Multilayer Light Source Sensor Substrate for Shared Terminal Layout
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Solution Overview
Problem
The configuration of light source and sensor substrates in display devices, where light emitting elements and detecting coils are disposed on different outermost surfaces, leads to inefficiencies in terminal connection and limited housing space, affecting the design freedom for position detecting and light emitting functions.
Innovation Solution
A light source-equipped sensor substrate with multiple mounting layers, including a first and second mounting layer with terminals on the same outermost side, and insulating layers to separate these layers, along with specific wiring configurations to minimize interference and improve connection workability and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light emitting elements and detecting coils are disposed on different outermost surface layers, then functional separation is achieved, but terminal connection efficiency decreases and housing space is limited
Solution Approach 1:
The patent combines the light source substrate and sensor substrate into a single integrated substrate structure. The light emitting elements and detecting coils are disposed on different layers of the same substrate, allowing terminal connections to be made at the same position on the integrated substrate, thereby improving terminal connection efficiency while maintaining functional separation between light emitting and sensing functions.
Solution Approach 2:
The patent utilizes vertical layering within the substrate to separate different functions. By disposing light emitting elements and detecting coils on different outermost surface layers of the integrated substrate, the patent achieves functional separation in the vertical dimension while keeping terminal connections accessible at the same horizontal position, thus resolving the contradiction between functional separation and connection efficiency.
2Adaptability or versatility
If light emitting elements and detecting coils are disposed on different outermost surface layers, then functional specialization is achieved, but housing space becomes limited
Solution Approach 1:
The patent embeds the sensor substrate within the light source substrate structure, with detecting coils disposed on an outermost surface layer of the integrated substrate. This nested configuration allows both light emitting and sensing functions to coexist within the same housing space, achieving functional specialization without increasing overall device volume.
Solution Approach 2:
By merging the light source substrate and sensor substrate into a single integrated substrate, the patent consolidates multiple functions into one component. This reduces the total number of separate components and housing spaces required, thereby achieving functional specialization while minimizing housing space occupation.
3Adaptability or versatility
If multiple mounting layers are used for light emitting elements and detecting coils, then design freedom is improved, but layer interference increases
Solution Approach 1:
The patent introduces an insulating layer between the light emitting elements and detecting coils on different outermost surface layers of the integrated substrate. This insulating layer acts as an intermediary that electrically isolates the two functional layers, preventing electromagnetic interference while allowing both functions to operate simultaneously within the same substrate structure.
Solution Approach 2:
The patent extracts the electromagnetic interference problem by removing the harmful electromagnetic coupling between light emitting elements and detecting coils through the insulating layer. This extraction of the harmful interaction allows multiple functional layers to coexist without interference, maintaining design freedom while eliminating layer interference.
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
Enhances the design freedom for both position detecting and light emitting functions by improving terminal connection efficiency and reducing interference, while allowing for better heat management and visibility of alignment marks.
Implementation Method 1
a coil wiring unit provided with a detecting coil group for detecting a signal from electromagnetic induction type electronic pens
Data Source
AI summary
Provided is a light source-equipped sensor substrate including a plurality of mounting layers mounted with a light emitting element array as a plurality of light emitting elements, a driving wiring unit of the light emitting element array, and a coil wiring unit including a detecting coil group, and one or more insulating layers configured to insulate adjacent layers of the plurality of mounting layers from each other, the plurality of mounting layers including a first mounting layer provided with at least the light emitting element array and a part of the driving wiring unit, and a second mounting layer provided with at least a part or a whole of the coil wiring unit, and the first mounting layer being further provided with a part of the coil wiring unit, and/or the second mounting layer being further provided with another part of the driving wiring unit.