LCD Heat Dissipation via Point Light Source Mounting
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Solution Overview
Problem
Liquid crystal displays (LCDs) face challenges in achieving improved heat dissipation and reduced thickness, especially when using point light sources like LEDs, as existing designs struggle to efficiently manage heat and maintain compactness.
Innovation Solution
The implementation of a liquid crystal display (LCD) design that incorporates a heat-dissipating member within a lower housing, featuring point light sources mounted on the heat-dissipating member, a light guide plate with side surfaces facing the light sources, and a reflective sheet to enhance heat dissipation and reduce thickness by using thermally conductive materials and optimized structural arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If point light sources such as LEDs are used as light sources of a backlight assembly, then color reproducibility and compactness are improved, but heat dissipation becomes more difficult
Solution Approach 1:
The patent transitions from conventional planar light source arrangement to a three-dimensional structure where the light guide plate is positioned at an angle (e.g., 45 degrees) relative to the point light sources. This spatial reconfiguration allows heat to be directed toward dedicated heat dissipation structures while maintaining effective light guidance, thereby improving heat dissipation without compromising illumination quality
Solution Approach 2:
The patent introduces a heat dissipation structure that acts as an intermediary between the point light sources and the surrounding environment. This intermediate structure efficiently transfers heat away from the LED sources while allowing the optical system to function independently, thus resolving the conflict between compactness and heat management
2Weight of stationary object
If the structure of each part of an LCD is changed to make the LCD more compact and lighter, then weight and size are reduced, but heat dissipation efficiency deteriorates
Solution Approach 1:
The patent divides the backlight assembly into functionally independent modules: a compact light source unit with point LEDs, a separate heat dissipation structure, and a light guide plate. This segmentation allows each component to be optimized independently - the light source remains compact and lightweight while the heat dissipation structure is specifically designed for thermal management, achieving both weight reduction and heat dissipation efficiency
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 effectively dissipates heat generated by point light sources, maintains a compact structure, and reduces the overall thickness of the LCD, while ensuring efficient light guidance and distribution.
Implementation Method 1
a heat-dissipating member which is disposed in the lower housing; a plurality of point light sources which are disposed on the heat-dissipating member
Implementation Method 2
a light guide plate (LGP) which is disposed in the lower housing in such a way that side surfaces of the LGP face the point light sources
Data Source
AI summary
Provided is a liquid crystal display (LCD) with improved heat dissipation and reduced thickness. The LCD includes for an embodiment: a lower housing; a heat-dissipating member which is disposed in the lower housing; a plurality of point light sources which are disposed on the heat-dissipating member; a plurality of electric wires which supply power to the point light sources; and a light guide plate (LGP) which is disposed in the lower housing in such a way that side surfaces of the LGP face the point light sources.