Infrared-Transmitting Mark for Display Assembly

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Solution Overview

Problem

Existing alignment and identification marks in display devices, such as those formed using white ink, are not durable, accurate, or aesthetically pleasing, as they can be easily damaged and perceived by users, leading to reduced assembly precision and external aesthetic concerns.

Innovation Solution

A mark substrate and window cover design incorporating a base substrate with a light-blocking layer and an infrared-transmitting member, where the infrared-transmitting member is inserted into the light-blocking layer to create a two-dimensional mark that is optically distinguishable and enhances durability and recognition accuracy while blocking visible rays, thus preventing user perception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional white ink marks are used for alignment and identification, then the marks are visible and can be easily applied, but they lack durability and can be easily damaged

Engineering Contradiction:

Improvemark durabilityVSAvoidmark application simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent uses a composite structure combining a light-blocking layer and an infrared-transmitting member to create a mark that is both durable and functional. The light-blocking layer provides structural integrity and durability, while the infrared-transmitting member enables optical detection, resolving the contradiction between durability and manufacturability.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the optical parameters of the mark by using materials with specific infrared transmission properties. The infrared-transmitting member has high infrared ray transmittance (80% or greater) while the light-blocking layer blocks visible light, creating a mark that is durable and detectable by sensors without being visible to users.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If infrared-transmitting member is inserted into light-blocking layer to create durable mark, then mark durability and recognition accuracy improve, but device structure becomes more complex

Engineering Contradiction:

Improveassembly accuracyVSAvoidmark structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent divides the mark into two distinct segments: a light-blocking layer and an infrared-transmitting member. This segmentation allows each component to be optimized independently for its specific function, improving assembly accuracy while managing complexity through modular design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The infrared-transmitting member is inserted into an opening or groove defined in the light-blocking layer, creating a nested structure. This nesting approach integrates multiple functions into a compact form, improving manufacturing precision without significantly increasing overall device complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Illumination intensity

If infrared-transmitting member is used to create invisible mark, then user aesthetic perception is maintained, but mark visibility to sensors must be ensured

Engineering Contradiction:

Improvevisible light blockingVSAvoidinfrared detection accuracy

Core Design Contradiction:

Illumination intensityVSMeasurement precision

Solution Approach 1:

The patent applies different optical properties to different parts of the mark structure. The light-blocking layer blocks visible light to maintain aesthetic appearance, while the infrared-transmitting member transmits infrared light for sensor detection. This local differentiation of optical properties resolves the contradiction between visibility and aesthetics.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses materials with selective optical absorption and transmission properties. The infrared-transmitting member has high infrared ray transmittance (80% or greater) while the light-blocking layer blocks visible light, creating a mark that is invisible to users but detectable by infrared sensors, effectively using optical property changes to resolve the contradiction.

Inventive Principle:

Principle #32Color changes

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 increases the accuracy of the assembling process and maintains the aesthetic appeal of the display device by providing a more durable and recognizable alignment or identification mark that is not visible to users due to its infrared properties.

Implementation Method 1

an infrared-transmitting member... having a two-dimensional shape and optically distinguished from an adjacent area... an infrared ray transmittance of the infrared-transmitting member may be about 80% or greater, and a visible ray transmittance of the infrared-transmitting member may be about 10% or less

Methodology Applied

Scientific EffectInfrared transmission: Absorption (EM radiation)

Data Source

PatentUS11636300B2Mark substrate, window cover including mark and display device including the same

Publication Date: 2023.04.25 SAMSUNG DISPLAY CO LTD

AI summary

A mark substrate includes a base substrate, a light-blocking layer disposed on the base substrate, where an opening or a groove is defined in the light-blocking layer, and an infrared-transmitting member. At least a portion of the infrared-transmitting member is disposed in the opening or the groove of the light-blocking layer to define a mark having a two-dimensional shape and optically distinguished from an adjacent area.