Electrowetting Display Panel with Stacked Colored Fluid Layers
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Solution Overview
Problem
Current electrowetting display technologies require multiple sub-pixels to achieve full color display, limiting display resolution and efficiency.
Innovation Solution
A display panel and control method utilizing two pixels with colored fluid layers and transparent conductive fluids, where the fluid layers change shape in response to electric fields to display a wide range of colors, including white and black, thereby increasing display resolution by 33%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sub-pixels are used to achieve full color display, then color display capability is improved, but display resolution is limited
Solution Approach 1:
The patent merges the functions of multiple sub-pixels into a single pixel structure by stacking colored fluid layers (red, green, blue) vertically between two substrates. This allows full color display capability to be achieved while increasing the number of pixels per unit area, thereby improving display resolution.
Solution Approach 2:
The patent transitions from a planar arrangement of multiple sub-pixels to a three-dimensional stacked structure of colored fluid layers. By utilizing the vertical dimension between two substrates, the patent achieves full color display without occupying additional horizontal space, thus improving display resolution.
2Use of energy by moving object
If electrowetting phenomenon is used to control ink droplet, then power consumption is reduced, but display performance needs continuous improvement
Solution Approach 1:
The patent utilizes electrowetting phenomenon to change the wettability parameters of the insulating layer surface by applying voltage. This causes the colored fluid layers to spread or retract, enabling color display and grayscale control while maintaining low power consumption characteristics of electrowetting technology.
Solution Approach 2:
The patent makes a single pixel structure perform multiple functions by stacking multiple colored fluid layers that can be independently controlled. The same electrowetting mechanism controls spreading/retracting of different colored layers to achieve full color display, grayscale, and potential black display functionality.
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
Enables full color display with improved resolution by using two pixels, enhancing the efficiency and capabilities of electrowetting display technology.
Implementation Method 1
Electrowetting refers to a phenomenon where by changing the voltage between a droplet and an insulating substrate, the wettability of the droplet on the insulating substrate is changed (i.e., the contact angle is changed), such that the droplet is deformed or displaced.
Implementation Method 2
Wetting means that liquid can spread on a solid surface, and the contact area tends to increase, that is, the adhesion of the liquid to the solid surface is greater than the cohesion of the liquid.
Data Source
AI summary
A display panel, a display device, and a control method therefor are disclosed. The display panel includes a first substrate and a second substrate and a plurality of first pixels between the first substrate and the second substrate; wherein, at least one of the plurality of first pixels comprises: a first insulating layer on the first substrate; a second insulating layer on the second substrate; a first colored fluid layer contacted with and having the same hydrophilicity/hydrophobicity as that of a surface of the first insulating layer; a second colored fluid layer contacted with and having the same hydrophilicity/hydrophobicity as that of a surface of the second insulating layer; and a first transparent conductive fluid disposed between the first colored fluid layer and the second colored fluid layer and having a hydrophilicity/hydrophobicity contrary to those of the first colored fluid layer and the second colored fluid layer.