Organic Light Emitting Display Touch Electrode Layer Integration
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Solution Overview
Problem
Existing organic light emitting display devices face challenges in minimizing thickness due to the requirement of multiple layers for touch electrodes, which also leads to slower signal transmission across large display sizes, affecting touch point calculation speed and device thinness.
Innovation Solution
The implementation of a touch sensing method and organic light emitting display device design featuring interconnected driving and sensing electrodes, where driving signals are efficiently transmitted through a touch driver integrated circuit, reducing the number of channels needed and allowing for quicker touch point calculation, with electrodes formed in a single layer to minimize thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple layers are used to form touch electrodes, then the touch sensing function is achieved, but the device thickness increases
Solution Approach 1:
The patent merges the touch electrode layer with the display device structure by forming touch electrodes in the same layer as the display electrode, eliminating the need for separate touch electrode layers. This integration allows the touch sensing function to be achieved without increasing device thickness, as the touch electrodes share the same structural plane as the display electrodes.
Solution Approach 2:
The display electrode layer is designed to serve dual functions: both display signal transmission and touch sensing. By making the display electrode act as both the display electrode and the touch electrode, the patent eliminates redundant layers, achieving multi-functionality in a single layer and thereby reducing overall device thickness while maintaining touch sensing capability.
2Area of stationary object
If multiple channels are used for signal transmission, then the touch sensing coverage is improved, but the signal transmission speed decreases
Solution Approach 1:
The patent combines multiple electrode functions into fewer channels by making display electrodes serve as touch electrodes. This merging reduces the number of separate signal transmission channels needed, thereby decreasing signal transmission distance and improving transmission speed while maintaining comprehensive touch sensing coverage through the integrated electrode structure.
3Reliability
If a separate touch panel is disposed on the display device, then the touch sensing function is achieved, but the device becomes thicker and heavier
Solution Approach 1:
The patent merges the touch sensing function with the display device structure by integrating touch electrodes into the display electrode layer. This eliminates the need for a separate touch panel component, thereby reducing both the weight and thickness of the device while maintaining full touch sensing functionality through the integrated electrode system.
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
This approach enables a thinner organic light emitting display device with faster touch point calculation by reducing the complexity of signal transmission and layer formation, addressing the limitations of existing technologies in both thickness and speed.
Implementation Method 1
a touch sensing unit on the display unit, the touch sensing unit including an encapsulation substrate and a capacitive pattern layer on a side of the encapsulation substrate facing the display unit
Data Source
Figure 1~2
Figure 3
Figure 4~5B
AI summary
Disclosed is an organic light emitting display device and a touch sensing method for the same. The organic light emitting display device includes a first driving electrode disposed on a portion of a first area of a display device, a second driving electrode disposed on a portion of a second area of the display device and connected to the first driving electrode, a first sensing electrode disposed on another portion of the first area and configured to correspond to the first driving electrode, and a second sensing electrode disposed on another portion of the second area and configured to correspond to the second driving electrode. An organic light emitting display device in which a thinner thickness is implemented and calculation of a touch point is performed more quickly by effectively transmitting a driving signal and a touch sensing method for the same is provided.