Display Shielding-Electrode Layout for Input-Sensing Accuracy
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Solution Overview
Problem
Display devices with integrated input sensing units face noise interference from circuit elements, particularly from power supply electrodes and driving circuits, which affect the accuracy and reliability of input sensing operations.
Innovation Solution
The display device incorporates a shielding electrode connected to the power supply electrode, overlapping and covering circuit elements to block noise, and a connection electrode with through-holes that overlap the shielding electrode, ensuring the input sensing layer is isolated from noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the input sensing layer is integrated with the display device, then the input sensing function is added to the display device, but noise interference from circuit elements and power supply electrodes affects the accuracy of input sensing operations
Solution Approach 1:
A shielding electrode is introduced as an intermediary component between the noise-generating circuit elements and the input sensing layer. This shielding electrode acts as a mediator that blocks electromagnetic noise from reaching the sensing layer, thereby protecting the input sensing accuracy while maintaining the integrated structure
2Measurement precision
If the shielding electrode is added to block noise, then the input sensing accuracy is improved, but the device structure becomes more complex
Solution Approach 1:
The shielding electrode is merged with existing conductive layers in the display device structure. By integrating the shielding function into the existing layered architecture rather than adding completely separate components, the noise protection is achieved while minimizing the increase in structural complexity
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 shielding electrode effectively reduces noise interference, enhancing the accuracy and reliability of input sensing operations by isolating the input sensing unit from noise generated by the power supply and driving circuits.
Implementation Method 1
a shielding electrode connected to the power supply electrode and overlapping at least some of the circuit elements
Data Source
AI summary
A display device includes: a base layer including a display area (DA) and a non-DA; a circuit element layer on the base layer and including: a power supply electrode (PSE) overlapping the non-DA, circuit elements, and a shielding electrode connected to the PSE and overlapping some of the circuit elements; a display element layer on the circuit element layer and including: a light emitting element including a first electrode, a light emitting unit, and a second electrode, and a connection electrode connecting the second electrode to the PSE and including first through-holes; a thin film encapsulation layer (TFEL) on the display element layer and including an organic layer overlapping the DA; and an input sensing layer on the TFEL and including sensing electrodes and sensing signal lines connected to the sensing electrodes. The sensing signal lines overlap the connection electrode. Some of the first through-holes overlap the shielding electrode.