Display Light-Shielding Layout for Reflection and Charge Isolation

Solution Overview

Problem

Existing display devices suffer from image quality issues due to external light reflection and charging-induced brightness in pixels, despite measures like crossed Nicols and separated light-shielding layers.

Innovation Solution

The display device incorporates light-shielding layers separated at specific locations, with different color filters stacked at these separation points to reduce light transmittance and prevent external light reflection, thereby suppressing charging-induced brightness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If light-shielding layers are connected to each other to cover the frame portion and wiring portion, then external light reflection is prevented, but charges enter pixels and pixels become bright even in black display state

Engineering Contradiction:

Improveexternal light reflectionVSAvoidcharging-induced brightness

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The light-shielding layer is divided into a first light-shielding layer covering the frame portion and a second light-shielding layer covering the wiring portion, with a separation between them. This segmentation prevents charge transfer from the frame to the pixel region while maintaining light shielding effectiveness in both areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display device are provided with different light-shielding configurations tailored to their specific needs. The frame portion receives one configuration while the wiring portion receives another, optimizing both light reflection prevention and charge isolation locally.

Inventive Principle:

Principle #3Local quality

2Object-generated harmful factors

If light-shielding layers are separated from each other to prevent charging, then pixel brightness is maintained, but external light reflection increases

Engineering Contradiction:

Improvepixel brightnessVSAvoidexternal light reflection

Core Design Contradiction:

Object-generated harmful factorsVSObject-affected harmful factors

Solution Approach 1:

The light-shielding layer is divided into a first light-shielding layer covering the frame portion and a second light-shielding layer covering the wiring portion, with a separation between them. This segmentation prevents charge transfer from the frame to the pixel region while maintaining light shielding effectiveness in both areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display device are provided with different light-shielding configurations tailored to their specific needs. The frame portion receives one configuration while the wiring portion receives another, optimizing both light reflection prevention and charge isolation locally.

Inventive Principle:

Principle #3Local quality

3Object-generated harmful factors

If crossed Nicols are used to suppress charging, then pixel brightness is reduced, but external light reflection is not sufficiently prevented

Engineering Contradiction:

Improvepixel brightnessVSAvoidexternal light reflection

Core Design Contradiction:

Object-generated harmful factorsVSObject-affected harmful factors

Solution Approach 1:

The light-shielding layer is divided into a first light-shielding layer covering the frame portion and a second light-shielding layer covering the wiring portion, with a separation between them. This segmentation prevents charge transfer from the frame to the pixel region while maintaining light shielding effectiveness in both areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display device are provided with different light-shielding configurations tailored to their specific needs. The frame portion receives one configuration while the wiring portion receives another, optimizing both light reflection prevention and charge isolation locally.

Inventive Principle:

Principle #3Local quality

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 image quality by minimizing visible reflections and maintaining pixel brightness, resulting in a higher quality display.

Implementation Method 1

the frame portion and the wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section

Methodology Applied

Scientific EffectLight shielding: Absorption (EM radiation)

Implementation Method 2

a plurality of color filters having different colors are stacked at the separation location

Methodology Applied

Scientific EffectColor filtering: Absorption (EM radiation)

Data Source

PatentUS12493222B2Display device, method of manufacturing the same, and electronic device

Publication Date: 2025.12.09 MAGNOLIA WHITE CORP

AI summary

A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.