Sealant Midline Positioning for Pressure Sensor Detection
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Solution Overview
Problem
Existing display panels suffer from poor pressure detection performance due to unreasonable relative locations of the sealant and pressure sensor, leading to unstable pressure induction detection signals.
Innovation Solution
The display panel design includes a substrate with a display region and a non-display region, where the sealant adheres the substrates such that the distance from the midline of the sealant to the common boundary between the regions is greater than the distance from the pressure sensor's geometric center to this boundary, with the sealant's midline acting as a perpendicular bisector, optimizing the shear force distribution and enhancing pressure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sealant and pressure sensor are positioned with conventional spacing, then the manufacturing process is simple, but the pressure detection performance is poor
Solution Approach 1:
The patent changes the spatial parameter (distance) between the sealant and pressure sensor to optimize pressure detection performance. Specifically, the distance from the sealant's midline to the common boundary is made larger than the distance from the pressure sensor's geometric center to the common boundary, creating an optimized geometric relationship that improves measurement precision without adding device complexity.
2Measurement precision
If the sealant is positioned closer to the boundary, then the pressure sensor can be placed in a more optimal location, but the bonding strength may be compromised
Solution Approach 1:
The patent applies local quality by creating different functional zones within the sealant structure. The sealant's midline is positioned at a specific distance from the common boundary to provide optimal bonding strength in the bonding region, while the pressure sensor is positioned at a different distance to optimize detection performance in the sensing region. This localized optimization of positions resolves the contradiction between bonding strength and detection precision.
3Measurement precision
If the sealant and pressure sensor positions are optimized for detection, then pressure detection performance improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent creates an equipotential geometric relationship where the sealant's midline and the pressure sensor's geometric center are positioned at specific distances from the common boundary. This creates a balanced configuration where the force distribution and bonding characteristics are optimized simultaneously, reducing the sensitivity to manufacturing variations and making the system more robust to positional tolerances.
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 pressure detection performance by ensuring stronger bonding and supporting effects near the sealant's midline, resulting in more accurate and sensitive pressure detection signals.
Implementation Method 1
the first substrate and the second substrate are adhered to each other via a sealant
Data Source
AI summary
Disclosed are a display panel and a display device. The display panel comprises a first substrate comprising a display region and a non-display region; a second substrate opposite to the first substrate; and a pressure sensor located on one side of the first substrate adjacent to the second substrate and located within the non-display region. The first and second substrates are adhered via a sealant, an orthogonal projection of the sealant on the first substrate is located within the non-display region of the first substrate, a distance from a midline of the sealant to a common boundary between the display region and the non-display region is larger than a distance from a geometric center of the pressure sensor to the common boundary between the display region and the non-display region. The midline of the sealant is a perpendicular bisector of a common perpendicular of the two edges of the sealant.