OLED Display Panel Touch Electrode Anode Layer Integration
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Solution Overview
Problem
Existing in-cell touch displays for OLED panels require multiple electrode layers when a touch circuit is added, leading to a complex production process and increased production time.
Innovation Solution
An OLED display panel design where the touch electrode and metal anode are prepared in the same layer, reducing the need for additional film production processes and electrode layers, and integrating a touch control circuit with a display control circuit in a driving chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple electrode layers are used to add touch circuit onto OLED film layers, then touch functionality is achieved, but production process complexity increases and production time extends
Solution Approach 1:
The patent merges the touch electrode layer and the anode layer into a single integrated structure. The touch electrode is formed using the same ITO material and deposition process as the anode, eliminating the need for separate electrode layers. This combining approach maintains touch functionality while significantly simplifying the production process and reducing the number of manufacturing steps.
Solution Approach 2:
The anode layer is designed to serve dual functions: as the electrical anode for the OLED light-emitting device and as the touch electrode for the capacitive touch sensor. This multi-functional design allows a single layer to perform both display and touch sensing roles, reducing structural complexity and streamlining production.
2Adaptability or versatility
If multiple electrode layers are used to add touch circuit onto OLED film layers, then touch functionality is achieved, but production time increases
Solution Approach 1:
The touch electrode and anode are combined into a single deposition step using ITO material. This merging eliminates multiple sequential processing steps, directly reducing production time while maintaining both touch sensing and light-emitting functions.
Solution Approach 2:
The touch electrode pattern is designed to be formed simultaneously with the anode pattern during the same ITO deposition and patterning process. This preliminary integration of touch circuit formation into the existing OLED manufacturing flow avoids adding separate processing steps, thereby reducing overall production time.
3Adaptability or versatility
If multiple electrode layers are used in in-cell touch display, then touch circuit functionality is achieved, but panel thickness increases
Solution Approach 1:
The patent combines the touch electrode layer and anode layer into a single ITO layer, eliminating the need for multiple stacked electrode layers. This structural integration directly reduces the overall panel thickness while maintaining full touch circuit functionality through the dual-use of the ITO layer.
Data Source
AI summary
The present invention provides an organic light-emitting diode display panel including a substrate, a thin film transistor arranged on the substrate, a planarization layer arranged on the substrate, a first touch electrode arranged on a surface of the planarization layer, an electrode insulation layer arranged on the surface of the planarization layer, a metal anode arranged on a surface of the electrode insulation layer and electrically connected to the source electrode or the drain electrode of the thin film transistor, and, a second touch electrode arranged on the surface of the electrode insulation layer and electrically connected to the first touch electrode.