Electro-optical Device Light-Shielding Island for Color Shift Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electro-optical devices with light-emitting elements, such as organic electroluminescence (EL) elements, face issues with differences in light distribution characteristics between red (R), green (G), and blue (B) pixels due to the arrangement of color filters, leading to color shift and degradation in color gamut when the visual field angle changes.
Innovation Solution
The electro-optical device incorporates a light-shielding portion in an island shape that blocks specific wavelengths of light, reducing the impact of light distribution differences between adjacent sub-pixels, and a control unit to manage the operation of the device, ensuring consistent color output across varying angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If color filters of different colors are alternately aligned in rows of R and G pixels, then color filter arrangement efficiency is improved, but light distribution characteristics become inconsistent between different pixel types
Solution Approach 1:
The patent introduces a light-shielding portion with specific optical properties (light-shielding capability) at specific locations (between adjacent sub-pixels of different colors) to create local modification of light distribution. This allows different parts of the display to have different light distribution characteristics, compensating for the inconsistency caused by alternating color filter arrangement.
2Reliability
If color filters are integrally provided in rows of B pixels, then light distribution consistency is improved, but color filter arrangement efficiency deteriorates
Solution Approach 1:
The light-shielding portion acts as an intermediary element introduced between adjacent sub-pixels of different colors. It mediates the light interaction between these sub-pixels, preventing cross-color light interference and ensuring that B pixels maintain their light distribution consistency while allowing efficient alternating arrangement of color filters.
3Adaptability or versatility
If alternating arrangement of R, G, and B pixels is implemented, then color display capability is improved, but color shift at different visual field angles increases
Solution Approach 1:
The light-shielding portion is positioned in advance to prevent light from adjacent sub-pixels of different colors from reaching the viewer's eye at oblique angles. By blocking this cross-color light interference before it can cause color shift, the patent maintains color consistency across different visual field angles while preserving the alternating pixel arrangement for color display.
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
This configuration enhances color consistency and reduces color shift at different visual field angles, thereby improving the color gamut and visual field angle characteristics of the electro-optical device.
Implementation Method 1
a light-shielding portion including a first light-shielding portion that is provided in an island shape so as to divide the third light-emitting region into two portions along the first direction in the plan view and that is configured to block at least the light in the third wavelength range
Implementation Method 2
a first coloring layer that is provided overlapping the first light-emitting region in plan view and that is configured to transmit the light in the first wavelength range
Implementation Method 3
a second coloring layer that is provided overlapping the second light-emitting region in plan view and that is configured to transmit the light in the second wavelength range
Implementation Method 4
a third coloring layer that is provided overlapping the third light-emitting region in a plan view and that is configured to transmit the light in the third wavelength range
Data Source
AI summary
An electro-optical device includes: a first light-emitting region that emits light in a first wavelength range; a second light-emitting region disposed at a position adjacent to the first light-emitting region in a first direction and that emits light in a second wavelength range; a third light-emitting region disposed at a position adjacent to the first light-emitting region in a second direction and that emits light in a third wavelength range; a fourth light-emitting region disposed at a position adjacent to the second light-emitting region in the second direction and that emits light in a third wavelength range; a first coloring layer provided overlapping the first light-emitting region; a second coloring layer provided overlapping the second light-emitting region; a third coloring layer provided overlapping the third and fourth light-emitting regions; and a light-shielding portion including a first light-shielding portion provided in an island shape to overlap a region between the third and fourth light-emitting regions and that blocks at least the light in the third wavelength range.