Display Panel Shield Region for Optical Leakage

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Solution Overview

Problem

Liquid crystal display (LCD) panels face issues with optical current leakage in the gate drive region, leading to reliability and service life concerns due to complex wiring and the use of amorphous-silicon semiconductor technology, which results in high risks of optical current leakage and short service life.

Innovation Solution

A display panel design featuring a polarizer with a shield region made of hyperchromic light-absorbing material, specifically a black substance comprising phenolic resin, photosensitive compounds, organic and inorganic dyes, and solvent, applied as a polarizing material layer with a refractive index of 2.0 to 3.2 and extinction coefficient of 2.7 to 3.5, which is dehydrated and carbonized to cover the gate drive region, preventing backlight illumination and thus reducing optical current leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If amorphous-silicon semiconductor technology is used in the gate drive region, then the device complexity is reduced, but optical current leakage increases and service life decreases

Engineering Contradiction:

Improvewiring complexityVSAvoidoptical current leakage risk

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

A shield layer made of hyperchromic light-absorbing material is introduced as an intermediary between the backlight and the gate drive region. This shield layer absorbs backlight before it reaches the amorphous-silicon transistors, preventing optical current leakage while allowing the use of simplified amorphous-silicon technology in the gate drive region.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful effect of backlight illumination (which causes optical current leakage) into a beneficial shielding mechanism. By using hyperchromic light-absorbing materials, the backlight's energy is absorbed and converted into heat, preventing it from reaching and damaging the gate drive transistors.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Device complexity

If the gate drive region is directly illuminated by backlight, then the structure is simplified, but reliability fails due to optical current leakage

Engineering Contradiction:

Improvestructural simplicityVSAvoidgate drive region reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The shield layer serves as a protective intermediary that blocks backlight from directly illuminating the gate drive region. This maintains structural simplicity while introducing a functional barrier that prevents optical current leakage and improves reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If a polarizer without shield region is used, then the manufacturing process is simpler, but optical current leakage occurs in the gate drive region

Engineering Contradiction:

Improvepolarizer manufacturing simplicityVSAvoidoptical current leakage

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The polarizer is segmented into two distinct regions: a light-transmitting region for the display area and a shield region made of hyperchromic light-absorbing material for the gate drive region. This segmentation allows the polarizer to simultaneously perform light transmission and optical shielding functions, preventing optical current leakage while maintaining ease of manufacture through a single integrated component.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the polarizer are given different optical properties: the display region maintains high light transmission while the gate drive region incorporates light-absorbing material. This local differentiation of material properties enables the polarizer to address optical current leakage in specific areas without compromising overall display performance.

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

The solution effectively addresses optical current leakage, enhancing the reliability and service life of the display panel by creating a shield region that absorbs light and prevents illumination of the gate drive area, thereby improving the overall performance and longevity of the LCD panel.

Implementation Method 1

a polarizer, comprising a shield region, disposed on the active switch array substrate, wherein the bezel region surrounds the display region and is located on a periphery of the display panel, the gate drive region is disposed on a periphery of the active switch array substrate, and the shield region covers the gate drive region

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS10877336B2Display panel and method for manufacturing same

Publication Date: 2020.12.29 HKC CORP LTD

AI summary

This application relates to a display panel and a method for manufacturing same. The display panel includes an active switch array substrate. The display panel includes: a display region; a bezel region, including a gate drive region and a wiring region; and a polarizer, including a shied region, disposed on the active switch array substrate. The bezel region surrounds the display region and is located on a periphery of the display panel. The gate drive region is disposed on a periphery of the active switch array substrate. The shield region covers the gate drive region.