Hollowed Self-Capacitive Touch Electrodes for High Transmittance
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Solution Overview
Problem
Current display technologies face challenges in achieving high screen-to-body ratios due to the need for non-display areas to accommodate light-capturing components like cameras and touch electrodes, which reduce light transmittance and affect photosensitive performance.
Innovation Solution
A display panel design with a first display area having self-capacitive touch electrodes featuring hollowed parts, allowing for increased light transmittance while maintaining touch functionality, and a second display area with mutual capacitive touch electrodes, optimizing touch detection and light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch electrode is disposed in the semi-transparent area to enable touch functionality, then touch interaction capability is improved, but light transmittance is reduced and photosensitive performance of the light-capturing component is affected
Solution Approach 1:
The touch electrode is divided into multiple touch electrode units arranged in an array, with each unit containing a hollowed part. This segmentation allows the touch electrode to maintain electrical connectivity while creating transparent gaps that improve light transmittance to the underlying light-capturing component.
Solution Approach 2:
The hollowed parts are strategically positioned within specific touch electrode units to create localized transparent regions. This allows different areas of the touch electrode to have different properties: the electrode material provides touch sensitivity while the hollowed parts provide light transmission, achieving local optimization of both functions.
2Area of stationary object
If high light transmittance areas are disposed in display areas to accommodate light-capturing components, then screen-to-body ratio is improved, but touch electrode functionality is compromised
Solution Approach 1:
The touch electrode units with hollowed parts serve multiple functions simultaneously: they provide touch sensing capability through the conductive material while also acting as light-transmitting structures for the camera. This multi-functionality allows the same structure to fulfill both touch interaction and optical transmission requirements.
Solution Approach 2:
The solution moves from a two-dimensional planar touch electrode design to a three-dimensional structure with hollowed parts extending vertically. This dimensional change allows the touch electrode to maintain electrical continuity while creating optical pathways for light transmission in the vertical dimension.
3Area of stationary object
If a semi-transparent area is set on the display screen with a camera disposed underneath to achieve full-screen display, then screen-to-body ratio is improved, but light transmittance is reduced affecting photosensitive performance
Solution Approach 1:
The hollowed parts extract or remove portions of the touch electrode material to create dedicated light transmission pathways. By taking out material rather than relying on semi-transparent materials, the design achieves superior light transmission while maintaining the necessary touch electrode functionality.
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 solution enhances light transmittance in the first display area, improving photosensitive performance and simplifying the manufacturing process, while ensuring effective touch functionality in both areas, thus improving the overall display device performance.
Implementation Method 1
the first touch electrode unit includes at least one hollowed part, along a direction perpendicular to the base substrate, the hollowed part runs through the first touch electrode unit
Implementation Method 2
the first touch electrode is a self-capacitive touch electrode
Implementation Method 3
The light-capturing component includes a light-capturing unit. An orthographic projection of the light-capturing unit on the base substrate falls within a range of an orthographic projection of the hollowed part of the first touch electrode unit on the base substrate
Data Source
AI summary
A display panel, a display device and a control method are provided. The display panel includes a display area and a non-display area, a base substrate, and touch electrodes on a side of the base substrate facing a light-exiting surface of the display panel. The display area includes a first display area and a second display area that at least partially surrounds the first display area, the touch electrodes are at least distributed in the display area, the touch electrodes at least include a first touch electrode located in the first display area, the first touch electrode includes at least one first touch electrode unit, and the first touch electrode unit includes at least one hollowed part, along a direction perpendicular to the base substrate, the hollowed part runs through the first touch electrode unit, and the first touch electrode is a self-capacitive touch electrode.