Polarization-Dependent Image Offset for VR Display Resolution

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Current virtual reality head-mounted display devices suffer from severe screen-door effects due to low angular resolution, which is below human-eye acuity, and increasing pixel density is challenging, especially for mass production, as it often compromises optical efficiency and results in image blurs or increased light loss.

Innovation Solution

The use of light polarization components to separate each pixel into multiple pixels by deflecting polarization light components, allowing for increased display resolution without altering the display panel, achieved through an image-display component and a polarization-dependent image offset component, which modulates and separates pixel lights based on polarization states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If panels with higher pixel density are used, then angular resolution is improved, but optical efficiency deteriorates due to reduced aperture ratio

Engineering Contradiction:
Improveangular resolutionVSAvoidoptical efficiency
Core Design Contradiction:
Measurement precisionVSLoss of energy

Solution Approach 1:

The patent introduces a temporal dimension to the display system by implementing time-multiplexed sub-frames. Instead of increasing spatial pixel density, the system displays multiple lower-resolution frames at different time intervals with different pixel offsets, effectively synthesizing a higher angular resolution through temporal integration while preserving the physical aperture ratio and optical efficiency of the display panel.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Measurement precision

If time-multiplexing is used to increase pixel density, then angular resolution is improved, but frame rate deteriorates causing image blurs

Engineering Contradiction:
Improveangular resolutionVSAvoidframe rate
Core Design Contradiction:
Measurement precisionVSSpeed

Solution Approach 1:

The patent implements dynamic pixel offset adjustment where the relative offset between sub-frames is varied according to the motion characteristics of the displayed content. For static or slow-moving objects, larger offsets are used to maximize resolution enhancement. For fast-moving objects, the system dynamically reduces offsets or adjusts timing to maintain frame rate and prevent motion blur, creating a dynamic adaptation mechanism that optimizes both resolution and temporal performance.

Inventive Principle:
Principle #15Dynamics

3Measurement precision

If spatial multiplexing with stacked LCD panels is used, then pixel density is increased, but light transmission deteriorates due to low transmittance

Engineering Contradiction:
Improvepixel densityVSAvoidlight transmission
Core Design Contradiction:
Measurement precisionVSIllumination intensity

Solution Approach 1:

The patent segments the display function into two independent components: a single high-transmittance display panel for light generation and a separate optical element (such as a grating or prism array) for pixel separation and offset generation. This segmentation eliminates the need for multiple stacked LCD panels, preserving high light transmission while achieving increased pixel density through optical manipulation of the light from the single panel.

Inventive Principle:
Principle #1Segmentation

4Measurement precision

If pixel offset methods are used to increase resolution, then angular resolution is improved, but device complexity increases

Engineering Contradiction:
Improveangular resolutionVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical or multi-panel spatial multiplexing systems with a simpler optical modulation approach using a single display panel combined with an optical element (grating, prism, or metasurface). The pixel offset and separation functions are achieved through optical interference and diffraction rather than mechanical stacking or multiple active panels, significantly reducing device complexity while maintaining angular resolution enhancement.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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 display resolution without sacrificing frame rate or increasing light loss, reducing the screen-door effect and maintaining original frame rates, while also lowering processing and power consumption requirements.

Implementation Method 1

at least one pixel light of the image light output has light polarization components of at least two polarization states

Methodology Applied
Scientific EffectLight polarization: Polarisation

Implementation Method 2

a polarization dependent image offset component, which receives the image light output coming from the image-display component and deflects the polarization light components based on the polarization states

Methodology Applied
Scientific EffectPolarization-dependent deflection: Birefringence

Data Source

PatentUS12050320B2Display device and electronic apparatus
Publication Date: 2024.07.30 UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION INC
  • US12050320B2 patent drawing
  • US12050320B2 patent drawing
  • US12050320B2 patent drawing

AI summary

A display device and an electronic apparatus are disclosed. The display device comprises: an image-display component, which generates an image light output, wherein at least one pixel light of the image light output has light polarization components of at least two polarization states or has a polarization light component of a polarization state and a non-polarization light component; and a polarization dependent image offset component, which receives the image light output coming from the image display component and deflects the polarization light components based on the polarization states to separate each of the at least one pixel light into at least two pixel lights, or deflects the polarization light component from the non-polarization light component to separate each of the at least one pixel light into at least two pixel lights.