Touch Panel Electrode Same-Side Layout for Chromatic Aberration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Capacitive touch panels suffer from chromatic aberration and visibility issues due to light refraction and the thickness caused by the opposing disposition of electrode layers and additional planarizing layers, which affect the aesthetic and functional thinness of the display.
Innovation Solution
The vertical and horizontal electrode layers are disposed on the same side of the planarizing layer, eliminating the need for an additional planarizing layer and reducing thickness, while a dummy bar ensures no short circuit, and a shielded layer minimizes electronic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the vertical electrode layer and horizontal electrode layer are disposed oppositely to the second PLN layer, then the touch panel structure is conventional and easy to manufacture, but chromatic aberration occurs due to light refraction and the touch panel thickness increases
Solution Approach 1:
The patent inverts the conventional arrangement by disposing both vertical and horizontal electrode layers on the same side of the PLN layer instead of oppositely. This inversion eliminates the light refraction path through multiple layers, thereby resolving chromatic aberration while maintaining manufacturability
Solution Approach 2:
The patent merges the vertical and horizontal electrode layers onto the same side of the PLN layer, consolidating their positions. This merging eliminates the need for one PLN layer and reduces overall thickness while preventing chromatic aberration
2Shape
If the gap between vertical electrode layer and horizontal electrode layer is reduced to avoid user glimpse, then the appearance is improved, but the risk of short-circuit increases
Solution Approach 1:
The patent introduces a dummy bar as an intermediary element positioned between the vertical and horizontal electrode layers. This dummy bar maintains an appropriate gap distance to prevent short-circuits while being visually imperceptible, thus preserving both appearance and reliability
3Shape
If the third PLN layer is added to planarize the touch panel, then the planarity is improved, but the touch panel thickness increases and explicit thin shape is compromised
Solution Approach 1:
The patent extracts and eliminates the unnecessary third PLN layer from the conventional structure. By removing this redundant planarizing layer, the touch panel achieves both adequate planarity and reduced thickness, accomplishing the explicit thin shape goal
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 resolves chromatic aberration and visibility issues, achieving a thinner touch panel with improved aesthetics and functionality by aligning electrode layers and using a dummy bar to prevent short circuits and electronic interference.
Implementation Method 1
a shielded layer (190) disposed on the third PLN layer (19) to reduced VCOM voltage electrical interference with the vertical electrode layer (7) and the horizontal electrode layer (9)
Implementation Method 2
the chromatic aberration caused by refraction of the second PLN layer (18) results in asymmetrical color-balance effect of the touch panel
Data Source
AI summary
The present invention relates to an image display system with a touch panel sensing device, which applied in an electronic device, the touch panel sensing device including a substrate, a black matrix, a first planarizing layer, a conductive metal, vertical and horizontal electrode layers, a second planarization (PLN) layer, and a color resist layer disposed from top to bottom, wherein the vertical and horizontal electrode layers disposed between the first planarizing layer and the second PLN layer; therefore, by placing two perpendicularly electrode layers with the first planarizing layer on the same side, effectively to avoid chromatic aberration and reduce the thickness of the touch panel.