and thinner designs with larger display screens, while maintaining effective pixel driving and touch sensor functionality.
Innovation Solution
The display device incorporates a main and secondary display portion with different widths, a corner region having an interior angle between 180° and 300°, and a bridge pattern connecting transistor electrodes to data lines in a different layer, along with separate gate drivers for each portion, allowing for efficient pixel driving and touch sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the non-display portion (bezel) is reduced to achieve lighter and thinner display devices with larger display screens, then the display area and device thinness are improved, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies dimensionality change by routing the data line from the first substrate through a via hole in the second substrate to connect to the transistor electrode on the opposite side. This three-dimensional wiring approach allows the data line to bypass the need for extended non-display portions, enabling compact pixel electrode arrangements that increase the display area while maintaining manageable structural complexity through vertical integration.
2Area of stationary object
If the data line is extended to reach the pixel electrode in compact designs, then the display area is increased, but the manufacturing precision requirements increase due to complex routing
Solution Approach 1:
The patent resolves the routing precision challenge by transitioning from two-dimensional planar routing to three-dimensional vertical routing. The data line connects to the pixel electrode through a via hole that penetrates the second substrate, allowing the data line to reach the pixel electrode without requiring long, complex lateral extensions. This vertical connection approach simplifies the routing geometry and reduces the precision requirements for data line positioning while still enabling compact display designs with increased display area.
Data Source
AI summary
A disclosed display device comprises a data line of a display panel, a first switching circuit of the display panel, the first switching circuit including an input and a transistor to pass a test voltage from the input of the first switching circuit to a transistor electrode of the transistor, and a bridge pattern of the display panel, the bridge pattern electrically connecting the transistor electrode to the data line, the bridge pattern being in a different layer of the display panel than the transistor electrode.