Ultrasonic Press Sensing Assembly for Reliable Side-Edge Input
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Solution Overview
Problem
Current terminal devices with mechanical keys on the side edge are inconvenient and prone to accidental touches, failing to meet complex operation requirements, especially in scenarios like gaming that require horizontal screen display and operation.
Innovation Solution
A press sensing assembly using ultrasonic technology, comprising an emitting element, a receiving element, and a reflecting pad, where the pad deforms upon pressing, changing medium density and allowing for reliable press detection by intensity changes in the reflected ultrasonic wave.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical keys are arranged on the side edge of the terminal device, then operation functions can be provided, but the operation is inconvenient and not reliable, leading to poor user experience
Solution Approach 1:
The patent replaces mechanical keys with an ultrasonic sensing system consisting of emitting elements, receiving elements, and reflecting pads. This acoustic field-based system eliminates mechanical contact, thereby improving reliability by avoiding accidental touches while maintaining operational convenience through flexible sensing zones on the side edge of the device.
Solution Approach 2:
The patent introduces reflecting pads as intermediary elements between the ultrasonic emitting elements and the external environment. These pads modulate the ultrasonic waves to detect pressing actions, serving as a mediator that enables reliable detection without requiring direct mechanical contact, thus resolving the contradiction between operational convenience and reliability.
2Adaptability or versatility
If mechanical keys are provided on the outer sidewall, then operation functions are available, but accidental touches occur and complex operations cannot be realized
Solution Approach 1:
By substituting mechanical keys with ultrasonic sensing, the system achieves both enhanced adaptability for complex operations and improved reliability. The acoustic sensing can detect various pressing patterns and intensities, enabling complex operation functions while the threshold-based detection prevents accidental touches from being misregistered.
Solution Approach 2:
The patent employs dynamic pressing detection with multiple thresholds (first threshold for wake-up, second threshold for other operations) and time-based validation. This dynamic approach allows the system to adapt to different operation complexities while maintaining reliability by distinguishing intentional presses from accidental touches based on pressing duration and intensity patterns.
3Ease of operation
If touch screens are used for control, then operation is convenient, but mechanical keys are needed for certain functions, reducing overall convenience
Solution Approach 1:
The patent merges the functions of touch screen control and mechanical key control into a unified ultrasonic sensing system. By placing emitting and receiving elements along with reflecting pads on the side edge, the system combines the advantages of both touch-based convenience and key-based reliability into a single integrated control mechanism, eliminating the need for separate mechanical keys.
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 more reliable and accurate press instructions, reducing the risk of accidental touches and allowing for complex operations without the need for mechanical keys, enhancing user experience.
Implementation Method 1
an emitting element including a first side and a second side thereopposite and emitting an ultrasonic wave
Implementation Method 2
receiving a reflected wave of the reflected ultrasonic wave
Implementation Method 3
a region of the reflecting pad corresponding to the pressed region deforms
Implementation Method 4
medium density in the deforming region increases
Data Source
AI summary
The present disclosure relates to a press sensing assembly and a terminal device. The press sensing assembly includes: an emitting element including a first side and a second side thereopposite and emitting an ultrasonic wave; a receiving element disposed adjacent to the emitting element, receiving a reflected wave of the reflected ultrasonic wave; and a reflecting pad disposed the first side and the receiving element, and a first surface of the reflecting pad abutting the emitting element and the receiving element, wherein when the second side and/or the receiving element are/is pressed, a region of the reflecting pad corresponding to the pressed region deforms, and a medium density in a deforming region increases.