Movable Color Selector Layer for Display Resolution Enhancement

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional emissive displays face challenges in reproducing colors with wavelengths outside the range of red and blue sub-pixels, often requiring additional sub-pixels that increase pixel size and reduce resolution.

Innovation Solution

A display device with a light-emitting layer and a color selector layer, where the color selector layer is moved relative to the light-emitting layer to position different color selectors over fixed light-emitting regions, allowing for spatial, linear temporal, and circular sub-pixel averaging, enabling the emission of a range of colors without increasing pixel size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If additional sub-pixels are used to reproduce colors outside the red-blue wavelength range, then color gamut is improved, but pixel size increases and resolution decreases

Engineering Contradiction:

Improvecolor gamutVSAvoidresolution

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies the dynamics principle by making the color selector layer movable relative to the light-emitting layer. Instead of using additional fixed sub-pixels to expand color gamut, the system dynamically repositions color selectors (red, green, blue, yellow) across the display area to sequentially illuminate different wavelength ranges. This temporal multiplexing allows a single pixel location to emit multiple colors over time, expanding color gamut without increasing spatial pixel density or reducing resolution.

Inventive Principle:

Principle #15Dynamics

2Manufacturing precision

If sub-pixel size is reduced to increase resolution, then resolution is improved, but the ability to reproduce colors outside red-blue range is worsened

Engineering Contradiction:

ImproveresolutionVSAvoidcolor reproduction range

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The patent transitions from a purely spatial arrangement of sub-pixels to a spatio-temporal arrangement by introducing temporal dimension through the movable color selector layer. The color selectors are positioned at different locations and times to illuminate the same pixel, effectively adding a time dimension to color reproduction. This allows the display to achieve extended color gamut (including wavelengths beyond red and blue) while maintaining high spatial resolution through sub-pixel averaging techniques.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If multiple color selectors are positioned at each pixel location, then color gamut is improved, but device complexity increases

Engineering Contradiction:

Improvecolor gamutVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a single movable color selector layer that serves multiple functions: it sequentially presents different color selectors (red, green, blue, yellow) to the same pixel location at different times. This single multi-functional layer replaces what would otherwise require multiple fixed sub-pixel structures, thereby expanding color gamut while actually reducing device complexity compared to having all color selectors simultaneously present at each pixel.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 enhances color reproduction by allowing each sub-pixel location to emit multiple colors, increasing the display's color gamut without sacrificing resolution, and can be achieved through linear or circular translation of the color selector layer.

Implementation Method 1

spatial, linear temporal, and circular sub-pixel averaging

Methodology Applied

Scientific EffectSpatial averaging:

Implementation Method 2

spatial, linear temporal, and circular sub-pixel averaging

Methodology Applied

Scientific EffectTemporal averaging:

Implementation Method 3

at least one of the color selectors may include at least one of a pigmented material or a dichroic band-pass filter

Methodology Applied

Scientific EffectColor filtering: Filter (optical)

Implementation Method 4

at least one of the color selectors may include at least one of a phosphor

Methodology Applied

Scientific EffectPhosphorescence: Phosphorescence

Implementation Method 5

at least one of the color selectors may include at least one of a phosphor, a quantum dot, or a metallic nanoparticle

Methodology Applied

Scientific EffectQuantum dot emission:

Data Source

PatentUS10665149B2Translating color selector layer for display resolution enhancement

Publication Date: 2020.05.26 META PLATFORMS TECHNOLOGIES LLC

AI summary

A display device may include (1) a light-emitting layer having a plurality of light-emitting regions, with at least some of the light-emitting regions operable to emit a varying, controlled intensity of light at a fixed location, (2) a color selector layer disposed over the plurality of light-emitting regions, the color selector layer having at least one group of color selectors, and (3) an actuator operable to move the color selector layer relative to the light-emitting layer. The movement of the color selector layer may result in each color selector of the at least one group of color selectors passing each fixed location. Various other apparatus, systems, and methods are also disclosed.