Haptic Display Panel Layout for Narrow Bezels and Thin Vibration
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Solution Overview
Problem
Existing tactile reproduction display panels face challenges in achieving a narrow frame design, reducing thickness, and maintaining light efficiency due to the integration of piezoelectric vibration devices, which cause issues like increased frame width, thickness, and light reflection or noise from cavities.
Innovation Solution
The tactile reproduction display panel integrates piezoelectric vibration devices on the side of the light exiting surface or on a common substrate with the display panel, avoiding cavities and air layers, thereby reducing frame width, thickness, and minimizing light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If piezoelectric vibration devices are integrated on the display panel, then tactile feedback function is improved, but frame width increases
Solution Approach 1:
The piezoelectric vibration device is merged with the display panel by integrating it on the same side of the light exiting surface, eliminating the need for separate cavities and air layers. This combining approach maintains tactile feedback functionality while reducing the overall frame width.
Solution Approach 2:
The vibration device is positioned in the plane of the display panel rather than extending perpendicular to it through cavities. This dimensional repositioning allows the vibration function to be achieved without increasing the frame width in the lateral direction.
2Force
If piezoelectric vibration devices are integrated with cavities, then vibration effect is improved, but thickness increases
Solution Approach 1:
The cavity and air layer structures are extracted from the design, eliminating the need for thick sealed chambers. The vibration device operates directly on the display panel surface, achieving vibration effect without the thickness penalty of traditional cavity-based designs.
Solution Approach 2:
The display panel itself serves as the flexible membrane for vibration transmission. By using the panel's own structure rather than adding rigid cavity walls, thin-film flexibility is maintained while achieving effective tactile feedback.
3Object-generated harmful factors
If cavities and air layers are used for piezoelectric devices, then vibration isolation is improved, but light efficiency decreases
Solution Approach 1:
The vibration device and display panel are merged into a single integrated structure, eliminating cavities and air layers that would cause light reflection and reduce luminous efficiency. The integration maintains vibration isolation while preserving light transmission.
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 integration enhances the vibration effect, allows for a narrow frame design, reduces thickness, and maintains high light efficiency by eliminating noise and luminous efficiency losses associated with cavities and air layers.
Implementation Method 1
each piezoelectric vibration device includes a driver electrode structure and a piezoelectric layer, and the driver electrode structure is configured to drive the piezoelectric layer to deform to generate vibration
Data Source
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AI summary
A haptic rendering display panel (100) and a display device comprising the haptic rendering display panel (100). The haptic rendering display panel (100) comprises a display panel (110) and a plurality of piezoelectric vibration devices (120); the display panel (110) comprises a base substrate (112) and a plurality of pixel units (200) located on the base substrate (112); each piezoelectric vibration device (120) comprises a driving electrode structure (125) and a piezoelectric layer (122), and the driving electrode structure (125) is configured to drive the piezoelectric layer (122) to deform so as to generate vibration; the display panel (110) comprises a light exit surface (118), the light exit surface (118) has a first side (301) and a second side (302) in a direction perpendicular to the base substrate (112), the light exit surface (118) is configured to emit light towards the first side (301), and the plurality of piezoelectric vibration devices (120) are located on the second side (302) of the light exit surface (118). The haptic rendering display panel (100) can prevent the piezoelectric vibration devices (120) from adversely affecting light emission, thereby reducing the width of a frame and realizing a narrow frame design.