Deflecting Structure for Uniform UV Curing in Blue-Phase LC Panels
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Solution Overview
Problem
In blue-phase liquid crystal (LC) displays with protrusion-typed electrodes, uneven UV exposure during curing treatment leads to instability and non-uniform electro-optic characteristics, affecting the dark-state performance.
Innovation Solution
A deflecting structure is introduced between the substrates in the LC panel to alter the optical paths of UV light, ensuring it passes through intermediate areas between electrodes, thereby providing uniform UV exposure and improving polymerization stability and electro-optic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If UV exposure is applied directly to the LC panel with protrusion electrodes, then the curing treatment can be performed, but the UV exposure is shielded and affected by the electrodes resulting in uneven exposure
Solution Approach 1:
The patent introduces a deflecting structure that changes the optical path of UV light from a direct vertical path to a reflected path at an angle. This dimensional change in the light path allows UV light to reach intermediate areas between electrodes that would otherwise be shielded, resolving the contradiction between achieving uniform exposure and dealing with electrode obstruction.
Solution Approach 2:
The deflecting structure acts as an intermediary element between the UV light source and the LC layer. It mediates the interaction by redirecting UV light to reach areas that would otherwise be blocked by electrodes, enabling uniform exposure without changing the electrode arrangement.
2Reliability
If uneven UV exposure occurs during curing treatment, then the LC polymerization stability and electro-optic characteristics are affected, but the dark-state performance deteriorates
Solution Approach 1:
The deflecting structure is introduced in advance to prevent uneven UV exposure before it can occur. By redirecting UV light to reach all areas uniformly during the curing process, it prevents the polymerization instability that would otherwise lead to dark-state performance deterioration.
Solution Approach 2:
The deflecting structure creates a feedback mechanism where UV light that would normally be blocked by electrodes is redirected back into the LC layer, ensuring that all areas receive adequate exposure. This feedback loop prevents polymerization defects that would harm dark-state performance.
3Adaptability or versatility
If protrusion electrodes are used in the LC panel, then the blue-phase LC can operate, but the UV exposure is shielded by the electrodes
Solution Approach 1:
The patent changes the dimension of UV light propagation from direct vertical transmission to angled reflection. This allows UV light to bypass the obstructing electrodes and reach intermediate areas, maintaining both electrode functionality and UV transmission.
Solution Approach 2:
The deflecting structure dynamically redirects UV light paths based on the electrode arrangement. By making the light path adjustable through reflection angles, the system adapts to the presence of electrodes while maintaining effective UV exposure.
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 uniform UV exposure enhances the stability and consistency of the polymer-stabilized blue-phase LC, extending the temperature range and improving the overall performance of the LC display.
Implementation Method 1
a deflecting structure disposed between the first and second substrates and configured for changing optical paths of UV light
Implementation Method 2
the mixture is exposed to UV light for the curing treatment. This is the so-called polymer-stabilized blue phase (PSBP) LC
Data Source
AI summary
This disclosure provides a LC panel and the UV curing method therein for the LC curing treatment. The LC panel includes: a first substrate with a plurality of protrusion electrodes formed thereon; a second substrate disposed on the first substrate; a LC layer interposed between the first and second substrates; and a deflecting structure disposed between the first and second substrates and configured for changing optical paths of UV light; wherein the UV light passes through the areas between the neighboring protrusion electrodes, and the deflecting structure is located in the optical paths of the UV light.