Touch Display Mesh and Dummy Electrodes for Seamless Splicing
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Solution Overview
Problem
Spliced display devices suffer from discontinuity in the overall display image due to joint seams, which affect viewing quality, and the arrangement of circuits for driving light-emitting elements increases thickness and complicates manufacturing.
Innovation Solution
A touch display apparatus with first and second dummy electrodes electrically connected to light-emitting elements in auxiliary display areas, used to drive these elements and eliminate seams without adding extra film layers, thereby reducing thickness and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-emitting elements are provided on the auxiliary display area to eliminate joints in spliced display devices, then the viewing quality is improved, but the overall thickness increases and the manufacturing process becomes complicated
Solution Approach 1:
The patent merges the driving circuit functions into the existing conductive layers of the display panel. Specifically, the first conductive layer containing mesh-shaped touch electrodes and dummy electrodes is used to drive both the main display area and the auxiliary display area with light-emitting elements. This integration eliminates the need for separate circuit boards or additional film layers, thereby reducing overall thickness while maintaining the ability to eliminate joint seams in spliced displays.
Solution Approach 2:
The conductive layers in the display panel are designed to serve multiple functions: they act as touch electrodes for user interaction, as dummy electrodes for display uniformity, and as driving circuits for the light-emitting elements in the auxiliary display area. This multi-functionality allows the same structural layers to control multiple display regions without requiring additional dedicated circuit layers, thus avoiding increased thickness and manufacturing complexity.
2Manufacturing precision
If light-emitting elements are provided on the auxiliary display area to eliminate joints in spliced display devices, then the viewing quality is improved, but the manufacturing process becomes complicated
Solution Approach 1:
The patent combines the driving circuit functionality with the existing touch electrode and dummy electrode structures in the conductive layers. By using the same first conductive layer to provide both touch sensitivity and driving signals for light-emitting elements, the invention eliminates the need for separate circuit fabrication processes. This merging approach simplifies the manufacturing process while enabling the auxiliary display area to eliminate joint seams in spliced configurations.
Solution Approach 2:
The conductive layers are designed with universal functionality to serve as touch electrodes, dummy electrodes, and driving circuits simultaneously. This multi-functionality allows a single manufacturing process to produce layers that perform multiple roles, avoiding the need for additional specialized manufacturing steps for separate driving circuits, thereby simplifying production while achieving seamless spliced display quality.
3Ease of operation
If dummy electrodes are structurally separated from touch electrodes, then the touch sensitivity is maintained, but the circuit complexity increases
Solution Approach 1:
The patent merges dummy electrodes and touch electrodes into the same first conductive layer, forming an integrated structure rather than separate layers. This integration maintains touch sensitivity because the mesh-shaped touch electrodes remain functional, while the dummy electrodes are strategically positioned between them. The unified structure reduces circuit complexity by eliminating the need for separate fabrication processes and interconnections between distinct dummy electrode and touch electrode layers.
Data Source
AI summary
A touch display apparatus includes a display panel, first light-emitting elements and a first conductive layer. The first light-emitting elements are disposed on a first auxiliary display area of the display panel. The first conductive layer is disposed on the display panel and includes first mesh-shaped touch electrodes and first dummy electrodes. Each of the first dummy electrodes is disposed between two adjacent first mesh-shaped touch electrodes and is structurally separated from the two adjacent first mesh-shaped touch control electrodes. At least one portion of the first dummy electrode is electrically connected to at least one of the first light-emitting elements disposed in the first auxiliary display area.