Alternating Pixel Sub-Pixel Configurations for Wearable Display Power

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Liquid crystal display screens in wearable devices face challenges in achieving high transmittance/reflectance while maintaining full color brightness, as current methods reduce power consumption but result in a washout phenomenon due to inadequate gray level control and excessive white sub-pixels.

Innovation Solution

The display apparatus incorporates alternately disposed first and second pixel units with specific configurations of red, green, blue, and white sub-pixels, along with a display control method that adjusts gray levels to optimize color display, ensuring the fourth color sub-pixels are scattered to maintain color balance and reduce power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by stationary object

If white sub-pixels are added to improve transmittance and reduce power consumption, then power consumption is reduced and transmittance is improved, but precise gray level control is lost and full color brightness is reduced

Engineering Contradiction:

Improvepower consumptionVSAvoidgray level control precision

Core Design Contradiction:

Use of energy by stationary objectVSManufacturing precision

Solution Approach 1:

The pixel structure is segmented into multiple color sub-pixels (red, green, blue, and white) arranged in specific configurations. This segmentation allows independent control of each color component, enabling precise gray level control while maintaining high transmittance through the white sub-pixels.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display (first pixel units vs. second pixel units) have different local compositions of color sub-pixels. The first pixel units have a greater proportion of white sub-pixels for high transmittance areas, while the second pixel units have more color sub-pixels for color accuracy areas, achieving both high transmittance and precise gray level control in different locations.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If white sub-pixels are added to increase transmittance, then transmittance is improved, but full color brightness is reduced due to excessive white sub-pixel proportion

Engineering Contradiction:

ImprovetransmittanceVSAvoidfull color brightness

Core Design Contradiction:

Illumination intensityVSQuantity of substance

Solution Approach 1:

The display employs different local compositions of color sub-pixels in different pixel units. First pixel units have a greater proportion of white sub-pixels for high transmittance, while second pixel units have more color sub-pixels (red, green, blue) to maintain full color brightness. This local differentiation allows the overall display to achieve both high transmittance and full color brightness.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The pixel array is segmented into first pixel units and second pixel units with different color sub-pixel configurations. This segmentation allows the display to distribute white sub-pixels and color sub-pixels in different regions, ensuring that high transmittance and full color brightness are achieved in their respective optimal locations without compromising the other.

Inventive Principle:

Principle #1Segmentation

3Use of energy by stationary object

If white sub-pixels are increased to reduce power consumption, then power consumption is reduced, but a washout phenomenon of overall colors occurs

Engineering Contradiction:

Improvepower consumptionVSAvoidwashout phenomenon

Core Design Contradiction:

Use of energy by stationary objectVSObject-generated harmful factors

Solution Approach 1:

Different pixel units have different local compositions of color sub-pixels to prevent the washout phenomenon. First pixel units with more white sub-pixels are strategically placed where high transmittance is needed, while second pixel units with more color sub-pixels are placed where color accuracy is critical. This local differentiation ensures that color washout is avoided in regions where color fidelity is important.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The display is segmented into first pixel units and second pixel units with different color sub-pixel ratios. This segmentation allows the system to control the distribution of white and color sub-pixels across different regions, preventing the uniform overuse of white sub-pixels that causes color washout while still achieving power savings in appropriate areas.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS10157583B2Display apparatus and display control method thereof

Publication Date: 2018.12.18 AU OPTRONICS CORP

AI summary

A display apparatus includes a plurality of first pixel units and a plurality of second pixel units. Each of the first pixel units includes at least one first color sub-pixel, at least one second color sub-pixel, at least one third color sub-pixel and at least one fourth color sub-pixel arranged in a first configuration. Each of the second pixel units includes the at least one first color sub-pixel, the at least one second color sub-pixel, the at least one third color sub-pixel and the at least one fourth color sub-pixel arranged in a second configuration different from the first configuration. The first pixel units and the second pixel units are alternately disposed to make all of the pixel units adjacent to each of the first pixel units be the second pixel units, and all of the pixel units adjacent to each of the second pixel units be the first pixel units.