Electro-Optical Device Multiple Amplifier Pixel Column

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Solution Overview

Problem

Existing electro-optical devices face issues with luminance unevenness due to variance in data voltages output from amplifiers, leading to deteriorated image quality.

Innovation Solution

The electro-optical device employs a structure where data voltages are output from multiple amplifiers to a single pixel column, ensuring that each pixel portion receives voltages from at least two different output circuits, thereby reducing luminance variance between pixel columns and minimizing display unevenness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If data voltages are output from multiple amplifiers to a single pixel column, then display unevenness is reduced and image quality is improved, but device complexity increases

Engineering Contradiction:

Improvedisplay uniformityVSAvoidcircuit structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The pixel columns are divided into first and second pixel columns, with each column receiving data voltages from different amplifiers. This segmentation allows the system to distribute voltage variance across multiple independent channels, reducing overall display unevenness while maintaining manageable circuit complexity through modular organization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different amplifiers are assigned to different spatial regions (first and second pixel columns), allowing each amplifier to be optimized for its specific region. This local quality approach ensures that voltage characteristics are tailored to specific areas, improving overall display uniformity without requiring complete redesign of the entire circuit system.

Inventive Principle:

Principle #3Local quality

2Device complexity

If a single pixel column is supplied with data voltage from only a single output circuit, then device complexity is reduced, but luminance variance between pixel columns occurs causing line-shaped display unevenness

Engineering Contradiction:

Improvecircuit structureVSAvoidluminance uniformity

Core Design Contradiction:

Device complexityVSIllumination intensity

Solution Approach 1:

Multiple amplifiers are combined to serve a single pixel column, with first and second amplifiers both providing data voltages to the same column. This merging approach averages out voltage variance across amplifiers, eliminating luminance variance between pixel columns and preventing line-shaped display unevenness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system changes the voltage supply parameter by providing data voltages from multiple amplifiers with different voltage characteristics to the same pixel column. This parameter diversification compensates for individual amplifier variations, ensuring uniform luminance across all pixel columns without requiring complex calibration circuits.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS8547304B2Electro-optical device, driving method of electro-optical device, and electronic apparatus

Publication Date: 2013.10.01 138 EAST LCD ADVANCEMENTS LTD

AI summary

An electro-optical device includes a pixel column, a first and second data lines, and a first and second output circuits. The pixel column including pixel portions are arranged in a first direction. The first and second data lines extend in the first direction. The first and second output circuits output data voltages to different pixel portions of the pixel column through the first and second data lines, respectively.