Integrated Optical Elements on Display Panels for VR

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Solution Overview

Problem

Existing electronic devices for virtual reality (VR), augmented reality (AR), and mixed reality (MR) have complex structures due to the need for separate optical components like reflection mirrors and lenses, which complicates manufacturing and increases weight and volume, while also limiting resolution and color implementation.

Innovation Solution

An electronic device with a simplified mechanical structure that transmits image light directly from optical elements disposed on display panels, using mono-color optical elements emitting red, green, and blue light, which are combined to achieve stable images and overcome resolution limitations, without a separate optical engine, and includes a micro LED and transparent electrode for improved performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate optical components like reflection mirrors and lenses are used to transmit image light, then the image transmission function is achieved, but the device structure becomes complicated and weight increases

Engineering Contradiction:
Improveimage transmission functionVSAvoiddevice structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent integrates the optical element directly onto the display panel, merging previously separate components (display panel, optical element, and image receiving unit) into a unified structure. This eliminates the need for separate reflection mirrors and lenses, simplifying the device structure while maintaining the image transmission function.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The display panel serves multiple functions: it displays images and simultaneously acts as the image receiving unit that captures and transmits light to the user's eyes. The optical element integrated on the panel performs both optical manipulation and structural support functions, reducing the need for additional dedicated components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If separate optical components like reflection mirrors and lenses are used, then image transmission is achieved, but the device weight and volume increase

Engineering Contradiction:
Improveimage transmission functionVSAvoiddevice weight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

By merging the optical element with the display panel into a single integrated unit, the patent eliminates the weight of separate reflection mirrors and lenses. The combined structure uses the display panel substrate as the mounting base for the optical element, removing the need for additional structural supports and reducing overall device weight.

Inventive Principle:
Principle #5Merging (Combining)

3Reliability

If separate optical components are used, then image transmission is achieved, but manufacturing difficulty increases

Engineering Contradiction:
Improveimage transmission functionVSAvoidmanufacturing difficulty
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The integration of the optical element directly onto the display panel creates a unified manufacturing process. Instead of assembling multiple separate components (display panel, reflection mirrors, lenses, structural supports), the patent enables direct fabrication or bonding of the optical element to the panel in a single manufacturing step, significantly simplifying production.

Inventive Principle:
Principle #5Merging (Combining)

4Device complexity

If mono-color optical elements are used, then device complexity is reduced, but color implementation becomes challenging

Engineering Contradiction:
Improveoptical structureVSAvoidcolor implementation
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent employs different colored optical elements (red, green, blue) at specific locations corresponding to the sub-pixel arrangement on the display panel. Each optical element is optimized for its specific color wavelength, and together they reconstruct the full-color image through spatial arrangement, maintaining simplicity while achieving color versatility.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The optical element is divided into multiple segmented regions, each corresponding to a specific color channel (R, G, B). This segmentation allows each portion to be optimized for its specific color while collectively providing full-color capability. The segmented structure mirrors the sub-pixel layout of the display panel, enabling simple color implementation through spatial arrangement.

Inventive Principle:
Principle #1Segmentation

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 simplifies the optical paths, enhances image stability, and allows for efficient color implementation, improving durability and resolution while reducing the overall device complexity and weight.

Implementation Method 1

an optical element disposed on the display panel, wherein the optical element is configured to emit light in a red color range, a green color range, or a blue color range

Methodology Applied
Scientific EffectLight emission from optical elements: Light Emitting Diode

Implementation Method 2

transmits image light emitted from the optical element to an eye of a user through the display panel

Methodology Applied
Scientific EffectLight transmission and direction: Refraction

Data Source

PatentUS11398461B2Electronic device
Publication Date: 2022.07.26 LG ELECTRONICS INC
  • US11398461B2 patent drawing
  • US11398461B2 patent drawing
  • US11398461B2 patent drawing

AI summary

An electronic device comprising: a first display panel having a first side facing an eye of a user; a second display panel having a first side disposed at a second side of the first display panel; a first optical element disposed at the first display panel to emit one of red (R), green (G), or blue (B) light; a second optical element disposed at the first display panel together with the first optical element and configured to emit another one of the R, G, or B light; and a third optical element disposed at the second display panel to emit the remaining one of the R, the G, and the B light. The electronic device according to the present disclosure may be associated with an artificial intelligence module, a robot, an augmented reality (AR) device, a virtual reality (VR) device, and a device related to 5G services and the like.