Floating Optical Key Interface for Non-Contact Input Accuracy
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Solution Overview
Problem
Existing input devices, such as physical mechanical keys and surface touch apparatuses, suffer from wear and sanitation issues due to direct contact, and voice-controlled devices face challenges with accuracy and multi-user interference.
Innovation Solution
A non-contact key system comprising a frame with a display module that forms a default floating image using a light source, optical unit, and lens array, along with a touch module for establishing a floating touch area, allowing for identification and operation without physical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a physical mechanical key or surface touch apparatus is used, then input operation is straightforward, but wear is caused after long-term use and sanitation management becomes difficult
Solution Approach 1:
The patent replaces the physical mechanical key with an optical system comprising a light source, optical unit, imaging unit, and lens array that projects a floating image in air. This substitutes mechanical contact with optical field interaction, eliminating wear on physical components while maintaining input functionality through the floating touch area that detects hand proximity or contact without requiring surface contact.
Solution Approach 2:
The patent introduces an optical field as an intermediary between the user and the input device. The floating image projected in air serves as a virtual interface that mediates interaction, allowing users to input commands through hand proximity or contact with the invisible optical field rather than directly touching physical surfaces, thus solving both wear and sanitation issues.
2Reliability
If a voice-controlled input device is used, then non-contact input is achieved, but it is difficult to accurately input instructions and multi-user interference occurs
Solution Approach 1:
The patent replaces voice control with an optical-based floating image interface that uses hand proximity detection or contact with the optical field. This substitution provides visual and tactile feedback through the floating image, enabling more precise input recognition compared to voice control, while maintaining non-contact operation benefits.
3Loss of information
If a floating image is formed using light source, optical unit, imaging unit, and lens array, then non-contact identification is enabled, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into a unified optical system. The same light source, optical unit, imaging unit, and lens array that create the floating image also enable the floating touch area functionality. This multi-functionality reduces the need for separate components for image projection and touch detection, thereby managing complexity while providing comprehensive non-contact interaction capabilities.
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 solution enables accurate and sanitary input operations by forming a floating image for identification and corresponding touch functions, reducing wear and sanitation risks while improving usability across various situations.
Implementation Method 1
a first light source, an optical unit, an imaging unit arranged on a side of the optical unit facing away from the first light source and having a preset pattern, and a lens array arranged on a side of the imaging unit facing away from the first light source. Based on the above, corresponding to a preset pattern, light emitted by the first light source passes through the optical unit, the imaging unit, and the lens array to form a default floating image
Data Source
AI summary
The present invention provides a display device, which includes a frame having an accommodating cavity and a display module disposed in the accommodating cavity. The display module includes a first light source, an optical unit, an imaging unit arranged on a side of the optical unit facing away from the first light source, and a lens array arranged on a side of the imaging unit facing away from the first light source. Corresponding to a preset pattern, light emitted by the first light source passes through the optical unit, the imaging unit and the lens array to form a default floating image in a floating display area outside the accommodating cavity. In addition, the present invention also provides a non-contact key and an input device including the above display module.