Vehicle Display Layered Structure for Flat Touch Interface Visibility
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Solution Overview
Problem
Vehicle-mounted display devices with touch sensor integration face challenges in operability due to the complexity of combining touch sensor functionality with aesthetic design, particularly in ensuring visibility and maintaining a flat, aesthetically pleasing front face.
Innovation Solution
A layered structure comprising a software switch region with a first transparent resin layer, symbol and design printed layer, smoke printed layer, touch sensor sheet, and diffusion sheet, combined with a liquid crystal touch panel region using a second transparent resin layer and touch sensor sheet, where the software switch region is illuminated from the backside to enhance visibility and operability, and a hard switch is provided for critical operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a touch sensor sheet is incorporated to provide software switch function, then the number of hard switches can be reduced and the front face can be made flat, but the operability becomes poor
Solution Approach 1:
The display device is divided into multiple functional layers including transparent resin layer, symbol printed layer, smoke printed layer, touch sensor sheet, and diffusion sheet. This segmentation allows each layer to perform its specific function while collectively improving operability through enhanced visual feedback and tactile response.
Solution Approach 2:
The smoke printed layer changes its light transmission properties based on touch input, transitioning from a darkened state to a illuminated state when activated. This visual change provides clear feedback to the user, significantly improving operability by making the software switch status immediately recognizable.
2Shape
If multiple layers are stacked to achieve both aesthetic design and touch functionality, then the design becomes more complex, but the manufacturing process becomes more difficult
Solution Approach 1:
Multiple functional layers (transparent resin layer, symbol printed layer, smoke printed layer, touch sensor sheet, and diffusion sheet) are combined into a single integrated assembly. This merging approach maintains the aesthetic flat front face design while simplifying manufacturing by treating the multi-layer structure as one unified component rather than separate assemblies.
Solution Approach 2:
The patent employs a composite structure combining transparent resin material, printed layers with different optical properties (symbol layer, smoke layer), touch sensor material, and diffusion material. This composite approach enables each material to contribute its specific properties while being manufactured as an integrated unit, balancing aesthetic requirements with manufacturing feasibility.
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 improves operability and durability by ensuring high visibility and ease of use, maintains a flat and aesthetically pleasing design, and allows for smooth finger movement between switch regions, while reducing mechanical parts and costs through shared detection circuits.
Implementation Method 1
light emitted from a light source and passing through the design translucent part of the translucent layer is viewed from the front side of the board
Implementation Method 2
a diffusion sheet are layered in order from the front side toward the back side
Data Source
AI summary
A vehicle-mounted display device includes a software switch region in which a first transparent resin layer, a symbol and design printed layer, a smoke printed layer, a first touch sensor sheet, and a diffusion sheet are layered in order from the front side toward the back side, and a liquid crystal touch panel region in which a second transparent resin layer, a second touch sensor sheet, and a liquid crystal sheet are layered in order from the front side toward the back side. Since the software switch region includes the diffusion sheet, not only is it possible to ensure the visibility when sunlight shines, but it is also possible to prevent the internal structure from being seen when the light source is turned off, thus enhancing the quality of the external appearance.