Elastic Member Rear Placement for Tactile Display Feedback
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Solution Overview
Problem
Touch panels in display devices lack input feedback, making it difficult for users to feel the sense of input, and existing solutions that provide tactile feedback often deteriorate image quality or require complex structures that interfere with the display.
Innovation Solution
A display device with a touch sensor and a display panel where an elastic member is provided below the panel, allowing for input feedback without obstructing the image quality, and the elastic member can be arranged at the corners, periphery, or in a matrix to ensure uniform input feeling across the touch sensor area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a columnar spacer or click member is provided on the panel display surface to create input feeling, then tactile feedback is improved, but image quality deteriorates due to light interference and complex structure
Solution Approach 1:
The elastic member is moved from the front surface (2D plane) to the rear surface (another dimension) of the display panel. This spatial relocation allows the tactile feedback mechanism to operate without interfering with the optical path, thus maintaining image quality while providing input feeling through compression of the elastic member at the rear surface.
Solution Approach 2:
The elastic member is extracted from the display area and placed in the non-display area (rear surface). This separation removes the potential harmful effect of light interference caused by spacers or click members on the front surface, while still achieving the desired tactile feedback function through the elastic member's compression and expansion at the rear surface.
2Ease of operation
If a complex shaped click member is provided to obtain clicking sense, then input feeling is improved, but device complexity increases and image display is obstructed
Solution Approach 1:
Instead of providing the elastic member on the front surface where it would create complex structures in the optical path, the invention inverts the approach by placing the elastic member on the rear surface. This simple inversion allows the same tactile feedback function to be achieved without complex structures interfering with image display.
3Ease of operation
If a member creating operational feeling is provided inside the touch sensor portion, then tactile feedback is improved, but recognition accuracy deteriorates due to interference with sensor operation
Solution Approach 1:
The elastic member is positioned in another dimension (rear surface) relative to the touch sensor portion (front surface). This spatial separation ensures that the elastic member does not interfere with the touch sensor's ability to detect touch positions accurately, while still providing operational feeling through its compression and expansion at the rear surface.
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 provides a high-definition display with improved recognition accuracy and tactile feedback without compromising image quality, as the elastic member contracts when pressed, allowing the touch sensor to work in conjunction with the display panel while maintaining a clear optical path.
Implementation Method 1
an elastic member which can expand and contract by application of compressive stress or tensile stress
Data Source
AI summary
To provide a display device including a touch sensor, in which input feeling can be obtained and deterioration of image quality is suppressed. The display device includes a touch sensor portion, a display panel, an elastic member, and a support. The touch sensor portion is provided over the display panel. The support is provided below the display panel. The elastic member is provided between the display panel and the support. The elastic member is provided in part of the periphery of a pixel region included in the display panel or in the entire periphery.