Notch Display Panel Pressure Sensor Strain Angle Optimization
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Solution Overview
Problem
Conventional touch screens with notches suffer from poor pressure sensor performance when a user performs a pressure touch operation at the center of a protrusion region, due to the altered angle between the major axis direction of strain and the short edge, which reduces the effectiveness of pressure signal detection.
Innovation Solution
A display panel design with a notch featuring a protrusion structure, where the pressure sensor's strain detection directions are optimized by adjusting the included angles between the sensor's detection directions and the display panel's edges to improve pressure signal detection intensity, specifically configuring the angles between the first strain detection direction and the first edge to be greater than or equal to 65 degrees and less than or equal to 115 degrees, and between the second strain detection direction and the first edge to be greater than or equal to −25 degrees and less than or equal to 0 degrees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a notch with protrusion structure is added to the display panel, then the adaptability of the display panel to different touch operations is improved, but the pressure signal detection intensity of the pressure sensor deteriorates
Solution Approach 1:
The patent applies local quality by configuring pressure sensors with different strain detection direction arrangements in different regions. Specifically, pressure sensors in the protrusion structure region have their strain detection directions oriented at specific angles (first strain detection direction at 65-115 degrees, second strain detection direction at -25 to 0 degrees relative to the first edge), while pressure sensors in other regions may have different orientations. This localized optimization ensures that each pressure sensor is optimally positioned to detect pressure signals in its specific region, thereby maintaining high detection intensity across the entire display panel including the protrusion structure area.
2Manufacturing precision
If the strain detection directions of the pressure sensor are fixed in conventional orientations, then the manufacturing precision is improved, but the pressure signal detection intensity in the protrusion region deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the orientation angles of the strain detection directions of the pressure sensors. Instead of using conventional fixed orientations, the patent specifies that the first strain detection direction should be oriented at 65-115 degrees and the second strain detection direction at -25 to 0 degrees relative to the first edge of the display panel. This parameter optimization ensures that the strain detection directions are aligned with the major axis direction of strain in the protrusion structure region, thereby maximizing the pressure signal detection intensity while maintaining manufacturing precision through well-defined angular specifications.
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 the pressure signal detection intensity of the pressure sensor, enabling it to effectively detect pressure touch operations by aligning the major axis direction of strain with the sensor's detection directions, thereby improving the overall sensitivity and accuracy of pressure touch detection.
Implementation Method 1
The at least one first pressure sensor includes a first strain detection direction and a second strain detection direction
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes at least one notch which includes a protrusion structure. A non-display region includes at least one first non-display region arranged along edges of the protrusion structure. At least one first pressure sensor is provided in the first non-display region. An included angle between a first strain detection direction of the first pressure sensor and a first edge of the display panel is greater than or equal to 65 degrees and less than or equal to 115 degrees. An included angle between a second strain detection direction and the first edge of the display panel is greater than or equal to −25 degrees and less than or equal to 0 degree. A control chip is provided in the non-display region, and the first edge is an edge of the display panel close to the control chip.