Liquid Crystal Display With Varying Light Shield Widths

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Solution Overview

Problem

Liquid Crystal Displays (LCDs) face challenges in maintaining contrast while increasing the number of color elements, leading to reduced contrast and visibility issues due to the narrow viewing angle and light shielding effects.

Innovation Solution

The LCD design incorporates varying widths of light shields around color element regions, with a larger second light shield surrounding a smaller second color element region, allowing for balanced light intensity and reduced light interference between color elements, thereby maintaining color reproducibility and contrast.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the number of color elements is increased to improve color reproducibility, then color reproducibility is improved, but contrast is reduced

Engineering Contradiction:
Improvecolor reproducibilityVSAvoidcontrast
Core Design Contradiction:
Measurement precisionVSIllumination intensity

Solution Approach 1:

The patent applies local quality by making the light shield width vary depending on the color element region. Specifically, the light shield width is set to be different for different color elements (e.g., wider for certain color elements, narrower for others), allowing optimized light shielding for each region while maintaining overall contrast and color reproducibility.

Inventive Principle:
Principle #3Local quality

2Ease of manufacture

If a uniform light shield is used around all color element regions, then manufacturing is simplified, but visibility is reduced due to light interference

Engineering Contradiction:
Improvelight shield fabricationVSAvoidvisibility
Core Design Contradiction:
Ease of manufactureVSIllumination intensity

Solution Approach 1:

The patent implements local quality by varying the light shield width according to the specific color element region. Each color element region receives a customized light shield width that is optimized for its particular characteristics, thereby improving visibility while maintaining manageable manufacturing complexity through systematic variation rather than complete customization.

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 visibility and display performance by adjusting light intensity and reducing contrast loss, even with increased color elements, while maintaining excellent color reproducibility.

Implementation Method 1

a liquid crystal interposed between the first and second substrates

Methodology Applied
Scientific EffectLiquid crystal effect: Liquid Crystals

Data Source

PatentUS7800717B2Liquid crystal display and electronic apparatus
Publication Date: 2010.09.21 SEIKO EPSON CORP
  • US7800717B2 patent drawing
  • US7800717B2 patent drawing
  • US7800717B2 patent drawing

AI summary

A liquid crystal display includes a first substrate, a second substrate disposed in a position opposite to the first substrate, a liquid crystal interposed between the first and second substrates, a plurality of color element regions provided on the second substrate, and a light shield formed so as to surround the color element regions. A width of the light shield varying depending on the color element region.