Proximity Touch Sensor Noise Remover Structure
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Solution Overview
Problem
Conventional electronic devices with proximity touch functions face challenges in accurately sensing pointer motion and distance due to noise interference from light emitters, especially when the motion is slight or occurs at a long range, which affects the reliability and precision of the proximity touch area.
Innovation Solution
The implementation of optical sensor modules with a noise remover structure, featuring distinct holes and light emitter/receiver arrangements, diffusers, and filters to minimize noise and enhance light reception, allowing for a wider proximity touch area and accurate pointer motion recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional proximity touch sensing is used without noise remover, then device structure is simple, but noise interference from light emitters reduces measurement precision
Solution Approach 1:
The optical sensor module is segmented into distinct functional regions: light emitter holes, light receiver holes, and noise remover holes. This segmentation allows each component to perform its specific function without interference, with the noise remover holes specifically dedicated to blocking harmful light from reaching the receiver.
Solution Approach 2:
The harmful light interference is extracted and isolated through dedicated noise remover holes positioned between the light emitters and receivers. These holes contain absorptive material that specifically targets and removes the harmful light wavelengths, separating the useful light path from the harmful interference.
2Area of stationary object
If light emitters and receivers are placed close together for compact design, then device area is reduced, but noise interference from light emitters increases
Solution Approach 1:
The noise remover holes are strategically positioned in specific locations where harmful light from adjacent emitters would reach the receivers. The absorptive material in these holes provides localized noise cancellation exactly where needed, allowing compact emitter-receiver placement while maintaining signal quality.
Solution Approach 2:
The noise remover holes with absorptive material act as intermediary elements between the light emitters and receivers. These intermediaries block the harmful light paths that would otherwise directly connect emitters to receivers in compact configurations, enabling closer placement without increasing interference.
3Measurement precision
If noise remover with absorptive material is added to block harmful light, then measurement precision is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The noise remover is implemented as a porous or honeycomb-like structure with holes of specific sizes and patterns. This porous architecture provides effective light blocking through the absorptive material while maintaining a relatively simple manufacturing process using conventional semiconductor fabrication techniques for creating precise hole patterns.
Solution Approach 2:
The optical sensor module uses composite construction combining transparent substrates for the display with integrated noise remover layers containing absorptive materials. This composite approach allows the noise remover to be fabricated as part of the overall device structure using layered manufacturing processes, reducing overall manufacturing complexity.
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 solution effectively reduces noise interference, enabling precise and reliable detection of pointer motion and distance, even for slight or distant movements, thereby enhancing the electronic device's reliability and accuracy.
Implementation Method 1
a light receiver to receive the light reflected by the pointer
Implementation Method 2
a light receiver to receive the light reflected by the pointer and convert the received light into an electrical signal
Implementation Method 3
a noise remover to block noise light from the light emitter, wherein the noise remover includes a plurality of holes
Data Source
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AI summary
An electronic device having a proximity touch function is disclosed. The device includes a display unit; a bezel frame that surrounds the display unit; a plurality of light emitters located on the bezel frame and spaced apart from each other; a plurality of light receivers located on the bezel frame and spaced apart from each other; a noise remover located on the bezel frame and including a plurality of first holes spaced apart from each other and a plurality of second holes spaced apart from each other; and a cover located on the noise remover. Respective light emitters are located in respective first holes. Respective light receivers are located in respective second holes.