Dual View Optical Film Microstructure for Brightness and Crosstalk Control

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Solution Overview

Problem

Existing optical film microstructures for dual view liquid crystal display modules fail to effectively enhance brightness at different angles, leading to poor dual view effects and increased costs due to the need for additional dual brightness enhancement films, which also worsen crosstalk issues.

Innovation Solution

A right-and-left symmetric microstructure for the optical film, featuring left and right peaks on a substrate with specific reflecting and light-emerging surfaces, designed to enhance brightness in valid view angles while suppressing brightness in the intermediate crosstalk region, thereby improving the dual view effect without additional films.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If existing optical film microstructures are used for dual view liquid crystal display modules, then the structure is simple, but the brightness enhancement at different angles is insufficient and crosstalk issues worsen

Engineering Contradiction:

Improvebrightness enhancement at different anglesVSAvoidcrosstalk issues

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The optical film is divided into multiple independent microprism structures arranged in an alternating pattern. Each microprism unit operates independently to control light in specific directions, enabling separate optimization of left and right view brightness while preventing crosstalk between views.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the optical film have different microprism configurations optimized for specific viewing angles. The microprisms are designed with varying orientations and dimensions to locally enhance brightness in valid view angles while suppressing light in crosstalk regions, achieving spatially selective optical control.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If additional dual brightness enhancement films are added to improve dual view effect, then brightness enhancement improves, but device complexity and costs increase

Engineering Contradiction:

Improvedual view brightness enhancementVSAvoidnumber of additional films

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The optical film integrates multiple functions into a single component: it provides brightness enhancement for dual view display, controls viewing angles, and suppresses crosstalk simultaneously. The alternating microprism structure achieves what would otherwise require multiple separate films, simplifying the overall device structure while maintaining enhanced dual view performance.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Use of energy by moving object

If traditional optical film structures are used, then manufacturing is simple, but light utilization efficiency is low

Engineering Contradiction:

Improvelight utilization efficiencyVSAvoidmanufacturing complexity

Core Design Contradiction:

Use of energy by moving objectVSEase of manufacture

Solution Approach 1:

The microprism structures utilize curved refractive surfaces to efficiently redirect light rays. The curved geometry of the microprisms enables effective light manipulation through refraction, maximizing light utilization efficiency while maintaining compatibility with conventional manufacturing processes for optical films.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 microstructure achieves significant brightness enhancement in the valid left and right view regions, maximizing the utilization of light and reducing the impact of the intermediate crosstalk region, resulting in a superior dual view effect without the need for additional brightness enhancement films.

Implementation Method 1

the left peak has a reflecting surface on a side of the tip of the left peak which is close to the right peak

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

the parallel light keeps parallel after exiting from the light-emerging surface

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS11269128B2Microstructure for dual view display and optical film and liquid crystal display module using the same

Publication Date: 2022.03.08 BOE TECHNOLOGY GROUP CO LTD

AI summary

The disclosure provides a microstructure for dual view display and an optical film and a liquid crystal display module using the same. The microstructure for dual view display includes a substrate; a left peak and a right peak formed on the substrate, wherein the left peak and the right peak exhibit right-and-left symmetry, the tip of the left peak is inclined in a direction away from the tip of the right peak relative to the bottom of the left peak, and the tip of the right peak is inclined in a direction away from the tip of the left peak relative to the bottom of the right peak, the left peak has a reflecting surface on a side of the tip of the left peak which is close to the right peak and a light-emerging surface on a side of the tip of left peak which is away from the right peak, and the right peak has a reflecting surface on a side of the tip of the right peak which is close to the left peak and a light-emerging surface on a side of the tip of right peak which is away from the left peak.