Graphite Sheet Heat Dissipation for Quantum Dot Backlight Modules
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Solution Overview
Problem
The heat resistance of quantum dots (QDs) in backlight modules is inadequate, leading to aging issues at high temperatures, which restricts their application, especially in LED chip packages, and is accompanied by high costs and increased optical loss due to scattering films.
Innovation Solution
A backlight module design incorporating a quantum dot (QD) layer between an LED component and a light guiding plate, where the QD layer is adhered to a graphite sheet with protrusions and holes for secure fixation, allowing for effective heat dissipation and reduced thickness through the use of a reflective sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dots are used in backlight modules to enhance color gamut, then display performance is improved, but heat resistance becomes inadequate leading to aging issues at high temperatures
Solution Approach 1:
A heat dissipation sheet is introduced as an intermediary component between the quantum dot layer and the LED component. This mediator transfers heat away from the quantum dots, allowing them to maintain their color enhancement function while protecting them from thermal degradation and aging
Solution Approach 2:
The backlight module is segmented into distinct functional layers: LED component layer, heat dissipation sheet layer, and quantum dot layer. This segmentation allows each component to be optimized independently - the heat dissipation sheet handles thermal management while the quantum dot layer focuses on color gamut enhancement
2Stability of the object's composition
If additional scattering film is added to the backlight module to improve quantum dot fixation, then stability is improved, but optical loss increases
Solution Approach 1:
The scattering film function is extracted and replaced by the heat dissipation sheet's surface structure. The heat dissipation sheet provides quantum dot fixation through its textured surface without introducing the additional optical scattering that causes energy loss
Solution Approach 2:
The heat dissipation sheet serves multiple functions simultaneously: it provides thermal management for the quantum dots, fixes the quantum dot layer in place through its surface structure, and maintains optical efficiency by avoiding additional scattering
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 extends the life cycle of QDs and LEDs by dissipating heat, enhances display performance, reduces costs by eliminating the need for additional heat dissipation measures, and minimizes light leakage through optimized light guiding plate design.
Implementation Method 1
the QD layer is arranged on the graphite sheet... by dissipating heat
Implementation Method 2
a bottom of the light guiding plate includes a reflective sheet... minimizes light leakage through optimized light guiding plate design
Implementation Method 3
the quantum dots (QD) backlight technology has been developed, which may enhance the color gamut to 100%
Data Source
AI summary
The present invention discloses a backlight module and a liquid crystal device (LCD). The backlight module includes a LED component, a light guiding plate, a quantum dot (QD) layer, and a graphite sheet. The QD layer is arranged between the LED component and the light guiding plate, and the QD layer is arranged on the graphite sheet. By configuring the QD layer on the graphite sheet, the QD layer is prevented from being failed due to high temperature so as to extend the life cycle of the QD layer. Thus, the display performance may be enhanced.