Backlight Module Protrusion Absorbs Shock and Directs Light
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Solution Overview
Problem
Conventional backlight modules for LCD devices are prone to damage from shock and vibration, and suffer from light leakage and overheating issues due to the placement of the light source and optical films, which affects light utilization efficiency and the integrity of the display.
Innovation Solution
A backlight module design featuring a light guide plate with a protrusion that forms an accommodating space for the light source, which includes a U-shaped reflector and rubber blocks to absorb mechanical forces and thermal energy, preventing damage and overheating, and enhancing light utilization by directing light beams effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the light source is placed adjacent to the light incident surface of the light guide plate, then light beams can be emitted effectively, but the light source is vulnerable to damage from shock and vibration
Solution Approach 1:
The light source is nested within the accommodating space formed by the protrusion and light incident surface of the light guide plate. This nesting structure protects the light source from shock and vibration while maintaining its position for effective light emission into the light guide plate.
Solution Approach 2:
The accommodating space acts as an intermediary structure between the light source and the external environment. It provides mechanical protection and thermal management while allowing optical coupling between the light source and light guide plate for efficient light transmission.
2Use of energy by moving object
If the optical films are placed close to the light source, then light utilization efficiency is improved, but the optical films become overheated and distorted
Solution Approach 1:
The backlight module is segmented into distinct functional zones: the light source accommodation zone, the light guide plate, and the optical films. This spatial segmentation allows the optical films to be positioned for optimal light utilization while maintaining sufficient distance from the light source to avoid overheating and distortion.
3Strength
If the U-shaped reflector is used to hold the light source, then structural support is provided, but light beams may leak out when the reflector becomes distorted
Solution Approach 1:
The light source and reflector are nested within the accommodating space defined by the light guide plate's protrusion and light incident surface. This nested structure provides robust structural support while constraining the reflector to prevent distortion that would cause light leakage, thereby maintaining light utilization 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
The solution effectively protects the light source from mechanical stress and overheating, reducing light leakage and improving light utilization efficiency while maintaining the structural integrity and performance of the backlight module.
Implementation Method 1
two rubber blocks engaged with two ends of the CCFL 131 respectively... only the two rubber blocks 135 absorb mechanical force that transmits from the LGP 11 to the CCFL 131
Implementation Method 2
a U-shaped reflector 133 partially enclosing the CCFL 131... light beams emitted by the CCFL 131 may leak out from the backlight module 1
Implementation Method 3
the protrusion and the light incident surface cooperatively form an accommodating space. The light source is substantially received in the accommodating space
Data Source
AI summary
An exemplary backlight module (2) includes a light guide plate (21) and a light source (23). The light guide plate includes a main body, a protrusion (217) extending from an end of the main body, a main light emitting surface (211), and a light incident surface (215) at the end of the main body. Wherein one side of the protrusion forms a part of the light emitting surface, another side (2171) of the protrusion is adjacent to the light incident surface. The protrusion and the light incident surface cooperatively form an accommodating space. The light source is substantially received in the accommodating space.