Segmented Display Areas for Touch Sensing Around Optical Devices
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Solution Overview
Problem
Display devices with optical sensors integrated face challenges in maintaining high touch sensitivity due to the presence of optical devices overlapping with display areas, leading to reduced sensitivity in these regions.
Innovation Solution
The display device incorporates a first display area with higher pixel density and auxiliary electrodes that connect driving and sensing electrodes, along with a second display area with lower pixel density and sub-driving and sub-sensing electrodes, ensuring optimal touch sensitivity while accommodating optical devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical devices are integrated and disposed to overlap with display areas, then device functionality is enhanced, but touch sensitivity is reduced in the overlapping regions
Solution Approach 1:
The patent applies different electrode configurations to different display regions. The first display area (without optical devices) uses a first electrode pattern, while the second display area (with optical devices) uses a second electrode pattern. This local differentiation allows each region to be optimized for its specific function, maintaining touch sensitivity in the optical device region while preserving display quality in the non-optical region.
Solution Approach 2:
The display area is segmented into at least two distinct regions: a first display area without optical devices and a second display area with optical devices. This segmentation allows independent optimization of electrode patterns for each region, enabling the optical devices to function properly while maintaining touch sensitivity in the overlapping area through the specially designed second electrode pattern.
2Area of stationary object
If holes are removed from the front of the display device to widen the display area, then display area is increased, but optical devices must be disposed to overlap with the display panel
Solution Approach 1:
The patent resolves the conflict between display area and optical device integration by transitioning to a different dimensional arrangement. Instead of placing optical devices in the non-display area (traditional approach), the patent integrates them within the display area by using a transparent or translucent electrode pattern in the second display area, allowing optical devices to be positioned behind the display panel in the overlapping region.
3Manufacturing precision
If pixel density is increased in the first display area, then display quality is improved, but the complexity of electrode configuration increases
Solution Approach 1:
The patent employs different pixel densities in different display areas to balance display quality and device complexity. The first display area uses a first pixel density optimized for high display quality, while the second display area uses a second pixel density that accommodates optical device integration. This local differentiation reduces overall device complexity compared to using high pixel density throughout the entire display.
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
Enhances touch sensitivity in regions with optical sensors by optimizing electrode configurations, allowing for improved user interaction without compromising the functionality of integrated optical devices.
Implementation Method 1
The touch sensing unit includes a plurality of touch electrodes that are driven in a capacitive manner, and can thus detect the touch from the user
Implementation Method 2
Auxiliary electrodes are between the first and second display areas... the driving electrodes, the first auxiliary electrode, and the sub-driving electrodes may be electrically connected, and the sensing electrodes, the second auxiliary electrode, and the sub-sensing electrodes may be electrically connected
Data Source
AI summary
A display device includes a first display area including first pixels, driving electrodes, and sensing electrodes. A second display area includes second pixels, sub-driving electrodes, and sub-sensing electrodes. Auxiliary electrodes are between the first and second display areas. A number of first pixels per unit area of the first display area is greater than a number of second pixels per unit area of the second display area.