Foldable Display Buffer Space Pneumatic Pressure Control
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Solution Overview
Problem
Existing foldable display devices suffer from wrinkling in the bendable region after multiple folds, which affects the display effect due to the lower position limit of the supporter during bending.
Innovation Solution
A foldable display device with a supporter featuring a bending portion and a buffer space, where an air pump is integrated to control gas pressure, allowing the bendable region to bend freely without being squeezed, and a reinforcing plate is used to prevent damage, along with sensors and controllers to manage the air pump and valve operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the supporter has a lower position limit on the bending region to prevent damage during bending, then the display panel is protected from damage, but the bending region is prone to wrinkling after multiple folding
Solution Approach 1:
The patent introduces a buffer layer as an intermediary between the supporter and the bendable region of the display panel. This buffer layer absorbs the pressing force from the supporter during bending, preventing direct contact and damage to the display panel while avoiding wrinkling of the bendable region. The buffer layer acts as a mediator that protects the display panel from the supporter's lower position limit constraint.
2Stability of the object's composition
If the supporter constrains the bendable region to prevent damage, then structural stability is improved, but the display effect deteriorates due to wrinkling
Solution Approach 1:
The buffer layer serves as an intermediary that maintains structural stability during bending while preventing display quality degradation. It allows the supporter to provide necessary mechanical support and stability without causing wrinkling that would affect the display effect.
3Ease of operation
If the buffer space is filled with gas at atmospheric pressure, then the bendable region can bend freely, but the display panel may be damaged by the supporter during bending
Solution Approach 1:
The patent utilizes pneumatic pressure control by adjusting the gas pressure in the buffer space. During bending operations, the gas pressure is reduced to create a negative pressure state, allowing the bendable region to bend freely without resistance from the buffer layer. This pneumatic adjustment enables free bending while preventing display panel damage.
Solution Approach 2:
The buffer layer's gas pressure is dynamically adjusted based on the bending state of the display device. The system transitions from atmospheric pressure during normal operation to negative pressure during bending, enabling the buffer layer to adapt its support characteristics and allow free bending while maintaining protection.
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 prevents wrinkling of the bendable region and enhances the display effect by allowing the display panel to bend freely and maintain a stable negative pressure state, reducing the risk of damage and improving the overall performance of the foldable display device.
Implementation Method 1
the air pump is configured to draw at least a portion of gas in the buffer space when the foldable display device is flattened, so that the bendable region of the display panel is in a state of adhering to an upper surface of the bending portion of the supporter under action of external atmospheric pressure
Implementation Method 2
the bendable region of the display panel is in a state of adhering to an upper surface of the bending portion of the supporter under action of external atmospheric pressure
Data Source
AI summary
The present application discloses a foldable display device, including a display panel including a bendable region; a supporter disposed under the display panel to support the display panel, the supporter including a bending portion located below the bendable region, a buffer space formed between the bending portion and the bendable region; and an air pump mounted on the supporter, and in communication with the buffer space.