Integrated Touch Sensor on Encapsulation Layer
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Solution Overview
Problem
The existing organic light emitting display devices with touch sensors face complexities and increased costs due to separate production and attachment processes, which complicate the overall manufacturing process and require additional joining steps for the touchscreen and display components.
Innovation Solution
An organic light emitting display device with a touch sensor is designed where the touch sensor and color filter are integrated directly on the encapsulation layer, eliminating the need for an additional adhesion process and simplifying the manufacturing by forming touch electrodes and bridges on the encapsulation layer during display production, thereby reducing costs and process complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the touchscreen is separately produced and attached to the front surface of the display panel through an adhesive agent, then the touch sensor can be independently manufactured and assembled, but the overall manufacturing process becomes complicated and costs increase due to additional attachment processes
Solution Approach 1:
The touch sensor and display panel are merged into a single integrated structure where the touch sensor is formed directly on the front surface of the display panel during the same manufacturing process. This eliminates the need for separate production and attachment processes, resolving the contradiction between independent manufacturability and overall process complexity.
Solution Approach 2:
The front surface of the display panel serves dual functions: as the display surface and as the substrate for the touch sensor. This multi-functionality approach allows the same structure to fulfill both display and touch sensing roles, eliminating the need for separate components and attachment processes.
2Ease of manufacture
If the touchscreen is separately produced and attached to the front surface of the display panel, then modular assembly is enabled, but costs increase due to additional attachment processes
Solution Approach 1:
By combining the touch sensor formation with the display panel manufacturing into a single integrated process, the patent eliminates the need for additional attachment materials and processes, thereby reducing manufacturing costs while maintaining ease of manufacture.
3Ease of repair
If a separate touchscreen is attached to the display panel, then replacement and repair are simplified, but the overall device complexity and manufacturing cost increase
Solution Approach 1:
The integration of the touch sensor with the display panel creates a unified structure that, while more complex at the manufacturing level, simplifies the overall device structure by eliminating separate components and attachment interfaces, thereby potentially simplifying repair processes.
Data Source
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AI summary
Disclosed is a display device comprising: a light-emitting device (120) disposed on a substrate (111); an encapsulation layer (140) disposed on the light-emitting device (120); a plurality of first touch electrodes (152e) arranged in a first direction; a plurality of second touch electrodes (154e) arranged in a second direction, which intersects the first direction; first bridges (152b) configured to interconnect the first touch electrodes (152e); second bridges (154b) configured to interconnect the second touch electrodes (154e); and a routing line (156) connected to the first and second touch electrodes (152e, 154e) and disposed along a lateral surface of the encapsulation layer (140), wherein at least one of the first and second bridges (152b, 154b) has a slit (151) formed therein.