LCD Pixel Voltage Division for Wide Viewing Angles

Solution Overview

Problem

Conventional liquid crystal display devices face challenges in achieving sufficient viewing angle characteristics while maintaining performance, reliability, and reducing power consumption, as increasing the number of subpixels leads to decreased aperture ratio, increased manufacturing costs, and reliability issues due to increased connections.

Innovation Solution

A liquid crystal display device is designed with three or more liquid crystal elements, where the voltage applied to each element is varied using a capacitor, resistor, or other elements like transistors or diodes, allowing for improved voltage control and alignment, thereby enhancing viewing angle characteristics without increasing the number of subpixels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the number of subpixels is increased to improve viewing angle characteristics, then viewing angle is improved, but aperture ratio decreases and manufacturing cost increases

Engineering Contradiction:

Improveviewing angle characteristicsVSAvoidaperture ratio

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The pixel is divided into multiple liquid crystal elements (first, second, and third liquid crystal elements) with different alignment directions. This segmentation allows each element to contribute to different viewing angle characteristics, achieving wide viewing angle performance without increasing the total number of subpixels or decreasing aperture ratio.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each liquid crystal element within the pixel is assigned different alignment characteristics (first alignment, second alignment, third alignment) to optimize performance in different viewing directions. This local differentiation of properties enables the pixel to maintain high aperture ratio while achieving omnidirectional viewing angle improvement.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If the number of subpixels is increased to improve viewing angle characteristics, then viewing angle is improved, but power consumption increases

Engineering Contradiction:

Improveviewing angle characteristicsVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The pixel is divided into multiple liquid crystal elements (first, second, and third liquid crystal elements) with different alignment directions. This segmentation allows each element to contribute to different viewing angle characteristics, achieving wide viewing angle performance without increasing the total number of subpixels or decreasing aperture ratio.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each liquid crystal element within the pixel is assigned different alignment characteristics (first alignment, second alignment, third alignment) to optimize performance in different viewing directions. This local differentiation of properties enables the pixel to maintain high aperture ratio while achieving omnidirectional viewing angle improvement.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If the number of subpixels is increased to improve viewing angle characteristics, then viewing angle is improved, but reliability decreases due to increased connections

Engineering Contradiction:

Improveviewing angle characteristicsVSAvoidconnection reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The pixel is divided into multiple liquid crystal elements (first, second, and third liquid crystal elements) with different alignment directions. This segmentation allows each element to contribute to different viewing angle characteristics, achieving wide viewing angle performance without increasing the total number of subpixels or decreasing aperture ratio.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each liquid crystal element within the pixel is assigned different alignment characteristics (first alignment, second alignment, third alignment) to optimize performance in different viewing directions. This local differentiation of properties enables the pixel to maintain high aperture ratio while achieving omnidirectional viewing angle improvement.

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 approach maintains performance and reliability while improving viewing angle characteristics, reducing power consumption, and lowering manufacturing costs by optimizing voltage control between liquid crystal elements.

Implementation Method 1

one pixel is provided with three or more liquid crystal elements and a level of voltage which is applied is varied between the liquid crystal elements

Methodology Applied

Scientific EffectLiquid crystal voltage control: Electro-Optic Effects

Implementation Method 2

an element which divides the applied voltage is provided. Alternatively, an element which converts current into voltage or an element which converts voltage into current is provided

Methodology Applied

Scientific EffectVoltage division: Capacitance

Implementation Method 3

an element which divides the applied voltage is provided. Alternatively, an element which converts current into voltage or an element which converts voltage into current is provided

Methodology Applied

Scientific EffectElectrical resistance: Electrical Resistance

Data Source

PatentUS20240192556A1Liquid crystal display device

Publication Date: 2024.06.13 SEMICON ENERGY LAB CO LTD

AI summary

To improve viewing angle characteristics by varying voltage which is applied between liquid crystal elements. A liquid crystal display device in which one pixel is provided with three or more liquid crystal elements and the level of voltage which is applied is varied between the liquid crystal elements is varied. In order to vary the level of the voltage which is applied between the liquid crystal elements, an element which divides the applied voltage is provided. In order to vary the level of the applied voltage, a capacitor, a resistor, a transistor, or the like is used. Viewing angle characteristics can be improved by varying the level of the voltage which is applied between the liquid crystal elements.