Thin Tactile Display Panels With Backside Piezoelectric Integration
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Solution Overview
Problem
Existing tactile reproduction display panels face challenges in achieving a narrow frame design and reduced thickness due to the placement of piezoelectric vibration devices, which affect light emission and cause noise due to cavities or air layers.
Innovation Solution
The piezoelectric vibration devices are positioned at the side of the light exiting surface opposite to the display panel, eliminating the need for cavities or air layers, and are integrated with the display panel to reduce frame width and thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If piezoelectric vibration devices are placed at the light exiting surface side, then light emission is improved, but frame width increases and thickness increases
Solution Approach 1:
The patent relocates the piezoelectric vibration devices from the light exiting surface side (first dimension) to the back side of the display panel (second dimension). This dimensional relocation allows the vibration devices to be positioned without interfering with light emission, thereby maintaining illumination intensity while reducing frame width and achieving narrower frame design.
Solution Approach 2:
Instead of placing the piezoelectric vibration devices on the front side of the display panel where they would interfere with light emission, the patent inverts the placement strategy by positioning them on the back side. This inversion resolves the contradiction by allowing light to pass through the front side unobstructed while still providing tactile feedback functionality.
2Illumination intensity
If piezoelectric vibration devices are placed at the light exiting surface side, then light emission is improved, but thickness increases
Solution Approach 1:
The patent relocates the piezoelectric vibration devices from the front side structure (increasing thickness) to the back side of the display panel. This dimensional relocation allows the vibration devices to be integrated into the back structure, reducing the overall thickness of the display panel while maintaining light emission performance from the front side.
3Ease of operation
If cavities or air layers are introduced for piezoelectric vibration devices, then vibration function is improved, but luminous efficiency decreases and noise increases
Solution Approach 1:
The patent merges the piezoelectric vibration devices with the back side structure of the display panel, eliminating the need for separate cavities or air layers. This integration allows the vibration function to be achieved while maintaining the structural integrity and optical performance of the display panel, thereby preventing luminous efficiency loss and reducing noise.
4Ease of operation
If cavities or air layers are introduced for piezoelectric vibration devices, then vibration function is improved, but noise increases
Solution Approach 1:
The patent merges the piezoelectric vibration devices with the back side structure of the display panel, eliminating the need for separate cavities or air layers that would amplify noise. This integration allows the vibration function to be achieved while minimizing noise generation by avoiding resonant cavities.
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
This configuration reduces frame width, achieves a narrow frame design, enhances vibration integration, and prevents noise and luminous efficiency loss, while maintaining effective tactile sensation simulation.
Implementation Method 1
each of the piezoelectric vibration devices includes a driver electrode structure and a piezoelectric layer, and the driver electrode structure is configured to drive the piezoelectric layer to deform so as to generate vibration
Data Source
AI summary
A tactile reproduction display panel and a display apparatus including the same. The tactile reproduction display panel includes a display panel and a plurality of piezoelectric vibration devices; the display panel includes a base substrate and a plurality of pixel units on the base substrate; each of the piezoelectric vibration devices comprises a driver electrode structure and a piezoelectric layer, and the driver electrode structure is configured to drive the piezoelectric layer to deform so as to generate vibration; the display panel comprises a light exiting surface, the light exiting surface has a first side and a second side in a direction perpendicular to the base substrate, the light exiting surface is configured to emit light to the first side, and the plurality of piezoelectric vibration devices are at the second side of the light exiting surface.