Dual Backlight Module Blue Light Hazard Control

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Solution Overview

Problem

Current display devices emit blue light that disrupts human biological clocks, affecting melatonin levels and causing sleepiness and decreased work efficiency, with existing treatments mainly relying on medication rather than controlling light exposure.

Innovation Solution

A display device with a dual backlight module that includes a first light source with a lower blue-light hazard intensity and a second light source with a higher blue-light hazard intensity, controlled by a module that switches between the two sources based on working and non-working periods to adjust melatonin secretion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single backlight source is used in display devices, then the device structure is simple, but it cannot adjust blue-light hazard intensity to match different working modes

Engineering Contradiction:

Improveadaptability to different working modesVSAvoidbacklight module structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The backlight module is segmented into a first backlight source and a second backlight source with different blue-light hazard characteristics. The control module separately controls each backlight source based on working mode, enabling adaptability without requiring complete redesign of the backlight system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dual backlight source system provides multi-functionality by serving different purposes in different modes: the first backlight source for normal working hours and the second backlight source for non-working hours, making the backlight module adaptable to various temporal contexts.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If blue light intensity is increased to enhance alertness during work, then work efficiency improves, but melatonin secretion is suppressed affecting sleep quality

Engineering Contradiction:

Improvework efficiencyVSAvoidmelatonin suppression

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The control module implements periodic action by switching between the first and second backlight sources based on temporal periods (working hours vs. non-working hours). During working hours, the first backlight source enhances alertness; during non-working hours, the second backlight source preserves sleep quality.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system dynamically adjusts the backlight source selection based on the temporal context. The control module changes the operational state of different backlight sources according to whether it is working hours or non-working hours, making the blue-light hazard intensity adaptive rather than static.

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If medication is used to treat melatonin imbalance, then sleep quality can be improved, but it does not address the root cause of blue light exposure

Engineering Contradiction:

Improvemelatonin imbalanceVSAvoidblue light exposure

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful effect of blue light into a beneficial one by using controlled blue light exposure during working hours to enhance alertness and productivity, while avoiding harmful exposure during non-working hours to preserve sleep quality, thus addressing the root cause rather than treating symptoms.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 effectively suppresses melatonin levels during work hours to enhance alertness and increases melatonin levels during rest hours, improving sleep quality and work efficiency by controlling blue-light exposure.

Implementation Method 1

a first light source 122a and a second light source 122b. The first light source 122a emits light having a first spectrum, and the second light source 122b emits light having a second spectrum different from the first spectrum

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Data Source

PatentUS20160330813A1Display device and driving method of backlight module

Publication Date: 2016.11.10 AU OPTRONICS CORP

AI summary

A display device and driving method of a backlight module are disclosed. The display device includes a display panel and a backlight module. The backlight module includes a first light source, a second light source and a control module. The first light source emits a first spectrum with a first stimulus and the second light source emits a second spectrum with a second stimulus. The second stimulus is substantially bigger than the first stimulus. The control module enables the second light source during a first period and enables the first light source during a second period.