Pixel-Density Segmented Display Panel for Optical Sensor Integration
Find Innovative SolutionsGenerate Solutions
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 the display panel, which can interfere with touch detection.
Innovation Solution
The display device is designed with a first display area having a higher pixel density than a second display area, featuring auxiliary electrodes that connect driving and sensing electrodes, and includes optical devices overlapping only with the second display area, allowing for enhanced touch sensitivity in regions with optical sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If optical devices are disposed to overlap with the display panel to widen the display area, then the display area is increased, but touch sensitivity deteriorates in the overlapping region
Solution Approach 1:
The display panel is divided into a first display area with higher pixel density and a second display area with lower pixel density. The optical devices are disposed to overlap only with the second display area, separating the optical device placement from the high-sensitivity touch region. This segmentation allows the first display area to maintain high touch sensitivity while the second display area accommodates the optical devices.
Solution Approach 2:
Different regions of the display panel are assigned different pixel densities and functions. The first display area has higher pixel density for optimal touch sensitivity and display quality, while the second display area has lower pixel density to accommodate optical devices. This local differentiation allows each region to optimize its specific function without compromising the other.
2Area of stationary object
If holes are removed from the front of the display device to widen the display area, then the display area is increased, but optical devices may interfere with touch detection
Solution Approach 1:
The display panel is segmented into two distinct display areas with different characteristics. The first display area maintains full functionality for both display and touch detection, while the second display area is designed to accommodate optical devices with reduced pixel density, minimizing interference with touch detection in the first display area.
Solution Approach 2:
The second display area acts as an intermediary zone that houses the optical devices while maintaining sufficient touch detection capability. This intermediate region allows optical devices to be integrated without directly interfering with the primary touch-sensitive first display area, as the optical devices are positioned in the lower-density second display area.
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 enhances touch sensitivity while accommodating optical sensors, ensuring effective touch detection and image display without interference.
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.
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.