Touch-Control OLED Panel Layout for Thin Optical Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OLED display panels face challenges in achieving thin form factors and flexible designs due to the use of polarizers, which reduce reflectivity but increase lifetime burden, and the substitution with color filters leads to issues like thick encapsulation structures and brightness attenuation, as well as interference between touch-control and cathode signals.
Innovation Solution
A touch-control display panel design featuring a reduced encapsulation layer, optical adjusting structure, and protective layers with specific spacing to ensure touch-control performance, including a metal lapping hole and protective layers with non-overlapping projections, ensuring adequate spacing to prevent photoresist residue and short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If polarizers are used to reduce reflectivity, then reflectivity is reduced, but lifetime burden increases and flexibility is compromised
Solution Approach 1:
The patent removes the polarizer from the display structure entirely and replaces it with an optical adjusting structure composed of a black matrix layer and color filter layer. This extraction eliminates the harmful effects of polarizers on lifetime and flexibility while achieving the desired reflectivity reduction through the optical adjusting structure's design
2Reliability
If encapsulation structure thickness is increased to protect display structure layer, then protection is improved, but brightness attenuation increases
Solution Approach 1:
The patent applies different encapsulation thicknesses at different locations: the encapsulation structure is thinner in the display region to minimize brightness attenuation, while being thicker in the peripheral region to provide adequate protection. This local quality differentiation resolves the contradiction between protection and brightness
3Device complexity
If protective layers are placed close to metal lapping hole for compact design, then device complexity is reduced, but photoresist residue and short circuits occur
Solution Approach 1:
The patent introduces a preset distance as an intermediary spatial buffer between the protective layers and the metal lapping hole. This distance acts as a mediator that prevents photoresist residue and short circuits while maintaining overall structural compactness through optimized spacing
4Length of stationary object
If touch-control structure layer is placed closer to display structure layer, then device thickness is reduced, but signal interference between touch-control and cathode increases
Solution Approach 1:
The patent uses the encapsulation structure and optical adjusting structure as intermediary layers between the display structure layer and touch-control structure layer. These intermediaries provide electrical isolation that prevents signal interference while allowing the overall device thickness to remain reduced
Data Source
AI summary
A touch-control display panel and a manufacturing method, and a display device. The touch-control display panel includes a display structure layer, an encapsulating layer and an optical adjusting structure which are sequentially arranged on a substrate. The touch-control display panel further includes: a metal lapping hole disposed on the substrate and located in the bonding region; two protective layers on one side of the optical adjusting structure away from the substrate; and a touch-control structure layer on one side of the two protective layers away from the substrate. The touch-control structure layer includes a touch-control electrode lead, and a part of the touch-control electrode lead covers the metal lapping hole.