Microdisplay LCD Columnar Electrodes for In-Plane Field Control
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Solution Overview
Problem
Conventional liquid crystal displays for micro display devices require complex processes and structures for alignment layers and vertical electric field driving methods, limiting response speed and causing issues like surface roughness and self-light loss.
Innovation Solution
A liquid crystal display device for micro display devices that eliminates the need for alignment layers and vertical electric field driving methods by using a pixel driving circuit with columnar electrodes and intermetallic dielectrics, allowing arbitrary electric field directions and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If vertical electric field driving method and alignment layers are used, then liquid crystal molecules can be aligned, but response speed is limited and surface roughness occurs
Solution Approach 1:
The patent removes the alignment layer structure from the liquid crystal display device. Instead of using traditional alignment layers to control liquid crystal molecule orientation, the invention applies electric fields directly to the liquid crystal molecules through transparent electrodes, enabling the molecules to align according to the electric field direction without requiring complex alignment layer structures.
Solution Approach 2:
The patent replaces the mechanical alignment layer system with an electric field-based control system. Rather than relying on physical alignment layers to dictate liquid crystal molecule orientation, the invention uses electric fields generated by voltage application to directly control molecule alignment, thereby improving response speed and eliminating surface roughness issues associated with alignment layers.
2Reliability
If alignment layers and ITO layers are used, then liquid crystal display structure is complete, but manufacturing process becomes complex and adhesion issues occur
Solution Approach 1:
The patent combines the functions of ITO layers and alignment layers into a single integrated electrode structure. The transparent electrodes serve both as electrical conductors and as surfaces that interact with liquid crystal molecules, eliminating the need for separate ITO and alignment layer deposits and thereby simplifying the manufacturing process while maintaining adhesion between substrates.
Solution Approach 2:
The transparent electrode structure in the patent performs multiple functions simultaneously: it serves as an electrical conductor for applying voltage, as a surface for liquid crystal molecule interaction, and as a structural component for adhesion. This multi-functionality reduces the number of manufacturing steps and eliminates adhesion issues that arise from multiple layer interfaces.
3Illumination intensity
If conventional liquid crystal display structure is used, then display function is achieved, but surface degradation and self-light loss occur
Solution Approach 1:
The patent removes alignment layers from the display structure, which eliminates surface roughness and prevents surface degradation. By using direct electric field control through transparent electrodes, the invention maintains display functionality while avoiding the surface-related issues that cause self-light loss and degradation in conventional structures.
Solution Approach 2:
The patent employs transparent conductive materials that combine optical transparency with electrical conductivity in a single layer. This composite material approach eliminates the need for separate ITO and alignment layers, reducing the number of interfaces where light loss and surface degradation can occur, thereby improving overall display performance.
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
Enhances response speed, prevents surface degradation, and improves adhesion between substrates by using columnar electrodes, while eliminating the need for ITO layers and alignment films.
Implementation Method 1
a liquid crystal display (LCD), an organic light emitting diode (OLED) display, etc. The LCD is a device that displays a desired image by applying an electric field to a liquid crystal material having an anisotropic dielectric constant injected between two substrates and controlling the intensity of the electric field and the amount of light transmitted through the substrate.
Implementation Method 2
Liquid crystal molecules each have a thin and elongated structure, and the dielectric constants and light transmission properties of the liquid crystal molecules differ depending on a direction of the liquid crystal molecules.
Implementation Method 3
The liquid crystal molecules each have a thin and elongated structure, and the dielectric constants and light transmission properties of the liquid crystal molecules differ depending on a direction of the liquid crystal molecules. When an electric field is applied to the liquid crystal molecules to change the arrangement of the liquid crystal molecules, a light transmission state changes in the arrangement direction due to the light transmission properties of the liquid crystal molecules, thereby displaying an image.
Data Source
AI summary
The present invention discloses a liquid crystal display of a micro display device and a manufacturing method thereof. The device includes: a pixel driving circuit output electrode body in which a pixel circuit output voltage unit, a first columnar electrode, and a first layer electrode are sequentially stacked; a first intermetallic dielectric covering a side surface of the pixel driving circuit output electrode body; a third intermetallic dielectric stacked on a top surface of the first intermetallic dielectric and a top surface of the pattern; a second columnar electrode connected to a top surface of the first layer electrode through penetrating the third intermetallic dielectric; and a protective film stacked on a top surface of the second columnar electrode and a top surface of the third intermetallic dielectric. Also, as column-shaped or point-shaped electrodes are used instead of flat electrodes to implement arbitrary electric fields, the direction of the horizontal electric field is arbitrarily designated. This prevents a problem of flat electrodes in which the desired electric field is weakened or not formed.