Divisional Light Blocking Section Reduces Black Matrix Visibility

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Solution Overview

Problem

In liquid crystal display devices used in head-mounted displays, the black matrix between pixels is magnified and visible as a mesh-shaped black display section, degrading image quality.

Innovation Solution

The introduction of divisional light blocking sections that divide pixel sections into multiple sub-pixels, allowing independent operation and reducing the visibility of the black matrix, thereby enhancing display quality without increasing the actual pixel definition.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the black matrix is disposed between pixels to define pixel sections, then independent display operation of pixel sections is achieved, but the black matrix becomes visible as a mesh-shaped black display section when images are magnified

Engineering Contradiction:

Improveindependent display operationVSAvoidvisibility of black matrix

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The pixel section is divided into multiple divided pixels (first divided pixel and second divided pixel) by introducing a divisional light blocking section. This segmentation creates additional boundaries that distract from the main black matrix, reducing its visibility while maintaining independent display operation of each pixel section.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If the actual pixel density is increased to reduce the visibility of the black matrix, then display quality is improved, but manufacturing complexity and costs increase

Engineering Contradiction:

Improvevisibility of black matrixVSAvoidpixel density

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The invention creates a visual copy effect by dividing each pixel section into multiple divided pixels. This pseudo-definition improvement gives the appearance of higher pixel density without actually increasing the physical pixel count, thereby reducing the visibility of the black matrix while avoiding the complexity and costs associated with actual high-density pixel manufacturing.

Inventive Principle:

Principle #26Copying

3Manufacturing precision

If the pixel section is divided into multiple divided pixels, then the perceived definition is improved, but the aperture ratio of the pixel section is reduced

Engineering Contradiction:

Improveperceived definitionVSAvoidaperture ratio

Core Design Contradiction:

Manufacturing precisionVSArea of stationary object

Solution Approach 1:

The divisional light blocking section is strategically positioned within the pixel section to divide it into multiple divided pixels. The design optimizes the placement and dimensions of these divisions to achieve the desired perceived definition improvement while minimizing the impact on the overall aperture ratio, balancing visual quality with light transmission efficiency.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10845657B2Display device and head-mounted display

Publication Date: 2020.11.24 SHARP KK

AI summary

A liquid crystal panel (a display device) 10 includes pixel sections PX, a black matrix (a pixel in-between light blocking section) 10i disposed to define each of the pixel sections PX that are adjacent to each other, TFTs (switching components) 11 connected to the pixel sections PX and configured to drive the pixel sections PX, respectively, and a divisional light, blocking section 22 disposed to divide the pixel section PX into divided pixels PPX.