OLED Touch Display with Integrated Transparent Electrodes
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Solution Overview
Problem
Current LCD touch control display devices are thick and costly due to the integration of a touch panel, which causes finger pressure to alter the liquid crystal cell gap and affect display results, whereas OLEDs with their all-solid-state property can simplify this issue.
Innovation Solution
An OLED touch control display device is designed with a top-emitting OLED and a transparent touch panel, where the first electrode layer is reflective and the second is transparent, positioned on a transparent package cover plate, allowing the touch panel to be integrated without influencing the display, reducing thickness and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch panel is integrated with LCD to form an LCD touch control display device, then the device can provide touch control function, but the thickness increases and production cost increases
Solution Approach 1:
The patent merges the touch panel and OLED display into a single integrated structure where the touch panel is formed directly on the OLED display substrate. This eliminates the need for separate touch panel and display components, reducing overall thickness while maintaining touch control functionality. The integration is achieved by forming transparent electrode layers and insulative layers directly on the OLED structure.
Solution Approach 2:
The OLED display substrate serves multiple functions: it acts as both the display element and the base substrate for the touch panel. The transparent electrode layers serve dual purposes as both OLED electrodes and touch panel sensing elements. This multi-functionality reduces the number of components needed and simplifies the overall structure.
2Adaptability or versatility
If a touch panel is integrated with LCD to form an LCD touch control display device, then the device can provide touch control function, but the production cost increases
Solution Approach 1:
The patent combines the manufacturing processes of OLED and touch panel into a single integrated fabrication sequence. The transparent electrode layers and insulative layers are formed during the OLED manufacturing process itself, eliminating the need for separate touch panel fabrication and assembly steps. This integration reduces production complexity and cost.
Solution Approach 2:
The same substrate and electrode layers serve both OLED display and touch panel functions, eliminating the need for separate components and assembly operations. This reduces material costs, manufacturing steps, and assembly complexity, thereby lowering overall production costs.
3Ease of operation
If finger touches LCD display, then touch control operation can be performed, but the cell gap of liquid crystal layer changes and display result is influenced
Solution Approach 1:
The patent changes the fundamental structure from liquid crystal-based display to solid-state OLED display. This parameter change eliminates the liquid crystal layer and its associated cell gap issues. The solid-state OLED structure maintains stable optical properties under finger pressure, ensuring display reliability while preserving touch control functionality.
Solution Approach 2:
The patent uses a composite structure combining OLED emissive layers with transparent conductive and insulative layers to create a unified display-touch interface. This composite structure provides both the display function and touch sensing function while maintaining structural stability under finger pressure, preventing display quality degradation.
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
The solution enables a thinner and more cost-effective OLED touch control display device by utilizing the all-solid-state property of OLEDs to prevent finger touch interference with the display, improving manufacturing efficiency and reducing production costs compared to LCD devices.
Implementation Method 1
The OLED possesses many outstanding properties of self-illumination, low driving voltage, high luminescence efficiency
Implementation Method 2
the first electrode layer is a reflective electrode, and the second electrode layer is a transparent electrode
Data Source
AI summary
The present invention provides an OLED touch control display device and a manufacture method thereof, comprising: an OLED display (1) and a transparent touch panel (2); the OLED display (1) comprises: a substrate (11), a transparent package cover plate (12), first electrode layers (13), an organic emitting light layer (14) and a second electrode layer (15); the first electrode layer (13) is a reflective electrode, and the second electrode layer (15) is a transparent electrode; the transparent touch panel (2) is located at a side of the transparent package cover plate (12) of the OLED display (1) backing to the substrate (11). The OLED touch control display device can allow the top emitting OLED to possess touch control function to prevent the influence of the finger touch to the display result, and to diminish the thickness of the touch control display device and reduce the production cost.