Stereoscopic Display Black Matrix Width Reduction via Segmented Stripes

Solution Overview

Problem

Conventional stereoscopic image displays face challenges in reducing the width of the black matrix, which leads to decreased aperture ratio and brightness, while also complicating the manufacturing process.

Innovation Solution

The implementation of a stereoscopic image display with first black stripes formed on the color filter substrate, corresponding to the black matrix, and a patterned retarder film bonded onto these stripes, which reduces the width of the black matrix and improves the aperture ratio and brightness by allowing for a wider vertical viewing angle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the width of black matrix is increased to maintain vertical viewing angle, then the vertical viewing angle is maintained, but the aperture ratio and brightness decrease

Engineering Contradiction:

Improvevertical viewing angleVSAvoidbrightness

Core Design Contradiction:

Stability of the object's compositionVSIllumination intensity

Solution Approach 1:

The invention divides the light-blocking function into two separate components: the black matrix (for electrical isolation) and the first black stripes (for viewing angle control). This segmentation allows each component to be optimized independently, enabling reduced black matrix width while maintaining the required vertical viewing angle through the first black stripes, thereby improving aperture ratio and brightness

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first black stripes act as an intermediary element between the black matrix and the patterned retarder film. By introducing this intermediate structure, the patent achieves precise control over the vertical viewing angle without requiring a large black matrix width, thus resolving the contradiction between viewing angle stability and brightness

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If the width of black matrix is increased to maintain vertical viewing angle, then the vertical viewing angle is maintained, but the aperture ratio decreases

Engineering Contradiction:

Improvevertical viewing angleVSAvoidaperture ratio

Core Design Contradiction:

Stability of the object's compositionVSArea of stationary object

Solution Approach 1:

The invention divides the light-blocking function into two separate components: the black matrix (for electrical isolation) and the first black stripes (for viewing angle control). This segmentation allows each component to be optimized independently, enabling reduced black matrix width while maintaining the required vertical viewing angle through the first black stripes, thereby improving aperture ratio

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention addresses the viewing angle control by adding a new structural dimension - the first black stripes positioned between the color filter substrate and the patterned retarder film. This dimensional addition provides a new degree of freedom for controlling vertical viewing angle without increasing the black matrix width, thus preserving aperture ratio

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Area of stationary object

If the width of black matrix is reduced to improve aperture ratio, then the aperture ratio improves, but the vertical viewing angle control becomes difficult

Engineering Contradiction:

Improveaperture ratioVSAvoidvertical viewing angle

Core Design Contradiction:

Area of stationary objectVSStability of the object's composition

Solution Approach 1:

The invention divides the light-blocking function into two separate components: the black matrix (for electrical isolation) and the first black stripes (for viewing angle control). This segmentation allows each component to be optimized independently, enabling reduced black matrix width while maintaining the required vertical viewing angle through the first black stripes

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention applies different functional qualities to different parts of the display structure: the black matrix provides electrical isolation with minimal width, while the first black stripes provide localized viewing angle control. This local differentiation of function allows the black matrix to be minimized for aperture ratio improvement while the first black stripes maintain vertical viewing angle stability

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 the aperture ratio and maintains a vertical viewing angle of 26 degrees while minimizing the width of the black matrix, thereby preventing a decrease in brightness and simplifying the manufacturing process.

Implementation Method 1

a patterned retarder film formed on the first black stripes

Methodology Applied

Scientific EffectRetardation: Birefringence

Data Source

PatentUS9066090B2Stereoscopic image display and method for manufacturing the same

Publication Date: 2015.06.23 LG DISPLAY CO LTD

AI summary

A stereoscopic image display and a method for manufacturing the same are provided. The stereoscopic image display comprises: a thin film transistor array substrate; a color filter substrate facing the thin film transistor array substrate, and comprising black matrix; first black stripes formed on the color filter substrate, and formed at positions corresponding to the black matrix; and a patterned retarder film formed on the first black stripes.