Display Panel Side-Wire ESD Protection for Narrow Bezels
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Solution Overview
Problem
The existing mass transfer technology for micro light-emitting diode displays faces challenges in achieving high-resolution and large-size seamless splicing due to electrostatic breakdown during manufacturing, which affects yield and display quality, particularly due to inadequate electrostatic protection in narrow bezel designs.
Innovation Solution
A display panel with an electrostatic protection layer connected to the ground line, overlapping with side wires, and a thin insulation layer to prevent static electricity buildup, allowing for effective electrostatic discharge without increasing the bezel width, featuring a structure with multiple electrostatic protection parts and insulation layers to ensure reliable connection and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the bezel width is reduced to achieve narrow bezel design, then the display area is increased, but electrostatic protection capability deteriorates
Solution Approach 1:
The electrostatic protection layer extends from the first face through the side face to the second face of the base substrate, utilizing the third dimension (depth/thickness) to provide electrostatic protection without occupying additional lateral space that would increase bezel width
Solution Approach 2:
The electrostatic protection layer is integrated within the existing bezel structure, nesting the protection function inside the current dimensional constraints rather than adding external protection elements that would increase bezel width
2Reliability
If traditional electrostatic protection structures are used, then electrostatic protection is provided, but the bezel width increases
Solution Approach 1:
The electrostatic protection layer utilizes the vertical dimension by extending through the thickness of the base substrate via the side face, providing protection without increasing the horizontal bezel width
Solution Approach 2:
The electrostatic protection layer is strategically positioned to overlap with side wires in the peripheral region where electrostatic discharge is most critical, providing localized protection exactly where needed rather than uniform protection across the entire bezel
3Adaptability or versatility
If side wires are added for signal transmission, then display functionality is improved, but electrostatic breakdown risk increases
Solution Approach 1:
The electrostatic protection layer acts as an intermediary between the side wires and the external environment, providing a discharge path for static electricity that prevents direct breakdown of the side wires and their connected display components
Solution Approach 2:
The electrostatic protection layer is positioned to overlap with side wires before electrostatic discharge can occur, preemptively providing a safe discharge path that prevents electrostatic breakdown of the side wires
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively addresses electrostatic breakdown issues, enhancing the yield and display quality by providing robust electrostatic protection while maintaining a narrow bezel design, suitable for seamless splicing of micro light-emitting diode displays.
Implementation Method 1
an electrostatic protection layer electrically connected to the ground line, wherein an orthographic projection of the electrostatic protection layer on the side face is at least partially overlapped with orthographic projections of the plurality of side wires on the side face
Data Source
AI summary
A display panel and a display apparatus are provided. The display panel includes: a base substrate having a first face, a second face, and a side face, the first face including a display region and a peripheral region; multiple first bonding electrodes in the peripheral region each being electrically connected to a display signal line on the first face and extending from the display region to the peripheral region; multiple driving signal lines on the second face of the base substrate, wherein at least one driving signal line is a ground line; multiple side wires each electrically connecting one driving signal line to one first bonding electrode via the side face; and an electrostatic protection layer electrically connected to the ground line and having an orthographic projection on the side face that is at least partially overlapped with orthographic projections of the side wires on the side face.