Display Device Input Sensing Layer Approach Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices require additional sensors to determine if an object is approaching, which increases manufacturing costs and reduces design flexibility.
Innovation Solution
A display device with an input sensing layer that uses a sensing controller to generate location and approach information signals based on touch position data, employing a convolutional neural network for signal classification and determining object proximity without additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensors are used to determine object approach, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The input sensing layer is designed to perform multiple functions: it detects both touch positions (original function) and object approach distances (new function). By making the sensing layer universal, the patent eliminates the need for separate proximity sensors, thereby reducing device complexity while maintaining measurement precision through sophisticated signal processing algorithms that analyze capacitance variations at different spatial locations.
Solution Approach 2:
The patent combines the touch detection function and proximity detection function into a single integrated sensing system. The input sensing layer simultaneously captures touch position information and object approach information, merging two previously separate sensing functions into one unified system, which reduces the number of components and simplifies the overall device architecture.
2Measurement precision
If additional sensors are installed for proximity detection, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The input sensing layer serves dual purposes as both a touch detector and a proximity sensor. This multi-functionality eliminates the need to manufacture and assemble additional separate proximity sensors, thereby reducing manufacturing costs while still achieving accurate object approach detection through advanced signal classification techniques.
Solution Approach 2:
The sensing controller performs self-service by processing the raw sensing signals from the input sensing layer to extract both touch position and proximity information. Through signal classification and processing algorithms, the controller derives multiple types of information from a single sensing layer, eliminating the need for additional dedicated sensors and reducing overall system manufacturing costs.
3Device complexity
If the input sensing layer is used for both touch position and proximity detection, then device complexity is reduced, but measurement precision may deteriorate
Solution Approach 1:
The sensing controller acts as an intermediary that processes raw sensing signals and classifies them into different categories (touch vs. approach, different distance levels). By introducing sophisticated signal processing and classification algorithms as intermediaries, the system can accurately distinguish between different types of inputs from the single sensing layer, maintaining measurement precision despite the simplified hardware architecture.
Solution Approach 2:
The system changes parameters such as driving frequencies and signal processing methods to optimize detection accuracy. By adjusting these parameters dynamically and using machine learning-based signal classification, the system maintains high measurement precision for both touch position and proximity detection while using a single multi-functional sensing layer, thus avoiding the need for additional sensors.
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 determination of object approach without additional sensors, reducing manufacturing costs and enhancing design freedom by utilizing the input sensing layer for both touch position and proximity detection.
Implementation Method 1
an input sensing layer disposed on the display panel and which outputs a sensing signal in response to an external input and an approach of an object
Data Source
AI summary
A display device includes a display panel, an input sensing layer disposed on the display panel and which outputs a sensing signal in response to an external input and an approach of an object, and a sensing controller which controls a drive of the input sensing layer and receives the sensing signal from the input sensing layer. The sensing controller includes a location sensing block which generates a location information signal including location information of the external input in response to the sensing signal, and an approach sensing block which determines whether the object approaches in response to the sensing signal and generates an approach information signal.