Multi-Level Pressure Detection in Display Panels via Segmented Electrode Gaps
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Solution Overview
Problem
Existing display panels with sensor capabilities cannot detect pressing pressure in multiple levels, as they either rely on a given threshold for direct contact detection or are limited by height differences in color filters, resulting in only two levels of pressing pressure resolution.
Innovation Solution
A display panel design featuring sensor sections with varying electrode-to-electrode gap lengths between substrates, allowing electrodes to come into contact based on pressure-induced deformation, enabling detection of multiple levels of pressing pressure through different gap lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct contact detection method is used, then position detection is achieved, but pressing pressure can only be detected using a given threshold (two levels only)
Solution Approach 1:
The sensor sections are divided into multiple regions with different electrode-to-electrode gap lengths. Each gap length corresponds to a different pressing pressure threshold, enabling multi-level pressure detection. This segmentation transforms a single binary sensor into multiple pressure-sensitive zones within the same sensor structure.
Solution Approach 2:
Different regions of the sensor section have different electrode gap lengths tailored to detect specific pressure levels. The local gap length varies according to the desired pressure sensitivity, allowing each region to respond to different pressing forces while maintaining a unified sensor structure.
2Manufacturing precision
If color filter height differences are used to form gaps, then electrode gaps are created, but height differences are determined by optical specification making intended height differences impossible to achieve
Solution Approach 1:
The sensor sections are segmented into multiple regions, each with independently controlled electrode gap lengths. This segmentation allows precise control of gap lengths in different regions without being constrained by uniform color filter specifications, enabling tailored pressure detection thresholds.
Solution Approach 2:
The electrode gap length parameter is varied across different sensor sections to achieve different pressure sensitivity levels. By changing this geometric parameter independently of optical specifications, the invention enables precise control over pressing pressure detection thresholds.
3Productivity
If columns are shared by color filters with largest cell thickness, then only two levels of pressing pressure resolution can be formed
Solution Approach 1:
The sensor sections are segmented into multiple independent regions with different electrode gap lengths, enabling detection of multiple pressing pressure levels beyond just two. Each segment can be independently configured to detect specific pressure thresholds.
Solution Approach 2:
The invention introduces a new dimension of control by varying electrode gap lengths in the vertical dimension between electrodes, rather than relying solely on horizontal color filter height differences. This dimensional change enables more pressure levels to be detected.
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
Enables the detection of pressing pressure in multiple levels, enhancing the functionality of touch panels by allowing for varied input pressures, such as in writing applications, and preventing excessive pressure on the panel.
Implementation Method 1
The electrode-to-electrode gap is removed as a result of the deformation of the first substrate section under pressure
Implementation Method 2
The sensor sections are provided between the first and second substrate sections with one of a plurality of electrode-to-electrode gap lengths respectively
Data Source
AI summary
A display panel includes a first substrate section formed on the front side of the display panel, a second substrate section which is opposed to the first substrate section, a plurality of pixel sections formed in a matrix form between the first and second substrate sections, and a plurality of sensor sections, each of the sensor sections having two electrodes, one electrode disposed with a electrode-to-electrode gap from the other between the first and second substrate sections, the electrode-to-electrode gap being removed as a result of the deformation of the first substrate section under pressure so that the one electrode is brought into contact with the other electrode, the sensor sections being provided between the first and second substrate sections with one of a plurality of electrode-to-electrode gap lengths respectively.