Monochrome Display Sub-Pixel Segmentation for Contrast and Resolution

Solution Overview

Problem

Monochrome light emitting display devices face challenges in achieving high contrast ratio and resolution while preventing color shift, as existing technologies rely on liquid crystal displays without color filters, leading to deteriorated contrast and color shift issues.

Innovation Solution

A monochrome light emitting display device with a display panel comprising unit pixels of first and second sub-pixels arranged in a matrix, driven by gate and data drivers, and controlled by a timing controller, where the sub-pixels are designed without color filters, allowing for independent light emission control to enhance contrast and resolution without color shift.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If red, green and blue color filters are removed from liquid crystal display device to achieve monochrome display, then device complexity is reduced, but contrast ratio is deteriorated and color shift is caused

Engineering Contradiction:

Improvestructure complexityVSAvoidcontrast ratio

Core Design Contradiction:

Device complexityVSIllumination intensity

Solution Approach 1:

The pixel structure is divided into first and second sub-pixels with different aperture ratios within the same unit pixel. This segmentation allows independent control of light transmission for each sub-pixel, enabling high contrast monochrome display without color filters while maintaining structural simplicity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions (first and second sub-pixels) within the same unit pixel are assigned different aperture ratios to optimize local light transmission characteristics. This local differentiation enables high contrast ratio and resolution while preventing color shift, achieving monochrome display without complex color filter structures

Inventive Principle:

Principle #3Local quality

2Device complexity

If red, green and blue color filters are removed from liquid crystal display device to achieve monochrome display, then device complexity is reduced, but color accuracy is deteriorated due to color shift

Engineering Contradiction:

Improvestructure complexityVSAvoidcolor accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The pixel structure is divided into first and second sub-pixels with different aperture ratios within the same unit pixel. This segmentation allows independent control of light transmission for each sub-pixel, enabling high contrast monochrome display without color filters while maintaining structural simplicity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The aperture ratio parameter is varied between first and second sub-pixels within the same unit pixel. By changing this physical parameter locally, the invention achieves precise luminance control for monochrome display without color filters, eliminating color shift while maintaining simple structure

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If traditional monochrome liquid crystal display device is used to achieve simple structure, then ease of manufacture is improved, but resolution is deteriorated

Engineering Contradiction:

Improvefabrication simplicityVSAvoidresolution

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The pixel structure is divided into first and second sub-pixels with different aperture ratios within the same unit pixel. This segmentation allows independent control of light transmission for each sub-pixel, enabling high contrast monochrome display without color filters while maintaining structural simplicity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention optimizes the aperture ratio dimension within unit pixels by creating first and second sub-pixels with different aperture ratios. This dimensional optimization enables high resolution monochrome display without requiring complex multi-color filter structures, maintaining fabrication simplicity while improving resolution

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS8890899B2Monochrome light emitting display device and method for fabricating the same

Publication Date: 2014.11.18 LG DISPLAY CO LTD

AI summary

A monochrome light emitting display device and a method for fabricating the same are disclosed, in which a pixel structure of a monochrome light emitting display device is changed to improve a contrast ratio and resolution and at the same time color shift is prevented from occurring, so as to display clearer image. The monochrome light emitting display device comprises a display panel having unit pixels of first and second sub-pixels arranged in a matrix arrangement to display a monochrome image; gate and data drivers respectively driving gate lines and data lines of the display panel; and a timing controller aligning externally input RGB data to be suitable for driving of the display panel to supply the RGB data to the data driver and generating data and gate control signals to control the data and gate drivers.