3D Touch Panel UI With Reflective Sidefaces for Oblique Visibility
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Solution Overview
Problem
Conventional three-dimensional user interfaces (UI) face challenges in maintaining visibility of images and icons when viewed from oblique angles, particularly in limited display areas, leading to reduced visibility and increased touch operation errors, especially in situations like in-vehicle use where direct line-of-sight is obstructed.
Innovation Solution
An input display device with a capacitive touch panel featuring transparent three-dimensional operation units that include a side face with reflective properties, such as a mirror-finished or specular-coated surface, which enhances image visibility by reflecting GUI elements along the side face, and a detection unit to adjust the image display based on the user's viewpoint or line-of-sight direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a three-dimensional operation unit is used to enable tactile recognition, then touch operation accuracy is improved, but image visibility from oblique directions deteriorates
Solution Approach 1:
The patent utilizes the side face of the three-dimensional operation unit as an additional display dimension. By forming a reflective film on the side face, the system displays operation-related images not only on the front face but also on the side surface, effectively converting a three-dimensional structure into multiple two-dimensional display areas. This resolves the contradiction by maintaining image visibility from oblique directions through the side face display while preserving the tactile recognition function of the three-dimensional shape.
Solution Approach 2:
The patent applies different functional properties to different parts of the operation unit. The front face maintains its transparent or translucent property for direct viewing, while the side face is equipped with a reflective film for oblique viewing. This local differentiation of optical properties allows each surface to optimize its function for the intended viewing angle, thereby maintaining both tactile recognition and image visibility across different observation conditions.
2Shape
If the display area is limited to the front face of the operation unit, then the three-dimensional shape can be maintained, but image visibility and detail representation deteriorate when viewed from oblique angles
Solution Approach 1:
The patent extends the display area from the front face to the side face of the three-dimensional operation unit. By forming a reflective film on the side face, the system creates an additional display surface that is visible from oblique directions. This effectively utilizes the three-dimensional structure to provide multiple viewing angles without compromising the shape, as the side face itself becomes a functional display area rather than merely a structural element.
3Loss of information
If a reflective film is added to the side face, then image visibility from oblique directions is improved, but device complexity increases
Solution Approach 1:
The side face of the operation unit serves multiple functions: it maintains the three-dimensional shape for tactile recognition, acts as a structural element of the operation unit, and simultaneously functions as a display surface through the reflective film. By making the side face multi-functional, the patent avoids adding separate components for oblique viewing, thereby improving image visibility while minimizing the increase in device 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
The solution significantly improves image visibility and diversifies the expression of operation-related images by extending the display area and maintaining clarity even when viewed from different angles, reducing touch errors and enhancing usability in constrained environments.
Implementation Method 1
the side face has a function of reflecting an image related to the operation
Implementation Method 2
A highly sensitive electrostatic sensor capable of sensing the electrostatic capacitance (distance) of the finger even when the finger is away from the sensor is used for the touch sensing
Data Source
AI summary
An input display device includes a display capable of displaying an image, a touch panel including at least one transparent three-dimensional UI unit on a front face thereof, a touch sensing unit configured to sense a touch operation on the touch panel based on a change in electrostatic capacitance of the touch panel, and a display control unit capable of displaying an image related to the operation in a region where the three-dimensional UI unit of the display is present. The three-dimensional UI unit includes an upper face and a side face connected to the upper face, and a function of reflecting an image related to an operation is imparted to the side face.