Reflective Metal Layer Touch Electrodes in Display Panels
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Solution Overview
Problem
Light-emitting diode display panels with integrated touch functions face complexity in preparation and increased thickness due to the separate manufacturing and bonding of touch substrates on the light-outgoing side of the display substrate.
Innovation Solution
A display panel design where a light-emitting substrate and a color filter substrate are oppositely disposed, with a reflective metal layer forming touch electrodes by etching into baffle wall structures, allowing for independent transmission of touch signals without the need for a separate touch substrate, thereby simplifying the preparation process and reducing panel thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate touch substrate is manufactured and bonded on the light-outgoing side of the display substrate, then the display panel achieves integrated touch function, but the preparation process becomes complex and the panel thickness increases
Solution Approach 1:
The patent merges the touch electrode function with the reflective metal layer in the color filter substrate. The reflective metal layer is patterned to form both the reflective structures and the touch electrodes (first and second metal subsections), eliminating the need for a separate touch substrate and simplifying the overall structure while maintaining integrated touch functionality
Solution Approach 2:
The reflective metal layer serves multiple functions: it provides light reflection, forms touch electrodes for signal transmission, and acts as a structural component. This multi-functionality reduces the number of separate components needed and simplifies the preparation process while achieving integrated touch function
2Adaptability or versatility
If a separate touch substrate is manufactured and bonded on the light-outgoing side of the display substrate, then the display panel achieves integrated touch function, but the panel thickness increases
Solution Approach 1:
The touch electrode function is merged into the reflective metal layer of the color filter substrate. By forming both reflective structures and touch electrodes within the same layer, the patent eliminates the need for an additional touch substrate, thereby reducing the overall panel thickness while maintaining integrated touch functionality
Solution Approach 2:
The patent utilizes the planar dimension of the reflective metal layer to incorporate touch electrode patterns. By arranging first and second metal subsections in specific patterns within the same layer, touch functionality is achieved without adding thickness in the vertical dimension
3Device complexity
If the reflective metal layer is etched to form touch electrodes, then the preparation process is simplified and panel thickness is reduced, but light crosstalk may occur between adjacent light-emitting units
Solution Approach 1:
The reflective metal layer is segmented into isolated first and second metal subsections that serve as touch electrodes. These segmented structures are positioned to prevent light crosstalk between adjacent light-emitting units while maintaining touch functionality, thus resolving the conflict between simplification and light isolation
4Adaptability or versatility
If adjacent metal subsections are independently disposed, then touch signal transmission is improved, but manufacturing precision requirements increase
Solution Approach 1:
The metal subsections serve dual functions as both reflective structures and touch electrodes. This universality allows for standardized patterning processes that can achieve both independent disposal for touch signal transmission and controlled positioning to meet manufacturing precision requirements
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
This configuration simplifies the preparation process and reduces the thickness of the display panel by integrating touch electrodes directly into the reflective metal layer, enhancing light-emitting efficiency and preventing light crosstalk.
Implementation Method 1
a reflective metal layer, where the reflective metal layer at least comprises a first reflective subsection
Implementation Method 2
adjacent ones of the plurality of first metal subsections along a second direction are electrically connected through at least one first electrode subsection
Data Source
AI summary
Provided are a display panel, a preparation method thereof and a display device. The display panel includes a light-emitting substrate and a color filter substrate; the color filter substrate includes: a substrate, a baffle wall layer and a reflective metal layer. The baffle wall layer is located on one side of the substrate and includes multiple baffle wall structures; the reflective metal layer includes a first reflective subsection covering a surface on a side, close to the light-emitting substrate, of the multiple baffle wall structures; the first reflective subsection includes multiple first metal subsections and multiple second metal subsections; and the multiple first metal subsections are independently disposed, and adjacent ones of the multiple second metal subsections along the first direction are connected to each other.