Touch Sensitive Keyboard With Pressure Sensing
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Solution Overview
Problem
Traditional touch panels lack pressure sensing functionality, leading to incorrect inputs due to soft touches and the absence of a rebound stroke, increasing user burden and error rates in notebook computer systems.
Innovation Solution
A touch sensitive keyboard system with multiple parallel electrodes and an elastic dielectric layer, coupled with a processing apparatus that drives and senses electrode signals to calculate object positions and determine key presses, reducing incorrect inputs by sensing appropriate pressures and distinguishing between key and touch areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional keyboard with mechanical keys is used, then the user can feel the compression stroke and rebound, but the thickness of the keyboard becomes relatively thick
Solution Approach 1:
The patent replaces the traditional mechanical key compression system with an electronic pressure sensing system. The touch panel incorporates pressure-sensitive sensors that detect the force applied to each key area, eliminating the need for thick mechanical key structures while maintaining tactile feedback capability through electronic detection of pressing depth and force.
Solution Approach 2:
The patent changes the detection parameter from mechanical displacement (key travel distance) to pressure sensing. By measuring the pressure applied to each key area through sensitive sensors integrated into the touch panel, the system can detect key presses with much thinner construction, as pressure detection requires minimal deformation compared to mechanical key travel.
2Length of stationary object
If a larger touch panel is used as a keyboard, then the device can be thinner, but the touch panel lacks pressure sensing function and receives wrong touches
Solution Approach 1:
The patent divides the touch panel into distinct key areas, each equipped with dedicated pressure sensing capability. By localizing pressure detection to specific key regions rather than treating the entire touch panel as a uniform surface, the system can accurately distinguish between intentional key presses and accidental touches, improving input reliability while maintaining the thin profile of the touch panel.
Solution Approach 2:
The patent replaces the absence of pressure sensing in conventional touch panels with integrated pressure-sensitive detection layers. This allows the thin touch panel to detect the force applied at each key area, enabling it to differentiate between deliberate key presses and unintended touches, thereby achieving both thinness and input accuracy.
3Length of stationary object
If a touch panel without pressure sensing is used, then the device can be thinner, but the user must closely observe the response to avoid wrong inputs, increasing user burden
Solution Approach 1:
The patent implements immediate pressure-based feedback at each key area, allowing the system to automatically determine whether a touch was intentional or accidental. The pressure sensing provides real-time information about the force applied, enabling the system to confirm valid key presses and reject erroneous inputs without requiring the user to visually verify the response, thus reducing user burden while maintaining a thin design.
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 system provides accurate key signal output, reduces incorrect inputs, and enhances user experience by incorporating pressure sensing and key press detection, making it easier to use without the need for observing response correctness.
Implementation Method 1
an elastic dielectric layer between the second and third electrodes
Data Source
AI summary
A touch sensitive keyboard system, provided by the present invention, includes a touch sensitive input device and a touch sensitive processing apparatus coupled to the touch sensitive input device. The touch sensitive input device includes parallel first electrodes, parallel second electrodes, parallel third electrodes and an elastic dielectric layer between the second and third electrodes. There is at least one approximation intersection area of one of the first electrodes and one of the second electrodes and at least one pressing intersection area of one of the second electrodes and one of the third electrodes inside each key area. In case the touch sensitive processing apparatus determines there is an external object influencing signals of the approximation and pressing intersection areas of one of the key areas, a key sign is transmitted to a host.