Protrusion Electrode Pattern for Blue Phase Liquid Crystal Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices using blue phase liquid crystals face challenges with high driving voltage and light transmittance due to the difficulty in accurately forming protruded electrodes, which affects the strength of the horizontal electric field.
Innovation Solution
A display device with a protrusion electrode pattern made of conductive polymer material is formed on a substrate, connected to thin film transistors, to generate a strong horizontal electric field, reducing driving voltage and improving light transmittance by precise alignment and manufacturing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a protruded electrode is formed to generate a strong horizontal electric field, then driving voltage is lowered, but manufacturing precision deteriorates due to difficulty in accurately aligning the electrode
Solution Approach 1:
A protrusion pattern is formed on the substrate before forming the electrode. This preliminary structure serves as a template that guides the electrode formation process, ensuring the electrode is automatically positioned with high precision on the protrusion. The electrode is then formed to cover the protrusion pattern, which inherently aligns the electrode accurately without requiring complex alignment procedures.
Solution Approach 2:
The protrusion pattern acts as an intermediary element between the substrate and the electrode. It mediates the positioning relationship by providing a physical structure that the electrode can be formed upon, thereby ensuring precise alignment. The protrusion pattern transfers the alignment information from the substrate to the electrode, solving the alignment precision problem.
2Speed
If blue phase liquid crystal is used to achieve fast response speed, then response speed improves, but driving voltage increases
Solution Approach 1:
Instead of applying the electric field in the conventional vertical direction (perpendicular to substrates), the invention applies the electric field in the horizontal direction (parallel to substrates) by using protruded electrodes. This dimensional change in electric field application allows blue phase liquid crystal to be driven at lower voltages while maintaining fast response characteristics.
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 effectively decreases driving voltage while maintaining or improving light transmittance by creating a stable and strong horizontal electric field through the protrusion electrode pattern, addressing the limitations of existing blue phase liquid crystal display devices.
Implementation Method 1
An electric field is applied to the blue phase liquid crystal, it has optical anisotropy and birefringence
Implementation Method 2
it has optical anisotropy and birefringence
Implementation Method 3
The protrusion electrode pattern is made of a conductive polymer material
Implementation Method 4
When an electric field does not exist, blue phase liquid crystal has optical isotropy, exhibits a blue phase, and does not have birefringence. In this state, if an electric field is applied to the blue phase liquid crystal, it has optical anisotropy and birefringence
Data Source
AI summary
A display device includes a first substrate including a protrusion electrode pattern, a second substrate disposed opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The protrusion electrode pattern is made of a conductive polymer material, and a state of the liquid crystal layer changes from an isotropic state to an anisotropic state when an electric field is applied.