Electrostatic Display Device with Isolated Movable Member
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Solution Overview
Problem
Conventional display devices face challenges in maintaining a simplified structure while ensuring high aperture ratio, as signal transmitting lines require a minimum width to withstand high voltages, but widening them decreases the aperture ratio.
Innovation Solution
A display device utilizing a substrate with a first and second electrode, an insulating layer, and an isolated movable member that generates induction charges by electrostatic attraction, allowing light transmittance control without the need for signal lines, thus maintaining a simplified structure and high aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the signal transmitting line width is increased to withstand high voltage, then the reliability of the signal line is improved, but the aperture ratio is decreased
Solution Approach 1:
The patent extracts and eliminates the signal transmitting line from the display device structure. By using the electrostatic induction phenomenon where the isolated member automatically generates induction charge through voltage application to the first and second electrodes, the need for separate signal transmitting lines is removed entirely, thus resolving the contradiction between signal line reliability and aperture ratio
Solution Approach 2:
The isolated member serves itself by automatically generating the necessary induction charge through electrostatic induction when voltage is applied to the electrodes. This self-service mechanism eliminates the need for external signal transmitting lines to supply control signals, thereby maintaining high aperture ratio while ensuring reliable voltage application
2Reliability
If the signal transmitting line width is increased, then the signal line can endure high voltage, but the device structure becomes more complex
Solution Approach 1:
The signal transmitting line is extracted and removed from the device structure. The patent utilizes the inherent electrostatic induction phenomenon where applying voltage to the first and second electrodes automatically generates induction charge in the isolated member, eliminating the need for additional signal transmitting lines and simplifying the overall device structure
Solution Approach 2:
The first and second electrodes serve multiple functions: they apply voltage to control the electrostatic force between electrodes and simultaneously generate induction charge in the isolated member through electrostatic induction. This multi-functionality eliminates the need for separate signal transmitting lines, reducing structural complexity
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 eliminates the need for signal lines, simplifying the device structure and enhancing the aperture ratio by using electrostatic induction to control light transmittance through a movable member's deformation, which returns to its original shape when voltages are removed.
Implementation Method 1
An induction charge is generated in the isolated member by the application of the first voltage and the second voltage
Implementation Method 2
The movable member may be a movable member that is deformed by an electrostatic attraction force with the first electrode and the second electrode according to the generation of the induction charge
Data Source
AI summary
The present invention relates to a display device including a substrate having a display area, a first electrode disposed on the substrate to receive a first voltage, a second electrode disposed on the substrate to receive a second voltage having an opposite polarity to that of the first voltage, an insulating layer disposed on the first electrode and the second electrode, and an isolated member disposed on the insulating layer and electrically isolated, wherein an induction charge is generated in the isolated member by application of the first voltage and the second voltage, and wherein light transmittance is controlled according to the application of the first and second voltages.