Rear-Mounted Light Source Unit with Quantum Dots
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Solution Overview
Problem
The challenge is to create a small-sized electronic apparatus with improved optical characteristics while maintaining a thin profile, as the inclusion of various optical members to enhance display quality often increases the thickness of liquid crystal display devices.
Innovation Solution
The electronic apparatus incorporates a light source unit with a plate featuring a light scattering section and a light controlling section containing quantum dots, where the light source is positioned on the rear surface of the plate, and an optical sheet is placed between the display unit and the light source unit, utilizing conductive lines and pastes for connection, and a light reflecting section to enhance optical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If various optical members are included in the light source unit to improve display quality and optical efficiency, then optical characteristics are improved, but the total thickness of the display device increases
Solution Approach 1:
The patent combines multiple optical members (light scattering section, light controlling section with quantum dots, light reflecting section) into a single integrated light source unit structure. This merging allows the optical functions to be achieved within a compact thickness while maintaining improved optical characteristics, directly resolving the contradiction between optical performance and device thickness.
Solution Approach 2:
The light source unit employs a nested arrangement where the light scattering section, light controlling section, and light reflecting section are positioned in sequence along the light path within a compact structure. The light source is positioned at the rear surface of the plate, with optical members arranged in front, creating a nested configuration that maximizes optical efficiency without increasing overall thickness.
2Length of stationary object
If the light source is positioned on the rear surface of the plate to reduce thickness, then device thickness is reduced, but optical efficiency may be compromised
Solution Approach 1:
The patent introduces a light scattering section and light controlling section as intermediary elements between the rear-positioned light source and the display unit. These intermediaries redirect and control the light from the rear-mounted source to ensure efficient light delivery to the display, compensating for the reduced light path length and maintaining high optical efficiency despite the compact thickness.
Solution Approach 2:
The light controlling section incorporates quantum dots that convert light wavelengths to achieve precise color control. This color conversion mechanism ensures that the compact rear-mounted light source can still provide high-quality, efficient light to the display unit by optimizing the spectral characteristics of the light.
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 configuration allows for a compact electronic apparatus with improved optical characteristics and color purity, reducing the overall thickness while maintaining high optical efficiency and brightness.
Implementation Method 1
a light scattering section on the front surface of the plate
Implementation Method 2
the light controlling section includes a plurality of quantum dots
Implementation Method 3
a light emitting element which generates light
Data Source
AI summary
A light source unit includes a plate including a front surface and a rear surface opposite to the front surface, a light scattering section on the front surface of the plate, a light controlling section on the light scattering section and including a plurality of quantum dots, a light source on the rear surface of the plate and including a light emitting element which generates light, a light emitting surface from which the light is emitted, and a plurality of lead frames connected to the light emitting element. The light source provides light from the rear surface of the plate toward the light controlling section. The light emitting surface of the light source is in contact with the rear surface of the plate.