Asymmetric Color Filter Layout for Wider-Angle Virtual Displays

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Solution Overview

Problem

Existing virtual image display devices face challenges in simultaneously improving image quality and reducing the size of the electronic apparatus, such as head-mounted displays, as enhancing resolution often leads to increased size and weight.

Innovation Solution

A display device with a specific arrangement of light-emitting elements and color filters, where the relative positional relationships between the centers of the elements and filters differ, allowing for a wider angle of view while maintaining the size of the light-emitting elements, thereby enhancing image quality and reducing the device's size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the display device is made larger to enhance resolution and brightness, then image quality is improved, but the size and weight of the electronic apparatus increase

Engineering Contradiction:

ImproveresolutionVSAvoidsize of display device

Core Design Contradiction:

Measurement precisionVSVolume of moving object

Solution Approach 1:

The patent applies asymmetry by deliberately positioning the color filter center at a different location relative to the light-emitting element center compared to conventional symmetric arrangements. Specifically, the color filter center is offset toward the center side of the display region, creating an asymmetric configuration that optimizes light extraction and angle of view while maintaining compact device size.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent utilizes dimensional change by adjusting the positional relationship in the plane view (two-dimensional arrangement) to achieve three-dimensional optical performance benefits. By changing the relative position of color filter and light-emitting element in the planar arrangement, the system achieves improved angle of view and light extraction efficiency without increasing the overall device volume.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Illumination intensity

If the light-emitting element size is increased to improve brightness and resolution, then image quality is enhanced, but the device size increases

Engineering Contradiction:

ImprovebrightnessVSAvoidsize of display device

Core Design Contradiction:

Illumination intensityVSVolume of moving object

Solution Approach 1:

The asymmetric positioning of the color filter relative to the light-emitting element optimizes the light extraction efficiency and angle of view. This asymmetric arrangement allows the system to achieve improved brightness and resolution without requiring larger light-emitting elements, thereby maintaining a compact device size.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent changes the positional parameter of the color filter center relative to the light-emitting element center. By adjusting this positional parameter to create an asymmetric configuration, the system achieves improved light extraction and brightness without increasing the physical size of the light-emitting elements or the overall device.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the angle of view is widened to improve image quality, then display performance is enhanced, but the device size increases

Engineering Contradiction:

Improveangle of viewVSAvoidsize of display device

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The asymmetric positioning of the color filter toward the center side of the display region creates an optical configuration that widens the angle of view. This asymmetric arrangement allows light to be extracted more effectively at various angles without requiring a larger device structure, thereby achieving improved adaptability while maintaining compact size.

Inventive Principle:

Principle #4Asymmetry

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

The solution enables both improved image quality and reduced size of the electronic apparatus by maintaining the size of the light-emitting elements and widening the angle of view, allowing for brighter and higher resolution displays.

Implementation Method 1

a first color filter through which light from the first light-emitting element passes, and a second color filter through which the light from the second light-emitting element passes

Methodology Applied

Scientific EffectOptical filtering: Filter (optical)

Data Source

PatentUS20260044006A1Display device with at least two emitting elements and two filters, and different positional relationships

Publication Date: 2026.02.12 SEIKO EPSON CORP

AI summary

The display device includes the first light-emitting element, a second light-emitting element, a first color filter through which light from the first light-emitting element passes, and a second color filter through which the light from the second light-emitting element passes. The relative positional relationship between the center of the first light-emitting element and the center of the first color filter is different from the relative positional relationship between the center of the second light-emitting element and the center of the second color filter.