Organic Light Emitting Display Touch Panel Insulating Layer
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Solution Overview
Problem
The manufacturing process of capacitive touch panel display apparatuses is complicated due to the need for various operations in the photo lithography process for sealing substrates with touch panel functions, which increases complexity and cost.
Innovation Solution
An organic light emitting display apparatus is designed with a substrate, a display unit, a sealing substrate, and a touch unit featuring a pixel region and a pad region, where the second insulating layer is formed only on the pixel region using an open mask, simplifying the manufacturing process by reducing the need for extensive photolithography operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If various photo lithography operations are performed to manufacture a sealing substrate with touch panel function, then the touch panel function is achieved, but the manufacturing process becomes complicated
Solution Approach 1:
The patent combines the touch panel electrode structure with the display electrode structure by forming both the touch electrode and display electrode as transparent conductive layers on the same sealing substrate. This merging of functions into a single integrated structure eliminates the need for separate manufacturing processes for separate touch and display substrates, thereby reducing manufacturing complexity while maintaining touch panel functionality
Solution Approach 2:
The sealing substrate is designed to serve multiple functions simultaneously: it acts as both the touch panel substrate and the display substrate. The transparent conductive layers on the sealing substrate function as both touch electrodes and display electrodes, making the sealing substrate a multi-functional component that eliminates the need for separate dedicated substrates
2Adaptability or versatility
If various photo lithography operations are performed to manufacture a sealing substrate with touch panel function, then the touch panel function is achieved, but the manufacturing cost increases
Solution Approach 1:
By merging the touch electrode and display electrode formation processes into a single photolithography operation on the sealing substrate, the patent reduces the total number of manufacturing steps. This consolidation directly lowers manufacturing costs by reducing material consumption, process time, and labor requirements associated with multiple separate photolithography operations
3Device complexity
If the second insulating layer is formed only on the pixel region using an open mask, then the manufacturing process is simplified, but the pad region structure becomes different
Solution Approach 1:
The patent applies local quality by forming the second insulating layer selectively only on the pixel region while leaving the pad region without this layer. This selective formation is achieved through photolithography masking techniques that allow different structural characteristics in different regions of the substrate, simplifying the overall manufacturing process while maintaining appropriate structural differentiation for functional requirements
Data Source
AI summary
An organic light emitting display apparatus having a capacitive touch panel function, and a method of manufacturing the same is disclosed. The organic light emitting display apparatus includes a touch unit including a pixel region and a pad region, and an insulating layer formed only on a surface of the pixel region by using an open mask. The organic light emitting display apparatus is manufactured without performing a photolithography process on an insulating layer, thereby improving productivity of the manufacturing process.