Rollable Display Flexible Films Heat Dissipation
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Solution Overview
Problem
Conventional rollable display devices face limitations in flexibility, heat radiation efficiency, and stress management during winding and unwinding, which restrict their ability to display high-resolution images and maintain structural integrity.
Innovation Solution
A rollable display device design featuring a flexible display panel with a printed circuit board and multiple flexible films that can be bent and extended to minimize thickness, resistance, and heat generation, allowing for flexible winding directions and improved heat radiation by disposing films on the rear surface of a back cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If flexible films are extended to minimum length, then thickness increase is minimized and resistance is reduced, but stress during winding and unwinding increases
Solution Approach 1:
The patent changes the physical parameters of the flexible films by controlling their thickness (5-20 micrometers) and material composition to achieve optimal balance between minimal thickness for reduced resistance and sufficient strength for stress resistance during winding operations
Solution Approach 2:
The patent employs composite flexible film structures with multiple layers having different properties - conductive layers for electrical function, support layers for mechanical strength, and protective layers for durability - enabling the films to maintain minimal thickness while withstanding winding stresses
2Temperature
If flexible films are disposed on rear surface of back cover, then heat radiation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent moves the heat radiation function to a different spatial dimension by disposing flexible films on the rear surface of the back cover, utilizing the third dimension (depth/thickness direction) to improve heat radiation efficiency without increasing the footprint area of the device
Solution Approach 2:
The flexible films serve multiple functions simultaneously: electrical connection, mechanical flexibility, and heat radiation - enabling a single component to address multiple technical requirements without proportionally increasing device complexity
3Reliability
If flexible films are extended to have slack, then stress during winding is minimized, but thickness increase occurs
Solution Approach 1:
The patent utilizes flexible thin film structures with specific material properties (elastic modulus, tensile strength) that allow the films to accommodate winding stresses through elastic deformation rather than requiring excessive slack, thereby maintaining minimal thickness while ensuring stress resistance
4Temperature
If multiple flexible films are used, then heat radiation efficiency is improved and protection is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple flexible films into an integrated multi-layer structure where conductive layers, support layers, and protective layers are laminated together, enabling simultaneous achievement of heat radiation efficiency, mechanical strength, and ease of handling during manufacturing
Data Source
AI summary
A high-resolution rollable display device is disclosed. The display device includes a rollable display panel having a first side and a second side that is longer than the first side. A printed circuit board is disposed along the first side of the rollable display panel. A plurality of flexible films are connected to the printed circuit board. In one embodiment, a first end of each of the plurality of flexible films is connected to the printed circuit board at the first side of the rollable display panel and a second end of each of the plurality of flexible films is connected to the second side of the rollable display panel.