Alternating Pixel Array Design for Display Luminance and Crosstalk

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Solution Overview

Problem

Conventional display elements with added white sub-pixels suffer from reduced aperture ratio and crosstalk issues, leading to suboptimal luminance and display quality.

Innovation Solution

A display element design featuring alternating arrays of first pixels with three primary colors and second pixels with two primary colors and a white sub-pixel, utilizing a common electrode and thin film transistors to prevent crosstalk by stabilizing the potential changes across the signal lines.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a white sub-pixel is added to sub-pixels of three primary colors, then luminance is improved and power consumption is reduced, but the aperture ratio of each sub-pixel decreases

Engineering Contradiction:

ImproveluminanceVSAvoidaperture ratio

Core Design Contradiction:

Illumination intensityVSArea of stationary object

Solution Approach 1:

The display is divided into two types of pixels: first pixels with three primary color sub-pixels and second pixels with two primary color sub-pixels plus a white sub-pixel. This segmentation allows different regions to serve different functions, optimizing both aperture ratio and luminance performance

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different pixel types are strategically placed in different regions of the display. Second pixels with white sub-pixels are positioned where high luminance is needed, while first pixels with three primary colors are placed where color accuracy is prioritized, creating local optimization of display properties

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If first pixels and second pixels are arrayed alternately in horizontal and vertical directions, then aperture ratio is secured and luminance is improved, but crosstalk easily occurs and display quality lowers

Engineering Contradiction:

ImproveluminanceVSAvoidcrosstalk

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The pixel array uses an asymmetric arrangement where second pixels are positioned at specific locations (e.g., odd-numbered rows and columns) rather than uniform alternation. This asymmetric placement reduces crosstalk by optimizing the spatial relationship between different pixel types and their corresponding switching elements

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

A common electrode is introduced as an intermediary element that helps stabilize potential changes across signal lines. The common electrode acts as a mediator between different pixel regions, reducing electromagnetic interference and crosstalk that would otherwise occur with alternating pixel arrays

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9558697B2Display device driving sub-pixels of a plurality of colors

Publication Date: 2017.01.31 MAGNOLIA WHITE CORP

AI summary

According to one embodiment, a display element includes a plurality of scanning lines and a plurality of signal lines. Into the plurality of signal lines, signals of different polarities are alternately input, respectively. In the respective regions surrounded by the scanning lines and the signal lines, a first pixel and a second pixel are arrayed. Along the scanning line, two each of the first pixels and the second pixels are provided, and the two first pixels or the two second pixels are arrayed so as to be juxtaposed to each other. Along the signal line, the first pixel and the second pixel are arrayed alternately.