Trace Design Reducing Bezel Area via Branching
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Solution Overview
Problem
The existing technologies for pixel arrays, such as displays, result in a larger bezel area due to the number of electrical traces spanning the bezel area, especially in corner regions, which affects the form factor and aesthetics of devices.
Innovation Solution
A trace design where at least one electrical trace branches closer to the pixel rows than the row line-driver, reducing the number of electrical traces traversing the bezel region, thereby minimizing the physical extent of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrical traces are branched at or near the row-line drivers, then the pixel rows can be driven by shared signals, but the number of electrical traces spanning the bezel area remains high, resulting in larger bezel area
Solution Approach 1:
The patent segments the trace routing into two distinct zones: a first region containing the pixel array and active traces, and a second region containing the bezel area. By placing branches in the first region and routing only unbranched traces through the second region, the patent segments the trace network to minimize bezel occupancy while maintaining signal sharing functionality.
Solution Approach 2:
The patent resolves the contradiction by transitioning from a two-dimensional planar routing problem to a three-dimensional spatial solution. Traces are routed through different spatial regions (first region vs. second region), allowing branches to exist in one region while keeping the bezel region clear of multiple trace paths.
2Shape
If row-line drivers for corner rows are placed non-adjacent due to physical constraints, then the device can accommodate rounded corners, but multiple sets of electrical traces must span the corner region, increasing bezel area
Solution Approach 1:
The patent segments the device into a pixel array region and a bezel region, with further segmentation of traces into branched traces (in pixel region) and unbranched traces (in bezel region). This segmentation allows corner row drivers to be positioned for rounded corners while minimizing trace occupancy in the bezel area.
Solution Approach 2:
The patent extracts the branching operation from the bezel region and relocates it to the pixel array region. By taking out the branches from the second region and placing them in the first region, the patent eliminates unnecessary trace multiplicity in the corner bezel regions while maintaining driver positioning flexibility for rounded corners.
Data Source
AI summary
Techniques and apparatuses are described that implement a trace design to reduce bezel area (106). An apparatus includes a pixel array (302) comprising pixel rows (112). The apparatus also includes a row line-driver (110-1) configured to provide electrical signals to at least two of the pixel rows (112-1, 112-2). The apparatus further comprises a plurality of electrical traces (202) that connect the row line-driver (110-1) to the pixel rows. At least one of the electrical traces (202) comprises a branch (210) such that a signal carried by the at least one of the electrical traces (202) enters the at least two of the pixel rows (112-1, 112-2). The branch is disposed closer to the pixel rows (112-1, 112-2) than the row line-driver (110-1). In this way, a number of the electrical traces (202) crossing a bezel area (106) is reduced compared to branching near the row line-driver (110-1).