Optical Module Display Layout for Wavefront Correction and Light Blocking

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Solution Overview

Problem

In display devices with optical modules in the display area, wavefront distortion of light collected by the optical module on the bottom surface of the lower substrate causes image distortion, and the introduction of excessive light from the light emitting structure adjacent to the optical module results in defects in the captured image.

Innovation Solution

A display device configuration with a lower substrate, an optical module, a light emitting structure, an upper substrate, a filling layer, and a light blocking layer, where the light blocking layer absorbs light traveling from the light emitting structure to reduce the amount of light introduced into the optical module, thereby minimizing image defects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a filling layer is disposed on the top surface of the lower substrate to overlap the optical module, then wavefront distortion of light is reduced, but a relatively greater amount of light emitted from the light emitting structure is introduced into the optical module causing image defects

Engineering Contradiction:

Improveimage qualityVSAvoidlight interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent divides the region around the optical module into multiple zones: a first region where the filling layer is disposed to correct wavefront distortion, and a second region where a light blocking layer is disposed to prevent excessive light from the light emitting structure. This segmentation allows simultaneous implementation of wavefront correction and light interference prevention without mutual interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filling layer is selectively disposed only in the first region overlapping the optical module, while the light blocking layer is disposed in the second region adjacent to the first region. This local quality approach ensures that wavefront correction is applied precisely where needed (over the optical module) while light blocking is applied only where necessary (adjacent regions), avoiding unnecessary interference with the optical path.

Inventive Principle:

Principle #3Local quality

2Device complexity

If the optical module is disposed on the bottom surface of the lower substrate in the display area, then integration is improved, but wavefront distortion of light causes image distortion

Engineering Contradiction:

Improvestructure integrationVSAvoidimage distortion

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The filling layer acts as an intermediary substance disposed between the lower substrate and the optical module in the first region. This filling layer compensates for the wavefront distortion caused by the integrated structure, allowing the optical module to be disposed on the bottom surface of the lower substrate while maintaining image quality through the mediating effect of the filling layer on the light path.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If light blocking layer is disposed in the second area, then light from light emitting structure is blocked, but may affect light transmission to optical module

Engineering Contradiction:

Improvelight interferenceVSAvoidlight transmission

Core Design Contradiction:

Object-affected harmful factorsVSUse of energy by moving object

Solution Approach 1:

The patent segments the structure into a first region with the filling layer for light transmission and wavefront correction, and a second region with the light blocking layer for blocking excessive light from the light emitting structure. This segmentation ensures that the light blocking layer only blocks light from adjacent areas while the filling layer in the first region maintains proper light transmission and wavefront correction to the optical module.

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 light blocking layer effectively reduces the amount of light introduced into the optical module, minimizing image defects and improving the quality of the captured image by absorbing light emitted from the light emitting structure adjacent to the optical module.

Implementation Method 1

the light blocking layer absorbs light traveling from the light emitting structure to reduce the amount of light introduced into the optical module

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 2

each of the upper substrate, the lower substrate, and the filling layer may have a refractive index of about 1.4 to about 1.6

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS11943992B2Display device including optical module

Publication Date: 2024.03.26 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes an optical module, a light emitting structure, a lower substrate including a display area, and in order within the display area a first area corresponding to the optical module, second area adjacent to the optical module, and a third area including the light emitting structure, a light-transmitting filling layer in the first area and corresponding to the optical module, a light blocking layer in the second area and defining an opening corresponding to the light-transmitting filling layer in the first area, and an upper substrate facing the lower substrate with the light emitting structure and the light blocking layer therebetween.