Rollable Display Panel Protection Using an Auxiliary Roller Sheet
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Solution Overview
Problem
Display panels are prone to cracking due to contact with the module cover during winding and unwinding processes in existing display devices, which compromises their structural integrity and functionality.
Innovation Solution
A display device design incorporating a protective sheet connected to an auxiliary roller that prevents the display panel from contacting the module cover by using a nonwoven fabric and a coil spring mechanism, ensuring the panel remains protected during state changes, with a guide assembly to maintain alignment and prevent inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a liquid crystal display is used, then power consumption is reduced compared to plasma displays, but viewing angle is limited and image quality deteriorates at oblique angles
Solution Approach 1:
The display panel is divided into multiple sub-pixels (red, green, blue) arranged in a specific pattern, with each sub-pixel having independent control electrodes that can be independently driven to emit light in specific directions, thereby expanding the effective viewing angle while maintaining LCD power efficiency
Solution Approach 2:
Different regions of the display employ different electrode arrangements and light emission characteristics tailored to specific viewing zones, with central regions optimized for direct viewing and peripheral regions optimized for oblique viewing angles
2Illumination intensity
If transparent conductive oxide is used for electrodes, then transparency is achieved, but electrode resistance is high and precise potential control is difficult
Solution Approach 1:
The patent combines transparent conductive oxide layers with metal electrode patterns to create a composite electrode structure that achieves both transparency and low resistance, allowing precise potential control while maintaining visual clarity
Solution Approach 2:
The electrode structure uses composite materials including transparent conductive oxide and metal layers with different electrical properties, creating an electrode that simultaneously provides transparency, low resistance, and precise electrical control
3Illumination intensity
If plasma display technology is used, then high brightness and wide viewing angle are achieved, but power consumption is excessive and nitrogen gas is consumed
Solution Approach 1:
The patent replaces the plasma discharge mechanism (electrical/chemical system) with a field-effect controlled liquid crystal system that uses voltage-controlled light modulation, achieving similar visual output with significantly lower power consumption and no gas consumption
Solution Approach 2:
The display technology transitions from plasma's high-energy discharge state to liquid crystal's low-energy field-effect state, changing the operational parameters from high power consumption to low power consumption while maintaining image quality
4Ease of manufacture
If organic EL is used for color filters, then manufacturing simplicity is achieved, but red color emission is weak and requires phosphorescence which increases power consumption
Solution Approach 1:
The patent extracts the color filtering function from the liquid crystal layer and places it in the electrode structure itself, where transparent conductive oxide and metal patterns naturally form red, green, and blue color regions, eliminating the need for separate organic EL phosphorescence layers
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 protective sheet effectively prevents the display panel from cracking by maintaining a safe distance from the module cover, enhancing the panel's durability and reliability during mechanical stress, thus ensuring a stable and functional display.
Implementation Method 1
a first transparent electrode layer including a first transparent conductive oxide layer... configured to generate a first electric field
Implementation Method 2
a liquid crystal layer... between the first transparent electrode layer and the second transparent electrode layer
Data Source
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AI summary
A display device is disclosed. The display device includes a housing, a plurality of rollers positioned inside the housing, a display unit including a display panel and a module cover having at least one apron, of which at least a portion is connected to each other, and a driver including a motor assembly, an upper bar coupled to an upper part of the display unit, and at least one support portion having one side coupled to both ends of the upper bar and the other side coupled to the motor assembly and moving up and down the upper bar. The display panel and the module cover are in a first state in which they are wound around the roller or a second state in which they are unwound from the roller, contact each other, and are exposed to the outside of the housing.