Liquid Crystal Display Waveguide Insulator for Light Utilization
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Solution Overview
Problem
Existing liquid crystal display devices face challenges in suppressing light deviation from opening regions, leading to inefficient light utilization and potential irradiation of semiconductor elements, which requires a complex structure to manage.
Innovation Solution
A simple structure incorporating a light shielding member and a high refractive index insulator as a waveguide is provided along the edge of the pixel electrode, reflecting and propagating incident light within the insulator to prevent deviation and irradiation, enhancing light utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a complex structure with multiple concave portions and transparent films is used to suppress light deviation, then light utilization efficiency is improved, but device complexity increases
Solution Approach 1:
The invention extracts the essential function of light guidance by providing only a simple light shielding member with a specific refractive index relationship to the surrounding insulating films. This eliminates the need for complex multi-layer concave structures while maintaining the core function of preventing light deviation from the opening region.
Solution Approach 2:
The invention changes the refractive index parameter of the light shielding member to be higher than that of the first interlayer insulating film. This parameter change enables the light shielding member to function as an effective light guide, directing incident light back into the opening region without requiring complex geometric structures.
2Reliability
If light shielding structures are added to prevent light irradiation to semiconductor elements, then reliability is improved, but device complexity increases
Solution Approach 1:
The invention merges the light shielding function with the existing light shielding member structure. By making the light shielding member have a refractive index higher than the first interlayer insulating film, the same structure simultaneously achieves light guidance and protection of semiconductor elements, eliminating the need for separate protective structures.
3Loss of energy
If multiple insulating layers with different refractive indices are introduced to guide light, then light utilization efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The invention applies local quality by providing the light shielding member with a specific refractive index property (higher than the first interlayer insulating film) only where needed at the opening region interface. This localized property change enables effective light guidance without requiring multiple insulating layers throughout the entire device structure.
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 suppresses light deviation from the opening region, improving light utilization efficiency and preventing irradiation of semiconductor elements, while simplifying the structure compared to existing methods.
Implementation Method 1
the second insulator configures a waveguide which reflects incident light incident on the opening region at an interface between the second insulator and the first insulator, and propagates the incident light inside the second insulator
Data Source
AI summary
An electro-optical device includes a pixel electrode, a light shielding member disposed along an edge of the pixel electrode in a planar view viewed in a thickness direction that is a direction perpendicular to the pixel electrode, a first insulator that is provided in a region overlapped with at least the light shielding member in the planar view, and having light transmission, and a second insulator that is provided to be in contact with the first insulator on an opening region that is an inside surrounded by the light shielding member in the planar view, and having the light transmission and a refractive index higher than that of the first insulator, in which the second insulator configures a waveguide which reflects incident light incident on the opening region at an interface between the second insulator and the first insulator, and propagates the incident light inside the second insulator.