Display Device Shield Electrodes Minimize Non-Display Area
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Solution Overview
Problem
Conventional display devices have a significant non-display area due to the placement of drive integrated circuits and printed circuits, which limits the reduction of the bezel size and affects the overall display efficiency.
Innovation Solution
The implementation of a display device design where a source driver and a gate driver are attached on one side of the display panel, utilizing a specific layer configuration with conductive layers, insulating layers, and shield electrodes to minimize the non-display area by optimizing the placement of horizontal and vertical scan lines, data lines, and pixel electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive integrated circuits and printed circuits are placed on the glass substrate, then the display device can be driven, but the non-display area increases
Solution Approach 1:
The patent transitions from placing drive circuits on the glass substrate surface to stacking them in vertical layers above the substrate. Multiple conductive layers (first conductive layer with horizontal scan lines, second conductive layer with vertical scan lines and data lines, third conductive layer with shield electrodes) are arranged in the thickness direction, utilizing the Z-dimension to reduce the footprint area.
Solution Approach 2:
The patent implements a nested structure where multiple functional layers are stacked: the first conductive layer is nested within insulating layers, which are nested within and around the second and third conductive layers. The shield electrodes in the third conductive layer are positioned to cover edges of vertical scan lines in the second conductive layer, creating a nested arrangement that optimizes space utilization.
2Area of stationary object
If the non-display area is reduced, then the bezel size decreases, but signal attenuation and delay increase
Solution Approach 1:
The patent introduces insulating layers as intermediaries between conductive layers. The first insulating layer is disposed between the first conductive layer (horizontal scan lines) and the second conductive layer (vertical scan lines and data lines), while the second insulating layer is disposed between the second and third conductive layers. These intermediary insulating layers prevent direct contact and electrical interference between adjacent conductive elements, maintaining signal integrity in the compact stacked structure.
Solution Approach 2:
The patent applies different functional properties to different regions of the conductive structure. Shield electrodes in the third conductive layer are positioned specifically to cover first edges and second edges of vertical scan lines, providing localized electromagnetic shielding where needed. This selective shielding approach addresses signal attenuation and interference at critical locations without requiring uniform shielding throughout the entire structure.
Data Source
AI summary
A display device includes a first conductive layer including horizontal scan lines, and island-type electrodes, which are spaced apart from the horizontal scan lines; a first insulating layer disposed on the first conductive layer; a second conductive layer disposed on the first insulating layer, the second conductive layer including data lines, and a plurality of vertical scan lines; a second insulating layer disposed on the second conductive layer; and a third conductive layer disposed on the second insulating layer and including first shield electrodes, which cover first edges of the vertical scan lines, and second shield electrodes, which are spaced apart from the first shield electrodes, and cover second edges of the vertical scan lines, wherein the vertical scan lines are electrically connected to the island-type electrodes via contact holes that extend through the first insulating layer.