Display Device Optical Adjustment Member for Measurement Precision

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Solution Overview

Problem

Existing display devices face measurement errors due to changes in external conditions, such as temperature, which affect the relative position of light receiving holes and optical sensors, leading to inconsistent light measurement.

Innovation Solution

A display device design that includes a light guide plate, an optical sensor, and an optical adjustment member, where the optical sensor is exposed through a light receiving hole to maintain consistent light measurement by reducing luminance and ensuring constant light incidence, even with changes in external conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the optical sensor measures light under changing external conditions, then the measurement process remains simple, but measurement precision deteriorates due to position changes between light receiving hole and optical sensor

Engineering Contradiction:

Improvemeasurement process simplicityVSAvoidluminance measurement accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The optical adjustment member is pre-installed in the light receiving hole before the measurement process. This preliminary action ensures that the optical path is pre-configured to accommodate thermal expansion and position changes, allowing the optical sensor to maintain accurate measurements without requiring real-time adjustment during operation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The optical adjustment member acts as an intermediary element between the light receiving hole and the optical sensor. It mediates the optical path by adjusting light incidence angles and reducing luminance, thereby compensating for position deviations caused by thermal deformation and ensuring consistent measurement conditions

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the optical adjustment member reduces luminance of incident light, then measurement precision improves by maintaining uniform conditions, but device complexity increases

Engineering Contradiction:

Improvelight measurement consistencyVSAvoidoptical component structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The optical adjustment member modifies optical parameters (luminance and incidence angle) of the light passing through the light receiving hole. By changing these parameters, the system maintains uniform measurement conditions despite external temperature variations, achieving consistent measurements without complex mechanical adjustment mechanisms

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The optical adjustment member is positioned specifically at the light receiving hole location where it is most needed. It provides localized optical adjustment only at this critical interface between the light guide plate and optical sensor, rather than requiring system-wide complexity

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If the display device is thermally deformed due to temperature change, then adaptability to environmental conditions improves, but measurement precision deteriorates due to relative position changes

Engineering Contradiction:

Improveenvironmental condition toleranceVSAvoidrelative position stability

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The optical adjustment member is designed to preemptively counteract the effects of thermal deformation. By being pre-installed and configured in the light receiving hole, it creates an optical path that is inherently resistant to position changes caused by thermal expansion, preventing measurement errors before they occur

Inventive Principle:

Principle #9Preliminary anti-action

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 design allows for precise control of the light source by maintaining uniform measurement conditions, reducing measurement errors caused by external changes and ensuring accurate light adjustment for improved display quality.

Implementation Method 1

an optical adjustment member interposed between the light guide plate and the optical sensor to reduce luminance of the light incident to the optical sensor

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Data Source

PatentUS8733998B2Display device

Publication Date: 2014.05.27 SAMSUNG DISPLAY CO LTD

AI summary

A display device is provided, which can precisely control a light source by measuring the quantity of light from the light source under uniform conditions. The display device includes a display panel displaying an image, a light source generating light, a light guide plate guiding and providing the light to the display panel, a receptacle accommodating the light source and the light guide plate, an optical sensor fixed to the receptacle to sense the light, a light receiving hole formed at an edge of the receptacle to provide a path through which the light reaches the optical sensor, and an optical adjustment member interposed between the light guide plate and the optical sensor to reduce luminance of the light incident to the optical sensor. The optical sensor is completely exposed to the optical adjustment member through the light receiving hole.