Display Input Sensor Peripheral Electrode Sensitivity
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Solution Overview
Problem
Current display apparatuses with input sensors face challenges in achieving improved sensitivity, particularly in the peripheral areas, which affects the accuracy and effectiveness of input detection.
Innovation Solution
The display apparatus incorporates an input sensor with a specific electrode configuration, including center and peripheral electrodes, sensing patterns, and signal lines, where the peripheral electrodes have reduced surface area and modified shapes to enhance sensitivity, and the use of dummy patterns and signal line arrangements to optimize sensitivity in non-active areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the input sensor uses uniform electrode configuration across the entire active area, then the manufacturing is simple, but the sensitivity in peripheral areas is insufficient
Solution Approach 1:
The patent applies local quality by differentiating the electrode configuration between central and peripheral areas. Center electrodes are provided in the central area with full sensing patterns and floating patterns, while peripheral electrodes in the peripheral area are provided with only sensing patterns. This localized differentiation optimizes sensitivity in each region without unnecessarily complicating the overall structure.
Solution Approach 2:
The active area is segmented into a central area and a peripheral area, with different electrode configurations applied to each segment. This segmentation allows the patent to address the sensitivity issue in peripheral areas specifically, rather than applying a uniform configuration that would compromise either simplicity or peripheral sensitivity.
2Measurement precision
If the peripheral electrodes have the same surface area as center electrodes, then the manufacturing is easier, but the sensitivity in peripheral areas remains low
Solution Approach 1:
The patent implements local quality by giving peripheral electrodes a different configuration than center electrodes. Specifically, peripheral electrodes include only sensing patterns while center electrodes include both sensing patterns and floating patterns. This local differentiation enhances peripheral sensitivity while maintaining manufacturing feasibility through a systematic design approach.
3Area of stationary object
If the input sensor covers the entire display area including non-display area, then the input detection coverage is maximized, but the sensitivity in non-active areas is reduced
Solution Approach 1:
The patent applies local quality by extending sensing patterns into the non-active area specifically in peripheral electrodes. While center electrodes are confined to the active area with both sensing and floating patterns, peripheral electrodes include sensing patterns that extend into the non-active area, thereby maintaining sensitivity in regions where input detection is needed but the display is not active.
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 configuration improves the sensitivity of the input sensor, particularly in peripheral areas, leading to enhanced accuracy and effectiveness in detecting input points, thereby improving the overall performance of the display apparatus.
Implementation Method 1
an input sensor disposed on the display panel and having an active area, which has a plurality of electrodes disposed therein
Data Source
AI summary
A display apparatus including a display panel, an input sensor having an active area having a plurality of electrodes disposed therein and at least a portion of which overlaps the display area, and a non-active area which overlaps the non-display area. The active area has a central area and a peripheral area disposed outward from the central area. The plurality of electrodes include center electrodes which are disposed in the central area and peripheral electrodes which are disposed in the peripheral area and have a surface area less than that of the center electrodes. Each of the center electrodes includes a sensing pattern and a floating pattern, and each of the peripheral electrodes includes substantially only the sensing pattern. Thus, an embodiment of the inventive concept may provide the display apparatus that includes an input sensor having improved sensitivity in a peripheral area.